Abstract
The construction and some of the operating characteristics of a multichannel, laser triggered spark gap (LTSG) are described. Simultaneous subnanosecond switching in five channels of up to 10 kV is possible, making the LTSG an ideal master switch for pulsing Pockel cells to control the pulse shape and isolation necessary in a large laser oscillator-amplifier system. Operated under N2 at a pressure of approximately 10 kTorr the LTSG had a risetime <300 ps and used in conjunction with a fast Pockel cell switch could shutter reliably optical pulses of <or approximately=500 ps duration from the output of a Q-switched laser. The results indicate that at higher pressures the risetime of the LTSG should be further reduced allowing switching in approximately 100 ps to be achieved.
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