At the begining, we used the wrong beam dimmsion, the initial beam DIAMETER is 2000um.

BUT, all the telescopes we designed are using RADIUS as 2000um.

Today, we realized this problem. I designed the telescope again. The EOM doesn't make a large difference. This design can be a fine reference.

Lesson: actually we have many chances to realized this problem, we checked every time after putting the lens. But everytime, we checked only the beam waist position. We never checked the beam waist size. So we didn't realize this problem. So next time we should check both of them carefully.