Experimental Phase Stabilization of a 397-Channel Laser Beam Array Via Image Processing in Dynamic Noise Environment

被引：25

作者：

Chang, Qi ^{[1
]}

Hou, Tianyue ^{[1
]}

Long, Jinhu ^{[1
]}

Deng, Yu ^{[1
]}

Chang, Hongxiang ^{[1
]}

Ma, Pengfei ^{[1
]}

Su, Rongtao ^{[1
]}

Ma, Yanxing ^{[1
]}

Zhou, Pu ^{[1
]}

机构：

[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2022年 / 40卷 / 19期

基金：

中国国家自然科学基金;

关键词：

Coherent beam combining; fiber laser array; phase stabilization; image processing; FIBER LASERS; HIGH-POWER; COMBINATION; AMPLIFIERS; TURBULENCE; LOCKING; FUTURE;

D O I：

10.1109/JLT.2022.3195822

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A phase-locking module is firstly validated for coherent beam combining (CBC) systems of near 400 laser beams in dynamic noise environment. It is based on a 2-dimensional image processing in the phase-locking module to calculate the piston phase of the laser array in the CBC systems. Through the designed phase-locking module, the piston phase distribution of the laser array can be corrected simultaneously, accurately, and rapidly as fast as similar to 2000 Hz. Proof-of-concept experiment is demonstrated for coherent beam combining of up to 397 fiber laser emitters based on the designed phase-locking system to correct the phase noises measured from a real fiber amplifier below 1 kHz. The ratio of power in the Airy disk is as high as 59.51 % when the phase compensation is carried out for the piton phase noise measured in a kW-class fiber amplifier. The phase residue error in the close-loop is better than lambda/31.

引用

页码：6542 / 6547

页数：6