摘要
利用光学矩阵方法 ,给出了由偏光镜、λ/ 2波片和λ/ 4波片组成的波片型光隔离器的正向导通、反向隔离机理 ,分析了波片延迟量的偏差和波片方位角的定位精度对隔离度的影响 结果表明 ,要获得大于 30dB的隔离度 ,应分别将λ/ 2、λ/ 4波片的延迟偏差控制在± 4°、± 2°以内 ,方位角的定位偏差应不超过± 0 .4°、± 0 .
The optical isolator discussed in this paper consists of a polarizer, a λ/2 wave plate and a λ/4 wave plate. With Jones matrix vector representation, the mechanics of forward transmission and backward isolation is given. And the relationship between isolation ratio and the defer deviation of the retardation sheets and the positioning accuracy of the angle of position is also analyzed. In order to obtain the isolation ratio above 30 dB, the permissible defer deviation range of λ/2 and λ/4 should be controlled respectively among ±4° and ±2°. And the positional deviation range should be among ±0.4° and ±0.8°.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2004年第7期830-834,共5页
Acta Photonica Sinica
关键词
琼斯矩阵
隔离度
延迟偏差
方位角
Jones matrix
Isolation ratio
Retardation deviation
Angle of position
