I adapted the code to simulate the squeezing degradation in the case of standalone filter cavity.  Basically, I removed the transfer matrix accountig for ITF  in the quantum noise computation.

Now if we select a homodyne detection angle the code should simulated what we exepected to see when taking the spectrum of the Homodyne output.

In the code I also removed the approximation of small detuning and I simulate a large detunig case (50kHz) as the one we tested recently. (Entries:  #1747, #1751)

Plot 1 shows the expected results for Homodyne angle: 0 deg and 90 deg. Plot 2 shows an intermediate case (30 deg) compared to the  0 deg case.

The degradation parameters are the same reported in entry  #1766.