Title :
Strain Sensor Realized by Using Low-Birefringence Photonic-Crystal-Fiber-Based Sagnac Loop
Author :
Gong, Huaping ; Chan, Chi Chiu ; Chen, Lihan ; Dong, Xinyong
Author_Institution :
Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China
Abstract :
An optical fiber strain sensor by using a low-birefringence photonic crystal fiber (PCF)-based Sagnac loop is demonstrated. A fiber Sagnac loop is formed by the low-birefringence PCF of about 40 cm, and a section of about 140-mm PCF is used as the strain sensing element. The output spectra of Sagnac loop under different strain levels are measured and analyzed. The sensitivity of the strain measurement of -0.457 pm/με is achieved within the range of 0-2520 με. The temperature effect is also analyzed.
Keywords :
Sagnac interferometers; birefringence; fibre optic sensors; holey fibres; photonic crystals; strain sensors; low-birefringence photonic-crystal-fiber-based sagnac loop; optical fiber strain sensor; strain sensing element; Fiber Sagnac loop; optical fiber sensor; photonic crystal fiber (PCF); strain sensor;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2053025
