High performance fiber optic sensor based on self referenced FBGs and high-speed dual-wavelength pulse coding

Farhan Zaidi; Tiziano Nannipieri; Fabrizio Di Pasquale

doi:10.1117/12.2184148

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1 July 2015 High performance fiber optic sensor based on self referenced FBGs and high-speed dual-wavelength pulse coding

Farhan Zaidi, Tiziano Nannipieri, Fabrizio Di Pasquale

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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96553R (2015) https://doi.org/10.1117/12.2184148
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

We propose and experimentally demonstrate the feasibility of a highly efficient FBG-based quasi-distributed sensing system employing dual-wavelength cyclic pulse coding. Significant improvement in the measurement range, resolution and TDM multiplexing capabilities can be achieved, as well as crosstalk reduction with respect to a single wavelength TDM-based FBG interrogation scheme. The mechanism of noise reduction by quasi-periodic cyclic coding is experimentally demonstrated, pointing out significant improvement in accuracy with respect to dual-wavelength single pulse TDM-based FBG interrogation. The proposed technique can also enhance the sensing range of hybrid fiber optic sensor systems in which continuous monitoring of distributed and discrete points are simultaneously measured over the same sensing fiber.

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Farhan Zaidi, Tiziano Nannipieri, and Fabrizio Di Pasquale "High performance fiber optic sensor based on self referenced FBGs and high-speed dual-wavelength pulse coding", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553R (1 July 2015); https://doi.org/10.1117/12.2184148

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