Role of mobile hydrogen on relaxation processes in Ge-doped optical fibers. - Université Jean-Monnet-Saint-Étienne Access content directly
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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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Dates and versions

ujm-00117497 , version 1 (02-12-2006)

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  • HAL Id : ujm-00117497 , version 1

Cite

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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