A Source for Ultrafast Continuum Infrared and Terahertz Radiation
Name
Tokmakoff-Source for Ultrafast.pdf
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334.21 KB
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Author(s)
Petersen, Poul B.
Tokmakoff, Andrei
Date Issued
June 2010
Journal
Optics Letters
Publisher
Optical Society of America
Citation
Petersen, Poul B., and Andrei Tokmakoff. “Source for Ultrafast Continuum Infrared and Terahertz Radiation.” Optics Letters 35.12 (2010): 1962-1964. Web.
Version
Author's final manuscript
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 <400cm⁻1 (12THz, 25mu)to >3300cm⁻1 (100TuZ, 3μm) 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.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Creative Commons Attribution-Noncommercial-Share Alike 3.0
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DOI of Published Version
https://doi.org/10.1364/OL.35.001962
