Title: | Fractional frequency ratio difference time series data sets (Optical frequency comb comparison) |

Authors: | Benkler, Erik, Physikalisch-Technische Bundesanstalt, Fachbereich 4.3, Quantenoptik und Längeneinheit Sterr, Uwe, Physikalisch-Technische Bundesanstalt, Fachbereich 4.3, Quantenoptik und Längeneinheit Lipphardt, Burghard, Physikalisch-Technische Bundesanstalt, Fachbereich 4.4, Zeit und Frequenz Wilk, Rafal, TOPTICA Photonics AG, Gräfelfing (München) Puppe, Thomas, TOPTICA Photonics AG, Gräfelfing (München) Rohde, Felix, TOPTICA Photonics AG, Gräfelfing (München) |

Contributors: | HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887 |

Language: | en |

DOI: | 10.7795/720.20191108 |

Version: | 1 |

Resource Type: | Dataset / Measurement Data |

Publisher: | Physikalisch-Technische Bundesanstalt (PTB) |

Rights: |
https://creativecommons.org/licenses/by-nd/4.0/ CC BY-ND 4.0 (Creative Commons Attribution-NoDerivatives 4.0 International Public License) |

Dates: |
Available: 2019-11-08 |

File: |
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11.11 MB (11646558 Bytes)
MD5 Checksum: 96cf843c64eb834a51da88b76406a62d SHA256 Checksum: 049e0589b948b2127fbb041633adf4e275becc19249d45b103c4b7220b7ca6b8 |

Keywords: | Comb comparison ; End-to-end topology ; optical frequency transfer |

Abstract: | The two data sets contain time series which were determined in measurements evaluating the performance of an optical frequency transfer via frequency combs. The experiment and the physical background is discussed in a publication entitled "End-to-end topology for fiber comb based optical frequency transfer at the $10^{-21}$ level" in Optics Express, which cites these data sets. Furthermore, a preprint can be found at arXiv:1910.04261 There are two data sets, one for the NCP setup and one for the CP setup discussed in this manuscript. The files are UTF-8 encoded text files with tabulator-separated values in two columns. The first line is a header line, the following lines contain the time series data. The first column is the time in seconds since the beginning of the measurement. The second column is a fractional frequency ratio difference. These are pre-processed measurement data. The pre-processing steps consist in processing beat frequency data, which where measured using K&K FXE80 dead-time-free frequency counters in \Lambda-mode with a report time of 1s. In a first step, invalid data are identified and marked as invalid (e.g. if cycle slips occurred in phase-locked loops in the experiment). This results in gaps, i.e. the time stamps are in principle on 1s grid, but there can be periods without data longer than 1s. In the second step, several beat frequency data are processed according to equation (2) in the mentioned publication, yielding the fractional frequency ratio difference y_{DUT-ref} between the reference and DUT frequency transfer system. Statistical properties, like e.g. the mean value, linear drift, power spectral density, Allan deviation, modified Allan deviation, etc. can be derived from the y_{DUT-ref} time series. |

Citation: | Benkler, Erik ; Sterr, Uwe ; Lipphardt, Burghard ; Wilk, Rafal ; Puppe, Thomas ; Rohde, Felix. Fractional frequency ratio difference time series data sets (Optical frequency comb comparison). Physikalisch-Technische Bundesanstalt (PTB). DOI: 10.7795/720.20191108 |