title: Analysis of the feed-forward method for the referencing of a CW laser to a frequency comb.
abstract: We report on a comprehensive theoretical and experimental analysis of the feed-forward method for external frequency stabilization of a continuous wave laser against a frequency comb. Application of the method to a distributed feedback diode laser at 1.55 μm allows line narrowing from 800 to 10 kHz, with frequency noise reduction by more than 2 decades up to a Fourier frequency of 100 kHz and a maximum control bandwidth of 0.8 MHz. The results are consistent with a relative phase fluctuation of 1.4 rad rms, as limited by uncompensated high-frequency noise of the slave laser.
authors.affiliation: Dipartimento di Fisica, Politecnico di Milano, Piazza L da Vinci 32, 20133 Milano, Italy. d.gatti@.polimi.it
authors.forename: D
authors.initials: D
authors.lastname: Gatti
authors.forename: T
authors.initials: T
authors.lastname: Sala
authors.forename: A
authors.initials: A
authors.lastname: Gambetta
authors.forename: N
authors.initials: N
authors.lastname: Coluccelli
authors.forename: G Nunzi
authors.initials: GN
authors.lastname: Conti
authors.forename: G
authors.initials: G
authors.lastname: Galzerano
authors.forename: P
authors.initials: P
authors.lastname: Laporta
authors.forename: M
authors.initials: M
authors.lastname: Marangoni