tocket;
Nice work on the divergence measurements.
I do think the raw diode has more power than you measured.
The ~40° wide fast axis is difficult to capture on most power meters.
I have seen about 13 to 14% increase with my Hi-Power lens over the 405/445 Aixiz lens.
And, of course, there is still a few % of loss with the AR aspheric.
LarryDFW