A5086943621- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Advanced Measurement and Metrology Techniques
- Semiconductor Lasers and Optical Devices
- Photonic Crystal and Fiber Optics
- Quantum optics and atomic interactions
- Optical measurement and interference techniques
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Optical Systems and Laser Technology
- Advanced MEMS and NEMS Technologies
- Semiconductor Quantum Structures and Devices
- Quantum Information and Cryptography
- Advanced Sensor and Control Systems
- Geophysics and Sensor Technology
- Atomic and Subatomic Physics Research
- Advanced Surface Polishing Techniques
- Intermetallics and Advanced Alloy Properties
- Optical Network Technologies
- Advanced Measurement and Detection Methods
- Quantum and electron transport phenomena
- Magneto-Optical Properties and Applications
- Nuclear physics research studies
- Ship Hydrodynamics and Maneuverability
Anhui University
2014-2025
Ministry of Education of the People's Republic of China
2022
Anhui Polytechnic University
2021
University of Birmingham
2005-2013
University of Houston
2011
Dalian University
2006
Dalian University of Technology
2006
Dalian Maritime University
2004
Beihang University
1993
This study proposes a highly sensitive and stable optical fiber probe based on Vernier effect for high temperature measurement (up to 1000 °C), utilizing photonic crystal (PCF)-based Fabry-Perot interferometers (FPIs). The cascaded FPIs are fabricated by fusion splicing section of polarization maintaining PCF lead-in single-mode fiber, then temperature-insensitive hollow core is spliced between the PMPCF multi-mode fiber. shift spectral envelope monitored measure variation. Experimental...
A phase-shifted demodulation technique with a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mn>3</mml:mn> </mml:mrow> <mml:mo>×</mml:mo> </mml:math> coupler and ellipse fitting algorithm (EFA) for the interrogation of interferometric sensors is proposed. To reduce error EFA as to measure small phase signals, additional modulation introduced. The provides walk operating point along Lissajous large enough permit calculation...
An improved ellipse-fitting algorithm phase demodulation (EFAPD) technique is proposed to reduce the influence of light source intensity noise on a system. In original EFAPD, sum intensities coherent (ICLS) an important part interference signal noise, which makes results suffer. The EFAPD corrects ICLS and fringe contrast quantity by algorithm, then calculates based structure pull-cone 3 × coupler, so as remove it in algorithm. Experimental show that system significantly reduced compared...
An ameliorated phase generated carrier demodulation algorithm based on a reference interferometer is proposed. It theoretically analyzed, numerically simulated, and experimentally verified in this paper. The method of matching the amplitude quadrature signal eliminates harmonic distortion caused by modulation depth fluctuations, suppresses system noise, improves stability. In experiments, where sensed 0.68 rad, frequency 1 kHz, ranges from 1.5 to 3.5 has SINAD that reaches 24.5 dB, which an...
A single-wavelength passive phase-shifted demodulation technique for the interrogation of a diaphragm-based fiber sensor is proposed. It based on configuration external Fabry–Perot interferometer (EFPI) with dual-cavity (DC) and ellipse-fitting algorithm (EFA). The can address two main concerns: orthogonality DC-EFPI must be matched, direct current values fringe visibility DC–EFPI excluded or normalized. Experiment results show that proposed demonstrates high accuracy amplitude measurement...
A cantilever fiber-optic accelerometer using modal interferometer, with a large fringe visibility of up to 30 dB, is proposed and demonstrated. In the system, an electrical testing replaces optical-spectrum detection achieve fast acceleration measurement accelerometer, performance studied experimentally. Experimental results show that minimum detectable 1.36 mg, resonance frequency 520 Hz. Meanwhile, angular dependence fiber also analyzed in article result shows output intensity difference...
Phase generated carrier (PGC) demodulation technology has been widely used in fiber-optic interferometric sensors while nonlinearity is always accompanying with the scheme. We propose a highly stable PGC algorithm combining internal modulation, ellipse fitting (EFA), phase modulation depth ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> ) self-calibration and differential-cross-multiplying (DCM). A low frequency triangular signal...
Traditional phase generation carrier technology requires to control the modulation depth at an optimal value for accurate demodulation. In this paper, we proposed algorithm directly eliminate real-time based on multi-harmonics frequency mixing avoiding influence of demodulation result. Experiments show that when is in range 1.5 3.5 rad, SINAD improved can reach 37.1 dB, which 13.2 dB higher than traditional PGC-Arctan average. The THD 0.322%, always maintains best level algorithm. provides...
For the optical fiber sensing system using phase generated carrier (PGC) technology, it is very important to eliminate nonlinear effect of modulation depth (C) fluctuation on demodulation results in actual environment. In this paper, an ameliorated technique presented calculate C value and suppress its influence results. The calculated out by fundamental third harmonic components with equation fitted orthogonal distance regression algorithm. Then Bessel recursive formula used convert...
In the reference interferometer demodulation scheme, it's difficult to guarantee in practice that both interferometers have same optical path length difference (OPD), which makes phase modulation depth different with laser modulation. The random shift of also affects results. An improved phase-generated carrier (PGC) technique is proposed based on an auxiliary and ellipse fitting algorithm (EFA). ensures correct EFA for small amplitude signals by introducing a sinusoidal signal as additional...