Accession Number : AD0902555

Title :   Light Activated Silicon Switch.

Descriptive Note : Final rept. Jun 71-Jul 72,

Corporate Author : WESTINGHOUSE RESEARCH LABS PITTSBURGH PA

Personal Author(s) : Roberts, J. S.

Report Date : AUG 1972

Pagination or Media Count : 133

Abstract : Light Activated Silicon Switches (LASS) have been fabricated and tested in a radar test modulator with as many as 10 devices being triggered simultaneously in a single series or a series-parallel switching arrangement. The light trigger source was a Q-switched, neodymium doped yttrium alluminum garnet laser emitting a 20 nanosec, 0.1 joule pulse at 60 Hz. Devices were triggered on in 10 nanoseconds at a dI/dt of 4000 A/microsec to peak current of 1800 amperes from a blocking voltage state of 1000 volts. Optical coupling of the laser energy to the LASS devices utilized a system of dielectric beamsplitters which took advantage of the plane polarization and monochromatic nature of the laser beam to maximize the efficiency of coupling. (Author)

Descriptors :   (*LIGHT, ELECTRONIC SWITCHES), (*TRANSISTORS, PHOTONS), SILICON, NEODYMIUM, DOPING, POLARIZATION, THYRATRONS, RADAR, RODS, MODULATORS, REFLECTIVITY, VOLTAGE, ELECTRONS, HEAT SINKS, OPTICS, ENCAPSULATION, HERMETIC SEALS, ABSORPTION, SOURCES, DIFFUSION, HELIUM, NEON, FIBER OPTICS, LASERS.

Subject Categories : Electrooptical and Optoelectronic Devices
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE