I plotted the obtained ringdown data at room temp., 120 K, and 8 K, respectively.
The results shown in this entry are preliminary though, the decay time at 8 K is less than that at room temp.

It should be noted that the measured data at 120 K was 3days after the cavity reached 120 K.

I will analyze the optical loss of the folded cavity.
In addition, I am planning to compute the dynamical response of the cavity.