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提出了一种马赫-曾德尔干涉仪辅助的光纤谐振环新结构,利用传输矩阵法,推导了该器件的输出表达式和半峰全宽(FWHM)表达式。进行了数值模拟,结果显示其具有周期性的窄带带阻滤波特性。分析了马赫-曾德尔干涉仪两臂产生的相差以及耦合器的耦合系数对器件输出谱的影响。研究结果对该器件的实际加工和进一步改善其滤波性能具有参考意义。
A new structure of fiber resonator ring assisted by Mach-Zehnder interferometer is proposed. The output expression and full width at half maximum (FWHM) expression of the device are deduced by transfer matrix method. Numerical simulation results show that it has a periodic narrow-band rejection characteristic. The influence of the phase difference between two arms of the Mach-Zehnder interferometer and the coupling coefficient of the coupler on the output spectrum of the device is analyzed. The research results have reference significance for the actual processing of the device and further improvement of its filtering performance.