Plug and play solid state switching system for laser applications

Reliable, long life, and low maintenance switching of 3-5 kA (to 5 kA//spl mu/s) for repetitive short pulses (5-100 /spl mu/s) for applications such as laser switching and driving pulse shaping transformers has been limited in the past by the availability of switching system technologies. A new switching system is presented that increases peak current and di/dt capabilities and reduces dynamic energy loss. This solid state system uses a very fast triggering circuit. Since the power supply for the trigger-unit is a separate unit, the system has "plug and play" operation. The quick and strong current source gate-unit, in combination with the low inductance thyristor housing, allows very fast turn-on with low losses. Blocking voltages of 4.5 kV (3 kVdc) per device are possible, and with simple series connections, higher ratings can be achieved. The simplicity of the power supply and the integrated trigger-unit as well as the use of optimized silicon wafer geometries, leads to a more cost effective solution compared to actual solid state systems. Capabilities are discussed with respect to reliable management of pulse widths, repetition rates, voltage levels and dynamic losses.