ABSTRACT
Opto-mechanical switches redirect optical signals from one port to another by moving a fibre tube assembly or an optical component, such as a mirror or prism. More technology exists for optical switches than any other functional component within the optical network. Optical switches include many types, for example: opto-mechanical switches, thermo-optic switches, electro-optic switches, micro-electro-mechanical switches (MEMS), and micro-optomechanical switches. This chapter illustrates a few switch designs, which are manufactured for use in communication systems, and other applications. Opto-mechanical and electro-mechanical switches are the oldest type of optical switch and the most widely deployed at this time. Opto-mechanical switches collimate the optical beam from each input and output fibre and move these collimated beams around inside the switch. Many modern opto-mechanical switches are used in telecommunication networks management, monitoring, restoration, and protection. MEMS is a rapidly growing technology for the fabrication of miniature devices using processes similar to those used in the integrated circuit industry.
