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The effects of nonuniform gain in ruby lasers

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Abstract

A Monte Carlo method is used to examine the pumping density distribution in the active elements of cw ruby lasers. It is shown that when elliptical reflectors are used in conditions typical for such lasers the transverse dimension of the pumped region in the ruby is about 0.6 mm. A direct measurement of the pumping distribution confirms this conclusion. The effect of a nonuniformity in the gain of a cw ruby laser on the mode parameters and lasing threshold is studied experimentally. The measurements are in satisfactory agreement with the theory of Gaussian beams in a medium with a parabolic distribution of the gain coefficient and the theory may be used to evaluate the threshold and other characteristics of a laser.

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Authors and Affiliations

  1. Tomsk Institute of Automation and Electronics, USSR

    E. S. Kovalenko, G. A. Kolchina & V. A. Laptev

Authors
  1. E. S. Kovalenko
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  2. G. A. Kolchina
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  3. V. A. Laptev
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Additional information

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 10, pp. 92–97, October, 1976.

In conclusion the authors thank A. A. Kashkan for important help in the calculations for the first section of this article.

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Kovalenko, E.S., Kolchina, G.A. & Laptev, V.A. The effects of nonuniform gain in ruby lasers. Soviet Physics Journal 19, 1319–1324 (1976). https://doi.org/10.1007/BF00891202

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  • DOI: https://doi.org/10.1007/BF00891202

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