Attenuation and scattering of light in optical fibers-effects of nuclear radiation (modulation and display of laser radiation). Final technical report 1 May 77-30 Apr 80

Technical Report · Tue Dec 01 04:00:00 EST 1981

OSTI ID:6794176

Mitra, S S

This study consists of measurements of effects of nuclear radiation on attenuation and pulse dispersion and light scattering in optical fibers. The radiation induced attenuation in a number of optical fibers was evaluated. Several different types of fibers were exposed to steady state nuclear radiation and the resulting decrease in transmitted power was monitored as a function of wavelength and radiation dose. The wavelengths examined were in the visible and near IR regions that are of specific interest for optical fiber communications. The fibers showed a decrease in transmitted power at all wavelengths examined. The radiation sensitivity in glass core fibers was observed to show dependence on factors such as impurity content and the index modifying dopants in the fiber. Experimental measurements of neutron radiation induced pulse dispersion changes, and attenuation changes in a 100 micron core step index fiber were made. In the course of irradiation pulse dispersion in the fiber was observed to decrease while the attenuation increased. Results indicate greater decreases in the transmission of higher order modes. This reflects the fact that the radiation response of a fiber is determined by the respective refractive indices and absorption coefficients of both the core and cladding of the fiber. Results are presented along with a discussion of mechanisms by which dispersion changes can occur in irradiated fibers.

• Research Organization: Rhode Island Univ., Kingston (USA). Dept. of Electrical Engineering
• OSTI ID: 6794176
• Report Number(s): AD-A-113174/7
• Country of Publication: United States
• Language: English

Related Subjects

440200* -- Radiation Effects on Instrument Components
Instruments
or Electronic Systems
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CLADDING
DEPOSITION
DISPERSION RELATIONS
DOPED MATERIALS
ELECTROMAGNETIC RADIATION
FIBER OPTICS
INFRARED RADIATION
LIGHT SCATTERING
MATERIALS
NEAR INFRARED RADIATION
OPTICAL PROPERTIES
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PHYSICAL RADIATION EFFECTS
PLASTICS
RADIATION EFFECTS
RADIATION PROTECTION
RADIATIONS
SCATTERING
SENSITIVITY
SHAPE
SPECTRA
SURFACE COATING
SYNTHETIC MATERIALS
VISIBLE SPECTRA