Open AccessExperimental study on coherent beam combination of fiber amplifiers using adaptive power-in-the-bucket cost function
Author(s) -
Chao Geng,
Wen Luo,
Yang Tan,
Hongmei Liu,
Jinbo Mu,
Xinyang Li
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.224202
Subject(s) - optics , tilt (camera) , amplifier , laser beam quality , beam (structure) , fiber laser , power (physics) , piston (optics) , adaptive optics , physics , materials science , optical fiber , wavefront , laser , optoelectronics , laser beams , engineering , mechanical engineering , cmos , quantum mechanics
Beam combination (BC) of fiber amplifiers based on master-oscillator-power-amplifier configuration is an outstanding way to generate high power and high beam quality laser output, where the tip/tilt aberrations among beamlets are considered as a serious influence factor to BC effects. In this paper, a new tip/tilt control method based on adaptive power-in-the-bucket (PIB) cost function is proposed to solve the problem of restricted tip/tilt correcting value in current BC systems. Experimental setup of coherent BC of two-channel 2 W fiber amplifier array is established. Home-made piezoelectric-ring fiber-optic phase-modulator and adaptive fiber-optics collimator are employed to correct piston-and tip/tilt-type aberrations, respectively. The feasibility of proposed tip/tilt control method using adaptive-PIB is demonstrated and nice effect of coherent BC is achieved.