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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 12 — Jun. 15, 2010
  • pp: 1962–1964

Source for ultrafast continuum infrared and terahertz radiation

Poul B. Petersen and Andrei Tokmakoff  »View Author Affiliations


Optics Letters, Vol. 35, Issue 12, pp. 1962-1964 (2010)
http://dx.doi.org/10.1364/OL.35.001962


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Abstract

A compact and stable method for generating high-intensity linearly polarized continuum mid-IR and terahertz light using ultrafast femtosecond (fs) laser pulses is demonstrated. Continuous light generation from < 400 cm 1 ( 12 THz , 25 μm ) to > 3300 cm 1 ( 100 THz , 3 μm ) in a sub-100 fs laser pulse is facilitated by nonlinear mixing of the fundamental, second harmonic, and third harmonic of an ultrafast amplified laser source through filamentation in air. Including the third harmonic in the mixing scheme leads to a tenfold increase in the generated IR power. The compact optical configuration utilizing a delay plate in a collinear geometry serves to simplify alignment and increase stability, making it a practical source for transient IR spectroscopy.

© 2010 Optical Society of America

OCIS Codes
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(260.3060) Physical optics : Infrared
(320.7160) Ultrafast optics : Ultrafast technology
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Ultrafast Optics

History
Original Manuscript: April 14, 2010
Revised Manuscript: May 7, 2010
Manuscript Accepted: May 12, 2010
Published: June 3, 2010

Citation
Poul B. Petersen and Andrei Tokmakoff, "Source for ultrafast continuum infrared and terahertz radiation," Opt. Lett. 35, 1962-1964 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-12-1962


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