Aritomi and Yuhang

In the past few weeks, we measured homodyne shot noise few times, we found the shot noise level changes from -133.2dB to -133.7dB.

We monitor the BAB intensity for almost one hour on Monday this week. We found BAB intensity changed by about 5% during this time (attached figure 1). By doing 20*log10(sqrt(1.05))-20*log10(sqrt(1)), we found this can introduce 0.2dB shot noise change.

Although BAB and LO both come directly from main laser, this is not a test done for a real LO. We decide to check the power of LO before and after IRMC soon.