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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. 8 — Aug. 1, 2012
  • pp: 2138–2146

Influence of energy transfer upconversion on thermal lens of Nd:YVO4 bounce laser amplifier

Ştefan A. Amarande  »View Author Affiliations


JOSA B, Vol. 29, Issue 8, pp. 2138-2146 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002138


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Abstract

Detrimental thermal effects affecting optical performances of a Nd:YVO4 bounce laser amplifier are investigated numerically under small-signal gain conditions. Thermally induced lens is stronger due to the increase of the fractional thermal loading with the pump irradiance, which is caused by the Auger energy-transfer upconversion (ETU). At a pump power of 100 W, the focal length of the thermal lens (TL) is comparable to the length of the laser crystal and is shorter than without Auger ETU by a factor of 3 and 2.5 in the bounce plane and, respectively, in the plane orthogonal to bounce. This deleterious influence of Auger ETU on the TL of the bounce laser amplifier can be alleviated by the increase of the pump spot area and by the mismatch between the diode pump spectrum and the absorption band of the crystal.

© 2012 Optical Society of America

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.6810) Lasers and laser optics : Thermal effects
(350.6830) Other areas of optics : Thermal lensing
(140.3613) Lasers and laser optics : Lasers, upconversion

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: March 23, 2012
Revised Manuscript: June 16, 2012
Manuscript Accepted: June 20, 2012
Published: July 27, 2012

Citation
Ştefan A. Amarande, "Influence of energy transfer upconversion on thermal lens of Nd:YVO4 bounce laser amplifier," J. Opt. Soc. Am. B 29, 2138-2146 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-8-2138


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