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UV written channel waveguides in ion-exchanged pyrex

Sheridan, A.K. and Gawith, C. and Emmerson, G. and Smith, P. and Wilkinson, J.S. (2003) UV written channel waveguides in ion-exchanged pyrex. In: European Conference on Integrated Optics, 2003-04-02 - 2003-04-04.

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In this paper we demonstrate that a positive change in refractive index can be induced by UV radiation in bulk Pyrex, an inexpensive, commercially available glass that is not specifically designed to be photosensitive. We describe the fabrication of channel waveguides in Pyrex by direct UV writing and show that a potassium-ion exchanged layer can be used to host single mode waveguides. The change in refractive index due to the UV writing is found to be 2x10−3.