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Proceedings Paper

Phase modulation signals optimization automatically for suppression of stimulated Brillouin scattering
Author(s): Min Jiang; Yang Ran; Rongtao Su; Pu Zhou
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Paper Abstract

Phase modulation of the signal laser into multiple laser-lines is one of the common methods to suppress the stimulated Brillouin scattering (SBS) effect in high power narrow linewidth fiber amplifiers. In order to achieve optimal effect, the multiple laser-lines should have equal amplitudes. In this paper, the phase modulation signal we employed is the sum of a finite number of sinusoidal signals with different initial phases and different weights. The stochastic parallel gradient descent (SPGD) algorithm is used to search for the optimal initial phases and weights. Through numerical simulation, we obtain homogeneous symmetrical spectra with 11, 19 and 29 lines whose mean square errors of power density are less than 3%.

Paper Details

Date Published: 9 November 2016
PDF: 6 pages
Proc. SPIE 10016, High-Power Lasers and Applications VIII, 100160U (9 November 2016); doi: 10.1117/12.2245671
Show Author Affiliations
Min Jiang, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Yang Ran, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Rongtao Su, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)
Pu Zhou, National Univ. of Defense Technology (China)
Hunan Provincial Collaborative Innovation Ctr. of High Power Fiber Laser (China)


Published in SPIE Proceedings Vol. 10016:
High-Power Lasers and Applications VIII
Ruxin Li; Upendra N. Singh; Robert F. Walter, Editor(s)

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