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对三种不同结构的光纤光栅和环形器组成的光分插复用器的同频串扰进行了实验研究。实验表明 ,与常规的Ⅰ型结构光分插复用器相比 ,Ⅱ型和III型结构中由上载端泄漏到下载端的同频串扰分别减少了 2 4.4dB和39.3dB ,由下载端泄漏到上载端的同频串扰分别减少了 2 3 .6dB和 2 4.6dB。
The same frequency crosstalk of optical add / drop multiplexer composed of three kinds of fiber gratings and circulators with different structures was studied experimentally. Experiments show that, compared with the conventional Type I optical add / drop multiplexer, the same-frequency crosstalk leakage from the carrier to the carrier in the Type II and Type III structures is reduced by 2 4.4 dB and 39.3 dB, respectively, from the download end to The same frequency crosstalk on the upload side was reduced by 23.6 dB and 2 4.6 dB, respectively.