We demonstrate a high-power single-frequency master oscillator power amplifier (MOPA) fiber laser. The central wavelength of the single-frequency fiber laser seed is 1 063.8 nm, with a linewidth narrower than 20 kHz and output power of 120 mW. By using two-stage amplification, a single-frequency fiber laser with an output power of 122 W is obtained, and the optical-optical conversion efficiency is 72%. No significant amplified spontaneous emission (ASE) or stimulated Brillouin scattering (SBS) is observed. The output power can be further increased by launching more pump power.
© 2011 Chinese Optics Letters
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3615) Lasers and laser optics : Lasers, ytterbium
Lasers and Laser Optics
Xiaolin Dong, Hu Xiao, Shanhui Xu, Zhiyong Pan, Yanxing Ma, Xiaolin Wang, Pu Zhou, and Zhongmin Yang, "122-W high-power single-frequency MOPA fiber laser in all-fiber format," Chin. Opt. Lett. 9, 111404- (2011)