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Publication Citation: Time-domain spectroscopy of the optical free-induction decay from vibrating molecules

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Author(s): Ian R. Coddington; William C. Swann; Nathan R. Newbury;
Title: Time-domain spectroscopy of the optical free-induction decay from vibrating molecules
Published: April 26, 2010
Abstract: Time-domain spectroscopy using dual, coherent frequency combs is used to measure free-induction decay from a molecular gas sample in the near-IR with a time-domain signal-to-noise ratio of ~106 over a ~6 ns window at 55 fs time resolution (corresponding to the 9 THz source bandwidth) and a frequency/timing accuracy set by the frequency combs. The free-induction decay exhibits the expected periodic pulses from the rephasing of the multiply excited rovibrational levels. This demonstration represents the first high-resolution, high-accuracy, broadband measurement of optical free-induction decay, to our knowledge.
Citation: Optics Letters
Volume: 35
Issue: 9
Pages: pp. 1395 - 1397
Keywords: frequency comb; optical free induction decay; spectroscopy
Research Areas: Optical Metrology, Instrumentation, Remote Sensing, Laser Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (253KB)