We experimentally demonstrate the feasibility of interrogating Fiber Bragg Grating (FBG) sensors using an integrated unbalanced Mach-Zehnder Interferometer (MZI) and active phase demodulation on silicon-on-insulator (SOI) platform. The use of an external arrayed waveguide grating (AWG) at the output of the circuit allows the interrogation of multiple FBGs through wavelength-division multiplexing (WDM). Signal processing employing the phase-generated carrier (PGC) 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 nε/√Hz.
|Titolo:||Integrated FBG Sensors Interrogation using Active Phase Demodulation on a Silicon Photonic Platform|
|Data di pubblicazione:||Being printed|
|Appare nelle tipologie:||1.1 Articolo su Rivista/Article|