Prof. Shengchun Liu Profile

Prof. Shengchun Liu

at Heilongjiang Univ

SPIE Involvement:

Author

Publications (19)

Proceedings Article | 17 August 2023 Paper

Fiber optic in-situ sensor for accurate monitoring the discharge quantity of lead-acid batteries

Yunxin Hu, Zifan Huang, Siyu Qian, Shengchun Liu

Proceedings Volume 12757, 1275733 (2023) https://doi.org/10.1117/12.2690783

KEYWORDS: Batteries, Electrolytes, Cladding, Fiber optics sensors, Refractive index, Optical sensing, Sensors, Reflection, Optical gratings, Optical fibers

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Proceedings Article | 18 March 2021 Paper

Force sensing based on all-fiber cavity ring-down spectroscopy

Lei Guo, Runna Wang, Shengchun Liu

Proceedings Volume 11780, 117801K (2021) https://doi.org/10.1117/12.2590711

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Proceedings Article | 8 January 2021 Paper

Acoustic sensor measurement system based on phase-shift fiber Bragg grating

Chengyuan Chen, Runna Wang, Xuefeng Chen, Shengchun Liu

Proceedings Volume 11607, 116070O (2021) https://doi.org/10.1117/12.2586779

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Proceedings Article | 23 October 2018 Paper

Multi-parameter sensing system based on a polarimetric fiber ring laser sensor and beat frequency demodulation

Xiujuan Yu, Xuefeng Chen, Yunxin Hu, Jintao Zhang, Shengchun Liu

Proceedings Volume 10821, 1082110 (2018) https://doi.org/10.1117/12.2502003

KEYWORDS: Fiber lasers, Birefringence, Polarization, Sensors, Fiber optics sensors, Temperature metrology, Sensing systems, Demodulation, Fiber Bragg gratings

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Proceedings Article | 10 January 2018 Paper

A 16-channel multi-longitudinal mode fiber laser sensor array system based on wavelength/frequency division multiplexing

Yunxin Hu, Zhiyong Han, Xiujuan Yu, Xuefeng Chen, Jintao Zhang, Shengchun Liu

Proceedings Volume 10618, 106180T (2018) https://doi.org/10.1117/12.2295288

KEYWORDS: Sensors, Fiber lasers, Multiplexing, Fiber Bragg gratings, Wavelength division multiplexing, Demodulation, Temperature metrology, Signal detection, Dense wavelength division multiplexing, Laser systems engineering

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The 16-channel multi-longitudinal mode fiber laser sensor array is investigated experimentally by the wavelength/frequency division multiplexing technique. In the proposed sensing system, a 4×4 sensor array is established by a few different coupling-ratio couplers, and four different fiber Bragg gratings (FBG) with different center wavelengths are used as four different sensing units. In each sensor unit, four parallel fiber laser sensors have the same operating wavelengths FBGs, but their effective laser cavity lengths slightly different from each other. Every cavity is formed by a fiber Bragg grating (FBG) serving as one reflection mirror, a piece of erbium-doped fiber (EDF) acting as the gain medium, and a Faraday rotator mirror (FRM) serving as other reflection mirror. When the pump power is higher than threshold value, the 16-channel fiber laser sensor array is stimulated stably. The frequency of the beat signal of the fiber laser sensor with different cavity lengths is used to realize frequency division multiplexing, and the wavelength division multiplexing is realized according to the operation wavelength of the fiber laser. The beat frequency signals are generated on a photodetector(PD), and monitored by a frequency spectrum analyzer(FSA). By tracking the shift of the beat frequency, all of the 16 laser sensors can be demodulated and real-time discriminated. The result of the experiment shows that different channels can be demodulated independently. The applications of the sensor array for strain and temperature measurements are also investigated. The strain or temperature information can be extracted from the change of the beat frequency signals according to the wavelength-frequency division multiplexing and the beat signal demodulation. The proposed hybrid multiplexing system can greatly reduce the weight, volume, and cost of the fiber laser sensors system while increasing the amount of the sensors multiplexable, which making it very competitive in some applications fields requiring large scale arrays such as space vehicles, marine infrastructure systems and constructional engineering.

Proceedings Article | 28 August 2016 Paper

Testing optical surfaces using two-frame phase-shifting interferometry

Chao Tian, Shengchun Liu

Proceedings Volume 9960, 996017 (2016) https://doi.org/10.1117/12.2238323

KEYWORDS: Aspheric optics, Optical testing, Fringe analysis, Phase interferometry, Phase shifts, Mirrors, Calibration, Demodulation, Modulation, Charge-coupled devices

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Proceedings Article | 28 August 2016 Paper

Orthogonal polynomials and global optimization based demodulation of two-shot fringe patterns

Chao Tian, Shengchun Liu

Proceedings Volume 9960, 996018 (2016) https://doi.org/10.1117/12.2238342

KEYWORDS: Phase shifts, Fringe analysis, Demodulation, Optical testing, Phase shifts, Interferometry, Phase retrieval, Optimization (mathematics), Algorithm development, Zernike polynomials, Modulation

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Proceedings Article | 15 March 2016 Paper

Label-free imaging of gold nanoparticles in single live cells by photoacoustic microscopy

Chao Tian, Wei Qian, Xia Shao, Zhixing Xie, Xu Cheng, Shengchun Liu, Qian Cheng, Bing Liu, Xueding Wang

Proceedings Volume 9708, 970857 (2016) https://doi.org/10.1117/12.2213744

KEYWORDS: Gold, Nanoparticles, Photoacoustic microscopy, Confocal microscopy, Microscopy, Live cell imaging, Image resolution, Photoacoustic spectroscopy, Prostate, Luminescence, Visualization, Cancer, Transmission electron microscopy, Nanomedicine

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Proceedings Article | 15 March 2016 Presentation + Paper

Characterizing intestinal strictures with acoustic resolution photoacoustic microscopy

Hao Lei, Guan Xu, Shengchun Liu, Laura Johnson, David Moons, Peter D. Higgins, Michael Rice, Jun Ni, Xueding Wang

Proceedings Volume 9708, 97080K (2016) https://doi.org/10.1117/12.2208902

KEYWORDS: Endoscopy, Microscopy, Acoustics, Photoacoustic microscopy, Diagnostics, Photoacoustic imaging, Biopsy, Collagen, Absorption, Tissue optics, Prototyping, Image resolution, Ultrasonics

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Proceedings Article | 30 November 2012 Paper

Characteristics of in-fiber Mach-Zehnder interferometer formed by lateral offset splicing

Xiujuan Yu, Ge Li, Shengchun Liu, Jintao Zhang, Xuefeng Chen, Liying Zhang, Yanbiao Liao

Proceedings Volume 8561, 85611P (2012) https://doi.org/10.1117/12.981889

KEYWORDS: Interferometers, Mach-Zehnder interferometers, Single mode fibers, Sensors, Fusion splicing, Refractive index, Cladding, Samarium, Germanium, Lithium

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Proceedings Article | 7 November 2012 Paper

Hollow-core photonic bandgap fiber Mach-Zehnder interferometer based on a long period grating and an offset-splice joint

Xiujuan Yu, Jian Ju, Wei Jin, Jintao Zhang, Shengchun Liu

Proceedings Volume 8421, 84216T (2012) https://doi.org/10.1117/12.966812

KEYWORDS: Mach-Zehnder interferometers, Interferometers, Temperature metrology, Carbon dioxide lasers, Fusion splicing, Refractive index, Beam splitters, Cladding, Infrared cameras, Sensors

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Proceedings Article | 29 November 2011 Paper

Wireless fiber laser sensor combining photonic generation beat frequency demodulation technology

Shengchun Liu, Rong Gu, Xiujuan Yu, Zuowei Yin, Xiangfei Chen

Proceedings Volume 8311, 83112D (2011) https://doi.org/10.1117/12.904625

KEYWORDS: Sensors, Fiber lasers, Antennas, Fiber optics sensors, Fiber Bragg gratings, Demodulation, Photodetectors, Receivers, Laser resonators, Signal attenuation

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Proceedings Article | 18 May 2011 Paper

Response of hydrogel coated cascaded long period gratings to relative humidity

Xiujuan Yu, Min Zhang, Shengchun Liu, Yanbiao Liao, Wei Jin

Proceedings Volume 7753, 775390 (2011) https://doi.org/10.1117/12.883614

KEYWORDS: Humidity, Visibility, Coating, Cladding, Signal attenuation, Sensors, Temperature metrology, Water, Interferometers, Refractive index

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SPIE Journal Paper | 1 May 2011

Multilongitudinal mode fiber-ring laser sensor for strain measurement

Shengchun Liu, Rong Gu, Liang Gao, Zuowei Yin, Liang Zhang, Xiangfei Chen, Jianchun Chen

OE, Vol. 50, Issue 05, 054401, (May 2011) https://doi.org/10.1117/12.10.1117/1.3574376

KEYWORDS: Sensors, Fiber lasers, Fiber Bragg gratings, Fiber optics sensors, Signal to noise ratio, Laser resonators, Modes of laser operation, Reflectors, Signal detection, Signal generators

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Proceedings Article | 3 January 2011 Paper

Multi-longitudinal mode fiber laser sensor combining the fiber Bragg grating reflector

Shengchun Liu, Liang Gao, Zuowei Yin, Liang Zhang, Xiangfei Chen, Jianchun Cheng

Proceedings Volume 7990, 799003 (2011) https://doi.org/10.1117/12.888679

KEYWORDS: Sensors, Fiber Bragg gratings, Fiber lasers, Reflectors, Signal to noise ratio, Laser resonators, Demodulation, Fiber optics sensors, Polarization, Signal generators

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Proceedings Article | 9 November 2010 Paper

A fiber laser accelerometer based on the double flexural strips structure

Shengchun Liu, Liying Zhang, Xuefeng Zhu, Jintao Zhang, Xiangfei Chen, Jianchen Cheng

Proceedings Volume 7853, 78533V (2010) https://doi.org/10.1117/12.871782

KEYWORDS: Fiber lasers, Sensors, Fiber Bragg gratings, Structured optical fibers, Interferometers, Signal to noise ratio, Head, Copper, Structural design, Phase shifts

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Proceedings Article | 2 December 2009 Paper

A novel FBG laser sensor based on beat frequency modulation technology

Liang Zhang, Shengchun Liu, Zuowei Yin, Liang Gao, Xiangfei Chen

Proceedings Volume 7630, 76301N (2009) https://doi.org/10.1117/12.852029

KEYWORDS: Sensors, Fiber Bragg gratings, Modulators, Fiber lasers, Modulation, Spectrum analysis, Laser applications, Frequency modulation, Photodetectors, Demodulation

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Proceedings Article | 21 November 2007 Paper

A novel interrogation technique for time-division multiplexing fiber Bragg grating sensor arrays

Shengchun Liu, Youlong Yu, Jintao Zhang, Sun Fei

Proceedings Volume 6781, 67812M (2007) https://doi.org/10.1117/12.745990

KEYWORDS: Sensors, Fiber Bragg gratings, Switches, Time division multiplexing, Modulators, Modulation, Michelson interferometers, Ferroelectric materials, Sensing systems, Analog electronics

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Proceedings Article | 28 September 2006 Paper

Multi-channel output of time division multiplexed fiber Bragg grating sensing network based on a cascade electrical switches array

Shengchun Liu, Jintao Zhang, Youlong Yu

Proceedings Volume 6354, 63542G (2006) https://doi.org/10.1117/12.687542

KEYWORDS: Switches, Fiber Bragg gratings, Sensors, Multiplexing, Michelson interferometers, Signal detection, Sensing systems, Modulation, Electrooptic modulators, Signal generators

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Showing 5 of 19 publications

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