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
 List  |  Find  |  Login  |  Help 
Entry  Sat Jun 8 00:24:11 2013, Annalisa, Update, Green Locking, Y arm locked with green but bad mode matching 
    Reply  Mon Jun 10 21:39:26 2013, Annalisa, Update, Green Locking, Y arm locked with green but bad mode matching 
       Reply  Tue Jun 11 10:00:54 2013, nicolas, Update, Green Locking, Y arm locked with green but bad mode matching 
          Reply  Wed Jun 12 01:56:58 2013, Annalisa, Update, Green Locking, Y arm locked with green but bad mode matching waistVaryingLensPos.pdfgreen.JPGModeMatchingY.pdf
             Reply  Wed Jun 12 22:48:10 2013, Annalisa, Update, Green Locking, Y arm locked with green but bad mode matching 
                Reply  Wed Jun 12 23:06:33 2013, Jenne, Update, Green Locking, Y arm locked with green but bad mode matching 
                   Reply  Thu Jun 13 00:35:23 2013, Manasa, Update, Green Locking, Y arm locked with green but bad mode matching 
                      Reply  Thu Jun 13 10:57:36 2013, Annalisa, Update, Green Locking, Y arm locked with green but bad mode matching 
                Reply  Thu Jun 13 16:01:48 2013, nicolas, Update, Green Locking, Y arm locked with green but bad mode matching 
                   Reply  Thu Jun 13 23:28:40 2013, Annalisa, Update, Green Locking, Y arm locked with green but bad mode matching 
Message ID: 8696     Entry time: Wed Jun 12 22:48:10 2013     In reply to: 8695     Reply to this: 8697   8701
Author: Annalisa 
Type: Update 
Category: Green Locking 
Subject: Y arm locked with green but bad mode matching 

After restoring alignment I could see again strong 00 flashes (about 250-300 counts on ALS-TRY). So I locked the arm with IR and after enabling the PDH servo for the green locking, I also locked the green on the Y arm in 00 mode. Then I moved the two mode matching lenses to maximize the power into the 00 mode, but I didn't reach more than 30-35 counts.

Green power injected into the Y arm                    0.680mW

Green power reflected back                                  0.090mW

Green power transmitted on the PSL                  few uW

I would expect more power on the PSL table (maybe 10x more).

ELOG V3.1.3-