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Entry  Fri Apr 1 23:05:58 2011, kiwamu, Update, Green Locking, noise budget noise_budget.png
    Reply  Wed Apr 6 02:41:01 2011, kiwamu, Update, Green Locking, noise budget : some more noise  noise_budget.png
Message ID: 4491     Entry time: Wed Apr 6 02:41:01 2011     In reply to: 4482
Author: kiwamu 
Type: Update 
Category: Green Locking 
Subject: noise budget : some more noise  

It turned out that the dark noise from the beat PD and the shot noise on the beat PD was overestimated.

So I corrected them in the plot of the last noise budget (#4482).

Additionally I added the end laser error signal in the plot. Here is the latest plot.


 The end laser error spectrum is big enough to cover most of the frequency range.
 (although it was taken at a different time from the other curves.)

Quote from #4482

According to the plot what we should do are :

  * More accurate PD noise measurement

  * More accurate shot noise estimation

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