Michelson-Interferometer-Based All-Fiber Optical Perimeter Security System by Utilizing Binary Rectangular Pulse Phase Modulation

被引：0
|
作者：
Ren Z. [1 ,2 ]
Cui K. [2 ]
Li J. [1 ,2 ]
Zhu R. [1 ,2 ]
Deng S. [2 ,3 ]
机构：
[1] School of Electronic and Optical Engineering, Nanjing University of Scienceand Technology, Nanjing, 210094, Jiangsu
[2] Ministry of Industry and Information Technology, Key Laboratory of Advanced Solid Laser, NanjingUniversity of Scienceand Technology, Nanjing, 210094, Jiangsu
[3] School of Science, Nanjing University of Science and Technology, Nanjing, 210094, Jiangsu
来源：
Guangxue Xuebao/Acta Optica Sinica | 2017年 / 37卷 / 12期
关键词：
Fiber optics; Level crossing (LC); Michelson interferometer; Perimeter security; Phase signal demodulation;
D O I：
10.3788/AOS201737.1206004
中图分类号：
学科分类号：
摘要：
We use highly coherent and very low-noise laser as the light source to design fiber Michelson interferometers with an optical path difference of 60 m used as the front-end transducers. Binary rectangular pulse is used to modulate the phases of the light source, and the phase signals are restored with an orthogonal demodulation algorithm. A highly efficient interrogator controller based on field programmable gate array(FPGA) is used to calculate phase signals in real time. Real time and accuracy of invasion alarm signals are improved, based on the time-domain level crossing (LC) algorithm. Finally, a four-zone security system is set up, which has advantages of simple interrogator controller, low cost and real-time handling capability. The experimental results show that the system can alert all kinds of intrusions in real time and suppress the false alarm caused by the environmental noises, such as winds and rains, under the chosen proper threshold. The system has worked for 1 month without alarm failure and the false alarm rate is less than 1%. © 2017, Chinese Lasers Press. All right reserved.
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  • [1] Hocker G.B., Fiber-optic sensing of pressure and temperature, Applied Optics, 18, 9, pp. 1445-1448, (1979)
  • [2] Gerges A.S., Newson T.P., Jones J.D.C., Et al., High-sensitivity fiber-optic accelerometer, Optics Letters, 14, 4, pp. 251-253, (1989)
  • [3] Baere I.D., Luyckx G., Voet E., Et al., On the feasibility of optical fibre sensors for strain monitoring in thermoplastic composites under fatigue loading conditions, Optics and Lasers in Engineering, 47, 3-4, pp. 403-411, (2009)
  • [4] Wang D.Y., Wang Y., Gong J., Et al., Fully distributed fiber-optic temperature sensing using acoustically-induced rocking grating, Optics Letters, 36, 17, pp. 3392-3394, (2011)
  • [5] Zhang Y., Zhang J., Liu Z., Et al., Multimode fiber based temperature sensor with the capability of wavelength encoding, Acta Optica Sinica, 29, 2, pp. 327-330, (2009)
  • [6] Yuan L., Overview and forecast of fiber optic white-light interferometry, Acta Optica Sinica, 31, 9, (2011)
  • [7] Zhao Y., Rong M., Liao Y., Reflex optical fiber sensor and compensation technique for temperature measurement under offshore oil well, Chinese J Lasers, 30, 1, pp. 75-78, (2003)
  • [8] Gao C., Zhu S., Feng L., Et al., An all fiber laser for distributed optical fiber sensor, Chinese J Lasers, 37, 6, pp. 1501-1504, (2010)
  • [9] Yang Y., Wang H., Yang F., Et al., The polarization-supporting photonic crystal fiber hydrogen sensor based on Sagnac interferometer, Acta Optica Sinica, 34, 8, (2014)
  • [10] Fang N., Wang L., Tang Z., Progress of fiber-optic time-varying disturbance distributed sensing technology, Laser & Optoelectronics Progress, 47, 9, (2010)
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