Absorption Measurements Using Frequency Modulation Heterodyne Spectroscopy

Edward A . Whittaker; Gary C. Bjorklund

doi:10.1117/12.936241

19 October 1983 Absorption Measurements Using Frequency Modulation Heterodyne Spectroscopy

Edward A . Whittaker, Gary C. Bjorklund

Proceedings Volume 0426, Laser-Based Ultrasensitive Spectroscopy and Detection V; (1983) https://doi.org/10.1117/12.936241
Event: 27th Annual Technical Symposium, 1983, San Diego, United States

Abstract

Direct absorption. measurements using Frequency. Modulation. Spectroscopy (FMS) have been made. Simple calibration is possible and DC absorptions as small as 1.4x10-4 may be detected. By modulating the absorption photochemically, the sensitivity may be extended to a lower limit of 1.5x10-7. The radicals HCO1 and ND4 have been studied using this method.

Citation Download Citation

Edward A . Whittaker and Gary C. Bjorklund "Absorption Measurements Using Frequency Modulation Heterodyne Spectroscopy", Proc. SPIE 0426, Laser-Based Ultrasensitive Spectroscopy and Detection V, (19 October 1983); https://doi.org/10.1117/12.936241

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