# Wavelength of the 3.39‐μm laser‐saturated absorption line of methane

@article{Barger1973WavelengthOT,
title={Wavelength of the 3.39‐$\mu$m laser‐saturated absorption line of methane},
author={Richard Lee Barger and John L. Hall},
journal={Applied Physics Letters},
year={1973},
volume={22},
pages={196-199}
}
• Published 15 February 1973
• Physics
• Applied Physics Letters
The wavelength of the 3.39‐μm line of methane has been measured with respect to the Kr86 6057‐A standard by using a frequency‐controlled Fabry‐Perot interferometer. We have exhaustively studied systematic offsets inherent in the experiment, including effects due to asymmetry of the Kr standard line. Lacking a convention relating the defined Kr wavelength 6057.802 105 A to observables of the krypton line (e.g., center of gravity or fringe maximum intensity point), we report two methane…
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