[Chien-Ming, Hsun-Chung, Marc, Michael]

First we found out that the power just after SHG is a bit lower than usual (measured 216mW) so we might have to tune its temperature.

Then, we found that MZ and GRMC were quite misaligned (especially in pitch).

We placed a power meter in transmission of GRMC to realign them.

First, the power had some periodic increase so we reduced the MZ scan period from 10 to 0.

Also, realigning it helped. After realignment we got :

1st arm TEM00 2.54V ; hom = 0.18V : 93% mode-matching

2nd arm TEM00 308mV ; 3 hom each = 6.4mV  ; 94%

We tried to lock GRMC and MZ but the lock was not stable. So we had to increase the gains as follow:

increased GRMC gain to 3.1 from 1 ; increased MZ gain from 1 to 3

Finally, they locked and with MZ offset 4.54 we measured 44.7mW in transmission of GRMC in good agreement with the expected value.