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ID Date Author Status Type Category Location Titledown Text Attachments
  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 
  228   Tue Dec 3 13:51:52 2024 Ronic ChicheFixedinfoutilitiesOptical roomoptical table cleaningthis morning with Alice and Daniele, we
removed all the optics elements and equipments
from the SBOX optical table and started to
 Oxydation.jpg20241203_113105.jpg20241203_125359.jpg 
  229   Fri Dec 6 16:59:57 2024 Ronic ChicheFixedinfoutilitiesOptical roomoptical table cleaningthis afternoon, we checked the dust meter
which is at 0 for 1 and 5µm dust particles
but ~ 2000-3000 for 0.3µm particles.
  
  231   Tue Mar 4 18:33:26 2025 Ronic ChicheFixedinfoutilitiesOptical roomoptical table cleaningnow, it seems the table is clean enough
(dust meter counts 0 particles) to install
a 2 mirrors FP-cavity.
  
  175   Thu Dec 7 09:30:03 2023 Ronic ChicheFixedinfomechanics | lasers and optics | detectors and electronics | softwareOptical roomnew setup for the 160MHz Menhir oscillatorfrom the begining of the week, Xinyi, Aurélien,
Viktor and myself started to install a new
setup for the Menhir 160MHz oscillator.
 Plan_SBOX_@_160MHz.pptxImplantation_disymmetric.mIMG_20210519_155329.jpg 
  244   Tue Sep 9 21:23:11 2025 Alice RenauxUnder Processreportlasers and opticsOptical roomnew cavityYesterday, we changed the M1 mirror to
a 161185 Gamma
Factory mirror of transmission 460ppm, the
  
  245   Wed Sep 10 11:27:45 2025 Alice RenauxUnder Processreportlasers and opticsOptical roomnew cavityThe 2-mirrors cavity has 460ppm of transmission
for M1 and 10ppm for M2 which should exhibit
a Finesse around 13400.
 Finesse.png 
  163   Tue Sep 13 19:31:14 2022 Manar AmerFixedreportlasers and opticsOptical roomliPower storage In CavityAfter changing the mirror M1 and cleaning
the 2 mirrors

They were placed in the cavity
 Screenshot_2022-09-13_0_184445.png 
  220   Mon May 6 18:38:18 2024 Xinyi LuFixedinfolasers and opticsOptical roomhigh-power experiments of 2-mirror cavityToday, Ronic, Daniele and I redo the high-power
2-mirror cavity experiments, and the results
are shown in the table (Figure 1 and
 record_20240506.pngrecord20240506.xlsxScreenshot_2024-05-06_11_145855-500kW.pngScreenshot_2024-05-06_1_112931-14kW.png 
  221   Thu May 16 18:51:17 2024 Xinyi LuFixedinfolasers and opticsOptical roomhigh-power experiments of 2-mirror cavityhere is a Matlab code to try to optimize
the telescope for a hot cavity,
taking into account the thermal lens
 telescope_optimization_for_700kW.pdf2_Mirrors_-_216MHz_-_700kW_cavity_setup.xmlcavity_2M_dynamic_thermal_effect.m 
  222   Fri May 17 15:02:01 2024 Xinyi LuFixedinfolasers and opticsOptical roomhigh-power experiments of 2-mirror cavityHere's a summary of our experiment
last week:

The initial telescope position:
 6x 
  36   Fri Dec 13 18:28:00 2019 Ronic ChicheFixedreportlasers and opticsOptical roomfirst data with 3A on the 3rd stageToday, at 3A on the 3rd stage, we saw some
HOM effects.
the transmissions is about 100mW which
 Screenshot_2019-12-13_3_184235.pngHOM.gif 
  38   Tue Dec 17 10:56:08 2019 Ronic ChicheFixedreportlasers and opticsOptical roomfirst data with 3A on the 3rd stage2 pictures :

typical beam with HOM

typical beam after moving the D-shape
 HOM_5-3_saturated.pngfundamental_mode_saturated.png 
  238   Mon Jun 23 14:38:33 2025 Ronic ChicheUnder Processissuemechanics | lasers and optics | detectors and electronicsOptical roomfirst attempt to lockWith Alice, we installed the EOWaves oscillator
to be locked on the FP-cavity (T1 ~ 2500ppm,
T2 ~ 10ppm => F ~ 2500)
 20250623_123816.jpg20250623_123833.jpg20250623_123908.jpg 
  121   Thu Jul 28 13:52:23 2022 Aurélien MartensFixedreportutilitiesOptical roomchiller for CELIA amplifierThe chiller of CELIA amplifier has been
moved from the corridor to the changing room
in front of PLIC. 
  
  122   Mon Aug 8 11:11:28 2022 Aurélien MartensFixedreportutilitiesOptical roomchiller for CELIA amplifiertoday, temperature of the chiller has been
set to 23°C.

measured temperature in the chiller
  
  47   Fri Jan 10 18:51:23 2020 Ronic ChicheFixedreportlasers and opticsOptical roomanalysis of stored and reflected powerthe 10th of January, we increased the power
of the amplifier to study the cavity transmitted
and reflected power signals.
 6x 
  48   Fri Jan 24 16:16:24 2020 Ronic ChicheFixedreportlasers and opticsOptical roomanalysis of stored and reflected powerA chart which summarizes
the data we have or we can estimate.
 Losses.pdfM1_losses_vs_Pcav.png 
  56   Thu Feb 6 11:01:08 2020 Ronic ChicheFixedreportlasers and opticsOptical roomanalysis of stored and reflected powerwith this Finesse around 22-23k, the technique
comparing TRANSMISSION and REFLECTION signals
doesn't work, even in taking into account
 untitled.png 
  58   Wed Jun 19 18:54:00 2019 Huan WangFixedinfolasers and opticsOptical roomamplifierOnefive output power is 24mW now, and 2.41mW(after
EOM) injected into fiber,

a injection power monitor
 1st_stage_amplifier_monitoring_photodiode_signal.jpg 
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