A Low-cost Portable Interrogator for Dynamic Monitoring of Wavelength-Based Sensors

Abstract This paper proposes a low-cost portable interrogator for dynamic monitoring of wavelength-based fiber-optic sensors such as fiber Bragg gratings (FBGs) and Fabry-Perrot interferometers (FPIs). The is based on compact solution involving broadband light source the spectral convolution between sensor tunable filter. filtered signal then acquired by photodetector where optical-electrical conversion happens. Additionally, microcontroller performs three actions: (i) controls filter tuning, (ii) acquires signal, (iii) sends data to single-board computer (SBC). Lastly, SBC further processing displays graphical user interface. choice hardware software development combined allows lost-cost that supports four channels simultaneously, real-time operation, compatibility with Windows Linux-based operating systems, inputs processing, wireless communication low latency, portability.