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Proceedings Paper

Volume Bragg Grating temperature gradient effect on laser diode array and stack spectra narrowing
Author(s): Hongyan Wang; Zining Yang; Weihong Hua; Wenguang Liu; Xiaojun Xu
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Paper Abstract

A strip Volume Bragg Grating (VBG) locked 64 emitter diode laser array’s center wavelength shift of each emitter according to VBG’s local temperature is experimentally studied, which is consistent well with thermal imaging temperature distribution, Finite element analysis (FEA) is then used to study strip and large area VBG’s temperature gradients, we find even with minute heat deposition, due to PTR glass’s low heat conductivity, tens degrees temperature gradient could easily be built, we suggest it may be partially respond for stack’s poor spectra narrowing performance compared to single laser diode and diode array. Finally, some measures are further suggested to alleviate the effect.

Paper Details

Date Published: 30 January 2013
PDF: 6 pages
Proc. SPIE 8677, XIX International Symposium on High-Power Laser Systems and Applications 2012, 86771F (30 January 2013); doi: 10.1117/12.2010488
Show Author Affiliations
Hongyan Wang, National Univ. of Defense Technology (China)
Zining Yang, National Univ. of Defense Technology (China)
Weihong Hua, National Univ. of Defense Technology (China)
Wenguang Liu, National Univ. of Defense Technology (China)
Xiaojun Xu, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 8677:
XIX International Symposium on High-Power Laser Systems and Applications 2012
Kerim R. Allakhverdiev, Editor(s)

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