Loss mechanisms in polyimide waveguides

Waveguide losses in thin film polyimides using waveguide loss spectroscopy and photothermal deflection spectroscopy as a function of cure cycle and structure were studied. Fluorinated sidegroups on the polyimide backbone lead to decreases in birefringence and absorption. The primary waveguide loss m...

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Bibliographic Details
Published in:Journal of applied physics 1994-08, Vol.76 (4), p.2505-2508
Main Authors: Kowalczyk, T. C., Kosc, T., Singer, K. D., Cahill, P. A., Seager, C. H., Meinhardt, M. B., Beuhler, A. J., Wargowski, D. A.
Format: Article
Language:English
Subjects:
360606 - Other Materials- Physical Properties- (1992-)
661300 - Other Aspects of Physical Science- (1992-)
ABSORPTION SPECTRA
BIREFRINGENCE
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
ENERGY LOSSES
LOSSES
MATERIALS SCIENCE
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POLYMERS
REFRACTION
SPECTRA
THIN FILMS
WAVEGUIDES
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Summary:Waveguide losses in thin film polyimides using waveguide loss spectroscopy and photothermal deflection spectroscopy as a function of cure cycle and structure were studied. Fluorinated sidegroups on the polyimide backbone lead to decreases in birefringence and absorption. The primary waveguide loss mechanism is absorption, not scattering. Waveguide losses as low as 0.4 dB/cm at 800 nm have been measured. Losses as low as 0.3 dB/cm at 1300 nm can be inferred from the photothermal deflection spectroscopy.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.357610