Dynamics of infrared absorption caused by hydroxyl groups and its effect on refractive index evolution in ultraviolet exposed hydrogen loaded GeO2-doped fibers
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作者:
Araujo, FM
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机构:INESC, Unidade Optoelect, P-4150 Porto, Portugal
Araujo, FM
Joanni, E
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机构:INESC, Unidade Optoelect, P-4150 Porto, Portugal
Joanni, E
Marques, MB
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机构:INESC, Unidade Optoelect, P-4150 Porto, Portugal
Marques, MB
Okhotnikov, OG
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机构:INESC, Unidade Optoelect, P-4150 Porto, Portugal
Okhotnikov, OG
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[1] INESC, Unidade Optoelect, P-4150 Porto, Portugal
The growth dynamics of UV induced IR absorption and related refractive index change in hydrogen loaded GeO2-doped fibers have been studied. We report a higher initial rate and strong saturation for Ge-OH generation compared with Si-OH formation under UV exposure. A close correlation was found between the Ge/Si-OH groups concentration and the induced index change as a function of the UV exposure time. (C) 1998 American Institute of Physics.