Abstract
The ionizing radiation response of fiber Bragg gratings (FBGs) as a function of grating fabrication parameters and fiber characteristics has been investigated in a number of studies. In the present work we analyze a particular aspect of the
problem, which was not considered up to now: the influence of the fiber coating on the radiation sensitivity of FBGs. The FBGs used in our study are draw tower gratings written before applying the coating in a fiber with a photosensitive
18 mol.% GeO2-doped core. We irradiated polyimide, acrylate and ormocer coated gratings as well as mechanically stripped ormocer coated FBGs using a Co60 radiation source up to a 40 kGy dose. This total dose level corresponds to a
near-Earth space radiation environment mission. We show that the coating type must be taken into account for correctly interpreting ionizing radiation effects on FBGs. Our analysis also shows that a properly designed coating can enhance or
decrease the grating radiation sensitivity. Therefore, the results are of interest for both dosymetry and space communication applications of the FBGs.
Details
Original language | English |
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Title of host publication | Optical Sensors 2008 |
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Place of Publication | Bellingham, WA, United States |
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Pages | 700309-700309 |
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Publication status | Published - Apr 2008 |
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Event | Optical Sensors 2008 - Strasbourg, France Duration: 7 Apr 2008 → 11 Apr 2008 |
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Name | SPIE Proceedings |
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Number | 7003 |
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Conference | Optical Sensors 2008 |
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Country | France |
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City | Strasbourg |
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Period | 2008-04-07 → 2008-04-11 |
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