Marc, Yuhang

We investigated the possible RIN and phase noise coupling from the green pump to the squeezing measurement.

Pump RIN :

We repeated the measurement of elog 3065 but injected this time larger noise (400mVPk instead of 100mVPk).

Results are attached in the first 5 figures. The results are compatible with the previous measurement : to match the projection of pump RIN to our estimation of classical noises, we should have about 9.4dB of squeezing instead of the 6dB that we are seeing at high-frequencies.

Pump phase noise :

To make this measurement, we injected 20mVPk of white noise to CC1.

Results are attached in figure 6 to 11.

This time, we can see a broadband degradation of the squeezing level (by at least 2dB). However, the coherence is really low between our excitation and the squeezing measurement..

Also, it seems that the contribution of pump phase noise create some similar pattern to the contribution of pump RIN to the squeezing measurement..