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Proceedings Paper

Coherent beam combining of stimulated Brillion scattering based multiwavelength lasers
Author(s): Xiaolin Wang; Pu Zhou; Hongwei Chen; Yanxing Ma; Haotong Ma; Xiaojun Xu; Yijun Zhao
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Paper Abstract

Multiwavelength seed laser can suppress stimulated Brillouin scattering (SBS) and improve the ultimate output power of the fiber laser amplifier. Coherent combining of multiwavelength lasers/amplifiers is a promising way to get much higher total output power than coherent combining of the single frequency lasers/amplifiers. Coherent beam combining of stimulated Brillouin scattering based multiwavelength fiber lasers is proposed and demonstrated. Multiwavelength laser is generated using stimulated Brillouin scattering effect by seeded a 10 kilometer single mode fiber laser with a single frequency laser and phase locking is achieved using stochastic parallel gradient descent (SPGD) algorithm. Experiment results shows that more than 15 wavelengths are generated for the laser. With active phase control, mean power of the main-lobe in close-loop is 1.37 times of that value in open-loop and the visibility of the long exposure interference pattern is 0.37. Scale up this architecture to higher power involves introduction of power amplifiers, increasing channel number of amplifiers and power of each individual amplifier.

Paper Details

Date Published: 16 November 2010
PDF: 6 pages
Proc. SPIE 7843, High-Power Lasers and Applications V, 784308 (16 November 2010); doi: 10.1117/12.870194
Show Author Affiliations
Xiaolin Wang, National Univ. of Defense Technology (China)
Pu Zhou, National Univ. of Defense Technology (China)
Hongwei Chen, National Univ. of Defense Technology (China)
Yanxing Ma, National Univ. of Defense Technology (China)
Haotong Ma, National Univ. of Defense Technology (China)
Xiaojun Xu, National Univ. of Defense Technology (China)
Yijun Zhao, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 7843:
High-Power Lasers and Applications V
Upendra N. Singh; Dianyuan Fan; Jianquan Yao; Robert F. Walter, Editor(s)

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