Notes from working in lab:
-With the amplifier not amplifying (just nominal ~300 mW output state) the REFL 1550 PD for OFC1 needs a lower ND filter on it. I've swapped it. Note that this should be swapped back BEFORE turning the amplifier on. I've put a note on the amplifier as a reminder.
-The error signal size is quite small. Had an idea from something Lee said a while ago. When we were setting up the new space someone saw the tank circuit box hanging off the EOM and suggested adding a small cable to it. Increasing the length between the inductor and the EOM significantly decreased the error signal amplitude. I've removed the cable. (pics attached)
-In the move I mixed up which tank circuit is for which EOM. They have been identified and labeled. Both tank circuits are on their respective EOMs.
-The error amplitude (with +24 db input boost on the laser lock box) is now ~100 mV and the RMS of the error signal when the cavity is laser locked is 10 mV.
-Went to start 775 OFC1 alignment but the AOM for this path is not deflecting a beam now. I don't know the cause.
Focusing on other things until AOMs are diagnosed. Afternoon work:
-PDs are powered for OFC2
-BNCs are plugged into patch panel and Moku 2.
-Looking for flashing in OFC2, can change which moku scans the laser freq by swapping patch panel locations. Much easier than before.
-775 path EOM has been optimized to give max error amplitude.
-OFC2 has been recovered and is fully functional (both paths).
Plan is to fix the AOM for OFC1, align 775 for OFC1, and then start thinking about OFC3. In B102 my moku systems were a little wonky, with the patch panel and recabling from scratch each filter cavity has its own moku now. OFC1 = Moku 1 / OFC2 = Moku 2.