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Proceedings Paper

Coherent Raman dual-comb spectroscopy and imaging
Author(s): Takuro Ideguchi; Simon Holzner; Birgitta Bernhardt; Guy Guelachvili; Theodor W. Hänsch; Nathalie Picqué
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Paper Abstract

The invention of the optical frequency comb technique has revolutionized the field of precision spectroscopy, providing a way to measure the absolute frequency of any optical transition. Since, frequency combs have become common equipment for frequency metrology. In the last decade, novel applications for the optical frequency comb have been demonstrated beyond its original purpose. Broadband molecular spectroscopy is one of those. One such technique of molecular spectroscopy with frequency combs, dual-comb Fourier transform spectroscopy provides short measurement times with resolution and accuracy. Two laser frequency combs with slightly different repetition frequencies generate pairs of pulses with a linearly-scanned delay between pulses in a pair. The system without moving parts mimics a fast scanning Fourier transform interferometer. The measurement speed may be several orders of magnitude faster than that of a Michelson-based Fourier transform spectrometer, which opens up new opportunities for broadband molecular spectroscopy. Recently, dual-comb spectroscopy has been extended to nonlinear phenomena. A broadband Raman spectrum of molecular fingerprints may be measured within a few tens of microseconds with coherent Raman dual-comb spectroscopy. Raster scanning the sample leads to hyperspectral images. This rapid and broadband label-free vibrational spectroscopy and imaging technique might provide new diagnostic methods in a variety of scientific and industrial fields.

Paper Details

Date Published: 13 November 2014
PDF: 6 pages
Proc. SPIE 9279, Real-time Photonic Measurements, Data Management, and Processing, 92790S (13 November 2014); doi: 10.1117/12.2071156
Show Author Affiliations
Takuro Ideguchi, Max-Planck-Institut für Quantenoptik (Germany)
Simon Holzner, Max-Planck-Institut für Quantenoptik (Germany)
Birgitta Bernhardt, Max-Planck-Institut für Quantenoptik (Germany)
Guy Guelachvili, Institut des Sciences Moléculaires d’Orsay, CNRS, Univ. Paris-Sud (France)
Theodor W. Hänsch, Max-Planck-Institut für Quantenoptik (Germany)
Ludwig-Maximilians-Univ. München (Germany)
Nathalie Picqué, Max-Planck-Institut für Quantenoptik (Germany)
Ludwig-Maximilians-Univ. München (Germany)
Institut des Sciences Moléculaires d'Orsay (France)

Published in SPIE Proceedings Vol. 9279:
Real-time Photonic Measurements, Data Management, and Processing
Bahram Jalali; Ming Li; Keisuke Goda; Mohammad Hossein Asghari, Editor(s)

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