A Low-Cost High-Temperature Sensor Based on Long-Period Fiber/Microfiber Gratings by Local Fictive Temperature Modification. (11th June 2020)

• Record Type: Journal Article
• Authors: Zhou, Guorui; Zhang, Chuanchao; Xie, Xiufang; Wan, Yi; Yao, Caizhen; Liu, Jun; Niu, Longfei; Miao, Xinxiang; Zhou, Hai; Jiang, Xiaodong; Xu, Shizhen; Lv, Haibing
• Other Names: He Zhen Guest Editor.
• Is Part Of: Journal of chemistry. Volume 2020(2020)
• Publication Date: 2020-06-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2020/9076874
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : A high temperature-sensitive long-period fiber grating (LPFG) sensor fabricated by the local fictive temperature modification is proposed and demonstrated. High-frequency CO2 laser pulses scan standard single-mode fiber (SMF), and the modification zones extended to the core of SMF. Experimental results demonstrate that the LPFG temperature sensors with 600 μ m grating period and 32 period numbers offer the average sensitivity of 0.084 nm/C in the temperature range of room temperature (RM) to 875°C. The LPFGs fabricated here show exponential change in terms of the spectral wavelength shift versus changes in temperature. In addition, the maximum temperature sensitivity of 0.37 nm/C is achieved by employing long-period microfiber grating (LPMFG), fabricated by the microheater brushing technique and the local fictive temperature modification. LPMFG sensor exhibits better temperature characteristics due to a thinner diameter.