Validating frequency transfer via interferometric fiber links for optical clock comparisons
We investigate the validation of fiber-based optical frequency transfer for frequency comparison applications. We specifically consider the frequency transfer validation for remote optical clock comparisons and want to ensure interferometric fiber link uncertainty contributions below the combined un...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2021-01-01
|
| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac21a0 |
| _version_ | 1797750034077319168 |
|---|---|
| author | Sebastian Koke Erik Benkler Alexander Kuhl Gesine Grosche |
| author_facet | Sebastian Koke Erik Benkler Alexander Kuhl Gesine Grosche |
| author_sort | Sebastian Koke |
| collection | DOAJ |
| description | We investigate the validation of fiber-based optical frequency transfer for frequency comparison applications. We specifically consider the frequency transfer validation for remote optical clock comparisons and want to ensure interferometric fiber link uncertainty contributions below the combined uncertainty of the clocks under test. The validation is based on signals obtained via looping back from the remote end to the sender site and comparing the input with the output of the loop. These loop-back data need to be averaged over intervals for reaching the validation goal, as the short-term instability of long-distance interferometric fiber links is typically higher than that of optical clocks. We introduce a two-step validation approach and address the finding of a compromise between opposing aspects of averaging: reaching low uncertainties versus achieving a high data coverage of the validated data set via a high temporal resolution of the fault identification. We discuss the impact of different averaging types and of the tolerance of filtering criteria on the achievable estimated uncertainty and on the coverage of the validated data set. Data from four multiple-week-long measurement campaigns on the fiber link between Physikalisch-Technische Bundesansanstalt and University of Strasbourg are used for this assessment. |
| first_indexed | 2024-03-12T16:26:57Z |
| format | Article |
| id | doaj.art-e891ba8895254d819b7b4268e6d7c393 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:26:57Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-e891ba8895254d819b7b4268e6d7c3932023-08-08T15:41:45ZengIOP PublishingNew Journal of Physics1367-26302021-01-0123909302410.1088/1367-2630/ac21a0Validating frequency transfer via interferometric fiber links for optical clock comparisonsSebastian Koke0https://orcid.org/0000-0002-2393-5701Erik Benkler1https://orcid.org/0000-0001-7907-849XAlexander Kuhl2https://orcid.org/0000-0003-4306-8075Gesine Grosche3Physikalisch-Technische Bundesanstalt , Bundesallee 100, 38116 Braunschweig, GermanyPhysikalisch-Technische Bundesanstalt , Bundesallee 100, 38116 Braunschweig, GermanyPhysikalisch-Technische Bundesanstalt , Bundesallee 100, 38116 Braunschweig, GermanyPhysikalisch-Technische Bundesanstalt , Bundesallee 100, 38116 Braunschweig, GermanyWe investigate the validation of fiber-based optical frequency transfer for frequency comparison applications. We specifically consider the frequency transfer validation for remote optical clock comparisons and want to ensure interferometric fiber link uncertainty contributions below the combined uncertainty of the clocks under test. The validation is based on signals obtained via looping back from the remote end to the sender site and comparing the input with the output of the loop. These loop-back data need to be averaged over intervals for reaching the validation goal, as the short-term instability of long-distance interferometric fiber links is typically higher than that of optical clocks. We introduce a two-step validation approach and address the finding of a compromise between opposing aspects of averaging: reaching low uncertainties versus achieving a high data coverage of the validated data set via a high temporal resolution of the fault identification. We discuss the impact of different averaging types and of the tolerance of filtering criteria on the achievable estimated uncertainty and on the coverage of the validated data set. Data from four multiple-week-long measurement campaigns on the fiber link between Physikalisch-Technische Bundesansanstalt and University of Strasbourg are used for this assessment.https://doi.org/10.1088/1367-2630/ac21a0optical frequency disseminationoptical fiber linksoptical clocksoptical clock comparisonsultra-stable lasers |
| spellingShingle | Sebastian Koke Erik Benkler Alexander Kuhl Gesine Grosche Validating frequency transfer via interferometric fiber links for optical clock comparisons New Journal of Physics optical frequency dissemination optical fiber links optical clocks optical clock comparisons ultra-stable lasers |
| title | Validating frequency transfer via interferometric fiber links for optical clock comparisons |
| title_full | Validating frequency transfer via interferometric fiber links for optical clock comparisons |
| title_fullStr | Validating frequency transfer via interferometric fiber links for optical clock comparisons |
| title_full_unstemmed | Validating frequency transfer via interferometric fiber links for optical clock comparisons |
| title_short | Validating frequency transfer via interferometric fiber links for optical clock comparisons |
| title_sort | validating frequency transfer via interferometric fiber links for optical clock comparisons |
| topic | optical frequency dissemination optical fiber links optical clocks optical clock comparisons ultra-stable lasers |
| url | https://doi.org/10.1088/1367-2630/ac21a0 |
| work_keys_str_mv | AT sebastiankoke validatingfrequencytransferviainterferometricfiberlinksforopticalclockcomparisons AT erikbenkler validatingfrequencytransferviainterferometricfiberlinksforopticalclockcomparisons AT alexanderkuhl validatingfrequencytransferviainterferometricfiberlinksforopticalclockcomparisons AT gesinegrosche validatingfrequencytransferviainterferometricfiberlinksforopticalclockcomparisons |