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Article Dans Une Revue Laser Physics Letters Année : 2016

Nanostructuring an erbium local environment inside sol–gel silica glasses: toward efficient erbium optical fiber lasers

Résumé

To extend the use of erbium- (Er-)/aluminum- (Al-) codoped optical fibers in hostile environments, the reduction of the Al amount has been identified as a serious way to harden them against harsh radiation. In this work, sol–gel monolithic Er3+-doped and Er3+/Al3+-codoped silica glasses were prepared from nanoporous silica xerogels soaked in a solution containing an Er salt together or not with an Al salt. After sintering, these glasses were used as the core material of microstructured optical fibers made by the stack-and-draw method. The influence of Al incorporation on the optical properties of Er3+-doped silica glasses and fibers is investigated. This approach enabled the preparation of silica glasses containing dispersed Er3+ ions with low Al content. The obtained fibers have been tested in an all-fibered cavity laser architecture. The Er3+/Al3+-codoped fiber laser presents a maximum efficiency of 27% at 1530 nm. We show that without Al doping, the laser exhibits lower performances that depend on Er content inside the doped fiber core. The effect of Er pair-induced quenching also has been investigated through nonsaturable absorption experiments, which clearly indicate that the fraction of Er ion pairs is significantly reduced in the Al-codoped fiber.
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Dates et versions

hal-01254030 , version 1 (11-01-2016)

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Inna Savelii, Hicham El Hamzaoui, Laurent Bigot, Géraud Bouwmans, Ihsan Fsaifes, et al.. Nanostructuring an erbium local environment inside sol–gel silica glasses: toward efficient erbium optical fiber lasers. Laser Physics Letters, 2016, 13 (2), pp.025108. ⟨10.1088/1612-2011/13/2/025108⟩. ⟨hal-01254030⟩
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