Naoki, Vicky, Nutsinee

Today we successfully realigned seed and CLF back into the coupler. Both have ~50% fiber throughput from SQZT0 to SQZT7. This includes the fiber switch lost. Seed was so misaligned that we needed to plug the seed fiber into pump output to get the green light out of the seed coupler to help with the alignment. We adjusted both the alignment mirrors and the fiber coupler Ztheta adjuster. 

Yesterday we found out that our PMC was not that touchy. PMC guardian looks at PMC refl normalized current to check if it's still locked. The value we gave it was so marginal that every time we bump into something the PMC would think it had lost lock and started scanning. We've since increased that threshold from 0.4 to 0.6. Now we are able to pico the steering mirrors into the SHG without losing PMC lock. Naoki managed to get the green output back to 60mW with those.

We also calibrated seed launch and PMC trans (PMC trans was actually done yesterday).

BNC to HV adaptor has been returned to the OPO PZT.

Also got a proper measurement of FI rejected beam. About 50% of the SHG input comes back to the FI. Only a few tens of uW of green light measured with the bandpass filter.

The seed launch power changes as the flipper goes up and down. More power is being rejected in HAM7 now compared to when we closed out. Something to revisit on Monday.