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光码分多址(OCDMA)技术是实现未来宽带全光接入网的最佳技术之一.提出了一种基于超结构光纤光栅(SSFBG)的光码分多址时域相位编/解码器.编/解码器根据等效相移原理,采用Sinc函数作为采样函数,仅仅利用一块均匀的相位掩模板即实现了多个性能一致的编/解码信道,可以并行对不同波长通道的用户同时进行编/解码,既节省了成本又提高了系统容量.对该编/解码器的结构和性能进行了分析,并进行了计算机仿真.结果表明,对于使用127位Gold序列的编/解码器,各通道自相关峰瓣比(P/W)大于16.3 dB,峰瓣比波动小于0.4 dB,归一化自相关峰值波动小于0.04,各个编码通道取得了与纯相移编/解码器相近的性能,可用于光码分多址/波分复用(WDM)混合系统.
Optical OCDMA (OCDMA) is one of the best technologies for realizing future wideband all-optical access network.An optical code division multiple access time-domain phase encoder / decoder based on SSFBG According to the equivalent phase shift principle, the encoder / decoder uses the Sinc function as the sampling function, and achieves multiple channels with uniform performance by using only one uniform phase mask, which can be performed in parallel to users of different wavelength channels The structure and performance of the encoder / decoder are analyzed and the computer simulation is carried out. The results show that for the encoder / decoder using the 127-bit Gold sequence, each The autocorrelation peak-to-flap ratio (P / W) of the channel is more than 16.3 dB, the peak to peak ratio fluctuation is less than 0.4 dB, the normalized autocorrelation peak fluctuation is less than 0.04, and the performance of each encoding channel is similar to that of the pure phase-shift encoder / Can be used for optical code division multiple access / wavelength division multiplexing (WDM) hybrid systems.