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V A Vas'kov, S A Gonchukov, V M Ermachenko, V N Petrovskii and E D Protsenko
© 1973 American Institute of Physics
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Citation V A Vas'kov et al 1973 Sov. J. Quantum Electron. 3 165
DOI 10.1070/QE1973v003n02ABEH005075
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An experimental and theoretical investigation was made of the frequency characteristics of a helium–neon laser emitting at λ = 3.39 μ. The laser contained an absorbing cell filled with methane and it produced two orthogonally polarized longitudinal modes.