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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 1 — Jan. 1, 2007
  • pp: 117–123

Output power enhancement of a palmtop terahertz-wave parametric generator

Shin'ichiro Hayashi, Hiroaki Minamide, Tomofumi Ikari, Yuichi Ogawa, Jun-ichi Shikata, Hiromasa Ito, Chiko Otani, and Kodo Kawase  »View Author Affiliations


Applied Optics, Vol. 46, Issue 1, pp. 117-123 (2007)
http://dx.doi.org/10.1364/AO.46.000117


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Abstract

Broadband terahertz (THz) waves were generated by optical parametric processes based on laser light scattering from the polariton mode of a nonlinear crystal. By using the parametric oscillation of a MgO-doped LiNbO 3 crystal pumped by a nanosecond Q-switched Nd:YAG laser, we have realized a broadband, high-energy and compact THz-wave source. We report the development of a THz-wave parametric generator (TPG) using a small pump source with a short pulse width and a top-hat beam profile. These characteristics of the pump beam permit high-intensity pumping especially close to the output surface of the THz wave without thermal damage to the crystal surface. We also calculated the outcoupled THz wave for beams with two different intensity profiles: a top-hat beam (in this experiment) and a Gaussian beam (previously reported). The result shows the mechanism of the output energy and∕or power enhancement.

© 2007 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(190.0190) Nonlinear optics : Nonlinear optics
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

ToC Category:
Nonlinear Optics

History
Original Manuscript: April 27, 2006
Revised Manuscript: August 24, 2006
Manuscript Accepted: September 8, 2006

Citation
Shin'ichiro Hayashi, Hiroaki Minamide, Tomofumi Ikari, Yuichi Ogawa, Jun-ichi Shikata, Hiromasa Ito, Chiko Otani, and Kodo Kawase, "Output power enhancement of a palmtop terahertz-wave parametric generator," Appl. Opt. 46, 117-123 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-1-117


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References

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