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ID Date Author Type Categoryup Subject Text Attachments
  370   Mon Jul 1 12:49:42 2019 KojiOpticsCharacterizationScattering measurement of A and C mirrorsLiyuan's scattering measurement for
the A and C mirrors.
 omc_cm_tis_062419.pdfomc_prism_tis_062419.pdf 
  371   Thu Aug 22 12:35:53 2019 StephenOpticsCharacterizationWedging of the debonded PZTs 2019 AugustWedge and thickness measurements of PZTs
12 and 13 took place after debonding and
cleaning - results are shown in the first
 IMG_4775.JPGIMG_4770.JPG 
  372   Fri Aug 23 11:11:44 2019 shrutiOpticsCharacterizationFinding the curvature bottomI attempted to fit the data taken
by Koji of the beam spot precession at the
CCD in order to find the location of the
 CircleFit.pdfSineFit.pdf 
  373   Thu Aug 29 11:51:49 2019 shrutiOpticsCharacterizationWedging of the debonded PZTs - CalculationUsing the measurements of PZTs 12,13 taken
by Stephen, I estimated the wedging angle
and orientation following Section 2.3.1 of
 PZT_Wedging_Results.pdfPZT_Wedging_Calc.pdf 
  395   Thu Oct 8 19:55:22 2020 KojiGeneralCharacterizationPower Measurement of Mephisto 800NE 1166AThe output of Mephisto 800NE (former TNI
laser) was measured.
The output power was measured with
 Mephisto800NE_1166A.pdf 
  402   Sat Nov 21 13:58:30 2020 KojiElectronicsCharacterizationDark Current Measurement for InGaAs QPDsDark current measurement for InGaAs QPDs
(OSI FCI-InGaAs-Q3000) has been done using
Keithley 2450 and Frank's diode test
 Q3000_dark_current.pdf 
  403   Sun Nov 22 13:49:12 2020 KojiElectronicsCharacterizationImpedance Measurement for InGaAs QPDsTo know any anomaly to the junction
capacitance of the QPD segments, the RF impedances
were tested with a hand-made impedance measurement.
 impedance_measurement.pdfP_20201121_183830.jpgimpedance_test.pdfQ3000_impedance_test.pdf 
  404   Mon Nov 23 23:17:19 2020 KojiElectronicsCharacterizationThe dark noise of the Q3000 QPDsThe dark noise levels of the four Q3000
QPDs were measured with FEMTO DLPCA200 low
noise transimpedance amp.
 Q3000_dark_noise_81.pdfQ3000_dark_noise_82.pdfQ3000_dark_noise_83.pdfQ3000_dark_noise_84.pdf 
  405   Tue Nov 24 10:45:07 2020 gautamElectronicsCharacterizationThe dark noise of the Q3000 QPDsI see that these measurements are done
out to 100 kHz - I guess there is no reason
to suspect anything at 55 MHz which is where
  
  406   Tue Nov 24 12:27:18 2020 KojiElectronicsCharacterizationThe dark noise of the Q3000 QPDsThe amplifier BW was 400kHz at the gain
of 1e7 V/A. And the max BW is 500kHz even
at a lower gain. I have to setup something
  
  454   Mon Nov 14 08:34:45 2022 CamilleOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)[Camille, Koji]

Friday, Nov 11th, 2022

Setting up OMC #1 for transmission
 PXL_20221111_200942943.jpgPXL_20221111_200957951.jpg 
  455   Mon Nov 14 09:27:13 2022 KojiOpticsCharacterizationtransmission measurements through OMC #1 (before cleaning)The measured total optical loss of the
OMC was

1st:   0.015 +/- 0.003
 OMC_Powerbudget.xlsx 
  460   Thu Nov 17 19:50:00 2022 KojiOpticsCharacterizationConclusion on the cleaning of OMC #001Conclusion on the cleaning of OMC
#001

- After a couple of first contact
 OMC_loss.pdf 
  464   Fri Dec 2 11:42:03 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminants[Camille, Koji] Log of the work
on Nov 30, 2022

 


The
following is the notes from GariLynn




 PXL_20221130_234101575.jpgPXL_20221130_234013958.jpgPXL_20221201_021727724.jpgScreen_Shot_2022-12-02_at_12.43.02.png 
  465   Fri Dec 2 12:38:15 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminantsAnother set of FC cleaning was applied
to FM1/FM2/CM1/CM2 and SM2. Some FC strings
are visible on SM2. So I decided to clean
 PXL_20221202_034932211.jpgOMC_loss.pdf 
  466   Fri Dec 2 23:58:33 2022 KojiOpticsCharacterizationOMC #1 cleaning for water soluble contaminantsThe second trial of the water scrub

A bright scatter is visible on
FM1, so I tried water scrub on FM1. This
 PXL_20221203_063327268.jpgOMC_loss.pdf 
  468   Fri Dec 9 13:13:13 2022 KojiOpticsCharacterizationFSR/TMS/Spot Positions/Transmission[Camille Koji]

We quickly measured the basic parameters
of the OMC as is.
 HOM_plot_PZT.pdfOMC4_spot.pngPXL_20221208_233706115.jpg 
  469   Mon Dec 12 19:04:40 2022 KojiOpticsCharacterizationFSR/TMS/Spot Positions/Transmission 2nd trial[Camille Koji]

We replaced CM2 with a PZT mirror
subassembly serialized by PZT "13"
 PXL_20221212_235351320.jpgOMC4_spot.pngHOM_plot_PZT.pdfPXL_20221213_000406843.jpgScreen_Shot_2022-12-12_at_19.36.10.png 
  470   Mon Dec 19 18:51:50 2022 KojiOpticsCharacterizationTMS measurement with the PZT voltages altered[Camille, Koji] Log of
the work on Dec 15, 2023

The vertical and horizontal
 Cav_scan_response_PZT1_0_Pitch.pdfCav_scan_response_PZT1_0_Yaw.pdfOMC_20221215.pdfHOM_plot_PZT0_0.pdfHOM_PZTV_PZT1_0V.pdf 
  489   Wed Feb 8 16:10:52 2023 StephenOpticsCharacterizationA+ OMC, Parallelism of HR Prisms[Camille, Thejas, Stephen]

We set up the white light autocollimator
in the Downs B119 cleanroom. (Nippon Kogaku,
 7x 
  490   Thu Feb 9 15:54:41 2023 Thejas OpticsCharacterizationA+ OMC, Parallelism of HR Prisms [Camille, Thejas, Stephen]

Continuing yesterday's efforts
to measure the wedge angle of the back surface
 19x 
  491   Tue Feb 14 10:45:00 2023 Thejas OpticsCharacterizationA+ OMC Prism perpendicularity[Camille, Stephen, Thejas]

Following the wedge angle measurements
of the prisms, perpendicularoty of their
 27x 
  492   Tue Feb 14 22:52:35 2023 Thejas OpticsCharacterizationA+ OMC Prism perpendicularity of HR Prisms and BS[Camille, Stephen, Thejas]

Continuing with the efforts to
measure the perpndicularity.
 18x 
  494   Wed Feb 15 17:40:21 2023 Thejas OpticsCharacterizationA+ OMC perpendicularity of hole prisms[Camille, Stephen, Thejas]

Contnuing the efforts to measure
and check perpendicularity: tombstone prisms
 20x 
  495   Fri Feb 17 17:11:28 2023 Thejas OpticsCharacterizationA+ OMC beam-splitter prisms wedge angle measurement [Camille, Stephen, Thejas]

 

Yesterday we measured wedge angle
 11x 
  496   Fri Feb 17 17:25:39 2023 Thejas OpticsCharacterizationA+ OMC Breadboard measuerementsYesterday we also measured weight and dimensions
of breadboard. Error for the following measurements
is same as the least count of the instruments
 IMG_3753BB8D72D5-1.jpegIMG_62A5AD50E8D1-1.jpegOMC_5_(dragged).pdf 
  497   Fri Feb 17 17:41:57 2023 Thejas ElectronicsCharacterizationA+ OMC Piezos wedge angle [Camille, Stephen, Thejas]

PZT model: Noliac 2124

Qty: 18 (Sr. No. 30 - 48)
 OMC_6_(dragged).pdf 
  498   Mon Feb 27 17:40:27 2023 Thejas OpticsCharacterizationA+ OMC curved mirror characterization[Camille, Stephen, Thejas]

Today, before the ZYGO lab was
cleaned and prepared for the cureved mirrors'
  
  499   Wed Mar 1 10:23:10 2023 Thejas OpticsCharacterizationA+ OMC curved mirror characterization[Camille, Thejas, Stephen]

Yesterday, efforts were made to
measure ROC of curved mirrors (#6) in the
  
  502   Tue Mar 7 10:20:55 2023 Thejas OpticsCharacterizationA+ OMC Curved mirror radius of curvature[Camille, Stephen, Thejas]

Stephen returned the curved mirror
#6 to Liyuan for point transmission measurement.
 image.jpegimage.jpegimage.jpegimage.png 
  503   Tue Mar 7 23:00:16 2023 Thejas OpticsCharacterizationOMC Lab clean upToday, Koji and I cleaned up the the lab
space and made some space on the
optical table for radius of curvature measurement
 IMG_0173-2.jpgIMG_0175-2.jpg 
  504   Wed Mar 8 17:27:51 2023 Thejas OpticsCharacterizationA+ OMC Curvature minimum of curved optics [Stephen, Thejas]

Today, a more rigorous effort was
made to re-measure the position of the optics
 image.jpeg 
  505   Fri Mar 10 10:23:08 2023 ThejasOpticsCharacterizationA+ OMC curved mirror radius of curvature OMC test set-up

Yesterday, laser beam output from
the fibre follwoing teh mode-matching lenses
 IMG_1E4662B2100B-1.jpegScreenshot_2023-03-10_at_10.49.45.pngScreenshot_2023-03-10_at_10.51.42.pngOMC_8_(dragged).pdf 
  506   Fri Mar 10 11:12:57 2023 Thejas OpticsCharacterizationA+ OMC Curvature minimum of curved optics [GariLynn, Stephen, Thejas]

Yesterday, we placed an iris (borrowed
from OMC Lab) infront of the spherical transmission
  
  507   Tue Mar 14 10:41:06 2023 Thejas OpticsCharacterizationA+ OMC curved mirror characterization[Camille, GarriLynn, Stephen, Thejas]

Folllowing the replacement of the
spherical transmission / reference mirror
 image.jpeg 
  508   Tue Mar 14 12:12:41 2023 Koji OpticsCharacterizationA+ OMC curved mirror characterizationRoC: 2.65m ! Interesting. I'll wait
for the follow-up analysis/measurements.
The RoC may be dependent on the area (diameter)
  
  509   Tue Mar 14 18:24:03 2023 Thejas OpticsCharacterizationA+ OMC Curved mirror radius of curvatureToday, I tried to measure the radius of
curvature of the curved mirror using the
input beam for the OMC test set-up. It was
 Screenshot_2023-03-14_at_18.29.56.pngScreenshot_2023-03-14_at_18.32.32.pngScreenshot_2023-03-14_at_18.33.28.png 
  510   Tue Mar 14 20:06:03 2023 Koji OpticsCharacterizationA+ OMC Curved mirror radius of curvatureIf the mirror has the RoC, it works as
a lens. And you should be able to see the
effect in the beam profile.
  
  511   Wed Mar 15 15:28:24 2023 Thejas OpticsCharacterizationA+ OMC Curved mirror radius of curvatureThanks for teh comment Koji. Yes, I did
see this effect by comparing the beam sizes
with and without the curved mirror. But the
  
  512   Wed Mar 15 17:07:35 2023 Koji OpticsCharacterizationA+ OMC Curved mirror radius of curvatureI hope you can find useful lenses from
the lens kit in the cabinet. If you need
more lenses and mounts, talk to our students
  
  513   Fri Mar 17 15:01:21 2023 Koji OpticsCharacterizationA+ OMC Curved mirror radius of curvatureThanks Koji, the lenses available in the
cabinet in the lab actually sufficed. 

  
  514   Fri Mar 24 07:38:54 2023 Camille MakaremOpticsCharacterizationROC measurements of the curved mirrors[Thejas, Camille]
21 March 2023

We made slight adjustments to the
  
  515   Fri Mar 24 07:47:37 2023 Camille MakaremOpticsCharacterizationROC measurements of the curved mirrors[Camille]
22 March 2023
Beam profile measurements were continued
 CurvedMirror_FL_measurments.PNGsn07.PNG 
  516   Tue Mar 28 11:21:27 2023 Camille MakaremOpticsCharacterizationSagitta measurements of curved mirrors[Camille, Stephen, Thejas]

Curved mirror sn02 was used to test
 CurvedMirrorSN02_SurfaceProfiles.PNG 
  517   Mon Apr 3 11:06:47 2023 Thejas OpticsCharacterizationFlat mirror flatnessData can be found in DCC document T2300050. 

 

On Friday. Camille and I measured
  
  520   Tue Apr 11 16:18:25 2023 ThejasOpticsCharacterizationA+ OMC Curved mirror radius of curvatureCurved mirror radius of curvature raw data
can be found in the DCC document: T2300050

The input beam falling on the curved
 Screenshot_2023-04-11_at_16.23.18.pngScreenshot_2023-04-11_at_16.35.16_(2).pngini_beam.pdf 
  521   Thu Apr 13 07:47:28 2023 Camille MakaremOpticsCharacterizationZygo setup for curved mirror measurements[Camille, Thejas, Stephen]

We modified the Zygo setup for
measuring the sagitta of the curved mirrors.
 dist_angle_spread.PNG 
  522   Fri Apr 14 15:52:53 2023 Camille MakaremOpticsCharacterizationDetermining the curvature bottom of the curved mirrors[Camille, Thejas]

We repeated Zygo measurements (using
the same setup and method as below) for curved
 dist_angle_spread_v2.PNG 
  523   Fri Apr 14 16:36:29 2023 ThejasOpticsCharacterizationDetermining the curvature bottom of the curved mirrorsAttached here with are relevant plots.




 21x 
  524   Mon Apr 17 17:56:25 2023 Thejas OpticsCharacterizationA+ OMC Piezos wedge angle PZT dimension analyzed and characterized.
The blue dot in the images represents the
position of the cathode. The length of the
 19x 
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