Photobleaching of radiation-induced color centers in a germania-doped glass fiber

Journal Article · Wed Dec 01 00:00:00 EST 1982 · IEEE Trans. Nucl. Sci.; (United States)

DOI:https://doi.org/10.1109/TNS.1982.4336391· OSTI ID:6093281

Gilbert, R M

Experiments have been performed to measure the effects of photobleaching on radiation-induced absorption in a Corning germania-doped graded-index fiber (type 1506) held at 77 K. Fiber segments 4.6 m long were exposed to radiation pulses of approximately 280 rads(Si) and 24-ns pulsewidth while suspended in a liquid nitrogen bath. Wavelength-dependent absorption measurements and photobleaching were also carried out on the fiber in situ. The measurements showed a broad radiation-induced absorption band peaking between 5000 and 6000. It was partially photobleached with light in the wavelength range of 6556 to 9556, and was almost entirely photobleached with light at 4556 and 5556 wavelengths. This absorption band was readily removed with a room-temperature thermal anneal and is thus identified as the source of transient darkening in germania-doped fibers irradiated at higher temperatures.

• Research Organization: Harry Diamond Labs., Adelphi, MD 20783
• OSTI ID: 6093281
• Journal Information: IEEE Trans. Nucl. Sci.; (United States), Vol. 29:6
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COLOR CENTERS
BLEACHING
GLASS
DOPED MATERIALS
ABSORPTION
ANNEALING
FIBERS
LOW TEMPERATURE
NITROGEN
PULSES
RADIATION EFFECTS
TRANSIENTS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ELEMENTS
HEAT TREATMENTS
MATERIALS
NONMETALS
POINT DEFECTS
VACANCIES
440200* - Radiation Effects on Instrument Components
Instruments
or Electronic Systems