Energy transfer up-conversion in Tm3+-doped silica fiber

Simpson, David A.; Baxter, Gregory W; Collins, Stephen F; Gibbs, W. E. K.; Blanc, Wilfried; Dussardier, Bernard; Monnom, Gérard

doi:10.1016/j.jnoncrysol.2005.11.019

Cited by 30 publications

(19 citation statements)

References 24 publications

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“…A first cause could be inter-ionic energy transfer during relaxation. Recently D. Simpson showed that the ( 3 F 4 => 3 H 4 : 3 F 4 => 3 H 6 ) energy transfer happens in silica fibres even at low Tm 3+ concentrations (~30 ppm) when the 3 F 4 level is resonantly excited [21]. However he showed that there was no energy transfer when the 3 H 4 level is resonantly excited, as we did for the present study.…”

Section: Effect Of Core Composition On Absorptionsupporting

confidence: 62%

Improvement of the Tm3+:3H4 level lifetime in silica optical fibers by lowering the local phonon energy

Faure

Blanc²,

Dussardier³

et al. 2007

Journal of Non-Crystalline Solids

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The role of some glass network modifiers on the quantum efficiency of the near-infrared fluorescence from the 3 H 4 level of Tm 3+ ion in silica-based doped fibers is studied. Modifications of the core composition affect the spectroscopic properties of Tm 3+ ion. Adding 17.4 mol% of AlO 3/2 to the core glass caused an increase of the 3 H 4 level lifetime up to 50 ls, 3.6 times higher than in pure silica glass. The quantum efficiency was increased from 2% to approximately 8%. On the opposite, 8 mol% of PO 5/2 in the core glass made the lifetime decrease down to 9 ls. These changes of Tm 3+ optical properties are assigned to the change of the local phonon energy to which they are submitted by modifiers located in the vicinity of the doping sites. Some qualitative predictions of the maximum achievable quantum efficiency are possible using a simple microscopic model to calculate the non-radiative de-excitation rates.

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Section: Effect Of Core Composition On Absorptionsupporting

confidence: 62%

Improvement of the Tm3+:3H4 level lifetime in silica optical fibers by lowering the local phonon energy

Faure

Blanc²,

Dussardier³

et al. 2007

Journal of Non-Crystalline Solids

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“…On the basis of analysis above, it is suggested that the emission from ODCs might be caused by multistep energy transfer from NBOHCs to ODCs, the schematic of which is shown in Fig. 3c, thus the possible upconversion mechanism for anti‐Stokes emission above is interpreted to be energy transfer 24–26.…”

Section: Resultsmentioning

confidence: 99%

Stokes and anti‐Stokes blue light emissions of thermal‐evaporated silica sub‐micron wires

Tao

Feng

et al. 2010

Physica Status Solidi (a)

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Based on the thermal evaporation of silicon monoxide at high temperature, an improved method has been developed for large‐scale synthesis of ultralong amorphous silica sub‐micron wires using polished p‐Si wafers as substrates. The synthesis was done with and without thermite. The morphology and structure of the silica wires was investigated through field‐emission scanning electron microscope equipped with energy dispersive X‐ray spectroscopy, and X‐ray diffractometer. Almost uniform sub‐micron wires with average diameters of 300 nm and length up to hundreds of micrometers were obtained in presence of thermite while sub‐micron wires with many curved segments were obtained in absence of the thermite. Both forms of silica wires emitted blue lights at 478 nm (∼2.6 eV) under excitation at 351 nm (∼3.5 eV), while intense anti‐Stokes blue emissions at 464 nm (∼2.7 eV) were observed under the 694 nm (∼1.8 eV) excitation due to the upconversion effect. This effect is associated with defect centers arising from high oxygen deficiency. The emissions from oxygen deficiency centers might be caused by multistep energy transfer from nonbridging oxygen hole centers to oxygen deficiency centers.

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“…The refractive index profiles of the fibre samples were used to obtain the A1203 concentrations. A1203 was used to modify the core region of the fibre, as it has been established that it has a lengthening effect on the fluorescence lifetimes of the 3H4 and 3F4 manifolds [5]. The A1203 is also helps to distribute the rare earth ions homogeneously throughout the glass host and provides the refractive index difference needed to guide light along the fibre.…”

Section: Methodsmentioning

confidence: 99%

Tm<sup>3+</sup>/Yb<sup>3+</sup> co-doped alumino-silicate fibre: potential for S-band optical amplification

Simpson

Gibbs

Baxter

et al. 2007

COIN-ACOFT 2007 - Joint International Conference on the Optical Internet and the 32nd Australian Conference on Optical Fibre Te

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Energy transfer up-conversion in Tm3+-doped silica fiber

Abstract: A study of the mechanisms responsible for the infra-red to near infra-red up-conversion in thulium doped silica fibres is presented.

Cited by 30 publications

References 24 publications

Improvement of the Tm3+:3H4 level lifetime in silica optical fibers by lowering the local phonon energy

Improvement of the Tm3+:3H4 level lifetime in silica optical fibers by lowering the local phonon energy

Stokes and anti‐Stokes blue light emissions of thermal‐evaporated silica sub‐micron wires

Tm<sup>3+</sup>/Yb<sup>3+</sup> co-doped alumino-silicate fibre: potential for S-band optical amplification

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