Frequency stabilisation of a fibre-laser comb using a novel microstructured fibre

Clayton Locke, Eugene Ivanov, Philip Light, F. Benabid, Andre Luiten

    Research output: Contribution to journalArticlepeer-review

    7 Citations (Scopus)

    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/√τ , 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.© 2009 Optical Society of America
    Original languageEnglish
    Pages (from-to)5897-5904
    JournalOptics Express
    Volume17
    Issue number7
    DOIs
    Publication statusPublished - 2009

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