Journal
APPLIED PHYSICS LETTERS
Volume 85, Issue 18, Pages 3962-3964Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1813627
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We have investigated optical properties of photosensitive polyimide appropriating for long self-written waveguide fabrication. From systematic measurements of absorption properties, it was found that photochemical reaction of photosensitizer dissolved in the photosensitive polyimide resins relates to transparency after the exposure, which limits the length of the fabricated self-written waveguide. By controlling the photochemical reaction, in which the photosensitive polyimide resin has sufficient transparency during exposure, four times longer self-written waveguide core was fabricated. (C) 2004 American Institute of Physics.
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