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Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society最新文献

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Mid-IR interband cascade light emitting diodes based on type-II quantum wells 基于ii型量子阱的中红外带间级联发光二极管
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571621
R.Q. Yang, Chih-hsiang Lin, P. Chang, S. Murry, D. Zhang, S. Pei, S. Kurtz, S. Chu, F. Ren
{"title":"Mid-IR interband cascade light emitting diodes based on type-II quantum wells","authors":"R.Q. Yang, Chih-hsiang Lin, P. Chang, S. Murry, D. Zhang, S. Pei, S. Kurtz, S. Chu, F. Ren","doi":"10.1109/LEOS.1996.571621","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571621","url":null,"abstract":"We can circumvent the fast phonon scattering loss in type-I QC lasers, while retaining the cascaded tunneling injection advantage, by utilizing photon emission between an electron state and a hole state in a new class of QC lasers based on type-II QWs, which was first proposed by Yang and is referred to as type-II QC lasers. The type-II QC lasers can have a higher radiative efficiency because the phonon relaxation process is greatly suppressed in an interband transition. Here, we report the first observation of mid-IR electroluminescence in such a type-II QC laser structure. We illustrates the band diagram of two periods of an InAs-AlSb-GaSb type-II QC laser diode under a forward bias.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124288044","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
Evaluation of gain saturation behaviour in travelling wave semiconductor amplifiers 行波半导体放大器增益饱和特性的评估
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571523
In Kim, K. Uppal, P. Dapkus
{"title":"Evaluation of gain saturation behaviour in travelling wave semiconductor amplifiers","authors":"In Kim, K. Uppal, P. Dapkus","doi":"10.1109/LEOS.1996.571523","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571523","url":null,"abstract":"In this paper, we describe a more accurate method to calculate the gain saturation behavior in a QW semiconductor laser traveling wave amplifier. Solving the rate equation for the carrier density in its steady state condition in conjunction with the gain and recombination rate calculated using Kane-type Hamiltonian, a rigorous relation is derived for the gain saturation behavior with increasing photon density.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116886410","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
Progress in all-solid-state deep-ultraviolet lasers 全固态深紫外激光器的研究进展
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571923
M. Oka, H. Masuda, H. Kikuchi, S. Kubota
{"title":"Progress in all-solid-state deep-ultraviolet lasers","authors":"M. Oka, H. Masuda, H. Kikuchi, S. Kubota","doi":"10.1109/LEOS.1996.571923","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571923","url":null,"abstract":"High power deep ultraviolet (UV) radiation has attracted much attention in areas such as photo-lithography. We report progress in improving the quality of Czochralski-grown /spl beta/-BaB/sub 2/O/sub 4/ (BBO) which is essential for generating high average output power in the deep ultraviolet regime. In order to evaluate our CZ grown BBO, a flash-lamp pumped Q-switched Nd:YAG laser (Quantel YG-682S) was employed.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116959030","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
Dispersion limited fiber-optic CDMA systems with overlapped signature sequences 具有重叠特征序列的色散受限光纤CDMA系统
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571962
F.B. Mezger, M. Brandt-Pearce
{"title":"Dispersion limited fiber-optic CDMA systems with overlapped signature sequences","authors":"F.B. Mezger, M. Brandt-Pearce","doi":"10.1109/LEOS.1996.571962","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571962","url":null,"abstract":"A simple and flexible method is presented and analyzed for counteracting pulse dispersion in a fiber-optic code division multiple access system by allowing the pulses transmitted in each user's code to overlap into neighboring pulse slots. The simultaneous use of the entire channel by users in an optical CDMA system using ultrashort pulses requires minimization of dispersive effects. After establishing a dispersion model, a method of intentionally widening the transmitted pulses to counteract pulse dispersion in an optical CDMA system while maintaining the same high data rate and the same number of users is suggested. It is demonstrated that these widened pulses are much less susceptible to dispersion.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117227598","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: 4
High performance polarization-independent WDM filtering using an InP reflective arrayed waveguide grating 使用InP反射阵列波导光栅的高性能偏振无关波分滤波
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571636
J. Soole, M. Amersfoort, H. Leblanc, A. Rajhel, C. Caneau, C. Youtsey, I. Adesida
{"title":"High performance polarization-independent WDM filtering using an InP reflective arrayed waveguide grating","authors":"J. Soole, M. Amersfoort, H. Leblanc, A. Rajhel, C. Caneau, C. Youtsey, I. Adesida","doi":"10.1109/LEOS.1996.571636","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571636","url":null,"abstract":"Summary form only given. We report a high-performance polarization-independent InP arrayed waveguide grating (AWG) filter employing a compact reflective geometry. Here, we show that square-core AWGs may be realized in a reflection geometry, and still provide high quality filtering. Successful use of a reflective AWG geometry will permit advanced AWG-based components to be made with smaller die-sizes.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124879277","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
High side mode suppression in gain-coupled DFB lasers 增益耦合DFB激光器的高侧模抑制
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571678
Jianyao Chen, R. Maciejko, T. Makino
{"title":"High side mode suppression in gain-coupled DFB lasers","authors":"Jianyao Chen, R. Maciejko, T. Makino","doi":"10.1109/LEOS.1996.571678","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571678","url":null,"abstract":"Using the spatially-dependent multimode rate equations, this paper presents a detailed study of both the complex coupling effect and the spatial hole burning effect on side mode suppression in DFB lasers.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115253779","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
Dynamic channel equalization in reconfigurable WDM networks using acousto-optic tunable filters 利用声光可调滤波器实现可重构WDM网络中的动态信道均衡
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571611
A. Willner, S.H. Huang, X. Y. Zou, S. Hwang, D.A. Smith, Z. Bao
{"title":"Dynamic channel equalization in reconfigurable WDM networks using acousto-optic tunable filters","authors":"A. Willner, S.H. Huang, X. Y. Zou, S. Hwang, D.A. Smith, Z. Bao","doi":"10.1109/LEOS.1996.571611","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571611","url":null,"abstract":"One of the most promising technologies in optical networks is the use of wavelength-division multiplexing (WDM), in which many different-wavelength channels are simultaneously transmitted along the optical fiber. One key underlying technology which has enabled these systems is the introduction of the erbium-doped fiber amplifier EDFA. A glaring disadvantage of the EDFA is that the gain is not uniform with wavelength, causing a significant power and signal-to-noise ratio (SNR) differential among many channels. We will discuss our demonstrations of dynamically equalizing three 2.5 Gbit/s WDM channels in which the channel power differential is reduced from 20 dB to only 1 dB over a distance of 2,500 km by placing an acousto optical filter in an EDFA.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"250 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116146944","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: 1
Scale ranging with subpsec pulses of THz radiation 太赫兹辐射的亚秒脉冲刻度测距
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565185
D. Grischkowsky, R. Cheville
{"title":"Scale ranging with subpsec pulses of THz radiation","authors":"D. Grischkowsky, R. Cheville","doi":"10.1109/LEOS.1996.565185","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565185","url":null,"abstract":"Here we describe the use of optoelectronic techniques to generate single cycle pulses of freely propagating THz radiation, and thereby demonstrate ultrawide bandwidth scattering from simple geometrical objects. These pulses are the best approximation to impulse excitation ever used in ranging studies. The absolute bandwith is also larger than any other previously reported. The relatively short wavelengths of the THz pulse permit target features of less than 1 mm to be observed, making this technique ideal for scale ranging measurements since realistic target to wavelength ratios can be maintained. Furthermore, the measurement window achieved by the optolectronic gating technique enables only the scattered signal from the target to be detected, providing background free measurements.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121967016","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
High power diffusing tip fibers for photocoagulation 用于光凝的高功率扩散尖端光纤
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565230
E. Sinofsky
{"title":"High power diffusing tip fibers for photocoagulation","authors":"E. Sinofsky","doi":"10.1109/LEOS.1996.565230","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565230","url":null,"abstract":"Laser photocoagulation has long been used to produce localized heating and subsequent destruction of tissue in an attempt to treat tumors and other diseases. A heat resistant, polymer diffusing fiber tip has been developed that produces an homogenous light emission over its light diffusing length. The light emitted from the diffuser is equally distributed into the tissue with no hot spots that would cause carbonization to occur. With this approach we have demonstrated large lesions, with no carbonization produced in reasonably short (about 5 min.) laser exposures.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"17 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116859659","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
Scanning near-field observation of magnetic domains in Pt/Co thin films and their development as a function of applied field Pt/Co薄膜磁畴的扫描近场观测及其随场函数的发展
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565224
Y. Chen, V. Kottler, N. Essaidi, C. Chappert
{"title":"Scanning near-field observation of magnetic domains in Pt/Co thin films and their development as a function of applied field","authors":"Y. Chen, V. Kottler, N. Essaidi, C. Chappert","doi":"10.1109/LEOS.1996.565224","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565224","url":null,"abstract":"We propose a scanning near-field technique to study magneto-optical (MO) properties of magnetic multilayered thin films. The experiments are carried out using an integrated far-field and near-field microscope. Gold coated fiber tips are used as scanning probes for both STM and SNOM signal collection and the tip to sample separation is controlled within the tunneling distance. We additionally placed a magnetic field coil around the sample holder, which produces a DC field up to 1 kOe. This allows us to study MO properties of magnetic thin films as a function of applied field for both far field Kerr observation and scanning near-field imaging.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128388533","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
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