Abstract
The method for estimating the power of a He–Ne laser with an arbitrary shape of a tube cross section is proposed. A new energy characteristic of the mode is introduced as an effective mode volume, taking into account the population inversion distribution of the active medium and the field distribution in the resonator. The population inversion distribution for the He–Ne laser satisfies the homogeneous Helmholtz equation, a method of approximated solution of which has been proposed previously. The method is used to estimate the power of lasers with rectangular and elliptical sections of the active element. The exact solution of the Helmholtz equation is used for both sections, respectively, in cylindrical and elliptical coordinates. The numerical calculations were made that examined the shape of the effective mode volume and calculated the radiation power for both cross sections. The calculation results for these cross sections give good agreement with previous laser gain calculations and experiments.
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Kozhevnikov, V., Privalov, V., Shemanin, V. (2021). Radiation Power of He–Ne Laser with Different Geometry of the Tube Cross Section. In: Velichko, E., Vinnichenko, M., Kapralova, V., Koucheryavy, Y. (eds) International Youth Conference on Electronics, Telecommunications and Information Technologies. Springer Proceedings in Physics, vol 255. Springer, Cham. https://doi.org/10.1007/978-3-030-58868-7_39
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