Title :
Hybrid sol-gel channel waveguide patterning using photoinitiator-free materials
Author :
Moreira, P.J. ; Marques, P.V.S. ; Leite, A.P.
Author_Institution :
Dept. de Fisica, Univ. do Porto, Portugal
Abstract :
Fabrication of organic-inorganic sol-gel glass channel waveguides by ultraviolet (UV) photopolymerization of material synthesized from the precursor methacryloxypropyltrimethoxysilane is performed using a pulsed 248-nm excimer laser without the need of photoinitiators. The transmission spectra of channel waveguides are presented. Absorption bands are identified, revealing high loss (4-5 dB/cm) at 1.55 μm mainly due to strong OH group content and an acceptable value of 0.4 dB/cm at 1.3 μm. Heat treatment and UV irradiation showed similar effects on the transmission spectra of channel waveguides, revealing no loss improvement in the 1.55-μm region.
Keywords :
heat treatment; infrared spectra; integrated optics; laser materials processing; optical fabrication; optical glass; optical losses; optical polymers; optical waveguides; organic-inorganic hybrid materials; polymerisation; sol-gel processing; ultraviolet lithography; visible spectra; 1.3 mum; 1.55 mum; 248 nm; UV irradiation; absorption bands; heat treatment; methacryloxypropyltrimethoxysilane; optical loss; organic-inorganic sol-gel glass channel waveguide patterning; transmission spectra; ultraviolet photopolymerization; Ethanol; Glass; Optical losses; Optical materials; Optical pulses; Optical waveguides; Organic materials; Solvents; Temperature; Waveguide lasers; Integrated optics; optical losses; optical materials; sol-gel process; waveguides;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.839775
