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Proceedings Paper

Compact double optical feedback external-cavity diode laser system and its frequency stabilization
Author(s): Kohei Doi; Yuta Minabe; Takashi Sato; Takeo Maruyama; Masashi Ohkawa; Tsuneya Tsubokawa
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Paper Abstract

External cavity diode laser (ECDL) systems are presently experiencing a surge in popularity as laser light-sources, in advanced optical communications- and measurement-systems. Because such systems require that their external reflectors be precisely controlled, to eliminate low frequency fluctuations (LFF) in optical output, we conducted experiments with a two-cavity version, which easily eliminated LFFs, as expected. The technique has the added advantage of a narrower oscillation-linewidth than would be achievable, using a single optical feedback. However, the ECDL's oscillation frequency is susceptible to the influences of the drive-current, as well as changes, both in the refractive index, and the overall length of the external reflector that results from fluctuations in atmospheric temperature. We made every effort to maintain the length of the ECDL cavity, while evaluating oscillation-frequency stability. We used a Super-Invar board as the platform for our compact ECDL system to minimize the influence of thermal expansion, because of its low expansion coefficient. We then compared the effect of atmospheric temperature variations between two experimental conditions, with the Super-invar board and without it, and finally took note of the improvement in performance, using the board.

Paper Details

Date Published: 22 March 2007
PDF: 7 pages
Proc. SPIE 6468, Physics and Simulation of Optoelectronic Devices XV, 64680E (22 March 2007); doi: 10.1117/12.698961
Show Author Affiliations
Kohei Doi, Niigata Univ. (Japan)
Yuta Minabe, Niigata Univ. (Japan)
Takashi Sato, Niigata Univ. (Japan)
Takeo Maruyama, Niigata Univ. (Japan)
Masashi Ohkawa, Niigata Univ. (Japan)
Tsuneya Tsubokawa, National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 6468:
Physics and Simulation of Optoelectronic Devices XV
Marek Osinski; Fritz Henneberger; Yasuhiko Arakawa, Editor(s)

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