406 W Narrow-Linewidth All-Fiber Amplifier With Tm-Doped Fiber Fabricated by MCVD

A homemade 25/400 thulium-doped silica fiber for high power laser and an all-fiber bi-direction pumped thulium-doped master-oscillator power-amplifier (MOPA) configuration with output power of 406 W are presented. The concentration of Tm 2 O 3 and Al 2 O 3 was set as 2.6 wt.% and 1.01 wt.% respectiv...

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Bibliographic Details
Published in:IEEE photonics technology letters 2019-11, Vol.31 (22), p.1779-1782
Main Authors: Liu, Yinzi, Li, Haiqing, Yang, Luyun, Dai, Nengli, Li, Jinyan, Cao, Chi, Xing, Yingbin, Liao, Lei, Cao, Ruiting, Zhang, Fangfang, Chen, Yisha, Wang, Yibo, Peng, Jinggang
Format: Article
Language:English
Subjects:
Aluminum oxide
Amplifiers
Coatings
Doped fibers
Fiber lasers
High power fiber laser
High power lasers
large-mode-area fiber
MCVD
narrow linewidth
Optical fiber amplifiers
Optical fiber communication
Power amplifiers
Power generation
Power lasers
Silicon dioxide
Spontaneous emission
Thermal management
Thulium
thulium doped fiber
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Summary:A homemade 25/400 thulium-doped silica fiber for high power laser and an all-fiber bi-direction pumped thulium-doped master-oscillator power-amplifier (MOPA) configuration with output power of 406 W are presented. The concentration of Tm 2 O 3 and Al 2 O 3 was set as 2.6 wt.% and 1.01 wt.% respectively. Cladding Absorption at 793 nm was measured to be 3 dB/m. The output power of 406 W was obtained by improving coating stripping of splice for thermal management, corresponding to slope efficiency of 54%. The 3 dB spectral linewidth was narrow as 84 pm. Neither amplified spontaneous emission (ASE) nor non-linear effect was observed and the output power only limited by pump power.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2019.2946630