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Frontiers of Optoelectronics

Front Optoelec Chin    2011, Vol. 4 Issue (4) : 426-429     DOI: 10.1007/s12200-011-0174-5
Efficient, 62.5 Watts all-fiber single-mode 1091 nm MOPA laser
Jiangming XU, Xiaolin DONG, Jinyong LENG, Pu ZHOU, Jing HOU()
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
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A high power all-fiber single-mode 1091 nm laser is constructed in master oscillator power amplifier (MOPA) configuration. The home-made seed source is an Yb3+-doped fiber ring laser with 22.5 mW maximal output power. A two-stage pre-amplification configuration is employed to boost seed power to 3 W. The ultimate output power of the main amplification stage is 62.5 W, corresponding to an optical-to-optical conversion efficiency of 78.1%. No residual pump light or amplified spontaneous emission (ASE) is observed under maximal output power. Because of the using of fiber Brag grating (FBG) to select frequency in seed laser, the full width at half maximum (FWHM) linewidth of output light is narrower than 0.1 nm.

Keywords all-fiber      high efficiency      single-mode      master oscillator power amplifier (MOPA)      fiber amplifier      1091 nm     
Corresponding Authors: HOU Jing,   
Issue Date: 05 December 2011
 Cite this article:   
Xiaolin DONG,Jinyong LENG,Pu ZHOU, et al. Efficient, 62.5 Watts all-fiber single-mode 1091 nm MOPA laser[J]. Front Optoelec Chin, 2011, 4(4): 426-429.
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Xiaolin DONG
Jinyong LENG
Jing HOU
Jiangming XU
Fig.1  Schematic of all-fiber 1091 nm MOPA laser
Fig.2  Schematic of home-made 1091 nm seed laser
Fig.3  Characters of seed laser. (a) Output power of seed laser vs pump power; (b) spectrum of the seed laser
Fig.4  Properties of the main amplification stage. (a) Output power of the amplified laser vs pump power; (b) optical-to-optical conversion efficiency of the amplified laser vs pump power; (c) spectrum of the amplified laser
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