Yuhang, Michael, Marc

After aligning back SHG, we worked on aligning back GRMC and OPO.

For GRMC, we noticed that the EOM which was used for GRMC and FC locking must be remained if we don't want to adjust mode matching. The influence of this EOM on mode matching is substantial. 

For OPO, we noticed that the beam is going through the two lenses at very low place but not the center. There is an iris on the beam path going to OPO, which is checked again to be centered well.

The green beam going to the filter cavity is still misaligned at the stage of AOM. However, this will require another RF source.

The new OPO could be replaced soon.