Approximate Performance Study of Non-Line-of- Sight Ultraviolet Communication Links in Noncoplanar Geometry
|
|
- Jemimah Wright
- 6 years ago
- Views:
Transcription
1 01 7th International ICS Conference on Communications and Networking in China (CHINACOM) Approximate Performance Study of Non-Line-of- Sight Ultraviolet Communication Links in Noncoplanar Geometry Yong Zuo, Houfei Xiao, Wenbo Zhang, Haoran Xu, Jian Wu State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and elecommunications Beijing, China Abstract his paper presents an approximate closed-form model of non-line-of-sight (NLOS) ultraviolet (UV) singlescatter propagation in noncoplanar geometry for tractable analysis. he path loss is given as a function of the transceiver geometry settings and the optical properties of the atmosphere. Numerical examples on path loss show that the approximate model is consistent with the integral-form noncoplanar propagation model. hen, the data rate and the channel capacity of a quantum-limited receiver are further investigated with different parameters, such as bit error rate (BE), communication range, and transmitter optical power and offaxis angle. Keywords-ultraviolet communication; non-line-of-sight; single-scatter I. INODUCION Optical wireless communication systems can be arranged in a number of configurations depending on the specific requirements [1]. he line-of-sight (LOS) optical wireless communication system, in which the transmitter (x) and the receiver (x) are in direct view without any object obstructing the path between them, is constrained by difficult alignment of the x and the x. he non-line-of-sight (NLOS) ultraviolet (UV) communication, on the other hand, is proposed as a new type of atmospheric optical communication technology with some important and potential advantages, and can be considered an effective supplement to conventional communications. In recent years, some NLOS UV communication link models have been developed. A NLOS single-scatter propagation model based on the prolate-spheroidal coordinate system was developed by eilly et al. [,3], and some approximate channel models in [4-6] extended it by means of closed-from expressions for tractable analysis. Based on extensive measurements at the 60 nm wavelength, an empirical channel path loss model was presented in [7]. All the above models considered the same case where the x beam and the x field-of-view (FOV) have coplanar axes. In recent literature [8,9], the models for noncoplanar geometries were investigated. eference [8] considered the special case of vertical x and arbitrary x orientation. he work in [9] proposed a propagation model to describe the path loss, where the x and x cone axes can be pointed in arbitrary directions. Some papers already analyzed the performance of NLOS UV links in terms of signal-to-noise ratio (SN) and bit error rate (BE) of the x for noncoplanar geometries [4,5,7,10,11]. In this paper, an approximate closed-form model is developed in noncoplanar geometry by considering the case of vertical x pointing and small scattering volume. his approximate model is compared with the integral-form model in [8] by numerical examples, which shows a good agreement. hen, the data rate and channel capacity performances for a quantum-limited x are derived to show trade-offs in BE, communication range, and x optical power and off-axis angle. Without integral computations, this model makes performance analysis of NLOS UV communication links much more convenient and can provide guidelines for field experiments. II. NLOS SINGLE-SCAE LINK he geometry sketch of NLOS UV single-scatter propagation is shown in Fig. 1. A x at point has the beam angle, the apex angle, and the off-axis angle which equals the angle between the transceiver baseline and the projection of the x beam axis onto the ground. A x with FOV is located at point. he x apex angle is 90º. An emitted ray C intersects the FOV boundary twice by the entrance point B and the departure point A. Figure 1. Sketch of NLOS UV single-scatter communication /1/$ IEEE
2 Following the propagation theory in [], the energy per unit area scattered from the differential volume V and received by the x can be calculated by E Pk cos( )exp[ k ( rr)] P( ) V, s e 1 S 4 rr 1 where [1 cos( / )] is the x solid cone angle, is the angle between the x FOV axis and the direction from the x to the scattering volume V, E is the beam energy, S is the angle between the forward direction of C and the scattering direction, P( S ) is the single-scatter phase function, ks and k e are the atmospheric scattering coefficient and extinction coefficient, r 1 and r are the distances of the differential volume V to the x and the x, respectively. In Fig. 1, denote the length of A as l. By applying the cosine rule and laws of trigonometry to some triangles, we have [cos sin tan ( / )] l rlcoscos r 0. (1) () Its two roots are cos cos sin tan ( / ) cos sin min,max r cos sin tan ( / ) l, where l max A and l min B correspond to the + and terms, respectively. For a small LED beam width, the common volume of the x beam and the x FOV can be well approximated by a cylinder with volume V D h, where h lmax lmin and D ( lmax lmin ) /4 are the height and the underside radius of the cylinder, respectively. When the scattering volume V is small, we can assume approximates zero, such that r 1 ( l max l min )/. eferring to [8], we obtain r r[ r l l sin ( ) / cos ( / )] ( r / l 1) r, 1 1 min min 1 min s arccos[( r r1 r ) / ( rr 1 )]. herefore, the total energy received by the x with detection area A is E E A k rr P( ) sin tan ( / ) cos sin. 16 [1 cos( / )][cos sin tan ( / )]exp[ ( )] s S ke r1 r (3) his closed-form expression can give well approximate results, which will be verified in the following. So it is useful for analyzing link performances and designing UV communication systems. III. NUMEICAL EXAMPLES We first characterize the path loss with different system geometric parameters, and then further study the data rate and the channel capacity Path Loss(dB) Standard model: Analytical model: Standard model: Analytical model: Standard model: =8 o Analytical model: =8 o A. Path loss he analytical model is validated by the integral-form single-scatter path loss model [8] (called standard model in this paper) in noncoplanar geometry regardless of turbulence. he model parameters are chosen as in [8], and the fixed geometric parameters are set as (,, ) (90, 30,10 ). he simulation results of (3) are shown in Fig. -4, demonstrating that this analytical model is fairly consistent with the standard model. he path loss (defined by E E ) gradually increases along with the range r varying from 1m to 0m or the increase of. hese results indicate that the proposed approximate model can make a good prediction about link performances for the cases of the short baseline range and the small scattering volume. Path Loss(dB) Figure. Path loss (per cm) ( 30). Standard model: Analytical model: Standard model: Analytical model: Standard model: Analytical model: Standard model: Analytical model: Figure 3. Path loss (per cm) ( 45). 97
3 Path Loss(dB) Standard model: Analytical model: Standard model: =16 o Analytical model: =16 o Standard model: =5 o Analytical model: =5 o relatively little. When is larger than 10º, the data rate starts to decrease fast. he effect of P on the data rate are presented in Fig. 7 while 0 and BE is While P increases by a factor of ten, the data rate increases by the same factor B. Data rate Figure 4. Path loss (per cm) ( 60 ). Each photon carries energy hc /, where c is the speed of light, is the wavelength, and h is the Planck s constant. So the average number of emitted photons generated by the signal per pulse is N P /( hc), where P is the x emission power and is the data rate. hen, the average number of photons delivered to the x per pulse is N P / ( Lhc), where L N / N is the path loss. Assume the x is a solar blind filter in series with a photomultiplier tube (PM), f is the filter transmission, r and M are the PM quantum efficiency and gain, respectively. hen the average number of detected signal photoelectrons per bit is expressed by NS M frp/( Lhc). For direct detection by a quantumlimited on-off keying (OOK) modulation system, the BE is given by [1,13] PM fr BE exp. (4) L( hc / ) For Hamamastu PM 6834, the diameter of effective sensing window is 5mm, resulting in an active detection area of 4.9cm. he PM quantum efficiency is given by r ( S ) / %, where S is the radiant sensitivity 3 in A/W at the given wavelength. For 6834, S 810 A/W, so the quantum efficiency approximated 13.7% at 54nm. he 5 gain of 6834 is M We assume 0.1. Fig. 5 demonstrates the data rate-range-be performance while P 1 mw and 0. For the BE requirements of 10-3 (voice service) and 10-6 (data service), the corresponding data rates can approach Mbit/s and 40Mbit/s for the range of 10m, and drop to 6Mbit/s and 3Mbit/s for m, respectively. Fig. 6 shows the effect of on the data rate while 6 P 1mW and the BE = 10. It can be seen that due to the reduced scattering volume, the data rate decreases as increases. he data rate decreases slowly along with varying from 0º to 10º, since the scattering volume changes f BE=10-3 BE=10-4 BE=10-5 BE=10-6 Figure 5. Data rate, range, and BE trade-offs Figure 6. Data rate, range, and 0 trade-offs. P =0.5 mw P =5 mw P =50 mw Figure 7. Data rate, range, and x power trade-offs. C. Channel capacity he nature of the UV channel is governed by the properties of atmospheric gases, resulting in the variety of the channel capacity. We assume the atmospheric channel is an additive white Gaussian noise (AWGN) channel. he channel capacity can be defined as the maximum amount of information. Based 98
4 on Shannon theory [14], the capacity ( bit/s ) of the AWGN channel with the channel bandwidth B and SN is: C Blog (1 SN), (5) where the quantum-limited SN [13] can be described by SN P / ( hcbl). (6) f r After some algebraic manipulations, we can have P hcbl P C log (1 ) hcl P hcl. (7) f r f r f r When the bandwidth B approaches infinite, we can find frp hcbl frp lim C lim log (1 ) B hcl B f rp hcl (8) f rp f rp log e hcl hcl Assume that the data rate equals the bandwidth B. hen, the channel capacity will not increases to infinite but tends to a certain value while the data rate approaches infinite, as shown in Fig. 8. his figure demonstrates the channel capacity-rangedata rate performance for P 1 mw and 0. In the short-range NLOS UV communication, the increasing rate of the channel capacity will decline as the data rate increases. he channel capacity always deceases as the range becomes longer Data rate=10 (bit/s) Data rate= (bit/s) Data rate= (bit/s) Data rate=infinite Figure 8. Channel capacity, range, and data rate trade-offs. Fig. 9 shows the effect of on the channel capacity while P 1mW and the data rate is bit/s. It can be seen that due to the reduced scattering volume, the channel capacity deceases as increases. he channel capacity decreases slowly along with varying from 0º to 10º, and then decreases fast when becomes larger. he effect of P on the channel capacity is presented in Fig. 10 while 0 and the data rate is bit/s. It can be seen that the channel capacity is sensitive to P. As P increases, more energy is received, and the channel capacity increases. At present, the radiated optical power levels of a deep UV LED is in the mw ranges [15]. In order to further increase the total emission power, an array of UV LEDs [5,7,10] were used to achieve better performances, such as the data rate and the channel capacity Figure 9. Channel capacity, range, and 10 P =0.5 mw trade-offs P =5 mw P =50 mw Figure 10. Channel capacity, range, and x power trade-offs. IV. CONCLUSIONS In this paper, an approximate closed-form model of NLOS single-scatter propagation is presented for noncoplanar geometry, which is tractable for path loss analysis. Numerical examples show that the approximate model agrees with the integral-form model in [8]. he data rate and the channel capacity are also studied for various system parameters. Our numerical results indicate that these performances are affected by the x emission power, the transceiver geometry parameters, and the properties of the x (e.g., quantum efficiency, gain and detection area). Without integral computations, this model makes performance evaluations much more convenient. Our future work will apply this model to UV mobile ad hoc network simulations and provide guidelines for UV communication system design. ACKNOWLEDGMEN his work was supported by the Fundamental esearch Funds for the Central Universities 01. EFEENCES [1].. Iniguez, S. M. Idrus, Z. Sun, Optical wireless communications: I for wireless connectivity, CC Press, 008, pp
5 [] M.. Luettgen, J. H. Shapiro, and D. M. eilly, Non-line-of-sight single-scatter propagation model, J. Opt. Soc. Am. A, vol. 8, pp , [3] D. M. eilly and C. Warde, emporal characteristics of single-scatter radiation, J. Opt. Soc. Am., vol. 69, pp , [4] Z. Xu, Approximate performance analysis of wireless ultraviolet links, in Proc. IEEE Intl. Conf. on Acoustics, Speech, and Signal Proc., vol. 3, pp , April 007. [5] Z. Xu, H. Ding, B. M. Scadler, and G. Chen, Analytical performance study of solar blind non-line-of-sight ultraviolet short-range communication links, Opt. Lett., vol. 33, pp , 008. [6] H. Yin, S. Chang, X. Wang, J. Yang, J. Yang, and J. an, Analytical model of non-line-of-sight single-scatter propagation, J. Opt. Soc. Am. A, vol. 7, pp , 010. [7] G. chen, Z. Xu, H. Ding, and B. M. Scadler, Path loss modeling and performance trade-off study for short-range non-line-of-sight ultraviolet communications, Opt. Express, vol. 17, pp , 009. [8] L. Wang, Z. Xu, and B. M. Sadler, Non-line-of-sight ultraviolet link loss in noncoplanar geometry, Opt. Lett., vol. 35, pp , 010. [9] H. Xiao, Y. Zuo, J. Wu, H. Guo, and J. Lin, Non-line-of-sight ultraviolet single-scatter propagation model, Opt. Express, vol. 19, pp , 011. [10] G. Chen, F. Abou-Galala, Z. Xu, and B. M. Sadler, Experimental evaluation of LED-based solar blind NLOS communication links, Opt. Express, vol. 16, pp , 008. [11] D. Kedar and S. Arnon, Non-line-of-sight optical wireless sensor network operating in multiscattering channel, Appl. Opt., vol. 45, no. 33, pp , 006. [1] William K. Pratt, Laser Communication Systems, John Wiley, NY, 1969, pp [13] Joseph C. Palais, Fiber Optic Communications, 5th ed., New Jersey, 005, Chap. 11, pp [14] J. Zhou, Q. Pang, D. Xu, W. Wu, Communication heory, Bei Jing, 005, Chap. 8, pp [15] M. Kneissl,. Kolbe, C. Chua, V. Kuller, N. Lobo, et al., Advances in group III-nitride-based deep UV light-emitting diode technology, Semiconductor Science & echnology, vol. 6, no. 1: 036,
Stray light analysis of an on-axis three-reflection space optical system
June 10, 2010 / Vol. 8, No. 6 / CHINESE OPTICS LETTERS 569 Stray light analysis of an on-axis three-reflection space optical system Baolin Du ( ), Lin Li ( ), and Yifan Huang ( ) School of Optoelectronics,
More informationDouble-distance propagation of Gaussian beams passing through a tilted cat-eye optical lens in a turbulent atmosphere
Double-distance propagation of Gaussian beams passing through a tilted cat-eye optical lens in a turbulent atmosphere Zhao Yan-Zhong( ), Sun Hua-Yan( ), and Song Feng-Hua( ) Department of Photoelectric
More informationLecture 11: Doppler wind lidar
Lecture 11: Doppler wind lidar Why do we study winds? v Winds are the most important variable studying dynamics and transport in the atmosphere. v Wind measurements are critical to improvement of numerical
More informationOptical time-domain differentiation based on intensive differential group delay
Optical time-domain differentiation based on intensive differential group delay Li Zheng-Yong( ), Yu Xiang-Zhi( ), and Wu Chong-Qing( ) Key Laboratory of Luminescence and Optical Information of the Ministry
More informationApplication of high-precision temperature-controlled FBG f ilter and light source self-calibration technique in the BOTDR sensor system
Application of high-precision temperature-controlled FBG f ilter and light source self-calibration technique in the BOTDR sensor system Jiacheng Hu ( ) 1,2, Fuchang Chen ( ) 1,2, Chengtao Zhang ( ) 1,2,
More informationMEASUREMENT of gain from amplified spontaneous
IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 40, NO. 2, FEBRUARY 2004 123 Fourier Series Expansion Method for Gain Measurement From Amplified Spontaneous Emission Spectra of Fabry Pérot Semiconductor Lasers
More informationFree Space Optical (FSO) Communications. Towards the Speeds of Wireline Networks
Free Space Optical (FSO) Communications Towards the Speeds of Wireline Networks FSO Basic Principle Connects using narrow beams two optical wireless transceivers in line-of-sight. Light is transmitted
More informationIntroduction to Photovoltaics
INTRODUCTION Objectives Understand the photovoltaic effect. Understand the properties of light. Describe frequency and wavelength. Understand the factors that determine available light energy. Use software
More informationAnalysis of second-harmonic generation microscopy under refractive index mismatch
Vol 16 No 11, November 27 c 27 Chin. Phys. Soc. 19-1963/27/16(11/3285-5 Chinese Physics and IOP Publishing Ltd Analysis of second-harmonic generation microscopy under refractive index mismatch Wang Xiang-Hui(
More informationLong- and short-term average intensity for multi-gaussian beam with a common axis in turbulence
Chin. Phys. B Vol. 0, No. 1 011) 01407 Long- and short-term average intensity for multi-gaussian beam with a common axis in turbulence Chu Xiu-Xiang ) College of Sciences, Zhejiang Agriculture and Forestry
More informationPropagation of Lorentz Gaussian Beams in Strongly Nonlocal Nonlinear Media
Commun. Theor. Phys. 6 04 4 45 Vol. 6, No., February, 04 Propagation of Lorentz Gaussian Beams in Strongly Nonlocal Nonlinear Media A. Keshavarz and G. Honarasa Department of Physics, Faculty of Science,
More informationMaking Method of the Data Processing System in the Experiment of. the Planck Constant Measuring with Photoelectric Effect
Making Method of the Data Processing System in the Experiment of the Planck Constant Measuring with Photoelectric Effect JIANG Xing-fang 1), LIYan-ji 1), JIANG Hong 2) 1)School of Mathematics & Physics,
More informationBu Ren an, Song Mingdong *, Wang Zhongrui, Jin Jing, Hu Wenbo, Qiu Feng, Wang Wenjiang, Zhang Jintao
Available online at www.sciencedirect.com Physics Procedia 32 (2012 ) 477 481 18 th International Vacuum Congress Development of 146nm Vacuum UV Light Source Bu Ren an, Song Mingdong *, Wang Zhongrui,
More informationA COMPACT PI-STRUCTURE DUAL BAND TRANSFORMER
Progress In Electromagnetics Research, PIER 88, 121 134, 2008 A COMPACT PI-STRUCTURE DUAL BAND TRANSFORMER Y. Wu, Y. Liu, and S. Li School of Electronic Engineering Beijing University of Posts and Telecommunications
More informationChapter 2 Problem Solutions
Chapter Problem Solutions 1. If Planck's constant were smaller than it is, would quantum phenomena be more or less conspicuous than they are now? Planck s constant gives a measure of the energy at which
More informationBER CHARACTERISTICS ANALYSIS OF ATMOSPHERE LASER PROPAGATION IN A VARIETY OF WEATHER FACTORS. Received March 2013; revised December 2013
International Journal of Innovative Computing, Information and Control ICIC International c 2014 ISSN 1349-4198 Volume 10, Number 4, August 2014 pp. 1447 1455 BER CHARACTERISTICS ANALYSIS OF ATMOSPHERE
More informationHYDROBETA: A NEW INSTRUMENT FOR MEASURING IN-SITU PROFILES OF THE VOLUME SCATTERING FUNCTION FROM 10 TO 170 DEGREES
HYDROBETA: A NEW INSTRUMENT FOR MEASURING IN-SITU PROFILES OF THE VOLUME SCATTERING FUNCTION FROM 10 TO 170 DEGREES David R. Dana, Robert A. Maffione Hydro-Optics, Biology and Instrumentation Laboratories,
More informationChemometric Approach to the Calibration of Light Emitting Diode Based Optical Gas Sensors Using High-Resolution Transmission Molecular Absorption Data
Electronic Supplementary Information Chemometric Approach to the Calibration of Light Emitting Diode Based Optical Gas Sensors Using High-Resolution Transmission Molecular Absorption Data Parvez Mahbub
More informationLecture 16 Light transmission and optical detectors
Lecture 6 Light transmission and optical detectors Charged particle traversing through a material can generate signal in form of light via electromagnetic interactions with orbital electrons of the atoms
More information4 FEL Physics. Technical Synopsis
4 FEL Physics Technical Synopsis This chapter presents an introduction to the Free Electron Laser (FEL) physics and the general requirements on the electron beam parameters in order to support FEL lasing
More informationRemote Sensing Systems Overview
Remote Sensing Systems Overview Remote Sensing = Measuring without touching Class objectives: Learn principles for system-level understanding and analysis of electro-magnetic remote sensing instruments
More informationDevelopment and application for X-ray excited optical luminescence (XEOL) technology at STXM beamline of SSRF
Development and application for X-ray excited optical luminescence (XEOL) technology at STXM beamline of SSRF Content Introduction to XEOL Application of XEOL Development and Application of XEOL in STXM
More informationLecture 2. Fading Channel
1 Lecture 2. Fading Channel Characteristics of Fading Channels Modeling of Fading Channels Discrete-time Input/Output Model 2 Radio Propagation in Free Space Speed: c = 299,792,458 m/s Isotropic Received
More informationDetection of X-Rays. Solid state detectors Proportional counters Microcalorimeters Detector characteristics
Detection of X-Rays Solid state detectors Proportional counters Microcalorimeters Detector characteristics Solid State X-ray Detectors X-ray interacts in material to produce photoelectrons which are collected
More informationScattering of light from quasi-homogeneous sources by quasi-homogeneous media
Visser et al. Vol. 23, No. 7/July 2006/J. Opt. Soc. Am. A 1631 Scattering of light from quasi-homogeneous sources by quasi-homogeneous media Taco D. Visser* Department of Physics and Astronomy, University
More informationUpper and Lower Bounds on the Capacity of Wireless Optical Intensity Channels Corrupted by Gaussian Noise
S BIENNIAL SYPOSIU ON COUNICAIONS, QUEEN S UNIVERSIY, KINGSON, ON, CANADA, JUNE 5,. Upper and Lower Bounds on the Capacity of Wireless Optical Intensity Channels Corrupted by Gaussian Noise Steve Hranilovic
More informationMidsummer Examinations 2016
4313.1 All candidates Midsummer Examinations 2016 Blackboard version with numerical answers DO NOT OPEN THE QUESTION PAPER UNTIL INSTRUCTED TO DO SO BY THE CHIEF INVIGILATOR Department PHYSICS AND ASTRONOMY
More informationTHE OBSERVATION AND ANALYSIS OF STELLAR PHOTOSPHERES
THE OBSERVATION AND ANALYSIS OF STELLAR PHOTOSPHERES DAVID F. GRAY University of Western Ontario, London, Ontario, Canada CAMBRIDGE UNIVERSITY PRESS Contents Preface to the first edition Preface to the
More informationOptics, Light and Lasers
Dieter Meschede Optics, Light and Lasers The Practical Approach to Modern Aspects of Photonics and Laser Physics Second, Revised and Enlarged Edition BICENTENNIAL.... n 4 '':- t' 1 8 0 7 $W1LEY 2007 tri
More informationVisualization of Xe and Sn Atoms Generated from Laser-Produced Plasma for EUV Light Source
3rd International EUVL Symposium NOVEMBER 1-4, 2004 Miyazaki, Japan Visualization of Xe and Sn Atoms Generated from Laser-Produced Plasma for EUV Light Source H. Tanaka, A. Matsumoto, K. Akinaga, A. Takahashi
More informationThe near-infrared spectra and distribution of excited states of electrodeless discharge rubidium vapour lamps
The near-infrared spectra and distribution of excited states of electrodeless discharge rubidium vapour lamps Sun Qin-Qing( ) a)b), Miao Xin-Yu( ) a), Sheng Rong-Wu( ) c), and Chen Jing-Biao( ) a)b) a)
More informationWavelength 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 informationA tunable corner-pumped Nd:YAG/YAG composite slab CW laser
Chin. Phys. B Vol. 21, No. 1 (212) 1428 A tunable corner-pumped Nd:YAG/YAG composite slab CW laser Liu Huan( 刘欢 ) and Gong Ma-Li( 巩马理 ) State Key Laboratory of Tribology, Center for Photonics and Electronics,
More informationγ irradiation induced effects on bismuth active centres and related photoluminescence properties of Bi/Er co-doped optical fibers
γ induced effects on bismuth active centres and related photoluminescence properties of Bi/Er co-doped optical fibers D. Sporea 1*, L. Mihai 1, D. Neguţ 2, Yanhua Luo 3, Binbin Yan 3,4, Mingjie Ding 3,
More informationHighly Birefringent Elliptical-Hole Microstructure Fibers With Low Confinement Loss
JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 30, NO. 21, NOVEMBER 1, 2012 3381 Highly Birefringent Elliptical-Hole Microstructure Fibers With Low Confinement Loss Wenbin Liang, Ningliang Liu, Zhihua Li, and Peixiang
More information16. More About Polarization
16. More About Polarization Polarization control Wave plates Circular polarizers Reflection & polarization Scattering & polarization Birefringent materials have more than one refractive index A special
More informationFrom optical graphene to topological insulator
From optical graphene to topological insulator Xiangdong Zhang Beijing Institute of Technology (BIT), China zhangxd@bit.edu.cn Collaborator: Wei Zhong (PhD student, BNU) Outline Background: From solid
More informationMICRODISK lasers supported by a pedestal to form strong
JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 26, NO. 11, JUNE 1, 2008 1411 Mode Coupling and Vertical Radiation Loss for Whispering-Gallery Modes in 3-D Microcavities Yong-Zhen Huang, Senior Member, IEEE, and
More informationTHE SCATTERING FROM AN ELLIPTIC CYLINDER IRRADIATED BY AN ELECTROMAGNETIC WAVE WITH ARBITRARY DIRECTION AND POLARIZATION
Progress In Electromagnetics Research Letters, Vol. 5, 137 149, 2008 THE SCATTERING FROM AN ELLIPTIC CYLINDER IRRADIATED BY AN ELECTROMAGNETIC WAVE WITH ARBITRARY DIRECTION AND POLARIZATION Y.-L. Li, M.-J.
More informationPolarization properties of corner-cube retroreflectors: Theory and experiment
University of New Orleans ScholarWorks@UNO Electrical Engineering Faculty Publications Department of Electrical Engineering 3--997 Polarization properties of corner-cube retroreflectors: Theory and experiment
More informationArbitrary and reconfigurable optics - new opportunities for integrated photonics
Arbitrary and reconfigurable optics - new opportunities for integrated photonics David Miller, Stanford University For a copy of these slides, please e-mail dabm@ee.stanford.edu How to design any linear
More informationElectro-Optical System. Analysis and Design. A Radiometry Perspective. Cornelius J. Willers SPIE PRESS. Bellingham, Washington USA
Electro-Optical System Analysis and Design A Radiometry Perspective Cornelius J Willers SPIE PRESS Bellingham, Washington USA Nomenclature xvii Preface xxiii 1 Electro-Optical System Design 1 11 Introduction
More informationHigher -o-o-o- Past Paper questions o-o-o- 3.3 Photoelectric
Higher -o-o-o- Past Paper questions 1991-2010 -o-o-o- 3.3 Photoelectric 1996 Q36 The work function for sodium metal is 2.9x10-19 J. Light of wavelength 5.4x10-7 m strikes the surface of this metal. What
More informationUltrafast All-optical Switches Based on Intersubband Transitions in GaN/AlN Multiple Quantum Wells for Tb/s Operation
Ultrafast All-optical Switches Based on Intersubband Transitions in GaN/AlN Multiple Quantum Wells for Tb/s Operation Jahan M. Dawlaty, Farhan Rana and William J. Schaff Department of Electrical and Computer
More informationHigh-power terahertz radiation from surface-emitted THz-wave parametric oscillator
High-power terahertz radiation from surface-emitted THz-wave parametric oscillator Li Zhong-Yang( ) a)b), Yao Jian-Quan( ) a)b), Xu De-Gang( ) a)b), Zhong Kai( ) a)b), Wang Jing-Li( ) a)b), and Bing Pi-Bin(
More informationSpatial Intensity Nonuniformities of an OMEGA Beam due to Nonlinear Beam Propagation
Spatial Intensity Nonuniformities of an OMEGA Beam due to Nonlinear Beam Propagation Several applications require that a laser beam maintain a high degree of wavefront quality after propagating a long
More informationSystem design of 60K Stirling-type co-axial pulse tube coolers for HTS RF filters
System design of 60K Stirling-type co-axial pulse tube coolers for HTS RF filters Y. L. Ju, K. Yuan, Y. K. Hou, W. Jing, J. T. Liang and Y. Zhou Cryogenic Laboratory, Technical Institute of Physics and
More informationIN a long-haul soliton communication system, lumped amplifiers
JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 16, NO. 4, APRIL 1998 515 Effect of Soliton Interaction on Timing Jitter in Communication Systems Armando Nolasco Pinto, Student Member, OSA, Govind P. Agrawal, Fellow,
More informationPreview from Notesale.co.uk Page 1 of 38
F UNDAMENTALS OF PHOTONICS Module 1.1 Nature and Properties of Light Linda J. Vandergriff Director of Photonics System Engineering Science Applications International Corporation McLean, Virginia Light
More informationA new lidar for water vapor and temperature measurements in the Atmospheric Boundary Layer
A new lidar for water vapor and temperature measurements in the Atmospheric Boundary Layer M. Froidevaux 1, I. Serikov 2, S. Burgos 3, P. Ristori 1, V. Simeonov 1, H. Van den Bergh 1, and M.B. Parlange
More informationSingle Emitter Detection with Fluorescence and Extinction Spectroscopy
Single Emitter Detection with Fluorescence and Extinction Spectroscopy Michael Krall Elements of Nanophotonics Associated Seminar Recent Progress in Nanooptics & Photonics May 07, 2009 Outline Single molecule
More informationLecture 6 - spectroscopy
Lecture 6 - spectroscopy 1 Light Electromagnetic radiation can be thought of as either a wave or as a particle (particle/wave duality). For scattering of light by particles, air, and surfaces, wave theory
More information2013 CAP Prize Examination
Canadian Association of Physicists SUPPORTING PHYSICS RESEARCH AND EDUCATION IN CANADA 2013 CAP Prize Examination Compiled by the Department of Physics & Engineering Physics, University of Saskatchewan
More informationDetection probability evaluation method for infrared point target under complicated backgrounds
th International Conference on Quantitative InfraRed Thermography Detection probability evaluation method for infrared point target under complicated backgrounds by Haichao Zheng, Xia Mao, Lin Jiang and
More informationWaveplate analyzer using binary magneto-optic rotators
Waveplate analyzer using binary magneto-optic rotators Xiaojun Chen 1, Lianshan Yan 1, and X. Steve Yao 1, 1. General Photonics Corp. Chino, CA, 91710, USA Tel: 909-590-5473 Fax: 909-90-5535. Polarization
More informationStudy of absorption and re-emission processes in a ternary liquid scintillation system *
CPC(HEP & NP), 2010, 34(11): 1724 1728 Chinese Physics C Vol. 34, No. 11, Nov., 2010 Study of absorption and re-emission processes in a ternary liquid scintillation system * XIAO Hua-Lin( ) 1;1) LI Xiao-Bo(
More informationScheme for Asymmetric and Deterministic Controlled Bidirectional Joint Remote State Preparation
Commun. Theor. Phys. 70 (208) 55 520 Vol. 70, No. 5, November, 208 Scheme for Asymmetric and Deterministic Controlled Bidirectional Joint Remote State Preparation Jin Shi ( 施锦 ) and You-Bang Zhan ( 詹佑邦
More informationNumerical Analysis of Low-order Modes in Thermally Diffused Expanded Core (TEC) Fibers
Proceedings of the 4th WSEAS Int. Conference on Electromagnetics, Wireless and Optical Communications, Venice, Italy, November 2-22, 26 26 Numerical Analysis of Low-order Modes in Thermally Diffused Expanded
More informationLecture 15: Thu Feb 28, 2019
Lecture 15: Thu Feb 28, 2019 Announce: HW5 posted Lecture: The AWGN waveform channel Projecting temporally AWGN leads to spatially AWGN sufficiency of projection: irrelevancy theorem in waveform AWGN:
More informationPolarization division multiplexing system quality in the presence of polarization effects
Opt Quant Electron (2009) 41:997 1006 DOI 10.1007/s11082-010-9412-0 Polarization division multiplexing system quality in the presence of polarization effects Krzysztof Perlicki Received: 6 January 2010
More informationThursday, November 1st.
Thursday, November 1st. Announcements. Homework 7 - due Tuesday, Nov. 6 Homework 8 - paper 2 topics, questions and sources due Tuesday, Nov. 13 Midterm Paper 2 - due Tuesday, Nov. 20 I will hand out a
More informationFIBER OPTICS. Prof. R.K. Shevgaonkar. Department of Electrical Engineering. Indian Institute of Technology, Bombay. Lecture: 14.
FIBER OPTICS Prof. R.K. Shevgaonkar Department of Electrical Engineering Indian Institute of Technology, Bombay Lecture: 14 Optical Sources Fiber Optics, Prof. R.K. Shevgaonkar, Dept. of Electrical Engineering,
More informationUnderstanding Semiconductor Lasers
27 April 2010 age 1 of 8 Experiment II Understanding Semiconductor Lasers The purpose of this experiment is to explore the basic characteristics of semiconductor lasers. We will measure and calculate the
More informationCS6956: Wireless and Mobile Networks Lecture Notes: 2/4/2015
CS6956: Wireless and Mobile Networks Lecture Notes: 2/4/2015 [Most of the material for this lecture has been taken from the Wireless Communications & Networks book by Stallings (2 nd edition).] Effective
More informationOptical Fiber Signal Degradation
Optical Fiber Signal Degradation Effects Pulse Spreading Dispersion (Distortion) Causes the optical pulses to broaden as they travel along a fiber Overlap between neighboring pulses creates errors Resulting
More informationExperiment objectives: measure the ratio of Planck s constant to the electron charge h/e using the photoelectric effect.
Chapter 1 Photoelectric Effect Experiment objectives: measure the ratio of Planck s constant to the electron charge h/e using the photoelectric effect. History The photoelectric effect and its understanding
More informationLaserphysik. Prof. Yong Lei & Dr. Yang Xu. Fachgebiet Angewandte Nanophysik, Institut für Physik
Laserphysik Prof. Yong Lei & Dr. Yang Xu Fachgebiet Angewandte Nanophysik, Institut für Physik Contact: yong.lei@tu-ilmenau.de; yang.xu@tu-ilmenau.de Office: Heisenbergbau V 202, Unterpörlitzer Straße
More informationDescription of radiation field
Description of radiation field Qualitatively, we know that characterization should involve energy/time frequency all functions of x,t. direction We also now that radiation is not altered by passing through
More informationCalculating standard captured spectra of formation elements
1007/s12182-012-0231-8 463 Calculating standard captured spectra of formation elements Wu Wensheng, Xiao Lizhi, Zhang Lijuan and Niu Wei State Key Laboratory of Petroleum Resource and Prospecting, China
More informationMeasurement of Electrostatic Charge and Aerodynamic Diameter of Sub-Micron Particles by the ESPART Analyzer
Proc. ESA Annual Meeting on Electrostatics 2008, Paper G3 1 Measurement of Electrostatic Charge and Aerodynamic Diameter of Sub-Micron Particles by the ESPART Analyzer J.W. Stark, J. Zhang, R. Sharma,
More informationOptical solitons and its applications
Physics 568 (Nonlinear optics) 04/30/007 Final report Optical solitons and its applications 04/30/007 1 1 Introduction to optical soliton. (temporal soliton) The optical pulses which propagate in the lossless
More informationExplain how Planck resolved the ultraviolet catastrophe in blackbody radiation. Calculate energy of quanta using Planck s equation.
Objectives Explain how Planck resolved the ultraviolet catastrophe in blackbody radiation. Calculate energy of quanta using Planck s equation. Solve problems involving maximum kinetic energy, work function,
More informationNear-field diffraction of irregular phase gratings with multiple phase-shifts
References Near-field diffraction of irregular phase gratings with multiple phase-shifts Yunlong Sheng and Li Sun Center for optics, photonics and laser (COPL), University Laval, Quebec City, Canada, G1K
More informationPrinciples of Radiative Transfer Principles of Remote Sensing. Marianne König EUMETSAT
- Principles of Radiative Transfer Principles of Remote Sensing Marianne König EUMETSAT marianne.koenig@eumetsat.int Remote Sensing All measurement processes which perform observations/measurements of
More informationSupporting Information
Supporting Information Light emission near a gradient metasurface Leonard C. Kogos and Roberto Paiella Department of Electrical and Computer Engineering and Photonics Center, Boston University, Boston,
More informationTHE MEASUREMENT OF SOLAR ULTRAVIOLET SPECTRAL IRRADIANCE PROBLEMS & SOLUTIONS
THE MEASUREMENT OF SOLAR ULTRAVIOLET SPECTRAL IRRADIANCE PROBLEMS & SOLUTIONS INTRODUCTION In recent years, researchers involved in many unrelated scientific disciplines have acquired an interest in accurately
More informationCOMMUNICATION SCIENCES AND ENGINEERING
COMMUNICATION SCIENCES AND ENGINEERING XVII. OPTICAL PROPAGATION AND COMMUNICATION Academic and Research Staff Prof. Robert S. Kennedy Prof. Cardinal Warde Prof. Jeffrey H. Shapiro Dr. Horace P. H. Yuen
More informationby 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 informationRadiative transfer theory (Pure gas atmosphere)
Radiative transfer theory (Pure gas atmosphere Bruno Carli Radiative transfer equation The radiative transfer equation states that the specific intensity of radiation I( (defined as the energy flux per
More informationAtomic filter based on stimulated Raman transition at the rubidium D1 line
Atomic filter based on stimulated Raman transition at the rubidium D1 line Xiuchao Zhao, 1, Xianping Sun, 1,3 Maohua Zhu, 1 Xiaofei Wang, 1, Chaohui Ye, 1 and Xin Zhou 1,* 1 State Key Laboratory of Magnetic
More informationSEAFLOOR MAPPING MODELLING UNDERWATER PROPAGATION RAY ACOUSTICS
3 Underwater propagation 3. Ray acoustics 3.. Relevant mathematics We first consider a plane wave as depicted in figure. As shown in the figure wave fronts are planes. The arrow perpendicular to the wave
More informationNotes on the point spread function and resolution for projection lens/corf. 22 April 2009 Dr. Raymond Browning
Notes on the point spread function and resolution for projection lens/corf Abstract April 009 Dr. Raymond Browning R. Browning Consultants, 4 John Street, Shoreham, NY 786 Tel: (63) 8 348 This is a calculation
More information1 ESO's Compact Laser Guide Star Unit Ottobeuren, Germany Beam optics!
1 ESO's Compact Laser Guide Star Unit Ottobeuren, Germany www.eso.org Introduction Characteristics Beam optics! ABCD matrices 2 Background! A paraxial wave has wavefronts whose normals are paraxial rays.!!
More informationStimulated Emission. Electrons can absorb photons from medium. Accelerated electrons emit light to return their ground state
Lecture 15 Stimulated Emission Devices- Lasers Stimulated emission and light amplification Einstein coefficients Optical fiber amplifiers Gas laser and He-Ne Laser The output spectrum of a gas laser Laser
More information2001 Spectrometers. Instrument Machinery. Movies from this presentation can be access at
2001 Spectrometers Instrument Machinery Movies from this presentation can be access at http://www.shsu.edu/~chm_tgc/sounds/sound.html Chp20: 1 Optical Instruments Instrument Components Components of various
More informationLight Emission. Today s Topics. Excitation/De-Excitation 10/26/2008. Excitation Emission Spectra Incandescence
Light Emission Excitation Emission Spectra Incandescence Absorption Spectra Today s Topics Excitation/De-Excitation Electron raised to higher energy level Electron emits photon when it drops back down
More informationChapter 24 Photonics Question 1 Question 2 Question 3 Question 4 Question 5
Chapter 24 Photonics Data throughout this chapter: e = 1.6 10 19 C; h = 6.63 10 34 Js (or 4.14 10 15 ev s); m e = 9.1 10 31 kg; c = 3.0 10 8 m s 1 Question 1 Visible light has a range of photons with wavelengths
More informationSupplementary Information
Electronic Supplementary Material (ESI) for RSC Advances. This journal is The Royal Society of Chemistry 2017 Supplementary Information Supramolecular interactions via hydrogen bonding contributing to
More informationSimplified Collector Performance Model
Simplified Collector Performance Model Prediction of the thermal output of various solar collectors: The quantity of thermal energy produced by any solar collector can be described by the energy balance
More informationFull polarization control for fiber optical quantum communication systems using polarization encoding
Full polarization control for fiber optical quantum communication systems using polarization encoding G. B. Xavier, G. Vilela de Faria, G. P. Temporão and J. P. von der Weid* Pontifical Catholic University
More informationReference literature. (See: CHEM 2470 notes, Module 8 Textbook 6th ed., Chapters )
September 17, 2018 Reference literature (See: CHEM 2470 notes, Module 8 Textbook 6th ed., Chapters 13-14 ) Reference.: https://slideplayer.com/slide/8354408/ Spectroscopy Usual Wavelength Type of Quantum
More informationThe Nature of Light. We have a dual model
Light and Atoms Properties of Light We can come to understand the composition of distant bodies by analyzing the light they emit This analysis can tell us about the composition as well as the temperature
More informationarxiv: v1 [physics.optics] 30 Mar 2010
Analytical vectorial structure of non-paraxial four-petal Gaussian beams in the far field Xuewen Long a,b, Keqing Lu a, Yuhong Zhang a,b, Jianbang Guo a,b, and Kehao Li a,b a State Key Laboratory of Transient
More informationComplex refractive-index measurement based on Fresnel s equations and the uses of heterodyne interferometry
Complex refractive-index measurement based on Fresnel s equations and the uses of heterodyne interferometry Ming-Horng Chiu, Ju-Yi Lee, and Der-Chin Su The phase difference between s and p polarization
More informationDesign of a Multi-Mode Interference Crossing Structure for Three Periodic Dielectric Waveguides
Progress In Electromagnetics Research Letters, Vol. 75, 47 52, 2018 Design of a Multi-Mode Interference Crossing Structure for Three Periodic Dielectric Waveguides Haibin Chen 1, Zhongjiao He 2,andWeiWang
More informationComparisons of Performance of Various Transmission Schemes of MIMO System Operating under Rician Channel Conditions
Comparisons of Performance of Various ransmission Schemes of MIMO System Operating under ician Channel Conditions Peerapong Uthansakul and Marek E. Bialkowski School of Information echnology and Electrical
More informationSpectra Power and Bandwidth of Fiber Bragg Grating Under Influence of Gradient Strain
PHOTONIC SENSORS / Vol. 6, No. 4, 216: 333 338 Spectra Power and Bandwidth of Fiber Bragg Grating Under Influence of Gradient Strain Qinpeng LIU *, Xueguang QIAO, Zhen an JIA, and Haiwei FU Key Laboratory
More informationNaser M. Ahmed *, Zaliman Sauli, Uda Hashim, Yarub Al-Douri. Abstract
Int. J. Nanoelectronics and Materials (009) 89-95 Investigation of the absorption coefficient, refractive index, energy band gap, and film thickness for Al 0. Ga 0.89 N, Al 0.03 Ga 0.97 N, and GaN by optical
More informationRadiometry TD. Cursus/option : 2A Date de mise à jour : 5 sept 2018 Année scolaire : Intervenants : Antoine Glicenstein
Radiometry TD Cursus/option : 2A Date de mise à jour : 5 sept 2018 Année scolaire : 2018-2019 Intervenants : Antoine Glicenstein 1 2 Institut d Optique Graduate School Radiometry TD 1 Learning objectives:
More informationAn analytical model for the illuminance distribution of a power LED
An analytical model for the illuminance distribution of a power LED Hongming Yang, 1,, Jan W. M. Bergmans, 1, Tim C. W. Schenk, Jean-Paul M. G. Linnartz 1, and Ronald Rietman 1 Department of Electrical
More information