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Development of an Integrated Multiwavelength Optical Computing System

集成多波长光学计算系统的开发

基本信息

批准号：
08558022
负责人：
HIGUCHI Tatsuo
金额：
$ 6.78万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

In this project, we investigated the potential of an integrated multiwavelength optical computing system - a parallel computing system that employs optical wavelength components as multiplexable information carriers. We also developed an "adaptive wavelength selector" as a key component for multiwavelength optical computing.1. The adaptive wavelength selector consists of a wavelength detector array and an adaptive computing circuit. We fabricated two different types of wavelength detector arrays employing (1) four distinct dielectric multilayer thin-film filters (integrated on a photodiode array) whose pass-bands are adjusted around 635nm, 690nm, 750nm and 830nm, respectively, and (2) a single wedge-shaped dielectric multilayer thin-film filter which is deposited on a photodiode array and is capable of separating multiple wavelength components ranging from 630nm to 850nm simultaneously. We confirmed that the type (2) array is more suitable for integrated multiwavelength optical computing, since it can be fabricated easily by a single stage of patterning and can discriminate 8 - 16 wavelength components using adaptive computing circuitry.2. The impact of integrated multiwavelength optics on the design of highly parallel interconnection net-works was investigated. We proposed a multiwavelength optical hypercube and showed that the use of 8 - 16 wavelengths makes possible the reduction of network area complexity by the factor of 1/64 - 1/256 in comparison with a single wavelength implementation. We also proposed free-space multiwavelength optical interconnection architectures for point-to-point and broadcast communications, a multiwavelength optical computing system using set-valued logic, and an interconnection-free optical neural network. Also, these ideas are generalized to obtain a paradigm of "multiplex computing" using modulated electric signals for constructing wire-efficient VLSI computing architectures.

在这个项目中，我们研究了集成多波长光学计算系统的潜力 - 一种采用光学波长组件作为可复用信息载体的并行计算系统。我们还开发了“自适应波长选择器”作为多波长光学计算的关键组件。 1．自适应波长选择器由波长探测器阵列和自适应计算电路组成。我们制造了两种不同类型的波长检测器阵列，采用（1）四个不同的电介质多层薄膜滤波器（集成在光电二极管阵列上），其通带分别调整为 635nm、690nm、750nm 和 830nm 左右，以及（2）单个楔形电介质多层薄膜滤波器，沉积在光电二极管阵列上，能够同时分离630nm至850nm范围内的多个波长成分。我们证实类型（2）阵列更适合集成多波长光学计算，因为它可以通过单级图案化轻松制造，并且可以使用自适应计算电路区分8-16个波长分量。2．研究了集成多波长光学器件对高度并行互连网络设计的影响。我们提出了一种多波长光学超立方体，并表明与单波长实现相比，使用 8 - 16 个波长可以将网络区域复杂性降低 1/64 - 1/256。我们还提出了用于点对点和广播通信的自由空间多波长光互连架构、使用集值逻辑的多波长光计算系统以及无互连光神经网络。此外，这些想法被推广以获得使用调制电信号构建线路高效的 VLSI 计算架构的“多路计算”范例。