Abstract

The loss characteristics in multimode transmission were studied for hollow waveguides, and simple equations for optical power attenuation were derived. The equations that were derived by the electromagnetic wave theory and the geometrical optics theory coincide exactly. If the transmission loss is small, the optical power attenuates exponentially with the length of the waveguide. The transmission loss increases in proportion to the inverse of the bore radius and the square of the launch angle. The theoretical values that were calculated by the present equations were in good agreement with the data measured for the SiO2 and ZnSe-coated Ag hollow waveguides.

© 1993 Optical Society of America

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