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Superstrate index control of waveguide grating reflectivity

Record type: Article

Control of reflectivity of a relief grating in a high-index film overlaid on a monomode glass waveguide was achieved by adjustment of the superstrate refractive index with liquids. Weak gratings reflecting at 1531nm were inscribed by UV laser ablation. The grating reflectivity was measured as the ratio of the transmission outside the reflection band, at 1536 nm, to that at the Bragg wavelength. Reflectivity with an air superstrate was 0.3 dB for both polarizations. In the TE polarization the grating strength increased to 20.5dB after application of a liquid of index 1.45. In the TM polarization the strength increased to 27dB with a superstrate index of 1.50. Good agreement was found with a theoretical model based on beam propagation.

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Citation

Pissadakis, S., Zervas, M.N., Sager, D.A. and Wilkinson, J.S. (2002) Superstrate index control of waveguide grating reflectivity Optics Letters, 27, (5), pp. 327-329. (doi:10.1364/OL.27.000327).

More information

Published date: 2002
Keywords: diffraction theory, integrated optics, integrated optics devices, integrated optics materials, microstructure fabrication, thin films
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 13809
URI: http://eprints.soton.ac.uk/id/eprint/13809
ISSN: 0146-9592
PURE UUID: 8f30933d-b661-4245-ae1c-5a18a50cf83c
ORCID for J.S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

Catalogue record

Date deposited: 31 Dec 2004
Last modified: 17 Jul 2017 17:00

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Contributors

Author: S. Pissadakis
Author: M.N. Zervas
Author: D.A. Sager
Author: J.S. Wilkinson ORCID iD

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