Coherent Polarization Beam Combining of Four High-Power Fiber Amplifiers Using Single-Frequency Dithering Technique

Author

Ma, Pengfei ; Zhou, Pu ; Ma, Yanxing ; Su, Rongtao ; Liu, Zejin

Author_Institution

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

Volume

24

Issue

12

fYear

2012

fDate

6/15/2012 12:00:00 AM

Firstpage

1024

Lastpage

1026

Abstract

We demonstrate a coherent polarization beam combining (CPBC) of four all polarization-maintained high-power fiber amplifiers with a total output power of 60 W, using the single-frequency dithering technique. When the control system is in the closed loop, the intensity profile is steady and the phase noise can be suppressed effectively. The experimental results show that the combining efficiency of the whole system is as high as 90% in the circumstance of imbalance power ratios of the four beams. The technique used in this letter can be straightforwardly scaled to CPBC of a large array of high-power fiber amplifiers.

Keywords

closed loop systems; laser arrays; laser beams; laser noise; optical control; optical fibre amplifiers; optical fibre polarisation; phase noise; closed loop; coherent polarization beam combining; control system; imbalance power ratios; intensity profile; phase noise; polarization-maintained high-power fiber amplifiers; power 60 W; single-frequency dithering technique; total output power; Arrays; Fiber lasers; Laser beams; Optical fiber amplifiers; Optical fiber polarization; Power amplifiers; Power generation; Coherent beam combining; coherent polarization beam combining; fiber amplifiers; polarization combining;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2194139

Filename

6183460