Summary form only given. Advances in optical devices for applications in broadband telecommunication networks were discussed. Starting with basic optical fibers, semiconductor lasers, and photodetectors, the author covered optical devices for coherent optical communications, optical amplifiers, and optical switching as well as optical passive devices. In addition, advances in optical transmission and switching systems made possible by the evolving optical technologies were discussed as well as their impact on the viability of the broadband telecommunication network. >