Reports until 13:08, Saturday 01 June 2024
H1 SQZ (SQZ)
terry.mcrae@LIGO.ORG - posted 13:08, Saturday 01 June 2024 (78178)
2nd SHG built; conversion efficiency not great/not terrible

Terry, Kar Meng

The cavity finesse, beam profile and power transmitted through the crystal seem fine. The conversion efficiency however still needs a bit of attention. At the moment it is almost 30% at 60mW. An extra 5 - 10% would be good. I suspect the phase matching temperature is not quite optimised. I'll lfine tune it Monday.

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