Load assembly is designed to emulate laser diodes for evaluating laser drivers. These laser drivers can be used to drive one or multiple laser diodes with high efficiency and low noise for DPSSL, EDFA, or fiber laser applications. They accept wide range input voltage and their output voltage can be from 0V to almost the same as the input voltage. The size is very small, but can output high current, high voltage, thus high output power. In addition, these laser drivers have low output noise (except that there is a 500kHz 4mVp-p ripple voltage at the output) and wide modulation bandwidth. This laser load assembly can be used with this evaluation board, or be used alone, as a dummy laser load, to emulate one or multiple laser diodes.