Terry, Sheila, Nutsinee

---------------

Yesterday we were able to get the SHG ~99% mode matched. After we tilted the first lens to avoid the back reflection into the laser we ended up with ~98% mode matched.

Given that we can find all the optics, we should be able to finish the rest of the table within a week or two.

---------------

Other notes:

• So far our SQZ table drawing and mode matching calculations are similar to what LLO has. 
• The waist of the mephisto is measured to be 160um. 
• Distance from the laser waist to the first lens is 26 cm. Distance from the laser waist to second lens is 132cm. Distance from the laser waist to the final lens before the SHG is  234.5cm
• The measured waist at the position of the SHG is 72.5um (before insertion of the SHG). Close to the solution at LLO (71um). 

• We had a few issues with the SHG PZT. The circuit was shorted due to the electrical contacts soldered on the edge of the PZT touching the brass plates (see SHG layout for reference, the plates mentioned are labeled I and J on page 2). Sheila put in a couple of insulating washers between the PZT and the brass (ordered from McMaster, part #95601A360). That fixed it.