Photosensitive properties of a tin-doped sodium silicate glass for direct ultraviolet writing

Milanese, Daniel; Ferraris, Monica; Menke, Yvonne; Olivero, Massimo; Perrone, Guido; Gawith, Corin B.E.; Brambilla, Gilberto; Smith, Peter G.R.; Taylor, Elizabeth R.
April 2004
Applied Physics Letters;4/26/2004, Vol. 84 Issue 17, p3259
Academic Journal
In this letter, the fabrication of channel waveguides by direct UV writing into a bulk tin-doped multicomponent silicate glass is presented. Different laser powers and scan rates were employed and optimized to avoid surface ablation. The best results were obtained at a laser power of 95 mW and at a scan speed of 10 mm/min, where a refractive index change of 1.5×10-3 was estimated and an attenuation loss of 3.3 dB/cm was measured using the cutback method. A morphological investigation of the glass end facets was performed in order to assess the surface effect of the laser exposure. © 2004 American Institute of Physics.


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