Integrated Dynamic Wavelength Division Multiplexed FBG Sensor Interrogator on a Silicon Photonic Chip
- Resource Type
- Periodical
- Authors
- Marin, Y.E.; Celik, A.; Faralli, S.; Adelmini, L.; Kopp, C.; Pasquale, F.D.; Oton, C.J.
- Source
- Journal of Lightwave Technology J. Lightwave Technol. Lightwave Technology, Journal of. 37(18):4770-4775 Sep, 2019
- Subject
- Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Fiber gratings
Arrayed waveguide gratings
Sensors
Photonics
Bandwidth
Couplers
Fiber Bragg gratings (FBGs)
fiber sensors
high-volume manufacturing services
silicon on insulator
silicon photonics
waveguides
wavelength division multiplexing
wavelength meters
- Language
- ISSN
- 0733-8724
1558-2213
A wavelength division multiplexed fiber Bragg grating (FBG) sensor 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 μ ϵ at 1-kHz bandwidth.