40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  OMC elog, Page 7 of 10  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  62   Thu Feb 7 23:01:45 2013 KojiOpticsCharacterizationUV epoxy gluing test [Jeff, Yuta, Koji]
Gluing test with UV-cure epoxy
Optocast 3553-LV-UTF-HM
  
  63   Thu Feb 21 18:44:18 2013 KojiOpticsConfigurationPerpendicularity testPerpendicularity test of the mounting
prisms:
The perpendicularity of the prism
 perpendicularity_test.pdfP2203206.JPG 
  64   Wed Feb 27 18:18:48 2013 KojiOpticsConfigurationMore perpendicularity testMounting Prisms:
(criteria: 30arcsec = 145urad =>
0.36mm spot shift)
  
  65   Fri Mar 1 23:06:15 2013 KojiOpticsConfigurationMore perpendicularity test finalPerpendicularity of the "E" mirror
was measured.

Mounting Prisms:
  
  66   Fri Mar 1 23:52:18 2013 KojiOpticsCharacterizationWedge measurement with the autocollimator and the rotation stageMeasurement:

    E1:   α = 
0.672 deg, β = +0.0  arcmin (0 div up)
  
  67   Tue Mar 5 19:37:00 2013 ZachOpticsCharacterizationeLIGO OMC visibility vs. power measurement detailsEDIT (ZK): Koji points out that (1 -
Ti) should really be the non-resonant reflectivity
of the aligned cavity, which is much closer
 eOMC_visibility_3_4_13.png 
  68   Wed Mar 6 23:24:58 2013 ZachOpticsCharacterizationeLIGO OMC visibility vs. power measurement detailsI found that, in fact, I had lowered
the modulation depth since when I measured
it to be 0.45 rads --> Psb = 0.1.
 TEK00005.PNGTEK00007.PNGeOMC_visibility_3_4_13.pngeOMC_AMTF_vs_power_3_6_13.png 
  74   Wed Mar 20 09:38:02 2013 ZachOpticsCharacterization[LLO] OMC test bench modified For various reasons, I had to switch
NPROs (from the LightWave 126 to the Innolight
Prometheus).
 new_setup_traced.jpg 
  76   Sat Mar 23 02:41:00 2013 KojiOpticsGeneralBlack glass beam dumps for the first OMCReceived black glass beam dumps from
MIT
- gluing by EP30-2 looks pretty fine.
 P3223314.JPGP3223319.jpgP3223320.jpg 
  77   Sat Mar 23 13:34:14 2013 KojiOpticsGeneralPZT assembly prototype glued 
Prototype
PZT assembly
 P3223322.jpgP3223323.jpgP3233336.jpgP3233348.jpg 
  81   Mon Mar 25 19:31:16 2013 KojiOpticsGeneralOMC Top-side gluing[Koji Jeff Zach]  
AAA
 P3253353.jpgP3253372.jpgP3253394.jpgP3253400.jpg 
  86   Thu Mar 28 03:37:07 2013 ZachOpticsConfigurationTest setup input optics progress[Lisa, Zach]
Last night (Tuesday), I finished
setting up and aligning most of the input
 OMC_test_setup_IO.jpg2013-03-27_05.48.20.jpg2013-03-28_02.29.36.jpg 
  87   Fri Mar 29 08:55:00 2013 ZachOpticsConfigurationBeam launched into fiber

    

       
            
  
  88   Mon Apr 1 03:13:41 2013 KojiOpticsGeneralFailure of PZT-glass joints[Koji, Jeff, Zach, Lisa]
We glued a test PZT-mirror assembly
last week in order to make sure the heat
  
  89   Mon Apr 1 03:23:48 2013 KojiOpticsGeneralUV power calibration[Koji Lisa Jeff Zach]
Eric G bought a UV power meter from
American Ultraviolet.
  
  91   Mon Apr 1 18:17:01 2013 KojiOpticsGeneralMirror curvature center testLocations of the curvature minimum
on the OMC curved mirrors have been measured.
 6x 
  93   Wed Apr 3 18:42:45 2013 KojiOpticsGeneralEP30-2 gluing testEP30-2 gluing test
  
  94   Thu Apr 4 00:35:42 2013 ZachOpticsConfigurationMMT installed on breadboard, periscope built[Koji, Zach]
 2013-04-03_23.43.00.jpg 
  95   Thu Apr 4 01:35:04 2013 KojiOpticsCharacterizationMode matching to the OMC cavityThe fiber output was matched with the lenses
on a small bread board.
The detailed configuration is found
  
  96   Thu Apr 4 01:43:06 2013 KojiOpticsCharacterizationMirror T measurement[Zach, Koji]
The measurement setup for the transmission
measurement has been made at the output of
  
  97   Thu Apr 4 23:44:52 2013 KojiOpticsConfigurationBeam launched into fiberWe had to move our flipper mirror to share
the beam between Peter's setup and ours as
our flipper is at the place where the ISS
  
  99   Fri Apr 5 18:18:36 2013 ZachOpticsConfigurationAOM probably broken

    

       
            
 Isomet_1250C_zin_4_5_13.png 
  100   Mon Apr 8 11:11:37 2013 KojiOpticsCharacterizationMore Mirror T measurementMore Ts of the mirrors were measured.
A mirror specification:
Request: 8300+/-800 ppm
  
  101   Mon Apr 8 11:29:08 2013 KojiOpticsCharacterizationMirror/PZT Characterization links
    Mirror
List
    http://nodus.ligo.caltech.edu:8080/OMC_Lab/152
  
  103   Mon Apr 8 20:56:52 2013 KojiOpticsConfigurationPZT & Curverd Mirror arrangementAssembly #1:
Mounting Prism #16
PZT #26
 PZT_assembly.pdf 
  104   Mon Apr 8 21:11:14 2013 KojiOpticsGeneralPZT assembly gluing[Jeff, Zach, Koji] 
PZT assembly gluing
Glue gun -> to be returned to
  
  105   Mon Apr 8 23:42:33 2013 KojiOpticsConfigurationFake OMC roughly alignedMode matching:
 
 beam_profile.pdfmode_matching.pdf 
  106   Tue Apr 9 13:56:09 2013 KojiOpticsGeneralPZT assembly post gluing / pre baking pictures 
  
  107   Wed Apr 10 00:40:30 2013 ZachOpticsConfigurationfauxMC locked[Koji, Zach]
 fauxMC_labeled.jpg 
  109   Fri Apr 12 09:25:31 2013 KojiOpticsCharacterizationAlignment of the OMC (without glue)[Zach Koji]
The first attempt not to touch the
curved mirrors did not work. (Not surprising)
  
  110   Sat Apr 13 21:06:02 2013 KojiOpticsGeneralOMC Bottom-side: cavity glued[Jeff, Zach, Lisa, Koji]
Gluing of the cavity mirrors went
 Cav_scan_response_130412_Pitch.pdfCav_scan_response_130412_Yaw.pdf 
  111   Tue Apr 16 00:40:45 2013 KojiOpticsGeneralPD/QPD path gluing ~ preparation[Jeff Koji]
- Placed the optics on the PD/QPD
path
  
  112   Tue Apr 16 08:12:14 2013 KojiOpticsCharacterizationFurther More Mirror T measurementT&Rs of the B mirrors and some of the
E mirrors are measured.
I found that 
  
  113   Tue Apr 16 09:43:58 2013 KojiOpticsConfigurationMirror list for L1OMCL1 OMC
Cavity Mirrors
FM1 (input coupler): A8
 OMC_breadboard_mirror_config.png 
  114   Tue Apr 16 23:26:51 2013 KojiOpticsCharacterizationFurther More Mirror T measurementSince the previous measurement showed too
high loss, the optical setup was checked.
It seemed that a PBS right before
  
  115   Wed Apr 17 07:30:04 2013 KojiOpticsGeneralQPD path gluedYesterday,
all of the glass components for the QPD path
were glued.
  
  120   Mon May 6 19:31:51 2013 KojiOpticsCharacterizationSpot position measurement on the diode mountsMeasurement Order: DCPD2->DCPD1->QPD1->QPD2
DCPD1: 1.50mm+0.085mm => Beam
0.027mm too low
 DCPD1.pngDCPD2.pngQPD1.pngQPD2.png 
  121   Wed May 8 15:08:57 2013 KojiOpticsCharacterizationSpot position measurement on the diode mountsRemeasured the spot positions:
DCPD1: 1.50mm+0.085mm => Beam
0.084mm too high
 DCPD1.pngDCPD2.pngQPD1.pngQPD2.png 
  132   Thu May 30 15:00:28 2013 KojiOpticsGeneralQPD alignmentThe QPD alignment was adjusted using
the aligned beam to the cavity and the 4ch
transimpedance amplifier.
  
  133   Fri May 31 05:46:54 2013 KojiOpticsGeneralQPD alignmentPeter F suggested to check the bottom surface
of the PD housings if there is any protrusion/interference/whatever.
And that was true! It was found that
 QPD1.JPGQPD2.JPGQPD_calib.nb.zip 
  134   Fri May 31 14:07:54 2013 KojiOpticsCharacterizationTransverse Mode Spacing measurement afte the baking Measurement for pitch
Free Spectral Range
(FSR): 264.9703 +/− 0.0007 MHz
 Cav_scan_response_130530_Pitch.pdfCav_scan_response_130530_Yaw.pdf 
  135   Mon Jun 3 18:58:08 2013 KojiOpticsConfigurationOMC final tests- QPD mount aligned, QPD output checked
  The spots are with 100um from
the center of the diodes. [ELOG
  
  145   Tue Jun 18 10:01:11 2013 KojiOpticsCharacterizationCavity Finesse analysisThis is the analysis of the cavity finesse
data taken on  Apr/13/2013 (before baking),
May/30/2013 (after baking), and Jun/02/2013
 finesse_measurements.pdf 
  151   Fri Aug 16 15:31:17 2013 KojiOpticsConfigurationMirror list for OMC(002)OMC(002)

Cavity Mirrors

FM1 (input coupler): A9
  
  152   Fri Aug 16 16:36:19 2013 KojiOpticsGeneralOptics ListLink
to the "Mirror/PZT Characterization
links"
  
  154   Wed Aug 21 08:31:21 2013 KojiOpticsCharacterizationH1 OMC cavity alignmentAlignment of the H1 OMC cavity mirrors
- The cavity mirrors as well as the
first steering mirror were aligned on the
  
  155   Thu Aug 22 15:34:03 2013 KojiOpticsGeneralOMC Cavity side gluing[Koji Jeff]
o BS1, FM1, FM2 prisms were glued
=> This fixed the unstability of
  
  159   Thu Aug 29 02:52:50 2013 KojiOpticsCharacterizationH1OMC Curved Mirror AlignmentCavity
parameter was measured with 50V bias on PZT1
(CM1)
 Cav_scan_response_130828_Pitch.pdfCav_scan_response_130828_Yaw.pdf 
  161   Fri Aug 30 12:14:50 2013 KojiOpticsGeneralH1 OMC Cavity length adjustmentShort
conclusion: 
The roundtrip cavity length for
 Gouy_FSR_130827.nb.zipP8284343.jpg 
  162   Fri Aug 30 12:22:56 2013 KojiOpticsGeneralH1 OMC Cavity side UV gluingH1 OMC Cavity side optics was glued
on the breadboard
  
ELOG V3.1.3-