Reported 775 light leaking through what should be 775 HR mirrors (<1 ppm @ 775, i.e. the 1550 input/output couplers) in this post. Confirmed it is not scatter coming from anywhere else but through the 1550 output coupler. This does not explain why it is not gaussian. Most likely some kind of scatter from inside the cavity. Could potentially be from the ghost being observed on the 775 camera. Could also just be the intercavity alignment is not optimal and the beam is clipping on exit.