High precision optical fiber Bragg grating demodulation system based on the source filtering for seismic detection

被引：0
|
作者：
Qiao X. [1 ,2 ]
Ding F. [1 ]
Jia Z. [1 ]
Song J. [1 ]
机构：
[1] Key Laboratory of Photoelectricity Gas-Oil Logging and Detecting, Xi'an Shiyou University, Xi'an
[2] Northwest University, Xi'an
来源：
Guangxue Xuebao/Acta Optica Sinica | 2010年 / 30卷 / 08期
关键词：
Edge filtering; Fiber light source; Fiber optics; Seismometer demodulation;
D O I：
10.3788/AOS20103008.2219
中图分类号：
学科分类号：
摘要：
The filtering demodulation is realized by using the good linear sideband near 1530 nm of the super-fluorescent fiber source. The light source of system adopts double-pass backward configuration, because the detecting sensitivity of light source decides the whole system's sensitivity. When the linear sideband is 2.5 nm, the sensitivity of power is -14.7 μW/nm, and the degree of fitting is 0.9995. The system uses all-optical structure to improve the demodulation speed. By the way of computer simulation, its detection sensitivity for the wavelength and strain separately are -1.27 pm/mV and 1.06 με. The results show that this demodulation system has high sensitivity, good stability, quick demodulation speed, and it can realize real-time detection of seismic wave.
引用
收藏
页码：2219 / 2223
页数：4
相关论文
共 13 条
  • [1] Nellen Ph.M., Mauron P., Frank A., Et al., Reliability of fiber Bragg grating based sensors for downhole applications, Sensors and Actuators. A, 103, 3, pp. 364-376, (2003)
  • [2] Henderson P.J., Fisher N.E., Jackson D.A., Arrent metering using fibre-grating based interrogation of a conventional arrent transformer, 12th International Conference on OFS, pp. 186-189, (1997)
  • [3] Qiao X., Wang Y., Fu H., Et al., High-accuracy real time calibration of tunable Fabry-Perot filter on large range, Acta Optica Sinica, 28, 5, pp. 852-855, (2008)
  • [4] Rao Y., Luo X., Ran Z., A 100 km fiber Bragg grating sensor system based on swept laser and optical amplification, Chinese J. Laser, 34, 5, pp. 680-683, (2007)
  • [5] Xiao H., Li F., Wang Y., Et al., High-resolution fiber laser sensor system, Chinese J. Lasers, 35, 1, pp. 87-91, (2008)
  • [6] Davis M.A., Kersey A.D., All fiber Bragg grating strain-sensor demodulation technique using a wavelength division coupler, Electron. Lett., 30, 1, pp. 75-77, (1994)
  • [7] Liu B., Tong Z., Chen S., Et al., A novel method of edge filter linear demodulation using long-period grating in fiber sensor system, Acta Optica Sinica, 24, 2, pp. 199-202, (2004)
  • [8] Zhou G., Zhao Q., Kai G., Et al., A novel edge filter demodulation method using high birefringence fiber Sagnac loop mirror, Journal of Optoelectronics. Laser, 14, 12, pp. 1245-1249, (2003)
  • [9] Sheng Q., Shi K., Gao L., Et al., Study on the method of matching detection of fiber grating vibration sensor, Acta Optica Sinica, 22, 7, pp. 847-851, (2002)
  • [10] Zhang J., Zhao H., Xiong Y., Et al., A FBG sensor demodulation method based on an amplified spontaneous emission light source, Chinese Journal of Scientific Instrument, 27, 1, pp. 102-105, (2006)
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