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Coherent Multiheterodyne Spectroscopy Using Stabilized Optical Frequency Combs

Ian Coddington, William C. Swann, and Nathan R. Newbury
Phys. Rev. Lett. 100, 013902 – Published 2 January 2008; Erratum Phys. Rev. Lett. 101, 049901 (2008)

Abstract

The broadband, coherent nature of narrow-linewidth fiber frequency combs is exploited to measure the full complex spectrum of a molecular gas through multiheterodyne spectroscopy. We measure the absorption and phase shift experienced by each of 155 000 individual frequency-comb lines, spaced by 100 MHz and spanning from 1495 to 1620 nm, after passing through hydrogen cyanide gas. The measured phase spectrum agrees with the Kramers-Kronig transformation of the absorption spectrum. This technique can provide a full complex spectrum rapidly, over wide bandwidths, and with hertz-level accuracy.

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  • Received 17 October 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.013902

Erratum

Erratum: Coherent Multiheterodyne Spectroscopy Using Stabilized Optical Frequency Combs [Phys. Rev. Lett. 100, 013902 (2008)]

Ian Coddington, William C. Swann, and Nathan R. Newbury
Phys. Rev. Lett. 101, 049901 (2008)

Authors & Affiliations

Ian Coddington, William C. Swann, and Nathan R. Newbury

  • National Institute for Standards and Technology, Boulder, Colorado 80305, USA

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Issue

Vol. 100, Iss. 1 — 11 January 2008

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