Studies to determine whether it is possible to obtain a stable single-frequency mode of generation in large He–Ne lasers were undertaken. Selection of the frequencies in the particular lasers was performed by means of a Fabry–Perot interferometer situated at a low angle to the axis of the cavity resonator. It is shown that a laser that has been converted to function in a single-frequency mode of emission assures a coherence length of at least 10 m even when subjected to technical vibratory and acoustic effects.
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Translated from Izmeritel’naya Tekhnika, No. 3, pp. 24–26, March, 2009.
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Borisovskii, S.P., Kernosov, M.Y., Stepanov, V.A. et al. Investigation of the parameters of laser radiation emitted by a single-frequency high-power gas laser. Meas Tech 52, 254–259 (2009). https://doi.org/10.1007/s11018-009-9256-9
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DOI: https://doi.org/10.1007/s11018-009-9256-9