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Entry  Fri Feb 12 13:15:41 2010, kiwamu, Update, Electronics, triple resonant EOM --- liniaryity test linearity_edit.png
    Reply  Sat Feb 13 13:21:53 2010, Koji, Update, Electronics, triple resonant EOM --- liniaryity test 
Message ID: 2596     Entry time: Fri Feb 12 13:15:41 2010     Reply to this: 2602
Author: kiwamu 
Type: Update 
Category: Electronics 
Subject: triple resonant EOM --- liniaryity test 

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


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