Infrared and Laser Engineering, Volume. 47, Issue 6, 617001(2018)
Measuring method of fiber focal ratio degradation based on a four-quadrant detector
A method of measuring focal ratio degradation of fibers based on a four-quadrant detector was proposed to improve the measurement accuracy of focal ratio degradation in fibers. The output spot of fibers was re-imaged on to the four-quadrant detector, and the spot position sensitivity of detectors was got through scanning the surface of the four-quadrant detector with a steering mirror, the actual size of the output spot and focal ratio degradation were measured indirectly in turn in this method. The relationship between the spot position sensitivity and the spot radius was deduced in detail. Meanwhile, the influences of the channel width of four-quadrant detectors on the focal ratio degradation were seriously studied.
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Zhang Meiling, Zou Hua, Liu Jinsheng, Wang Linzheng. Measuring method of fiber focal ratio degradation based on a four-quadrant detector[J]. Infrared and Laser Engineering, 2018, 47(6): 617001
Category: 光电测量
Received: Jan. 5, 2018
Accepted: Feb. 15, 2018
Published Online: Sep. 8, 2018
The Author Email: Meiling Zhang (zhangmeiling2153@163.com)