Design, development and characterization of a DFB (distributed feedback) laser diode control system

The main goal of this work deals on the design and implementation of a programmable controller that allows the operation of a DFB within certain restrictions. This type of laser diode must work under strict stability requirements of both temperature and current. The systems that are part of the controller were implemented independently following different control strategies. Their parameter´s program were autonomously configured either with a console attached to the board or through an external interface. The programming flexibility leads to an innovative possibility to work with almost any DFB device. Furthermore, considering its small size, it could be suitable to be used inside of an optical sensor system. These characteristics are very important because currently there are no controllers with such versatility. The control system performance was evaluated using an OFRR (Optical Fiber Ring Resonator). The results obtained in this high-sensibility optical test, has allowed characterizing the optical response of the system in relation to perturbations introduced with temperature variations.