用分段采样啁啾光栅实现谱相位编码

Using a Step-Sampling-Chirped Grating to Realize Spectral-Phase En/Decoding

设计并实现了基于采样光纤光栅的光码分多址(OCDMA)谱相位编解码器。根据等效啁啾原理,采用分段采样啁啾的方法将宽谱光源的不同频率分量在时域上分离并重新组合,并将地址码信息用等效相移的方式引入到不同的频率分量上实现谱相位编码。采用该方法制作的编解码器具有制作简单、工艺要求低的特点,便于系统应用。对该编解码器的性能进行了计算机仿真并与实测数据进行了对比,结果显示该编解码器具有较好的性能。

A fiber grating based spectral-phase optical code-division-multiple-access （OCDMA） en/decoder was designed and realized. According to equivalent chirp theory, different frequency components of a broad band optical source can be separated and recombined by using step-sampling-chirped method, and phase shifts which carry address code can be introduced into these frequency components by an equivalent method. En-decoders fabricated by this method have some merits such as simple fabrication, low precision requirement. Therefore this method is suitable for system application. Comparison between computer simulation and measured data shows that the en/ decoder has good performance.