This article is cited in 1 paper

Control of laser radiation parameters

Generation of multiband tunable radiation in TEA CO₂ lasers

G. N. Makarov^a, N. D. Ogurok^a, A. N. Petin<sup>b

a</sup> Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow
^b Troitsk Institute for Innovation and Fusion Research

Abstract: A method for generating multiband tunable radiation in TEA CO₂ lasers is described. Simultaneous lasing in all four branches of the 10⁰0← 00⁰1 and 02⁰0← 00⁰1 vibrational — rotational bands of CO₂ was achieved. Frequency tuning in each of the bands in multiband lasing was ensured by introduction of selective absorbers (SF₆, CF₂HCl, CF₃I) and/or parallel CaF₂ or BaF₂ plates into a two-mirror laser cavity. The frequency in a selected band was tuned with the aid of an additional cavity formed by a diffraction grating, a beam-splitting plate inside the main cavity, and one of the laser mirrors. This additional cavity made it possible to control also the energy of a pulse at the resonance frequency and to reduce (by no more than 50 ns) the delay time of this pulse (relative to a discharge-current pulse), compared with the delay times of pulses at other frequencies. The results obtained were used to propose schemes for two-frequency isotopically selective dissociation of molecules inside a nonselective cavity of a TEA CO₂ laser (without a diffraction grating).

PACS: 42.55.Lt, 42.60.Lh

Received: 23.09.1996

 English version: Quantum Electronics, 1997, 27:7, 626–630

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