EDIT: These numbers are for a perfect, non-lossy arm cavity. So, a half real, half imaginary world.
Carrier uses arm cavity reflectivity for perfectly resonant case.
PRC carrier gain, flipped PR2, PR3 = 61
PRC carrier gain, regular PR2, PR3 = 68 (same value, within errors, for no folding at all).
Carrier gain loss = (68-61)/68 = 10%
SB uses arm cavity reflectivity for perfectly anti-resonant case.
PRC SB gain, flipped PR2, PR3 = 21
PRC SB gain, regular PR2, PR3 = 22 (same value, within errors, for no folding at all). <--- yes, this this "regular PR2, PR3 = 22..."
SB % gain loss = (22-21)/22 = 4.5%
I claim that we will be fine, recycling gain-wise, if we flip the folding mirrors. If we do as Yuta suggests and flip only one folding mirror, we'll fall somewhere in the middle. |