一种新型光学隔离器包含光纤法拉第旋光器而不是普通晶体。当光通过平行磁场中的石英光纤时，偏振便逐渐转动。对于足够长的光纤，偏振面可移动45”或更多。而当光反向通过光纤时，偏振不会反向转动，因此，在增添适当取向的入射和击射偏振器情况下，该旋转器可起着单路光阀的? A new type of optical isolator contains a fiber Faraday rotator instead of an ordinary crystal. When light passes through a quartz fiber in a parallel magnetic field, the polarization gradually rotates. For a sufficiently long fiber, the plane of polarization can be shifted by 45 "or more, and when light passes back through the fiber, the polarization does not rotate in the opposite direction, so that with proper orientation of incident and shot polarizers, this rotation Can play a single light valve?