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Entry  Fri Sep 21 09:59:09 2018, yuki, Configuration, ASC, Y end table upgrade plan Pic_CurrentSetup_AUXYgreen.jpegModeMatchingSolution_Current.pdfModeMatchingSolution_Current_Magnified.pdfModeMatchingSolution_Optimized.pdfModeMatchingSolution_Optimized_Magnified.pdf
    Reply  Sun Sep 23 19:32:23 2018, yuki, Configuration, ASC, Y end table upgrade plan Pic_NewSetup0923_AUXYgreen.jpegModeMatchingSolution_Result.pdfModeMatchingSolution_Magnified_0923.jpgpic0923_1.jpgpic0923_2.jpg
       Reply  Mon Sep 24 11:09:05 2018, yuki, Configuration, ASC, Y end table upgrade plan pic0924_1.jpg
       Reply  Tue Sep 25 18:08:50 2018, yuki, Configuration, ASC, Y end table upgrade plan 
          Reply  Thu Sep 27 14:02:55 2018, yuki, Configuration, ASC, PZT driver board verification PZTdriverSimulationDiagram.pdfPZTdriverSimulationResult.pdfPZTdriverPerformanceCheck_ResultOUT.pdfPZTdriverPerformanceCheck_ResultMON.pdfPZTdriver.asc
             Reply  Sun Sep 30 20:14:51 2018, yuki, Configuration, ASC, QPD calibration QPDcalibrationXaxis.pdfQPDcalibrationYaxis.pdf
                Reply  Mon Oct 1 12:03:41 2018, not yuki, Configuration, ASC, PZT driver board verification 
                   Reply  Mon Oct 1 13:33:55 2018, yuki, Configuration, ASC, QPD calibration Pic_QPDcalibration.jpg
                      Reply  Tue Oct 2 18:50:53 2018, yuki, Configuration, ASC, PZT mirror calibration PZTM1calibrationCH2.pdfPZTM1calibrationCH1.pdfPZTM2calibrationCH2.pdfPZTM2calibrationCH1.pdf
                         Reply  Wed Oct 3 18:15:34 2018, yuki, Configuration, ASC, AI board improvement TF_AIboard.pdf
                            Reply  Thu Oct 4 00:44:50 2018, yuki, Configuration, ASC, AI board improvement 
                               Reply  Thu Oct 4 22:15:30 2018, yuki, Configuration, ASC, Y-end table upgrade AUXYGreenLock20180921.jpgPic_FormerSetup.jpegPic_CurrentSetup1004.jpg
                                  Reply  Fri Oct 5 00:46:17 2018, Koji, Configuration, ASC, Y-end table upgrade 
                                     Reply  Fri Oct 5 17:32:38 2018, yuki, Configuration, ASC, Y-end table upgrade 
                                        Reply  Mon Oct 8 00:46:35 2018, yuki, Configuration, ASC, Y-end table upgrade 
                                  Reply  Fri Oct 5 17:47:55 2018, gautam, Configuration, ASC, Y-end table upgrade 
                                     Reply  Fri Oct 5 22:49:22 2018, yuki, Configuration, ASC, Y-end table upgrade 
                                        Reply  Sun Oct 7 16:51:03 2018, gautam, Configuration, LSC, Yarm triggering changed 
                                           Reply  Sun Oct 7 22:30:42 2018, yuki, Configuration, LSC, Yarm Green locking was recovered Pic_NewLayout1007.jpgYendGreenModeMatching.zip
                                              Reply  Tue Oct 9 23:03:43 2018, yuki, Configuration, LSC, Yarm Green locking was recovered Pic_1Y4.jpgPic_PZTcable.jpg
                                                 Reply  Wed Oct 10 12:38:27 2018, yuki, Configuration, LSC, All hardware was installed 
          Reply  Mon Oct 1 20:39:09 2018, gautam, Configuration, ASC, c1asy 
             Reply  Mon Oct 8 18:56:52 2018, gautam, Configuration, ASC, c1asx filter coefficient file missing 
             Reply  Tue Oct 9 16:05:29 2018, gautam, Configuration, ASC, c1tst deleted, c1asy deployed. CDSoverview_ASY.png
    Reply  Wed Oct 3 14:24:40 2018, yuki, Configuration, ASC, Y end table upgrade plan 
       Reply  Mon Oct 15 20:11:56 2018, yuki, Configuration, ASC, Y end table upgrade plan 
          Reply  Wed Oct 17 20:46:24 2018, yuki, Configuration, ASC, Y end table upgrade plan 
Message ID: 14212     Entry time: Sun Sep 23 19:32:23 2018     In reply to: 14205     Reply to this: 14214   14216
Author: yuki 
Type: Configuration 
Category: ASC 
Subject: Y end table upgrade plan 

[ Yuki, Gautam ]

The setup I designed before has abrupt gouy phase shift between two steering mirrors which makes alignment much sensitive. So I designed a new one (Attached #1, #2 and #3). It improves the slope of gouy phase and the difference between steering mirrors is about 100 deg. To install this, we need new lenses: f=100mm, f=200mm, f=-250mm which have 532nm coating. If this setup is OK, I will order them.

There may be a problem: One lens should be put soon after dichroic mirror, but there is little room for fix it. (Attached #4, It will be put where the pedestal is.)  Tomorrow we will check this problem again.

And another problem; one steering mirror on the corner of the box is not easy to access. (Attached #5) I have to design a new seup with considering this problem.

Quote:

One of the example for improvement is just adding a new lens (f=10cm) soon after the doubling crystal. That will make mode matching better (100%) and also make separation better (85 deg) (Attachments #4 and #5). I'm checking whether we have the lens and there is space to set it. And I will measure current power of transmitted main laser in order to confirm the improvement of alignment.

 

Attachment 1: Pic_NewSetup0923_AUXYgreen.jpeg  2.624 MB  Uploaded Sun Sep 23 23:28:52 2018  | Hide | Hide all
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Attachment 2: ModeMatchingSolution_Result.pdf  188 kB  Uploaded Sun Sep 30 22:51:31 2018  | Hide | Hide all
ModeMatchingSolution_Result.pdf
Attachment 3: ModeMatchingSolution_Magnified_0923.jpg  38 kB  Uploaded Sun Sep 30 22:53:23 2018  | Hide | Hide all
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Attachment 4: pic0923_1.jpg  399 kB  Uploaded Sun Sep 30 22:54:26 2018  | Hide | Hide all
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Attachment 5: pic0923_2.jpg  331 kB  Uploaded Sun Sep 30 22:54:36 2018  | Hide | Hide all
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