Title :
Impact of Phase Perturbation on Passive Phase-Locking Coherent Beam Combination
Author :
Li, Zhen ; Zhou, Jun ; He, Bing ; Xue, Yuhao ; Zhou, Pu ; Liu, Chi ; Qi, Yunfeng ; Lou, Qihong ; Xu, Xiaojun
Author_Institution :
Shanghai Key Lab. of All Solid-State Laser & Appl. Tech., Shanghai Inst. of Opt. & Fine Mech., Shanghai, China
fDate :
4/15/2012 12:00:00 AM
Abstract :
The impact of phase perturbation on passive phase- locking coherent beam combination is studied. A ring cavity passive phase-locking coherent beam combination system of an array of two fiber lasers is built. The phase perturbation is experimentally simulated with a phase modulator. Experimental results show that the contrast ratio of central fringe in the far- field beam patterns decreases with an increase of the perturbation frequency or amplitude. Theoretical analysis is given.
Keywords :
fibre lasers; laser cavity resonators; laser mode locking; optical modulation; phase modulation; ring lasers; central fringe; contrast ratio; far-field beam patterns; fiber laser array; passive phase-locking coherent beam combination; perturbation amplitude; perturbation frequency; phase modulator; phase perturbation; ring cavity; Arrays; Cavity resonators; Fiber lasers; Frequency modulation; Laser beams; Optical fiber amplifiers; Phase modulation; Coherent beam combination; fiber laser; passive phase locking;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2185785
