Title :
310-W Single Frequency Tm-Doped All-Fiber MOPA
Author :
Xiong Wang ; Xiaoxi Jin ; Weijun Wu ; Pu Zhou ; Xiaolin Wang ; Hu Xiao ; Zejin Liu
Author_Institution :
Coll. of Optoelectron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
We present a high-power single frequency (SF) Tm-doped fiber amplifier employing all-fiber master oscillator power amplifier (MOPA) configuration. An SF fiber laser with ultrashort cavity and output power of ~40 mW was used as the seed laser of the MOPA, and the central wavelength located at ~1971 nm. The final output power of the MOPA reaches 310 W with slope efficiency of 0.56, and no amplified spontaneous emission or parasitic lasing is observed. The stimulated Brillouin scattering threshold is not reached yet, and the output power is only pump limited. This is the first demonstration, to the best of our knowledge, on an SF Tm-doped all-fiber MOPA with output power exceeding 300 W.
Keywords :
laser beams; laser cavity resonators; optical fibre amplifiers; optical pumping; thulium; all-fiber master oscillator power amplifier configuration; high-power single frequency Tm-doped fiber amplifier; output power; power 310 W; seed laser; single frequency Tm-doped all-fiber MOPA; single frequency fiber laser; slope efficiency; ultrashort cavity; Fiber lasers; Laser excitation; Optical fiber amplifiers; Power amplifiers; Power generation; Power lasers; Pump lasers; Infrared and far-infrared lasers; Laser amplifiers; single-mode lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2390253
