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Proceedings Paper

Study on stimulated Raman scattering in fiber amplifier employing tapered Yb3+ doped fiber
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Paper Abstract

Tapered fiber is expected to effectively suppress nonlinear effects while ensuring excellent beam quality, and may achieve higher power output by breaking through the power limit of ordinary uniform size fiber. Base on the rate equations and the proposed three types of tapered fibers, a nonlinear theoretical model including spectrum, power and stimulated Raman scattering (SRS) is established. Using this model, the SRS characteristics of the three tapered fiber amplifiers are numerically simulated in the condition of keeping same total absorption coefficient of different fibers guaranteed. The simulation results show that the type I fiber has the worst suppression effect on SRS, and the convex type III fiber has the best suppression effect on SRS. When using the backward pumping method, the convex type II fiber can reach almost consistent suppression effect of the convex type III fiber. Theoretical studies show that the use of tapered ytterbium-doped fiber to build fiber amplifiers has a certain suppression effect on SRS in fiber amplifiers, and provides a reference for the selection of fibers in high-power fiber amplifiers.

Paper Details

Date Published: 29 March 2019
PDF: 11 pages
Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110462B (29 March 2019); doi: 10.1117/12.2524428
Show Author Affiliations
Lingfa Zeng, National Univ. of Defense Technology (China)
Chen Shi, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Xiaoming Xi, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Hanwei Zhang, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Xiaolin Wang, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)
Xiaojun Xu, National Univ. of Defense Technology (China)
State Key Lab. of Pulsed Power Lab Technology (China)
Hunan Provincial Key Lab. of High Energy Laser Technology (China)


Published in SPIE Proceedings Vol. 11046:
Fifth International Symposium on Laser Interaction with Matter
YiJun Zhao, Editor(s)

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