Innovative safety monitoring system based on fiber optic sensors technology compatible with 4-20mA standard

In this contribution an innovative, full analog, fiber optic sensors (FOS) interrogator is designed which, being fully compatible with the 4-20 mA standard of Programmable Logic Controller (PLC), enable integration FOS technology in safety framework, such as Detector Safety System (DSS) LHC Experiments. It composed by a analog electrical circuitry, capable to directly transduce signal coming from arrayed waveguide grating (AWG), into monotonic current range 4-20mA. first experimental analysis, temperature 50°C was detected, exhibiting output trend which can be fitted 3rd order polynomial equation over whole range. Furthermore, reduced 20°C, behaves linearly. The proposed system has potential integrated DSS experiments. Indeed, validation on field foreseen framework Compact Muon Solenoid experiment DSS.