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, ORCID: 0000-0001-7907-849X
Sterr, Uwe, Physikalisch-Technische Bundesanstalt, Fachbereich 4.3, Quantenoptik und Längeneinheit, ORCID: 0000-0001-5661-769X
Lipphardt, Burghard, Physikalisch-Technische Bundesanstalt, Fachbereich 4.4, Zeit und Frequenz, ORCID: 0000-0001-7039-1914
Wilk, Rafal, TOPTICA Photonics AG, Gräfelfing (München)
Puppe, Thomas, TOPTICA Photonics AG, Gräfelfing (München), ORCID: 0000-0002-1724-9019

Show all authors (6)
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
Classifications: INSPEC A0620 Metrology ; INSPEC A4260D Laser resonators and cavities ; INSPEC A4262E Metrological applications of lasers
File: Download File (application/zip) 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.
Other: EMPIR projects are co-funded by the European Union’s (EU) Horizon 2020 research and innovation programme and the EMPIR participating states.
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
Funding: European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Optical clocks with 1 × 10-18 uncertainty, Grant Number: EMPIR 15SIB03 OC18
European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Robust optical clocks for international timescales, Grant Number: EMPIR 18SIB05 ROCIT