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Method for high resolution and wideband spectroscopy in the terahertz and far-infrared region |
JOSA B, Vol. 29, Issue 10, pp. 2861-2868 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002861
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Abstract
Asynchronous electro-optic sampling (A-EOS) using two mode-locked lasers with slightly different pulse repetition rates has significantly advanced high-speed time-domain terahertz (THz) spectroscopy on several practical fronts. However, A-EOS also holds strong potential as a precision frequency measurement technique. By carefully considering A-EOS in the frequency domain as a pair of femtosecond frequency combs with a detuned comb spacing, we show there exists a unique one-to-one mapping between a THz frequency comb and the resulting radio frequency comb of the A-EOS signal. With reasonable frequency comb spacing (0.1 to 1 GHz) and detuning frequencies (1 to 50 kHz) of the combs’ repetition rates, interrogation bandwidths of
© 2012 Optical Society of America
OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.4050) Lasers and laser optics : Mode-locked lasers
(320.7090) Ultrafast optics : Ultrafast lasers
(300.6495) Spectroscopy : Spectroscopy, teraherz
ToC Category:
Spectroscopy
History
Original Manuscript: May 29, 2012
Manuscript Accepted: July 26, 2012
Published: September 21, 2012
Citation
Robert A. Stead, Arthur K. Mills, and David J. Jones, "Method for high resolution and wideband spectroscopy in the terahertz and far-infrared region," J. Opt. Soc. Am. B 29, 2861-2868 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-10-2861
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