Last week we measured the bandwidth of cavity. By using this data, we also did the extrapolation and got the losses.

We considered all the losses come from the increase of end mirror transmissivity. Then we did like this:

1. Fix r1 as sqrt(1-T1) and T1=0.136%.
2. Use the Airy distribution to fit EM transmission and get R2.
3. Losses is calculated as 1-R2-T2. T2 is set as 3.9ppm.