Synchronization system for pulsed power laser with optoelectronic control

A synchronization channel was built for pulsed power lasers with optoelectronic control. It consists of a transmitter and a receiver connected through a 5 m long fiber-optic cable, each in a separate shielded housing, and a high-voltage nanosecond pulse shaper followed by an electro-optic modulator behind the receiver. The transmitter contains a photodiode at the input on which synchronizing pulses impinge, a delay line followed by a shaper of current pulses consisting of an avalanche transistor with an emitter triggering circuit, and a semiconductor-type injection laser with reverse bias at the output. The receiver contains an input photodiode and two-stage output amplifier; the latter has negative feedback in parallel and an emitter follower behind. The shaper of high-voltage nanosecond pulses includes an autonomous power supply and a kratron output commutator. The hardware between this commutator and the electrooptic modulator includes two transformers with toroidal ferrite cores, two shaping coaxial lines, and two nonlinear-inductance coils. The modulator consists of two electrooptical crystals. The synchronizing channel is used for control of a transverse-excitation atmospheric-pressure CO2-laser operating in the repeater mode.