[Alex, Jeff]

We measured the output of the Thorlabs power supply we have for the ULN turnkey laser.

We measured it with no load and with 1.3K R (12V/1.3K = 0.01A) and saw the following IMG_1203.jpg

24Hz sawtooth, 50mV pk-pk

We wonder if this has something to do with the ground fluctuations on the DC modulation port of the laser. Is this to spec for the power supply? The data sheet mentions 100mV ripple but does not give a frequency.