System and Device Research In All-Optical Wavelength-Routed Switching Networks

9318446 Chang-Hasnain我们提出了一种基于创新地址编码方案的全光自路由交换网络。拟议的工作包括在网络、系统和设备层面进行协调一致的研究工作。“全光”交换是通过给数据包加上一个由一系列波长组合组成的地址码来完成的，这样交换就可以简单地通过感知波长来完成，而不需要首先将高速数据转换为电子形式。自路由是通过感知数据包中地址标签的波长内容来实现的。在多级交换网络的每个交换阶段，交换节点执行锁存功能，该功能根据波长地址码的某一部分将数据包的全部内容定向到适当的输出端口，直到到达最终目的地。在该方案下，可以容纳大量的地址码，并且不像传统的波分复用网络那样受可用波长数量的限制。提出的工作包括研究基于表面发射激光阵列的合适的多波长激光发射机，根据输入信号的波长标签对输入光信号进行分类和路由到适当输出端口的交换节点，基于开关半导体放大器阵列的光交叉开关，以及这种类型的全光自路由网络的系统/架构研究。计划使用上述新组件的小规模示范网络，作为调查系统相关问题以及确定交互设备和组件在真实交通环境下的性能的测试平台。* * *

9318446 Chang-Hasnain We propose a novel all-optical, self-routing switching network based on an innovative address coding scheme. The proposed work includes concerted research efforts at the network, systems and device levels. "All-optical" switching is accomplished by tagging the data packet with an address code consisting of a serial combination of wavelengths, so that switching can be done simply by sensing the wavelength without the need for first converting the high-speed data to electronic form. Self-routing is exercised by sensing the wavelength content of the address tag in a data packet. At each switching stage of a multistage switching network, the switching node performs a latching function which directs the entire content of the packet to the appropriate output port based on a certain section of the wavelength address code, until the final destination is reached. Under this scheme, a large number of address codes can be accommodated and is not limited by the number of available wavelengths as in conventional wavelength division multiplexed networks. The proposed work consists of investigation of a suitable multiwavelength laser transmitter based on surface emitting laser arrays, a switching node which sorts and routes incoming optical signals to appropriate output ports based on the wavelength tag of the input signal, optical crossbar switches which are based on switched semiconductor amplifier arrays, and system/architectural studies of this type of all-optical self-routing network. A small-scale demonstration network is planned which uses the novel components described above, which serves as a testbed for investigating systems related issues as well as ascertaining the performance of the interacting devices and components under real traffic environments. ***