Wavelength demodulation based on balance structure of PZT stack and reference gratings

Zhenwu Guo; Guangwei Liu; Weixiang Li

doi:10.1117/12.970613

15 October 2012 Wavelength demodulation based on balance structure of PZT stack and reference gratings

Zhenwu Guo, Guangwei Liu, Weixiang Li

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 841711 (2012) https://doi.org/10.1117/12.970613
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

A wavelength demodulation system of fiber Bragg grating (FBG) sensors based on wavelength scanning mode by the combination of the piezoelectric transducer(PZT) stack and the fiber Bragg grating has been presented. Two U-shaped metal brackets are set to the ends of the PZT stack. Two fibers with Bragg gratings as the reference gratings are stuck on the two sides of the U-shaped metal brackets respectively, and the parts of the gratings on the fibers are just located in the gap between two metal brackets. The equal prestressing force was imposed on the fibers and held constantly before sticking the fibers. This structure will expand the scan scope of reference grating, balance the tension of the PZT stack, strengthen the operation reliability, and improve the scan linearity. The experiment results show a good linear relationship between voltage and wavelength shift in the voltage scope of 0~200V, and the wavelength scope of linear tuning is about 3.8nm with the sensitivity of 0.0097nm/V.

Citation Download Citation

Zhenwu Guo, Guangwei Liu, and Weixiang Li "Wavelength demodulation based on balance structure of PZT stack and reference gratings", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 841711 (15 October 2012); https://doi.org/10.1117/12.970613

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