Ultrafast electrooptical switching and regenerative conversion using semiconductor optical amplifiers

Author(s)

Napoleão dos Santos Ribeiro

• Document type: Doctoral Thesis
• Press: Campinas, SP. , ilustrações.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Elétrica e de Computação
• Defense date: 2009-10-22

Examining board members

Evandro Conforti; Maria Thereza Miranda Rocco Giraldi; Antonio Sergio Bezerra Sombra; Carlos Henrique de Brito Cruz; Aldário Chrestani Bordonalli

• Advisor: Evandro Conforti; Cristiano de Mello Gallep
• Field of knowledge: Engineering - Electrical Engineering
• Indexed in: Base Acervus-UNICAMP; Biblioteca Digital da UNICAMP
• Location: Universidade Estadual de Campinas. Biblioteca Central Cesar Lattes; T/UNICAMP; R354c

Abstract

Electrooptical switches, optical regenerators, and wavelength converters are relevant devices for the operation of future optical networks. In this work, measurements and simulations of an electrooptical switching time reduction technique based on multipulse current injection in semiconductor optical ampli.ers (SOA) are presented. Using the simulation results, the best SOA current signal formats, as well as possible improvements in the SOA equivalent circuit to achieve a higher switching time reduction are analyzed, resulting in predictions of switching time values around 300 ps for a 26 dB-optical contrast. In addition, a simple 2R-regenerator (reampli.cation and reshaping) and wavelength converter using just one SOA is presented. This device presented e¢ cient regeneration results for di¤erent deterioration cases at bit rates up to 13.5 Gbps within a wavelength conversion range of some nanometers. Further, this device presented low dependence with the relative optical input signal polarization and feasible integration to other devices. Finally, simulated results for the implementation of a feed-forward technique jointly with multipulse current injection in SOA are discussed. (AU)