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Time-resolved phase spectroscopy from femtosecond free-induction decay

Qi Luo, Xiangyang Yu, Zhiren Qiu +3 more

Applied Physics BJan 1, 20006 citations

Time-resolved laser saturation spectroscopy. Theory of the free induction decay of two-level saturation resonances

Sunil Kumar, M. Ducloy

PramanaJul 1, 19803 citations

Baseline-Free Quantitative Absorption Spectroscopy Based on Molecular Free Induction Decay

Ryan K. Cole, Amanda S. Makowiecki, Nazanin Hoghooghi +1 more

We demonstrate baseline-free, quantitative absorption spectroscopy based on modifications to the free induction decay signal of molecules in the time domain. We apply the technique to a broad-absorbing mixture to retrieve concentrations with unprecedented accuracy. © 2019 The Author(s)

Conference on Lasers and Electro-OpticsMay 5, 20190 citations

Time-domain spectroscopy of molecular free-induction decay in the infrared

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 approximately 10(6) over a approximately 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.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 approximately 10(6) over a approximately 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 LettersApr 22, 201097 citations

The Use of Optical Cavities for Modern Atomic Molecular, and Optical Physics | NIST

J Ye, T. W. Lynn

Advances in atomic, molecular, and optical physicsDec 1, 20030 citations

Effect of the phase switching of the optical FID in magnetic field

Е. Н. Чесноков, Кубарев Виталий Владимирович, P. V. Koshlyakov +1 more

Abstract This work demonstrates the possibility of switching the phase of optical free induction decay (FID) in time-domain experiments. This possibility arises in experiments with paramagnetic molecules (free radicals) in a magnetic field. Changing the direction of the magnetic field alters the direction of rotation of the FID polarization plane and inverts the phase of one of the components of FID. This effect will be useful for heterodyne detection of the optical FID of the free radicals in the terahertz region.Abstract This work demonstrates the possibility of switching the phase of optical free induction decay (FID) in time-domain experiments. This possibility arises in experiments with paramagnetic molecules (free radicals) in a magnetic field. Changing the direction of the magnetic field alters the direction of rotation of the FID polarization plane and inverts the phase of one of the components of FID. This effect will be useful for heterodyne detection of the optical FID of the free radicals in the terahertz region.

Laser Physics LettersMar 18, 20222 citations

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

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