Helical sensor for simultaneous measurement of torsion and temperature

Lu, Chupeng; Zeng, Fei; Rui, Zeju; Xiang, Zihang; Geng, Tao; Sun, Cuiting; Yuan, Libo

doi:10.1016/j.optlastec.2022.108934

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…Our sensor has a larger measurement range and higher sensitivity than those in Refs. [ 4 , 5 ]. Compared with the double helix of LPFGs in Refs.…”

Section: Resultsmentioning

confidence: 99%

“…We primarily compared the twist range, twist sensitivity, and fabrication of various sensors. Our sensor has a larger measurement range and higher sensitivity than those in Ref [4] and [5]. Compared with the double helix of LPFGs in Ref [6] and [7], our sensor has the advantage of ease o fabrication and low cost.…”

Section: Twist Sensormentioning

confidence: 98%

“…Therefore, optical fiber sensors for temperature and twist have been widely studied due to their unique advantages, such as high sensitivity, strong anti-electromagnetic interference, low cost, minor size, remote sensing, and high flexibility [ 1 , 2 , 3 ]. In recent years, optical fiber sensors for temperature and twist have been widely reported based on LPFGs [ 4 , 5 , 6 , 7 , 8 ], the Mach–Zehnder interferometer (MZI) [ 9 , 10 , 11 ], and Sagnac interference (SI) [ 12 , 13 , 14 ]. For instance, Lu et al proposed a helical sensor based on LPFG to measure temperature and twist [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, optical fiber sensors for temperature and twist have been widely reported based on LPFGs [4][5][6][7][8], the Mach-Zehnder interferometer (MZI) [9][10][11], and Sagnac interference (SI) [12][13][14]. For instance, Lu et al proposed a helical sensor based on LPFG to measure temperature and twist [4]. The highest sensitivity of twist was −0.654 nm/(rad/m) in the range of −12.6~12.6 rad/m, and the sensitivity of temperature was 66.8 pm/ • C from 30 to 150 • C. Zhang et al fabricated a novel LPFG formed by tilted-arc grids (TA-LPFG) in normal simple-mode fiber [5].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Temperature and Twist Sensor Based on the Sagnac Interferometer with Long-Period Grating in Polarization-Maintaining Fiber

Zhang,

Zheng,

Zhu

et al. 2024

Sensors

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We utilized a CO2 laser to carve long-period fiber gratings (LPFGs) on polarization-maintaining fibers (PMFs) along the fast and slow axes. Based on the spectra of LPFGs written along two different directions, we found that when LPFG was written along the fast axis, the spectrum had lower insertion loss and fewer side lobes. We investigated the temperature and twist characteristics of the embedded structure of the LPFG and Sagnac loop and ultimately obtained a temperature sensitivity of −0.295 nm/°C and a twist sensitivity of 0.87 nm/(rad/m) for the LPFG. Compared to the single LPFG, the embedded structure of the LPFG and Sagnac loop demonstrates a significant improvement in temperature and twist sensitivities. Additionally, it also possesses the capability to discern the direction of the twist. The embedded structure displays numerous advantages, including easy fabrication, low cost, good robustness, a wide range, and high sensitivity. These features make it highly suitable for applications in structural health monitoring and other related fields.

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“…Our sensor has a larger measurement range and higher sensitivity than those in Refs. [ 4 , 5 ]. Compared with the double helix of LPFGs in Refs.…”

Section: Resultsmentioning

confidence: 99%