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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 12 — Jun. 4, 2012
  • pp: 13357–13367

Drastic reduction of thermally induced depolarization in CaF2 crystals with [111] orientation

Ilya Snetkov, Anton Vyatkin, Oleg Palashov, and Efim Khazanov  »View Author Affiliations

Optics Express, Vol. 20, Issue 12, pp. 13357-13367 (2012)

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The key importance of the sign of the stress-optic anisotropy ratio for reducing thermally induced depolarization in cubic crystals with 432, 4 ¯ 3m and m3m symmetry is addressed. A simple method for measuring the stress-optic anisotropy ratio (including its sign) was proposed and verified in CaF2 and TGG crystals by experiment. The ratio at room temperature for the wavelength 1076 nm was measured to be −0.47 and + 2.25, respectively. In crystals with a negative value of this parameter thermally induced depolarization may be reduced significantly by choosing crystal orientation. In a CaF2 crystal with the [111] orientation a 20-fold reduction of thermally induced depolarization as compared to the [001] orientation was obtained in experiment, which is very promising for using CaF2 as an active element in high-average-power lasers.

© 2012 OSA

OCIS Codes
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(140.6810) Lasers and laser optics : Thermal effects
(160.3380) Materials : Laser materials
(260.1440) Physical optics : Birefringence

ToC Category:

Original Manuscript: April 17, 2012
Revised Manuscript: May 16, 2012
Manuscript Accepted: May 16, 2012
Published: May 30, 2012

Ilya Snetkov, Anton Vyatkin, Oleg Palashov, and Efim Khazanov, "Drastic reduction of thermally induced depolarization in CaF2 crystals with [111] orientation," Opt. Express 20, 13357-13367 (2012)

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