Role of mobile hydrogen on relaxation processes in Ge-doped optical fibers.

Abstract : Temperature dependencies of steady-state and time-resolved photoluminescence (PL) from triplet state at 3.1 eV and singlet state at 4.2 eV ascribed to the twofold-coordinated Ge have been measured in unloaded and H2-loaded Ge-doped silica samples under 5.0 eV excitation in the 10K to 310 K range. Experimental evidences indicate that diffusing molecular hydrogen (H2) depopulates by a collisional mechanism the triplet state, decreasing both its lifetime of about 14 % and the associated triplet PL intensity, whereas those of the singlet are insensitive to the presence of H2.
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https://hal-ujm.archives-ouvertes.fr/ujm-00117497
Contributor : Youcef Ouerdane <>
Submitted on : Saturday, December 2, 2006 - 9:46:46 AM
Last modification on : Wednesday, July 25, 2018 - 2:05:30 PM

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  • HAL Id : ujm-00117497, version 1

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Youcef Ouerdane, Aziz Boukenter, Kader Medjahdi, Fabrizio Messina, Marco Cannas. Role of mobile hydrogen on relaxation processes in Ge-doped optical fibers.. Mondello, Palermo. ⟨ujm-00117497⟩

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