1. Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Photonics Lab, Department of Electrical Engineering, Avenida Maracanã, 229, Rio de Janeiro 20271-110, Brazil
2. Instituto Militar de Engenharia, Photonics Lab, Department of Electrical Engineering, Praça General Tibúrcio, 80, Rio de Janeiro 22290-270, Brazil