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Développement de sources lasers à l'état solide pour la réalisation d'une horloge optique basée sur l'atome d'argent

Yann Louyer 1
1 Laboratoire Charles Fabry de l'Institut d'Optique / Elsa
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : This work deals with the
development of an clock based on a two-photon transition in Ag at
661 nm, whose natural width is about 1 Hz. To take advantage of
the quality factor of the resonance, it will be necessary to use
laser-cooled atoms, the required wavelength being 328 nm. This
thesis describes the design and construction of solid-state lasers
allowing one to simplify the present apparatus. Diode-pumped
Nd:YLF crystals enable one to generate both 1322 and 1312 nm.
The second harmonic of the former will provide 661 nm while twice
frequency doubling the later will yield 328 nm. We have developed
a theoretical model including thermal effects and Auger
recombination in order to design several prototype configurations
(linear, twisted mode and re-injected ring cavities). Using the
last of these, we have built single-mode c.w. lasers at both 1312
and 1322 nm with outputs of up to 2 W. By intra-cavity frequency
doubling therewith, we have obtained 440 mW at 661 nm and 340 mW
at 656 nm. In addition, we have evaluated transition probabilites
using the Cowan codes, both to estimate two-photon excitation
rates and calculate the lifetime of the metastable level, hitherto obtained by comparison
with an analogous transition in Hg+.
Complete list of metadatas

https://pastel.archives-ouvertes.fr/tel-00005897
Contributor : Yann Louyer <>
Submitted on : Wednesday, April 14, 2004 - 6:22:14 PM
Last modification on : Wednesday, September 16, 2020 - 5:38:28 PM
Long-term archiving on: : Wednesday, September 12, 2012 - 3:25:19 PM

Identifiers

  • HAL Id : tel-00005897, version 1

Citation

Yann Louyer. Développement de sources lasers à l'état solide pour la réalisation d'une horloge optique basée sur l'atome d'argent. Physique Atomique [physics.atom-ph]. Conservatoire national des arts et metiers - CNAM, 2003. Français. ⟨tel-00005897⟩

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