Title :
Sensitivity-enhanced optical temperature sensor with cascaded LPFGs
Author :
Tsutsumi, Yasuhiro ; Miyoshi, Yuji ; Ohashi, Masaharu
Author_Institution :
Osaka Prefecture Univ., Sakai, Japan
Abstract :
We propose a new structure of optical fiber temperature sensor with cascaded long-period fiber gratings (LPFGs) and investigate the temperature dependent loss of cascaded LFPGs. Each of the cascaded LPFGs has the same resonance wavelength with the same temperature change, because the cascaded LPFGs are made of a heat-shrinkable tube and a screw. The total resonance loss of proposed cascaded LPFGs shows higher temperature sensitivity than that of a single LPFG. The thermal coefficient of 4-cascaded LPFG also shows more than 4 times larger than that of a single one.
Keywords :
Bragg gratings; fibre optic sensors; optical fibre losses; temperature sensors; cascaded LPFG; cascaded long-period fiber gratings; heat-shrinkable tube; optical fiber temperature sensor; resonance wavelength; sensitivity-enhanced optical temperature sensor; temperature dependent loss; temperature sensitivity; thermal coefficient; Abstracts; Fasteners; Heating; Optical losses; Optical sensors; Temperature measurement; LPFG insertion loss; cascaded LPFGs; heat-shrinkable tube; mechanical LPFG; temperature sensor;
Conference_Titel :
Communications and Photonics Conference and Exhibition, 2011. ACP. Asia
Conference_Location :
Shanghai
Print_ISBN :
978-0-8194-8961-6
