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



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


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.
Optics Letters


frequency comb, optical free induction decay, spectroscopy


Coddington, I. , Swann, W. and Newbury, N. (2010), Time-domain spectroscopy of the optical free-induction decay from vibrating molecules, Optics Letters, [online], (Accessed June 15, 2024)


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Created April 26, 2010, Updated February 19, 2017