The first Optoelectronics Week - SEMOPTO, in 1991, had as main purpose to provide researches, students and professionals involved in this technology an opportunity to exchange information. Since then, companies - such as CPqD/Telebrás, Telemig (Telemar), ABC-XTAL, CTBC (Grupo Algar), Fotônica, AsGa, Microeletrônica, AGC Optosystem, Shachin Cury, Lucent Technologies, Leucotron and institutions like CTA-ITA, Unicamp, Unesp, CETUC-RJ, CEFET-PR, UFMG and EFEI (Unifei) - have been participating of the event.
In 1998, the SEMOPTO became an international biennial event. Lecturers from Germany, Chile, Canada, Italy and France, as well as Brazilian specialists, joined it.
In 2000, the event was entitled "Telecommunications International Week" and gave national and international experts a unique chance to discuss the most recent issues from the telecommunications area.
In 2004, the conference was named "IWT - International Workshop on Telecommunications". Important keynote speakers, such as Prof. Dr. Pascal Lorenz, Ethevaldo Siqueira and Prof. Dr. Antônio Alfredo F. Loureiro, participated of the event at Inatel. Several papers and tutorials were presented in 10 different technical areas. IWT'2004 offered a business center where participants could show their products and services, besides tourist and cultural activities in the south of the State of Minas Gerais.
The 2nd edition of the IWT happened in 2007 and turned out to be a forum to exchange new ideas and information. 54 technical papers, authored by researchers from 6 different countries, were presented in 9 technical areas. These papers were chosen between 109 papers submitted from 9 different countries by 55 reviewers who took part in a committee of evaluation. In addition, 4 tutorials and 3 talks were presented by distinguished scientists, covering the hot topics in the telecommunications area at that time.
In its 3rd edition, in 2009, the workshop was held at Ericsson's headquarters in São Paulo. 56 technical papers, written by researchers from Canada, Dubai, Australia, USA, France, Italy, Germany and Brazil, covered the main subjects of the telecommunications world. The keynote speakers were Dr. Pascal Lorenz, from the University of Haute-Alsace/France, Dr. Roberto Saracco, director of Future Centre/Telecom Italy and Dr. Otto Strobel, from the Esslingen University of Applied Sciences (FHTE)/Germany. The Technical Program Committee counted on the participation of professors from the School of Electrical and Computer Engineering from Unicamp to organize the event. The IWT'09 was organized by Inatel in partnership with SBrT, IEEE-MG and Ericsson. CNPq and companies like Linear, Ativa and Sense cosponsored the event.
The edition of the IWT in 2011 happened at Vivo in Rio de Janeiro. A total of 64 papers were presented by authors from Brazil, Germany, Australia, Canada, Turkey, Peru, France, Sweden, Saudi Arabia and Hungary. During the 3 days of the event, the latest topics in the communications area were presented and discussed among the participants. The keynote speakers were Professor Dr. Shu Lin from University of California at Davis - USA, Dr.Hiroaki Harai, from NICT and Akari Project - Japan and Professor Dr. Max Henrique Machado Costa, from University of Campinas (Unicamp) - Brazil. The event had two tutorials. One of them were about Communication in Transportation Systems and were presented by Dr. Otto Strobel, from the Esslingen University of Applied Sciences (FHTE)/Germany. The other tutorial were about Future Internet and were presented by three professors (Professor Dr. Antônio Marcos Alberti, from Inatel - Brazil, Researcher Tânia Regina Tronco, from CPqD - Brazil and Researcher Christian Esteve Rothenberg, also from CPqd - Brazil. The event also had a session presented by BIC Group (Building International Cooperation for Trustworthy ICT), from Europe. The IWT'11 was organized by Inatel in partnership with SBrT, IEEE-MG and Vivo. Companies like Linear, Ativa and Sense cosponsored the event.
In 2013 the event was brought back to the headquarters of Inatel, in Santa Rita do Sapucaí, in the South of Minas Gerais. In the 5th edition of the IWT, researchers from Brazil, Italy, Israel, India, Colombia, Peru, and Ecuador presented 46 papers. The novelty, on that occasion, was the introduction of plenary sessions on researches carried out at Inatel. In those sessions the coordinators of the studies invited foreign researchers to discuss Spectral Sensing, Optical Communications and Cognitive Radio. The highlights were the participations of Dr. Antonella Bogoni, research leader at the Integrated Research Center for Photonic Networks and Technologies in Italy, professor Dr. Apurva N. Mody, Chairman of the IEEE 802.22 Working Group (WG) in the USA, and Dr. Boaz Nadler, member of the Weizmann Institute of Science, in Israel, as keynote speakers.