Prof. Yunqi Liu Profile

Prof. Yunqi Liu

Professor at Shanghai Univ

SPIE Involvement:

Author

Publications (45)

Proceedings Article | 11 October 2024 Paper

Mode converter based on the long-period fiber gratings written by the electric arc discharge method

Dandan Liu, Wei Chen, Fei Wang, Chengbo Mou, Yunqi Liu

Proceedings Volume 13287, 132870N (2024) https://doi.org/10.1117/12.3038826

KEYWORDS: Refractive index, Optical gratings, Optical fibers, Finite element methods, Simulations

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Proceedings Article | 28 February 2021 Paper

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

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

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

Liang Zhang, Yunqi Liu, 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

Yunhe Zhao, Yunqi Liu, 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

Yang Li, Xiaobei Zhang, 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

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

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

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

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

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

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

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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