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Proceedings Paper

External folded cavity optical feedback diode laser with megahertz relative linewidth
Author(s): Zhifu Luo; Xingwu Long; Zhongqi Tan
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Paper Abstract

We present a extended-cavity diode laser (ECDL) with megahertz linewidth by optical feedback from a folded Fabry–Perot cavity, and demonstrate the efficient laser linewidth reduction and frequency stabilization of the optical feedback technique. In our experiments, a folded Fabry–Perot cavity with a finesse of 4750 replaces the reflecting mirror in the traditional ECDL configuration, the folded Fabry–Perot cavity can serve as an optical feedback element, which forces the semiconductor laser automatically to lock its frequency optically to the cavity resonance frequency. The laser’s phase noise is significantly suppressed, and The laser’s linewidth is reduced from about 20GHz to 15MHz.

Paper Details

Date Published: 9 December 2014
PDF: 8 pages
Proc. SPIE 9294, International Symposium on Optoelectronic Technology and Application 2014: Development and Application of High Power Lasers, 92940X (9 December 2014); doi: 10.1117/12.2071069
Show Author Affiliations
Zhifu Luo, National Univ. of Defense Technology (China)
Xingwu Long, National Univ. of Defense Technology (China)
Zhongqi Tan, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9294:
International Symposium on Optoelectronic Technology and Application 2014: Development and Application of High Power Lasers
Guofan Jin; Songlin Zhuang; Jennifer Liu, Editor(s)

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