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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 4 — Apr. 1, 2012
  • pp: 786–792

Cryogenic Faraday isolator with a disk-shaped magneto-optical element

Dmitry S. Zheleznov, Aleksey V. Starobor, Oleg V. Palashov, and Efim A. Khazanov  »View Author Affiliations


JOSA B, Vol. 29, Issue 4, pp. 786-792 (2012)
http://dx.doi.org/10.1364/JOSAB.29.000786


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Abstract

A cryogenic Faraday isolator with disc-shaped magneto-optical element is described. Depolarization of laser radiation caused by transverse inhomogeneity of Verdet constant has been measured for the first time. The decrease of the thermally induced effects caused by heat removal from the face-end of the magneto-optical element of terbium gallium garnet with sapphire and aluminum-yttrium garnet discs is investigated. Characteristics of the cryogenic Faraday isolator at high laser power above 1 kW have been investigated experimentally and the possibility of its use at power as high as 6 kW is demonstrated. The reduction of thermo-optical constants Q and P by a factor of 5.7 and 6.8, respectively, with cooling from 300 K to 80 K has been measured for TGG crystal.

© 2012 Optical Society of America

OCIS Codes
(140.6810) Lasers and laser optics : Thermal effects
(160.3820) Materials : Magneto-optical materials
(230.2240) Optical devices : Faraday effect
(230.3240) Optical devices : Isolators
(230.3810) Optical devices : Magneto-optic systems

ToC Category:
Optical Devices

History
Original Manuscript: September 30, 2011
Revised Manuscript: December 14, 2011
Manuscript Accepted: December 14, 2011
Published: March 26, 2012

Citation
Dmitry S. Zheleznov, Aleksey V. Starobor, Oleg V. Palashov, and Efim A. Khazanov, "Cryogenic Faraday isolator with a disk-shaped magneto-optical element," J. Opt. Soc. Am. B 29, 786-792 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-4-786

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