I was trying to understand why the mode matching through the PMC was so bad (I got 30 mW transmitted with 120 mW input).
So. Who knows where the wincamD is?
added: pics of PMC REFL before and after locking, in order
Totally possible that my mode matching is just that crappy? Maybe.
I did take beam scans of the mode going into the PMC just before aligning to it for the final time. I can do so again to get real profiles and characterize the H1NPRO
Here are some scans of the beam with the winCAMD. I had a reflective ND filter on for these (hence some of the fringing).
I matched this spatial mode to the cavity, and checked that it had the right waist size / location (5-10% on waist size, 1-2 inches on position) with the winCAMD. I was only able to get 220 mW out of the PMC after aligning tilt / translation into the PMC, with the full 1.6ish W in. At Rana's gentle suggestion, I am proceeding with the rest of the experiment. I noticed the PMC mirrors has a lot of scatter while I was aligning them, so I should quickly check if this is loss (Input = Refl + Trans + Loss?) by measuring Refl and Trans
Remember: If someone (myself?) later figures out what the problem is, I don't have to realign anything downstream of the PMC, I simply have to make there be more power coming out.