Participiant: Marc and Yuhang

We want to know how the beam will look like after putting the EOM. So we put EOM yesterday and checked the output of it today.

Before putting EOM: we found for the far field(more than 40cm), we can see clearly the astigmatism even with the card. See attached Fig.1

After putting EOM: we found the astigmatism disappear for the far field(the beam looks very perfect by card now, unfortunatly I didn't take picture). But we found it in near field. See attached Fig.2. You can see the waist position is really different. But for the far field, it looks fine.