Offset Laser Frequency Stabilization Using Modulation Transfer Spectroscopy

The paper examines a key part of the laser system used in cold atomic gravimeters. The optical system of an atomic gravimeter requires the stabilization of laser frequency offset from the atomic transition. In this connection, the authors propose an offset frequency stabilization method for a freque...

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Bibliographic Details
Published in:Measurement techniques 2023-04, Vol.66 (1), p.1-5
Main Authors: Osipenko, G. V., Aleynikov, M. S., Sukhoverskaya, A. G.
Format: Article
Language:English
Subjects:
Amplitudes
Analytical Chemistry
Broadband
Characterization and Evaluation of Materials
Circular polarization
Error analysis
Error signals
Fiber lasers
Frequency stabilization
Frequency standards
General Problems of Metrology and Measurement Techniques
Gravimeters
Laser cooling
Laser stability
Lasers
Measurement Science and Instrumentation
Modulation
Modulators
Physical Chemistry
Physics
Physics and Astronomy
Radiation effects
Spectroscopy
Spectrum analysis
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Summary:The paper examines a key part of the laser system used in cold atomic gravimeters. The optical system of an atomic gravimeter requires the stabilization of laser frequency offset from the atomic transition. In this connection, the authors propose an offset frequency stabilization method for a frequency-doubled fiber laser. The developed method is based on modulation transfer spectroscopy and the use of a broadband electro-optic modulator. An experimental setup for implementing the proposed method is described. In the study, error signals were obtained, enabling the offset frequency stabilization of a frequency-doubled fiber laser. In order to achieve the maximum amplitude of the error signal, the following parameters of the experimental setup were optimized: cell temperature, the intensity of the probe and saturation beams, as well as the amplitudes of signals fed to the electro-optic modulators. In addition, the effect of radiation polarization on the signal amplitude was examined. Circular polarization is shown to produce an error signal having a higher amplitude. The obtained results can be used in the development of a quantum gravimeter, quantum frequency standards, as well as in experiments involving laser cooling of atoms.
ISSN:0543-1972
1573-8906
DOI:10.1007/s11018-023-02182-0