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ID Date Author Type Categoryup Subject Text Attachments
  5809   Fri Nov 4 13:53:33 2011 KatrinUpdateGreen LockingSHG temperature (YARM)

    
        
  
  5815   Fri Nov 4 21:15:38 2011 KatrinUpdateGreen LockingNew fiber coupler (YARM)63% coupling efficiency into the new fiber
collimator (Thorlabs XXXX) and the blue fiber.This
should be sufficient for a beat measurement
  
  5820   Sat Nov 5 04:30:21 2011 kiwamuUpdateGreen LockingRe:Passive summing box modificationsI think you also should check the PZT's
capacitance of the 700mW LightWave because
2.36 nF is the one for the 1W Innolight laser.
  
  5837   Mon Nov 7 17:38:18 2011 KatrinUpdateGreen LockingYARM length fluctuation   fluctuation.pngfluctuation_length.pngfluctuation_Hz_length.png 
  5838   Mon Nov 7 22:20:18 2011 kiwamuUpdateGreen LockingRe:YARM length fluctuationA nice plot !
Can you put another y-axis on the
right hand side of the same plot  in
  
  5846   Wed Nov 9 12:05:08 2011 KatrinUpdateGreen LockingYARM error signal and feedback signalerror signal = signal measured behind the
low-pass filter
feedback signal = output of the gain
 fluctuation_test.png 
  5852   Wed Nov 9 16:49:17 2011 kiwamuUpdateGreen LockingY end laser temperature with slow input connectedIndeed it is strange. I took a quick look
at it.
In
  
  5860   Thu Nov 10 05:54:23 2011 kiwamuUpdateGreen LockingBeat-note detected : PSL vs Y arm[Katrin / Kiwamu]
The beat-note
 DSC_3606_small.jpg 
  5872   Fri Nov 11 12:32:45 2011 KatrinUpdateGreen Lockingbeat PSL - YARM laser [Suresh, Katrin]
Measured frequency fluctuation of
the beat between PSL and YARM lasers.
 beat_psl_y.png 
  5874   Fri Nov 11 13:35:19 2011 KatrinUpdateGreen LockingFeedback to ETMY[Kiwamu, Katrin]
 20111111_freq_supp.png 
  5888   Mon Nov 14 17:01:14 2011 kiwamuUpdateGreen LockingALS feedback on MC2Leaving a note on the ALS feedback before
I forget:
The
  
  5890   Mon Nov 14 22:56:31 2011 kiwamuUpdateGreen LockingY end PDH lock : UGF at 17 kHz[Tomotada / Kiwamu]
 
The open loop transfer function of the Y
 YendOLTF.png 
  5893   Tue Nov 15 09:51:04 2011 ZachUpdateGreen LockingY end PDH lock : UGF at 17 kHz

    

       
            
  
  5894   Tue Nov 15 12:25:38 2011 kiwamuUpdateGreen LockingY arm ALS : beat-note free run fluctuationLocking activity last night :
 
The free run beat-note in 532 nm has been
 noise_budget.png 
  5914   Wed Nov 16 17:29:46 2011 kiwamuUpdateGreen LockingSome updates on the Y end green PDH
    

       
            
 Yarm_fluctuation.png 
  5920   Thu Nov 17 03:46:52 2011 kiwamuUpdateGreen LockingPSL doubling had been diabledI
found that the temperature controller of
the PSL doubling oven had been disabled.
  
  5929   Thu Nov 17 17:21:22 2011 kiwamuUpdateGreen LockingY end green PDH servo : it's okay

    

       
            
 servoTF.pngservofilter.pngerr_suppression.png 
  5930   Thu Nov 17 18:20:26 2011 kiwamuUpdateGreen LockingY arm ALS : 1st trial of noise budgetThe
noise budget on the Y arm ALS has begun.
 Yarm_ALS_2011Nov16.png 
  5937   Fri Nov 18 00:36:23 2011 ZachUpdateGreen LockingY-Arm PDH box modifiedI modified the Y-Arm PDH box (S/N 17)  pdh17_tf_vs_liso_11_17_11.png 
  5945   Fri Nov 18 11:28:39 2011 ranaUpdateGreen LockingY end green PDH servo : it's okay

    

       
            
  
  5946   Fri Nov 18 12:11:24 2011 ZachUpdateGreen LockingY end green PDH servo : it's okay

    

       
            
  
  5956   Sat Nov 19 00:47:24 2011 ZachUpdateGreen LockingY-Arm locked with PDH Box #17I installed the newly modified PDH  error_sig_m_11_18_11.png 
  5970   Mon Nov 21 16:08:04 2011 kiwamuUpdateGreen Locking2nd trial of Y arm ALS noise budget : broad band noise gone

    

       
            
 Yarm_ALS_2011Nov19.png 
  5978   Tue Nov 22 15:18:18 2011 kiwamuUpdateGreen Lockingbroad band noise depends on the gain of Y green PDH. and comaprator broken

    

       
            
  
  5980   Tue Nov 22 18:42:10 2011 kiwamuSummaryGreen LockingSome issues on the Y end green PDH locking[Rana / Kiwamu]
 As
a part of the ALS noise budgeting we took
  
  5983   Wed Nov 23 00:00:53 2011 ZachSummaryGreen LockingSome issues on the Y end green PDH locking

    

       
            
  
  5987   Wed Nov 23 13:53:36 2011 ZachUpdateGreen LockingSensor noiseThe in-loop Y-Arm error signal looks
equal to the beat note noise divided by the
Y-Arm OL gain in the broadband-noise region
 Yarm_ALS_2011Nov19_marked.png 
  6018   Sat Nov 26 19:07:40 2011 kiwamuSummaryGreen LockingAM trnasfer function of the Y end laser with doublin crystal

    

       
            
 AMTF_lightwave.pngAMTF_cailbrated.bod.zip 
  6024   Mon Nov 28 15:00:20 2011 kiwamuUpdateGreen LockingY arm ALS engaged
    

       
            
  
  6076   Tue Dec 6 02:57:44 2011 kiwamuUpdateGreen Locking1st trial of handing offI
succeeded in handing off the servo from that
of the ALS to IR-PDH.
 YarmALS.png 
  6080   Wed Dec 7 02:55:38 2011 kiwamuUpdateGreen Lockinglocking activity tonightNo
real progress.
  
  6102   Sat Dec 10 05:27:43 2011 kiwamuUpdateGreen Lockingstatus update of the Y arm green lockStatus
update of the Y arm green lock:
  
  6103   Sun Dec 11 17:28:36 2011 kiwamuUpdateGreen Lockingstatus update of the Y arm green lock


   
        
            
 ALSscreens.png 
  6120   Wed Dec 14 14:40:53 2011 steveUpdateGreen Lockingdelay line bnc cable specsThe existingly used used Pasternack Enterprices
RG58 C/U cable lenght ~ 140 ft and the specs
are here at Atm1
 rg58cu.jpgRG58-P.pdf 
  6126   Fri Dec 16 13:29:15 2011 kiwamuUpdateGreen LockingY arm noise budget : 60Hz line noise is killing usAlong with development of the automation
script, my goals last night were :

 (1) Take
 Yarm_ALS_2011DEC16.png 
  6127   Sat Dec 17 00:00:03 2011 kiwamuUpdateGreen Locking60 Hz line nose gone

    

       
            
  
  6133   Sun Dec 18 18:45:22 2011 kiwamuUpdateGreen LockingY arm ALS : time series and noise budgetAs I said in the previous entry (#6126)
my current goals were :
 time_series.pngYarm_ALS_2011DEC17.png 
  6140   Wed Dec 21 03:38:14 2011 kiwamuUpdateGreen LockingY arm ALS : automation script 80 % doneScripting
of the single arm automated lock script is
80% done.
  
  6141   Wed Dec 21 04:29:01 2011 kiwamuUpdateGreen LockingPower Recycled Single ArmI made the
first trial of locking a Power-recycled single
 time_series.png 
  6144   Wed Dec 21 16:55:30 2011 kiwamuUpdateGreen LockingPower Recycled Single Arm I did some brief parameter checks
for the power-recycled single arm which I
have done yesterday.
The
  
  6145   Thu Dec 22 19:15:22 2011 kiwamuUpdateGreen Lockingrearrangement of PSL green optics As
planed (#6143
  
  6147   Fri Dec 23 01:07:41 2011 kiwamuUpdateGreen Lockingrearrangement of PSL green optics part IIAfter
I did a fine alignment of the X green beam
path on the PSL table, the X arm beat-note
 newLayout.png 
  6154   Wed Dec 28 14:13:16 2011 kiwamuUpdateGreen LockingALS feedback on MC2I
added an ALS feedback path on the MC2 suspension
and this path will enable us to stabilise
 MC2_ALS.png 
  6155   Fri Dec 30 02:16:48 2011 kiwamuUpdateGreen LockingYarm ALS : high frequency noise reducedThe
high frequency noise, which has been a dominant
noise above 30 Hz in the Y arm ALS (
 Yarm_ALS_2011Dec29.png 
  6214   Fri Jan 20 15:59:02 2012 kiwamuUpdateGreen LockingY arm ALS noige budgetOne of
my goals in this week is : measurement of
 Yarm_ALS_2012Jan19.png 
  6215   Fri Jan 20 16:24:50 2012 kiwamuUpdateGreen LockingY arm ALS : time seriesHere is
a new time series plot showing how stably
 time_series.png 
  6216   Fri Jan 20 17:05:59 2012 ranaUpdateGreen LockingY arm ALS : time series      
           
  
  6220   Tue Jan 24 18:11:13 2012 kiwamuUpdateGreen LockingY arm ALS noise budgetI
did some more stuff for the Y arm ALS and
updated the noise budget:
 Yarm_ALS_2012Jan19.pngnewservo.png 
  6221   Wed Jan 25 02:59:46 2012 kiwamuUpdateGreen LockingY arm ALS noise budgetSurprisingly
increasing the gain of the whitening filter
didn't improve the noise curve.
  
  6223   Wed Jan 25 17:32:03 2012 steveUpdateGreen Lockinggeen pointing into y arm is misalignedI  placed an other Y2-LW-1-2050-UV-45P/AR
steering mirror into the beam path of the
green beam launching in order to avoid the
  
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