title: Dual-channel multiplex system for precise measurement of displacement and shape of spectral lines.
abstract: The comparison of two spectral lines of almost identical wavelength can be made by recording simultaneously the output of a single spectrometer fed by two sources. The two channels are separated either through time-sharing or through modulation at two different frequencies and synchronous detection. Wavelength shifts as small as 1 mA have been determined for a measured shift/width ratio less than 0.05 on cesium absorption lines broadened by rare gases.
authors.forename: F
authors.initials: F
authors.lastname: Rostas
authors.forename: J L
authors.initials: JL
authors.lastname: Lemaire
authors.forename: P
authors.initials: P
authors.lastname: Felenbok