Control of laser radiation parameters

Selection of longitudinal laser modes by a nontilted intracavity Fabry — Perot etalon

S. A. Babin, S. V. Khorev

Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk

Abstract: The use of a Fabry — Perot etalon in selection of longitudinal cavity modes was investigated. It was found that a Fabry — Perot etalon may be used for such selection in cavities with a convex mirror without tilting the etalon relative to the cavity axis. This avoids a number of limitations associated with tilting of the etalon. The mechanism of discrimination between the modes and of residual losses introduced by the etalon was analysed theoretically. Mode selection by a nontilted Fabry — Perot was achieved for an argon laser, the cavity parameters were optimised, and a high efficiency of conversion to a single-frequency regime (more than 70% in terms of the multimode lasing power, which was a factor ~ 1.5 higher than for a tilted etalon) was attained.

PACS: 42.55.Lt, 42.60.Da

Received: 17.12.1998

 English version: Quantum Electronics, 1999, 29:4, 324–328

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