Xiaolong Chen, Jianhua Wang, Xiang Zhao, Gang Bai, Weichao Gong, Kai Liu, Chun Zhao, Xuan Li, Haoyang Pi, Jinyan Li, Yifeng Yang, Bing He, Jun Zhou. 307 W high-power 1018 nm monolithic tandem pump fiber source with effective thermal management[J]. Chinese Optics Letters, 2017, 15(7): 071407
- Chinese Optics Letters
- Vol. 15, Issue 7, 071407 (2017)
Fig. 1. Experimental setup of the 1018 nm fiber laser. LMA: large mode area.
Fig. 2. (Color online) Insert loss of the MFA.
Fig. 3. (Color online) Simulated emission spectra for active fiber lengths of 1, 1.5, and 2 m.
Fig. 4. (Color online) (a) Emission spectrum of 1018 nm YDF with the gain fiber lengths of 1.5 and 2 m; (b) output laser power at 1018 nm versus pump power when the gain fiber length is 1.1 m (inset is the corresponding emission spectrum); (c) beam quality evaluation.
Fig. 5. Thermal management of the HR FBG. (a) Configuration of the heat sink; (b) thermal image of the HR grating with output power of 200 W and no thermal management; (c) thermal image of the HR grating with output power of 307 W and effective thermal management.
Fig. 6. Thermal management of the CLS. (a) The relation between attenuation and the refractive index of recoating polymers; (b) thermal image of the CLS with 60 W stripped off.
Fig. 7. Measurement of the power stability during 1800 s.
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