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ID Date Author 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 
  40   Tue Jun 11 18:03:10 2019 Loïc AmoudryFixedreportmechanics | lasers and opticsOtherAmplifier mission BordeauxVoyage Bordeaux au CELIA avec Jérôme
LHERMITE (Loïc et Titoutan)

1er jour (34°) :		  1st_and_2nd_stage.jpg3rd_stage_pumps.jpg3rd_stage_signal.jpg 
  39   Thu May 23 17:30:03 2019 Loïc AmoudryFixedreportlasers and opticsOptical roomTransmission of Sapphire mirrorSee image.  Sapphire_transmission.PNG 
  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 
  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		   
  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		   
  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 
  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 
  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		   
  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)		   
  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		   
  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 
  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		   
  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.		   
  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		   
  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		   
  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.		   
  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		   
  23   Thu Mar 28 09:25:58 2019 Loïc AmoudryFixedissuemechanicsOptical roomMotors Z axis reversedAll Z motors (for P1, S2, S3 and P4) have
been initialized again with a proper HOME
command with their own controller  with		   
  22   Tue Mar 26 18:32:40 2019 Loïc AmoudryFixedreportmechanics | lasers and optics | cablingOptical roomWires in laser pathThere was some ceramic wires close to the
beem path right before P4. We moved them
away (we can imagine they could move again		  before.jpgafter_wire_displaced.jpg 
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