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PMC
ISS
FSS
LASER
Mixing Error Monitor2
Radiofrequency Photodiode4
Reference Cavity (RC)
AOM (H1) /
CURRSHNT (L1)5
Bandwidth
~ 0.5 MHz
δf
FAST1
δP
Bandwidth
~ 100 kHz
NPRO Monitor
Amplitude Monitor
PO
PZT9
Error Point8
Radiofrequency Photodiode10,11
LO
PO
EOM
In-Loop Monitor Photodiode6
In-Loop Sensing Photodiode7
LO
NPRO
eLIGO
PSL
RC Transmission
Monitor Photodiode3
F = 21 MHz
F = 35.5 MHz
EOM
PA
LIGO-D1101223, version 1