Precision cavity enhanced velocity modulation spectroscopy

Andrew A. Mills; Brian M. Siller; Benjamin J. McCall

doi:10.1016/j.cplett.2010.10.002

Precision cavity enhanced velocity modulation spectroscopy

Andrew A. Mills, Brian M. Siller, Benjamin J. McCall

Chemistry

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

Abstract

The new technique of cavity enhanced velocity modulation spectroscopy has been further developed, incorporating a tighter cavity to laser lock and an optical frequency comb for absolute frequency calibration. Several N2+ transitions have been observed with much higher precision than previously possible, and transitions that were blended in earlier Doppler-limited experiments are now resolved. The full-width at half-maximum of the observed Lamb dips is ∼40MHz, and appears to be dominated by a broadening due to the velocity modulation. Future extension of this technique into the mid-infrared should enable significant improvements in the sensitivity and resolution of vibrational spectroscopy of molecular ions.

Original language	English (US)
Pages (from-to)	1-5
Number of pages	5
Journal	Chemical Physics Letters
Volume	501
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2010.10.002
State	Published - Dec 6 2010

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Precision cavity enhanced velocity modulation spectroscopy",

abstract = "The new technique of cavity enhanced velocity modulation spectroscopy has been further developed, incorporating a tighter cavity to laser lock and an optical frequency comb for absolute frequency calibration. Several N2+ transitions have been observed with much higher precision than previously possible, and transitions that were blended in earlier Doppler-limited experiments are now resolved. The full-width at half-maximum of the observed Lamb dips is ∼40MHz, and appears to be dominated by a broadening due to the velocity modulation. Future extension of this technique into the mid-infrared should enable significant improvements in the sensitivity and resolution of vibrational spectroscopy of molecular ions.",

author = "Mills, {Andrew A.} and Siller, {Brian M.} and McCall, {Benjamin J.}",

note = "Funding Information: The authors are grateful to Prof. Benjamin Lev and Mr. Mingwu Lu for very helpful advice regarding laser locking electronics and techniques. This work has been supported by the NASA Laboratory Astrophysics program ( NNX08AN82G ), by an NSF CAREER award ( CHE-0449592 ), by an Air Force Young Investigator award ( FA9550-07-1-0128 ), and by the David and Lucile Packard Foundation. ",

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doi = "10.1016/j.cplett.2010.10.002",

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AU - Mills, Andrew A.

AU - Siller, Brian M.

AU - McCall, Benjamin J.

N1 - Funding Information: The authors are grateful to Prof. Benjamin Lev and Mr. Mingwu Lu for very helpful advice regarding laser locking electronics and techniques. This work has been supported by the NASA Laboratory Astrophysics program ( NNX08AN82G ), by an NSF CAREER award ( CHE-0449592 ), by an Air Force Young Investigator award ( FA9550-07-1-0128 ), and by the David and Lucile Packard Foundation.

PY - 2010/12/6

Y1 - 2010/12/6

N2 - The new technique of cavity enhanced velocity modulation spectroscopy has been further developed, incorporating a tighter cavity to laser lock and an optical frequency comb for absolute frequency calibration. Several N2+ transitions have been observed with much higher precision than previously possible, and transitions that were blended in earlier Doppler-limited experiments are now resolved. The full-width at half-maximum of the observed Lamb dips is ∼40MHz, and appears to be dominated by a broadening due to the velocity modulation. Future extension of this technique into the mid-infrared should enable significant improvements in the sensitivity and resolution of vibrational spectroscopy of molecular ions.

AB - The new technique of cavity enhanced velocity modulation spectroscopy has been further developed, incorporating a tighter cavity to laser lock and an optical frequency comb for absolute frequency calibration. Several N2+ transitions have been observed with much higher precision than previously possible, and transitions that were blended in earlier Doppler-limited experiments are now resolved. The full-width at half-maximum of the observed Lamb dips is ∼40MHz, and appears to be dominated by a broadening due to the velocity modulation. Future extension of this technique into the mid-infrared should enable significant improvements in the sensitivity and resolution of vibrational spectroscopy of molecular ions.

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Precision cavity enhanced velocity modulation spectroscopy

Abstract

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