Neutron Radiation Effects in Fiber Optics.
Final rept. 1979-1980,
NAVAL ACADEMY ANNAPOLIS MD
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The damage produced in optical fibers by fast neutrons has been studied with reference to the recovery of the fibers tested. The fibers were subjected to varying doses of neutrons. Individual wavelengths were monitored during the irradiation and post-irradiation recovery processes. Recovery rates for each particular wavelength were studied to determine the bleaching effect of the monitoring light at that wavelength. The wavelength was varied over the lower operating range of the fibers, 700 to 950 nm in increments of 50 nm. Further measurements were taken to determine the bleaching effect of ultraviolet light. Theory suggests that damage caused by high energy neutrons, known to create absorption bands in the ultraviolet range, should show bleaching effects when high intensity ultraviolet light is transmitted through the fiber. Neutral density filters were utilized to determine the dependence of recovery on the intensity of ultraviolet light used. The bleaching effect of a white light source was also studied. Here again, it is believed that the input of high intensity light should be able to bleach out any defects which may have been created by the neutron irradiation. Author
- Radioactivity, Radioactive Wastes and Fission Products
- Fiber Optics and Integrated Optics