camilla.compton@LIGO.ORG - posted 11:02, Friday 14 February 2025 (82806)
SQZT0 Powers LHO vs LLO
Sheila, Camilla
We've seen our SHG power drop with LVEA temperature swings (82787, 82057), green REFL has also been increasing a little since our OPO crystal spot move, meaning our losses are increasing. Comparing our current powers to LLO's below:
Intereststing that LLO send in less SHG launch power than us but have a much higher NLG.
| LHO | LLO | |
| IR Laser | 815mW | 930mW |
| PMC Trans | 680mW | 653mW |
| SHG Trans | 100mW | 135mW |
| SHG launch | 25mW | 20mW |
| OPO Trans | 60uW | 140uW (from 75096, medm unclear) |
| OPO REFL DC | 1.5mW | 2.3mW |
| NLG |
10.2 in 82202 with 80uW.
Expect lower with 60uW OPO trans
|
19 (from 75096) |
| CLF launch | 0.07mW | 0.19mW? |
| FC launch | 6.6mW | 26mW |