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Proceedings Paper

High speed, high performance, portable, dual-channel, optical fiber Bragg grating (FBG) demodulator
Author(s): Hongtao Zhang; Zhanxiong Wei; Lingling Fan; Pengfei Wang; Xilin Zhao; Zhenhua Wang; Shangming Yang; Hong-Liang Cui
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Paper Abstract

A high speed, high performance, portable, dual-channel, optical Fiber Bragg Grating demodulator based on fiber Fabry- Pérot tunable filter (FFP-FT) is reported in this paper. The high speed demodulation can be achieved to detect the dynamical loads of vehicles with speed of 15 mph. However, the drifts of piezoelectric transducer (PZT) in the cavity of FFP-FT dramatically degrade the stability of system. Two schemes are implemented to improve the stability of system. Firstly, a temperature control system is installed to effectively remove the thermal drifts of PZT. Secondly, a scheme of changing the bias voltage of FFP-FT to restrain non-thermal drifts has been realized at lab and will be further developed to an automatic control system based on microcontroller. Although this demodulator is originally used in Weight-In- Motion (WIM) sensing system, it can be extended into other aspects and the schemes presented in this paper will be useful in many applications.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75034U (5 October 2009); doi: 10.1117/12.834219
Show Author Affiliations
Hongtao Zhang, Stevens Institute of Technology (United States)
Zhanxiong Wei, Stevens Institute of Technology (United States)
Lingling Fan, Stevens Institute of Technology (United States)
Pengfei Wang, Stevens Institute of Technology (United States)
Xilin Zhao, Yantai Univ. (China)
Zhenhua Wang, Yantai Univ. (China)
Shangming Yang, Yantai Univ. (China)
Hong-Liang Cui, Stevens Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors

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