The AVOZ-F series of pulsed laser diode drivers is capable of generating very high current pulses (to 180 Amps) with very narrow pulse widths (20 ns). This series is ideal for testing high-speed laser diode arrays.
The AVOZ-F1-B is a voltage pulser designed to drive a 1.0 Ohm load impedance. The 1 Ohm impedance acts to limit the output current, and to terminate the 1 Ohm output transmission line. If the load is a diode, a resistance must be added in series with the diode so that the total resistance is 1 Ohm.