Coherent Beam Combining with Second-Harmonic Generation Optimized with Adaptive Phase Control

Author

Guan, Yefeng ; Zhang, Peiqing ; Xie, Xiangsheng ; Zhou, Jianying ; Wong, Kam Sing

Author_Institution

State Key Lab. of Optoelectron. Mater. & Technol., Sun Yat-sen Univ., Guangzhou, China

Volume

47

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

348

Lastpage

353

Abstract

A theoretical and experimental study of phase-controlled beam combining based on noncollinear frequency doubling is described. Optimized second-harmonic power and improved output intensity distribution are simultaneously achieved by a closed-loop phase control system via an adaptive algorithm. It is shown that the profile of the combined beam at the second-harmonic with 12 noncollinear frequency inputs can be shaped to a near-fundamental Gaussian mode, with a power enhancement of more than two orders of magnitude, compared to the second-harmonic signal generated with a single beam.

Keywords

adaptive control; optical harmonic generation; phase control; adaptive algorithm; adaptive phase control; closed-loop phase control system; coherent beam combining; intensity distribution; noncollinear frequency doubling; phase-controlled beam combining; power enhancement; second-harmonic generation; second-harmonic signal; Arrays; Crystals; Frequency conversion; Laser beams; Optimized production technology; Ultrafast optics; Adaptive optics; coherent beam combining; nonlinear wave mixing; phase control; spatial light modulator;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2010.2089498

Filename

5720474