Active media. Lasers

Single-frequency oscillation of a wide-aperture krypton laser

S. A. Babin, S. V. Khorev

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

Abstract: The parameters of a high-current krypton discharge in tubes of an increased diameter (5 – 7 mm) are studied and optimised. Increased lasing power on the lines of singly and doubly charged krypton ions is achieved: 14 W (647 – 676 nm) and 6 W (407 – 415 nm). One transverse and one longitudinal mode are selected with efficiencies of 85 and 70 % using a convex – concave resonator and a Fabry — Perot etalon, respectively. The shape of the Lamb dip at the 676-nm line is studied in the single-frequency oscillation mode. It is shown that, in accordance with the theory, the dip broadens by a factor of 2.6 due to Coulomb ion – ion collisions at an achieved electron concentration N_e ~5 × 10¹⁴ cm^-3.

PACS: 42.55.Lt, 42.60.Da, 42.60.Jf

Received: 09.12.2002

 English version: Quantum Electronics, 2003, 33:9, 798–802

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