title: Phase-locked carrier-envelope-offset frequency at 1560 nm.
abstract: We report on the measurement of an Erbium-fiber oscillator's carrier-envelope-offset frequency using an extruded SF6 photonic crystal fiber for the generation of a more than two octave-spanning supercontinuum from 400 nm to beyond 1750 nm. A modified type of f-2f-interferometer was employed, beating the frequency doubled input signal of the fiber oscillator with the supercontinuum to generate the carrier-envelope-offset beat. Controlling the fiber oscillator's pump power with an electronic feedback loop, we phase-locked the carrier-envelope-offset frequency to an external reference source. The resulting residual phase excursions correspond to fractional frequency instabilities of the oscillator's frequency comb of the order of 10(-16) for averaging times longer than 10 s.
authors.forename: Holger
authors.initials: H
authors.lastname: Hundertmark
authors.forename: Dieter
authors.initials: D
authors.lastname: Wandt
authors.forename: Carsten
authors.initials: C
authors.lastname: Fallnich
authors.forename: Nils
authors.initials: N
authors.lastname: Haverkamp
authors.forename: Harald
authors.initials: H
authors.lastname: Telle