Available Technology

OPTICONDISTOR: High Power Optically Isolated Transistor

Diodes and transistors have limited voltage capability because most of the applied voltage is confined to a very thin depletion region between junctions. By controlling current optically, isolation between devices and a bulk transconductance-like property without a junction results. For devices made from specially doped wide bandgap materials, the voltage can be scaled upward easily; because they are isolated optically, devices can be stacked and controlled from ground.
Patent Abstract: 
The Optical Transconductance Varistor (Opticondistor) overcomes depletion region voltage limitations by optically exciting wide bandgap materials in a compact package. A 100μ thick crystal could have the capability approaching 40kV and would replace numerous equivalent junction devices.
Internal Laboratory Ref #: 
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