A Temperature-Insensitive Twist Sensor by Using Low-Birefringence Photonic-Crystal-Fiber-Based Sagnac Interferometer

An optical fiber twist sensor is proposed by using solid core low birefringence photonic crystal fiber (LB-PCF)-based Sagnac interferometer. The twist effects on the fiber are theoretically analyzed. The results show that the dip wavelength of the transmission spectrum shifts with the twist angle wi...

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Bibliographic Details
Published in:IEEE photonics technology letters 2011-07, Vol.23 (13), p.920-922
Main Authors: Zu, Peng, Chan, Chi Chiu, Jin, Yongxing, Gong, Tianxun, Zhang, Yifan, Chen, Li Han, Dong, Xinyong
Format: Article
Language:English
Subjects:
Birefringence
low-birefringence photonic crystal fiber
Optical fiber couplers
Optical fiber polarization
Optical fiber sensors
optical fiber twist sensor
Sagnac interferometer
Sagnac interferometers
Sensitivity
Temperature sensors
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Summary:An optical fiber twist sensor is proposed by using solid core low birefringence photonic crystal fiber (LB-PCF)-based Sagnac interferometer. The twist effects on the fiber are theoretically analyzed. The results show that the dip wavelength of the transmission spectrum shifts with the twist angle with a high sensitivity and resolution of 1.00 nm/ 0 and 0.01 0 , respectively. The sensor is also insensitive to environmental temperature change with an ultralow thermal dependent coeffiecient of -0.5 pm/ 0 C.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2011.2143400