为了实现高速光信号的降速处理, 提出了一种基于级联半导体光放大器环镜(SLALOM)的光串并转换器, 用于实现将高速串行光脉冲信号转换成低速并行光脉冲信号.该光串并转换器采用串联SLALOM组成, 将前一级SLALOM的输出作为后一级SLALOM的输入; SLALOM之间的光传播时延为输入光信号比特周期; 设置控制光与信号光脉冲时序, 实现各级SLALOM光脉冲并行输出.通过采用1×10光串并转换器实现将80 Gb/s串行信号转换为10路8 Gb/s并行信号, 并对控制、信号脉冲光功率和时间偏移量器件参量进行了优化.对于1×10光串并转换器, 端口接收灵敏度差异小于10 dB.该光串并转换器光功率损耗小、易于扩展并行端口数目, 可用于光通信领域中的高速解复用、光信号处理和光交换系统中.

In order to reduce the bitrate of high-speed optical signal, a novel all-optical serial-to-parallel converter is proposed, which is based on the cascaded Semiconductor Laser Amplifier in a Loop Mirror(SLALOM), to be used to convert high speed serial optical signal to multi-output low-speed parallel optical signal. The converter adopts the structure of the cascaded SLALOMs, the output of the previous SLALOM connects to the input of the next one with the optical propagation delay time between them equaling to the bit period of the input optical pulse signal. Morever, the particular timing of optical control and signal pulses is designed to guarantee appropriate outputs. The feasibility is verified by converting 80 Gb/s serial optical signal to ten 8 Gb/s parallel outputs by using the designed 1×10 all-optical serial-to-parallel converter. The device parameters are optimized including the optical power of control / signal pulse and the time offset of them. The difference of the receive sensitivity values of all output ports is less than 10 dB. Comparing with the traditional parrallel structure, the proposed converter has the advantage of lower optical power loss, and it′s easier to extend parallel port numbers, which is available for the applications including high-speed demultiplexing, optical information processing and optical switching system.