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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Veröffentlicht in:	IEEE photonics technology letters 2011-07, Vol.23 (13), p.920-922
Hauptverfasser:	Zu, Peng, Chan, Chi Chiu, Jin, Yongxing, Gong, Tianxun, Zhang, Yifan, Chen, Li Han, Dong, Xinyong
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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