Silica-based sol-gel films doped with active elements

Almeida, Rui M.; Orignac, Xavier; Barbier, D.

doi:10.1007/bf00486292

Cited by 20 publications

(15 citation statements)

References 6 publications

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“…1, 2 Increasing the rare-earth concentration is a key point in order to make short and compact optical amplifiers but high doping levels of rare-earth quench the fluorescent emission and reduce the performance of the amplifier. Rare-earth doped lasers and amplifiers are some of its basic components, and, for cost and space reduction, they need to be integrated.…”

Section: ͓S0003-6951͑96͒03633-9͔mentioning

confidence: 99%

Fabrication and characterization of sol-gel planar waveguides doped with rare-earth ions

Orignac¹,

Barbier²,

et al. 1996

Applied Physics Letters

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103

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Section: ͓S0003-6951͑96͒03633-9͔mentioning

confidence: 99%

Fabrication and characterization of sol-gel planar waveguides doped with rare-earth ions

Orignac¹,

Barbier²,

et al. 1996

Applied Physics Letters

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103

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“…These optically active glasses were fabricated for the purpose of producing a high-power laser material having a large amount of lasing ions. [7][8][9][10][11] In this letter, we present preliminary results on the fabrication of silica films heavily doped with Er 3ϩ ions using the sol-gel technique. To incorporate a large amount of Er 3ϩ in the silica glass without clustering, we employed an Er 3ϩ -Al 3ϩ double alkoxide precursor along with silicon alkoxide for the sol-gel synthesis.…”

Section: Department Of Electrical and Computer Engineering And Departmentioning

confidence: 99%

Fabrication of highly concentrated Er3+ doped aluminosilicate films via sol-gel processing

Ryu

Choi

Kim

1995

Applied Physics Letters

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Optically active highly concentrated Er3+–Al3+ codoped silica thin films were fabricated on fused silica substrates by sol-gel method. The synthesis of the Er3+–Al3+ double alkoxide was intended to prevent the optically harmful Er clustering by the selective coordination of Al3+ around Er3+ ions. The molar Er ion concentration was varied from 3811 to 23719 ppm. Photoluminescence (PL) measurements indicated that Er ions were optically active in all films of different Er concentrations. A broadband peak was observed at 1531 nm with the full width at half-maximum (FWHM) of 42 nm, which corresponds to the 4I13/2→4I15/2 transition. The shape, peak position, and FWHM of the PL signals from the sol-gel derived Er3+ doped silica were quite comparable to those prepared by other methods. The PL peak showed maximum intensity at an Er concentration of 8535 ppm. This implies the concentration quenching at higher Er concentrations.

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“…We have shown previously [1], that we were able to produce neodymium (Nd) doped planar waveguides by sol-gel route. Which means that sol-gel can be used as a technology for integrated optics, even for active components.…”

Section: Introductionmentioning

confidence: 97%

Improved composition for sol-gel rare-earth doped planar waveguides

Barbier¹,

Orignac

et al. 1997

J Sol-Gel Sci Technol

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Abstract.A multilayer sol-gel process has been developed in order to make highly doped rare-earth planar waveguides on silica or silicon substrates.Starting with a small range of constituents, such as SiO2, TiO2, PEO5 and A1203, we show that a large variety of gel compositions, with different spectroscopic behaviour, can be made when doped with rare-earths.We have doped the sol-gel films with neodymium and we have optimized their compositions by measuring the neodymium fluorescence lifetime. For a composition with 10 atom% of phosphorous, the lifetime evolution with neodymium concentration was studied and a quenching concentration was found at 1% of neodymium. We have also shown the strong influence of phosphorous or aluminium in the sol composition on the fluorescence lifetime, for a given neodymium concentration. First results on similar planar waveguides, doped with erbium, are also presented.The stability of the fluorescence lifetime over a long period of time is an other important point to be checked for these new materials: the lifetime evolution over a 9 months measurement period is presented.Keywords: sol-gel, neodymium and erbium doped planar waveguide, fluorescence lifetime measurement, phosphorous and aluminium codoping

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Silica-based sol-gel films doped with active elements

Cited by 20 publications

References 6 publications

Fabrication and characterization of sol-gel planar waveguides doped with rare-earth ions

Fabrication and characterization of sol-gel planar waveguides doped with rare-earth ions

Fabrication of highly concentrated Er3+ doped aluminosilicate films via sol-gel processing

Improved composition for sol-gel rare-earth doped planar waveguides

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