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Entry  Wed Nov 9 14:49:07 2011, kiwamu, Summary, LSC, Characterization of the Power Recycled Michelson contour_loss.pngcontour_MM.png
    Reply  Wed Nov 9 16:29:36 2011, Koji, Summary, LSC, Characterization of the Power Recycled Michelson 
       Reply  Fri Nov 11 14:55:47 2011, kiwamu, Summary, LSC, Characterization of the Power Recycled Michelson : take 2 rec_gain.pngrefl.pngpbu.pngMM.pngloss.png
Message ID: 5875     Entry time: Fri Nov 11 14:55:47 2011     In reply to: 5851
Author: kiwamu 
Type: Summary 
Category: LSC 
Subject: Characterization of the Power Recycled Michelson : take 2 

Quote from #5851

The recycling gain is determined by the optical configuration and the optical loss in the cavity.

How much is the actual recycling gain? And how does it affect the signal extraction?

 As Koji pointed out I made a wrong definition on the recycling gain of PRMI (Power-Recycled Michelson Interferomter).

In the correct definition the estimated recycling gain is 15.
In order to answer Koji's second question,which is about the effect on the signal extraction,
I need to scratch my head for a while.
( Give me some time..)
 
The value what I called "Recycling gain" must have been called "measured power build up" or something like that.
For clarity I put the definitions of the quantities.
    Recycling gain :      rec_gain.png 

   Reflectivity of PRMI (measured by REFLDC): refl.png

    Power build up (measured by POY DC) : pbu.png

    Mode Matching (MM) efficiency :  MM.png

    Loss in the PRMI cavity : loss.png

 


 (Results of Measurement and Estimation)

     Estimated recycling gain = 15

     Estimated MM efficiency = 47.4%

     Estimated Loss = 5.3%

     Measured power build Up = 7

     Measured reflectivity of PRMI = 0.5

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