The power supply is arranged to deliver a train of RF pulses corresponding in number and duration to the train of digital pulses received.

The average power in the RF-pulse train can be varied by incrementally varying the duration of one or more of the digital pulses in the digital pulse train.

The digital pulse train may be continually optimized based on the characteristic data.

The output of the each photodiode is converted to a train of digital pulses having the pulse repetition frequency of each laser.

Each unit cell converts photocurrent from its photodetector to a digital pulse train that is coupled to multiple counters in the unit cell.