Architectures for guided-wave optical space switching systems
Architectures for guided-wave optical space switching systems
复制标题
导波光空间交换系统的架构
DOI：
10.1109/mcom.1987.1093615
复制
发表时间：
1987
影响因子：
11.2
通讯作者：
R. Spanke
中科院分区：
文献类型：
--
作者：
R. Spanke
在钛扩散铌酸锂（Ti：LiNbOJ）基片上制备的光空间开关结构已被提出。这些结构已经使用各种光学开关元件构建，包括定向耦合器开关[11]、全内反射（TIR）开关[2]和交叉X开关[3]。此外，在电子和通信领域中发现的许多经典交换架构可以用光域中的光子交换元件来实现。这些架构包括Clos、Benes、Banyan、omega和shuffle网络，仅举几例。所有这些架构都可以光学制造;然而，当扩展到大开关尺寸时，它们都遇到困难，其中它们受到系统衰减、系统信噪比（SNR）和真实的地产的限制。电子域中的最佳交换架构（其中人们试图使交叉点最小化）不是光域中的最佳交换架构（其中另外人们试图使衰减最小化并使SNR最大化）。本文讨论了在选择一个体系结构用作光空间交换结构时所涉及的考虑因素。将定义光开关结构的相关特性。本文还将回顾几种已提出的光开关结构：光交叉开关结构[4]、N级平面结构[5]、Kondo提出的双交叉开关结构[6]、Benes结构[7]、三级Clos网络[SI]以及作者提出的两种类型的多衬底结构[9]。这七个架构将使用不同的架构特征进行比较。
S everal architectures have been proposed for optical space switches fabricated on titanium diffused lithium niobate (Ti: LiNbOJ) substrates. Thesearchitectures have been constructed using various optical switching elements including directional coupler switches[11, total internal reflection (TIR) switches [2], and crossing X-switches [3]. In addition, many of the classical switching architectures found in the electronic and communication domains could be implemented with photonic switching elements in the optical domain. These architectures include the Clos, Benes, Banyan, omega, and shuffle networks, to name a few.All of these architectures could be fabricated optically; however, they all encounter difficulties when expanded to large switch dimensions where they become limited by system attenuation, system signal-to-noise ratio (SNR), and real estate. Optimal switching architectures in the electronic domain, where one attempts to minimize crosspoints, are not the optimal switching architectures in the optical domain, where, in addition, one attempts to minimize attenuation and maximize SNR. This article addresses the considerations involved in selecting an architecture to be used as an optical space switch fabric. The relevant characteristics of optical switch architectures will be defined. This article will also review several proposed optical switch architectures: The optical crossbar architecture [4], an N-Stage Planar architecture [5], a double crossbar architecture proposed by Kondo [6], the Benes architecture [7], threestage Clos networks [SI, and two types of multiple substrate architectures proposed by the author [9]. These seven architectures will be compared using various architecture characteristics.