High efficiency SHG of orbital angular momentum light in an external cavity

Size: px
Start display at page:

Download "High efficiency SHG of orbital angular momentum light in an external cavity"

Transcription

1 High efficiency SHG of orbital angular momentum light in an external cavity Zhi-Yuan Zhou 1,2,#1, Yan Li 1,2,#1, Dong-Sheng Ding 1,2, Yun-Kun Jiang 3, Wei Zhang 1,2, Shuai Shi 1,2, Bao-Sen Shi 1,2, * and Guang-Can Guo 1,2 1 Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, Anhui , China 2 Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui , China 3 College of Physics and Information Engineering, Fuzhou University, Fuzhou , China * Corresponding author: drshi@ustc.edu.cn Traditional methods for generating orbital angular momentum (OAM) light include holographic diffraction gratings, vortex phase plate and spatial light modulator. In this article, we report a new method for high efficient OAM light generation. By pumping an external cavity contains a quasi-phase matching nonlinear crystal with a fundamental OAM-carrying light and properly aligning the cavity, mode-matching between the pump light and the cavity s higher order Laguerre-Gaussian (LG) mode is achieved, conversion efficiency up to 10.3% have been obtained. We have demonstrated that the cavity can stably operate at its higher order LG mode just as Gaussian mode for the first time. The SHG light possesses a doubled OAM value with respect to the pump light. The parameters that affect the beam quality and conversion efficiency are discussed in detail. Our work opens a brand new field in laser optics, and makes the first step toward high efficiency OAM light processing. Orbital angular momentum (OAM) light has grasped great attentions since first introduced by Allen et. al. [1], the singularity of the spatial structure of OAM light makes them suitable for optical trapping and manipulation [2, 3]; for there is no dimension limitation in the OAM degree of freedom of light, OAM-carrying light is preferred for high capacity optical communications [4, 5] and quantum key distribution [6]; high dimensional OAM entangled photon pairs are applied in quantum information processing for demonstrating basic principle of quantum mechanics [7-10]. Traditional methods for generating OAM light are holographic diffraction gratings, vortex phase plate and spatial light modulator. To generate OAM light with wavelengths at special regions such as in the UV and infrared regions, the above methods will be difficult. Frequency conversion of OAM light at wavelengths that are easier to obtain using nonlinear crystals offers the convenient #1 These two authors have contributed equally to this article.

2 to achieve the above target. The frequency conversion of OAM light in birefringence phase matching (BPM) [11, 12] and quasi-phase matching (QPM) [13] crystals in the single pass configuration have been demonstrated. The above demonstrations only showed the possibility of frequency conversion of OAM light using nonlinear crystal, but the sufficient low conversion efficiency in the single pass configurations made them not suitable in practical usage. One common used method to enhance the conversion efficiency is to put the nonlinear crystal inside an optical cavity, the function of the cavity is to build up a circulating power that is many time relative to the pump power. For frequency conversion of pump light with Gaussian spatial shape, either BPM or QPM crystal is suitable. But for OAM light frequency conversion, QPM crystals have big advantages for its high effective nonlinear coefficient and no walk-off effect, the walk-off effect in BPM crystals distorts the frequency converted light spatial shape, and prevents one to obtain a high beam quality. All previous researches on frequency conversion of light in an external cavity configuration are focused on Gaussian mode [14-17], no one else has study the frequency conversion of higher order mode in an external cavity. The OAM modes (or Lagurre-Gaussian modes) are also eigen modes of a confocal cavity, by properly aligning the cavity, it can on resonance with OAM mode similar as Gaussian mode. In this article, high conversion efficiency of light carries OAM of 2 in an external confocal cavity has been studied for the first time. We obtained 22.5mW of SHG light with pump power of 219 mw, a conversion efficiency of 10.3%, this efficiency is comparable with conversion efficiency with Gaussian pump light. When the cavity is locked, the leakage of the pump beam and the SHG beam all have a donut-like shapes, the OAM value for the SHG light is doubled with respect to the pump light, which was demonstrated using interferometer method showed in ref.[13]. The article is organized as follows: the experimental setup is described in the first part; the experiments results and the parameters that affect the conversion efficiency and beam quality are discussed in detail in the second part; then we come to the conclusion part, further improvements of the experiment, and the promising applications are discussed there. The experimental setup is depicted in figure 1. The pump beam is from Ti:sapphire laser (Coherent, MBR110). The pump beam is modulated by an electro-optical modulator (EOM) with RF frequency of 11.9MHz; an isolator is placed behind the EOM to block back reflected light from the cavity; then the light is imprinted with OAM of value 2 using vortex phase plate (VPP, from RP photonics); the polarization of the OAM light is controlled using a half wave plate (HWP); the OAM light with proper polarization is mode-matched to the cavity using lenses; The confocal cavity is consisted of two concave mirrors (CM1 and CM2); the input coupler CM1 of curvature 51.85mm, has a transmittance of 4% for the pump beam at 795nm; the output coupler CM2 of curvature 60mm is high reflected coated for 795nm (R >99.9%) and high transmittance coated at 397.5nm (T>95%). The total length of the cavity is 80mm. The periodically poled KTP (PPKTP) crystal (Raicol Crystals) has a dimension of 1mm 2mm 10mm, both end faces are anti-reflected coated at 795nm and 397.5nm. The temperature of the crystal is controlled with a homemade temperature controller with stability of ±2mK; A piezoelectric transducer (PZT) is attached to CM2 for scanning and locking the cavity. The leakage of the pump beam and the generated SHG beam are separated by dichromatic mirror (DM), the transmission spectral of the cavity is detected using a fast photodiode (D). The signal from the detector is mixed with modulation signal of the EOM and filtered using a low pass filter to generate error signal for locking cavity. The error signal is processed using a homemade PID circuit and amplified using a

3 high voltage amplifier to control the PZT. Figure 1. Experimental setup for our experiments. The experimental results are showed in figure 2. When the cavity is aligned properly on resonance with the pump OAM beam, the transmission spectrum detected by photodiode and recorded using oscilloscope is showed in figure 2d, the highest peak corresponding to the LG eigen mode of the cavity, the other small peaks are unrelated mode due to imperfect mode matching between the pump beam and the cavity. When the cavity is locked to the highest peak using Pound-Drever-Hall method (PDH) [18], the leakage of the pump beam from the output coupler has a donut shape shows in figure 2a, the generated SHG beam has a donut spatial shape shows in figure 2b. The asymmetry and distortion in the shape is arising from defects in the cavity mirror and aberrations of beam propagation inside the cavity. We have demonstrated in our previous work [13] that the OAM is conversation in the SHG process, so the SHG beam possesses OAM value twice as that of the pump OAM value. We send the SHG beam into an interferometer the same as in Ref. [13], the interference pattern has a flower-like shape with 8 petals, so the OAM value of the SHG beam is 4, which is consistent with previous study. We also measure the SHG power as function of the pump power. The result is plotted in figure 2e, it shows that the SHG power is increasing nearly squared with respect to the increasing of the pump power, which is similar to SHG using Gaussian mode. When the pump power is 219mW, we obtained a SHG power of 22.5mW, corresponding to single side efficiency of 10.3%, if the output at the other mirror is considered, the efficiency will reach 20.6%, this efficiency is comparable with SHG pumping using Gaussian mode. For SHG using Gaussian mode, there exist an optimal coupling coefficient of the input coupler [16], this will be also true for SHG pump using LG mode. The locking behavior of our cavity on resonance with LG mode is the same as Gaussian mode, our

4 cavity can be operated on locking stably for hours. Figure 2. Experimental results. Images a and b are the shape of the pump beam leakage from the cavity output coupler and the shape of the SHG beam when the cavity is on locking respectively; image c is interference pattern of the SHG beam by sending it to an interferometer shows in ref. [13]; d is the transmission spectrum of the cavity; e shows the SHG power as function of the pump power. In conclusion, we have realized high efficiency SHG in an external cavity pumping using OAM light for the first time. Both the leakage of the pump and the SHG beams have a donut-like shapes, the OAM value of the SHG beam is verified to be doubled with respect to the pump. In this very first study, the mode-matching is not perfect and the beam quality is not that much so good, these problems can be solved by using high quality mirrors and purifying the spatial mode from the laser using single mode fiber. The conversion efficiency can also be improved by choosing a proper input coupling coefficient and designing a cavity with smaller beam waist. In our future

5 study, we will convert OAM light base on sum frequency generation in an external cavity, in this configuration, light with arbitrary OAM value can be converted with high efficient. The present work opens a new field in laser optics, and makes the first step towards high efficiency OAM light processing, which will find applications in OAM light based high capacity optical communications and quantum information processing. References [1] L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, and J. P. Woerdman, Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes. Phys. Rev. A 45, (1992). [2] M. P. MacDonald, et al. Creation and manipulation of three-dimensional optically trapped structures. Science 296, (2002). [3] M. Padgett, and R. Bowman, Tweezers with a twist. Nature photon. 5, (2011). [4]J. Wang, et al. Terabit free-space data transmission employing orbital angular momentum multiplexing. Nature Photon. 6, (2012). [5]N. Bozinovic, Y. Yue, Y. Ren, M. Tur, P. Kristensen, H. Huang, A. E. Willner, and S. Ramachandran, Terabit-Scale Orbital Angular Momentum Mode Division Multiplexing in Fibers. Science 340, (2013). [6]M. Mirhosseini1, O. S. Magana-Loaiza, M. N. O Sullivan, B. Rodenburg, M. Malik, D. J. Gauthier, and R. W. Boyd, High-dimensional quantum cryptography with twisted light. arxiv: v1[quant-ph]. [7]A. Mair, A. Vaziri, G. Weihs, and A. Zeilinger, Entanglement of the orbital angular momentum states of photons Nature 412, (2001). [8]A. C. Data, J. Leach, G. S. Buller, M. J. Padgett, and E. Andersson, Experimental high- dimensional two-photon entanglement and violations of generalized Bell inequality. Nature Phys. 7, (2011). [9]J. T. Barreiro, T.-C. Wei, and P. G. Kwiat, Beating the channel capacity limit for linear photonic superdense coding. Nature Phys. 4, (2008). [10]D.-S. Ding, Z.-Y. Zhou, B.-S. Shi, and G.-C. Guo, Single-Photon-level quantum imaging memory based on cold atomic ensembles. Nat. Commun. 4:2527 (2013). [11]K. Dholakia, N. B. Simpson, M. J. Padgett, and L. Allen, Second-harmonic generation and orbital angular momentum of light. Phys. Rev. A 54, R3742-R3745(1996) [12]J. Courtial, K. Dholakia,L. Allen, and M. J. Padgett, Second-harmonic-generation and the conservation of orbital angular momentum with high-order Laguerre-Ganssian modes. Phys. Rev. A 56, (1997). [13] Z. -Y. Zhou, D. S. Ding, Y. K. Jiang, Y. Li, S. Shi, X.-S. Wang, B.-S. Shi, and G.-C. Guo, Orbital angular momentum light frequency conversion and interference with quasi-phase matching crystals, arxiv: [physics.optics] [14]. E. S. Polzik, and H. J. Kimble, Frequency doubling with KNbO3 in an external cavity, Opt. Lett. 16, (1991). [15] K. Danekar, A. Khademian, and D. Shiner, Blue laser via IR resonant doubling with 71% fiber to fiber efficiency, Opt. Lett. 36, (2011). [16] X. Deng, J. Zhang, Y. C. Zhang, G. Li, and T. C. Zhang, Generation of blue light at 426 nm by frequency doubling with a monolithic periodically poled KTiOPO4, Optics Express 21, (2013). [17] S. Ast, R. M. Nia, A. Schönbeck, N. Lastzka, J. Steinlechner, T. Eberle, M. Mehmet, S.

6 Steinlechner, and R. Schnabel, High-efficiency frequency doubling of continuous-wave laser light, Opt. Lett. 36, (2011). [18]R.W. P. Drever, J. L. Hall, F. V. Kowalski, J. Hough, G. M. Ford, A. J. Munley, and H. Ward, Laser phase and frequency stabilization using and optical resonator, Appl. Phys. B (1983).

T here are many possible analytical solutions to the Maxwell equation in the paraxial approximation, including

T here are many possible analytical solutions to the Maxwell equation in the paraxial approximation, including OPEN SUBJECT AREAS: NONLINEAR OPTICS OPTICAL MANIPULATION AND TWEEZERS Received 7 May Accepted June Published July Correspondence and requests for materials should be addressed to B.-S.S. (drshi@ustc.

More information

Non-destructive splitter of twisted light

Non-destructive splitter of twisted light Non-destructive splitter of twisted light Yan Li, 1,2 Zhi-Yuan Zhou, 1,2,# Dong-Sheng Ding, 1,2 Wei Zhang, 1,2 Shuai Shi, 1,2 Bao-Sen Shi, 1,2* and Guang-Can Guo 1,2 1 Key Laboratory of Quantum Information,

More information

Tunable cavity-enhanced photon pairs source in Hermite-Gaussian mode

Tunable cavity-enhanced photon pairs source in Hermite-Gaussian mode Tunable cavity-enhanced photon pairs source in Hermite-Gaussian mode Zhi-Yuan Zhou,,2,# Yan Li,,2,# Dong-Sheng Ding,,2 Wei Zhang,,2 Shuai Shi,,2 Bao-Sen Shi,,2* and Guang-Can Guo,2 Key Laboratory of Quantum

More information

Efficient Generation of Second Harmonic Wave with Periodically. Poled MgO:LiNbO 3

Efficient Generation of Second Harmonic Wave with Periodically. Poled MgO:LiNbO 3 ISSN 2186-6570 Efficient Generation of Second Harmonic Wave with Periodically Poled MgO:LiNbO 3 Genta Masada Quantum ICT Research Institute, Tamagawa University 6-1-1 Tamagawa-gakuen, Machida, Tokyo 194-8610,

More information

Quantum interference of multimode two-photon pairs with a Michelson interferometer. Abstract

Quantum interference of multimode two-photon pairs with a Michelson interferometer. Abstract Quantum interference of multimode two-photon pairs with a Michelson interferometer Fu-Yuan Wang, Bao-Sen Shi, and Guang-Can Guo Key Laboratory of Quantum Information, University of Science and Technology

More information

High efficiency frequency upconversion of photons carrying orbital angular momentum for a quantum information interface

High efficiency frequency upconversion of photons carrying orbital angular momentum for a quantum information interface High efficiency frequency upconversion of photons carrying orbital angular momentum for a quantum information interface Ruikai Tang, Xiongjie Li, Wenjie Wu, Haifeng Pan, Heping Zeng and E Wu * State Key

More information

Miniaturization of an Optical Parametric Oscillator with a Bow-Tie. Configuration for Broadening a Spectrum of Squeezed Light

Miniaturization of an Optical Parametric Oscillator with a Bow-Tie. Configuration for Broadening a Spectrum of Squeezed Light ISSN 2186-6570 Miniaturization of an Optical Parametric Oscillator with a Bow-Tie Configuration for Broadening a Spectrum of Squeezed Light Genta Masada Quantum ICT Research Institute, Tamagawa University

More information

Experimental observation of optical vortex evolution in a Gaussian beam. with an embedded fractional phase step

Experimental observation of optical vortex evolution in a Gaussian beam. with an embedded fractional phase step Experimental observation of optical vortex evolution in a Gaussian beam with an embedded fractional phase step W.M. Lee 1, X.-C. Yuan 1 * and K.Dholakia 1 Photonics Research Center, School of Electrical

More information

Experimental observation of optical vortex evolution in a Gaussian beam. with an embedded fractional phase step

Experimental observation of optical vortex evolution in a Gaussian beam. with an embedded fractional phase step Experimental observation of optical vortex evolution in a Gaussian beam with an embedded fractional phase step W.M. Lee 1, X.-C. Yuan 1 * and K.Dholakia 1 Photonics Research Center, School of Electrical

More information

Evaluation of Second Order Nonlinearity in Periodically Poled

Evaluation of Second Order Nonlinearity in Periodically Poled ISSN 2186-6570 Evaluation of Second Order Nonlinearity in Periodically Poled KTiOPO 4 Crystal Using Boyd and Kleinman Theory Genta Masada Quantum ICT Research Institute, Tamagawa University 6-1-1 Tamagawa-gakuen,

More information

Supplementary Information. Holographic Detection of the Orbital Angular Momentum of Light with Plasmonic Photodiodes

Supplementary Information. Holographic Detection of the Orbital Angular Momentum of Light with Plasmonic Photodiodes Supplementary Information Holographic Detection of the Orbital Angular Momentum of Light with Plasmonic Photodiodes Patrice Genevet 1, Jiao Lin 1,2, Mikhail A. Kats 1 and Federico Capasso 1,* 1 School

More information

Multiple generations of high-order orbital angular momentum modes through cascaded third-harmonic generation in a 2D nonlinear photonic crystal

Multiple generations of high-order orbital angular momentum modes through cascaded third-harmonic generation in a 2D nonlinear photonic crystal Vol. 25, No. 10 15 May 2017 OPTICS EXPRESS 11556 Multiple generations of high-order orbital angular momentum modes through cascaded third-harmonic generation in a 2D nonlinear photonic crystal DAN WEI,1

More information

Superpositions of the Orbital Angular Momentum for Applications in Quantum Experiments

Superpositions of the Orbital Angular Momentum for Applications in Quantum Experiments Superpositions of the Orbital Angular Momentum for Applications in Quantum Experiments Alipasha Vaziri, Gregor Weihs, and Anton Zeilinger Institut für Experimentalphysik, Universität Wien Boltzmanngasse

More information

Comparison and characterization of efficient frequency doubling at nm with PPKTP, LBO and BiBO crystals

Comparison and characterization of efficient frequency doubling at nm with PPKTP, LBO and BiBO crystals Comparison and characterization of efficient frequency doubling at 397.5 nm with PPKTP, LBO and BiBO crystals Xin WEN 1,, Yashuai HAN 1, 1,, 3, *, and Junmin WANG 1 State Key Laboratory of Quantum Optics

More information

arxiv: v1 [physics.optics] 11 Jan 2016

arxiv: v1 [physics.optics] 11 Jan 2016 August 28, 2018 arxiv:1601.02374v1 [physics.optics] 11 Jan 2016 Abstract We report on efficient nonlinear generation of ultrafast, higher order perfect vortices at the green wavelength. Based on Fourier

More information

arxiv:quant-ph/ v2 11 Sep 2006

arxiv:quant-ph/ v2 11 Sep 2006 Spatial mode properties of plasmon assisted transmission Xi-Feng Ren,Guo-Ping Guo 1,Yun-Feng Huang,Zhi-Wei Wang,Guang-Can Guo arxiv:quant-ph/6322v2 11 Sep 26 Key Laboratory of Quantum Information and Department

More information

Torque transfer in optical tweezers due to orbital angular momentum

Torque transfer in optical tweezers due to orbital angular momentum Torque transfer in optical tweezers due to orbital angular momentum Simon J. W. Parkin, Gregor Knöner, Timo A. Nieminen, Norman R. Heckenberg and Halina Rubinsztein-Dunlop Centre for Biophotonics and Laser

More information

SMR WINTER COLLEGE QUANTUM AND CLASSICAL ASPECTS INFORMATION OPTICS. The Origins of Light s angular Momentum

SMR WINTER COLLEGE QUANTUM AND CLASSICAL ASPECTS INFORMATION OPTICS. The Origins of Light s angular Momentum SMR.1738-8 WINTER COLLEGE on QUANTUM AND CLASSICAL ASPECTS of INFORMATION OPTICS 30 January - 10 February 2006 The Origins of Light s angular Momentum Miles PADGETT University of Glasgow Dept. of Physics

More information

Amplitude damping of Laguerre-Gaussian modes

Amplitude damping of Laguerre-Gaussian modes Amplitude damping of Laguerre-Gaussian modes Angela Dudley, 1,2 Michael Nock, 2 Thomas Konrad, 2 Filippus S. Roux, 1 and Andrew Forbes 1,2,* 1 CSIR National Laser Centre, PO Box 395, Pretoria 0001, South

More information

Superpositions of the orbital angular momentum for applications in quantum experiments

Superpositions of the orbital angular momentum for applications in quantum experiments INSTITUTE OF PHYSICSPUBLISHING JOURNAL OFOPTICSB: QUANTUM ANDSEMICLASSICAL OPTICS J. Opt. B: Quantum Semiclass. Opt. 4 (00) S47 S51 PII: S1464-466(0)30337-9 Superpositions of the orbital angular momentum

More information

arxiv: v1 [physics.optics] 11 Jan 2014

arxiv: v1 [physics.optics] 11 Jan 2014 A Compact Orbital Angular Momentum Spectrometer Using Quantum Zeno Interrogation arxiv:141.2559v1 [physics.optics] 11 Jan 214 Paul Bierdz, Hui Deng* Department of Physics, University of Michigan, Ann Arbor,

More information

The efficient sorting of light s orbital angular momentum for optical communications

The efficient sorting of light s orbital angular momentum for optical communications The efficient sorting of light s orbital angular momentum for optical communications Martin P. J. Lavery a, David Robertson b, Mehul Malik c, Brandon Rodenburg c, Johannes Courtial a, Robert W. Boyd c,d,

More information

Frequency Doubling Ole Bjarlin Jensen

Frequency Doubling Ole Bjarlin Jensen Frequency Doubling Ole Bjarlin Jensen DTU Fotonik, Risø campus Technical University of Denmark, Denmark (email: ole.bjarlin.jensen@risoe.dk) Outline of the talk Quasi phase matching Schemes for frequency

More information

Quantum secure direct communication with quantum. memory

Quantum secure direct communication with quantum. memory Quantum secure direct communication with quantum memory Wei Zhang 1,3, Dong-Sheng Ding 1,3*, Yu-Bo Sheng 2, Lan Zhou 2, Bao-Sen Shi 1,3 and Guang-Can Guo 1,3 1 Key Laboratory of Quantum Information, Chinese

More information

Orbital angular momentum-enhanced measurement of rotation vibration using a Sagnac interferometer

Orbital angular momentum-enhanced measurement of rotation vibration using a Sagnac interferometer Vol. 26, No. 2 22 Jan 2018 OPTICS EXPRESS 1997 Orbital angular momentum-enhanced measurement of rotation vibration using a Sagnac interferometer Shixiong Xiao,1 Lidan Zhang,1 Dan Wei,1 Fang Liu,1 Yong

More information

Control the orbital angular momentum in third-harmonic generation using quasi-phasematching

Control the orbital angular momentum in third-harmonic generation using quasi-phasematching Vol. 6, No. 13 5 Jun 018 OPTICS EXPRESS 17563 Control the orbital angular momentum in third-harmonic generation using quasi-phasematching ZHOU XU,1 ZHONGYU LIN,1 ZHILIN YE,1 YAN CHEN,1 XIAOPENG HU,1,*

More information

Measurement of orbital angular momentum of a single photon: a noninterferrometric

Measurement of orbital angular momentum of a single photon: a noninterferrometric Measurement of orbital angular momentum of a single photon: a noninterferrometric approach R. Dasgupta and P. K. Gupta * Biomedical Applications Section, Centre for Advanced technology, Indore, Madhya

More information

Separating Laguerre-Gaussian Radial Modes Via Projective Measurements RACHEL SAMPSON

Separating Laguerre-Gaussian Radial Modes Via Projective Measurements RACHEL SAMPSON Separating Laguerre-Gaussian Radial Modes Via Projective Measurements RACHEL SAMPSON Laguerre-Gaussian (LG) Beams Cylindrically symmetric and form a basis set for paraxial light beams Properties of beams

More information

Generation of vortex beams by an image-rotating optical parametric oscillator

Generation of vortex beams by an image-rotating optical parametric oscillator Generation of vortex beams by an image-rotating optical parametric oscillator Arlee V. Smith and Darrell J. Armstrong Dept. 1118, Sandia National Laboratories, Albuquerque, NM 87185-1423 arlee.smith@osa.org

More information

arxiv: v1 [physics.optics] 14 Jun 2016

arxiv: v1 [physics.optics] 14 Jun 2016 On the Resilience of Scalar and Vector Vortex Modes in Turbulence arxiv:166.336v1 [physics.optics] 1 Jun 16 Mitchell A. Cox 1,, Carmelo Rosales-Guzmán, Martin P. J. Lavery 3, Daniel J. Versfeld 1 and Andrew

More information

Nonlinear generation of Airy vortex beam

Nonlinear generation of Airy vortex beam Vol. 6, No. 16 6 Aug 018 OPTICS EXPRESS 104 Nonlinear generation of Airy vortex beam HUI LI,1, HAIGANG LIU,1, AND XIANFENG CHEN1,,* 1 State Key Laboratory of Advanced Optical Communication Systems and

More information

Einstein-Podolsky-Rosen Entanglement between Separated. Atomic Ensembles

Einstein-Podolsky-Rosen Entanglement between Separated. Atomic Ensembles Einstein-Podolsky-Rosen Entanglement between Separated Atomic Ensembles Wei Zhang *, Ming-Xin Dong *, Dong-Sheng Ding, Shuai Shi, Kai Wang, Shi-Long Liu, Zhi-Yuan Zhou, Guang-Can Guo, Bao-Sen Shi # 1 Key

More information

Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA

Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA Research Article Vol. 1, No. 6 / December 014 / Optica 376 Adaptive-optics-based simultaneous pre- and post-turbulence compensation of multiple orbital-angular-momentum beams in a bidirectional free-space

More information

Controlled generation, manipulation and frequency conversion of broadband orbital angular momentum spectrum of asymmetric optical vortex beams

Controlled generation, manipulation and frequency conversion of broadband orbital angular momentum spectrum of asymmetric optical vortex beams Controlled generation, manipulation and frequency conversion of broadband orbital angular momentum spectrum of asymmetric optical vortex beams SABIR UL ALAM, A. SRINIVASA RAO, ANIRBAN GHOSH, PRAVIN VAITY,

More information

Creating and probing of a perfect vortex in situ with an optically trapped particle

Creating and probing of a perfect vortex in situ with an optically trapped particle Creating and probing of a perfect vortex in situ with an optically trapped particle Mingzhou Chen, Michael Mazilu, Yoshihiko Arita, Ewan M. Wright, and Kishan Dholakia, SUPA, School of Physics & Astronomy,

More information

Up-conversion imaging processing with field-of-view and edge enhancement

Up-conversion imaging processing with field-of-view and edge enhancement Up-conversion imaging processing with field-of-view and edge enhancement Shi-Kai Liu, 1,2 Shi-Long Liu, 1,2 Zhi-Yuan Zhou, 1,2,3,* Yan Li, 1,2 Yin-Hai Li, 1,2,3 Chen Yang, 1,2 Zhao-Huai Xu, 1,2 Guang-Can

More information

Supplementary Material - Quantum storage of three-dimensional orbital-angular-momentum entanglement in a crystal

Supplementary Material - Quantum storage of three-dimensional orbital-angular-momentum entanglement in a crystal Supplementary Material - Quantum storage of three-dimensional orbital-angular-momentum entanglement in a crystal Zong-Quan Zhou, 1, 2 Yi-Lin Hua, 1, 2 Xiao Liu, 1, 2 Geng Chen, 1, 2 Jin-Shi Xu, 1, 2 Yong-Jian

More information

Generation of helical modes of light by spin-to-orbital angular momentum conversion in inhomogeneous liquid crystals

Generation of helical modes of light by spin-to-orbital angular momentum conversion in inhomogeneous liquid crystals electronic-liquid Crystal Crystal Generation of helical modes of light by spin-to-orbital angular momentum conversion in inhomogeneous liquid crystals Lorenzo Marrucci Dipartimento di Scienze Fisiche Università

More information

CW-Lyman- Source for Laser Cooling of Antihydrogen in a Magnetic Trap

CW-Lyman- Source for Laser Cooling of Antihydrogen in a Magnetic Trap CW-Lyman- Source for Laser Cooling of Antihydrogen in a Magnetic Trap F. Markert, M. Scheid, D. Kolbe, A. Müllers, T. Weber, V. Neises, R. Steinborn and J. Walz Institut für Physik, Johannes Gutenberg-Universität

More information

Efficient sorting of orbital angular momentum states of light

Efficient sorting of orbital angular momentum states of light CHAPTER 6 Efficient sorting of orbital angular momentum states of light We present a method to efficiently sort orbital angular momentum (OAM) states of light using two static optical elements. The optical

More information

arxiv:quant-ph/ v2 17 Apr 2001

arxiv:quant-ph/ v2 17 Apr 2001 1 Multi dimensional Photon Entanglement of Quantum States with Phase Singularities 1 arxiv:quant-ph/0104070v2 17 Apr 2001 Alois Mair, 2 Alipasha Vaziri, Gregor Weihs, and Anton Zeilinger Institut für Experimentalphysik,

More information

Efficient frequency doubling by a phase-compensated crystal in a semimonolithic cavity

Efficient frequency doubling by a phase-compensated crystal in a semimonolithic cavity Efficient frequency doubling by a phase-compensated crystal in a semimonolithic cavity Irit Juwiler and Ady Arie In multiple-pass nonlinear frequency conversion devices, interacting waves may accumulate

More information

Orbital Angular Momentum in Noncollinear Second Harmonic Generation by off-axis vortex beams

Orbital Angular Momentum in Noncollinear Second Harmonic Generation by off-axis vortex beams Orbital Angular Momentum in Noncollinear Second Harmonic Generation by off-axis vortex beams Fabio Antonio Bovino, 1*, Matteo Braccini, Maurizio Giardina 1, Concita Sibilia 1 Quantum Optics Lab, Selex

More information

High energy X-ray vortex generation using inverse Compton scattering

High energy X-ray vortex generation using inverse Compton scattering 22nd International Spin Symposium 9/28/216 High energy X-ray vortex generation using inverse Compton scattering Yoshitaka Taira National Institute of Advanced Industrial Science and Technology (AIST),

More information

Optical vortices, angular momentum and Heisenberg s uncertainty relationship

Optical vortices, angular momentum and Heisenberg s uncertainty relationship Invited Paper Optical vortices, angular momentum and Heisenberg s uncertainty relationship Miles Padgett* Department of Physics and Astronomy, University of Glasgow, Glasgow, Scotland. G12 8QQ. ABSRACT

More information

SECOND HARMONIC GENERATION IN PERIODICALLY POLED NONLINEAR CRYSTALS WITH 1064 nm GAUSSIAN LASER PULSES

SECOND HARMONIC GENERATION IN PERIODICALLY POLED NONLINEAR CRYSTALS WITH 1064 nm GAUSSIAN LASER PULSES SECOND HARMONIC GENERATION IN PERIODICALLY POLED NONLINEAR CRYSTALS WITH 1064 nm GAUSSIAN LASER PULSES LIVIU NEAGU National Institute for Laser, Plasma and Radiation Physics, P.O. Box MG-36, 077125, Bucharest,

More information

Probing the orbital angular momentum of light with a multipoint interferometer

Probing the orbital angular momentum of light with a multipoint interferometer CHAPTER 2 Probing the orbital angular momentum of light with a multipoint interferometer We present an efficient method for probing the orbital angular momentum of optical vortices of arbitrary sizes.

More information

Fiber Gratings p. 1 Basic Concepts p. 1 Bragg Diffraction p. 2 Photosensitivity p. 3 Fabrication Techniques p. 4 Single-Beam Internal Technique p.

Fiber Gratings p. 1 Basic Concepts p. 1 Bragg Diffraction p. 2 Photosensitivity p. 3 Fabrication Techniques p. 4 Single-Beam Internal Technique p. Preface p. xiii Fiber Gratings p. 1 Basic Concepts p. 1 Bragg Diffraction p. 2 Photosensitivity p. 3 Fabrication Techniques p. 4 Single-Beam Internal Technique p. 4 Dual-Beam Holographic Technique p. 5

More information

arxiv: v2 [physics.optics] 30 Jun 2018

arxiv: v2 [physics.optics] 30 Jun 2018 Angular Lens Rishabh Sahu 1,, Swati Chaudhary 1,,#, Kedar Khare 2, Mishkatul Bhattacharya 3, Harshawardhan Wanare 1, and Anand Kumar Jha 1 1 Department of Physics, Indian Institute of Technology Kanpur,

More information

Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States

Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States Downloaded from orbit.dtu.dk on: Nov 9, 218 Continuous Variable Entanglement and Squeezing of Orbital Angular Momentum States Lassen, Mikael Østergaard; Leuchs, Gerd; Andersen, Ulrik Lund Published in:

More information

arxiv:quant-ph/ v3 21 Feb 2002

arxiv:quant-ph/ v3 21 Feb 2002 1 Entanglement of Orbital Angular Momentum States of Photons arxiv:quant-ph/0104070v3 21 Feb 2002 Alois Mair, 1 Alipasha Vaziri, Gregor Weihs, and Anton Zeilinger Institut für Experimentalphysik, Universität

More information

High efficient generation of over 1 Watt 509 nm laser beam by a ring cavity frequency doubler with periodically poled KTiOPO 4

High efficient generation of over 1 Watt 509 nm laser beam by a ring cavity frequency doubler with periodically poled KTiOPO 4 Research Article Vol. 56, No. 1 / January 1 17 / Applied Optics 55 High efficient generation of over 1 Watt 59 nm laser beam by a ring cavity frequency doubler with periodically poled KTiOPO GANG LI, 1,,

More information

Copyright 2012 OSA. Deposited on: 23 January 2013

Copyright 2012 OSA.   Deposited on: 23 January 2013 Lavery, M.P.J., Robertson, D.J., Berkhout, G.C.G., Love, G.D., Padgett, M.J., and Courtial, J. (2012) Refractive elements for the measurement of the orbital angular momentum of a single photon. Optics

More information

Cyclic transformation of orbital angular momentum modes

Cyclic transformation of orbital angular momentum modes Cyclic transformation of orbital angular momentum modes arxiv:1512.02696v1 [quant-ph] 8 Dec 2015 Florian Schlederer, 1, Mario Krenn, 1,2, Robert Fickler, 1,2, Mehul Malik, 1,2 Anton Zeilinger 1,2, 1 Institute

More information

The Gouy phase shift in nonlinear interactions of waves

The Gouy phase shift in nonlinear interactions of waves The Gouy phase shift in nonlinear interactions of waves Nico Lastzka 1 and Roman Schnabel 1 1 Institut für Gravitationsphysik, Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik

More information

arxiv: v2 [physics.optics] 22 Apr 2014

arxiv: v2 [physics.optics] 22 Apr 2014 Limitations to the determination of a Laguerre-Gauss spectrum via proective, phase-flattening measurement Hammam Qassim, Filippo M. Miatto, Juan P. Torres, Miles J. Padgett, 3 Ebrahim Karimi,, and Robert

More information

Wavelength switchable flat-top all-fiber comb filter based on a double-loop Mach-Zehnder interferometer

Wavelength switchable flat-top all-fiber comb filter based on a double-loop Mach-Zehnder interferometer Wavelength switchable flat-top all-fiber comb filter based on a double-loop Mach-Zehnder interferometer Ai-Ping Luo, Zhi-Chao Luo,, Wen-Cheng Xu,, * and Hu Cui Laboratory of Photonic Information Technology,

More information

Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges

Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges Frédéric Bouchard, Israel De Leon, Sebastian A. Schulz, Jeremy Upham, Ebrahim Karimi, and

More information

arxiv:quant-ph/ v1 5 Sep 2002

arxiv:quant-ph/ v1 5 Sep 2002 Realization of All-or-nothing-type Kochen-Specker Experiment with Single Photons Yun-Feng Huang, Chuan-Feng Li, Yong-Sheng Zhang, Jian-Wei Pan, and Guang-Can Guo Key Laboratory of Quantum Information,

More information

High-fidelity continuous-variable quantum teleportation toward multistep quantum operations

High-fidelity continuous-variable quantum teleportation toward multistep quantum operations High-fidelity continuous-variable quantum teleportation toward multistep quantum operations Mitsuyoshi Yukawa,, Hugo Benichi,,3 and Akira Furusawa, Department of Applied Physics, School of Engineering,

More information

Title Experimental long-distance quantum secure direct communication

Title Experimental long-distance quantum secure direct communication Title Experimental long-distance quantum secure direct communication The authors Feng Zhu, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua

More information

EFFECT OF A THIN OPTICAL KERR MEDIUM ON A LAGUERRE-GAUSSIAN BEAM AND THE APPLICATIONS WEIYA ZHANG

EFFECT OF A THIN OPTICAL KERR MEDIUM ON A LAGUERRE-GAUSSIAN BEAM AND THE APPLICATIONS WEIYA ZHANG EFFECT OF A THIN OPTICAL KERR MEDIUM ON A LAGUERRE-GAUSSIAN BEAM AND THE APPLICATIONS By WEIYA ZHANG A dissertation submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY

More information

The Two-Photon State Generated by Spontaneous Parametric Down-Conversion. C. H. Monken and A. G. da Costa Moura

The Two-Photon State Generated by Spontaneous Parametric Down-Conversion. C. H. Monken and A. G. da Costa Moura The Two-Photon State Generated by C. H. Monken and A. G. da Costa Moura Universidade Federal de Minas Gerais Brazil Funding C A P E S Conselho Nacional de Desenvolvimento Científico e Tecnológico Instituto

More information

Title. Authors and Affiliations. Abstract. Introduction. Twisted Radio Waves and Twisted Thermodynamics

Title. Authors and Affiliations. Abstract. Introduction. Twisted Radio Waves and Twisted Thermodynamics Title Twisted Radio Waves and Twisted Thermodynamics Authors and Affiliations L.B. Kish corresponding author Solid State Electronics, Photonics, and Nanoengineering Division, Department of Electrical and

More information

Quantum Key Distribution in a High-Dimensional State Space: Exploiting the Transverse Degree of Freedom of the Photon

Quantum Key Distribution in a High-Dimensional State Space: Exploiting the Transverse Degree of Freedom of the Photon Invited Paper Quantum Key Distribution in a High-Dimensional State Space: Exploiting the Transverse Degree of Freedom of the Photon Robert W. Boyd The Institute of Optics and Department of Physics and

More information

Copyright 2014 Optical Society of America. Deposited on: 21 May 2014

Copyright 2014 Optical Society of America.   Deposited on: 21 May 2014 Radwell, N., Brickus, D., Clark, T.W., and Franke-Arnold, S. (2014) High speed switching between arbitrary spatial light profiles.optics Express, 22 (11). pp. 12845-12852. ISSN 1094-4087 Copyright 2014

More information

A Guide to Experiments in Quantum Optics

A Guide to Experiments in Quantum Optics Hans-A. Bachor and Timothy C. Ralph A Guide to Experiments in Quantum Optics Second, Revised and Enlarged Edition WILEY- VCH WILEY-VCH Verlag CmbH Co. KGaA Contents Preface 1 Introduction 1.1 Historical

More information

arxiv: v2 [quant-ph] 4 Jun 2012

arxiv: v2 [quant-ph] 4 Jun 2012 Influence of atmospheric turbulence on optical communications using orbital angular momentum for encoding arxiv:124.5781v2 [quant-ph] 4 Jun 212 Mehul Malik, 1, Malcolm O Sullivan, 1 Brandon Rodenburg,

More information

Squeezed states of light - generation and applications

Squeezed states of light - generation and applications Squeezed states of light - generation and applications Eugeniy E. Mikhailov The College of William & Mary Fudan, December 24, 2013 Eugeniy E. Mikhailov (W&M) Squeezed light Fudan, December 24, 2013 1 /

More information

PHY3902 PHY3904. Photon Entanglement. Laboratory protocol

PHY3902 PHY3904. Photon Entanglement. Laboratory protocol HY390 HY390 hoton ntanglement Laboratory protocol Goals. Learn how to create and detect pairs of photons entangled in polarization.. Test the lauser Horne Shimony and Holt version of the Bell inequality

More information

Survival of the orbital angular momentum of light through an extraordinary optical transmission process in the paraxial approximation

Survival of the orbital angular momentum of light through an extraordinary optical transmission process in the paraxial approximation Survival of the orbital angular momentum of light through an extraordinary optical transmission process in the paraxial approximation Dunzhao Wei, 1 Yang Wu, 1 Yongmei Wang, 1 Dongmei Liu, 1 Yunzhi Zhu,

More information

As a partial differential equation, the Helmholtz equation does not lend itself easily to analytical

As a partial differential equation, the Helmholtz equation does not lend itself easily to analytical Aaron Rury Research Prospectus 21.6.2009 Introduction: The Helmhlotz equation, ( 2 +k 2 )u(r)=0 1, serves as the basis for much of optical physics. As a partial differential equation, the Helmholtz equation

More information

arxiv: v1 [quant-ph] 5 May 2016

arxiv: v1 [quant-ph] 5 May 2016 Narrow band amplification of light carrying orbital angular momentum arxiv:1605.01764v1 [quant-ph] 5 May 2016 G. C. Borba 1, S. Barreiro 1,3 L. Pruvost 2, D. Felinto 1, and J. W. R. Tabosa 1, 1 Departamento

More information

Determination of blue-lightinduced infrared absorption based on mode-matching efficiency in an optical parametric oscillator

Determination of blue-lightinduced infrared absorption based on mode-matching efficiency in an optical parametric oscillator www.nature.com/scientificreports OPEN received: 5 August 06 accepted: 0 December 06 Published: 0 February 07 Determination of blue-lightinduced infrared absorption based on mode-matching efficiency in

More information

Timeline: Bohm (1951) EPR (1935) CHSH (1969) Bell (1964) Theory. Freedman Clauser (1972) Aspect (1982) Weihs (1998) Weinland (2001) Zeilinger (2010)

Timeline: Bohm (1951) EPR (1935) CHSH (1969) Bell (1964) Theory. Freedman Clauser (1972) Aspect (1982) Weihs (1998) Weinland (2001) Zeilinger (2010) 1.EPR paradox 2.Bohm s version of EPR with spin ½ particles 3.Entangled states and production 4.Derivation of CHSH inequality - S parameter for mixed and entangled state 5. Loopholes 6.Experiments confirming

More information

Optical twists in phase and amplitude

Optical twists in phase and amplitude Downloaded from orbit.dtu.dk on: Jan 13, 2019 Optical twists in phase and amplitude Daria, Vincent R.; Palima, Darwin; Glückstad, Jesper Published in: Optics Express Link to article, DOI: 10.1364/OE.19.000476

More information

GENERATION OF POLARIZATION ENTANGLED PHOTON PAIRS IN AlGaAs BRAGG REFLECTION WAVEGUIDES

GENERATION OF POLARIZATION ENTANGLED PHOTON PAIRS IN AlGaAs BRAGG REFLECTION WAVEGUIDES MSc in Photonics Universitat Politècnica de Catalunya (UPC) Universitat Autònoma de Barcelona (UAB) Universitat de Barcelona (UB) Institut de Ciències Fotòniques (ICFO) PHOTONICSBCN http://www.photonicsbcn.eu

More information

Quantum optics and squeezed states of light

Quantum optics and squeezed states of light Quantum optics and squeezed states of light Eugeniy E. Mikhailov The College of William & Mary June 15, 2012 Eugeniy E. Mikhailov (W&M) Quantum optics June 15, 2012 1 / 44 From ray optics to semiclassical

More information

arxiv: v1 [physics.optics] 1 Dec 2007

arxiv: v1 [physics.optics] 1 Dec 2007 Pancharatnam-Berry phase optical elements for wavefront shaping in the visible domain: switchable helical modes generation L. Marrucci, C. Manzo, and D. Paparo CNR-INFM Coherentia and Dipartimento di Scienze

More information

Novel Detection of Optical Orbital Angular Momentum

Novel Detection of Optical Orbital Angular Momentum AFRL-RD-PS- AFRL-RD-PS TR-2014-0045 TR-2014-0045 Novel Detection of Optical Orbital Angular Momentum David Voelz Klipsch School of ECE New Mexico State University MSC 3-O, PO Box 30001 Las Cruces, NM 88003

More information

arxiv: v1 [physics.optics] 12 Feb 2013

arxiv: v1 [physics.optics] 12 Feb 2013 Characterization of a Quantum Light Source Based on Spontaneous Parametric Down-Conversion Thomas J. Huisman, Simon R. Huisman, Allard P. Mosk, Pepijn W.H. Pinkse MESA+ Institute for Nanotechnology, University

More information

Comparing quantum and classical correlations in a quantum eraser

Comparing quantum and classical correlations in a quantum eraser Comparing quantum and classical correlations in a quantum eraser A. Gogo, W. D. Snyder, and M. Beck* Department of Physics, Whitman College, Walla Walla, Washington 99362, USA Received 14 February 2005;

More information

Hong-Ou-Mandel effect with matter waves

Hong-Ou-Mandel effect with matter waves Hong-Ou-Mandel effect with matter waves R. Lopes, A. Imanaliev, A. Aspect, M. Cheneau, DB, C. I. Westbrook Laboratoire Charles Fabry, Institut d Optique, CNRS, Univ Paris-Sud Progresses in quantum information

More information

Multi-cycle THz pulse generation in poled lithium niobate crystals

Multi-cycle THz pulse generation in poled lithium niobate crystals Laser Focus World April 2005 issue (pp. 67-72). Multi-cycle THz pulse generation in poled lithium niobate crystals Yun-Shik Lee and Theodore B. Norris Yun-Shik Lee is an assistant professor of physics

More information

Making and identifying optical superposition of very high orbital angular momenta

Making and identifying optical superposition of very high orbital angular momenta Making and identifying optical superposition of very high orbital angular momenta Lixiang Chen*, Wuhong Zhang, Qinghong Lu, and Xinyang Lin Department of Physics and Laboratory of anoscale Condensed Matter

More information

Application of orbital angular momentum to simultaneous determination of tilt and lateral displacement of a misaligned laser beam

Application of orbital angular momentum to simultaneous determination of tilt and lateral displacement of a misaligned laser beam Lin et al. Vol. 7, No. 10/October 010/J. Opt. Soc. Am. A 337 Application of orbital angular momentum to simultaneous determination of tilt and lateral displacement of a misaligned laser beam J. Lin, 1,

More information

Enhanced optical communication and broadband sub-shot-noise interferometry with a stable free-running periodically poled KTiOPO 4 squeezer

Enhanced optical communication and broadband sub-shot-noise interferometry with a stable free-running periodically poled KTiOPO 4 squeezer 2702 J. Opt. Soc. Am. B/ Vol. 24, No. 10/ October 2007 Xie et al. Enhanced optical communication and broadband sub-shot-noise interferometry with a stable free-running periodically poled KTiOPO 4 squeezer

More information

Light orbital angular momentum and laser beam characterization

Light orbital angular momentum and laser beam characterization Light orbital angular momentum and laser beam characterization Julio Serna azul@fis.ucm.es INDLAS 013. 0 4 May 013 Bran, Romania Mini Symposium/Workshop on Laser Induced Damage and Laser Beam Characterization

More information

by applying two pairs of confocal cylindrical lenses

by applying two pairs of confocal cylindrical lenses Title:Design of optical circulators with a small-aperture Faraday rotator by applying two pairs of confocal Author(s): Yung Hsu Class: 2nd year of Department of Photonics Student ID: M0100579 Course: Master

More information

Imaging Spatial-Helical Mode Interference of Single Photons

Imaging Spatial-Helical Mode Interference of Single Photons Imaging Spatial-Helical Mode Interference of Single Photons E.J. Galvez, E. Johnson, B.J. Reschovsky, L.E. Coyle, and A. Shah Department of Physics and Astronomy, Colgate University, 13 Oak Drive, Hamilton,

More information

1. Introduction. 2. New approaches

1. Introduction. 2. New approaches New Approaches To An Indium Ion Optical Frequency Standard Kazuhiro HAYASAKA National Institute of Information and Communications Technology(NICT) e-mail:hayasaka@nict.go.jp ECTI200 . Introduction Outline

More information

Quantum Photonic Integrated Circuits

Quantum Photonic Integrated Circuits Quantum Photonic Integrated Circuits IHFG Hauptseminar: Nanooptik und Nanophotonik Supervisor: Prof. Dr. Peter Michler 14.07.2016 Motivation and Contents 1 Quantum Computer Basics and Materials Photon

More information

arxiv:quant-ph/ v1 1 Jun 2000

arxiv:quant-ph/ v1 1 Jun 2000 Probabilistic teleportation of two-particle entangled state Bao-Sen Shi, Yun-Kun Jiang and Guang-Can Guo Lab. of Quantum Communication and Quantum Computation Department of Physics University of Science

More information

arxiv: v2 [physics.optics] 18 Sep 2012

arxiv: v2 [physics.optics] 18 Sep 2012 Position measurement of non-integer OAM beams with structurally invariant propagation arxiv:127.619v2 [physics.optics] 18 Sep 212 A. M. Nugrowati, W. G. Stam and J. P. Woerdman Huygens Laboratory, Leiden

More information

Generation of narrow-band polarization-entangled photon pairs at a. rubidium D1 line

Generation of narrow-band polarization-entangled photon pairs at a. rubidium D1 line Generation of narrow-band polarization-entangled photon pairs at a rubidium D1 line Long Tian ( 田龙 ), Shu-Jing Li ( 李淑静 ), Hao-Xiang Yuan ( 原浩翔 ) and Hai Wang ( 王海 ) The State Key Laboratory of Quantum

More information

Observing the Doppler Absorption of Rubidium Using a Tunable Laser Diode System

Observing the Doppler Absorption of Rubidium Using a Tunable Laser Diode System Observing the Doppler Absorption of Rubidium Using a Tunable Laser Diode System Ryan Prenger 5/5/00 Final Submission Purdue University Physics Department Abstract Using a tunable laser diode, Doppler absorption

More information

An alternative method to specify the degree of resonator stability

An alternative method to specify the degree of resonator stability PRAMANA c Indian Academy of Sciences Vol. 68, No. 4 journal of April 2007 physics pp. 571 580 An alternative method to specify the degree of resonator stability JOGY GEORGE, K RANGANATHAN and T P S NATHAN

More information

Noise Correlations in Dual Frequency VECSEL

Noise Correlations in Dual Frequency VECSEL Noise Correlations in Dual Frequency VECSEL S. De, A. El Amili, F. Bretenaker Laboratoire Aimé Cotton, CNRS, Orsay, France V. Pal, R. Ghosh Jawaharlal Nehru University, Delhi, India M. Alouini Institut

More information

Quantum information processing. Two become one

Quantum information processing. Two become one Quantum information processing Two become one Scientists experimentally demonstrate a scheme for quantum joining, which allow the number of qubits encoded per photon to be varied while keeping the overall

More information

Measurement of the orbital angular momentum density of Bessel beams by projection into a Laguerre Gaussian basis

Measurement of the orbital angular momentum density of Bessel beams by projection into a Laguerre Gaussian basis Measurement of the orbital angular momentum density of Bessel beams by projection into a Laguerre Gaussian basis Christian Schulze, 1, * Angela Dudley, 2 Robert Brüning, 1 Michael Duparré, 1 and Andrew

More information