Contribucions a l'optimització dels sistemes de test i caracterització de drivers electrònics per diodes láser
- Autores: Ramón Borràs Cristòfol
- Directores de la Tesis: Joaquín del Río Fernández (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2019
- Idioma: español
- Tribunal Calificador de la Tesis: Xavier Jordá Sanuy (presid.), Castro Gomariz (secret.), Juan de Dios Roldán Montiel (voc.)
- Programa de doctorado: Programa de Doctorado en Ingeniería Electrónica por la Universidad de las Illes Balears y la Universidad Politécnica de Catalunya
- Materias:
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- Resumen
The main objective of the research carried out in this doctoral thesis has been to improve the testing procedures and the characterization systems for laser diodes optical response. The research has been focused in the study of the laser diodes response dependency on temperature and its proper characterization system. The result is a proposal of a modelling method for the optical output power response of the laser diodes and the related programmed models in computer simulation environment. This simulation environment has been Pspice.
The proposal of the modelling method includes: - the model of the optical output power characteristic versus the injected current, that allows to include its temperature dependency, - the study of how is the dependence on temperature of the parameters that define the model, - the formulation of the corresponding mathematical models, - modelling and programming in the Pspice simulation environment, - and finally, the proposal of a characterization method to measure the optical response of the laser diode.
The characterization method is proposed so that the measurement of the parameters that define the temperature model is not affected by the heating due to the current injection, which is necessary for its operation.
This has been the biggest difficulty of this research, to propose a method where the measurements of the parameters that define the temperature response were not affected by the warming of the diode when operating, since it would invalidate its measurement and the obtained temperature model. It is called cold measurement method.
In the model proposal of the optical response of laser diodes and their dependence on temperature, some hypotheses are assumed regarding the model and its parameters. The hypotheses are made in relation to model's validity in the different ranges of power of the laser diodes. These hypotheses are confirmed throughout the research and with the measurements in diodes of different power.
Other contributions derived from the research are the commented proposal of a system for characterization of the optical response of the laser diodes at a certain temperature, independent of the heating of the diode or cold measure, and the used setup for the temperature measurement and supervision. Additionally, the proposal of an automatic characterization system of the laser diodes response and the related temperature model of their optical output power.
