title: High-bandwidth transfer of phase stability through a fiber frequency comb.
abstract: We demonstrate phase locking of a 729 nm diode laser to a 1542 nm master laser via an erbium-doped-fiber frequency comb, using a transfer-oscillator feedforward scheme which suppresses the effect of comb noise in an unprecedented 1.8 MHz bandwidth. We illustrate its performance by carrying out coherent manipulations of a trapped calcium ion with 99 % fidelity even at few-μs timescales. We thus demonstrate that transfer-oscillator locking can provide sufficient phase stability for high-fidelity quantum logic manipulation even without pre-stabilization of the slave diode laser.
authors.forename: Nils
authors.initials: N
authors.lastname: Scharnhorst
authors.forename: Jannes B
authors.initials: JB
authors.lastname: Wübbena
authors.forename: Stephan
authors.initials: S
authors.lastname: Hannig
authors.forename: Kornelius
authors.initials: K
authors.lastname: Jakobsen
authors.forename: Johannes
authors.initials: J
authors.lastname: Kramer
authors.forename: Ian D
authors.initials: ID
authors.lastname: Leroux
authors.forename: Piet O
authors.initials: PO
authors.lastname: Schmidt