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Reekie, L.
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Publications (4/4 displayed)
- 2004UV inscription of sub-micron periodic structures in "hard" optical materials and waveguides
- 2001Gratings in indium oxide film overlayers on ion-exchanged waveguides by excimer laser micromachiningcitations
- 2000Bragg gratings in ternary SiO2 SnO2 Na2O optical glass fiberscitations
- 2000Relief gratings on Er/Yb-doped borosilicate glasses and waveguides by excimer laser ablationcitations
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article
Bragg gratings in ternary SiO2 SnO2 Na2O optical glass fibers
Abstract
Bragg gratings have been written in an optical fibre with a core made of ternary SiO2:SnO2:Na2O glass and a SiO2 cladding. The presence of Na2O allows for higher concentrations of SnO2 which is believed to be responsible for the photorefractive response of this composition. In these preliminary experiments significant refractive index modulations, up to 6.2x10-4, have been achieved using a 248nm excimer laser and a phase mask to write gratings for reflectivity at around 1.5µm. The induced refractive index changes show enhanced temperature stability and there is no sign of any erasure up to temperatures exceeding 600°C.