Today I checked the 2 PBS available in PCI.

There is one with label (1064 nm PBS) so I decided to use this one.

I moved it to the mount with the good height but I'll need to print a new label for it.

I measured its transmission to be 166.0 uW with 166.4 uW of incident power.

Actually, it seems that the beam is too large for the small power-meter head as the power is supposed to be 30 mW there...

Anyway I started to tweak the alignment by checking the AC value of the surface reference sample.

Up to now I did not manage to recover proper alignment and it seems that the shape of the AC signal during Z scan is a bit strange (kind of similar to bulk sample...)

Hopefully I'll have a bit more time tomorrow to finish this alignment.

Note that to save time the pump laser is kept on with low power (30 mW)