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  Status of commissioning, report also here plots are reports., Page 8 of 13  Not logged in ELOG logo
ID Date Author Status Type Category Location Titledown Text Attachments
  208   Tue Apr 2 08:39:17 2024 Xinyi LuFixedinfolasers and opticsOptical roomHigh power experiments (500kW)Last week, we achieved a stable intracavity
average power of 500kW, limited by amplifier
power. The experimental data are shown
 record.pngpower_vs_time.pngcavitymode_vs_power.png 
  205   Wed Mar 27 22:37:02 2024 Xinyi LuFixedinfolasers and opticsOptical roomHigh power experiments (272kW)Today, Ronic and I achieved 272kW inside
the cavity at 7.5A. The coupling maintained
60%-70%.
 Screenshot_2024-03-27_7_270kW_7.5A.png210_kW_power_at_5A_injection.png272.3kW_at_7.5A.jpg 
  203   Tue Mar 26 19:36:48 2024 Xinyi LuFixedinfolasers and opticsOptical roomHigh power experiments (200kW)These days, Ronic and I achieved 200kW
inside the cavity and 70% coupling efficiency.

- By optimizing the telescope,
 202kW_power_at_8A_injection.pngStrange_drops.jpg 
  204   Wed Mar 27 09:47:37 2024 Xinyi LuFixedinfolasers and opticsOptical roomHigh power experiments (200kW)all the injection power in the chart have
not been measured recently but during the
Loic thesis period.
  
  52   Wed Jan 29 19:00:02 2020 Loïc AmoudryFixedreportlasers and opticsOptical roomGlow discharge cleaner on SBOX mirrorsThe glow discharge cleaner has been tested
on the SBOX mirrors.

I've put them 1 by 1. Each
 glow.PNG 
  91   Tue May 24 22:11:40 2022 Manar AmerFixedreportlasers and opticsOptical roomFundamental Mode TEM00The current setup for the SBox has a beam
viewer and 2 photodiodes placed at reflection
and transmission.
 20220524_SBox_Setup.png00mode_CW_piezo_drive.bmp00mode_11mode.bmp 
  92   Wed May 25 17:34:29 2022 Manar AmerFixedreportlasers and opticsOptical roomFundamental Mode TEM00Adding images from the transmission after
the spherical mirrors M3 and M4 window for
a resonating mode inside the cavity.
 beamviwer_transmission_at_M3.bmpbeamviwer_transmission_at_M4.bmp 
  94   Wed Jun 8 10:58:15 2022 Manar AmerFixedreportlasers and opticsOptical roomFundamental Mode TEM00Images of the Transmitted beam at M2 mirror
at different days. 

The first one was from last week,
 20220530_00_Mode.bmp00_Mode_Beam_Transmitted_Position_drift_due_to_temperature.bmp 
  102   Wed Jul 6 18:35:38 2022 Manar AmerFixedreportlasers and opticsOptical roomFundamental Mode TEM00Closing series of 00 mode for FSR @ 133.33
MHz

 
  
  22   Mon Nov 5 13:11:08 2018 Loïc AmoudryFixedreportlasers and opticsOptical roomFirst run with spare mirrors


I (A)
 Plot_power_and_gain_vs_all.JPGpowerup.xlsx 
  12   Wed Oct 31 11:36:30 2018 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse vs power by difference between main and second resonanceMeasurements show that ratio decrease versus
power. BUT, the second resonance measurement
induce lower power in the cavity so the ratio
 CrossSecondaryResonance.mGetCavity.m 
  15   Wed Oct 31 13:43:28 2018 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse vs power by difference between main and second resonanceMeasurement on 24/10/18




  
  16   Wed Oct 31 13:44:22 2018 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse vs power by difference between main and second resonanceMeasurement on 25/10/2018




  
  217   Mon Apr 15 18:19:40 2024 Xinyi LuFixedinfolasers and opticsOptical roomFinesse measurement of 2-mirror cavity- Today Daniele and I cleaned the spherical
mirror by wiping it with alcohol,
and the finesse increased to 47k
 finesse_45k.png 
  214   Wed Apr 10 11:35:54 2024 Xinyi LuFixedinfolasers and opticsOptical roomFinesse measurement (35k)These days, Ronic, Aurélien
and I use OEwaves CW laser to measure the
finesse of SBOX. We made 5 measurements
 5_measurements_of_finesse.pngfit.png 
  242   Thu Sep 4 17:52:03 2025 Alice RenauxUnder Processreportlasers and opticsOptical roomFinesse measurementToday, with Ronic, we measured the finesse
of the 2-mirror cavity witht the NKT CW laser.

We were able to perfrom the measurement
 Figure_3.png 
  243   Thu Sep 4 17:56:50 2025 Alice RenauxUnder Processreportlasers and opticsOptical roomFinesse measurement(Finesse 2651 is consistent with that obtained
from the mirrors' transmission coefficients,
which is about 3100.)
  
  218   Tue Apr 16 18:38:04 2024 Xinyi LuFixedinfolasers and opticsOptical roomFiber injection, spectrum and connection of 2nd stage amplifierToday, Daniele and I injected the laser
into the fiber, installed the telescope,
connected the second stage of the amplifier,
 CVBG_inject_to_fiber.pngtelescope.png 
  111   Tue Jul 12 10:07:05 2022 Manar AmerFixedreportlasers and optics | detectors and electronicsOptical roomFSR change & Finesse Measurements The FSR of the 2 mirror (plan-spherical)
Cavity was adjusted from 210 MHz to reach
216.643 MHz
 00mode.jpg00mode_diameter.jpg00mode_diameter_fit.jpg 
  112   Tue Jul 12 10:19:30 2022 Manar AmerFixedreportlasers and optics | detectors and electronicsOptical roomFSR change & Finesse Measurements Yesterday evening the cavity was Vacuum
pumped up to pressure of 5.5*10^-2 and locked 

changed FSR to be 216.662 MHz and
 Screenshot_2022-07-11_1_204143.pngScreenshot_2022-07-11_0_203646.png 
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