This article is cited in 7 papers

Control of laser radiation parameters

Self-heterodyne detection of backscattered radiation in single-mode CO₂ lasers

V. M. Gordienko^ab, A. N. Konovalov^c, V. A. Ul'yanov<sup>c

a</sup> Lomonosov Moscow State University, Faculty of Physics
^b International Laser Center of Moscow State University
^c Institute on Laser and Information Technologies, Russian Academy of Scienses

Abstract: Self-heterodyning in dc-discharge-pumped single-mode CO₂ lasers is analysed theoretically and studied experimentally under strong and weak feedback conditions. Relations for the autodyne gain and modulation depth due to the effect of backscattered radiation with a Doppler-shifted frequency are obtained. Nonlinear distortions of the autodyne signal caused by a strong laser — target feedback are studied. It is shown that the autodyne detection of backscattered radiation in CO₂ lasers can be considered linear even in the case of strong laser beam distortions (nonlinear distortions below 5%).

PACS: 42.55.Lt, 42.60.Mi, 42.65.Sf

Received: 08.12.2010
Revised: 10.02.2011

 English version: Quantum Electronics, 2011, 41:5, 433–440

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