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Proceedings Paper

Compensation of thermally induced birefringence in an active medium made of polycrystalline ceramics
Author(s): Mikhail A. Kagan; Efim A. Khazanov
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Paper Abstract

The essential difference of ceramics from a single crystal is that crystal axes in each grain comprising ceramics are arbitrarily oriented. We apply quaternion formalism (instead of traditional Jones matrix formalism) to describe depolarization of laser beam. This allows us to derive analytical expressions for depolarization ratio for uncompensated case and for all known compensation techniques as well. The analytic results, we have got, are in good agreement with numerical ones. It has been shown, that ceramic is almost equivalent to [111] crystal if the ratio of the rod length to grain length is about 300 or more. In particular, uncompensated depolarization is inversely proportional to this ratio. The latter is an important consequence of the random nature of thermally induced birefringence in ceramics.

Paper Details

Date Published: 17 June 2003
PDF: 12 pages
Proc. SPIE 4968, Solid State Lasers XII, (17 June 2003);
Show Author Affiliations
Mikhail A. Kagan, Pennsylvania State Univ. (Russia)
Efim A. Khazanov, Institute of Applied Physics (Russia)

Published in SPIE Proceedings Vol. 4968:
Solid State Lasers XII
Richard Scheps, Editor(s)

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