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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 18 — Sep. 1, 2008
  • pp: 14294–14303

Generation and spectral manipulation of coherent terahertz radiation with two-stage optical rectification

Ching-Wei Chen, Yu-Shian Lin, Jung Y. Huang, Chen-Shiung Chang, Ci-Ling Pan, Li Yan, and Chao-Kuei Lee  »View Author Affiliations

Optics Express, Vol. 16, Issue 18, pp. 14294-14303 (2008)

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We propose and experimentally demonstrate the generation of single-cycle terahertz radiation with two-stage optical rectification in GaSe crystals. By adjusting the time delay between the pump pulses employed to excite the two stages, the terahertz radiation from the second GaSe crystal can constructively superpose with the terahertz field injected from the first stage. The high mutual coherence between the two terahertz radiation fields is ensured with the coherent optical rectification process and can be further used to synthesize a desired spectral profile of coherent THz radiation. The technique is also potentially useful for generating high-power single-cycle terahertz pulses, usually limited by the pulse walk-off effect of the nonlinear optical crystal used.

© 2008 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(070.1675) Fourier optics and signal processing : Coherent states (in wave optics)
(190.4223) Nonlinear optics : Nonlinear wave mixing
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Nonlinear Optics

Original Manuscript: July 15, 2008
Revised Manuscript: August 22, 2008
Manuscript Accepted: August 23, 2008
Published: August 28, 2008

Ching-Wei Chen, Yu-Shian Lin, Jung Y. Huang, Chen-Shiung Chang, Ci-Ling Pan, Li Yan, and Chao-Kuei Lee, "Generation and spectral manipulation of coherent terahertz radiation with two-stage optical rectification," Opt. Express 16, 14294-14303 (2008)

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