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Proceedings Paper

Passive coherent beam combination of two nanosecond fiber amplifiers by using an all-optical feedback loop
Author(s): Houkang Liu; Jun Zhou; Bing He; Qihong Lou
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Paper Abstract

We demonstrate a passive coherent beam combination of two nanosecond amplifiers by using an all-optical feedback loop. An electro-optic amplitude modulator is utilized to tune the pulse width and the pulse repetition frequency of combined laser pulse. The positive correlation between the visibility of far-field coherent patterns and the pulse duty ratio is found. The range of tunable pulse repetition frequency is from 2.023 MHz to 6.069 MHz, and the range of tunable pulse width is from 10 ns to 50 ns. The maximum visibility is up to 85%. This approach presented here provides a promising way for power scaling of high power nanosecond fiber laser and maintaining beam quality simultaneously.

Paper Details

Date Published: 26 February 2013
PDF: 6 pages
Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 860119 (26 February 2013); doi: 10.1117/12.2002973
Show Author Affiliations
Houkang Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Graduate Univ. of the Chinese Academy of Sciences (China)
Jun Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Bing He, Shanghai Institute of Optics and Fine Mechanics (China)
Qihong Lou, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 8601:
Fiber Lasers X: Technology, Systems, and Applications
Sami T. Hendow, Editor(s)

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