40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Thu Mar 7 12:39:12 2013, Jenne, Update, Locking, Erudite discussion on PRMI locking 
    Reply  Thu Mar 7 16:55:28 2013, Koji, Update, Locking, Erudite discussion on PRMI locking 
    Reply  Tue Mar 26 00:17:47 2013, Jenne, Update, Locking, REFL pickoff fraction 
    Reply  Tue Mar 26 11:08:03 2013, Jenne, Update, Locking, PRMI locking should be possible - let's get it done! PRMI_SBres_plot_allTheFs_LowRes.pngLSC_sigmatrix_PRMI.pdf
Message ID: 8348     Entry time: Tue Mar 26 00:17:47 2013     In reply to: 8250
Author: Jenne 
Type: Update 
Category: Locking 
Subject: REFL pickoff fraction 

To see how much of the light that comes out of the REFL port actually goes to the PDs, I measured the power immediately after leaving the vacuum (~575mW) and in front of REFL11 (~5mW) and REFL55 (~6mW).

So, 0.01 of the power leaving the vacuum actually goes to the REFL PDs. This number will be useful when calculating the actual signals (in volts) that we expect to see.

ELOG V3.1.3-