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Entry  Tue Jan 4 18:26:59 2022, Anchal, Update, BHD, Tested 2" PR2 candidates transmission 
    Reply  Wed Jan 5 17:46:04 2022, Anchal, Update, BHD, Tested 2" PR2 candidates transmission 
       Reply  Mon Jan 10 18:20:45 2022, Anchal, Update, BHD, Tested 2" PR2 candidates transmission 
          Reply  Tue Jan 11 15:21:16 2022, Anchal, Update, BHD, PR2 transmission calculation LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPRS_Trans_Calc.ipynb.zip
             Reply  Thu Jan 13 17:10:55 2022, Anchal, Update, BHD, PR2 transmission calculation LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip
                Reply  Fri Jan 14 03:07:04 2022, Koji, Update, BHD, PR2 transmission calculation 
                   Reply  Fri Jan 14 11:00:29 2022, Anchal, Update, BHD, PR2 transmission calculation 
                      Reply  Fri Jan 14 13:46:25 2022, Anchal, Update, BHD, PR2 transmission calculation updated LO_power_vs_PR2_transmission.pdfPRC_Gain_vs_PR2_transmission.pdfPR2_Trans_Calc.ipynb.zip
                         Reply  Wed Jan 19 16:22:48 2022, Anchal, Update, BHD, PR2 transmission calculation updated PR2transmissionSelectionAnalysis.pdfPR2_Trans_Calc.ipynb.zip
                            Reply  Thu Jan 20 01:48:02 2022, Koji, Update, BHD, PR2 transmission calculation updated 
Message ID: 16583     Entry time: Thu Jan 13 17:10:55 2022     In reply to: 16575     Reply to this: 16584
Author: Anchal 
Type: Update 
Category: BHD 
Subject: PR2 transmission calculation 

I corrected the calculation by adding losses by the arm cavity ends times the arm cavity finesse and also taking into account the folding of the cavity mirror. I used exact formula for finesse calculation and divided it by pi to get the PRC gain from there. Attachment 3 is the notebook for referring to the calculations I made.

Note that using V6-704 would provide 35 mW of LO power when PRFPMI is locked and 113 uW for alignment, but will bring down the PRC Gain to 17.5.

pre-2010 ITM (if it is still an option) would provide 12 mW of LO power when PRFPMI is locked and 28 uW for alignment, but will keep the PRC Gain to 24.6.

I still have to do a curvature check on the V6-704 optic.

Attachment 1: LO_power_vs_PR2_transmission.pdf  28 kB  | Hide | Hide all
LO_power_vs_PR2_transmission.pdf
Attachment 2: PRC_Gain_vs_PR2_transmission.pdf  23 kB  | Hide | Hide all
PRC_Gain_vs_PR2_transmission.pdf
Attachment 3: PR2_Trans_Calc.ipynb.zip  1 kB
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