I have measured the linearity of our triple resonant EOM (i.e. modulation depth versus applied voltage)
The attached figure is the measured modulation depth as a function of the applied voltage.
The linear behavior is shown below 4Vrms, this is good.
Then it is slowly saturated as the applied voltage goes up above 4Vrms.
However for the resonance of 29.5MHz, it is difficult to measure below 7Vrms because of the small modulation depth.
Our triple resonant EOM looks healthy
- - - - result from fitting - - -
11MHz: 91mrad/Vrms+2.0mrad
29.5MHz: 4.6mrad/Vrms+6.2mrad
55MHz:82mrad/Vrms+1.0mrad |