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Entry  Thu Apr 24 02:12:05 2014, Jenne, Update, LSC, Locking without TRY TRX_avg_40cts_POPDC_avg_200cts.pngLockloss_PRCL_350Hz.pngLockloss_DARM_20Hz.png
    Reply  Thu Apr 24 11:19:50 2014, Koji, Update, LSC, Locking without TRY 
       Reply  Thu Apr 24 14:00:42 2014, Jenne, Update, LSC, Locking without TRY REFLDC_1sec.pngREFLDC_3peaks.pngREFLDC_1peak.pngREFLDC_1peak_zoom.png
          Reply  Mon Apr 28 13:18:18 2014, Jenne, Update, LSC, LSC offsets script modified 
Message ID: 9848     Entry time: Thu Apr 24 14:00:42 2014     In reply to: 9847     Reply to this: 9868
Author: Jenne 
Type: Update 
Category: LSC 
Subject: Locking without TRY 

Here is 1 second of data, with REFLDC, POPDC and TRX:

REFLDC_1sec.png

Here is a zoom of the first 3 big peaks in TRX.  The weird jumps at the beginning of each TRX peak are due to the triggered switching between the Thorlabs trans PD and the QPD trans PD.  Clearly we need to work on their relative normalizations.  There are also little jumps after each peak as the triggering sends the signal back to the Thorlabs PD.

REFLDC_3peaks.png

Here is a zoom of the single big peak about halfway through the 1 second of data:

REFLDC_1peak.png

And here is a zoom of the tail of that peak.  It looks to me like we want to start thinking about using REFL DC when our transmitted powers are around 2 counts.  We could do as soon as 1 count, but 2 is a little farther into the dip.

REFLDC_1peak_zoom.png

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