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18 May 2011 Multi long-period gratings in a fiber carved and written by using a CO2 laser for distributed sensing
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Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 77539I (2011) https://doi.org/10.1117/12.886013
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada
Abstract
A multi long-period grating (multi-LPG) sensor has been proposed for distributed sensing. To fabricate the multi-LPG sensor, a carved LPG has also been proposed for easy fabrication of the multi-LPGs with different resonant wavelengths in a similar loss spectrum. The 2-LPG sensor was fabricated in a fiber successfully, containing carved and uncarved LPGs. The resonant wavelength shift was 64 nm by the carving. The temperature dependence of the resonant wavelength was 0.11 nm/deg, and the temperature distributed sensing was demonstrated to be possible by the 2-LPG sensor.
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Yutaka Katsuyama, Yutaka Tokunaga, Saburo Kasahara, Ryou Sougen, Osanori Koyama, and Makoto Yamada "Multi long-period gratings in a fiber carved and written by using a CO2 laser for distributed sensing", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 77539I (18 May 2011); https://doi.org/10.1117/12.886013
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