title: Frequency stabilisation of a fibre-laser comb using a novel microstructured fibre.
abstract: There is great interest in developing high performance optical frequency metrology based around mode-locked fibre lasers because of their low cost, small size and long-term turnkey operation when compared to the solid-state alternative. We present a method for stabilising the offset frequency of a fibre-based laser comb using a 2 f - 3 f technique based around a unique fibre that exhibits strong resonant dispersive wave emission. This fibre requires lower power than conventional highly non-linear fibre to generate a suitable signal for offset frequency stabilisation and this in turn avoids the complexity of additional nonlinear steps. We generate an offset frequency signal from the mixing of a wavelength-shifted second harmonic comb with a third harmonic of the comb. Additionally, we have stabilised the repetition rate of the laser to a level better than 10(-14)/ radicaltau , limited by the measurement system noise floor.We present the means for complete and precise measurement of the transfer function of the laser frequency controls.
authors.affiliation: School of Physics, University of Western Australia, Australia. clocke@physics.uwa.edu.au
authors.forename: C R
authors.initials: CR
authors.lastname: Locke
authors.forename: E N
authors.initials: EN
authors.lastname: Ivanov
authors.forename: P S
authors.initials: PS
authors.lastname: Light
authors.forename: F
authors.initials: F
authors.lastname: Benabid
authors.forename: A N
authors.initials: AN
authors.lastname: Luiten