Proposta de um algoritmo embarcado de tempo real para correção de transientes temporais em amplificadores ópticos

Abstract

For a good performance of an Optical Amplifier, it is necessary that its amplification is controlled in an optimized way so that possible equipment such as measuring photodetectors are not damaged. Many works found in the literature address the gain control problem of an Optical Amplifier through the construction of PID algorithms on embedded platforms. The main problems with these implementations lie in the way the controllers are designed from existing libraries, which makes the tuning process a late and expensive task. In this work, we implemented an embedded real-time algorithm capable of providing the best control response and gain adjustment for temporal transients applied in Optical Amplifiers. As it is a versatile algorithm, different configurations of the PID controller were verified in order to obtain different results through the placement of poles and zeros in complex plane. The response of an EDFA Optical Amplifier was simulated on a FRDM-KL46Z board so that the developed algorithm, which is found on a FRDM-KL25Z board, acts in closed loop and provides feedback for the proposed control system. Finally, the results obtained on the oscilloscope are compared with the model designed in MATLAB for controller validation.For a good performance of an Optical Amplifier, it is necessary that its amplification is controlled in an optimized way so that possible equipment such as measuring photodetectors are not damaged. Many works found in the literature address the gain control problem of an Optical Amplifier through the construction of PID algorithms on embedded platforms. The main problems with these implementations lie in the way the controllers are designed from existing libraries, which makes the tuning process a late and expensive task. In this work, we implemented an embedded real-time algorithm capable of providing the best control response and gain adjustment for temporal transients applied in Optical Amplifiers. As it is a versatile algorithm, different configurations of the PID controller were verified in order to obtain different results through the placement of poles and zeros in complex plane. The response of an EDFA Optical Amplifier was simulated on a FRDM-KL46Z board so that the developed algorithm, which is found on a FRDM-KL25Z board, acts in closed loop and provides feedback for the proposed control system. Finally, the results obtained on the oscilloscope are compared with the model designed in MATLAB for controller validation.