Author Affiliations
Abstract
1 College of Science, Harbin Engineering University, Harbin 150001, China
2 Photonics Research Center, Guilin University of Electronics Technology, Guilin 541004, China
We propose and investigate a compact optical fiber sensor that aims to measure the torsion in both amount and direction with high sensitivity. This sensor is configured by a triangular-prism-shaped long-period fiber grating, which is fabricated by the high frequency laser polished method. The unique design of the triangular-shaped structure breaks the rotational symmetry of the optical fiber and provides high sensitivity for torsion measurement. In preliminary experiments, the torsion response of the sensor achieves a good stability and linearity. The torsion sensitivity is 0.54 nm/(rad/m), which renders the proposed structure a highly sensitive torsion sensor.
long-period fiber grating torsion sensor CO2 laser etched method Chinese Optics Letters
2021, 19(4): 041202
Author Affiliations
Abstract
1 Key Laboratory of in-Fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin, 150001, China
2 College of Science, Harbin Engineering University, Harbin, 150001, China
3 Postdoctoral Research Station of Mechanical Engineering, College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, 150001, China
We designed a novel core-suspended capillary fiber that the core was suspended in the air hole and close to the inner surface of the capillary, and experimentally demonstrated its fabrication technology. In addition, a method for linking a single mode fiber and a core-suspended fiber was proposed based on splicing and tapering at the fusion point between the two fibers. By combining with the optical time domain reflectometer technology, we constructed a distributed gas sensor system to monitor greenhouse gas based on this novel fiber.
Hollow fiber core-suspended linking distributed gas sensor Photonic Sensors
2014, 4(2): 97
