Lower noise frequency-domain measurements with new preamp

Raeef took new measurements with a much lower noise preamp made by the Boston University Electronics Design Facility (EDF). Below is a drift measurement (60 repeated measurements every minute for 1 hour) with an 850nm laser diode, taken from 50-500MHz on an optical phantom with a 3mm APD. Also shown are noise floor measurements for all 6 laser diodes.