Fabrication and demonstration of a pure silica-core waveguide utilizing a density-based index contrast

We report a novel approach for creating a dopant-free pure silica-core waveguide (PSCW) for chip-scale waveguides with the goal of reaching fiber-like losses on-chip. Stoichiometric silica films were used as both the cladding and core material for buried channel waveguides, with the required index c...

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Bibliographic Details
Published in2011 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference pp. 1 - 3
Main Authors John, D D, Bauters, J F, Nedy, J, Wenzao Li, Moreira, R, Barton, J S, Bowers, J E, Blumenthal, D J
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.03.2011
Subjects
(130.2755) Glass waveguides
(310.4925) Thin-Films: Other Properties
Optical fibers
Optical films
Optical variables control
Silicon compounds
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Summary:We report a novel approach for creating a dopant-free pure silica-core waveguide (PSCW) for chip-scale waveguides with the goal of reaching fiber-like losses on-chip. Stoichiometric silica films were used as both the cladding and core material for buried channel waveguides, with the required index contrast generated by a difference in physical density. The bulk densities of the thin-films were measured with X-Ray Reflectometry, and these density values were compared with the expected change in refractive index using the Lorentz-Lorenz (Clausius-Mosotti) relation. We found the difference in density of 5.29% to correspond with the difference in refractive index of 1.17%, and measured propagation losses of 2.119 to 2.660 dB/cm.
ISBN:9781457702136
1457702134