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提出了一种基于波长选择开关(WSS)和光纤时延线结构的动态可重构、高码片速率的二维跳频-扩时(WH/TS)编解码器实现方案,阐述了其工作原理并进行了系统实验验证与仿真研究。设计实现了数据速率为2.5 Gbit/s的光码多分址(OCDMA)实验系统,完成了40 km的传输实验,并实际测得编码器的群时延和插损特性,利用VPI软件仿真验证了编解码器的码片速率可达500 GChip/s。实验结果表明:基于WSS和光纤时延线的编解码器不仅能够正确完成脉冲信号的编码和解码,而且传输系统实验的误码率(BER)优于1.00×10-9。
A scheme of two-dimensional frequency hopping-time-varying (WH / TS) codec based on wavelength selective switch (WSS) and fiber delay line structure is proposed. The principle and the system experimental verification and simulation research. The OCDMA experimental system with data rate of 2.5 Gbit / s was designed and implemented, and the 40 km transmission experiment was completed. The group delay and insertion loss of the encoder were measured. The VPI software simulation was used to verify Codec chip rates up to 500 GChip / s. The experimental results show that the codecs based on WSS and optical fiber delay line not only can correctly encode and decode the pulse signal, but also the bit error rate (BER) of the transmission system experiment is better than 1.00 × 10-9.