光隔離器

 

 

Purpose of an Isolator

Isolator is composed of a Farady rotator,which consists of a magneto-optic material contained in a magnetic field, and two suitably arrayed polarizers.The purpose of an isolator is to reduce or eliminate the effects of optical feedback, which could cause frequencey shift, limitation of modulation bandwidth, amplitude fluctuation,noise and even damage.It allows a light to pass through in one direction only.

Operation of an isolator
The forward mode

The incident light,whether or not polarized, passes through the input polarizer and becomes a linearly polarized light. When entering the Faraday rotator,the polarization plane of the linearly polarized light is rotated at 45o. It then enters the output polarizer which is tilted 45o. The light passes through the isolator and makes reflections, which constitute feedback.

The reverse mode

When re-entering the isolator,the feedback passes through the the output polarizer, where the feedback is re-polarized at 45o. It then enters the Faraday rotator and is rotated 45o in the same direction as the initial tilt. By making a total of 90o with respect to the input polarizer, the light is completely shut out here.

 
曾道长六肖期期准14期开奖 旺彩电脑版 彩名堂计划软件2.0 后二重庆时时彩怎么买稳赚 pk10赛车定位走势方法 最稳定玩法北京pk10 欢乐生肖彩票 时时彩评测网 山西时时彩 pk10极速赛车官网开奖 福建时时外围 选号pk10走势图查询 快乐时时是全国开奖号码 快速时时计划网 pk10人工计划群 海南彩票七星彩开奖结果