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提出一种级联马赫曾德尔光纤干涉仪 ,它是采用多个 3dB耦合器串联而成的。模拟与分析表明 ,当光纤干涉臂长度差ΔL按顺序取一系列定值时 ,将得到性能良好的梳状出射谱图。其干涉峰的边模抑制比随干涉臂数目的增多而变大。
A cascaded Mach-Zehnder optical fiber interferometer is proposed, which is constructed by using multiple 3dB couplers in series. Simulation and analysis show that when the length difference ΔL of the optical fiber interfering arm takes a series of fixed values in sequence, a good comb output spectrum will be obtained. The side mode suppression ratio of the interference peak increases with the increase of the number of interfering arms.