Title :
Gamma radiation effect on the fiber Fabry-Perot interference sensor
Author :
Lai, Cheng-Chih ; Lee, Wei-Yu ; Wang, Way-Seen
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
The variation of thermo-optic coefficient caused by gamma irradiation is investigated for the fiber Fabry-Perot interference (FFPI) sensor. The sensor is formed by fusing fibers with different core diameters, and its thermo-optic coefficient is measured during irradiation up to doses higher than 1 MGy. The method used to measure the thermo-optic coefficient shows excellent agreement with Sellmeier equation with a difference of only 0.2%. Experiments show that the relative change of thermo-optic coefficient increases only by 2.1% and saturates at a total dose of 300 kGy, which suggests that the fiber FFPI sensor is suitable for use in harsh gamma radiation environments.
Keywords :
Fabry-Perot interferometers; fibre optic sensors; gamma-ray effects; temperature measurement; thermo-optical devices; thermo-optical effects; 300 kGy; Sellmeier equation; core diameters; fiber Fabry-Perot interference sensor; fusing fibers; gamma radiation effect; harsh gamma radiation environments; optical fiber temperature sensors; thermo-optic coefficient; total dose; Fabry-Perot; Fiber lasers; Gamma ray detectors; Gamma rays; Interference; Optical fiber sensors; Optical refraction; Sensor phenomena and characterization; Temperature sensors; Thermal sensors;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.815358
