Process and device for optical sensor with electrical transduction using Bragg gratings and optical source having a tunable

摘要

Process and device for optical sensor with electrical transduction using Bragg gratings and tunable optical source. The present invention relates to a process of signal transduction to the optical domain electric and to a device for sensor in optical domain.The system includes laser diode with vertical cavity surface emission and by - VCSEL (vertical cavity surface emitting laser) single-mode, fibre optic Bragg gratings recorded at different wavelengths, two broadband detectors, and other components of the connection between the parties before Iores,The system uses a process of transduu00e7u00e1o sensor capable of detecting changes in the bars of Bragg, the sensor elements, by mark with the laser diode, which is made tunable by variation of injection current, the optical signal of the query takes to detective Producers and the current generated is standardised and correlated with the injection current of the laser.In this way, the physical changes of the grid are determined from this correlation, therefore in the electric field.