新型高隔离度OADM的光谱及传输实验研究

光插分复用器（ｏｐｔｉｃａｌ ａｄｄ／ｄｒｏｐ ｍｕｌｔｉｐｌｅｘｅｒ，ＯＡＤＭ）是波分复用系统的关键器件之一，光纤光栅器件是ＯＡＤＭ一种较为理想的选择。本文提出了一种新型的ＯＡＤＭ，它由两个环形器，一个光隔离器和两个光纤光栅器件构成。针对基本结构的ＯＡＤＭ和该新型ＯＡＤＭ，本文分别进行了一系列相应的性能实验。通过比较两种结构光插分复用器的Ａｄｄ信号对Ｄｒｏｐ信号的相干干扰、以及Ｄｒｏｐ信号对Ａｄ

Study on the Optical Spectrum and Transmission Characteristics of a Novel High Isolation Optical Add-drop Multiplexer

Optical Add/Drop Multiplexer (OADM) is one of the key compo nents for WDM system.Device based on fiber grating is a promising candidate for OADM.In this paper,a novel optical Add/Drop multiplexer using two circulato rs,one isolator and two fiber gratings is proposed.The experiments to evaluate t he performances of the novel device compared to the ordinary one have been condu cted.The experiment results turn out that the signals produce no crosstalk on th e signals on DROP port.Meanwhile,the signals on DROP port produce no crosstalk o n the signals on ADD port either.Therefore,in the novel device,the interferometr ic crosstalk between the ADD and DROP ports is suppressed completely.One more ad vantage of the device is that the peak reflectivity is not crucial in this novel structure.