Various measurements have been made on step index fibers having pure silica cores which are expected to have good radiation hardness properties. These measurements include spectral attenuation, numerical aperture, and bandwidth. Values for the preceeding quantities are given for several step index fibers of various diameters including the following: plastic -clad silica (PCS), QSF -AS, Raychem VSC, Dainichi Diaguide, and Ensign -Bickford fiber.Computer -controlled instrumentation was developed for these measurements and is described.
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