Abstract

An apparatus for the measurement of attenuation of light in thin-film waveguides is described. It involves a prism that rides on a liquid film along the guide and couples the light out of the guide. A spatial resolution of ~0.5 mm and an accuracy of 0.02 dB/cm were achieved.

© 1973 Optical Society of America

Precision measurements of the optical attenuation profile along the propagation path in thin-film waveguides

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