I'm aligning the AOM. The R=0.5m mirror's position crosses the insulation border by 1.5" (see attached picture.) The black line on the table shows the border of the insulator. The mirror is on a translational stage.
I'm thinking of 2 choices to solve this,
1)using a mirror to turn the beam to the side of the table. The mirror will be placed after the AOM, around the edge the border.
2) using 2 mirrors (after the beam is split to RefCav and ACav's paths) to shift the beam path to the side of the table.
The first choice will be better, since I won't have to recalculate the mode matching, but there might be unexpected problems.
The VCO is working fine, I can see +/- 1st order beams coming out.