I measured dimensions of the green beam after Mach-Zehnder to design a telescope for a mode cleaner. One of attached pictures shows a result. The x-axis of this graph starts from the output of EOM.
An eigenmode of the mode cleaner was calculated using values and a formula shown in a picture. A cavity length was roughly estimated from the number of holes on the optical table because I could not find it in e-logbook.
Based on these information, I searched for a optimal lens pair for telescope. One example is shown in a picture. In this case, mode matching factor for vertical and horizontal axis of the beam are 99.37 % and 99.56 %, respectively.