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ID Date Authordown Status Type Category Location Title Text Attachments
  41   Wed Jun 12 12:07:11 2019 Loïc AmoudryFixedreportmechanics | lasers and opticsOtherAmplifier mission BordeauxM² mesuré à 10W.
M²x = 1.17
M²y = 1.14		  Ampli_ThomX.PNGM2_ThomX.png 
  42   Wed Jun 12 17:49:20 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomPolarizationPolariztion measured with Input vertically/horizontally polarized
(~100% DOLP)

- Transmission (P4) locked on cavity		  Polar_horiz_trans_P4.PNGPolar_vert_trans_P4.PNGPolar_vert_input.PNG 
  47   Thu Jul 4 18:28:55 2019 Loïc AmoudryFixedissuelasers and opticsOptical roomOnefive 33MHz unmodelockedOscillator randomly unmodelocked on 3rd
july afternoon (during oscillator power
measurement, maybe a reflection from the		   
  48   Thu Jul 4 18:30:39 2019 Loïc AmoudryFixedreportlasers and opticsOptical room2nd stage output power validated Onefive output power : 28mW
Power before fiber injection :
7.8mW		  190704_2ndstage6A_spectrum.PNG 
  49   Mon Jul 29 17:15:35 2019 Loïc AmoudryFixedinfomechanics | lasers and opticsOptical roomSpin coater air supply removed and front panel changedSpin coater firstly needed vacuum and air
supply. The air supply being useless for
our experiments, it has been disabled.		  1.jpg2.jpg3.jpgfront_panel.png 
  55   Tue Sep 3 18:06:29 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomMirrors sent to LMAMirrors have been sent today to LMA for
cleaning and maybe annealing (recuit). 3
ULE of ThomX and the fused silicate for injection		   
  56   Fri Sep 6 14:48:14 2019 Loïc AmoudryFixedreportmechanics | vacuumOptical roomPrimary vacuum to check dustThe cavity has been cleaned then put under
primary vacuum (primary pump without vacuum
flow control). Dusts presence was checked		  Image3.jpgImage6.jpg 
  57   Fri Sep 6 14:59:00 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomLMA cleaning techniqueChristophe MICHEL told us more precise
informations about spin coater cleaning.

They always clean with pur water		   
  58   Thu Sep 12 16:19:26 2019 Loïc AmoudryFixedreportmechanics | lasers and opticsOptical roomCavity dust source checkSeveral experiments have been done in order
to check the potential source of dust in
the ThomX cavity. For each step, we look		   
  60   Fri Sep 27 10:43:17 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomNew Suprasil mirror from LMA19/09/2019 : email from Chrisophe Michel
about AR coating of LMA mirrors after reading
that Ta2O5 layers can be damaged in vacuum		   
  62   Mon Sep 30 11:20:48 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomDiffusion ULE spherical mirror (S3) vs Fused Silicate injection planar mirror (P1)Observation made with IR Beam Viewer: 

The observation of P1 and S3 simultaneously
while locking shows much higher diffusion		  diffusion.jpg 
  64   Thu Oct 3 13:49:58 2019 Loïc AmoudryFixedinfomechanicsOptical roomPneumatic valvesFrederic and Manu from vacuum group came
this morning to fix again the pneumatic valves
which had a leak again.		   
  65   Thu Oct 3 13:53:44 2019 Loïc AmoudryFixedreportvacuumOptical roomCavity under vacuum The cavity is right now at 6.5e-8 mbar
(turbo pumps on for 1 night and ionic pumps
for 3h), primary pumps and turbo pumps are		   
  66   Thu Oct 3 14:00:13 2019 Loïc AmoudryFixedissuecablingOptical roomElectrical trouble (disjunction)The circuit breaker on ThomX cavity drops
@1.5-1.8kW when we turn on 1/2nd
stage of the amplifier or 3rd stage of the		   
  67   Thu Oct 3 18:00:10 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomThomX amplifier M2The ThomX M2 has been measured between
1.5-1.6 for x and y		  Fit_matlab_M2.PNG 
  68   Wed Oct 9 10:08:24 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomImprovement holder amplifier fiberWe've added a clamp in the 3rd stage
to prevent the pump fiber from moving and
tilting (it was tilting to the left).		  1.png2.png 
  69   Wed Oct 9 10:10:01 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomFree Spectral Range (FSR)FSR is 33.347 MHz @1e-8 mbar

 		   
  70   Wed Oct 9 10:16:24 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomFiber injection and onefive output powerFiber injection is finished with the new
ThomX stretching CVBG in double pass (+50%
injection power compared to K-BOX CVBG in		   
  71   Wed Oct 9 11:41:11 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomOnefive spectrum and CVBG spectrumThe Onefive spectrum has shifted a little
bit to lower lambda. It's still enough
for the experiment (3mW injection of ampli		  191008_spectrumbeforecvbg.PNG191008_spectrumaftercvbg.PNG191008_beamshapeaftercvbgthomx.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 
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