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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 15 — May. 20, 2009
  • pp: 2899–2902

Tunability enhancement of a terahertz-wave parametric generator pumped by a microchip Nd:YAG laser

Shin’ichiro Hayashi, Takayuki Shibuya, Hiroshi Sakai, Takunori Taira, Chiko Otani, Yuichi Ogawa, and Kodo Kawase  »View Author Affiliations

Applied Optics, Vol. 48, Issue 15, pp. 2899-2902 (2009)

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We have enhanced the tunability of a terahertz-wave parametric generator using MgO : LiNbO 3 pumped by a subnanosecond, passively Q-switched, microchip Nd:YAG laser. This pump source allows high-intensity pumping without damage to the nonlinear crystal and generates a narrow linewidth and tunable terahertz wave with injection seeding by an external cavity diode laser for the idler wave. The high-intensity pumping causes a gain curve broadening of the terahertz-wave parametric generation, especially in the high-frequency region. We obtained an output terahertz wave with a tuning range of 0.9 3 THz ( 100 330 μm ), a peak power of 100 mW , and a linewidth of less than 10 GHz . This room temperature operated, palm-sized source promises to be a widely tunable terahertz-wave source that is suited to a variety of applications.

© 2009 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 13, 2009
Manuscript Accepted: April 13, 2009
Published: May 15, 2009

Shin'ichiro Hayashi, Takayuki Shibuya, Hiroshi Sakai, Takunori Taira, Chiko Otani, Yuichi Ogawa, and Kodo Kawase, "Tunability enhancement of a terahertz-wave parametric generator pumped by a microchip Nd:YAG laser," Appl. Opt. 48, 2899-2902 (2009)

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