In this paper, design and simulations of an optoelectronic circuit for the conversion of the optical signal, coming from an interrogation system for FBG sensors, into a digital signal, is presented. The approach is divided into an optical introduction of the interrogation system, an analog section and, finally, digital considerations. The analog processing part is mainly based on the realization of a double stage transimpedance amplifier to obtain, in the working conditions, the best performances required in terms of high gain and wide bandwidth. The output voltage from the analog section is then converted to digital via a 12-bit ADC and sent to an FPGA that processes the defined algorithm in order to obtain the needed optical-electrical linear conversion. The circuit simulations, digital stability and other consideration, including the stability to optical power variability obtained by the numerically simulated interrogation system, are performed, highlighting the peculiarities of this new type of high frequency FBG interrogator.
Simulation of an Optical-to-Digital Converter for High Frequency FBG Interrogator / Marrazzo, V. R.; Fienga, F.; Riccio, M.; Maresca, L.; Irace, A.; Breglio, G.. - 627:(2020), pp. 259-265. [10.1007/978-3-030-37277-4_30]
Simulation of an Optical-to-Digital Converter for High Frequency FBG Interrogator
Marrazzo V. R.
;Fienga F.;Riccio M.;Maresca L.;Irace A.;Breglio G.
2020
Abstract
In this paper, design and simulations of an optoelectronic circuit for the conversion of the optical signal, coming from an interrogation system for FBG sensors, into a digital signal, is presented. The approach is divided into an optical introduction of the interrogation system, an analog section and, finally, digital considerations. The analog processing part is mainly based on the realization of a double stage transimpedance amplifier to obtain, in the working conditions, the best performances required in terms of high gain and wide bandwidth. The output voltage from the analog section is then converted to digital via a 12-bit ADC and sent to an FPGA that processes the defined algorithm in order to obtain the needed optical-electrical linear conversion. The circuit simulations, digital stability and other consideration, including the stability to optical power variability obtained by the numerically simulated interrogation system, are performed, highlighting the peculiarities of this new type of high frequency FBG interrogator.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
