Abstract

An experimental configuration has been developed and examined for transmitting spectral information through an optical fiber placed in contact with the specimen of interest in shock compression experiments. The experimental results obtained for silica and sapphire fibers in the stress range of 33–91 kbar demonstrate that shocked optical fiber can transmit light without loss or spectral variation for the duration of a typical shock experiment (≈1 μs) if some lateral confinement is provided. In general, it is preferable to confine the fiber laterally with a disk of the same material to ensure a condition of uniaxial strain in the fiber. In the one case of fused silica fiber confined in a polymethylmethacrylate disk that we examined, satisfactory fiber performance was observed. Results of a 2-D wave propagation calculation to examine this experiment are presented. The present results demonstrate the feasibility of using optical fiber as a component in remote optical sensors for shock experiments.

© 1986 Optical Society of America

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