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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 17, Iss. 1 — Jan. 1, 2000
  • pp: 99–102

Suppression of self-induced depolarization of high-power laser radiation in glass-based Faraday isolators

Efim Khazanov, Nikolay Andreev, Alexey Babin, Alexander Kiselev, Oleg Palashov, and David H. Reitze  »View Author Affiliations


JOSA B, Vol. 17, Issue 1, pp. 99-102 (2000)
http://dx.doi.org/10.1364/JOSAB.17.000099


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Abstract

Light absorption in optical elements of Faraday rotators results in a nonuniform cross-sectional temperature distribution that leads to depolarization of laser radiation and, consequently, limits the isolation ratio of optical Faraday isolators. We show experimentally that the influence of the temperature dependence of the Verdet constant on the isolation ratio is negligibly small when compared with the influence of the photoelastic effect. We also present two novel methods of optical isolation that significantly reduce the depolarization caused by the photoelastic effect and increase the isolation ratio by two orders of magnitude in comparison with the conventional method. Our results confirm the possibility of magneto-optical glass-based Faraday isolators with isolation ratios of 30 dB for average laser powers of hundreds of watts.

© 2000 Optical Society of America

OCIS Codes
(140.6810) Lasers and laser optics : Thermal effects
(230.3240) Optical devices : Isolators
(230.5440) Optical devices : Polarization-selective devices

Citation
Efim Khazanov, Nikolay Andreev, Alexey Babin, Alexander Kiselev, Oleg Palashov, and David H. Reitze, "Suppression of self-induced depolarization of high-power laser radiation in glass-based Faraday isolators," J. Opt. Soc. Am. B 17, 99-102 (2000)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-17-1-99

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