22 W Single Mode Tm-Doped Fiber MOPA
in All-Fiber Format¹

H. Lü, X. Dong, P. Zhou*, H. Xiao, and Z. Jiang

College of Optoelectric Science and Engineering, National University of Defense Technology,
Changsha 410073, China

*e-mail: Zhoupu203@163.com

Received August 4, 2011; in final form, August 6, 2011; published online November 28, 2011

Abstract—We demonstrate an all-fiberized laser in main oscillator power amplification (MOPA) configuration
with 22 W output power and a central wavelength of 1950 nm. The laser is pumped by pigtailed laser diode with
a central wavelength of 793 nm. Strictly single-mode can be obtained and the optical to optical efficiency of the
fiber laser is 40% with respect to the pump power. No power-roll is observed and the power can be scaled
straightforwardly by using more pump sources.

DOI: 10.1134/S1054660X12010136

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