Resumo

MUNOZ-ORTIZ, Rafael Oswaldo; CELY-MANCIPE, Manuel Arturo; PUERTO-LEGUIZAMON, Gustavo Adolfo  e  SUAREZ-FAJARDO, Carlos Arturo. Signal Generation for Radio Over Fibre Systems Based on Optical Combination. Ing. invest. y tecnol. [online]. 2015, vol.16, n.4, pp.585-598. ISSN 2594-0732.

This paper presents a comparative study of the signal generation techniques for the transport of information in Radio over Fiber (RoF) systems by using optical combination techniques. In these systems, the radio frequency carriers are conveyed as optical subcarriers over a link in a point-to-point or point-to-multipoint connectivity paradigm. This study is focused on three different generation techniques: double arm, parallel and serial generation. An analytical model to describe the elements, the configuration and the processes involved in the RoF signal generation is defined for each one of them. Subsequently, a modeling of the obtained electrical field functions allows assessing the quality of the generated signals based on the modulation depth. Results show that while there is a trade-off between the modulation depths of both signals for the double arm and serial configuration, the parallel technique relaxes the establishment of different modulation depths. An optimum configuration that guarantees a good quality for the generated signals is found for each generation technique.

Palavras-chave : microwave photonics; modulation depth; interferometer modulator; optical modulation; radio over fibre.