Photo-Induced Self-Condensation, A Technique For Fabricating Organic Lightguide Structures

H. Franke; W. Heuer

doi:10.1117/12.938139

3 November 1986 Photo-Induced Self-Condensation, A Technique For Fabricating Organic Lightguide Structures

H. Franke, W. Heuer

Proceedings Volume 0651, Integrated Optical Circuit Engineering III; (1986) https://doi.org/10.1117/12.938139
Event: 1986 International Symposium/Innsbruck, 1986, Innsbruck, Austria

Abstract

Planar lightguides have been fabricated from mixtures of the polymer PMMA with benzoin type photoinitiators. Using conventional UV-photolithography 2 dimensional refractive index patterns were recorded in the polymer films. Thickness and refractive index of the organic lightguides were determined by m-line spectroscopy. The achieved refractive index changes increased with increasing photoinitiator concentrations. For high concentrations (< 70 %) the film refractive index could be increased via UV exposure by Δn = 0.03. Thermal treatment at below 100°C caused the out diffusion of the unexposed photoinitiator and completion of the photochemically induced reaction in the exposed parts of the film. Thus refractive index patterns (Δn < 0.05) could be developed and fixed.

Citation Download Citation

H. Franke and W. Heuer "Photo-Induced Self-Condensation, A Technique For Fabricating Organic Lightguide Structures", Proc. SPIE 0651, Integrated Optical Circuit Engineering III, (3 November 1986); https://doi.org/10.1117/12.938139

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