30 May 2016 Integrated FBG sensors interrogator in silicon photonic platform using active interferometer monitoring
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Proceedings Volume 9916, Sixth European Workshop on Optical Fibre Sensors; 991626 (2016) https://doi.org/10.1117/12.2236901
Event: Sixth European Workshop on Optical Fibre Sensors (EWOFS'2016), 2016, Limerick, Ireland
Abstract
We experimentally demonstrate the feasibility of Fiber Bragg Grating sensors interrogation using integrated unbalanced Mach-Zehnder Interferometers (MZI) and phase sensitive detection in silicon-on-insulator (SOI) platform. The Phase- Generated Carrier (PGC) demodulation technique is used to detect phase changes, avoiding signal fading. Signal processing allows us to extract the wavelength shift from the signal patterns, allowing accurate dynamic FBG interrogation. High resolution and low cost chips with multiple interrogators and photodetectors on board can be realized by exploiting the advantages of large scale fabrication capabilities of well-established silicon based industrial infrastructures. Simultaneous dynamic reading of a large number of FBG sensors can lead to large volume market applications of the technology in several strategic industrial fields. The performance of the proposed integrated FBG interrogator is validated by comparing with a commercial FBG readout based on a spectrometer and used as a reference.
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Y. E. Marin, Y. E. Marin, T. Nannipieri, T. Nannipieri, F. Di Pasquale, F. Di Pasquale, C. J. Oton, C. J. Oton, } "Integrated FBG sensors interrogator in silicon photonic platform using active interferometer monitoring", Proc. SPIE 9916, Sixth European Workshop on Optical Fibre Sensors, 991626 (30 May 2016); doi: 10.1117/12.2236901; https://doi.org/10.1117/12.2236901
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