Coherent Beam Combining of Fiber Amplifiers Using Stochastic Parallel Gradient Descent Algorithm and Its Application

Author

Zhou, Pu ; Liu, Zejin ; Wang, Xiaolin ; Ma, Yanxing ; Ma, Haotong ; Xu, Xiaojun ; Guo, Shaofeng

Author_Institution

Coll. of Optoelectric Sci. & Eng., Nat. Univ. of Defense Technol., Changsha

Volume

15

Issue

2

fYear

2009

Firstpage

248

Lastpage

256

Abstract

We present theoretical and experimental research on coherent beam combining of fiber amplifiers using stochastic parallel gradient descent (SPGD) algorithm. The feasibility of coherent beam combining using SPGD algorithm is detailed analytically. Numerical simulation is accomplished to explore the scaling potential to higher number of laser beams. Experimental investigation on coherent beam combining of two and three W-level fiber amplifiers is demonstrated. Several application fields, i.e., atmosphere distortion compensating, beam steering, and beam shaping based on coherent beam combining using SPGD algorithm are proposed.

Keywords

beam steering; optical fibre amplifiers; parallel algorithms; atmosphere distortion compensation; beam shaping; beam steering; coherent beam combining; fiber amplifiers; laser beams; numerical simulation; scaling potential; stochastic parallel gradient descent algorithm; Beam steering; Fiber lasers; Laser beams; Laser noise; Optical fiber amplifiers; Phased arrays; Power generation; Power lasers; Pump lasers; Stochastic processes; Beam shaping; beam steering; coherent beam combining; fiber amplifier; stochastic parallel gradient descent (SPGD) algorithm;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2008.2010231

Filename

4811111