Silica aerogel core waveguide

Michael D W Grogan, S G Leon-Saval, Richard England, Timothy Birks

Research output: Contribution to journalArticle

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128 Downloads (Pure)

Abstract

We have selectively filled the core of hollow photonic crystal fibre with silica aerogel. Light is guided in the aerogel core, with a measured attenuation of 0.2 dB/cm at 1540 nm comparable to that of bulk aerogel. The structure guides light by different mechanisms depending on the wavelength. At long wavelengths the effective index of the microstructured cladding is below the aerogel index of 1.045 and guidance is by total internal reflection. At short wavelengths, where the effective cladding index exceeds 1.045, a photonic bandgap can guide the light instead. There is a small region of crossover, where both index-and bandgap-guided modes were simultaneously observed.
Original languageEnglish
Pages (from-to)22497-22502
Number of pages6
JournalOptics Express
Volume18
Issue number21
DOIs
Publication statusPublished - 2010

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    Grogan, M. D. W., Leon-Saval, S. G., England, R., & Birks, T. (2010). Silica aerogel core waveguide. Optics Express, 18(21), 22497-22502. https://doi.org/10.1364/OE.18.022497