Picture of wind turbine against blue sky

Open Access research with a real impact...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

The Energy Systems Research Unit (ESRU) within Strathclyde's Department of Mechanical and Aerospace Engineering is producing Open Access research that can help society deploy and optimise renewable energy systems, such as wind turbine technology.

Explore wind turbine research in Strathprints

Explore all of Strathclyde's Open Access research content

Channel wAveguides in ion-exchanged pyrex by direct UV writing

Sheridan, A.K. and Gawith, C. and Emmerson, G. and Milton, J. and Smith, P. and Wilkinson, J.S. (2004) Channel wAveguides in ion-exchanged pyrex by direct UV writing. Optics Communications, 242 (1-3). pp. 109-114.

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

In this paper, we show that UV irradiation can induce a significant refractive index change in Pyrex, a commercial oxide glass which does not contain the most common photosensitiser, germanium. We describe the fabrication of channel waveguides in potassium-ion exchanged Pyrex by UV writing and find the maximum UV-induced change in refractive index to be 1 × 10−3. UV-induced changes in the absorption spectrum are reported and attributed to the formation of defects from iron impurities inherent in the glass. A colour-centre-related model for the observed refractive index change is proposed.