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ID Date Author Status Type Categorydown Location Title Text Attachments
  128   Fri Aug 12 17:48:28 2022 Ronic ChicheFixedreportlasers and opticsOptical room"ThomX" CELIA Amplifier commissionningthis afternoon, with Fabian, we did some
measurements on the 3rd stage.

finally we		   
  132   Fri Aug 19 16:31:11 2022 Manar AmerFixedreportlasers and opticsOptical roomAmplifier output Beam ProfileIn preparation to measure the output beam
profile from the amplifier at high power,
I have placed two wedge mirrors just before		  20220819_Setup.jpg 
  133   Fri Aug 19 16:36:18 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputThe previous Sbox telescope was dismantled
and the mechanical components cleaned.

its lenses are still in the mounts,		   
  134   Mon Aug 22 18:38:03 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputBeam divergence was measured using a method
called  "Focal		  Focal_length_divergence_method.pdfBeam_Profile_at_high_power_.jpgSBOX_CELIA_AMPLIFIER_Divergence_measurement.pdf 
  135   Mon Aug 22 18:39:13 2022 Manar AmerFixedreportlasers and opticsOptical roomAmplifier output Beam ProfileBeam divergence after amplifier 4.46 mrad

 

  
  136   Tue Aug 23 17:37:38 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputI placed a periscope to adjust the high
of the beam from the amplifier output from
~ 10 cm from the table to ~ 15 cm		  20220823_setup.jpg 
  137   Wed Aug 24 10:39:58 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputHere is a view of beam propagation in the
optical software : GaussianBeam

the red filled shape is the model		  Capture.PNGTelescope_AMPLI_CELIA_1.xml 
  138   Wed Aug 24 10:45:24 2022 Manar AmerFixedreportlasers and opticsOptical room2 Mirror Setup @ 216.6 MHzAdding information about the 2 mirror cavity
setup (plan - spherical)
that is currently installed.		  manip2miroirs.pptx2mirror_plan_shperical_beam_size.png 
  139   Tue Aug 30 17:48:39 2022 Ronic ChicheFixedinfolasers and opticsOptical room2nd stage CELIA amplifiertoday, we measured the 2nd stage CELIA
amplifier pump wavelength : 970-990 nm		  2nd_stage_pump_wavelength.jpg 
  140   Wed Aug 31 18:14:51 2022 Ronic ChicheFixedinfolasers and opticsOptical room2nd stage CELIA amplifiertoday we did several test with the Dichroic
shortpass mirror (Thorlabs DMSP1000) and
with a 10nm optical filter around 1030nm		  image_faisceau_multimode_@1030nm.PNG 
  141   Fri Sep 2 17:50:21 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputremoving the reading which is not correct
(wrong use of software)

redone a reading similar using		  Beam_Profile_Fit_using_gaussian_Beam.jpgBeam_Profile_Fit_using_gaussian_Beam.xml 
  142   Fri Sep 2 18:10:10 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputNote the
correct beam divergence is approximately
~ 2.3 mrad		  Ampli_Celia_2.3mrad_divergence_New_Telescope.jpgBeam_waist_at_injection_image.jpg 
  143   Mon Sep 5 18:06:53 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputAm adjustment on the lenses position to
have a smaller waist.

+ 250 mm @ 88 cm from amplifier		  20220905_Telescope_lense_placement.jpg 
  144   Tue Sep 6 17:47:40 2022 Ronic ChicheFixedissuelasers and opticsOptical roomunsuccessful telescope design :-(we wanted to calculate the right telescope
with 2 spherical lenses.

1) we have the FP cavity mode size		  image_at_z_being_40mm.pngbeam_fit_at_z_being_40mm.pngpropagation_fit.png 
  145   Wed Sep 7 18:57:20 2022 Manar AmerFixedreportlasers and opticsOptical roomTelescope / amplifier outputWe increased the power of the amplifier
up to 10 W to see if there is a change in
the beam shape at the injection point or		   
  146   Wed Sep 7 18:58:03 2022 Manar AmerFixedreportlasers and opticsOptical roomLocking Amplifier with Cavity Today we managed to observe the fundamental
mode and stabilize the scan on it until we
improved the alignment enough.		  20220907_00mode.jpg20220907_00mode_diameter.jpgScreenshot_2022-09-07_0_174654.pngScreenshot_2022-09-07_2_182520.png 
  147   Thu Sep 8 11:16:40 2022 Manar AmerFixedreportlasers and opticsOptical roomLocking Amplifier with Cavity Today, we played on the CEP but using the
I-tune input of the Menhir Laser (+/- 5V
maximal range).		   
  148   Thu Sep 8 13:39:03 2022 Manar AmerFixedreportlasers and opticsOptical roomLocking Amplifier with Cavity We played on the CEP using the USB command
"id0=xxxxx" of the Menhir.

we put id0=48650 and we improved		  Screenshot_2022-09-08_0_133245.png 
  149   Thu Sep 8 14:58:51 2022 Manar AmerFixedreportlasers and opticsOptical roomLocking Amplifier with Cavity We managed to lock the cavity by adding
the AOM , but the lock is still difficult
to stabilize.		  Screenshot_2022-09-08_2_144338.png 
  150   Thu Sep 8 18:28:51 2022 Manar AmerFixedreportlasers and opticsOptical roomLocking Amplifier with Cavity We wanted to increase the power of the
amplifier to measure the transmission output
at M2,		   
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