Skip to Main content Skip to Navigation
Theses

Verres de sulfures: spectroscopie des ions de terres-rares, fibres microstructurées et nouvelles compositions

Abstract : Using originals materials, with high linear and non-linear indices of refraction and with low phonon energies, as sulfide glasses, allows new perspectives for telecommunication applications, such as large-band amplification (1.3-1.5 µm), all-optical switching and signal regeneration. In this report, we have studied optical fibres and glasses transmitting in the infrared range. The optical window of glasses based on GeGaS system, has been extended to the visible region, thanks to the addition of metal and earth-alkali chlorides. Physical properties (density, glass transition temperature, thermal expansion, micro-hardness, optical transmission, refractive index) and structural organization were studied in order to highlight the impact of chloride addition in sulfide glasses. Rare-earth-doped GeGaSbS sulfide glasses possess the potential for optical amplification in the 1.3 - 1.47 µm spectral region. The energy gap law, linking multiphonon relaxation rate to energy gap between an excited level and its next lower level, was established in GeGaSbS glasses. Energy-level diagram of Yb3+ ion in various sulfide and halogeno-sulfide glasses was established by studies of spectroscopic properties of this ion, in order to choose the best host for laser optical cooling. Drawing of single-mode fibres was investigated for GeGaSbS glasses. A single-mode sulfide fiber of numerical aperture of 0.44 has been prepared and has shown a mode diameter of 2 µm at 1.55 µm. Infrared fluorescence of Dy3+ and Tm3+ on multimode fiber was studied too. Microstructured fibers have been realized with GeGaSbS-sulfide-glasses which can be easily shaped and drawn. Holey fiber, quasi single-mode at 1.55 µm, was demonstrated.
Document type :
Theses
Complete list of metadatas

Cited literature [112 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00009279
Contributor : Jenny Le Person <>
Submitted on : Wednesday, May 18, 2005 - 10:56:42 AM
Last modification on : Friday, February 26, 2021 - 2:07:18 PM
Long-term archiving on: : Friday, September 14, 2012 - 1:10:25 PM

Identifiers

  • HAL Id : tel-00009279, version 1

Citation

Jenny Le Person. Verres de sulfures: spectroscopie des ions de terres-rares, fibres microstructurées et nouvelles compositions. Matériaux. Université Rennes 1, 2004. Français. ⟨tel-00009279⟩

Share

Metrics

Record views

384

Files downloads

2545