title: Time-dependent laser linewidth: beat-note digital acquisition and numerical analysis.
abstract: We revisit and improve the optical heterodyne technique for the measurement of the laser coherence, by digital acquisition of the beat-note and numerical analysis of the resulting signal. Our main result is that with the same experimental setup we reach the very "short-time linewidth" with the highest accuracy as well as the frequency noise spectrum.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Von Bandel
authors.forename: Mikhaël
authors.initials: M
authors.lastname: Myara
authors.forename: Mohamed
authors.initials: M
authors.lastname: Sellahi
authors.forename: Tahar
authors.initials: T
authors.lastname: Souici
authors.forename: Rémi
authors.initials: R
authors.lastname: Dardaillon
authors.forename: Philippe
authors.initials: P
authors.lastname: Signoret