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This article is cited in 2 scientific papers (total in 2 papers)
Lasers
Coherent beam combining of pulsed fibre amplifiers with active phase control
X. L. Wang, P. Zhou, Y. X. Ma, H. Ma, X. J. Xu, Z. J. Liu, Y. J. Zhao College of Optoelectronic Science and Engineering, National University of Defense Technology, China
Abstract:
Coherent beam combining of pulsed fibre lasers is a promising method for power scaling while simultaneously maintaining good beam quality. We propose and demonstrate a scalable architecture for coherent beam combining of all-fibre pulsed amplifiers with active phase control using the stochastic parallel gradient descent (SPGD) algorithm. A low-pass filter is introduced to eliminate the fluctuation of the metric function caused by pulsed lasers and to extract the exact phase noise signal. Active control is thereby based on the SPGD algorithm, resulting in stable coherent beam combining at the receiving plane even in a turbulent environment. Experimental results show that the fringe visibility of the long exposure pattern increases from 0 to 0.4, and the power encircled in the main-lobe increases by 1.6 times when the system evolves from the open-loop phase-locking scheme to the closed-loop scheme. This architecture can be easily scaled up to a higher power by increasing the number of amplifying channels and the power of a single amplifier.
Received: 25.02.2011
Citation:
X. L. Wang, P. Zhou, Y. X. Ma, H. Ma, X. J. Xu, Z. J. Liu, Y. J. Zhao, “Coherent beam combining of pulsed fibre amplifiers with active phase control”, Kvantovaya Elektronika, 41:12 (2011), 1087–1092 [Quantum Electron., 41:12 (2011), 1087–1092]
Linking options:
https://www.mathnet.ru/eng/qe14617 https://www.mathnet.ru/eng/qe/v41/i12/p1087
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Abstract page: | 219 | Full-text PDF : | 211 | References: | 44 | First page: | 1 |
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