It is shown that a uniaxial crystal (cut along the optical axis) placed inside a telescope may compensate for thermally induced birefringence in laser-active elements. Depolarization was reduced in an experiment by an order of magnitude.
© 2002 Optical Society of America
Efim Khazanov, Anatoly Potemkin, and Eugeny Katin, "Compensating for birefringence in active elements of solid-state lasers: novel method," J. Opt. Soc. Am. B 19, 667-671 (2002)