Since we have a new result of modulation depth, I did the simulation again. This time I also find a way to get the simulation result of optical length, Finesse, FSR and FWHM.
simulation | measurment | CAD estimation | |
Finesse | 73 | 56 +/- 0.04 | - |
FSR(MHz) | 3943.3 | 2785+/- 0.19 | - |
FWHM(MHz) | 53.79 | 59.93 +/- 0.21 | - |
optical length(mm) | 38 | 53.855 +/- 0.013 | 38 |
error signal | 60 | 14 | - |
The problem of error signal difference becomes less sever now.