SPECIAL POLARIZATION PHENOMENON OF MULTI-TRASVERSE MODE INTERNAL-MIRROR He-Ne LASER
多横模内腔He—Ne激光器的特殊偏振现象

We have observed some special polarization phenomenon of multi-transverse mode He-Ne laser. Elimination problem of mode degeneration was analysed based on Lamb theory of laser. Frequency difference between degenerate mode after eliminating degeneration was measured, and the observed phenomena were analysed theoretically.