High Power, High Speed Si And GaAs Optical Switching Devices Utilizing Semiconductor Lasers As An Optical Source

Abstract

High power, high speed, optically activated switches incorporating only semiconductor devices are small, efficient, and reasonable in cost. They consist of a 2D laser diode array activating a semiconductor switch with an integrated optical port. Several types of semiconductor switch devices are useful. Si PIN diodes with long carrier lifetime provide the means for cw switching kilo-watts of rf power with pulsed laser diode arrays which require only a few watts of average power. DC biased, Si PIN diodes are also useful in controlling up to a mega-watt of power into a load for short ns bursts. Pulsed biased GaAs devices, utilizing the phenomenon of lock-on, are used for controlling up to mega-watts of power into a load for short ns bursts. An overview of these types of switches will be described.