Normal modes of a ferromagnetic laser with one Brewster face

Normal modes are determined for a solid-state laser constructed with one Brewster angle face that incorporates a gyrotropic host crystal. It is shown that, depending on the amount of Faraday rotation down the length of the crystal, the modes may be either linearly or elliptically polarized. Values for reflection loss and resonant frequency are determined. These calculations may be used to determine optimum conditions for modulation of amplitude, polarization aspect, and frequency of the output of a YIG laser.