title: Mode-locking optimization with a real-time feedback system in a Nd:yttrium lithium fluoride laser cavity.
abstract: We present a control system, which allows an automatic optimization of the pulse train stability in a mode-locked laser cavity. In order to obtain real-time corrections, we chose a closed loop approach. The control variable is the cavity length, mechanically adjusted by gear system acting on the rear cavity mirror, and the controlled variable is the envelope modulation of the mode-locked pulse train. Such automatic control system maintains the amplitude of the mode-locking pulse train stable within a few percent rms during the working time of the laser. Full implementation of the system on an Nd:yttrium lithium fluoride actively mode-locked laser is presented.
authors.affiliation: Dipartimento di Fisica G.Occhialini, Università di Milano Bicocca, Milano, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Marengoni
authors.forename: F
authors.initials: F
authors.lastname: Canova
authors.forename: D
authors.initials: D
authors.lastname: Batani
authors.forename: R
authors.initials: R
authors.lastname: Benocci
authors.forename: M
authors.initials: M
authors.lastname: Librizzi
authors.forename: V
authors.initials: V
authors.lastname: Narayanan
authors.forename: M
authors.initials: M
authors.lastname: Gomareschi
authors.forename: G
authors.initials: G
authors.lastname: Lucchini
authors.forename: A
authors.initials: A
authors.lastname: Kilpio
authors.forename: E
authors.initials: E
authors.lastname: Shashkov
authors.forename: I
authors.initials: I
authors.lastname: Stuchebrukhov
authors.forename: V
authors.initials: V
authors.lastname: Vovchenko
authors.forename: V
authors.initials: V
authors.lastname: Chernomyrdin
authors.forename: I
authors.initials: I
authors.lastname: Krasuyk
authors.forename: T
authors.initials: T
authors.lastname: Hall
authors.forename: S
authors.initials: S
authors.lastname: Bittanti
mesh_terms: D005459:Fluorides; D007834:Lasers; D008094:Lithium; D009354:Neodymium; D013997:Time Factors; D015019:Yttrium
chemical_list: D009354:Neodymium; D015019:Yttrium; D008094:Lithium; D005459:Fluorides