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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 33, Iss. 1 — Jan. 1, 2008
  • pp: 52–54

High-efficiency mid-infrared ZnGeP 2 optical parametric oscillator directly pumped by a lamp-pumped, Q-switched CrTmHo : YAG laser

A. F. Nieuwenhuis, C. J. Lee, P. J. M. van der Slot, I. D. Lindsay, P. Groß, and K.-J. Boller  »View Author Affiliations


Optics Letters, Vol. 33, Issue 1, pp. 52-54 (2008)
http://dx.doi.org/10.1364/OL.33.000052


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Abstract

We report a singly resonant optical parametric oscillator (SRO) based on a ZnGeP 2 crystal directly pumped by a lamp-pumped Q-switched CrTmHo : YAG laser. The IR was tunable from 4.7 to 7.8 μ m via crystal angle tuning. A maximum optical to optical efficiency of 56% was obtained from the pump ( 2.09 μ m ) to total IR at a pump energy of 6.5 mJ . The corresponding idler energy was 1.45 mJ . The SRO was measured to have a slope efficiency of 64% and a threshold of 1 mJ . The spatial beam quality of the idler, characterized by the M 2 parameter, was 1.38 when the SRO was pumped at 2.5 times threshold. These results show that ZnGeP 2 optical parametric oscillators directly pumped by a CrTmHo : YAG laser can be operated efficiently, while maintaining good IR beam quality.

© 2008 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
(140.3580) Lasers and laser optics : Lasers, solid-state
(190.0190) Nonlinear optics : Nonlinear optics
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

ToC Category:
Nonlinear Optics

History
Original Manuscript: September 27, 2007
Manuscript Accepted: November 15, 2007
Published: December 20, 2007

Citation
A. F. Nieuwenhuis, C. J. Lee, P. J. M. van der Slot, I. D. Lindsay, P. Groß, and K.-J. Boller, "High-efficiency mid-infrared ZnGeP2 optical parametric oscillator directly pumped by a lamp-pumped, Q-switched CrTmHo:YAG laser," Opt. Lett. 33, 52-54 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-1-52

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