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Entry  Wed Jun 23 23:52:48 2010, tarac, Laser, RefCav, RefCav is locked and optimized 
    Reply  Thu Jun 24 09:37:16 2010, rana, Laser, RefCav, RefCav is locked and optimized 
Message ID: 175     Entry time: Thu Jun 24 09:37:16 2010     In reply to: 174
Author: rana 
Type: Laser 
Category: RefCav 
Subject: RefCav is locked and optimized 

For the sideband power, you don't really want to make it so large. All that you really want is to make sure that the shot-noise signal is bigger than the electronics noise.

Once you guys start working on the noise budget, you will see that the input referred noise of the RFPD is equivalent to roughly 2 mA of photocurrent. So, for a reasonable

signal you should set the modulation depth (Gamma) equal to ~0.3-0.5.

Remember that we are also going to be fighting against the residual RFAM from the EOM, so its important to maximize the signal amplitude relative to the RFAM. The RFAM

signal will increase with increasing modulation depth...

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