Abstract
We report the use of optically controlled high Tc superconductor (HTS) films as a picosecond photoresistive switch in a repetitive ultrafast electrical pulse forming network. A constant current source is used to charge a short circuited transmission line through the HTS switch in its superconducting state (without light illumination). When the laser pulse illuminates the HTS switch, the current is blocked because of the state transition in the HTS film, transforming it from the superconducting to the normal state. The stored energy in the transmission line is then delivered to the load. Thus the HTS device is used as the picosecond optoelectronic opening switch. We believe that this work is the first demonstration of the HTS device for such usage. At present this is the best technology in that the pulse forming system can be used repeatedly with a significantly high repetition rate and power gain.
© 1993 Optical Society of America
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