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Type: Journal article
Title: Self-heterodyne interference spectroscopy using a comb generated by pseudo-random modulation
Author: Hébert, N.
Michaud-Belleau, V.
Anstie, J.
Deschênes, J.
Luiten, A.
Genest, J.
Citation: Optics Express, 2015; 23(21):27806-27818
Publisher: Optical Society of America
Issue Date: 2015
ISSN: 1094-4087
Statement of
Nicolas Bourbeau Hébert, Vincent Michaud-Belleau, James D. Anstie, Jean-Daniel Deschênes, Andre N. Luiten, and Jérôme Genest
Abstract: We present an original instrument designed to accomplish high-speed spectroscopy of individual optical lines based on a frequency comb generated by pseudo-random phase modulation of a continuous-wave (CW) laser. This approach delivers efficient usage of the laser power as well as independent control over the spectral point spacing, bandwidth and central wavelength of the comb. The comb is mixed with a local oscillator generated from the same CW laser frequency-shifted by an acousto-optic modulator, enabling a self-heterodyne detection scheme. The current configuration offers a calibrated spectrum every 1.12 µs. We demonstrate the capabilities of the spectrometer by producing averaged, as well as time-resolved, spectra of the D1 transition of cesium with a 9.8-MHz point spacing, a 50-kHz resolution and a span of more than 3 GHz. The spectra obtained after 1 ms of averaging are fitted with complex Voigt profiles that return parameters in good agreement with expected values.
Rights: © 2015 Optical Society of America
RMID: 0030037179
DOI: 10.1364/OE.23.027806
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Appears in Collections:IPAS publications

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