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ID Date Author Status Type Category Location Title Text Attachments
  94   Mon Feb 24 16:28:52 2020 Ronic ChicheFixedreportlasers and opticsOptical roomBeam pulse durationLast Thursday (20th of February), Loïc
and Titouan realigned the stretcher CVBG
to its nominal angle and they used an interferometric		  Interferences_pulse_width.png 
  93   Wed Feb 19 17:21:28 2020 Loïc AmoudryFixedreportlasers and opticsOptical roomPowerup with 2.5ps pulsesA power up has been performed on ThomX
until 65kW intracavity power. We didn't
see any modes but stored power was really		  report.PNGtek00004.png4A.PNG 
  92   Tue Feb 18 12:24:00 2020 Loïc AmoudryFixedreportlasers and opticsOptical roomThomX Locked with CVBGsThomX has been locked with a new telescope
while using compression CVBGs.
Coupling is ~50-55% and lock is stable.		  tek00001.pngtek0002CH1.isftek0002CH2.isftek0002CH3.isftek0002CH4.isf 
  91   Fri Feb 14 18:02:37 2020 Loïc AmoudryFixedreportlasers and opticsOptical roomTelescope for compressors and ThomXCVBGs telescope is done with w ~= 1mm. 

ThomX telescope is done with w
~= 2.3mm in x and y.		   
  90   Fri Feb 14 09:26:07 2020 Ronic ChicheFixedreportlasers and opticsOptical roomBeam pulse durationYesterday, Loïc put the CVBG's
back to their specified angles.

We used an interferometric technique		  interferences_pulse_duration.png 
  89   Wed Feb 12 17:43:43 2020 Ronic ChicheFixedreportlasers and opticsOptical roomBeam pulse durationYesterday, Loic installed a telescope before
CVBG's to reduce the spot size on CVBG's
and reduced the incident angle 0.5-1°		  pulse_width.png 
  88   Fri Feb 7 14:46:55 2020 Ronic ChicheFixedreportlasers and opticsOptical roomBeam pulse durationWe installed the 2 CVBG for compression
after the amplifier.
We used an interferometric technique		  interferences.avipulse_duration.png 
  87   Tue Feb 4 14:39:56 2020 Loïc AmoudryFixedinfolasers and opticsOptical roomOnefive output powerOnefive output power measured today. 3.52
mW with OD1 filter ==> ~35mW.

  
  86   Thu Nov 28 10:40:29 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomCVBG reference and Eric Cormier calculationThe Stretcher is the "D 24-02-II",
it must be used in double path before the
amplifier injection.		  compresseurs.jpgEtireur.jpgcalcul_Eric.jpg 
  85   Wed Nov 27 13:53:57 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomOnefive output powerThe pump voltage has been increased few
days ago when looking for a modlock of the
laser.		   
  84   Tue Nov 26 16:35:39 2019 Ronic ChicheFixedissuelasers and optics | detectors and electronicsOptical room30Hz noise issueThe 30 Hz noise issue has been solved !

It came from translation stage
of P1 and/or P4.		   
  83   Tue Nov 26 16:21:27 2019 Loïc AmoudryFixedissuevacuumOptical roomPneumatic valvesThe pneumatic valves are now plugged on
the university air network.
The air valve is fully openned for		   
  82   Tue Nov 26 16:11:52 2019 Ronic ChicheFixedissuemechanicsOptical roomFirst Lock with 2nd satge of amplifier : Motor issue ? The 500 ms noise disapeared. We had to
disable the "power save" mode of
the smaract translation stage. AND turn OFF		   
  81   Fri Nov 22 17:56:56 2019 Ronic ChicheFixedissuelasers and optics | detectors and electronicsOptical room30Hz noise issuesince some days, we observe the cavity
is difficult to lock and a strange 30Hz noise
has appeared on the PZT signal which normally		   
  80   Thu Nov 21 11:37:13 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomOnefive Origami 33MHz specsBeam Size Onefive added




 beam_size.xlsxBeam_size_Onefive_33.rar 
  79   Wed Nov 13 15:05:18 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomAmplifier output power  




 courbedichro.PNG 
  78   Wed Nov 13 14:44:56 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomAmplifier output power The ouput power of the ThomX amplifier
has been measured as a function of the 3rd
stage pumps current (0A is 1st and 2nd stage		  dichroic.PNGcourbe.PNGpower.xlsx 
  77   Wed Nov 6 16:11:12 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomSpherical mirrors at closest position. FSR, finesse and beam size.The spherical mirrors are at the closest
position to get a FSR ~=33.3435 MHz. Planar
mirrors are at the largest position.		  data_finesse.isffit_finesse_17000.pngbeamsize.PNGfit.PNG 
  76   Tue Oct 22 09:10:45 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomFirst mode degeneracy on ThomXYesterday, we've observed the first
degeneracy on ThomX cavity at ~115 kW stored.
The shape of the stored power on the oscilloscope		  degenere.PNGdegenere2.PNGdegenere3.PNGtek0000.png100kWThomX.png 
  75   Fri Oct 11 18:49:00 2019 Ronic ChicheFixedinfodetectors and electronicsOptical roomNew locking schemeBefore, the locking scheme was to produce
an error signal with the PDH box, send its
output to the electronic amplifier box and		   
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