| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
631
|
Wed Jul 20 15:54:21 2011 |
tara | DailyProgress | optic | optic layout for new fss setup | I edited the layout so that the
spots in both AOMs are 200 um. I'll list
what optics we might have to buy. |
|
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632
|
Wed Jul 20 23:00:30 2011 |
Frank | DailyProgress | optic | optic layout for new fss setup | the lens and mirror are in the ATF, a second
VCO is in the left cabinet.
|
|
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636
|
Fri Jul 22 20:51:13 2011 |
frank, tara | DailyProgress | optic | cleaning opto mechanical parts | As we removed some optics on the table,
we use pressurized air to blow away dust/dirt
on the mechanical parts (mount/ post/ lens |
|
|
640
|
Tue Jul 26 18:42:16 2011 |
raphael, tara | DailyProgress | optic | cleaning opto mechanical parts | Today we removed the optics behind the
PMC, ACAV, and cleaned the table.
Optic mounts and |
|
|
644
|
Thu Jul 28 01:54:21 2011 |
frank, tara | DailyProgress | optic | cleaning opto mechanical parts | Today we started working on the
layout. There is one mistake in the layout,
the mirror behind AOM for REFCAV is too close |
|
|
647
|
Fri Jul 29 00:42:19 2011 |
frank, tara | DailyProgress | optic | cleaning opto mechanical parts | We preparing optics for the new layout.
To reduce scattering noise, most of the Y1-1064
mirrors we have been using will be replaced |
|
|
648
|
Tue Aug 2 23:58:40 2011 |
tara | DailyProgress | optic | New RCAV setup is locked | RCAV is locked, I have not
optimized the mode matching yet, the coupling
efficiency is ~ 67%. |
|
|
653
|
Tue Aug 9 00:39:30 2011 |
tara | DailyProgress | optic | RCAV modematching optimized | I optimized mode matching for RCAV.
The coupling is ~75%. I also minimized
RFAM from the 35.5MHz EOM. |
|
|
658
|
Mon Aug 15 23:13:53 2011 |
tara | DailyProgress | optic | RCAV modematching optimized | I recalculated the mode matching
so that the spot radius in AOMs is 100 um.
Now the visibility of RCAV is 90%. |
|
|
659
|
Wed Aug 17 20:41:13 2011 |
tara | DailyProgress | optic | ACAV path is up | I put most optics on ACAV path. I have
not tried to lock the cavity yet. I'll install
ACAV RFPD next. |
|
|
676
|
Tue Sep 13 01:11:51 2011 |
Frank | Notes | optic | 50:50 beamsplitter data - scanned spec sheets from ATF | found the box with the beam splitters Dmass
bought almost 2 years ago but never unpacked
or used. They are super-polished 50:50 beam |
|
|
719
|
Tue Nov 1 16:11:48 2011 |
tara | Notes | optic | V-block for faraday isolator | I made a drawing for faraday isolator's
base. I'll submit the drawing tomorrow. |
|
|
726
|
Tue Nov 8 18:51:38 2011 |
tara | DailyProgress | optic | optics for RFAM | I added mirrors to pick up stray beams
just before the cavities. These beams will
be used for monitoring RFAM. |
|
|
739
|
Tue Nov 29 01:50:40 2011 |
tara | DailyProgress | optic | optics for RFAM | I made some minor adjustment to the optics
layout so that the reflected beam at the
PBS before the cavity can be used to measure |
|
|
746
|
Sat Dec 3 01:12:00 2011 |
tara | Notes | optic | V-block for faraday isolator | I replaced the
isolator mount with the V block I drew. The
height is a bit to high. I'll send it back |
|
|
770
|
Tue Dec 27 19:49:27 2011 |
Frank | Notes | optic | Lens Kit missing! | The entire lens kit (Newport wooden box,
v-coating for 1064nm) is missing . Checked other labs but can't find |
|
|
784
|
Fri Jan 13 16:51:29 2012 |
Tara | Notes | optic | Isolator base, EOM base's height | Note: new EOM base
This one will have total height of
1.31" . THe height of the EOM (base |
|
|
785
|
Tue Jan 17 21:59:47 2012 |
tara | DailyProgress | optic | 14.75MHz EOM | As we decided to use lower sideband frequency
(14.75MHz, instead of 35.5MHz), I replaced
the Broadband EOM with 14.75MHz EOM. |
|
|
787
|
Thu Jan 19 01:19:31 2012 |
tara | DailyProgress | optic | 14.75MHz EOM | The 14.75 MHz EOM we have is for visible
light, so we went to TNI and borrowed a 14.75
MHz EOM for IR and an 14.75 Mhz resonant |
|
|
789
|
Thu Jan 19 23:43:43 2012 |
tara | DailyProgress | optic | RCAV is locked | RCAV is locked using TTFSS.
It took awhile before I could lock
the cavity because the 14.75 MHz EOM tilts |
|
|
790
|
Fri Jan 20 15:31:08 2012 |
Frank | DailyProgress | optic | RCAV is locked | Don't change the way the EOM is wired !!
If you do so the case is not connected to
GND/protective earth anymore and your high |
|
|
797
|
Wed Jan 25 02:51:44 2012 |
frank, tara | DailyProgress | optic | Faraday Isolator is back | With the new EOM bases, we can place 2
EOMs and the Faraday Isolator back in to
the setup. |
|
|
799
|
Wed Jan 25 23:41:38 2012 |
frank, tara | DailyProgress | optic | not much improvement on mode matching | We tried to redo the mode matching to RCAV
by adjusting the lense position using translational
stages. However the result does not improve |
|
|
801
|
Thu Jan 26 12:40:21 2012 |
Tara | Notes | optic | Dual periscope base | I fixed the drawing for periscope
base. Will submit to the machine shop soon. |
|
|
805
|
Sat Jan 28 02:41:45 2012 |
Frank | Photos | optic | photos of cavity input optics | just for reference which part is/was where
for later...
|
|
|
844
|
Sun Feb 26 17:40:43 2012 |
tara | DailyProgress | optic | beam realignment after new seismic stack installation | I'm trying to re-align the beams to the
cavities. Due to the new RTV springs for
the seismic stack, the cavities' natural |
|
|
845
|
Mon Feb 27 10:56:43 2012 |
tara | DailyProgress | optic | beam realignment after new seismic stack installation | I realigned ACAV and found TEM00, but now
the transmitted beam is completely missed
the opening on the insulation, it is off |
|
|
905
|
Tue Apr 10 00:50:56 2012 |
frank, tara | DailyProgress | optic | bad PBS | We noticed wide angle scattered light behind
the PBS in front of RCAV. The scattering
source is probably the curved mirror behind |
|
|
906
|
Wed Apr 11 02:44:29 2012 |
frank, tara | DailyProgress | optic | bad PBS | Update, beat measurement after several
optics replacement. Peaks around 10 Hz, 35
Hz show up this time. |
|
|
912
|
Fri Apr 13 03:15:12 2012 |
koji,frank,tara | DailyProgress | optic | vibration damping on optics | We tried to damp mechanical peaks from
each optics. For now, by putting a rubber
piece on a mirror mount can suppress mechanical |
|
|
915
|
Sat Apr 14 06:03:23 2012 |
frank,tara | DailyProgress | optic | vibration damping on optics | We are damping most of the optics
with rubber cones. There are a few peaks
that we still could not find their origins. |
|
|
916
|
Mon Apr 16 02:20:58 2012 |
tara | DailyProgress | optic | vibration damping on optics | I measured beat signal, after damping most
of the optics, realigning the beams to the
cavities, measured the slope of error signals |
|
|
919
|
Mon Apr 16 16:21:01 2012 |
tara | Notes | optic | windows for vacuum chamber | I'm checking the properties/prices/availability
of window for the vacuum chamber.
|
|
|
921
|
Mon Apr 16 22:02:08 2012 |
tara | DailyProgress | optic | vibration damping on optics | I forgot to change the code to disable
the air springs, now the seismic coupling
makes more sense. |
|
|
922
|
Tue Apr 17 19:51:54 2012 |
tara | Notes | optic | windows for vacuum chamber | If we go with plan2,
1)window and flange
I think the window size |
|
|
923
|
Wed Apr 18 00:49:07 2012 |
tara | DailyProgress | optic | vibration damping on optics | I planned to measure the beat at night
with the air springs activated, but the power
went out around 11:45 pm. I think the temperature |
|
|
926
|
Thu Apr 19 03:12:23 2012 |
tara | Notes | optic | windows for vacuum chamber |
I'm searching DCC for window/viewport
examples. The following drawings give me |
|
|
931
|
Sun Apr 22 23:09:38 2012 |
tara | Notes | optic | windows for vacuum chamber | For small window option, I can either have
it made from scratch ( based on LIGO's drawing)
or buy the commercial windows from Thorlabs. |
|
|
932
|
Mon Apr 23 16:52:16 2012 |
tara | Notes | optic | windows for vacuum chamber | I asked Steve about the choices, he thought
the Thorlabs window should be ok for us.
What |
|
|
938
|
Wed Apr 25 10:44:29 2012 |
Frank | Notes | optic | windows for vacuum chamber | I don't know how you gonna make the knife
edge on the 10" flange of centered and
wedged! If you put the small CF flanges on |
|
|
940
|
Thu Apr 26 08:35:57 2012 |
steve | Notes | optic | windows for vacuum chamber |
|
|
|
943
|
Fri Apr 27 08:46:24 2012 |
Frank | Notes | optic | windows for vacuum chamber | cavity mirrors are parallel to the end
surface of the chamber (not completely, but
pretty close; changes every time we touch |
|
|
949
|
Tue May 1 20:37:16 2012 |
tara | Notes | optic | windows for vacuum chamber | I got the reply from Thorlab the flange
can't accept the thicker optical windows.
So I think we have to make our own custom |
|
|
960
|
Fri May 11 17:52:17 2012 |
tara | Notes | optic | windows for vacuum chamber | Nice reference for O-ring + groove design.
I'll put it on CTN wiki as well.
|
|
|
964
|
Wed May 16 22:27:13 2012 |
tara | Notes | optic | windows for vacuum chamber | I finished the drawing for new vacuum windows.
The o-ring for the windows will be #223 (1/8"
thickness). I'll consult with Steve one more |
|
|
969
|
Mon May 21 16:53:38 2012 |
tara | Notes | optic | windows for vacuum chamber | I edited the drawing for 10"
flange. The wedge surfaces for 2" windows
are tilted by 2 degrees sideway. |
|
|
971
|
Wed May 23 15:04:53 2012 |
steve | Notes | optic | windows for vacuum chamber |
2" optics with 2
degrees of wedge will have 0.375" thickness |
|
|
985
|
Wed Jun 13 11:12:55 2012 |
tara | Notes | optic | cavity mirrors | Frank showed me where we keep the spare
cavity mirrors. They are in a cardboard box
labeled REO in the left cabinet. There are |
|
|
1119
|
Thu Mar 14 18:20:04 2013 |
tara | Notes | optic | fused silica pmc | Peter told me that the fused silica
pmc currently used in the lab is bonded by
Vac-seal epoxy. So we don't need to polish |
|
|
1121
|
Fri Mar 15 11:23:45 2013 |
tara | Notes | optic | AlAs/GaAs | I'm thinking about the spec for AlAs/GaAs
coatings. Here is the list of what I have:
coating on concave side |
|