Title :
A Temperature-Insensitive Twist Sensor by Using Low-Birefringence Photonic-Crystal-Fiber-Based Sagnac Interferometer
Author :
Zu, Peng ; Chan, Chi Chiu ; Jin, Yongxing ; Gong, Tianxun ; Zhang, Yifan ; Chen, Li Han ; Dong, Xinyong
Author_Institution :
Sch. of Chem. & Biomed. Eng., Nanyang Technol. Univ., Singapore, Singapore
fDate :
7/1/2011 12:00:00 AM
Abstract :
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 0.010 , respectively. The sensor is also insensitive to environmental temperature change with an ultralow thermal dependent coeffiecient of -0.5 pm/0C.
Keywords :
Sagnac interferometers; birefringence; fibre optic sensors; holey fibres; photonic crystals; Sagnac interferometer; dip wavelength; low-birefringence photonic crystal fiber; temperature-insensitive twist sensor; transmission spectrum; twist angle; Optical fiber couplers; Optical fiber polarization; Optical fiber sensors; Sagnac interferometers; Sensitivity; Temperature sensors; Birefringence; Sagnac interferometer; low-birefringence photonic crystal fiber; optical fiber twist sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2143400
