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ID Date Author Status Type Category Locationdown Title Text Attachments
  24   Fri Mar 29 18:33:15 2019 Ronic ChicheFixedissuemechanics | lasers and opticsOptical roomAlignment procedurewe did again the complete alignment procedure
starting with iris and optimizing injection
motors Ma and Mb, then installing mirror		   
  25   Tue Apr 2 17:59:18 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse after removing wires19/04/01: We removed the wires from the
beam path in the cavity. Finesse stayed at
3400. FSR: 33.342 MHz.		   
  26   Tue Apr 2 18:03:31 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomTransmission of the mirrorsWe openned the cavity, removed S2 and measured
trans of P1 and same for S2.

Pin ~= 3.91 mW		   
  27   Tue Apr 2 18:05:46 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomBeam size at closest spherical mirrors positionS3 and S2 @ +1 640 000 and P1 and P4 @
-825 000

Diameter in x: 4.7mm		   
  28   Thu Apr 4 09:42:12 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomTransmission of the mirrorsAfter verification, transmission of P1
correspond to ~150ppm.

The 1337ppm come from a beam leakage.		   
  29   Fri Apr 5 11:18:47 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomTransmission of the mirrorsP1 transmission out of the mount (means
angle of the mirror is not the real angle):

Pin = 3.2 mW		   
  30   Fri Apr 5 11:28:39 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse with P1 SUPRASILP1 SUPRASIL has been installed instead
of P1 Sapphire. It has been cleaned 3 times
on each face with wipe+isopropanol before		  190404_mode_size_with_P1_SUPRASIL.PNG190404_mode_fit_with_P1_SUPRASIL.PNGtek00000.pngtek00002.png 
  31   Mon Apr 8 10:18:31 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse after 2daysFinesse measured this morning after P1
SUPRASIL being into the cavity for two
days. In order to check if it's getting		   
  32   Mon Apr 8 11:55:40 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomP4 cleaned and finesse measurementP4 cleaned with isopropanol.

Finesse measured afterward: ~=13
000 (clear increase)		   
  33   Wed Apr 10 13:11:46 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomMirror's cleaning and finesseSummary of what have been cleaned
the last week:

P1 with isopropanol, finesse 11000		   
  34   Thu Apr 18 16:07:23 2019 Loïc AmoudryFixedinfolasers and opticsOptical roomInjection of 33MHz Onefive through fiberOutput power of the Onefive, and power
after injection and different components
have been measured.		  power_ouput_Onefive.PNGpower_after_injection_and_point9dB_blue_fiber.PNGpower_after_halfwaveplate_and_injection_and_point9dB_blue_fiber.PNGpower_after_halfwaveplate_and_injection_and_point9dB_blue_fiber_and_EOM_NIR-MPX-LN-0dot1.PNGpower_after_halfwaveplate_and_injection_and_point9dB_blue_fiber_and_EOM_NIR-MPX-LN-02.PNG 
  35   Thu Apr 18 16:17:53 2019 Loïc AmoudryFixedissuelasers and opticsOptical room33MHz Onefive power overtime decreasePower of the 33MHz Onfive decreases over
time. Have to pay attention to that.
Note that air dryers have never been		  180410_power_33mhz_1jours.PNG180925_Power.JPG190416_power_ouput_Onefive.PNG 
  36   Tue May 21 17:44:46 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomNew Suprasil mirror from LMA14/05/19:

New Suprasil mirror received. It
will replace the S-BOX suprasil mirror on		   
  37   Tue May 21 17:49:30 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomFinesse after cleaning (new suprasil mirror)15/05/19-20/05/19:

Cleaning of the mirrors:

Initial finesse 14000 @air		   
  38   Thu May 23 10:10:56 2019 Ronic ChicheFixedreportlasers and opticsOptical roomFinesse measurement by decay time technique5 Files attached:

- Note on the technique and results
for the present cavity on 2019, May 21th		  2019-05-21_-_Finesse_measurement_by_decay_time_technique.docxtek0005CH1.isftek0006CH1.isfplotdata.mmyerror.m 
  39   Thu May 23 17:30:03 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomTransmission of Sapphire mirrorSee image.  Sapphire_transmission.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 
  43   Tue Jun 18 20:44:34 2019 Huan WangFixedinfolasers and opticsOptical roomtelescope for Koherastelescope of Koheras is removed, information
record here:

- distance between collimator edge		  2019.06.18_telescope_of_Koheras.jpg 
  46   Thu Jul 4 10:17:46 2019 Ronic ChicheFixedinfodetectors and electronicsOptical roomNew design for PDH boxesA new design has been studied for the 5
PDH boxes to better match the low (33MHz)
repetition rate of the ThomX laser.		  2019-06-14_-_PDH_Maurice_modifié.pdf 
  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		   
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