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Proceedings Paper

Progress on the suppression of FM-to-AM modulations in SG-III laser facility
Author(s): D. P. Xu; R. Zhang; X. C. Tian; D. D. Zhou; N. Zhu; J. J. Wang; M. Z. Li; D. X. Hu; X. M. Zhang
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Paper Abstract

FM-to-AM modulations are harmful to output characteristics of large-scale laser facility. In SG-III laser facility, some key techniques have been employed to suppress FM-to-AM modulations. Firstly, phase modulator was arranged at the end of fiber laser injection system to avoid GVD and PMD in the SM fiber system. Secondly, a fiber-based polarization rotated filter was proposed to suppress FM-to-AM modulations independently on each beam. Finally, less wave plates were employed and liquid crystal modulators were coated for decreasing weak etalon effect in preamplifier system. The results indicated that it can reduce the modulation depth less than 10% at a modulation frequency of 2.488GHz in SG-III laser facility.

Paper Details

Date Published: 3 February 2015
PDF: 6 pages
Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 925505 (3 February 2015); doi: 10.1117/12.2065284
Show Author Affiliations
D. P. Xu, China Academy of Engineering Physics (China)
R. Zhang, China Academy of Engineering Physics (China)
X. C. Tian, China Academy of Engineering Physics (China)
D. D. Zhou, China Academy of Engineering Physics (China)
N. Zhu, China Academy of Engineering Physics (China)
J. J. Wang, China Academy of Engineering Physics (China)
M. Z. Li, China Academy of Engineering Physics (China)
D. X. Hu, China Academy of Engineering Physics (China)
X. M. Zhang, China Academy of Engineering Physics (China)


Published in SPIE Proceedings Vol. 9255:
XX International Symposium on High-Power Laser Systems and Applications 2014
Chun Tang; Shu Chen; Xiaolin Tang, Editor(s)

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