Coherent beam combining of stimulated Brillion scattering based multiwavelength lasers

Xiaolin Wang; Pu Zhou; Hongwei Chen; Yanxing Ma; Haotong Ma; Xiaojun Xu; Yijun Zhao

doi:10.1117/12.870194

16 November 2010 Coherent beam combining of stimulated Brillion scattering based multiwavelength lasers

Xiaolin Wang, Pu Zhou, Hongwei Chen, Yanxing Ma, Haotong Ma, Xiaojun Xu, Yijun Zhao

Proceedings Volume 7843, High-Power Lasers and Applications V; 784308 (2010) https://doi.org/10.1117/12.870194
Event: Photonics Asia 2010, 2010, Beijing, China

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.

Citation Download Citation

Xiaolin Wang, Pu Zhou, Hongwei Chen, Yanxing Ma, Haotong Ma, Xiaojun Xu, and Yijun Zhao "Coherent beam combining of stimulated Brillion scattering based multiwavelength lasers", Proc. SPIE 7843, High-Power Lasers and Applications V, 784308 (16 November 2010); https://doi.org/10.1117/12.870194

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