Prof. Yunqi Liu Profile

Prof. Yunqi Liu

Professor at Shanghai Univ

SPIE Involvement:

Author

Publications (44)

Proceedings Article | 28 February 2021 Paper

Refractive index sensing properties of long-period fiber gratings at 2μm waveband

Yunhe Zhao, Zuyao Liu, Mingxu Li, Yunqi Liu, Yongsheng Yang, Wei Wang

Proceedings Volume 11781, 1178104 (2021) https://doi.org/10.1117/12.2591106

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Proceedings Article | 10 October 2020 Presentation

Highly sensitive optical sensors based on the coupling of high-order core modes

Yunqi Liu

Proceedings Volume 11555, 1155507 (2020) https://doi.org/10.1117/12.2574066

KEYWORDS: Optical sensors, Carbon dioxide lasers, Optical design, Fiber optics sensors

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Proceedings Article | 28 September 2015 Paper

Fabrication and sensing characteristics of helical long-period fiber gratings written in the rotated fiber by CO2 laser

Yunqi Liu, Liang Zhang, Hongliang Song, Tingyun Wang

Proceedings Volume 9634, 96346Y (2015) https://doi.org/10.1117/12.2194627

KEYWORDS: Carbon dioxide lasers, Fiber lasers, Single mode fibers, Refractive index, Temperature metrology, Sensors, Structured optical fibers, Communication engineering, Mirrors, Attenuators

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Proceedings Article | 11 November 2014 Paper

Measurements of high frequency vibration using fiber Bragg grating sensors packaged on PZT plate

Qiaofeng Fang, Wentao Chen, Zhenyu Yin, Yunqi Liu

Proceedings Volume 9274, 92740H (2014) https://doi.org/10.1117/12.2074165

KEYWORDS: Fiber Bragg gratings, Sensors, Polymers, Ferroelectric materials, Polymeric sensors, Ceramics, Oscilloscopes, Nonlinear response, Electromagnetism, Head

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Proceedings Article | 2 June 2014 Paper

Refractive index sensitivity of long-period fiber gratings written in thinned cladding fiber by CO2 laser

Yunqi Liu, Yunhe Zhao, Qiang Guo, Tingyun Wang

Proceedings Volume 9157, 915715 (2014) https://doi.org/10.1117/12.2059286

KEYWORDS: Refractive index, Cladding, Carbon dioxide lasers, Single mode fibers, Fiber lasers, Sensors, Optical communications, Fiber optics sensors, Structured optical fibers, Communication engineering

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Proceedings Article | 15 October 2013 Paper

Investigation of tilted long period fiber gratings in fiber tapers

Xiaobei Zhang, Yang Li, Fan Gu, Fufei Pang, Yunqi Liu, Tingyun Wang

Proceedings Volume 8924, 89242N (2013) https://doi.org/10.1117/12.2031387

KEYWORDS: Refractive index, Cladding, Structured optical fibers, Optical simulations, Fiber optic communications, Fiber Bragg gratings, Carbon dioxide lasers, Communication engineering, Optical communications, Fiber optics sensors

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Proceedings Article | 28 June 2013 Paper

Fabrication and sensing characteristics of tilted long-period fiber gratings

Tingyun Wang, Na Chen, Yunqi Liu, Fufei Pang, Rui Wu

Proceedings Volume 8561, 85610G (2013) https://doi.org/10.1117/12.999962

KEYWORDS: Carbon dioxide lasers, Refractive index, Cladding, Glasses, Structured optical fibers, Fiber lasers, Communication engineering, Optical communications, Environmental sensing, Optical components

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Proceedings Article | 30 November 2012 Paper

Investigation of effects of diameter on characteristics of a long-period fiber grating

Tingyun Wang, Yang Li, Fufei Pang, Yunqi Liu, Zhaohui Yin, Xiaobei Zhang

Proceedings Volume 8561, 85611H (2012) https://doi.org/10.1117/12.1000085

KEYWORDS: Cladding, Refractive index, Signal attenuation, Structured optical fibers, Numerical simulations, Fiber optics sensors, Modulation, Single mode fibers, Communication engineering, Fiber optic communications

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Proceedings Article | 29 November 2012 Paper

Resonant optical nonlinearity of Nb-doped silica fiber measured with LPFG interferometer

Qiang Guo, Yunqi Liu, Litao Wang, Na Chen, Zhenyi Chen, Tingyun Wang

Proceedings Volume 8554, 85541R (2012) https://doi.org/10.1117/12.2011021

KEYWORDS: Optical fibers, Nonlinear optics, Refractive index, Interferometers, Atomic layer deposition, Absorption, Fiber lasers, Silica, Specialty optical fibers, Doping

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Proceedings Article | 7 November 2012 Paper

Sensing properties of intrinsic Fabry-Perot interferometers in fiber tapers

Fufei Pang, Xiaobei Zhang, Jinlong Li, Yunqi Liu, Tingyun Wang, Wenyuan Wang, Yang Li

Proceedings Volume 8421, 842189 (2012) https://doi.org/10.1117/12.975454

KEYWORDS: Sensors, Fabry–Perot interferometry, Refractive index, Liquids, Femtosecond phenomena, Visibility, Fiber optics sensors, Optical fibers, Reflectivity, Lithium

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