Silica aerogel core waveguide
Grogan, M. D. W., Leon-Saval, S. G., England, R. and Birks, T., 2010. Silica aerogel core waveguide. Optics Express, 18 (21), pp. 22497-22502.
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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.
|Creators||Grogan, M. D. W., Leon-Saval, S. G., England, R. and Birks, T.|
|Departments||Faculty of Engineering & Design > Chemical Engineering|
Faculty of Science > Physics
|Publisher Statement||Birks_OE_2010_18_21_22497.pdf: © 2010 The Optical Society. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?URI=oe-18-21-22497. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.|
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