隔离度？

对于CWDM，DWDM 滤光片，用在光通信里，隔离度在滤光片的波形上表现在哪里，理论公式是什么？

隔离度主要体现在相临通道的串扰！在波形上的体现就是通带对截止带的相差值。

抱歉图片贴不上去。上面成了无能容贴子了

Channel Isolation (dB) is also called Adjacent Channel Crosstalk. Taken from the highest peak of one channel to the point at that channel’s passband boundary where the next channel overlaps, it actually measures how far the channels are separated from one another. This is then commonly used to show just how much unwanted power is coming from adjacent channels.