☆ 4.7 Article

Integrated FBG Sensors Interrogation Using Active Phase Demodulation on a Silicon Photonic Platform

JOURNAL OF LIGHTWAVE TECHNOLOGY (2017)

期刊

JOURNAL OF LIGHTWAVE TECHNOLOGY

卷 35, 期 16, 页码 3374-3379

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

DOI: 10.1109/JLT.2016.2598395

关键词

Fiber Bragg Gratings (FBGs); Fiber sensors; high-volume manufacturing services; silicon on insulator; waveguides; wavelength meters; wavelength division multiplexing

类别

Engineering, Electrical & Electronic Optics Telecommunications

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Reagent

摘要

The authors experimentally demonstrate the feasibility of interrogating Fiber Bragg Grating (FBG) sensors using an integrated unbalanced Mach-Zehnder Interferometer and active phase demodulation on silicon-on-insulator platform. The use of an external arrayed waveguide grating at the output of the circuit allows the interrogation of multiple FBGs through wavelength division multiplexing. Signal processing employing the phase-generated carrier demodulation technique is used to extract the wavelength shift from the signal patterns, allowing accurate dynamic FBG interrogation. The performance of the proposed integrated FBG interrogator is validated by comparing it with a commercial FBG readout unit based on a spectrometer and used as a reference. Experimental results demonstrate a dynamic strain resolution of 72.3 n epsilon/root Hz.

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