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Precision Molecular Spectroscopy with Frequency Combs

Environment: Trace Gas Monitoring

  1. Davide Gatti1,
  2. Tommaso Sala1,
  3. Marco Marangoni1,
  4. Gianluca Galzerano2,
  5. Livio Gianfrani3

Published Online: 15 SEP 2012

DOI: 10.1002/9780470027318.a9249

Encyclopedia of Analytical Chemistry

Encyclopedia of Analytical Chemistry

How to Cite

Gatti, D., Sala, T., Marangoni, M., Galzerano, G. and Gianfrani, L. 2012. Precision Molecular Spectroscopy with Frequency Combs. Encyclopedia of Analytical Chemistry. .

Author Information

  1. 1

    Politecnico di Milano, Lecco campus, Italy

  2. 2

    Istituto di Fotonica e Nanotecnologie del CNR, Milano, Italy

  3. 3

    Seconda Università di Napoli, Caserta, Italy

Publication History

  1. Published Online: 15 SEP 2012


The advent of frequency combs has given tremendous impulse to the fields of high-resolution molecular spectroscopy and trace sensing of multiple gases. The combs' secret lies in their fine, discrete, stable, reproducible, and controllable spectral structure, readily referable to the primary microwave standard. These features make combs ideal tools to obtain on one side precision as well as absolute frequency calibration in the spectroscopic detection of individual absorption lines and, on the other side, to develop a new class of spectrometers where broadband coupling of combs to passive optical cavities allows extreme sensitivity to be conjugated with spectral resolution, broad spectral coverage, and fast acquisition times.