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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 23 — Aug. 10, 2007
  • pp: 5732–5737

Passive Q -switching of diode pumped Nd:KGd(WO4)2 lasers by V3+:Y3Al5O12 crystal with anisotropy of nonlinear absorption

Vasili G. Savitski, Igor A. Denisov, Alexander M. Malyarevich, Konstantin V. Yumashev, and Alexander V. Sandulenko  »View Author Affiliations


Applied Optics, Vol. 46, Issue 23, pp. 5732-5737 (2007)
http://dx.doi.org/10.1364/AO.46.005732


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Abstract

Use of a V 3+ :Y 3 Al 5 O 12 crystal as a saturable absorber Q-switch for 1.07 and 1.35 μ m Nd:KGd ( WO 4 ) 2 diode pumped lasers shows a considerable dependence of output characteristics on the orientation of the intracavity field polarization vector regarding V 3+ :Y 3 Al 5 O 12 crystallographic axes. Anisotropy of nonlinear absorption of V 3+ ions in a Y 3 Al 5 O 12 single crystal at wavelengths of 1.08 and 1.35 μ m has been experimentally studied. The experimental data are analyzed within the framework of a phenomenological model when the V 3+ ions are described as three sets of linear dipoles oriented along the crystallographic axes. Ground-state and excited-state absorption cross sections at 1.08 and 1.35 μ m are evaluated to be σ g s a = 3.4 × 10 18 cm 2 , σ e s a = 3.0 × 10 19 cm 2 and σ g s a = 5.4 × 10 18 cm 2 , σ e s a = 4.8 × 10 19 cm 2 , respectively. Saturation fluence and intensity at 1.08 and 1.35 μ m are estimated as 55 mJ / cm 2 and 1.1 MW / cm 2 , respectively.

© 2007 Optical Society of America

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3540) Lasers and laser optics : Lasers, Q-switched
(160.6990) Materials : Transition-metal-doped materials
(300.6420) Spectroscopy : Spectroscopy, nonlinear

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: April 25, 2007
Manuscript Accepted: May 22, 2007
Published: August 8, 2007

Citation
Vasili G. Savitski, Igor A. Denisov, Alexander M. Malyarevich, Konstantin V. Yumashev, and Alexander V. Sandulenko, "Passive Q-switching of diode pumped Nd:KGd(WO4)2 lasers by V3+:Y3Al5O12 crystal with anisotropy of nonlinear absorption," Appl. Opt. 46, 5732-5737 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-23-5732

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