| Title: |
An Yb transportable clock connected to the REFIMEVE fiber network for chronometric geodesy |
| Authors: |
Rahmouni, Fatima; Romero González, Jesús; Pointard, Benjamin; Pottie, Paul-Eric; Lion, Guillaume; Jamet, Olivier; Lalancette, Marie-Francoise; Moreno, William; Lodewyck, Jérôme; Le Targat, Rodolphe |
| Contributors: |
Systèmes de Référence Temps Espace (SYRTE); Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Laboratoire national de métrologie et d'essais - Systèmes de Référence Temps-Espace (LNE - SYRTE); Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris; Métrologie des fréquences optiques (FOP); Real Instituto y Observatorio de la Armada (ROA); Observatoire de Paris; Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL); Institut de Physique du Globe de Paris (IPGP - UMR_7154); Institut national des sciences de l'Univers (INSU - CNRS)-Institut National de l'Information Géographique et Forestière IGN (IGN)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); École nationale des sciences géographiques (ENSG); Institut National de l'Information Géographique et Forestière IGN (IGN)-Université Gustave Eiffel; Laboratoire National de Métrologie et d’Essais–Système de Références Temps-Espace Paris; ANR-20-CE47-0006,ROYMAGE,hoRloge Optique à Ytterbium Mobile Appliquée à l'exploration GEodésique(2020) |
| Source: |
EGU23 ; https://hal.science/hal-04093675 ; EGU23, Apr 2023, Vienna (AUSTRIA), France. 2023, ⟨10.5194/egusphere-egu23-8745⟩ |
| Publisher Information: |
CCSD |
| Publication Year: |
2023 |
| Subject Terms: |
[PHYS]Physics [physics] |
| Subject Geographic: |
Vienna (AUSTRIA); France |
| Description: |
International audience ; As a direct consequence of the gravitational time dilation predicted by Einstein, atomic clock frequencies depend on the local gravitational potential. Several groups in the world have developed the capacity to control the frequency of a new generation of optical clocks at the 18 digits level, which corresponds to the ability to detect 1 cm height changes. Therefore, it raises the perspective of contributing to a refined definition of the geoid by rivaling traditional geodesy techniques, based either on satellites or on spirit leveling. Transportable optical clocks have drawn considerable interest in the last years [1-3], as they are the only ground-based instruments able to perform a mapping of geopotential variations [4]. In this context, SYRTE has started the development of a new optical lattice clock based on neutral Ytterbium, on top of 3 stationary optical clocks (neutral strontium or mercury) already operational in the lab. It is designed to be transportable and aims at an uncertainty in the 10 -18 range. This new optical frequency standard will exploit the research infrastructure REFIMEVE, a metrological fiber network disseminating throughout the French territory a 1542 nm ultrastable frequency reference [5]. The ~60 outputs spread along the link will allow us to remotely compare it to the ~12 stationary European optical clocks that are already connected to the network. We will present a description of the clock design, stressing the technological and conceptual choices that we did in prevision for the field conditions outside of a well-controlled lab. We will notably discuss the strategy we follow to reduce the deadtime in order to adapt to the reduced stability of the clock. It allows us to adapt to the spectral degradation of the narrow laser probing the metrological transition due to field conditions (vibrations, temperature gradients …). Thanks to the operational capacity of the REFIMEVE infrastructure to deliver not only a stable but also accurate optical signal, we will ... |
| Document Type: |
conference object; still image |
| Language: |
English |
| DOI: |
10.5194/egusphere-egu23-8745 |
| Availability: |
https://hal.science/hal-04093675; https://hal.science/hal-04093675v1/document; https://hal.science/hal-04093675v1/file/egu%20%281%29.pdf; https://doi.org/10.5194/egusphere-egu23-8745 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.A6E2CD10 |
| Database: |
BASE |