Abstract

A number of techniques for measuring multimode fiber acceptance angle are described, and the general requirements and problems particular to each technique are discussed. An experimental comparison is presented of a fiber acceptance-angle technique and a fiber radiation-angle technique. Results are presented on quasi-step index and also plastic-clad silica fibers. It is concluded that the radiation-angle technique offers simplicity of operation with unambiguous results and may, therefore, be a suitable standard method for testing optical fibers.

© 1982 Optical Society of America

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