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Ultrasonic sensitivity-improved fiber-optic Fabry-Perot interferometer using a beam collimator and its application for ultrasonic imaging of seismic physical models 被引量:3
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作者 Zhi-Hua Shao Xue-Guang Qiao +1 位作者 Feng-Yi Chen and Qiang-Zhou Rongt 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第9期128-136,共9页
An ultrasonic sensitivity-improved fiber-optic Fabry-Perot interferometer (FPI) is proposed and employed for ultra- sonic imaging of seismic physical models (SPMs). The FPI comprises a flexible ultra-thin gold fil... An ultrasonic sensitivity-improved fiber-optic Fabry-Perot interferometer (FPI) is proposed and employed for ultra- sonic imaging of seismic physical models (SPMs). The FPI comprises a flexible ultra-thin gold film and the end face of a graded-index multimode fiber (MMF), both of which are enclosed in a ceramic tube. The MMF in a specified length can collimate the diverged light beam and compensate for the light loss inside the air cavity, leading to an increased spectral fringe visibility and thus a steeper spectral slope. By using the spectral sideband filtering technique, the collimated FP1 shows an improved ultrasonic response. Moreover, two-dimensional images of two SPMs are achieved in air by recon- structing the pulse-echo signals through using the time-of-flight approach. The proposed sensor with easy fabrication and compact size can be a good candidate for high-sensitivity and high-precision nondestructive testing of SPMs. 展开更多
关键词 fiber-optic sensor fabry-perot interferometer seismic physical model
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Utilization of Extrinsic Fabry-Perot Interferometers with Spectral Interferometric Interrogation for Microdisplacement Measurement
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作者 Leonid Liokumovich Aleksandr Markvart Nikolai Ushakov 《Journal of Electronic Science and Technology》 CAS CSCD 2020年第1期59-75,共17页
The paper presents a number of signal processing approaches for the spectral interferometric interrogation of extrinsic Fabry-Perot interferometers(EFPIs). The analysis of attainable microdisplacement resolution is pe... The paper presents a number of signal processing approaches for the spectral interferometric interrogation of extrinsic Fabry-Perot interferometers(EFPIs). The analysis of attainable microdisplacement resolution is performed and the analytical equations describing the dependence of resolution on parameters of the interrogation setup are derived. The efficiency of the proposed signal processing approaches and the validity of analytical derivations are supported by experiments. The proposed approaches allow the interrogation of up to four multiplexed sensors with attained resolution between 30 pm and 80 pm, up to three times improvement of microdisplacement resolution of a single sensor by means of using the reference interferometer and noisecompensating approach, and ability to register signals with frequencies up to 1 kHz in the case of 1 Hz spectrum acquisition rate. The proposed approaches can be used for various applications, including biomedical, industrial inspection, and others, amongst the microdisplacement measurement. 展开更多
关键词 Absolute MEASUREMENT dynamic MEASUREMENT fabry-perot interferometer LEAST-SQUARES methods optical fiber sensors RESOLUTION analysis RESOLUTION enhancement sensor multiplexing SPECTRAL interferometry
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Coulomb-Dominated Oscillations in Fabry-Perot Quantum Hall Interferometers
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作者 朱玉莹 白孟孟 +6 位作者 郑树玉 樊洁 景秀年 姬忠庆 杨昌黎 刘广同 吕力 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第6期91-95,共5页
Periodic resistance oscillations in Fabry-Perot quantum Hall interferometers are observed at integer filling factors of the constrictions, fc=1, 2, 3, 4, 5 and 6. Rather than the Aharonov-Bohm interference, these osci... Periodic resistance oscillations in Fabry-Perot quantum Hall interferometers are observed at integer filling factors of the constrictions, fc=1, 2, 3, 4, 5 and 6. Rather than the Aharonov-Bohm interference, these oscillations are attributed to the Coulomb interactions between interfering edge states and localized states in the central island of an interferometer, as confirmed by the observation of a positive slope for the lines of constant oscillation phase in the image plot of resistance in the 13 Vs plane. Similar resistance oscillations are also observed when the area A of the center regime and the backseattering probability of interfering edge states are varied, by changing the side-gate voltages and the configuration of the quantum point contacts, respectively. The oscillation amplitudes decay exponentially with temperature in the ramge of 40mK〈 T ≤ 130 mK, with a characteristic temperature T0 -25 mK, consistent with recent theoretical and experimental works. 展开更多
关键词 Coulomb-Dominated Oscillations in fabry-perot Quantum Hall interferometers
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Integrated Fabry–Perot interferometer based on Er/Yb co-doped fiber for all-optical phase modulation
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作者 汪凡 林思雨 +2 位作者 曲彦臣 韩晓鹏 掌蕴东 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第4期95-100,共6页
Fast and stable phase control is essential for many applications in optics. Here, we propose an all-fiber all-optical phase modulation scheme based on a Fabry–Perot interferometer(FPI) and an Er/Yb co-doped fiber(EYD... Fast and stable phase control is essential for many applications in optics. Here, we propose an all-fiber all-optical phase modulation scheme based on a Fabry–Perot interferometer(FPI) and an Er/Yb co-doped fiber(EYDF). By using the EYDF as an F-P cavity via rational design, a phase shift with a modulation sensitivity of 0.0312π/mW is introduced to the modulator.The phase shifts in the EYDF consist of a thermal phase shift and a nonlinear phase shift with a ratio of 19:1, and the corresponding temporal responses of the modulation are 204 ms and 2.5 ms, respectively. In addition, the compact FPI is encapsulated to provide excellent stability for the modulator. 展开更多
关键词 in-line fabry-perot interferometer nonlinear phase shift all-optical phase modulation
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Fiber Fabry-Perot Demodulation System Based on Dual Fizeau Interferometers
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作者 Deyi KONG Zengyu SONG +4 位作者 Ning WANG Zhiqi WANG Peijian HUANG Yong ZHU Jie ZHANG 《Photonic Sensors》 SCIE EI CSCD 2023年第2期56-68,共13页
In this study,we present a dual-Fizeau-interferometer-based high-speed and wide-range fiber-optic Fabry-Perot(F-P)demodulation system.We employ two Fizeau interferometers with air cavity thickness satisfying the quadr... In this study,we present a dual-Fizeau-interferometer-based high-speed and wide-range fiber-optic Fabry-Perot(F-P)demodulation system.We employ two Fizeau interferometers with air cavity thickness satisfying the quadrature requirement to increase the demodulation speed and broaden the demodulation range in order to address the issues of the existing fiber F-P demodulation system's sluggish demodulation rate and limited range.In order to investigate the demodulation properties of the dual-Fizeau-interferometer-based demodulation system,we derive and create a theoretical model of the system.The theoretical model,which primarily consists of the structural design of the interferometer and the study of the center wavelength of the light sources and their bandwidth selection,is used to construct the optical structure of the demodulation system.According to the calculation results,the demodulated signal exhibits the best contrast ratio when the two light sources'respective center wavelengths are 780nm and 850nm,and their bandwidths are 28nm and 30 nm.Finally,we finish evaluating the demodulation system's demodulation performance,parameter calibration,and assembly debugging.The test results demonstrate the constant operation of the demodulation system,an update rate of 100kHz,a demodulation range of 4.74μm,and a cavity length resolution of approximately 5 nm.Additionally,the system can perform high speed demodulation thanks to the light emitting diode's(LED's)nanosecond level switching speed and the usage of a single point detector. 展开更多
关键词 Fiber-optic fabry-perot sensor Fizeau interferometer LED optical path difference quadrature requirement
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Application of Wavelet Transform in Dual-differential Optical Fiber F-P Interferometric Micro-displacement Measurement System
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作者 ZHANG Shu-qing YANG Feng-lu WANG Xue-qiang BAI Qin-yuan ZHANG Li-guo 《Semiconductor Photonics and Technology》 CAS 2005年第4期263-265,共3页
Based on dual-differential comparing principle, an experimental system of optical fiber F-P interferometric micro-displacement measurement is introduced. It is capable of achieving the absolute displacement measuremen... Based on dual-differential comparing principle, an experimental system of optical fiber F-P interferometric micro-displacement measurement is introduced. It is capable of achieving the absolute displacement measurement, and wavelet transforms is adopted as theory fundament to extract the optical F-P interferometric characteristic signal and remove the noise, so its resolution can reach 0. 01 μm in the dynamic range of 0~ 1 mm. 展开更多
关键词 Optical fiber fabry-perot interferometer MICRO-DISPLACEMENT Dual differential Wavelet transform
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Pressure Sensor Based on the Fiber-Optic Extrinsic Fabry-Perot Interferometer 被引量:19
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作者 Qingxu YU Xinlei ZHOU 《Photonic Sensors》 SCIE EI 2011年第1期72-83,共12页
Pressure sensors based on fiber-optic extrinsic Fabry-Perot interferometer(EFPI)have been extensively applied in various industrial and biomedical fields.In this paper,some key improvements of EFPI-based pressure sens... Pressure sensors based on fiber-optic extrinsic Fabry-Perot interferometer(EFPI)have been extensively applied in various industrial and biomedical fields.In this paper,some key improvements of EFPI-based pressure sensors such as the controlled thermal bonding technique,diaphragm-based EFPI sensors,and white light interference technology have been reviewed.Recent progress on signal demodulation method and applications of EFPI-based pressure sensors has been introduced.Signal demodulation algorithms based on the cross correlation and mean square error(MSE)estimation have been proposed for retrieving the cavity length of EFPI.Absolute measurement with a resolution of 0.08 nm over large dynamic range has been carried out.For downhole monitoring,an EFPI and a fiber Bragg grating(FBG)cascade multiplexing fiber-optic sensor system has been developed,which can operate in temperature 300℃with a good long-term stability and extremely low temperature cross-sensitivity.Diaphragm-based EFPI pressure sensors have been successfully used for low pressure and acoustic wave detection.Experimental results show that a sensitivity of 31 mV/Pa in the frequency range of 100 Hz to 12.7 kHz for aeroacoustic wave detection has been obtained. 展开更多
关键词 Pressure measurement fabry-perot interferometer signal demodulation downhole monitoring fiber acoustic sensor
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Generation of millimeter-wave sub-carrier optical pulse by using a Fabry-Perot interferometer 被引量:9
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作者 叶青 瞿荣辉 方祖捷 《Chinese Optics Letters》 SCIE EI CAS CSCD 2007年第1期8-10,共3页
A novel scheme is proposed to transform a Gaussian optical pulse to a millimeter-wave (mm-wave) frequency modulation pulse by using a Fabry-Perot interferometer (FPI) for radio-over-fiber (ROF) system. It is sho... A novel scheme is proposed to transform a Gaussian optical pulse to a millimeter-wave (mm-wave) frequency modulation pulse by using a Fabry-Perot interferometer (FPI) for radio-over-fiber (ROF) system. It is shown that modulation frequency of mm-wave is determined by the optical path of the Fabry-Perot (F-P) cavity, and amplitude decay time and energy transfer efficiency axe related to the reflectivity of the F-P cavity mirror. The effect of pulse train extension on inter-symbol interference is also discussed. 展开更多
关键词 WAVE Generation of millimeter-wave sub-carrier optical pulse by using a fabry-perot interferometer
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An Extrinsic Fiber Fabry-Perot Interferometer for Dynamic Displacement Measurement 被引量:3
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作者 S. PULLTEAP H. C. SEAT 《Photonic Sensors》 SCIE EI CAS CSCD 2015年第1期50-59,共10页
A versatile fiber interferometer was proposed for high precision measurement. The sensor exploited a double-cavity within the unique sensing arm of an extrinsic-type fiber Fabry-Perot interferometer to produce the qua... A versatile fiber interferometer was proposed for high precision measurement. The sensor exploited a double-cavity within the unique sensing arm of an extrinsic-type fiber Fabry-Perot interferometer to produce the quadrature phase-shifted interference fringes. Interference signal processing was carried out using a modified zero-crossing (fringe) counting technique to demodulate two sets of fringes. The fiber interferometer has been successfully employed for dynamic displacement measurement under different displacement profiles over a range of 0.7 p.m to 140 p.m. A dedicated computer incorporating the demodulation algorithm was next used to interpret these detected data as well as plot the displacement information with a resolution of 2/64. A commercial displacement sensor was employed for comparison purposes with the experimental data obtained from the fiber interferometer as well as to gauge its performance, resulting in the maximum error of 2.8% over the entire displacement range studied. 展开更多
关键词 fabry-perot interferometer vibration analysis fringe counting technique displacement profile
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Zeolite Thin Film-Coated Fiber Sensors Based on Fabry-Perot Interferometer for Detection of Chemical Vapors 被引量:3
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作者 Xiangping NING Chunliu ZHAO Feifei SHI Juan KANG 《Photonic Sensors》 SCIE EI CAS CSCD 2015年第2期137-141,共5页
A novel zeolite-coated fiber sensors for detection of volatile organic compounds (VOCs) based on the Fabry-Perot interferometer was proposed and demonstrated. The sensor comprised a polycrystalline silicalite thin f... A novel zeolite-coated fiber sensors for detection of volatile organic compounds (VOCs) based on the Fabry-Perot interferometer was proposed and demonstrated. The sensor comprised a polycrystalline silicalite thin film grown up on the cleaved end face of a standard single-mode fiber. The inline Fabry-Perot cavity was composed by the end face of the single-mode fiber and the thin film. The sensor device operated by measuring the interference signal, which was a function of the amount of chemical vapor adsorption in its crystalline micro porous structure. Experimental results showed that the proposed VOC sensor worked well and the sensitivities were 2.78×10^-3dB/ppm when the concentration ranged from 350ppm to 2100ppm and 1.23×10^-3 dB/ppm when the concentration ranged from 2100ppm to 5250 ppm. 展开更多
关键词 Zeolite film volatile organic compound (VOC) sensor fabry-perot interferometer
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Fiber Fabry-Perot Interferometer for Curvature Sensing 被引量:2
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作者 Catarina S. MONTEIRO1 Marta S. FERREIRA +4 位作者 Susana O. SILVA Jens KOBELKE Kay SCHUSTER JOrg BIERLICH Orlando FRAZAO 《Photonic Sensors》 SCIE EI CAS CSCD 2016年第4期339-344,共6页
A curvature sensor based on an Fabry-Perot (FP) interferometer was proposed. A capillary silica tube was fusion spliced between two single mode fibers, producing an FP cavity. Two FP sensors with different cavity le... A curvature sensor based on an Fabry-Perot (FP) interferometer was proposed. A capillary silica tube was fusion spliced between two single mode fibers, producing an FP cavity. Two FP sensors with different cavity lengths were developed and subjected to curvature and temperature. The FP sensor with longer cavity showed three distinct operating regions for the curvature measurement. Namely, a linear response was shown for an intermediate curvature radius range, presenting a maximum sensitivity of 68.52 pm/m-1. When subjected to temperature, the sensing head produced a similar response for different curvature radii, with a sensitivity varying from 0.84 pm/℃ to 0.89 pm/℃, which resulted in a small cross-sensitivity to temperature when the FP sensor was subjected to curvature. The FP cavity with shorter length presented low sensitivity to curvature. 展开更多
关键词 Curvature measurement fabry-perot interferometer optical fiber sensor
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Sinusoidal Phase-Modulating Fabry-Perot Interferometer for Angular Displacement Measurement 被引量:1
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作者 Caini Zhang, Xiangzhao Wang Shanghai Institute of Optics and Fine Mechanics, CAS, P. R. China, Tel: 86-21-59911191, Fax: 86-21-59532831 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期821-822,共2页
In this paper, a sinusoidal phase-modulating Fabry-Perot interferometer is proposed to measure angular displacement. The usefulness of the interferometer is demonstrated by simulations and experiments.
关键词 for IS in In Sinusoidal Phase-Modulating fabry-perot interferometer for Angular Displacement Measurement of that HIGH
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Study of the Sensing Characteristics of Irradiated Fiber Bragg Gratings and Fabry-Perot Interferometers Under Gamma Radiation 被引量:1
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作者 Zhuoyue LI Zengling RAN +7 位作者 Xianguo QING Zhengxi HE Yaqin XIAO Tingting YANG Xiu HE Jialiang ZHU Peng HE Sijie XU 《Photonic Sensors》 SCIE EI CSCD 2022年第1期91-98,共8页
The sensing characteristics of irradiated fiber Bragg gratings(FBGs)and Fabry-Perot interferometers(FPIs)were investigated under a 2MGy dose of gamma radiation.The study found that the pressure sensitivity of FP senso... The sensing characteristics of irradiated fiber Bragg gratings(FBGs)and Fabry-Perot interferometers(FPIs)were investigated under a 2MGy dose of gamma radiation.The study found that the pressure sensitivity of FP sensors after irradiation was stable,while the temperature sensitivity of FBG sensors was unstable,and both wavelengths displayed a shift.These findings offer the possibility for the application of FP pressure sensors in the gamma radiation environments,and FBG sensors require further research to be suitable for application in the nuclear radiation environments. 展开更多
关键词 Fiber Bragg gratings fabry-perot interferometers gamma radiation
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Nanostrain Measurement Using Chirped Bragg Grating Fabry-Perot Interferometer 被引量:1
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作者 Ricardo M. SILVA Marta S. FERREIRA Jose L. SANTOS Orlando FRAZAO 《Photonic Sensors》 SCIE EI CAS 2012年第1期77-80,共4页
A simple nanostrain direct current (DC) measurement system based on a chirped Bragg grating Fabry-Perot (FP) structure is presented. The FP cavity, formed between the chirped fiber Bragg grating (CFBG) and the f... A simple nanostrain direct current (DC) measurement system based on a chirped Bragg grating Fabry-Perot (FP) structure is presented. The FP cavity, formed between the chirped fiber Bragg grating (CFBG) and the fiber end face, presents an aperiodic behavior due to the CFBG. A laser located in the fringe pattern slope is used to interrogate the sensing head. The optical power parameter is analyzed when strain is applied, for long and short period fringe pattern wavelengths, and sensitivities of-2.87 μW/με and-5.48μW/με are respectively obtained. This configuration presents a resolution of 70 ε. 展开更多
关键词 Optical fiber sensor fabry-perot interferometer chirped fiber Bragg grating
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The technique of detecting the laser-ultrasonic vector displacement with a confocal Fabry-Perot interferometer waves in a plate 被引量:1
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作者 PAN Yongdong QIAN Menglu(Institute of Acoustics, Tongji University Shanghai 200092) 《Chinese Journal of Acoustics》 2003年第1期33-40,共8页
Generally, a confocal Fabry-Perot interferometer is only able to detect the out-of-plane component of a displacement field; while the in-plane component often has the information about the material which cannot be fou... Generally, a confocal Fabry-Perot interferometer is only able to detect the out-of-plane component of a displacement field; while the in-plane component often has the information about the material which cannot be found in this out-of-plane component. In this paper, based on a confocal Fabry-Perot interferometer set-up for detecting the out-of-plane component of a laser generated acoustic field, a technique is developed to detect both the out-of-plane and in-plane displacement components simultaneously with a novel two-channel confocal Fabry-Perot interferometer. 展开更多
关键词 of on it as in The technique of detecting the laser-ultrasonic vector displacement with a confocal fabry-perot interferometer waves in a plate is with
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Photonic Crystal Fiber Fabry-Perot Interferometers With High-Reflectance Internal Mirrors
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作者 Rong FAN Yuanbin HOU Wei SUN 《Photonic Sensors》 SCIE EI CAS CSCD 2015年第2期97-101,共5页
We demonstrated an in-line micro fiber-optic Fabry-Perot interferometer with an air cavity which was created by multi-step fusion splicing a muti-mode photonic crystal fiber (MPCF) to a standard single mode fiber (... We demonstrated an in-line micro fiber-optic Fabry-Perot interferometer with an air cavity which was created by multi-step fusion splicing a muti-mode photonic crystal fiber (MPCF) to a standard single mode fiber (SMF). The fringe visibility of the interference pattern was up to 20 dB by reshaping the air cavity. Experimental results showed that such a device could be used as a highly sensitive strain sensor with the sensitivity of 4.5 pm/με. Moreover, it offered some other outstanding advantages, such as the extremely compact structure, easy fabrication, low cost, and high accuracy. 展开更多
关键词 Fiber-optic sensors fabry-perot interferometer photonic crystal fiber strain measurement
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Recent Progress in Multiparameter Measurement Based on Extrinsic Fiber-Optic Fabry-Perot Interferometers and Fiber Gratings
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作者 Yun Jiang Rao Department of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期837-838,共2页
This paper presents a review of recent progress in simultaneous measurement of multiparameters including strain, temperature, vibration, transverse load, based on the combinations of extrinsic fiber-optic Fabry-Perot ... This paper presents a review of recent progress in simultaneous measurement of multiparameters including strain, temperature, vibration, transverse load, based on the combinations of extrinsic fiber-optic Fabry-Perot interferometers and fiber gratings. 展开更多
关键词 EFPI AS FBG Recent Progress in Multiparameter Measurement Based on Extrinsic Fiber-Optic fabry-perot interferometers and Fiber Gratings in on
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A novel time-to-live countdown scheme based on asymmetric Mach-Zehnder interferometer and Fabry-Perot semiconductor optical amplifier
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作者 庞莹 邱昆 +1 位作者 凌云 张薇 《Chinese Optics Letters》 SCIE EI CAS CSCD 2007年第2期66-68,共3页
We propose a novel optical time-to-live (TTL) processing scheme using asymmetric Mech-Zehnder inter-ferometer (AMZI) and Fabry-Perot semiconductor optical amplifier (FP-SOA). AMZI transfers M TTL pulses into M-1... We propose a novel optical time-to-live (TTL) processing scheme using asymmetric Mech-Zehnder inter-ferometer (AMZI) and Fabry-Perot semiconductor optical amplifier (FP-SOA). AMZI transfers M TTL pulses into M-1 pulses and two residual pulses with 6-dB power difference. FP-SOA enhances the power difference between the M - 1 pulses to the residual pulses to more than 10 dB. A numerical model is established for verifying the feasibility of this scheme. 展开更多
关键词 SOA OFC TTL OER A novel time-to-live countdown scheme based on asymmetric Mach-Zehnder interferometer and fabry-perot semiconductor optical amplifier FP time
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Characterization of Miniature Fiber-Optic Fabry-Perot Interferometric Sensors Based on Hollow Silica Tube 被引量:1
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作者 Pinggang JIA Guocheng FANG Daihua WANG 《Photonic Sensors》 SCIE EI CAS CSCD 2016年第3期193-198,共6页
A miniature fiber-optic Fabry-Perot interferometer (MOFPI) fabricated by splicing a hollow silica tube (HST) with inner diameter of 4 μm to the end of a single-mode fiber is investigated and experimentally demons... A miniature fiber-optic Fabry-Perot interferometer (MOFPI) fabricated by splicing a hollow silica tube (HST) with inner diameter of 4 μm to the end of a single-mode fiber is investigated and experimentally demonstrated. The theoretical relationship between the free spectrum range and the length of HST is verified by fabricating several MOFPIs with different lengths. We characterize the MOFPIs for temperature, liquid refractive index, and strain. Experimental results show that the sensitivities of the temperature, liquid refractive index, and strain are 16.42μm/℃, -118.56dB/RIU, and 1.21 pm/με, respectively. 展开更多
关键词 Fiber-optic fabry-perot interferometer hollow silica tube CHARACTERIZATION
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Reconstruction of Fabry–Perot cavity interferometer nanometer micro-displacement based on Hilbert transform 被引量:1
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作者 Hongwei Liang Yu Sun +3 位作者 Zhen Huang Chunlei jiang Zihua Zhang Lingling Kan 《Chinese Optics Letters》 SCIE EI CAS CSCD 2021年第9期13-17,共5页
A novel reconstruction method of nanometer micro-displacement of Fabry-Perot(F-P)interference is proposed in this study.Hilbert transforms are performed for F-P interference fringes,and the obtained signal performs ta... A novel reconstruction method of nanometer micro-displacement of Fabry-Perot(F-P)interference is proposed in this study.Hilbert transforms are performed for F-P interference fringes,and the obtained signal performs tangent operation with the original signal.Finally,the validity of the proposed algorithm and the structure are verified by simulation and several experimental measurements for vibration.Results from the experiments show that the maximum relative error is 4.9%. 展开更多
关键词 displacement reconstruction phase unwrapping fabry-perot interferometer
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