Behavior of Bragg gratings, written in germanosilicate fibers, against γ-ray exposure at low dose rate

Bragg gratings have been written within four germanosilicate fibers either by a pulsed or by a continuous-wave exposure of each fiber to a coherent UV two-beam interference pattern. These gratings have been exposed under steady state conditions to gamma-ray doses as high as 10 (4) Grays. The dose ra...

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Bibliographic Details
Published in:IEEE photonics technology letters 1994-11, Vol.6 (11), p.1350-1352
Main Authors: NIAY, P, BERNAGE, P, CETIER, P, DOUAY, M, FERTEIN, E, LAHOREAU, F, BAYON, J. F, GEORGES, T, MONERIE, M, FERDINAND, P, ROUGEAULT, S
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
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Summary:Bragg gratings have been written within four germanosilicate fibers either by a pulsed or by a continuous-wave exposure of each fiber to a coherent UV two-beam interference pattern. These gratings have been exposed under steady state conditions to gamma-ray doses as high as 10 (4) Grays. The dose rates ranged between 10 Gy/h and 1.3x10(2) Gy/h. The transmission spectra of the fibers have been recorded during and after the (60)Co irradiation, near the grating Bragg wavelengths. Whereas the induced loss reached 600 dB/km near 1.3 mum, no significant change in the spectral characteristics of the gratings could be detected within the experimental accuracy, enabling their future use in a nuclear environment
ISSN:1041-1135
1941-0174
DOI:10.1109/68.334836