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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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Single quantum dot spectroscopy 单量子点光谱学
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565181
D. Gammon, E. Snow, B. V. Shanabrook, S. W. Brown, T. Kennedy, D. Katzer, D. Park
{"title":"Single quantum dot spectroscopy","authors":"D. Gammon, E. Snow, B. V. Shanabrook, S. W. Brown, T. Kennedy, D. Katzer, D. Park","doi":"10.1109/LEOS.1996.565181","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565181","url":null,"abstract":"Semiconductor quantum dots localize the exciton in all three spatial dimensions and completely quantize the exciton energy spectrum. In the past, experimental studies of quantum dots have been severely hampered by large fluctuations in the dot size which leads to large inhomogeneous broadening in the optical spectra. To avoid this problem, we have developed the capability to measure the photoluminescence (PL) spectra of single quantum dots which are formed naturally from the monolayer-sized interface fluctuations in a thin GaAs/AlGaAs quantum well. This is accomplished by reducing the laser spot size through the use of apertures patterned in an Al mask evaporated directly on the sample surface. By exciting and detecting through a single aperture we obtain PL spectra in which each spectrum is composed of quantum PL lines, the number of which is reduced by going to smaller apertures.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"1 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":"114374520","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
Thermal imaging by infrared near-field microscopy 红外近场显微镜热成像
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565222
C. Feng, M. Unlu, B. Goldberg, W. Herzog
{"title":"Thermal imaging by infrared near-field microscopy","authors":"C. Feng, M. Unlu, B. Goldberg, W. Herzog","doi":"10.1109/LEOS.1996.565222","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565222","url":null,"abstract":"Heat dissipation is a major concern in integrated circuit (IC) design. Mapping the temperature distribution of ICs plays a very important role in detecting fabrication and material defects and also verifying the temperature distribution predicted by thermal simulations. We describe a non-invasive, affordable and easy to maintain thermal imaging system capable of measuring devices under normal operating conditions. The operating principle of our thermal imaging system is based on the application of near-field scanning optical microscopy (NSOM) to IR thermography.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"135 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":"116899809","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
Fourier plane non-linear filtering algorithm for active sonar signal processing 主动声纳信号处理的傅里叶平面非线性滤波算法
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565212
F. Chan, B. Javidi
{"title":"Fourier plane non-linear filtering algorithm for active sonar signal processing","authors":"F. Chan, B. Javidi","doi":"10.1109/LEOS.1996.565212","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565212","url":null,"abstract":"Nonlinear filtering techniques have been shown to provide good performance for pattern recognition applications. In this paper, we apply these techniques to active sonar processing and show improved performance of target echo ranging in highly reverberant environments. We propose an algorithm that eliminates the need for range and azimuthal data normalization after the matched filter by scaling the input signal prior to matched filtering.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"86 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":"116189608","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
Parallel data transfer from 3-D memories 3-D存储器的并行数据传输
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565175
S. Esener, F. Mccormick
{"title":"Parallel data transfer from 3-D memories","authors":"S. Esener, F. Mccormick","doi":"10.1109/LEOS.1996.565175","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565175","url":null,"abstract":"In this presentation we will discuss possible optoelectronic packaging technologies that can provide the much needed compactness and light weight to future parallel readout optical heads. Based on the characteristics of these technologies we will discuss possible data rates that can be achieved over the next decade by volumetric optical disk systems and discuss their potential applications.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"45 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":"123512884","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
Global resource management: a systems approach to environmental problems 全球资源管理:解决环境问题的系统方法
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571564
D. Atwood
{"title":"Global resource management: a systems approach to environmental problems","authors":"D. Atwood","doi":"10.1109/LEOS.1996.571564","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571564","url":null,"abstract":"The end ofthe Cold War offers an unprecedented opportunity to move defense technology into the arena of the commercial information age. One example of this conversion is Raytheon's Wide Area Surveillance (WAS) initiative, designed to provide information products to the public and governmental agencies of developing nations. Specifically, the WAS system integrates sensors, storage technology, data fusion techniques, and rule-based reasoning tools into a system capable of converting raw data from disparate sources into the products needed to support: environmental monitoring and protection; national resource development; economic development; and national sovereignty. A real-world application of this process is the WAS program designed to assist the Brazilian government with the sustainable development of the Amazon rain forest. The goal of this presentation is to address the objectives and methods of Wide Area Surveillance programs. The size and complexity of Brazil's System for the Vigilance of the Amazon (SIVAM) will offer an excellent forum for discussing the challenges of data acquisition, sensor fusion, system integration, and program financing in developing nations. The SIVAM program addresses issues such as illegal mining, deforestation, air and water pollution, protection of indigenous peoples, land use, smuggling, and narcotics trafficking.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"56 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":"124014329","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
A new design for tapered-geometry high-power semiconductor optical sources 锥形高功率半导体光源的新设计
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571625
N. Brooks, J. Sarma, I. Middlemast
{"title":"A new design for tapered-geometry high-power semiconductor optical sources","authors":"N. Brooks, J. Sarma, I. Middlemast","doi":"10.1109/LEOS.1996.571625","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571625","url":null,"abstract":"A compact model for tapered-geometry optical sources has been developed using perturbation analysis to evaluate carrier-induced changes to modal propagation constants. Results for novel, parabolically-tapered devices demonstrate their merit as high-power semiconductor laser sources.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"06 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":"124624361","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: 8
The revival of Raman amplifiers 拉曼放大器的复兴
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565249
A. Stentz
{"title":"The revival of Raman amplifiers","authors":"A. Stentz","doi":"10.1109/LEOS.1996.565249","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565249","url":null,"abstract":"The extensive work on Raman amplifiers conducted in the mid 1980's abruptly ended with the advent of erbium doped fiber amplifiers. However, recent advances in high power fiber lasers have enabled the construction of the practical pump lasers needed to pump Raman amplifiers, thereby renewing interest in this versatile technology. In this paper, we describe the technologies that have made this revival possible and review recent progress in Raman fiber amplifiers, discrete and distributed, analog and digital, at both 1.3 and 1.5 /spl mu/m.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"29 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":"124638054","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
Modularity requirements for optical cross-connects in transport networks 传输网络中光交叉连接的模块化要求
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571793
R. Sabella, E. Iannone
{"title":"Modularity requirements for optical cross-connects in transport networks","authors":"R. Sabella, E. Iannone","doi":"10.1109/LEOS.1996.571793","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571793","url":null,"abstract":"The introduction of an optical path layer in the transport network allows the improving of the transport nodes processing capability, through wavelength routing , besides increase in point-to-point transmission capacity granted by wavelength division multiplexing (WDM) technique. A generic node of a transport network could be designed as an optical crossconnect (OXC) interfacing a digital cross-connect (DXC). In this paper we distinguish between low, medium and high degree of modularity, and discuss the modularity for some relevant OXC architectures. Moreover a new highly modular OXC architecture is proposed.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"167 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":"124664829","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
Probing optical mode structures in a photonic crystal using a near-field scanning optical microscope 用近场扫描光学显微镜探测光子晶体中的光学模式结构
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.565150
J. Hsu, E. B. McDaniel, L. Goldner, R. J. Tonucci, E. L. Shirley, G. Bryant
{"title":"Probing optical mode structures in a photonic crystal using a near-field scanning optical microscope","authors":"J. Hsu, E. B. McDaniel, L. Goldner, R. J. Tonucci, E. L. Shirley, G. Bryant","doi":"10.1109/LEOS.1996.565150","DOIUrl":"https://doi.org/10.1109/LEOS.1996.565150","url":null,"abstract":"We probe the optical mode structure of a two-dimensional triangular photonic crystal using a near-field scanning optical microscope (NSOM). Light from the subwavelength NSOM aperture was coupled through the nanochannel glass (NCG) array photonic crystal and collected in the far-field using a microscope objective. The optical intensity variations as a function of positions in a unit cell were recorded as the sample was moved with respect to the NSOM aperture. We varied the excitation frequency of the NSOM light and the collection objective numerical aperture (NA), in order to distinguish the relation between reciprocal lattice wave-vectors and the transverse momenta of the photons responsible for the NSOM image.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"19 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":"129782342","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
Corneal ablation research at the FDA FDA的角膜消融研究
Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society Pub Date : 1996-11-18 DOI: 10.1109/LEOS.1996.571652
M. Ediger, G. Pettit
{"title":"Corneal ablation research at the FDA","authors":"M. Ediger, G. Pettit","doi":"10.1109/LEOS.1996.571652","DOIUrl":"https://doi.org/10.1109/LEOS.1996.571652","url":null,"abstract":"Summary form only given. Although excimer laser refractive surgery has been available in the United States for a year-and longer elsewhere-the fundamental mechanisms of photoablation are still not fully understood. Consequently, the motivation for corneal ablation research at FDA has been to more fully describe the underlying laser-tissue interactions occurring in ultraviolet laser photoablation. Our investigations have explored the implications of laser-induced-fluorescence on the lens, DNA damage due to ultraviolet radiation and free-radical production. Studies have also been performed to evaluate the pulse-to-pulse stability of ablation, \"incubation\", and the effects of ablation site hydration. Time-resolved reflectivity and transmission measurements have demonstrated dynamic alteration of the optical properties of the ablation site during the laser pulse. Characteristics of the ablation plume including particle size, velocity and volume fraction have been determined by time-resolved Mie scattering measurements. Also, the values for the index of refraction and absorption coefficient (small-signal) of cornea have been obtained by critical angle reflectometry. The results of these studies are reviewed and their clinical implications discussed.","PeriodicalId":332726,"journal":{"name":"Conference Proceedings LEOS'96 9th Annual Meeting IEEE Lasers and Electro-Optics Society","volume":"1 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":"129583266","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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