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ID Date Author Status Type Categorydown Location Title Text Attachments
  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 
  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 
  79   Wed Nov 13 15:05:18 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomAmplifier output power  




 courbedichro.PNG 
  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 
  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.		   
  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 
  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.

  
  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 
  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 
  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 
  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.		   
  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 
  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 
  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 
  95   Wed Feb 26 10:38:37 2020 Ronic ChicheFixedinfolasers and opticsOptical roomOptical spectrum analyzer resolutionThe Koheras @0.5mW is directly connected
with fibers FC/APC -> FC/PC to the Avantes
optical spectrum analyzer.		  Capture.PNG 
  96   Wed Feb 26 11:05:09 2020 Ronic ChicheFixedinfolasers and opticsOptical roomOptical spectrum analyzer resolutionSame measurement with Koheras @100mW and
using fiber coupling lenses between Koheras
and Avantes OSA.		  Capture2.PNG 
  97   Wed Feb 26 16:48:02 2020 Ronic ChicheFixedinfolasers and opticsOptical roomOptical spectrum before and after CVBGMeasurement of the optical spectrum with
Avantes OSA before (1st picture) and after
CVBG (2nd picture) with 2nd stage on the		  OSA_after_amplifier_CFBG_and_before_CVBG.PNGOSA_after_amplifier_CFBG_2_CVBG.PNG 
  98   Fri Feb 28 09:20:37 2020 Ronic ChicheNot Fixedissuelasers and opticsOptical roomAmplifier laser diodes issueThis is a long time issue for the ThomX
amplifier : on the 4 pumping diodes available,
the 1st diode has a higher temperature than		  Problem_TEC.PNGparam_diode_1.csvparam_diode_2.csv 
  99   Fri Feb 28 17:44:12 2020 Ronic ChicheFixedreportlasers and opticsOptical roomPointing stability with CVBGYesterday, with Titouan, we made some measurements
on pointing stability of the laser beam after
amplifier and CVBG.		  Pointing_stability_without_airflow_and_no_one_walking_around.pngPointing_stability_without_airflow_vs_amplifier_current.png 
  100   Tue Jun 16 13:03:52 2020 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse measurement after confinementAfter 3 months without human presence,
finesse has been measured 3 times with
average optimization: 		  sweep_parameters.PNGtek00007.pngtek0009CH1.isftek0010CH1.isftek0011CH1.isf 
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