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39 results on '"Zhong, Huajian"'

10. 光纤三维形状传感技术研究进展

Author

Meng, Yanjie, primary, Fu, Cailing, additional, Zhong, Huajian, additional, Peng, Zhenwei, additional, Fan, Yu, additional, Sui, Ronglong, additional, Liang, Wenfa, additional, Dan, Rongyi, additional, Xiao, Shuai, additional, Kong, Yuhao, additional, and Wang, Yiping, additional

Published
2023
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16. Distributed Refractive Index Sensing Based on Etched Ge-Doped SMF in Optical Frequency Domain Reflectometry.

Author

Fu, Cailing, Sui, Ronglong, Peng, Zhenwei, Meng, Yanjie, Zhong, Huajian, Li, Mingquan, Yin, Xiaoyu, and Wang, Yiping

Subjects
REFRACTIVE index, OPTICAL time-domain reflectometry, REFLECTOMETRY, SINGLE-mode optical fibers, OPTICAL fibers, HYDROFLUORIC acid, SPATIAL resolution
Abstract

A distributed optical fiber refractive index sensor based on etched Ge-doped SMF in optical frequency domain reflection (OFDR) was proposed and demonstrated. The etched Ge-doped SMF was obtained by only using wet-etching, i.e., hydrofluoric acid solution. The distributed refractive index sensing is achieved by measuring the spectral shift of the local RBS spectra using OFDR. The sensing length of 10 cm and the spatial resolution of 5.25 mm are achieved in the experiment. The refractive index sensing range is as wide as 1.33–1.44 refractive index units (RIU), where the average sensitivity was about 757 GHz/RIU. Moreover, the maximum sensitivity of 2396.9 GHZ/RIU is obtained between 1.43 and 1.44 RIU. [ABSTRACT FROM AUTHOR]

Published
2023
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28. High-Spatial-Resolution Strain Sensor Based on Rayleigh-Scattering-Enhanced SMF Using Direct UV Exposure

Author

Du, Chao, Fu, Cailing, Li, Pengfei, Meng, Yanjie, Zhong, Huajian, Du, Bin, Guo, Kuikui, Chen, Lin, Wang, Yiping, and He, Jun

Abstract

A high-spatial-resolution, i.e., 2.0 mm, strain sensor based on a Rayleigh-scattering-enhanced SMF, i.e., exposed SMF (E-SMF) with direct UV laser, was experimentally demonstrated. The enhancement of Rayleigh-scattering (RS) intensity could be tuned by adjusting the exposure parameters, i.e., distance between SMF and Phase mask, energy of UV laser and velocity of the SMF. A 1.0 m long E-SMF with a RS enhancement of 37.3 dB was obtained, where the exposure time was only 100 s. Compared with the un-exposed SMF (UE-SMF), the strain profiles of the E-SMF could be clearly demodulated without fluctuation at a spatial resolution of 2.0 mm using traditional cross-correlation algorithm when the applied strain was from 200 to 2600 μϵ.

Published
2023
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30. Inflammatory‐sensitive CHI3L1 protects nucleus pulposus via AKT3 signaling during intervertebral disc degeneration

Author

Wang, Ruizhe, primary, Xu, Chen, additional, Zhong, Huajian, additional, Hu, Bo, additional, Wei, Leixin, additional, Liu, Ning, additional, Zhang, Yizhi, additional, Shi, Qianghui, additional, Wang, Chen, additional, Qi, Min, additional, Gu, Yifei, additional, Shen, Xiaolong, additional, Tian, Ye, additional, Liu, Yang, additional, Cao, Peng, additional, Chen, Huajiang, additional, and Yuan, Wen, additional

Published
2020
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31. MicroRNA-181 regulates the development of Ossification of Posterior longitudinal ligament via Epigenetic Modulation by targeting PBX1

Author

Liu, Ning, primary, Zhang, Zicheng, additional, Li, Li, additional, Shen, Xiaolong, additional, Sun, Baifeng, additional, Wang, Ruizhe, additional, Zhong, Huajian, additional, Shi, Qianghui, additional, Wei, Leixin, additional, Zhang, Yizhi, additional, Wang, Yue, additional, Xu, Chen, additional, Liu, Yang, additional, and Yuan, Wen, additional

Published
2020
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36. Length-extended 3D shape sensor using wavelength/space-division multiplexing grating arrays in a multicore fiber.

Author

Meng Y, Xiao S, Shan R, Liang W, Zhong H, Kong Y, Peng Z, Fu C, Liao C, Zhang Z, and Wang Y

Abstract

Limited by the multiplexing number of fiber Bragg grating (FBG), further improvement in the length of 3D shape sensing based on FBG technology is challenging. In this Letter, a wavelength-division and space-division multiplexing multicore fiber grating method is proposed, which extends the sensing length. Employing the femtosecond-laser point-by-point technology, we inscribed WDM grating arrays in six outer cores of a seven-core fiber, respectively. Three cores were utilized as a segment for shape sensing, and two such segments were offset by a specific length and combined to form a shape sensor. Utilizing an FBG interrogator, the proposed shape sensor achieved 2D and 3D shape sensing at a length of 967 mm and effectively mitigated the effects of temperature variations. In experiments, maximum shape reconstruction errors per unit lengths are 1.89%, 2.72%, and 1.47% for 2D shape, 3D shape, and an arbitrary shape under variable temperature conditions, respectively. The proposed method holds promise for further extending the shape sensing length by utilizing multicore fibers or fiber clusters containing more cores.

Published
2024
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38. Wide-range OFDR strain sensor based on the femtosecond-laser-inscribed weak fiber Bragg grating array.

Author

Fu C, Sui R, Peng Z, Meng Y, Zhong H, Shan R, Liang W, Liao C, Yin X, and Wang Y

Abstract

A wide-range OFDR strain sensor was demonstrated based on femtosecond-laser-inscribed weak fiber Bragg grating (WFBG) array in standard SMF. A WFBG array consisting of 110 identical WFBGs was successfully fabricated along a 56 cm-long SMF. Compared with SMF, the cross-correlation coefficient of WFBG array was improved to 0.9 under the strain of 10,000 µε. The position deviation under the strain of 10,000 µε, i.e., 2.5 mm, could be accurately obtained and compensated simply by using peak finding algorithm. The maximum measurable strain of single- and multi-point strain sensing was up to 10,000 µε without using any additional algorithms, where the sensing spatial resolution was 5 mm.

Published
2023
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39. Ultra-linear broadband optical frequency sweep for a long-range and centimeter-spatial-resolution OFDR.

Author

Zhong H, Fu C, Li P, Du B, Du C, Meng Y, Yin X, Liao C, and Wang Y

Abstract

We demonstrated a long-range and centimeter-spatial-resolution optical frequency domain reflectometry (OFDR) system based on an ultra-linear broadband optical frequency sweep. The high nonlinear sweeping effect of the distributed feedback (DFB) diode laser was suppressed by a pre-distortion method, ensuring that the injection-locking process remained stable during fast tuning over a large span. An optical linear frequency sweep (LFS) with a sweep range and sweep rate of up to 60 GHz and 15 THz/s, respectively, was ultimately obtained by optimizing the injection-locking system. The high performance OFDR based on the proposed LFS achieved a sampling spatial resolution of 1.71 mm. Furthermore, distributed strain sensing was implemented with high-spatial resolutions of about 5 cm and 7 cm in the measurement range over 1 km and 2 km, respectively.

Published
2023
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