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  4. Interferometry-aided delay lines for high-precision terahertz time-domain spectroscopy
 
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2016
  • Konferenzbeitrag

Titel

Interferometry-aided delay lines for high-precision terahertz time-domain spectroscopy

Abstract
Terahertz time-domain spectroscopy relies on the knowledge of the time delay between two ultrashort laser pulses. This time delay is most commonly introduced by mechanically driven delay lines, where often a linear movement or in the case of oscillation based devices a sinusoidal movement is assumed or measured only imprecisely. We present a highly accurate method to measure the real time delay by overlapping the ultrashort pulse with one optical branch of a Mach-Zehnder interferometer. The interferogram provides an exact time base for the terahertz signal and enables high-precision time-domain spectroscopy even with inherently highly inaccurate delay lines.
Author(s)
Molter, Daniel
Fraunhofer-Institut für Physikalische Messtechnik IPM
Trierweiler, Manuel
Fraunhofer-Institut für Physikalische Messtechnik IPM
Ellrich, Frank
Fraunhofer-Institut für Physikalische Messtechnik IPM
Jonuscheit, Joachim
Fraunhofer-Institut für Physikalische Messtechnik IPM
Freymann, Georg von
Fraunhofer-Institut für Physikalische Messtechnik IPM
Hauptwerk
41st International Conference on Infrared, Millimeter, and Terahertz waves, IRMMW-THz 2016
Konferenz
International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) 2016
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DOI
10.1109/IRMMW-THz.2016.7758584
Language
Englisch
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IPM
Tags
  • Terahertz Spectroscop...

  • Delays

  • Mach-Zehnder Interfer...

  • Optical Delay Lines

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