7 September 2011 Spatial and temporal self shaping for large mode area fiber laser system
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Proceedings Volume 8130, Laser Beam Shaping XII; 81300A (2011); doi: 10.1117/12.891255
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States
Abstract
In order to suppress the mode noise of large mode area fiber amplifier system and enhance the signal to noise ratio of the output pulse, spatial and temporal self shaping for large mode area fiber laser system are studied in this paper. For removing off the mode noise, method of beam's spacial self-shaping based on mode matching is used. By the method of mode matching, the cladding mode are removed off clearly. Then a large mode fiber amplifier with a strictly single mode is obtained. For enhancing the signal to noise ratio of the output pulse, method of beam's temoral self-shaping based on Optical Kerr effct in fiber is used. By using Optical Kerr effect, the pulse get nonlinear polarization ratation, which make pulses selfly shaped in time and the ASE pedestal is removed off clearly. As a result, by spatial and temporal self shaping, cleared pulses with a strictly single mode in spatial and cleaned pulses without ASE pedestal are obtained.
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Ying Deng, Jian-jun Wang, Hong-huan Lin, Jing Li, Rui Zhang, Dang-peng Xu, Na Zhu, Zhi-hua Huang, "Spatial and temporal self shaping for large mode area fiber laser system", Proc. SPIE 8130, Laser Beam Shaping XII, 81300A (7 September 2011); doi: 10.1117/12.891255; https://doi.org/10.1117/12.891255
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KEYWORDS
Cladding

Polarization

Fiber amplifiers

Single mode fibers

Fiber lasers

Kerr effect

Signal to noise ratio

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