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4 March 2022 Over 700 W random distributed feedback Raman laser based on graded-index fiber with brightness enhancement
Chenchen Fan, Tianfu Yao, Hu Xiao, Jiangming Xu, Jinyong Leng, Pu Zhou, Alexey A. Wolf, Ilya N. Nemov, Alexey G. Kuznetsov, Sergey A. Babin
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Proceedings Volume PC11981, Fiber Lasers XIX: Technology and Systems; PC119810C (2022) https://doi.org/10.1117/12.2606787
Event: SPIE LASE, 2022, San Francisco, California, United States
Abstract
A random distributed feedback Raman fiber laser (RRFL) based on graded-index (GRIN) fiber with brightness enhancement (BE) is demonstrated. Pumped by temporally stable amplified spontaneous emission source, the output power of 722 W at 1130 nm is achieved thanks to the effective suppression on higher-order Stokes generation. Besides, benefiting from the beam cleanup effect in GRIN fiber, the beam quality factor M2 of the signal laser at maximum output is 4.65 corresponding to the BE factor of 8.9. To the best of our knowledge, this is the record output power of RRFL based on GRIN fiber with BE.
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Chenchen Fan, Tianfu Yao, Hu Xiao, Jiangming Xu, Jinyong Leng, Pu Zhou, Alexey A. Wolf, Ilya N. Nemov, Alexey G. Kuznetsov, and Sergey A. Babin "Over 700 W random distributed feedback Raman laser based on graded-index fiber with brightness enhancement", Proc. SPIE PC11981, Fiber Lasers XIX: Technology and Systems, PC119810C (4 March 2022); https://doi.org/10.1117/12.2606787
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KEYWORDS
GRIN lenses
Raman spectroscopy
Fiber lasers
Graded index fibers
Fiber Bragg gratings
Multimode fibers
Oscillators
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