Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1534610 | Optics Communications | 2014 | 7 Pages |
Abstract
A novel active phase locking technique base on single detector is proposed and demonstrated experimentally. Using dual-level rectangular-wave phase modulation and time division multiplexing, the proposed multi-level phase dithering technique can achieve the same phase error signal as single/multi-frequency dithering technique, but without coherent demodulation circuit. Experimental investigation on coherent beam combination of 10 fiber laser beams is successfully demonstrated, with imposing an additional phase disturbances to mimic the phase noises in the high power fiber amplifiers. The combining efficiency with modulated phase noise is achieved above 97.55% and the accuracy of phase control is improved to λ/42 rms. One of the application fields, i.e., beam steering based on coherent beam combining using square wave dithering algorithm are proposed.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xuan Tang, Zhimeng Huang, Dayong Zhang, Xiaojun Wang, Jianfeng Li, Cangli Liu,