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Chinese Journal of Quantum Electronics
Contents
2016
Volume: 33 Issue 3
21 Article(s)
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 1 (2016)
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Millimeter wave compressed sensing imaging based on frequency selective surface
CHENWenbo , Jiajun BAI, and Yunqi FU
Based on frequency selective surface (FSS) structure, a millimeter wave compressed sensing imaging method is proposed, which provides the research approach for hardware realization of compressed sensing imaging. By loading switching diodes into FSS and making them on/off randomly, a new random-switching millimeter wave
Based on frequency selective surface (FSS) structure, a millimeter wave compressed sensing imaging method is proposed, which provides the research approach for hardware realization of compressed sensing imaging. By loading switching diodes into FSS and making them on/off randomly, a new random-switching millimeter wave imaging mask is simulated and designed. The mask designed is put on a millimeter wave antenna. The corresponding random measurement matrix can be constructed and enough effective measurement times can be obtained. Combined with compressed sensing theory, the imaging simulation experiments are completed by using reconstruction algorithm. Results confirm feasibility of the method proposed, and reconstruction of the original images can be achieved in the case of lower sampling rate..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 257 (2016)
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Finite symmetry group solutions to generalized variable coefficient (3+1)-D nonlinear Schrdinger equation
Xinxing HAO, and Biao LI
Based on the extending symmetry group approach and symbolic computation, some finite symmetry group solutions of the nonlinear Schrdinger (NLS) equations with various variable coefficients are investigated. On the basis of the extending symmetry group, determining equations are discussed in three kinds of cases, then
Based on the extending symmetry group approach and symbolic computation, some finite symmetry group solutions of the nonlinear Schrdinger (NLS) equations with various variable coefficients are investigated. On the basis of the extending symmetry group, determining equations are discussed in three kinds of cases, then six kinds of symmetry transformations are constructed and the relations between the standard (3+1)-D NLS equation and (3+1)-D variable coefficient NLS equations are derived. By using these symmetry transformations, rich exact solutions of some (3+1)-D variable coefficient NLS equations are obtained from the standard (3+1)-D NLS equation..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 263 (2016)
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Lie symmetry analysis and exact solutions for nonlinear LC circuit equation
Kaihui LI, and Hanze LIU
Lie symmetry analysis, G′/G-expansion and power series methods are performed for nonlinear LC circuit equation. The symmetries for the equation are given by Lie symmetry analysis. Combining Lie symmetry analysis, homogeneous balance principle and G′/G-expansion method, all of the G′/G solutions to the nonlinear LC circ
Lie symmetry analysis, G′/G-expansion and power series methods are performed for nonlinear LC circuit equation. The symmetries for the equation are given by Lie symmetry analysis. Combining Lie symmetry analysis, homogeneous balance principle and G′/G-expansion method, all of the G′/G solutions to the nonlinear LC circuit equation are obtained. Exact power series solutions of the nonlinear LC circuit equation are provided..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 279 (2016)
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Exact solutions for (2+1)-dimensional ZK-MEW equation with modified simple equation method
Juan YANG, and FENGQingjiang
Exact solutions of (2+1)-dimensional ZK-MEW equation are obtained with the improved simple equation method, including hyperbolic and trigonometric function solutions. When the special values of parameters in hyperbolic function solutions are given, the solitary wave solutions can be obtained. When the special values of
Exact solutions of (2+1)-dimensional ZK-MEW equation are obtained with the improved simple equation method, including hyperbolic and trigonometric function solutions. When the special values of parameters in hyperbolic function solutions are given, the solitary wave solutions can be obtained. When the special values of parameters in trigonometric function solutions are given, the periodic wave solutions can be obtained. Practice shows that simple equation method has a wide range of applications in optoelectronics, quantum optics, laser physics and plasma physics fields..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 287 (2016)
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Super-broad spectrum noise-like pulse fiber laser
HUJian , and Xianming ZHANG
An all-fiber super-broadband noise-like pulse mode-locked fiber laser is reported. To broaden the spectra of mode-locked pulses, the intra cavity dispersion management and nonlinear technology are adopted. There is small anomalous dispersion in the 58 m cavity, and the average dispersion coefficient is 0.12 ps/nm/km. T
An all-fiber super-broadband noise-like pulse mode-locked fiber laser is reported. To broaden the spectra of mode-locked pulses, the intra cavity dispersion management and nonlinear technology are adopted. There is small anomalous dispersion in the 58 m cavity, and the average dispersion coefficient is 0.12 ps/nm/km. The experiments achieve a super-broadband noise-like mode-locked pulse from 1300 nm to 1750 nm. Spectral 20 dB bandwidth reaches 362 nm, and 3 dB bandwidth reaches 102 nm. The spectrum bandwidth of the noise-like pulse greatly exceeds gain bandwidth of the erbium doped fiber..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 292 (2016)
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Optimizing performance ofKrF excimer laser by modifying active medium gas partial pressures
Hongsong QIU, Libing YOU, Qingsheng WANG, YINGuangyue , and Xiaodong FANG
Dependence of KrF excimer laser output energy on gas partial pressures of Ne, F2 and Kr is investigated, respectively. Collision processes related to Ne are analyzed theoretically and compared with that of other kinds of buffer gas. The output energy is extremely sensitive to the partial pressure of F2. The three body
Dependence of KrF excimer laser output energy on gas partial pressures of Ne, F2 and Kr is investigated, respectively. Collision processes related to Ne are analyzed theoretically and compared with that of other kinds of buffer gas. The output energy is extremely sensitive to the partial pressure of F2. The three body collision related to Kr is dominant in the discharge process. The pulse energy thus quadratically depends on the partial pressure of Kr. Maximum output energy of 807 mJ with an overall efficiency of 1.64% is achieved for the optimum gas mixture of F2:He:Kr:Ne = 0.315:5.985:19.5:305 kpa when the charging voltage is 28.7 kV..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 296 (2016)
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Performance improvement of LED photoelectric devices
Huilin YAO, Gang LU, Lijun SONG, and Bo WANG
Quantum efficiency of light emitting diodes(LED) is improved by redesigning the multiple quantum well of GaN based LED, and the reason for these improvements is researched by theoretical calculation in ways of electric field in quantum well, carrier distribution, electronic leakage and radiation coincidence efficiency.
Quantum efficiency of light emitting diodes(LED) is improved by redesigning the multiple quantum well of GaN based LED, and the reason for these improvements is researched by theoretical calculation in ways of electric field in quantum well, carrier distribution, electronic leakage and radiation coincidence efficiency. For LED optoelectronic devices, improving the radiative recombination efficiency is benefitial to releasing electron leakage, increasing luminous power of LED, releasing the efficiency drop of LED under high current. The designed construction adopts InGaN/GaN as the barriers of LEDs, which attributes to alleviation of the electrostatic field induced by polarization, increasing the overlap ratio of electrons and holes, and thus increasing the radiation recombination rate. The results show that under 160 mA injection current, the external quantum efficiency is improved by 20%..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 301 (2016)
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Influence of external magnetic field on micro-hollow cathode discharge
WANGJinmei , and Peichao ZHENG
Three-dimensional ensemble Monte Carlo model is employed using C programming language to investigate the impact of different cathode aperture sizes to micro-hollow cathode discharges. Results show that in argon under constant pressure and voltage, when an external magnetic field is added in a micro-hollow cathode disch
Three-dimensional ensemble Monte Carlo model is employed using C programming language to investigate the impact of different cathode aperture sizes to micro-hollow cathode discharges. Results show that in argon under constant pressure and voltage, when an external magnetic field is added in a micro-hollow cathode discharge, the distribution of electron density has not change much in cathode, and electron drift range reduces in the axial and lateral direction, and electron energy becomes lower. But the applied magnetic field has a less obvious effect on high-pressure micro-hollow cathode discharges than low-pressure discharges on the whole. The research results have a certain guiding significance on the mechanism of the micro-hollow cathode discharge plasma..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 306 (2016)
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Application of Raman fiber amplifier in remote sensing detection
MEIJiaoxu , Lei WANG, Tu TAN, Kun LIU, WANGGuishi , and Xiaoming GAO
Combining Raman fiber amplification technique with wavelength modulation technique for the first time, the power of near-infrared laser is amplified by Raman optical fiber amplifier, and the laser amplified is used for the long-distance remote detection of nature gas pipeline leak. Raman fiber amplifier performances ar
Combining Raman fiber amplification technique with wavelength modulation technique for the first time, the power of near-infrared laser is amplified by Raman optical fiber amplifier, and the laser amplified is used for the long-distance remote detection of nature gas pipeline leak. Raman fiber amplifier performances are tested at 1650 nm range. It’s found that when the output power of Raman fiber amplifier is Pout, f and Pout meet certain linear relationship in order to ensure non-deformation of the output signal. Based on it, 500 m long distance laser remote sensing detection is realized. It lays the foundation for research of laser remote sensing technology of natural gas leakage on airborne platform..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 311 (2016)
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Slow light pulse based on transitions between Zeeman sublevels of D1 line in rubidium atoms
Shuohan ZHAO, Kai LI, Qingqing QIN, and Kaijun JIANG
It is possible to observe slow light pulse based on transitions between Zeeman sub-levels of D1 line in rubidium atoms. In the experiment, when two laser beams with opposite circular polarizations (σ- and σ+), called probing light which is weak and coupling light which is strong respectively, couple transitions between
It is possible to observe slow light pulse based on transitions between Zeeman sub-levels of D1 line in rubidium atoms. In the experiment, when two laser beams with opposite circular polarizations (σ- and σ+), called probing light which is weak and coupling light which is strong respectively, couple transitions between Zeeman sub-levels of D1 line F=2→F′=1 in rubidium atoms, electromagnetically induced transparency (EIT) with reduced absorption and enhanced dispersion is achieved in the atomic medium and simultaneously results in slow light. Influence of the coupling light intensity and pulse width of the probe beam on reducing the group velocity is investigated. The delay of probe pulse increases continually when decreasing the coupling beam power, which indicates more significant reduction in group velocity. The optical pulse width is smaller, the ratio of the light pulse delay and pulse width is larger, and separation of reference and probe light is larger..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 317 (2016)
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Analysis of Raman scattering in multiplexed classical and quantum transmission channel system based on continuous variable
XUZhenyu , Yunxia LI, Lei SHI, Wen MENG, and Yiming JI
The multiplexed classical and quantum transmission was one of the key application technologies of quantum secret communications, which can solve the problem that quantum information and classical information need different optical fibers to transmit, and significantly reduce the application cost. Aiming at the scheme o
The multiplexed classical and quantum transmission was one of the key application technologies of quantum secret communications, which can solve the problem that quantum information and classical information need different optical fibers to transmit, and significantly reduce the application cost. Aiming at the scheme of multiplex continuous variable quantum key with classical information based on WDM technology, characteristics of Raman scattering noise in the system are analyzed quantitatively. Influence of Raman scattering noise on the system security key rate is studied by simulation under two different classical information transmission modes of forward and backward. Results show that the secure key rate in the forward classical transmission mode system is larger than that in the backward classical transmission mode system significantly. When the channel input power is fixed, the influence of Raman scattering noise on the security key rate is small in short range communication, and the influence is not negligible with increasing of the distance. When the communication distance is fixed, the additional noise in a certain numerical range has less influence on the system security key rate, and the value is 0.07N0 when the communication distance is 50 km..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 322 (2016)
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Efficient quantum sequential multi-signature protocol
Chengbin DU, Runhua SHI, Hong ZHONG, Jie CUI, Shun ZHANG, and Yan XU
Based on quantum one-time pad and quantum key distribution, a quantum sequential multi-signature protocol of classic message is proposed. Different from known quantum sequential multi-signature protocols, the signature can be accomplished only by unitary operation of single photon instead of multi-particle entangled st
Based on quantum one-time pad and quantum key distribution, a quantum sequential multi-signature protocol of classic message is proposed. Different from known quantum sequential multi-signature protocols, the signature can be accomplished only by unitary operation of single photon instead of multi-particle entangled states. The protocol has high flexibility, and it is easy to implement the addition and deletion of the signer. Security of the protocol proposed mainly depends on the unconditional security of quantum key distribution. The existing various attacks on this agreement is also invalid. Compared with other well-known quantum sequential multi-signature protocols, efficiency of the protocol signature and verification process is greatly improved..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 329 (2016)
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Interaction of optical fiber solitons in distributed PT-symmetric nonlinear couplers
Ruiyu HAO
In order to discuss the stability and interaction of optical fiber solitons in application devices, linearly coupled nonlinear Schrdinger (NLS) equations with variable coefficients are investigated numerically. Results show that the weak soliton interaction exists in PT-symmetric nonlinear coupler with periodically di
In order to discuss the stability and interaction of optical fiber solitons in application devices, linearly coupled nonlinear Schrdinger (NLS) equations with variable coefficients are investigated numerically. Results show that the weak soliton interaction exists in PT-symmetric nonlinear coupler with periodically distributed dispersion and nonlinear parameters. There exists weak soliton interaction under different initial conditions, including two or three non-inverting input solitons with equal amplitude and three solitons with two inverting input solitons. Stability of the weak soliton interaction is discussed with finite initial perturbation. Results show that the main characteristics of weak soliton interaction can not be influenced by the finite initial perturbation..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 338 (2016)
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Application of widely tunable fiber laser in temperature sensing
Fei SHI, Hui ZHUO, Feng YU, Zhijun LIAO, and Xianming ZHANG
A programmable wavelength widely tunable Er-doped fiber laser is demonstrated. The wavelength scanning tunable range can cover above 51 nm (from 1516.8 nm to 1568.3 nm) controlled by software and tunable step is up to 0.01 nm. Wavelength repetition scanning tuning can be controlled by programming. The laser is applied
A programmable wavelength widely tunable Er-doped fiber laser is demonstrated. The wavelength scanning tunable range can cover above 51 nm (from 1516.8 nm to 1568.3 nm) controlled by software and tunable step is up to 0.01 nm. Wavelength repetition scanning tuning can be controlled by programming. The laser is applied to the optical fiber grating to form a quasi-distributed temperature sensing system, which is applied in real-time temperature monitoring of 48 points in 16 channels. Because of the high output power, the detecting distance can be very long. When the output power is 20 dBm and the sensitive is -20 dBm, the detecting distance of the temperature sensor is more than 50 km. The temperature sensing system has important application in smart grid sensing system..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 343 (2016)
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Characteristic observation of atmospheric aerosol extinction based on cavity ring-down spectroscopy
Xiao HUANG, Yanlin GUO, Yi HONG, Junguo DONG, Wei GAO, Mei LI, Zhengxu HUANG, Zhong FU, Ping CHENG, and Zhen ZHOU
Laser cavity ring-down spectrometers (CRDS) developed are used to investigate the aerosol light extinction and the influence caused by relative humidity during a long term experiment around Kunshan, Jiangsu. Observation results show that mean value of extinction coefficient is quite high, and a clear diurnal pattern is
Laser cavity ring-down spectrometers (CRDS) developed are used to investigate the aerosol light extinction and the influence caused by relative humidity during a long term experiment around Kunshan, Jiangsu. Observation results show that mean value of extinction coefficient is quite high, and a clear diurnal pattern is observed in extinction coefficient with maximum occurring at 7:00, dropping down to minimum at 17:00, then rising again, which is caused by the great influence of the surrounding heavily polluted areas and meteorological conditions. Results for the hydrophilic properties of atmospheric aerosol in the monitoring site show that atmospheric aerosol is hydrophilic type, and extinction coefficient is susceptible to the ambient relative humidity. The results have certain guiding significance for the further study of atmospheric aerosol properties of this area with aerosol mass spectrometry and other monitoring instruments..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 348 (2016)
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Refractive index sensing characteristics ofmicrodroplet-etched micro-nano fiber Fabry-Perot resonator
Bo LIU, Jie LI, Lipeng SUN, Long JIN, and Baiou GUAN
To achieve high accuracy and high sensitivity measurement of refractive index, an asymmetric micro-nano fiber Fabry-Perot resonator is fabricated using micron size hydrofluoric(HF)-acid droplet chemical etching method. The fabricated structure is featured with small size, low loss, large birefringence and high Q value.
To achieve high accuracy and high sensitivity measurement of refractive index, an asymmetric micro-nano fiber Fabry-Perot resonator is fabricated using micron size hydrofluoric(HF)-acid droplet chemical etching method. The fabricated structure is featured with small size, low loss, large birefringence and high Q value. The guided modes along the orthogonal polarizations present different refractive index (RI) responses. The measured RI sensitivities are 133.8 nm/RIU and 117.1 nm/RIU for the modes along the fast and slow axis, respectively. The temperature sensitivity is 0.012 nm/°C for the two polarization modes. The temperature independent refractive index measurement can be realized by monitoring the wavelength difference of two polarized light with spectrometer. Experiment investigation is carried out with optical fiber sensors with different FP cavity parameters. Results show that the smaller the cavity diameter of fiber FP sensor is, the higher the corrosion rate is, and the higher the refractive index sensitivity is..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 356 (2016)
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Characteristics of sensors based on all-solid-state photonic bandgap fiber
Mengmei GENG, Jie LI, and Lipeng SUN
In order to investigate characteristics of sensors based on all-solid-state photonic bandgap fiber (AS-PBF), a special optical fiber laser based on two-taper mode interference is prepared by fabricating two taper fibers in an AS-PBF on an interval with a splicer. Compared to the conventional single mode fibers or index
In order to investigate characteristics of sensors based on all-solid-state photonic bandgap fiber (AS-PBF), a special optical fiber laser based on two-taper mode interference is prepared by fabricating two taper fibers in an AS-PBF on an interval with a splicer. Compared to the conventional single mode fibers or index-guiding photonic crystals, AS-PBF has a lower effective index in the core and a higher effective index in the cladding. According to the theoretical analysis and experimental verification, the temperature and axial stress response of the structure are investigated. Results show that the measured sensing sensitivities are about 0.063 nm/°C for temperarure and -1.74 nm/N for the axial stress, respectively. Compared with the long-period grating and Bragg grating, a two-tapers modal interferometer based on all-solid photonic bandgap fiber has a much compact device size and a simple fabrication, and it has wide application prospects in the filed of optical fiber sensing..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 363 (2016)
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Investigation ofSagnac full optical fiber current sensor
Jing LIU, Youguo LUO, Peng DU, Zhijun LIAO, and Ke YAN
Based on Faraday and Sagnac effect, a full optical fiber current sensor (FOCS) is developed in order to monitor the current on transmission line. A Y-shape waveguide is inserted in light path and zigzag modulation signal is used creatively. Two-way reverse transmission light signals in the Sagnac loop appear decoherenc
Based on Faraday and Sagnac effect, a full optical fiber current sensor (FOCS) is developed in order to monitor the current on transmission line. A Y-shape waveguide is inserted in light path and zigzag modulation signal is used creatively. Two-way reverse transmission light signals in the Sagnac loop appear decoherence in Y-shape waveguide by adjusting the slope of zigzag wave signal, and the current can be calculated accurately. The current in range from 40 A to 140 A is measured. The experimental data is simulated linearly and the correlation coefficient reaches 0.9996. Results show that the experimental data are in good agreement with the actual current..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 368 (2016)
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Directional characteristics of dual frequencyinterferometric fiber laser acceleration sensor
Yongqiang ZHAO, Linghao CHENG, Feng ZHOU, LIANGYizhi , Long JIN, and Bai′ou GUAN
Vector sensors show great value in various applications because they can synchronously measure vector information such as vibration velocity, acceleration and so on in a single place with a certain level of ability for noise suppression. Erbium/Ytterbium co-doped fiber lasers can be employed to implement miniature, mul
Vector sensors show great value in various applications because they can synchronously measure vector information such as vibration velocity, acceleration and so on in a single place with a certain level of ability for noise suppression. Erbium/Ytterbium co-doped fiber lasers can be employed to implement miniature, multiplexing friendly and highly sensitive fiber sensors without the need for complicated demodulation schemes. For such kind of sensors, an accelerometer structure is proposed, which realizes a dual frequency interference based fiber grating laser vector sensor for acceleration through restrictions of the transversal movement of the mass in the structure. Besides those merits possessed by dual-polarization fiber lasers, it shows quite good directional characteristics in ′8′ shape with flat frequency response below 1 kHz, which presents an important reference for implementations of dual frequency interference based fiber vector sensors..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 372 (2016)
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Deformation measurement method based on optical inertial sensing
Changying RUI, and Lin HUANG
Ground deformation is effectively monitored insitu, and rules and trends of surface irregular subsidence are discovered. Thereby the sinking situation of the whole surface movement areas is determined. Micro inertial measurement unit (MIMU)and fiber grating sensors are used to build a distributed network for surface de
Ground deformation is effectively monitored insitu, and rules and trends of surface irregular subsidence are discovered. Thereby the sinking situation of the whole surface movement areas is determined. Micro inertial measurement unit (MIMU)and fiber grating sensors are used to build a distributed network for surface deformation data measurement. A new exponential type of wavelet algorithm combined time series analysis is proposed to carry out the wavelet threshold denoising processing for the data collected, and the denoising effect is obvious. Kalman filtering is used to forecast deformation trend of the deformable body. The results indicate that the data obtained by this method are accurate and effective. The method can be applied to engineering practice of terrain deformation forecast..
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Chinese Journal of Quantum Electronics
Publication Date: Jan. 01, 1900
Vol. 33, Issue 3, 378 (2016)
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