发布求助
文献互助 智能选刊 最新文献

Pure and Applied Optics: Journal of The European Optical Society Part A最新文献

筛选
英文 中文
Reconstruction algorithm for diffraction tomography of diffuse photon density waves in a random medium 随机介质中漫射光子密度波的衍射层析成像重建算法
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-09-01 DOI: 10.1088/0963-9659/7/5/023
Bingquan Chen, J. Stamnes, K. Stamnes
{"title":"Reconstruction algorithm for diffraction tomography of diffuse photon density waves in a random medium","authors":"Bingquan Chen, J. Stamnes, K. Stamnes","doi":"10.1088/0963-9659/7/5/023","DOIUrl":"https://doi.org/10.1088/0963-9659/7/5/023","url":null,"abstract":"With applications in medical diagnosis in mind we apply the theory of diffraction tomography to diffuse photon density waves in a random medium. We consider the two-and-a-half-dimensional (2.5D) problem in which a two-dimensional (2D) object is illuminated by diffuse photon density waves from a point source. Both the forward problem and the inverse problem are discussed, and a reconstruction algorithm based on the weak-scattering approximation is presented together with computer simulations.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"45 1","pages":"1161-1180"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83326146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Dynamics and dynamic light-scattering properties of Brownian particles under laser radiation pressure 激光辐射压力下布朗粒子的动力学和动态光散射特性
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-09-01 DOI: 10.1088/0963-9659/7/5/010
Y. Harada, T. Asakura
{"title":"Dynamics and dynamic light-scattering properties of Brownian particles under laser radiation pressure","authors":"Y. Harada, T. Asakura","doi":"10.1088/0963-9659/7/5/010","DOIUrl":"https://doi.org/10.1088/0963-9659/7/5/010","url":null,"abstract":"Dynamics and light-scattering properties of Brownian particles in colloidal suspensions under the influence of the radiation pressure force of an illuminating laser beam are investigated by means of computer simulations using the Fokker-Planck equation and generalized Lorenz-Mie theory. Dynamic behaviour of the particles and a temporal correlation function of intensity fluctuations of the light scattered by these particles are calculated for various factors of particle size and power of the illuminating laser beam. Results of the simulations support the experimental observations of deformation in the temporal correlation functions of the scattered light and their dependences on the size of the particles and the power of the laser. From simulation results for the dynamics of particles, it is found that these changes in the correlation function arise from suppression of the random motion of the particles in the radial direction of the laser beam and induction of an average uniform motion in the beam propagation direction.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"18 1","pages":"1001-1012"},"PeriodicalIF":0.0,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88701841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Collinear diffraction of Gaussian optical beams by an acoustic pulse 声波脉冲对高斯光束的共线衍射
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/010
V. N. Parygin, A. V. Vershoubskiy
{"title":"Collinear diffraction of Gaussian optical beams by an acoustic pulse","authors":"V. N. Parygin, A. V. Vershoubskiy","doi":"10.1088/0963-9659/7/4/010","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/010","url":null,"abstract":"The peculiarities of collinear acousto-optical diffraction of Gaussian optical beams by an acoustic pulse of finite dimensions with an arbitrary temporal envelope is investigated theoretically. The system of two first-order equations that describe the Fourier spectra of transmitted and diffracted light beams and of an acoustic pulse which are propagating in the same direction is deduced. Linear frequency modulation of an acoustic pulse is considered. The filter transmission curves during the collinear diffraction by acoustic pulses with temporal envelopes described by Gaussian and sinc(x) functions is calculated. The dependence of the acousto-optical cell transmission bandwidth on both pulse and crystal length variation is studied.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"40 1","pages":"733-746"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81376427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Injection-seeded optical parametric oscillator for airborne water vapour DIAL 用于机载水蒸汽DIAL的注入种子光学参量振荡器
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/019
A. Fix, V. Weiss, G. Ehret
{"title":"Injection-seeded optical parametric oscillator for airborne water vapour DIAL","authors":"A. Fix, V. Weiss, G. Ehret","doi":"10.1088/0963-9659/7/4/019","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/019","url":null,"abstract":"Any detailed understanding of the role of water vapour in the global climate system requires precise measurements in the atmosphere with high temporal and spatial resolution. A technique that is appropriate to deliver these data is airborne differential absorption lidar (DIAL) applied in the near-infrared spectral range. In order to accurately determine atmospheric water vapour concentrations by means of the DIAL technique tunability and spectral properties of the lidar transmitter are very important. It is demonstrated that the spectral and energy requirements are achieved using optical parametric oscillators (OPOs) that are line-narrowed by the technique of injection seeding with radiation from dye lasers or from laser diodes. When the OPO is unseeded its spectral width is broad enough to suffer only negligible absorption from the absorption lines. Therefore, the unseeded OPO radiation can be used for off-line measurement, which simplifies the DIAL set-up significantly. In addition, the laser diodes were employed to measure line parameters of a selected absorption line in the near-IR. Their precise determination is important in order to make accurate DIAL measurements.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"1 1","pages":"837-852"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89611217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Solid-state coherent laser radar wind field measurement systems 固体相干激光雷达风场测量系统
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/021
R. Huffaker, Paul A. Reveley
{"title":"Solid-state coherent laser radar wind field measurement systems","authors":"R. Huffaker, Paul A. Reveley","doi":"10.1088/0963-9659/7/4/021","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/021","url":null,"abstract":"Diode-pumped solid-state pulsed coherent laser radar systems have recently been developed at Coherent Technologies, Inc., for the remote measurement of atmospheric wind fields. Flashlamp-pumped systems have been utilized since 1990 for obtaining wind field measurements. These flashlamp-pumped lidar systems have been applied to wind profiling, aircraft-wake vortex measurements, airport wind shear and gust front monitoring, military cargo air drops and many other applications. The diode-pumped coherent lidar systems currently available are capable of near turnkey operation. The Tm:YAG laser transceivers operate at with output pulse energies of 1-10 mJ with PRFs of 1000 to 100 Hz, respectively. Range resolutions of 30-75 m are typical. A real-time lidar signal processor has also been developed for collecting and analysing laser radar (lidar) data. The signal processor is based on a commercial PC architecture and offers a real-time data acquisition, analysis, display, recording and playback environment. Wind measurements and overall system performance results will be presented. Wind measurement performance, for a variety of applications, is presented using the flashlamp- and diode-pumped coherent lidars including measured wind profiles from ground and on aircraft, wake vortex tracking results, and example flows over mountain terrain.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"2 1","pages":"863-873"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91425813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
CERENKOV SECOND HARMONIC GENERATION REVISITED : EXISTENCE OF PHASE MATCHING 再论切伦科夫二次谐波产生:相位匹配的存在性
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/011
R. Reinisch, G. Vitrant
{"title":"CERENKOV SECOND HARMONIC GENERATION REVISITED : EXISTENCE OF PHASE MATCHING","authors":"R. Reinisch, G. Vitrant","doi":"10.1088/0963-9659/7/4/011","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/011","url":null,"abstract":"We show that in Cerenkov second harmonic generation the phase-matching condition is not automatically satisfied. The new concept of a Cerenkov phase-matching surface is introduced and the expression of the Cerenkov phase-matching condition is derived. We also show that the Cerenkov scheme includes second harmonic generation at distributed couplers. For example, use of grating couplers leads to grating-assisted Cerenkov second harmonic generation. These are important results which modify the understanding of the physics underlying Cerenkov frequency doubling.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"59 1","pages":"747-756"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80258875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Remote monitoring of cloud parameters from ground-based FTIR measurements 从地面FTIR测量中远程监测云参数
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/023
J. Thériault, L. Bissonnette, G. Roy
{"title":"Remote monitoring of cloud parameters from ground-based FTIR measurements","authors":"J. Thériault, L. Bissonnette, G. Roy","doi":"10.1088/0963-9659/7/4/023","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/023","url":null,"abstract":"In this paper a method for the evaluation of cloud temperature and transmittance from ground-based measurements of the downwelling spectral radiance is proposed. The method uses the strong emission band of ozone at , which constitutes a natural source of IR radiation for probing clouds. Temperature and transmittance are derived from the cloudy-sky radiance measured in two narrow spectral channels: the first one is approximately at the centre of the ozone band at and the second one is off the band at . The cloud parameters are found by solving a system of equations requiring, as input, an estimate of the cloud height and thickness obtained from lidar returns, and of atmospheric temperature and humidity profiles. The validation tests performed on experimental spectra demonstrate the accuracy of the method with typical temperature errors smaller than 2 K for the spectral measurements coincident in time with the lidar measurements. Finally, the main sources of limitations to the method are identified and analysed.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"50 1","pages":"889-905"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77446616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Polarization holographic gratings with surface relief in amorphous azobenzene containing methacrylic copolymers 非晶态偶氮苯含甲基丙烯酸共聚物中具有表面起伏的偏振全息光栅
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/009
I. Naydenova, T. Petrova, N. Tomova, V. Dragostinova, L. Nikolova, T. Todorov
{"title":"Polarization holographic gratings with surface relief in amorphous azobenzene containing methacrylic copolymers","authors":"I. Naydenova, T. Petrova, N. Tomova, V. Dragostinova, L. Nikolova, T. Todorov","doi":"10.1088/0963-9659/7/4/009","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/009","url":null,"abstract":"Two types of high-efficiency amorphous methacrylic azobenzene polymer for reversible holographic storage are synthesized. It is shown that their efficiency is due to both photoinduced linear birefringence and surface relief. The contributions of these two effects on the diffraction efficiency of the holographic gratings are separated using the methods of polarization holography and it is found that they are strongly influenced by the differences in the chemical structure of the polymers. It is shown that higher relief corresponds to stronger coupling between the azobenzene side chains and the main chains of the polymer molecules.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"15 1","pages":"723-731"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75204561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Enlarged shift of light frequency in a modified Bragg cell 在改进的布拉格电池中，光频率的放大位移
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/013
V. Torchigin, A. Torchigin
{"title":"Enlarged shift of light frequency in a modified Bragg cell","authors":"V. Torchigin, A. Torchigin","doi":"10.1088/0963-9659/7/4/013","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/013","url":null,"abstract":"Ultrasonic light interaction in a slightly modified Bragg cell in the form of a truncated pyramid is considered theoretically. It is shown that the duration of the interaction can be increased by a factor of . The ultrasonic wave not only modulates the light wave in space but can also significantly increase its frequency and energy. Properties of moving optical resonators formed by the ultrasonic wave in the cell in relation to its taper and the intensity of the ultrasonic wave, optimal regimes of the interaction, maximally possible frequency shift, physical mechanisms responsible for the frequency shift, and possible generalization of the cell are considered.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"78 1","pages":"763-782"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85527639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Theoretical model for the temporal dynamics in photorefractive two-wave mixing 光折变双波混频时域动力学的理论模型
Pure and Applied Optics: Journal of The European Optical Society Part A Pub Date : 1998-07-01 DOI: 10.1088/0963-9659/7/4/014
Q. Zou
{"title":"Theoretical model for the temporal dynamics in photorefractive two-wave mixing","authors":"Q. Zou","doi":"10.1088/0963-9659/7/4/014","DOIUrl":"https://doi.org/10.1088/0963-9659/7/4/014","url":null,"abstract":"We present our theoretical investigations into the formalism of the transient effects during photorefractive two-wave mixing. An analytical model has been developed based on Kukhtarev's band-transport equations and on the linearization approximation. The physical phenomena involved during transients have been predicted for both drift and diffusion mechanisms. Good agreement is found when our model is compared with previous works, especially with the experimental measurements performed with BSO crystals by Heaton and Solymar.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":"84 1","pages":"783-794"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73238742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信