I'm computing coating Brownian and thermo optic noise (TO) in AlGaAs coatings using GWINC code to compare it with the result reported by G Cole etal. Brownian noise from my result is similar to theirs, but TO noise is still not correct. I'm working on it.
We have talked about what kind optimizations should we go for AlGaAs coatings in order to minimize TO noise. There are two choices for us to consider
Since the second option is more desirable in terms of manufacturing because of its simplicity, I decided to check if it really can bring TO noise below coating Brownian noise. If it is true, we can use it for our mirrors.
(I'll add more details about the calculations later)