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对光梳状滤波器加薄膜滤光片型模块制作密集波分复用器 (DWDM )的两种应用方案进行了研究 ,提出了一种提高插损一致性、信道隔离度及减小串扰的结构方案。对新结构方案与常规结构方案进行了理论分析及实验研究 ,结果表明新结构可将级联次级峰由大于 - 30dB降至 - 5 0dB以下。用 16波 5 0GHz的密集波分复用器件拼接进行的实验表明最终器件的插损减小 0 86 9dB ,插损一致性减小 2 0 0 5dB ,相邻信道隔离度提高 1 0 0 4dB ,非相邻信道隔离度提高 4 2 90 3dB ,总串扰提高 1 6 8dB。该方案不仅可以应用到光梳状滤波器与薄膜滤光片型模块拼接高性能的超密集波分复用器件 ,同样也可适用于阵列波导光栅等类型的密集波分复用器件中以降低工艺难度 ,提高性能指标。
Two kinds of applications of DWDM combiner and thin film filter module are studied, and a scheme of improving insertion loss consistency, channel isolation and reducing crosstalk is proposed Structure program. The theoretical analysis and experimental study on the new structure scheme and the conventional structure scheme show that the new structure can reduce the cascade secondary peak from -30dB to -50dB. Experiments conducted with splicing of 16 wave 50GHz DWDM devices show that the insertion loss of the final device is reduced by 866dB, the consistency of insertion loss is reduced by 200%, the adjacent channel isolation is increased by 1.04dB, Non-adjacent channel isolation increased 4 2 90 3dB, total crosstalk increased 1 6 8dB. This scheme can not only be applied to the optical comb filter and the thin-film filter module splicing high-performance ultra-dense wavelength division multiplexing device, also can be applied to arrayed waveguide grating and other types of dense wavelength division multiplexing devices to reduce Process difficulty, improve performance indicators.