Angularly Cascaded Long-Period Fiber Grating for Curvature and Temperature Detection
Anping Xiao,
Jie Du,
Qiang Ling,
Yao Chen,
Zhengtian Gu,
Haiyun Chen,
Zhangwei Yu,
Barerem-Melgueba Mao,
Zuguang Guan,
Daru Chen
Affiliations
Anping Xiao
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, China
Jie Du
Laboratory of Photo-Electric Functional Films, College of Science, University of Shanghai for Science and Technology, 516 Jun Gong Road, Shanghai 200093, China
Qiang Ling
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, China
Yao Chen
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, China
Zhengtian Gu
Laboratory of Photo-Electric Functional Films, College of Science, University of Shanghai for Science and Technology, 516 Jun Gong Road, Shanghai 200093, China
Haiyun Chen
Key Laboratory of Optical Information Detection and Display Technology of Zhejiang, Zhejiang Normal University, Jinhua 321004, China
Zhangwei Yu
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, China
Barerem-Melgueba Mao
Centre Informatique et de Calcul, Universite de Lome, Lome BP 1515, Togo
Zuguang Guan
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, China
Daru Chen
Hangzhou Institute of Advanced Studies, Zhejiang Normal University, 1108 Geng Wen Road, Hangzhou 311231, China
A high-sensitivity curvature sensor with dual-parameter measurement ability based on angularly cascaded long-period fiber grating (AC-LPFG) is proposed and experimentally demonstrated, which consists of two titled LPFGs (TLPFGs) with different tilt angles and the same grating period. AC-LPFG was fabricated by using a deep ultraviolet laser and an amplitude-mask in our laboratory. The experimental results show that simultaneous measurement of curvature and temperature can be achieved by monitoring the wavelengths of two resonant peaks for different TLPFGs. The two peaks show opposite shifts with increasing curvature and has a maximum curvature sensitivity of 16.392 nm/m−1. With the advantages of low cost, high sensitivity, and dual-parameter measurements, our sensor has more potential for engineering applications.
