High-Power Coherent Beam Combining of Two Photonic Crystal Fiber Lasers

Author

Li, Jianfeng ; Duan, Kailiang ; Wang, Yishan ; Zhao, Wei ; Zhu, Jianhua ; Guo, Yongkang

Author_Institution

Dept. of Phys., Sichuan Univ., Xian

Volume

20

Issue

11

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

888

Lastpage

890

Abstract

Coherent beam combining of two large mode area photonic crystal fiber (LMA PCF) lasers is studied experimentally by using a self-imaging technique. Steady interference strips with high visibility of 35% are observed in high-power operation, which demonstrates the obvious advantages of the LMA PCF over the conventional double-clad fiber in coherent beam combining. Experiments also show that the reflectivity of coupling output mirror affects the coherent output power. The maximum coherent output power of 80 W with approximate 90% combining efficiency is achieved when the pump power is 130 W and the reflectivity of coupling output mirror is 5%.

Keywords

fibre lasers; photonic crystals; fiber lasers; high power coherent beam combining; photonic crystal; power 130 W; power 80 W; self-imaging technique; Fiber lasers; Laser beams; Laser modes; Optical feedback; Optical interferometry; Optical resonators; Optical surface waves; Photonic crystal fibers; Power generation; Power lasers; Coherent combining; high-power fiber lasers; photonic crystal fiber (PCF); self-imaging resonator;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2008.922342

Filename

4509498