@article{Ma2007Frequ-5049,
  year={2007},
  doi={10.1109/JQE.2006.886836},
  title={Frequency Uncertainty for Optically Referenced Femtosecond Laser Frequency Combs},
  number={2},
  volume={43},
  journal={IEEE Journal of Quantum Electronics},
  pages={139--146},
  author={Ma, Long-Sheng and Bi, Zhiyi and Bartels, Albrecht and Kim, Kyoungsik and Robertsson, Lennart and Zucco, Massimo and Windeler, Robert S. and Wilpers, Guido and Oates, Chris and Hollberg, Leo and Diddams, Scott A.}
}

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    <dc:contributor>Hollberg, Leo</dc:contributor>
    <dc:contributor>Diddams, Scott A.</dc:contributor>
    <dc:creator>Ma, Long-Sheng</dc:creator>
    <dc:contributor>Bartels, Albrecht</dc:contributor>
    <dc:contributor>Oates, Chris</dc:contributor>
    <dc:creator>Zucco, Massimo</dc:creator>
    <dc:contributor>Windeler, Robert S.</dc:contributor>
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    <dcterms:abstract xml:lang="eng">We present measurements and analysis of the currently known relative frequency uncertainty of femtosecond laser frequency combs (FLFCs) based onKerr-lens mode-locked Ti:sapphire lasers. Broadband frequency combs generated directly from the laser oscillator, as well as octave-spanning combs generated with nonlinear optical fiber are compared. The relative frequency uncertainty introduced by an optically referenced FLFC is measured for both its optical and microwave outputs. We find that the relative frequency uncertainty of the optical and microwave outputs of the FLFC can be as low as 8 x 10 -20 and 1.7 x 10 -18, with a confidence level of 95%, respectively. Photo-detection of the optical pulse train introduces a small amount of excess noise, which degrades the stability and subsequent relative frequency uncertainty limit of the microwave output to 2.6 x  10 -17.</dcterms:abstract>
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    <dcterms:bibliographicCitation>IEEE Journal of Quantum Electronics ; 43 (2007), 2. - S. 139-146</dcterms:bibliographicCitation>
    <dc:creator>Wilpers, Guido</dc:creator>
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    <dc:creator>Diddams, Scott A.</dc:creator>
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    <dc:creator>Windeler, Robert S.</dc:creator>
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    <dc:contributor>Kim, Kyoungsik</dc:contributor>
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