Sheila, Fabrice, Daniel, Nutsinee

Today we went in to check our pump mode matching into the OPO with the new fiber. The mode mismatch (2nd order mode) was high so we decided to swap the collimator as well. After some alignment tweak we were able to get >90% mode matching. The new collimator part number is 355230-FCAPC-532--00-H9Q001, Bake load number is 9435.

We tried to improve the alignment into the coupler on ISCT6 but only got a few % improvement. The overall transmission from ISCT6 to SQZT6 is 40-45%

We scanned the second PZT (PZT1 on the red interface box) and saw similar behavior as the other PZT that we have been using (~2-3 FSR over 100V scan).

We tried to check the sqz beam (seed) on the OMC side but because both HAM5 and HAM6 ISI were tripped this check will have to wait. Both pump and seed came through SQZT6 just fine. Sheila and Fabrice tuck in the 5m fiber into the orange conduit. The new in-air fiber from ISCT6 to HAM6 is labeled O3-B.

We are back to where we were exactly a year ago.