Danny V., Georgia M., TJ S.
Today we continued to touch up the alignment of the EY HWS path with the 50um core fiber that was installed last week. We ended up translating the BS2, the polarizer, and L3 because we seemed to have a good alignment to the irises, but it was not centered on these optics. There was some bright fringes seen on the outside of the beam that we cut out using the iris on the fiber launcher. After some minor tweaks to the alignment, we were able to get rid of much of the clipping on the sides that we saw previously, and we now have an almost round beam profile as seen on the HWS camera. (Attached a screenshot of the stream with a the plate off.)
Tonight we will run a ring heater test and post results tomorrow.