I switched on everything after the last power shut down.

I re-aligned the HeNe probe with the surface reference sample, and made a calibration scan, then, a calibration scan of the bulk reference sample.

The pump power is 30mW, so,
for the bulk:      R = 0.08/4.75/0.03/1.04 = 0.54 cm/W
for the surface: R = 0.52 /4.1 /0.03 / 0.2 = 21.1 W-1