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提出了一种基于超结构取样光纤光栅的光码多分址(OCDMA)编解码器。以修正Walsh码为例,研究了利用间隔光0.8nm的超结构取样光纤光栅编解码器的实现方法,通过控制温度实现了基于超结构取样光纤光栅的OCDMA编解码器的变址。研究表明:采用该编解码器实现谱域编码,可以避免光纤光栅串联方案中多个光纤光栅接点引起的损耗,易通过应力或温度变化调节中心波长、尺寸小及调谐方便,有利于实用化。
An OCDMA codec based on superstructure sampling fiber Bragg grating (FBG) is proposed. Taking the modified Walsh code as an example, the implementation of the superstructure sampling FBG codec with interval light 0.8nm was studied. The OCDMA codec indexing based on the superstructure sampling FBG was realized by controlling the temperature. The results show that the codec can realize the spectral domain coding, which can avoid the loss caused by multiple FBG contacts in the fiber grating serial scheme. It is easy to adjust the center wavelength through the change of stress or temperature. The size is small and the tuning is convenient.