R&D (FilterCavity)
MarcEisenmann - 11:13, Wednesday 18 January 2023 (3146)
DDS1 and 2 reconnected ; SHG lock

[Marc, Michael, Shalika]

We reconnected all electronics of DDS1 and 2.

We are preparing a summary document that we will upload to the wiki.

We restarted the various rack electronics and laser and could directly see green flashes.

We changed the DDS1 DAC 0 and 1 frequency to 88 MHz for the SHG lock.

We could relock SHG but reflected green power seems too low (~10mW while it was ~240mW before in elog 3091).

We will install a power meter in transmission of SHG to check mode-matching.

Also, it seems that we might have some clipping (maybe at green FI) that needs to be investigated.