| 摘要 |
In a device ( 100 ) for continuously varying the extinction ratio, ER, a laser diode ( 102 ) is connected to a first end of a PZ fiber ( 108 ). At a second end, the PZ fiber is connected to a connector ( 110 ). At the other end of the connector a PM fiber ( 106 ) is connected. The two fibers meet in the connector, which means that opposite end facets of the fibers are located at a very close distance of each other. A rotation is produced by a rotator ( 104 ), mechanically coupled to the connector. The device can be used for: selecting a desired ER of the PM fiber; achieving high accuracy of angular alignment between the principal axes of two PM fibers ( 106, 506 ); evaluating the quality of angular alignment of a splice between two PM fibers made by a splicer; and setting the adjustment/calibration of a PM fiber. |
