Noise immune cavity enhanced optical heterodyne velocity modulation spectroscopy

Brian M. Siller; Michael W. Porambo; Andrew A. Mills; Benjamin J. McCall

doi:10.1364/OE.19.024822

Noise immune cavity enhanced optical heterodyne velocity modulation spectroscopy

Brian M. Siller, Michael W. Porambo, Andrew A. Mills, Benjamin J. McCall

Research output: Contribution to journal › Article › peer-review

Abstract

The novel technique of cavity enhanced velocity modulation spectroscopy has recently been demonstrated as the first general absorption technique that allows for sub-Doppler spectroscopy of molecular ions while retaining ion-neutral discrimination. The previous experimental setup has been further improved with the addition of heterodyne detection in a NICE-OHMS setup. This improves the sensitivity by a factor of 50 while retaining sub-Doppler resolution and ion-neutral discrimination. Calibration was done with an optical frequency comb, and line centers for several N⁺₂ lines have been determined to within an accuracy of 300 kHz.

Original language	English (US)
Pages (from-to)	24822-24827
Number of pages	6
Journal	Optics Express
Volume	19
Issue number	24
DOIs	https://doi.org/10.1364/OE.19.024822
State	Published - Nov 21 2011
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.19.024822

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language = "English (US)",

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AU - Porambo, Michael W.

AU - Mills, Andrew A.

AU - McCall, Benjamin J.

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AB - The novel technique of cavity enhanced velocity modulation spectroscopy has recently been demonstrated as the first general absorption technique that allows for sub-Doppler spectroscopy of molecular ions while retaining ion-neutral discrimination. The previous experimental setup has been further improved with the addition of heterodyne detection in a NICE-OHMS setup. This improves the sensitivity by a factor of 50 while retaining sub-Doppler resolution and ion-neutral discrimination. Calibration was done with an optical frequency comb, and line centers for several N+2 lines have been determined to within an accuracy of 300 kHz.

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Noise immune cavity enhanced optical heterodyne velocity modulation spectroscopy

Abstract

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