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Applied Optics

Applied Optics


  • Vol. 38, Iss. 12 — Apr. 20, 1999
  • pp: 2554–2559

Passively Q-switched 1.57-µm intracavity optical parametric oscillator

Yuri Yashkir and Henry M. van Driel  »View Author Affiliations

Applied Optics, Vol. 38, Issue 12, pp. 2554-2559 (1999)

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We demonstrate an eye-safe KTP-based optical parametric oscillator (OPO) driven intracavity by a diode-pumped 1064-nm Nd:YAG laser, passively Q-switched by a Cr4+:YAG crystal. The characteristics of this system, which operates at 1570 nm with a repetition rate as high as 50 Hz, are studied as a function of Cr4+:YAG optical density. Under optimum conditions the OPO generates 1.5-mJ, 3.4 ± 0.1-ns pulses in a single transverse mode. For a Cr4+:YAG Q-switch element with an optical density of 0.5 the conversion efficiency of the intracavity energy is ∼45% with the ratio of OPO to Nd:YAG peak-pulse intensity exceeding unity. These and other OPO characteristics compare favorably with a simple rate equation model of the OPO dynamics.

© 1999 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3540) Lasers and laser optics : Lasers, Q-switched
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

Original Manuscript: November 2, 1998
Revised Manuscript: December 9, 1998
Published: April 20, 1999

Yuri Yashkir and Henry M. van Driel, "Passively Q-switched 1.57-µm intracavity optical parametric oscillator," Appl. Opt. 38, 2554-2559 (1999)

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  1. See, for example, Advanced Solid State Lasers, W. R. Bosenberg, M. M. Feyer, eds., Vol. 19 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 1998).
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  10. This laser is similar to a system described by U. J. Greiner, H. H. Klingenberg, D. R. Walker, C. J. Flood, H. M. van Driel, “Diode pumped Nd:YAG laser using reflective pump optics,” Appl. Phys. B 58, 393–395 (1994).
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