基于MZI和取样光栅的可调谐光分插复用器

Mach-Zehnder Interferometer and Sampled Gratings Tunable Optical Add-drop Multiplexer

摘要:

提出一种基于马赫－曾德尔干涉仪（MZI）和取样光纤布拉格光栅（SFBG）的新型光分插复用器（OADM），它由两个并联马赫－曾德尔干涉仪和四个取样光纤布拉格光栅组成。对该光分插复用器的输出特性进行了理论仿真，研究得出通道间隔为0.8nm时下载和输出端口的光谱特性，研究发现干涉仪的臂长差和取样光栅的中心波长差是决定光分插复用器输出特性的主要因素。调节一个马赫－曾德尔干涉仪上的臂长差和取样光栅的中心波长，可以实现信号下载可调功能或直通功能。

Abstract:

A novel optical add-drop multiplexer output (OADM) structure, consisting of two parallel Mach-Zehnder interferometers and four sampled gratings, is proposed based on Mach-Zehnder interferometers and sampled fiber Bragg gratings (SFBG). The OADM output characteristics were theoretically simulated, and the spectral characteristics of drop port and output port were researched with the channel spacing of 0.8nm. It is found that the path-length difference of the interferometers and the center wavelength of the sampling gratings play important roles in determining the output characteristics of OADM, by adjusting which, adjustable signal channels drop or pass can be achieved.