We tried to do the better alignment today. While we were adjusting the EOM, we found out the EOM has better transmission rate when the beam inject near the edge. Another problem is that the beam path seems tilt somewhere, since we aligned all the mirror in the green path last Friday, but now it does not work anymore.
And we could not kill one higher order mode to get better mode matching, and also there is one mode jump out from time to time when we try to align the cavity. The final efficiency we got is about 20%(260mW goes into the cavity and 55mW green received at the transmission of the dichoric, 12mW received by the reflection of the dichoric)