Formation and conversion of defect centers in low water peak single mode optical fiber induced by gamma rays irradiation

Journal Article · Mon Feb 15 00:00:00 EST 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3273363· OSTI ID:21476154

Wen, J X; Luo, W Y; Xiao, Z Y; Wang, T Y; Chen, Z Y; Zeng, X L ^[1]

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1. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072 (China)

The formation and conversion processes of defect centers in low water peak single mode optical (LWPSM) fiber irradiated with gamma rays were investigated at room temperature using electron spin resonance. Germanium electron center (GEC) and self-trapped hole center (STH) occur when the fibers are irradiated with 1 and 5 kGy cumulative doses, respectively. With the increase in irradiation doses, the GEC defect centers disappear, and new defect centers such as E{sup '} centers (Si and Ge) and nonbridge oxygen hole centers (NBOHCs) generate. The generation of GEC and STH is attributed to the electron transfer, which is completely balanced. This is the main reason that radiation-induced attenuation (RIA) of the LWPSM fiber is only 10 dB/km at communication window. The new defect centers come from the conversion of GEC and STH to E{sup '} centers and NBOHC, and the conversion processes cause bond cleavage, which is the root cause that the RIA of the LWPSM fiber significantly increases up to 180 dB/km at working window. Furthermore, the concentration of new defect centers is saturated easily even by increasing cumulative doses.

• OSTI ID: 21476154
• Journal Information: Journal of Applied Physics, Vol. 107, Issue 4; Other Information: DOI: 10.1063/1.3273363; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATTENUATION
CHARGE EXCHANGE
CONVERSION
ELECTRON SPIN RESONANCE
ELECTRON TRANSFER
ELECTRONS
GAMMA RADIATION
GERMANIUM
HOLES
IRRADIATION
OPTICAL FIBERS
OPTICAL MODES
OXYGEN
PARAMAGNETISM
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
RADIATION DOSES
TRAPPING
WATER
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DOSES
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FIBERS
HYDROGEN COMPOUNDS
IONIZING RADIATIONS
LEPTONS
MAGNETIC RESONANCE
MAGNETISM
METALS
NONMETALS
OSCILLATION MODES
OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIATIONS
RESONANCE