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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 1 — Jan. 1, 2001
  • pp: 25–27

Continuous-wave 4.3-μm intracavity difference frequency generation in an optical parametric oscillator

Da-Wun Chen and Kevin Masters  »View Author Affiliations


Optics Letters, Vol. 26, Issue 1, pp. 25-27 (2001)
http://dx.doi.org/10.1364/OL.26.000025


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Abstract

We have achieved 150 mW of cw output at 4.3μm, using difference frequency mixing in a singly resonant optical parametric oscillator (OPO). We pumped the OPO cavity, which contains periodically poled LiNbO<sub>3</sub> (PPLN), with a 14-W 1.06-μm Nd:YAG laser to generate a signal at 1.7 μm and an idler at 2.8 μm. Mixing of the two waves at the same crystal temperature and grating spacing yielded emission in the mid IR. This technique avoids the mid-IR absorption–high-threshold problem, which has limited the cw performance of PPLN OPO's at wavelengths beyond 4 μm. Provided that tunability is not required, this method is a simple alternative to multiple-crystal configurations.

© 2001 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3580) Lasers and laser optics : Lasers, solid-state
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

Citation
Da-Wun Chen and Kevin Masters, "Continuous-wave 4.3-μm intracavity difference frequency generation in an optical parametric oscillator," Opt. Lett. 26, 25-27 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-1-25

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