Step recovery diodes pulse generator in the high power laser system

An ultra-fast square pulse generator has been developed by using step recovery diodes (SRDs). This circuit mainly includes two parts: the pulse producing part based on an avalanche transistor and the pulse sharpening part based on step recovery diodes. The circuit can generate an electrical square pulse with the rise time of 160 ps, the pulse full-width at half maximum (FWHM) of 5 ns, the voltage amplitude of 23 V, and in 50Ω load. The trig jitter is less than 5 ps (RMS) and the flatness of top is better than 5%. This pulse generator has been applied in the so-called 'Shenguang' high power laser system successfully.