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设计了一种新颖的60km色散补偿8信道50GHz信道间隔的啁啾光纤Bragg光栅(CFBG)梳状滤波器。采用基于LP算法的IS光纤光栅设计技术,设计出CFBG的折射率调制函数和啁啾分布。根据设计得出的耦合系数分布,采用传输矩阵法分析所设计CFBG的反射谱、时延曲线和群时延抖动。结果表明,所设计的CFBG不仅满足了设计指标要求,性能优良,而且在已知的制作技术条件下可以实现。
A novel chirped fiber Bragg grating (CFBG) comb filter with 60km dispersion compensated 8-channel 50GHz channel spacing is designed. Using the IS fiber grating design technology based on LP algorithm, the refractive index modulation function and chirp distribution of CFBG are designed. According to the design of the coupling coefficient distribution, the transmission matrix method is used to analyze the reflection spectrum, time delay curve and group delay jitter of the designed CFBG. The results show that the designed CFBG not only meets the design requirements, but also performs well under the known production technology.