With the chosen transimpedance of 300 ohms, in order to be able to see the shot noise of 10 mW of light in the digitized data streams, we'd need all 3 stages of whitening. If we want to be shot noise limited with 1 mW of LO light, we'd need to increase said transimpedance I think.
The measurements were taken with
Of course, it's unlikely we're going to be shot noise limited for any configuration in the short run. But this was also a test of
All 3 tests passed.