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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 22 — Oct. 25, 2010
  • pp: 22625–22630

Broadband terahertz generation through intracavity nonlinear optical rectification

Shixiang Xu, Jin Liu, Guoliang Zheng, and Jingzhen Li  »View Author Affiliations

Optics Express, Vol. 18, Issue 22, pp. 22625-22630 (2010)

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This paper presents a novel design for getting high signal-noise ratio broadband terahertz signal through intracavity optical rectification together with terahertz EO sampling. A nonlinear crystal as terahertz emitter is positioned inside a femtosecond laser oscillator under Brewster angle pumping configuration in order to scale up the pumping pulse power but to keep high pulse repetition rate. Our experiments show that the compact and cost-effective design improves the signal-noise ratio by about 29 times compared with the counterpart based on extracavity nonlinear optical rectification. This work opens a new way to improve the signal-noise ratio of the free-space terahertz time-domain spectroscopy through nonlinear optical rectification pumped by a femtosecond laser oscillator.

© 2010 OSA

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.7080) Ultrafast optics : Ultrafast devices
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Ultrafast Optics

Original Manuscript: August 18, 2010
Revised Manuscript: October 3, 2010
Manuscript Accepted: October 3, 2010
Published: October 11, 2010

Shixiang Xu, Jin Liu, Guoliang Zheng, and Jingzhen Li, "Broadband terahertz generation through intracavity nonlinear optical rectification," Opt. Express 18, 22625-22630 (2010)

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