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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN 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)
http://dx.doi.org/10.1364/AO.38.002554


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Abstract

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

Citation
Yuri Yashkir and Henry M. van Driel, "Passively Q-Switched 1.57-µm Intracavity Optical Parametric Oscillator," Appl. Opt. 38, 2554-2559 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-12-2554


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References

  1. See, for example, Advanced Solid State Lasers, W. R. Bosenberg and 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, and H. M. van Driel, “Diode pumped Nd:YAG laser using reflective pump optics,” Appl. Phys. B 58, 393–395 (1994).
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