ATM photonic switching systems with Tera-bits/sec throughput

光子ATM交换系统将在21世纪初投入使用。针对这一目标，光子AMC被认为是最合理的方法，它是一种结合AHM （ATM虚拟电路处理模块）实现大规模ATM交换系统的连接器。我们提出的多重OFDM自路由ATM交换系统在光子AMC中具有广阔的应用前景。[1,2]实现光子ATM的一个重要问题是如何实现光子ATM单元的缓冲存储器。本课题提出一种单片光子ATM单元缓冲存储器，并在模拟离散模型[3]中进行了演示。单片单元缓冲器的基本结构是基于PLC混合集成模块，包括光子环路、WDM DEMUX和波长转换器。采用可编程控制器（PLC）上的AWG DEMUX和采用2.5 Gb/s DFB/APD收发模块的三组波长转换器组成模拟单元缓冲区的离散模型，演示了三个WDM ATM单元以150 Mb/s的比特率存储。采用可调谐激光源HP8168B进行输入光子ATM电池的生成。我们还分析了多跳光子AMC，提出了用于波长路由器的Mach-Zenhder晶格光电路，该电路比AWG路由器[5]具有更好的通带特性。

Photonic ATM switching systems should be in service at the beginning of the 21st century. For this target, photonic AMC is believed as the most reasonable approach, which is a kind of connector to realize a huge scale of ATM switching system by combinig AHM (ATM Virtual Circuit Handling Module). Our proposal of Multi-fold OFDM Self-Routing ATM Switching System is promising for photnic AMC.[1, 2] One of the important issue in realizing photonic AMC is how to realize photnic ATM cell buffer memory. In this project, one chip photonic ATM cell buffer memory is proposed and demonstrated in a mock discrete model[3].The basic structure of one chip cell buffer is based on PLC hybrid integration module including a photonic loop, WDM DEMUX and wavelength converters. An AWG DEMUX on PLC and three sets of wavelength converters using 2.5 Gb/s DFB/APD tranciever modules were combined to the mock discrete model of cell buffer, which demonstrated three WDM ATM cells storage at bit rate of 150 Mb/s. Tunable Laser Source HP8168B was used for input photonic ATM cell generation. We also analyzed Multihop Photonic AMC to propose Mach-Zenhder Lattice optical circuits for wavelength routers, which is improved in passband characteristics than AWG routers[5].