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Entry  Tue Dec 8 15:57:16 2015, yutaro, Summary, LSC, Power recycling gain estimation from arm loss measurement 
    Reply  Fri Dec 11 09:35:44 2015, yutaro, Update, LSC, Power recycling gain estimation from arm loss measurement LaserOptikAR.png
       Reply  Fri Dec 11 13:28:36 2015, Koji, Update, LSC, Power recycling gain estimation from arm loss measurement 
          Reply  Fri Dec 11 15:37:50 2015, yutaro, Update, LSC, Power recycling gain estimation from arm loss measurement PRG_plot.png
Message ID: 11872     Entry time: Fri Dec 11 09:35:44 2015     In reply to: 11864     Reply to this: 11873
Author: yutaro 
Type: Update 
Category: LSC 
Subject: Power recycling gain estimation from arm loss measurement 

I took PR3 AR reflectivity and calculated PRG (PR3 is flipped and so AR surface is inside PRC).

As shown in attached figure, which shows AR specification of the LaserOptik mirror (PR3 is this mirror), AR reflectivity of PR3 is ~0.5 %. Since resonant light in PRC goes through AR surface of PR3 4 times per round trip, round trip loss due to this is ~2 %. Then I got

PRG = 7.8.    

 

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LaserOptikAR.png
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