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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 20 — Oct. 1, 2007
  • pp: 12699–12707

Enhanced output power for phase-matched second-harmonic generation at 10.6 μm in a ZnGeP2 crystal

Yi Jiang and Yujie J. Ding  »View Author Affiliations


Optics Express, Vol. 15, Issue 20, pp. 12699-12707 (2007)
http://dx.doi.org/10.1364/OE.15.012699


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Abstract

Second-harmonic generation was phase-matched at the fundamental wavelength of 10.6 μm in an annealed ZnGeP2 crystal at room temperature. Our results demonstrated that the phase-matching angle was decreased with increasing the pump power. Such a unique dependence resulted in a significant enhancement on the second-harmonic output power. The highest average output power at 5.3 μm was 55 mW for an average pump power of 5.0 W, which corresponded to a conversion efficiency of 1.1%. Due to the laser-induced heating effect, the second-harmonic output power was increased by 65%. Such an efficient conversion was made possible also by using a short-pulse repetition-frequency-excited waveguide and single-longitudinal-mode CO2 laser as a fundamental beam.

© 2007 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Nonlinear Optics

History
Original Manuscript: August 14, 2007
Revised Manuscript: September 6, 2007
Manuscript Accepted: September 16, 2007
Published: September 19, 2007

Citation
Yi Jiang and Yujie J. Ding, "Enhanced output power for phase-matched second-harmonic generation at 10.6 μm in a ZnGeP2 crystal," Opt. Express 15, 12699-12707 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-20-12699


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