Precision cavity enhanced velocity modulation spectroscopy

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

Research output: Contribution to journalArticlepeer-review


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 languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalChemical Physics Letters
Issue number1-3
StatePublished - Dec 6 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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