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A New Modulation Method for Sensitive Nonlinear Spectroscopy - Application to Molecular Overtones as Visible Frequency References

Published

Author(s)

L -. Ma, Jun Ye, P Dub, John L. Hall

Abstract

Following de Labachelerie, Nadagawa and Ohtsu (Ref. 6), we note the possibility to obtain saturated absoption spectra of a weakly-absorbing gas sample by placing it within an external high-finesse resonator. A principal disadvantage of this approach, the ready conversion of frequency noise into amplitude noise, can be totally avoided by rf detection methods when the rf modulation frequency is chosen to match the external cavity's free-spectural range. Excellent spectra are obtained from 5 ppm absorption by C2H2 in the 790 nm v1+ 3 v3 band.
Proceedings Title
Laser Spectroscopy, International Conference | 12th | | World Scientific Publishing Company
Volume
12
Conference Dates
June 12-16, 1995
Conference Location
Capri, 1, IT
Conference Title
Laser Review

Keywords

acetylene, molecular overtones, optical frequency standards, saturated absoption, ultrasensitive spectroscopy

Citation

Ma, L. , Ye, J. , Dub, P. and Hall, J. (1996), A New Modulation Method for Sensitive Nonlinear Spectroscopy - Application to Molecular Overtones as Visible Frequency References, Laser Spectroscopy, International Conference | 12th | | World Scientific Publishing Company, Capri, 1, IT (Accessed April 14, 2024)
Created May 31, 1996, Updated October 12, 2021