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ID Date Author Type Categoryup Subject Text Attachments
  2794   Mon Apr 12 20:48:51 2010 Aidan, MottSummaryGreen LockingTemperature sweep of the Innolight: df/dT ~ 3.3GHz/K

    
        
 Innolight_temp_sweep.pdfInnolight_Temp.m 
  2797   Tue Apr 13 12:39:51 2010 Aidan, MottSummaryGreen LockingTemperature sweep of the Innolight: df/dT ~ 3.3GHz/KPlease put those numbers onto wiki somewhere
at the green page or laser characterization
page.
  
  2799   Tue Apr 13 19:53:06 2010 MottUpdateGreen LockingPZT response for the innolight and lightwave 
 I redid the PZT Phase Modulation
measurement out to 5 MHz for both the Innolight
 6x 
  2804   Sat Apr 17 18:30:12 2010 ZachUpdateGreen Locking1W NPRO output profileNOTE:
This measurement is wrong and
only remains for documentation purposes.
 profile_fit_4_17_10.png 
  2807   Mon Apr 19 11:31:04 2010 AidanUpdateGreen Locking1W NPRO output profile

    

       
            
  
  2809   Mon Apr 19 16:27:13 2010 AidanUpdateGreen LockingRaicol crystals arrived and we investigated themJenne, Koji and I opened up the package
from Raicol and examined the crystals under
the microscope. The results were mixed and
  
  2816   Tue Apr 20 11:14:31 2010 AidanUpdateGreen LockingRaicol crystals arrived and we investigated them 
 Here
is Crystal 724 polished side 2 with all photos
  
  2818   Tue Apr 20 13:02:14 2010 ZachUpdateGreen Locking1W NPRO output profileEDIT:
I used an IFIT (inverse fast idiot transform)
to change the x-axis of the plot from Hz
 profile_fit_4_19_10.png 
  2819   Tue Apr 20 13:37:36 2010 JenneUpdateGreen Locking1W NPRO output profile


   
        
            
  
  2821   Tue Apr 20 19:37:02 2010 KojiUpdateGreen Locking1W NPRO output profileBeautiful fitting.

  
  2823   Wed Apr 21 10:09:23 2010 kiwamuUpdateGreen Lockingwaist positon of Gaussian beam in PPKTP crystalsTheoretically the waist position of
a Gaussian beam (1064) in our PPKTP crystal
differs by ~6.7 mm from that of the incident
 focal_positin_edit.png 
  2835   Fri Apr 23 18:30:49 2010 Aidan, Jenne, KojiSummaryGreen LockingGreen means GO!Jenne, Koji and I assembled the Covesion
Oven today, inserted a PPKTP crystal from
Raicol, aligned the crystal to a 50mW focus
 IMG_2405.jpgIMG_2417.jpg 
  2843   Mon Apr 26 11:14:04 2010 KojiUpdateGreen LockingTemperature scan for PPKTPI scanned the temperature of the crystal
oven on Friday night in order that we can
find the optimal temperature of the crystal
 SHG_pow.png 
  2850   Tue Apr 27 14:18:53 2010 kiwamuUpdateGreen Lockingwaist positon of Gaussian beam in PPKTP crystalsThe mode profile of Gaussian beams in
our PPKTP crystals was calculated.
I
 mode_in_PPKTP.png 
  2907   Mon May 10 20:03:22 2010 KevinUpdateGreen LockingGreen Laser Beam ProfileKiwamu and Kevin measured the beam profile
of the green laser by the south arm ETM.
The following measurements were made
 vbp.jpgvbp_residuals.jpghbp.jpghbp_residuals.jpg 
  2909   Mon May 10 22:25:03 2010 KojiUpdateGreen LockingGreen Laser Beam ProfileHey, what a quick work!
But,
wait...
  
  2910   Tue May 11 14:39:17 2010 AidanUpdateGreen LockingGreen Laser Beam Profile 
 Here's a photo of the set-up
used. The beam profile is measured relative
 P5110057_beams.jpg 
  2912   Tue May 11 17:02:43 2010 KevinUpdateGreen LockingGreen Laser Beam Profile 

 vbp.jpgvbp_residuals.jpghbp.jpghbp_residuals.jpg 
  2915   Wed May 12 02:35:13 2010 Koji, Rana, KiwamuUpdateGreen LockingReflection from ETM and ITM !We succeeded in getting
the reflected green beam from both ITMY and
  
  2916   Wed May 12 03:42:38 2010 KojiUpdateGreen LockingGreen Laser Beam ProfileStrange.
I thought the new  result became twice of
the first result. i.e. w0=32um or so. 
  
  2917   Wed May 12 03:52:54 2010 KojiUpdateGreen LockingReflection from ETM and ITM !I could not understand this operation.
Can you explain this a bit more?
It sounds different from the standard
  
  2919   Wed May 12 09:16:29 2010 steveUpdateGreen LockingReflection from ETM and ITM ! 
 Now I know why Rana was wearing
his bright green pants yesterday. It is nice
  
  2920   Wed May 12 10:33:32 2010 kiwamuUpdateGreen LockingRe: Reflection from ETM and ITM !The procedure you wrote down as a standard
is right.   I explain reasons why
we didn't do such way. 
  
  2921   Wed May 12 12:25:11 2010 KojiUpdateGreen LockingRe: Reflection from ETM and ITM !???
I still don't understand. What principle
are you rely on?
  
  2930   Fri May 14 08:18:46 2010 steveUpdateGreen LockingReflection from ETM and ITM !I stopped AWG  1 Hz drive to ITMYs.
ITMXe was also driven or oscillating. ITMXe
damping was off, so I turned it on. It did
 itmx1hzos.jpg 
  2933   Fri May 14 16:14:37 2010 KevinUpdateGreen LockingGreen Laser Beam Profile

    
        
 profile.pngresiduals.png 
  2936   Sun May 16 12:51:08 2010 kiwamuUpdateGreen Lockingreflected beam at PDMode matching
to the cavity has been done.
  
  2937   Sun May 16 19:25:45 2010 KojiUpdateGreen Lockingreflected beam at PDDon't
make a short cut. The beam size at a single
place does not tell you anything. 
  
  2959   Thu May 20 13:29:40 2010 kiwamuUpdateGreen Lockingmode profile at PPKTP crystal I measured again the mode profile
of the beam going through the PPKTP crystal
by using the beam scan.
 PPKTPmode.png 
  2960   Thu May 20 14:18:59 2010 kiwamuUpdateGreen Lockingmode profile of 40m cavityThe mode
profile of the green beam going through 40m
 MMT40mcavity.png 
  2980   Tue May 25 09:12:46 2010 kiwamuConfigurationGreen Lockingeffect from air conditionerWe should
completely turn off the air conditioner when
 green_spot.png 
  2988   Wed May 26 04:14:21 2010 kiwamuUpdateGreen LockinglockedI guess
I succeeded in locking of the cavity with
 OLTF_endPDH.png 
  2992   Wed May 26 14:38:02 2010 KojiUpdateGreen LockinglockedCongratulation! Probably you are right,
but I could not get this is a real lock or
something else.
  
  2995   Wed May 26 18:54:55 2010 AidanSummaryGreen LockingMounted Crystal 724 in the Doubling OvenAndri and I mounted the Raicol Crystal
#724 in one of the new Covesion Ovens. The
procedure was the same as before - see
  
  2997   Thu May 27 02:22:24 2010 kiwamuUpdateGreen Lockingmore details Here are some more plots
and pictures about the end PDH locking with
 stimes.pngspectrum.pngETMX_small.png 
  2999   Thu May 27 09:43:50 2010 ranaUpdateGreen Lockingmore details

    

       
            
  
  3000   Thu May 27 10:30:32 2010 kiwamuHowToGreen LockingPSL setup for green locking I
leave notes about a plan for the green locking
  
  3004   Fri May 28 07:13:05 2010 AlbertoFrogsGreen LockingSR785 found abandoned next to the workbenchesA poor lonely SR785 was found this morning
roaming around in the lab in evident violation
of  the fundamental rule which requires all
  
  3059   Wed Jun 9 11:13:11 2010 kiwamuUpdateGreen Lockinglock with PDH boxA
progress on the end PDH locking :
  
  3065   Fri Jun 11 11:54:42 2010 kiwamuUpdateGreen Lockingend PDH with thermal feedbackA thermal
feedback was installed to the end PDH locking
 LPF.pngthermal_feedback.png 
  3066   Fri Jun 11 13:32:28 2010 KojiUpdateGreen Lockingend PDH with thermal feedbackGJ! 

  
  3092   Sun Jun 20 18:28:25 2010 kiwamuUpdateGreen LockingRe: lock with PDH boxOn the wiki I summarized about the modification
of the PDH box which is currently running
on the end PDH locking. 
  
  3112   Thu Jun 24 01:02:34 2010 Sharmilla, Rana and KiwamuUpdateGreen Lockinga channel for PPKTP temperatureWe added
a channel on c1psl in order to monitor the
  
  3113   Thu Jun 24 06:49:29 2010 AidanUpdateGreen Lockinga channel for PPKTP temperatureIs this a setpoint temperature that we
can change by writing to the channel or is
it a readout of the actual temperature of
  
  3122   Fri Jun 25 20:32:30 2010 kiwamuUpdateGreen Lockinggreen power on the PSL tableThe power
of the green beam generated on the PSL table
 optical_power.png 
  3188   Fri Jul 9 12:25:25 2010 kiwamuUpdateGreen LockingSHG on PSL tableIn order
to increase the green power on the PSL table,
 PSL_doubling.png 
  3195   Mon Jul 12 13:16:53 2010 kiwamuUpdateGreen LockingPZT feedback at X endThe
feedback signal going to the laser PZT at
the X end station was measured in 
 arm_day_night.png 
  3203   Tue Jul 13 11:00:29 2010 kiwamuUpdateGreen LockingSHG on PSL table : optimum temepratureThe optimum
temperature for the doubling crystal on the
 power_temp.png 
  3204   Tue Jul 13 11:20:07 2010 DmassUpdateGreen LockingSHG on PSL table : optimum temeprature 
 It seems like you might inherit
an offset by using step (3) b/c of the temperature
  
  3262   Wed Jul 21 19:11:18 2010 DmassUpdateGreen LockinglockedWhat did you use to filter the 2f components
from your error signal? A homemade low pass
or what?
  
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