Optical Computing最新文献_第6页

Dual Scale Topology Opto-Electronic Processor (D-STOP): Comparative Analysis and Technological Feasibility 双尺度拓扑光电处理器(D-STOP):比较分析与技术可行性

Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.tud1

A. Krishnamoorthy, J. Ford, G. Marsden, G. Yayla, S. Esener

引用次数: 0

Enhanced photorefractive effects with a de field and moving grating in GaP at 633 nm 在633 nm处，移动光栅和de场增强了GaP的光折变效应

Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me2

Jian Ma, Y. Taketomi, Y. Fainman, J. Ford, Sing H. Lee

{"title":"Enhanced photorefractive effects with a de field and moving grating in GaP at 633 nm","authors":"Jian Ma, Y. Taketomi, Y. Fainman, J. Ford, Sing H. Lee","doi":"10.1364/optcomp.1991.me2","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me2","url":null,"abstract":"Photorefractive (PR) devices have found applications in optical computing, image processing and pattern recognition[1–3], because PR materials provide unique features such as real time operation, optical gain, storage, nonlinear operations, phase conjugation and correlation. New PR materials are being investigated in order to meet the device and system requirements of sensitivity, speed, and operation wavelength (e.g., response to the near infrared spectral range for systems operated with semiconductor lasers). Compound semiconductors may satisfy these requirements. For example, optical signal amplification by two-beam coupling and amplified phase-conjugate beam reflection by four-wave mixing have been reported in GaAs[4] and InP[5] at the wavelength of 1.06 μm. Recently, GaP[6–7] was shown to possess a relatively weak PR effect in the spectral range of 0.6 to 0.9 μm. In this manuscript we report enhancement of the PR effect in GaP using an externally applied electric field and moving grating. In particular, two- and four-wave mixing experiments were used to demonstrate a gain coefficient of Γ = 1.9 cm–1 and a phase conjugate reflectivity, R= 4.5%. In addition, several figures of merit of GaP, i.e., steady-state index change, absorption coefficient, response time and PR sensitivity were characterized.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117216060","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

Integrated array of self electro-optic effect device logic gates 集成阵列自电光效应器件逻辑门

Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.ma2

A. Lentine, L. Chirovsky, M. Focht, J. Freund, G. Guth

{"title":"Integrated array of self electro-optic effect device logic gates","authors":"A. Lentine, L. Chirovsky, M. Focht, J. Freund, G. Guth","doi":"10.1364/optcomp.1991.ma2","DOIUrl":"https://doi.org/10.1364/optcomp.1991.ma2","url":null,"abstract":"Arrays of symmetric self electro-optic effect devices (S-SEEDs) have been made with low operating energies and fast switching speeds [1,2]. The device has the characteristics of a set-reset latch, although it can be made to do logic functions such as a NOR gate by presetting the state of the device before the application of the data inputs [3]. Logic gates that can perform more complex functions without preset beams may be realized by using electrically connected detectors configured like transistors in NMOS or CMOS circuits together with an output S-SEED to provide the output beams [4]. In this paper, we describe the first integrated arrays of these logic gates, each of which can perform the four basic logic functions without the use of preset beams. Each logic gate in the array consists of six quantum well p-i-n diodes, four input diodes configured similar to transistors in a CMOS NOR gate, and two output diodes (i. e. a S-SEED) that provide a set of complementary output beams. Like the S-SEEDs, this device has time sequential gain, in which the low power input beams set the state of the device and a set of equal higher power clock beams subsequently read the state. This device retains many desirable qualities of the S-SEED such as signal regeneration and retiming, wavefront restoration, and operation over several decades in power levels due to its differential nature. Because the logic gate contains only quantum well diodes, the same batch fabrication procedures [1] used for S-SEED arrays were used to make the arrays of these devices.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128978219","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

Spatial Noise Reduction in Array Illuminators 阵列照明灯的空间降噪

Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.mc1

A. Lohmann, S. Sinzinger

引用次数: 2

Fault-Tolerant Computing on POEM 基于POEM的容错计算

Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me12

D. Lu, Ting-Ting Y. Lin, F. Kiamilev, S. Esener, Sing H. Lee

{"title":"Fault-Tolerant Computing on POEM","authors":"D. Lu, Ting-Ting Y. Lin, F. Kiamilev, S. Esener, Sing H. Lee","doi":"10.1364/optcomp.1991.me12","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me12","url":null,"abstract":"Wafer scale integration (WSI) promises to realize a complete multiprocessing system on the same wafer and eliminates the expensive steps required to dice and bond. The fundamental belief is that the internal connection between chips on the same wafer are more reliable and have a smaller propagation delay than external connections1. However, achieving a high yield has proven to be a major challenge. Rather than aiming for 100% yield, the realistic solution is to determine the defective components on the wafer and replace them with spares. Which means, the design should be tolerant to faults developed during the manufacturing process. Moreover, faults occur during system operation, be it component failure, improper operation, or environmental factors. Therefore, a mean to detect these unexpected faults and recover from them is necessary to minimize down time and unavailability. Long and periodic system downs are a luxury that cannot be afforded for computers used in critical applications. In this paper, we show that the introduction of optical interconnection techniques into a multiprocessor environment (e.g. the Programmable Optoelectronic Multiprocessor, POEM) enables efficient implementation of fault-tolerant techniques.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127001320","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

Multiplexed Hybrid Interconnection Architectures 多路混合互连架构

Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.mc3

H. Ozaktas, J. Goodman

引用次数: 3

Closed Loop Optical Disk Based Associative Memory 基于闭环光盘的联想存储器

Optical Computing Pub Date : 1992-05-12 DOI: 10.1364/optcomp.1991.wa4

M. Neifeld, D. Psaltis

引用次数: 0

Photonic Implementations of Neural Networks 神经网络的光子实现

Optical Computing Pub Date : 1992-01-03 DOI: 10.1364/optcomp.1995.otub1

B. K. Jenkins, A. Tanguay

{"title":"Photonic Implementations of Neural Networks","authors":"B. K. Jenkins, A. Tanguay","doi":"10.1364/optcomp.1995.otub1","DOIUrl":"https://doi.org/10.1364/optcomp.1995.otub1","url":null,"abstract":"Several broad classes of neural networks comprise distributed, nonlinear, dynamical systems in which large numbers of relatively simple processing elements (neuron units) are densely interconnected. The interconnections are often configured such that the interconnection weights are adaptive and contain the learned memories and behaviors of the system. Advanced optical interconnection techniques are being developed that can potentially be used in conjunction with optoelectronic neuron units to implement photonic neural-like computational modules (e.g., Fig. 1) with relatively large array sizes (105 to 106 neuron units) and a high degree of connectivity (fan-outs and fan-ins of 104 to 106, with 109 to 1012 total interconnections). A key open question is whether the high bandwidths (potentially 100 MHz or more) available from hybrid optoelectronic spatial light modulators (SLMs) can be effectively combined with such high density volume holographic optical interconnections (dynamically recorded in photorefractive materials) to provide enhanced computational throughput capacity as well as complex neural network simulation capability. A second key open question is whether advanced electronic/photonic packaging technologies can provide capability for system-level integration of highly compact multichip modules that exhibit both local (multi-plane) and global interconnections (Fig. 2).","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130606855","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

Optical Modular Architectures for Multi-Layer Bam with 2-Dimensional Patterns 二维模式多层Bam的光模块架构

Optical Computing Pub Date : 1991-11-01 DOI: 10.1364/optcomp.1991.me10

Soo-Young Lee, H. J. Lee, Sang-Yung Shin

{"title":"Optical Modular Architectures for Multi-Layer Bam with 2-Dimensional Patterns","authors":"Soo-Young Lee, H. J. Lee, Sang-Yung Shin","doi":"10.1364/optcomp.1991.me10","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me10","url":null,"abstract":"After the first demonstration of optically-implemented Hopfield model [1] many neural network models have been investigated for large-scale optical implementation [2-8]. The 1-dimensional Hopfield model had been extended for 2-dimensional patterns [2], and optical implementation of bidirectional associative memory (BAM) [3-5] and quadratic associative memory [6,7] had been investigated. Adaptive neural network models such as multi-layer perceptron [8] had also been demonstrated. However performance of the simple Hopfield model and BAM is very limited, and many adaptive learning algorithms are too complicated to be implemented efficiently by optics. Also, when a new pattern need be added to the existing system, the correlation matrix learning rule of both the Hopfield model and BAM requires simple addition to existing interconnection weights, while error back-propagation learning rule for multi-layer perceptron requires to bring over all the previously stored patterns. Recently we had extended the BAM into multi-layer architecture, of which performance is quite comparable to that of multi-layer perceptron [9]. This multi-layer BAM (MBAM) still utilizes correlation matrices for easy optical implementation with outer-product matrix formation or inner-product recall. In this paper optical system architectures for the MBAM are presented for 2-dimensional patterns, and several implementation issues are discussed.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127288208","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

The First Demonstration of an Optical Learning Chip 光学学习芯片的首次演示

Optical Computing Pub Date : 1991-03-05 DOI: 10.1364/optcomp.1991.wb2

K. Kyuma, Y. Nitta, J. Ohta, S. Tai, Masanobu Takahashi

引用次数: 3