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ID Date Author Type Categorydown Subject Text Attachments
  2545   Mon Jan 25 16:30:37 2010 AlbertoUpdateABSL166 MHz sideband turned offI turned off the modulation at 166MHZ
becasue I don't need it if I'm only locking
the PRC.
  
  2546   Mon Jan 25 16:46:33 2010 AlbertoUpdateABSL166 MHz sideband turned off

    
        
  
  2547   Tue Jan 26 03:28:56 2010 ranaUpdateABSL166 MHz sideband turned off 
 You can turn the 166 off if
you want. MZ is unhappy after its turned
  
  2550   Wed Jan 27 11:02:30 2010 AlbertoUpdateABSLPRC Cavity Length I fitted the data from scanning
the PRC by changing the beat frequency of
the auxiliary laser beam with the PSL beam.
The
 2010-01-21_PRCtransmissivityVsFit.png2010-01-21_PRCtransmissivity_EntireFreqRange_VsFit.png 
  2553   Fri Jan 29 12:06:58 2010 AlbertoUpdateABSLMeasurement running today at lunch timeI just started a measuremtn that will be
running for the next hour or so. Please be
careful with the interferometer.
  
  2554   Fri Jan 29 13:14:49 2010 AlbertoUpdateABSLMeasurement running today at lunch time

    
        
  
  2576   Mon Feb 8 14:13:03 2010 AlbertoUpdateABSLPLL CharacterizationLately I've been trying to improve the
PLL for the AbsL experiment so that it could
handle larger frequency steps and thus speed
 2010-02-08_Old_PDH_Box_Filter_TF_gain_knob_0_Boost_OFF.png2010-02-08_PLL_OLG_gain_knob_0_Boost_OFF.png2010-02-08_PLL_Noise_Budget.png 
  2577   Mon Feb 8 14:56:17 2010 AlbertoUpdateABSLSuddenly a much better alignment of PRCI just aligned PRM and locked PRC and I
noticed that SPOB is much higehr than it
used to be. It's now about 1800, vs 1200
  
  2578   Mon Feb 8 15:01:46 2010 robUpdateABSLSuddenly a much better alignment of PRC


   
        
            
  
  2579   Mon Feb 8 15:41:51 2010 AlbertoUpdateABSLSuddenly a much better alignment of PRC

    
        
  
  2581   Tue Feb 9 09:07:06 2010 AlbertoUpdateABSLPLL Characterization

    
        
 2010-02-08_PRCtransmissivity_EntireFreqRange_VsFit.png 
  2582   Tue Feb 9 10:10:58 2010 AlbertoUpdateABSLback to analogI want to try to do the measurement with
the network analyzer used as local oscillator,
instead of the Marconis that I'm using now.
  
  2679   Thu Mar 18 10:46:51 2010 KojiUpdateABSLPLL reconstructedLast night (Mar 17) I checked the PLL
setup as Mott have had some difficulty to
get a clean lock of the PLL setting.
  
  2680   Thu Mar 18 12:27:56 2010 AlbertoUpdateABSLPLL reconstructed


   
        
            
  
  2681   Thu Mar 18 13:40:35 2010 KojiUpdateABSLPLL reconstructedWe use the current PLL just now, but the
renewal of the components are not immediate
as it will take some time. Even so we need
  
  2684   Thu Mar 18 21:42:26 2010 KojiUpdateABSLPLL reconstructedI checked the setup further more.

    I replaced the PD from
NewFocus 1GHz one to Thorlabs PDA255.
  
  2696   Mon Mar 22 22:11:26 2010 MottUpdateABSLPLL reconstructed 
 It looks like the PLL drifted
alot over the weekend, and we couldn't get
 IMG_0150.JPG 
  2697   Mon Mar 22 23:37:32 2010 MottUpdateABSLPLL reconstructed 
We have managed to lock the PLL to
reasonable stability. The RF input is attenuated
 2010-03-22_23.14.00.jpg2010-03-22_23.24.50.jpg 
  2703   Tue Mar 23 18:44:46 2010 MottUpdateABSLPLL reconstructed 
 After realigning and getting
the lock today, I tried to add in the SR785
 NPRO_PLL_freqresp.png 
  4832   Fri Jun 17 16:05:07 2011 kiwamuUpdateABSLLightWave out of MOPA box[Suresh / Kiwamu]
 We did the following things
:
 DSC_3139_small.png 
  4840   Mon Jun 20 11:38:49 2011 kiwamuUpdateABSLI-P curve of LightWave M126-1064-700The
I-P curve of the LightWave NPRO (M126-1064-700),
which was taken out from the MOPA box, was
 IP_curve.png 
  4841   Mon Jun 20 13:48:25 2011 KojiUpdateABSLI-P curve of LightWave M126-1064-700Hmm. Was the current within the operating
range? (i.e. Is it a 700mW laser or a 1W
one?)
  
  4842   Mon Jun 20 16:44:02 2011 steveUpdateABSLI-P curve of LightWave M126-1064-700 
 Put the serial numbers into
the elog. So we can identify the laser and
  
  4855   Wed Jun 22 15:24:10 2011 kiwamuUpdateABSLgot a laser controller for LightWavePeter
King came over to the 40m with a laser controller
and gave it to us.
 DSC_3150.JPGDSC_3153.JPG 
  4872   Thu Jun 23 22:59:45 2011 kiwamuUpdateABSLI-P curve of LWE The  IP_curve_small.png 
  4874   Fri Jun 24 00:13:24 2011 kiwamuUpdateABSLbeam profile measurement of LWEThe
beam profile of the LWE (LightWave Electronics)
NPRO was measured.
 beam_profile.png 
  4877   Fri Jun 24 07:49:23 2011 steveUpdateABSLI-P curve of LWE with serial numbers

    

       
            
  
  4917   Thu Jun 30 03:26:40 2011 kiwamuUpdateABSLstatus updateStatus
update of the absolute length (ABSL) measurement:
  
  4923   Thu Jun 30 14:11:55 2011 kiwamuUpdateABSLa photo of ABSL setup on the AP tableHere
is a picture of the latest ABSL setup at
the east part of the AP table.
 ABSLsetup.png 
  4925   Thu Jun 30 21:00:20 2011 kiwamuUpdateABSLfine alignment done(Just a quick report)
The
fine alignment of the ABSL laser injection
  
  4939   Tue Jul 5 16:09:54 2011 kiwamuUpdateABSLsome photos for ABSL setupHere
I show two photos of the latest ABSL (ABSolute
Length measurement) setup. 
 APtable.pngPSLtable.png 
  4940   Tue Jul 5 17:38:46 2011 kiwamuUpdateABSLABSL laser frequency-lockedIn this
past weekend the ABSL laser was successfully
 RFsetup.png 
  5079   Mon Aug 1 04:08:24 2011 kiwamuUpdateABSLArm length measurement : cavity kick techniqueI made some
attempts to measure the current length of
 ETMY_kick.png 
  5095   Tue Aug 2 16:55:21 2011 ranaUpdateABSLArm length measurement : cavity kick technique

    

       
            
 L.png 
  5117   Thu Aug 4 09:42:19 2011 KojiUpdateABSLABSL Laser shutter closedThe shutter of the ABSL laser is closed
for the vent work.
  
  8257   Fri Mar 8 12:57:57 2013 AnnalisaUpdateABSLBS installed on ITMY table Sendhil and I installed the S polarized
BS on the ITMY table to steer the NPRO beam
through the AR wedge and align it to the
  
  8258   Fri Mar 8 13:42:35 2013 JenneUpdateABSLBS installed on ITMY tableRe:  POY beam reduction.
We are able to lock the Yarm with
the beam / gain as it is.  I had thought
  
  8303   Mon Mar 18 12:02:12 2013 AnnalisaConfigurationABSLABSL setup for g-factor measurement of PRCMotivations
The ABSL
technique has been already used in the past
to measure the 
  
  8361   Wed Mar 27 21:53:21 2013 AnnalisaUpdateABSLBeat note of ATF auxiliary laserAfter measuring the beat note, the "Alberto"
NPRO auxiliary laser has been moved from
the PSL table to the POY table. Its beam
  
  8369   Thu Mar 28 23:00:30 2013 AnnalisaUpdateABSLBeat note of ATF auxiliary laser found 
The beat note for the ATF lab laser
has been found. 
  
  8495   Fri Apr 26 10:50:07 2013 AnnalisaUpdateABSLATF laser on PSLThe ATF NPRO auxiliary laser has been moved
on the PSL table. All the optics for beat
note measurement are in place and alignment
  
  8590   Thu May 16 08:32:05 2013 SteveUpdate40m upgradingETMY op table disabled 
All ETMY optical table electronics-
lasers-pds turned off, disconnected in order
 linguaa.jpg 
  8594   Fri May 17 00:32:32 2013 AnnalisaUpdate40m upgradingETMY - progress[Rana, Annalisa] 
 GREEN
 IMG_0536.JPG 
  8595   Fri May 17 15:38:51 2013 SteveUpdate40m upgradingETMY enclosure is on the way back 
 It  will arrive around 10 am Monday morning.
  
  8596   Fri May 17 16:06:14 2013 ranaUpdate40m upgradingETMY op table disabled 
 TODO:

    We need to replace all
  
  8597   Fri May 17 18:24:04 2013 AnnalisaUpdate40m upgradingETMY - progressI aligned the green beam into the Faraday.
I needed an HWP to have the right polarization
for the light entering the Faraday itself.
  
  8622   Thu May 23 00:16:32 2013 AnnalisaUpdate40m upgradingETMY - progress [Annalisa, Koji] 
 GREEN
 TransMonAndOplev.jpg 
  8637   Fri May 24 02:12:50 2013 AnnalisaUpdate40m upgradingETMY - Mode Matching for green 
 Mode
Matching calculation for green beam - Yarm
 ModeMatchingGreen.jpgModeMatchingGreenZoom.jpgXYpath.jpg 
  8638   Fri May 24 11:38:00 2013 KojiUpdate40m upgradingETMY - Mode Matching for greenI got confused. Is the mode calculation
in the cavity correct? 
Are you sure the wavelength in the
  
  8639   Fri May 24 12:50:25 2013 AnnalisaUpdate40m upgradingETMY - Mode Matching for green

    

       
            
  
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