we found the pd DET10A for the 633nm probe didn't give any output. Replacing the power supply with a 12V battery solved the problem. We checked the power supply with a multimeter and it looks fine (9V of output). We figured out that it's the adaptor bad contact. We continue working using the battery.

We made a scan of the surf ref sample and maximized the AC signal adjusting the pump alignment.

Current experimental parameters:

Laser current 1.3A Power meter value: 31mW (without sample)

DC signal: 3.26 (with sample) (3.4V at the max of the scan)

AC signal max: 0.2V