Fabrication and optical measurements of germanium-doped silica ridge waveguides using a colloidal suspension approach

Deok Yang Kim, Henry Du, Glen R. Kowach, Christopher A. White, David J. McGee

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Germanium-doped silica ridge waveguides for planar lightwave circuits were fabricated using colloidal suspensions. After consolidation at 1300 °C, fully dense micron-scale thick films were obtained. The refractive index of these films was tuned with germanium dopant up to 11.1 mol %. The propagation loss of a 3.1 mol % germanium-doped silica sample without an overcladding layer was 3.3±0.5 dBcm. Postannealing of the patterned waveguides at 1200 °C for 30 min was conducted in order to reflow waveguides, but it did not significantly smooth the sidewall roughness due to the high viscosity of the 3.1 mol % germanium-doped silica at that temperature.

Original languageEnglish
Article number121114
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number12
DOIs
StatePublished - 19 Sep 2005

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