Calibration of PDs

I report, once more, the calibration of the PDs. But i dont' know because for the 12599 PD is different from last. More o less for the 12595 is similar.

Now the maximum power for 12599 (out loop) that we can apply is around 200 mW and the maximum voltage is around 6 V...i don't know.

I repeat more times the calibration and i calculated values differents. In particular for the 12595 connected to the pre-amp frascati, I noticed that for power more bigger than around 600-700 mW the voltage of the PDs connected to the pre-amp is oscillated and it is impossible to measure. For this i calibrated until to certain values of power.

For this problem i applied for the next measure a power of around 400 mW and 600 mW for 12595 PDs.

At the end of the calibration i think of have:
V/W (12599) = 30.6
V/W (12595) = 4.5

I consider this values. But it is very strange, in particular for 12599, that the responsitivy is different from expected value