I used the free software called 'ABCD' for Mac to construct this mode matching solution for going from the PMC to the IMC.
After getting it close by eye, I plugged the initial guess into Matlab and let it optimize the distances. I then plugged this into 'ABCD'
to get the exact solution. ABCD doesn't actually optimize anything; it just makes a nice table and graphically plots the solution.
 The first waist between the first lens (f = +200 mm) and the second lens (f = 150 mm) is where the triple mod EOM goes. I have not accounted for the index (1.75) of the KTP.
 The third lens we need is a f = +400 mm lens. I have put the lenses in the new layout drawing at the positions indicated in the Omnigraffle drawing. Each grid square corresponds to 1 inch.
The part numbers for these lenses are:
PLCX25.4103.0UV1064
PLCC25.477.3UV1064
PLCX25.4206.0UV1064
