On the Green YARM end table the second mirror behind the laser has been exchanged.
Reason: The light is impinging on the mirror under an angle of about 10 degrees, but the old mirror was coated for angle of incidence (aoi) of 45°.
Thus it was more like a beam splitter. The new mirror is a 1" Goock & Housego mirror which has a better performance for an aoi of 10 degree.
Realignment through Faraday Isolator and SHG cristall as well as 532nm isolator is almost finished.