title: Note: Efficient diode laser line narrowing using dual, feed-forward + feed-back laser frequency control.
abstract: We have achieved distributed feedback laser diode line narrowing by simultaneously acting on the diode current via a feed-back loop and on an external electrooptic phase modulator in feed-forward actuator. This configuration turns out to be very efficient in reaching large bandwidth in the phase correction: up to 15 MHz with commercial laser control units. About 98% of the laser power undergoes narrowing. The full width at half maximum of the narrowed optical spectrum is of less than 4 kHz. This configuration appears to be very convenient as the delay in the feed-forward control electronics is easily compensated for by a 20 m optical fiber roll.
authors.affiliation: Laboratoire ARTEMIS, Universite Cote d'Azur, Observatoire de la Cote d'Azur, CNRS, Nice 06304, France.
authors.forename: M
authors.identifier: 0000000336019945
authors.initials: M
authors.lastname: Lintz
authors.affiliation: Laboratoire ARTEMIS, Universite Cote d'Azur, Observatoire de la Cote d'Azur, CNRS, Nice 06304, France.
authors.forename: D H
authors.initials: DH
authors.lastname: Phung
authors.affiliation: Laboratoire ARTEMIS, Universite Cote d'Azur, Observatoire de la Cote d'Azur, CNRS, Nice 06304, France.
authors.forename: J-P
authors.initials: JP
authors.lastname: Coulon
authors.affiliation: Centre National d'Etudes Spatiales, 18 Rue Edouard Belin, Toulouse 31401, France.
authors.forename: B
authors.initials: B
authors.lastname: Faure
authors.affiliation: Centre National d'Etudes Spatiales, 18 Rue Edouard Belin, Toulouse 31401, France.
authors.forename: T
authors.initials: T
authors.lastname: Lévèque