Mode Number Determination of Optical Cavities for Next Generations of Gravity Missions

authored by: Timm Wegehaupt, Sariga Sachit, Vitali Müller, Gerhard Heinzel, Claus Braxmaier, Jens Grosse
Abstract: Next generations of gravity missions require new technologies for an absolute frequency determination of cavity stabilized lasers. One proposed technology uses a readout of the free spectral range of the cavity to process it along with the mode number to the absolute frequency. This technology would require only a small amount of hardware but presupposes a stable mode number. In a laboratory experiment, this technology is analyzed for an existing high finesse cavity setup and the mode number is determined with an accuracy up to three digits. These measurements carry out a non-negligible fractional offset of α = 0.786 ± 0.003, where a part of γ = 0.69 is probably caused by the mirror coatings. For further investigation of how external influences can affect this offset, the plans for a new compact cavity setup which is designed precisely for these studies are presented here.
Organisation(s): Institute of Gravitation Physics
CRC 1464: Relativistic and Quantum-Based Geodesy (TerraQ)
External Organisation(s): University of Bremen
German Aerospace Center (DLR)
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Ulm University
Type: Conference contribution
No. of pages: 4
Publication date: 2023
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Computer Networks and Communications, Signal Processing, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Instrumentation
Electronic version(s): https://doi.org/10.1109/EFTF/IFCS57587.2023.10272219 (Access: Closed)

BibTeX

@inproceedings{bce030ef5b5340b5978ee0d0fe1560e8,
title = "Mode Number Determination of Optical Cavities for Next Generations of Gravity Missions",
abstract = "Next generations of gravity missions require new technologies for an absolute frequency determination of cavity stabilized lasers. One proposed technology uses a readout of the free spectral range of the cavity to process it along with the mode number to the absolute frequency. This technology would require only a small amount of hardware but presupposes a stable mode number. In a laboratory experiment, this technology is analyzed for an existing high finesse cavity setup and the mode number is determined with an accuracy up to three digits. These measurements carry out a non-negligible fractional offset of α = 0.786 ± 0.003, where a part of γ = 0.69 is probably caused by the mirror coatings. For further investigation of how external influences can affect this offset, the plans for a new compact cavity setup which is designed precisely for these studies are presented here.",
keywords = "absolute frequency, next generation gravity missions, optical cavity, optical metrology",
author = "Timm Wegehaupt and Sariga Sachit and Vitali M{\"u}ller and Gerhard Heinzel and Claus Braxmaier and Jens Grosse",
note = "Funding Information: This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – Project-ID 434617780 – SFB 1464 ; 2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2023 ; Conference date: 15-05-2023 Through 19-05-2023",
year = "2023",
doi = "10.1109/EFTF/IFCS57587.2023.10272219",
language = "English",
isbn = "9798350311433",
booktitle = "Proceedings 2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
address = "United States",
}