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Stabilisation de fréquence de laser Nd:YAG pour applications spatiales

Abstract : Long term stabilised lasers are used in a multitude of metrological applications ; in the last few years their prospective use for space applications has been growing, fundamental physics experiments, geodesy...
This work concerns the stable lasers for the LISA project; in view of the potential space application, many criteria- compactness, mechanical stability, robustness and reliability- must be satisfied.
The possible references useful for the long term (iodine) and the short term (FP cavity) time intervals will be described together with their principal limitations. The discussion leading to their choice is coupled with the analysis of the stabilisation techniques to be implemented (PDH, Tilt-Locking, Modulation transfer).
Among the stabilisation techniques, the state of the art Pound-Drever-Hall (PDH) technique will be compared to the DC, active components poor Tilt Locking in the case of a monolithic Fabry-Perot reference.
For each technique and each reference, the description of noise sources and the expected error signals will be shown trhough simulation. Theoretical performances on the long term and quantum efficiencies will be compared for different techniques.
The second part gives the schematic principles of the experiences and the results obtained for lasers stabilised on Fabry-Perot oscillators and molecular iodine. To calibrate the Fabry-Perot drifts, its resonance frequency will be measured vs. the molecular transition, this will coupled with analytical and numerical solutions to control the length of this mechanical reference.
Finally in the appendices details about noise order of magnitudes for LISA (leading to laser specification), a theoretical overview of gravitational waves as well as different simulations and calculations will be shown.
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Submitted on : Monday, May 21, 2007 - 8:00:26 PM
Last modification on : Tuesday, October 19, 2021 - 6:59:05 PM
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  • HAL Id : tel-00148136, version 1



Linda Mondin. Stabilisation de fréquence de laser Nd:YAG pour applications spatiales. Physique Atomique [physics.atom-ph]. Université Nice Sophia Antipolis, 2005. Français. ⟨tel-00148136⟩



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