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Research on 3D FBG accelerometer and demodulation method

Chinese Optics Letters 2014年第A1期12卷 149-153页

作者：南秋明宋蕾 National Engineering Laboratory for Fiber Optic Sensing Technology Wuhan University of Technology Wuhan 430070 China Key Laboratory of Fiber Optic Sensing Technology and Information Processing Ministry of Education Wuhan University of Technology Wuhan 430070 China School of Electronic and Information Engineering LiaoNing University of Science and Technology Anshan 114021 China

In order to meet the requirements of vibration monitoring of large mechanical equipment, the authors design a novel three-dimensional （3D） high-frequency fiber Bragg grating （FBG） accelerometer. First, the operation principle of the sensor is introduced; the theoretical calculation and finite element analysis are performed about its structural parameters in this paper. Second, an FBG demodulation method for vibration signal is studied and a compensation method is put forward to measure the error caused by fluctuation of the light source and line loss. Finally, sensing properties such as amplitude frequency characteristics, sensitivity of the sensor, crosstalk coefficient, space acceleration measurement are tested, and the compensation method for measurement error is validated. The results show that the operating frequency bandwidth of the transducer is 10500 Hz, sensitivity is about 1400 my/g, crosstalk coefficient is larger than 20.6 dB, and the maximum measurement error of space acceleration is 4.8%, the compensation error is less than 5%. Hence, the sensor is used to monitor the vibration state of mechanical equipment.

关键词： 230.0230 Optical devices 250.0250 Optoelectronics 260.0260 Physical optics

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Transformation of metallic photonic structures from nano-hole to nano-island arrays through annealing process

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Chinese Optics Letters 2012年第B6期10卷 190-192页

作者：刘红梅庞兆广翟天瑞张新平 College of Applied Sciences Beijing University of Technology Beijing 100124 China College of Physics Science and Information Engineering Hebei Normal University Shijiazhuang 050024 China

Large-area metallic photonic crystals （MPCs） consist of two-dimensional （2D） periodical arrays of gold nano-holes are fabricated by solution-processible gold nanoparticles using interference lithography in com- bination with subsequent lift-off and annealing processes. By controlling the annealing temperature, the 2D nano-hole arrays are transformed into nano-island arrays, enabling easy achievements of two different photonic devices. The microscopic characterization shows convincingly the success of tile fabrication tech- niques and verifies our proposed mechanisms for this kind of nanoscale morphology transformation. This kind of mechanisms can be applied extensively in the metallic nanofabrication and in the realization of plasmonic photonic devices.

关键词： 250.0250 Optoelectronics 100.6640 Superresolution 210.4770 Optical recording 180.1790 Confocal microscopy

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Optic-electronic aims coordinate switch and orientation research based on many vehicle systems

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Chinese Optics Letters 2014年第A2期12卷 132-136页

作者：陈兆兵曹立华陈宁王兵庄昕宇 Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China

An integer coordinate commutation project is advanced which leads the aim angle information form optic-electronic detecting system to aim map orientation system and then to countermine system under the middle precision GPS orientation section. This way can we solve the difficult problem that the warning aims coordinate commutation among many optic-electronic vehicle systems. The aim orientation is realized by neat matrix principle. First, the 12 coordinate systems of optic-electronic detecting vehicle system and laser countermine system are defined. Then, the aim coordinate transform mode is changed from the warning system to the countermine system. It seems that this mode can satisfy the ＂360＂ error request of the two vehicle optic electronic system aim coordinate leading orientation under the complexion of without regarding to the relatively position and angle of the optic electronic detecting vehicle and laser countermine vehicle.

关键词： 250.0250 Optoelectronics 200.0200 Optics in computing

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