A wavelength division multiplexed fiber Bragg grating (FBG) sensors interrogator using an integrated unbalanced Mach–Zehnder interferometer followed by an arrayed waveguide grating on silicon-on-insulator platform is presented. The Bragg wavelength-shift is determined through the phase-generated carrier demodulation technique, allowing accurate dynamic FBG interrogation. The performance of the proposed device was validated by comparing the measurements with a commercial FBG readout unit based on a spectrometer, serving as a reference. Experimental results demonstrate a dynamic strain resolution of 4.56 nε/√Hz and minimum detectable strain down to ~0.49 µε at 1-kHz bandwidth.
Integrated Dynamic Wavelength Division Multiplexed FBG Sensors Interrogator on a Silicon Photonic Chip
Marin, Yisbel Eloisa
;Celik, Arda;Faralli, Stefano;Di Pasquale, Fabrizio;Oton, Claudio J.
2019-01-01
Abstract
A wavelength division multiplexed fiber Bragg grating (FBG) sensors interrogator using an integrated unbalanced Mach–Zehnder interferometer followed by an arrayed waveguide grating on silicon-on-insulator platform is presented. The Bragg wavelength-shift is determined through the phase-generated carrier demodulation technique, allowing accurate dynamic FBG interrogation. The performance of the proposed device was validated by comparing the measurements with a commercial FBG readout unit based on a spectrometer, serving as a reference. Experimental results demonstrate a dynamic strain resolution of 4.56 nε/√Hz and minimum detectable strain down to ~0.49 µε at 1-kHz bandwidth.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
