Yamada, Akutsu

• Put two IR-QPDs for Gouy phase telescope of TMSY at Yend. RQPD1 was placed at 20*25 = 500 mm away from RST3, while RQPD2 was placed at 760 mm away from RST3. Based on Fig 4 of 10337. If this setup works well, then we need to revise the drawing here, according to Fig. 1. The beam profiles where the QPDs would be placed are in Fig 2 and 3 (RQPD1 and RQPD2, respectively).
• Then we somehow centered the beam spots on the QPDs... somehow. As the spots are tilted elliptical, balancing the four outputs from the QPDs was hard.