A technology to generate arbitrary electrical waveform for shaping high power laser

摘要

In order to improve the output power of laser pulse in the inertia confinement fusion experiment, an arbitrary waveform generator is fabricated to shape the laser pulse. The arbitrary waveform generator is based on the micro-strip line transmission delay technology and GaAs Field Effect Transistor set which has a good ability of generating voltage-controlled current. To satisfy high amplitude requirement on electrical pulse for optical waveguide modulator, an ultra-broad bandwidth voltage tunable amplifier is applied to the output signals, and the pulse amplitude is adjustable. The designed generator generates a pulse waveform with amplitude between 0 and 5 V, duration less than 10 ns, 330 ps time-domain adjustment and a square pulse with rising edge 471 ps, falling edge 428 ps. The experiment results show the shaped laser pulse is obtained based on the shaping electrical pulse.