This project aims to achieve a direct method to stabilize the bandwidth performance of EDFL WDM (Wevelenght Division Multiplex) ring, using a Closed Loop Control System. The feedback path to close this loop is taken from the output of the system and applied in a device that will compensate for thermal and other non linear effects that occur on the system, improving the overall bandwidth performance of the modulation system. The results achieved on the theoretical analysis will them be applied on the physical actuator, controller and feedback path to ensure the real performance of of the modulation system. The results achieved on the theoretical analysis will them be applied on the physical actuator, controller and feedback path to ensure the real performance of the device, acting on an oscillator designed to simulate the frequency to temperature dependency of the real optical fiber system. Everything we have from this project will be provided here, free to use. Kicad V6 was used.