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取样光栅可以同时对多个信道进行滤波或色散补偿 ,所以在波分复用 (WDM)系统中有广泛的应用 ,其中周期相位取样光栅是一种很有前途的设计方法 ,但周期取样的方法会使取样光栅的所有信道具有相同的色散补偿能力。提出设计弱非周期性相位取样啁啾光栅的优化方法 ,通过引入一组与信道色散补偿量有关的啁啾控制参数 ,可使不同信道的色散补偿量存在差异。运用该方法设计出弱非周期的取样光栅后 ,可用传输矩阵法来模拟该光栅的复反射谱 ,结果显示通过调整啁啾控制参数 ,可方便地控制不同信道的色散补偿能力 ,从而能实现对光纤链路色散与色散斜率的同时补偿 ,而且取样函数的幅度值的起伏则被完全消除。
Sampling grating can filter or disperse multiple channels at the same time, so it is widely used in WDM system. Periodic sampling grating is a promising design method, but periodic sampling method All channels of the sampled raster will have the same dispersion compensation capability. An optimization method for designing chirped gratings with weak aperiodic phase sampling is proposed. By introducing a set of chirp control parameters related to the amount of chromatic dispersion compensation, dispersion compensation amounts of different channels can be different. Using this method to design a weak aperiodic sampling grating, the transfer matrix method can be used to simulate the complex reflection spectrum of the grating. The results show that by adjusting the chirp control parameters, the dispersion compensation capability of different channels can be conveniently controlled, Fiber link dispersion and dispersion slope at the same time compensation, and the sampling function of the amplitude value of the ups and downs is completely eliminated.