On Tuesday 27th june we managed to lock the laser on the filter cavity length. 

In the first attachment there is a plot of the transmitted power during the lock acquisition, in the second there is a picture of the transmitted beam when the cavity is locked. A short movie of the the lock acquisition can be seen here.

https://www.dropbox.com/s/pinj73ewrk9kgk0/locking.mp4?dl=0