Contents
Information of Core Optics
Basic information
Substrate Material: The material of the substrate is Corning 7980 Fused Silica, grade UV-0A. Link to the data sheet of Corning 7980 Alternate link as the old page seems to have moved
Calculation of the RoC spec Considerations on the parameters of PRC/SRC
- PRMs and SRMs will have the wedge angle larger than the spec (see below). PRMs were returned for repolish. Thus, their wedge angles might be vary. This is to be confirmed.
Status
Name |
Delivery |
Phase Map Measurement |
Stand off gluing |
Magnet gluing |
Hanging |
SOS tower installation |
Current Location |
PRMU02 |
done |
Oct 8, 2010 |
- |
- |
- |
- |
PRM (BS chamber) |
PRMU03 |
done |
Oct 8, 2010 |
- |
- |
- |
- |
40m |
PRMU04 |
done |
Oct 8, 2010 |
- |
- |
- |
- |
Adv. Thin Film (Oct 25, 2010) |
SRMU01 |
done |
Jan 25, 2010 |
- |
- |
- |
- |
Adv. Thin FIlm (Oct 25, 2010) |
SRMU03 |
done |
Jan 25, 2010 |
done |
done |
done |
done |
(Clean Room, storage) |
SRMU04 |
done |
Jan 25, 2010 |
done |
done |
done |
done |
SRM (ITMY Chamber) |
ITMU01 |
done |
Jan 22, 2010 & May 29, 2020 |
- |
- |
- |
- |
40m |
ITMU02 |
done |
Jan 22, 2010 & May 29, 2020 |
- |
- |
- |
- |
40m |
ITMU03 |
done |
Jan 22, 2010 |
done |
done |
done |
done |
ITMY (East arm) |
ITMU04 |
done |
Jan 22, 2010 |
done |
done |
done |
done |
ITMX (South arm) |
ETMU05 |
done |
Oct 18, 2010 @ATF |
done |
done |
done |
- |
ETMY (East) |
ETMU06 |
done |
Oct 18, 2010 @ATF & Jun 16, 2020 |
- |
- |
- |
- |
40m |
ETMU07 |
done |
Oct 18, 2010 @ATF |
done |
done |
done |
done |
ETMX (South) |
ETMU08 |
done |
Oct 18, 2010 @ATF |
- |
- |
- |
- |
40m |
BS is unchanged from the previous one.
Specifications
Specifications Summary: E080460-05-D
PRM Specifications
RM Blank Drawing D080487-00-D
RM Blank Spec E080455-00-D
PRM Substrate Drawing: Dia=75+/-0.5mm, Th=25mm+0/-0.5mm, Wedge = 2deg+/-5min D080486-00-D
PRM Polish: RoC(S1)=115.5+/-5 m, RoC(S2)>5625 m E080452-02-D
PRM Coating: T(S1,HR)=5.75+/-0.25%, R(S2,AR)<300ppm E080458-03-D
SRM Specifications
RM Blank Drawing D080487-00-D
RM Blank Spec E080455-00-D
SRM Substrate Drawing: Dia=75+/-0.5mm, Th=25mm+0/-0.5mm, Wedge = 2deg+/-5min D080489-00-D
SRM Polish: RoC(S1)=142+/-5 m, RoC(S2)>5625 m E080453-02-D
SRM Coating: T(S1,HR)=10.0+/-0.5%, R(S2,AR)<300ppm E080459-01-D
ITM Specifications
ITM Blank Drawing D080488-00-D
ITM Blank Spec E080456-00-D
ITM Substrate Drawing: Dia=75+/-0.5mm, Th=25mm+0/-0.5mm, Wedge = 2deg+/-5min D080490-00-D
ITM Polish: RoC(S1)>5623 m, RoC(S2)>5625 m E080454-00-D
ITM Coating: T(S1,HR,1064nm)=1.4%+/-0.05%, T(S1,HR,532nm)=1.0%-2.5% (1.5% target), R(S2,AR,1064nm)=500ppm+/-100ppm, R(S2,AR,532nm)<1000ppm E080457-02-D
ETM Specifications
ETM Blank Drawing D0902842-00
ETM Blank Spec E0900381
ETM Substrate Drawing: Dia=75+/-0.5mm, Th=25mm+0/-0.5mm, Wedge = 2.5deg+/-5min D0902467-00
ETM Polish: RoC(S1)=57.37+/-0.6 m, RoC(S2)>5625 m E0900379-00
ETM Coating: T(S1,HR,1064nm)=15ppm+/-10ppm, T(S1,HR,532nm)=5.0%+/-3% (+/-1% target), R(S2,AR,1064nm)<300ppm, R(S2,AR,532nm)<1000ppm E0900378-01
Pre-installation evaluation
SN |
Wedge |
RoC S1 [m] |
S1 T |
S2 R |
Note |
|||||
Coastline |
ATF |
LIGO Wyco |
LIGO Zygo |
@1064nm |
@532nm |
@1064nm |
@532nm |
|||
PRMU02 |
2.70deg (2deg42min) |
115.6 |
- |
- |
122.1 |
5.637% |
|
160ppm |
|
PRM |
PRMU03 |
2.72deg (2deg43min) |
116.3 |
- |
- |
122.8 |
|
||||
PRMU04 |
2.67deg (2deg40min) |
117.4 |
121.99 |
- |
124.2 |
|
||||
|
||||||||||
SN |
Wedge |
RoC S1 [m] |
S1 T |
S2 R |
Note |
|||||
Coastline |
ATF |
LIGO Wyco |
LIGO Zygo |
@1064nm |
@532nm |
@1064nm |
@532nm |
|||
SRMU01 |
2.70deg (2deg42min) |
142.3 |
147.69 |
148.8 |
150.2 |
9.903% |
98.1% |
67.6ppm |
23.6% |
|
SRMU02 |
2.68deg (2deg41min) |
145.0 |
- |
- |
- |
not delivered one |
||||
SRMU03 |
2.68deg (2deg41min) |
142.1 |
- |
149.1 |
- |
|
||||
SRMU04 |
2.73deg (2deg44min) |
- |
- |
148.1 |
- |
SRM, Wedge from Ramin's e-mail |
||||
|
||||||||||
SN |
Wedge |
RoC S1 [m] |
S1 T |
S2 R |
Note |
|||||
Coastline |
ATF |
LIGO Wyco |
LIGO Zygo |
@1064nm |
@532nm |
@1064nm |
@532nm |
|||
ITMU01 |
- |
- |
- |
29.2e3 |
- |
1.384% |
1.094% |
417ppm |
197ppm |
|
ITMU02 |
1.00deg (1deg0min) |
- |
- |
24.5e3 |
- |
|
||||
ITMU03 |
1.03deg (1deg2min) |
- |
- |
-883.4e3 |
- |
ITMY |
||||
ITMU04 |
- |
- |
- |
83.1e3 |
- |
ITMX |
||||
|
||||||||||
SN |
Wedge |
RoC S1 [m] |
S1 T |
S2 R |
Note |
|||||
Coastline |
ATF |
LIGO Wyco |
LIGO Zygo |
@1064nm |
@532nm |
@1064nm |
@532nm |
|||
ETMU05 |
2.35deg (2deg21min) |
57.6 |
60.26 |
- |
- |
13.7ppm |
4.579% |
93.3ppm |
950ppm |
ETMY |
ETMU06 |
2.36deg (2deg22min) |
57.4 |
54.58 |
- |
- |
|
||||
ETMU07 |
2.36deg (2deg22min) |
57.1 |
59.48 |
- |
- |
ETMX |
||||
ETMU08 |
2.36deg (2deg22min) |
57.9 |
54.80 |
- |
- |
|
||||
- The PRMs/SRMs have larger wedge (~2.7deg) than the spec (2 deg).
- The ITMs have ~1deg wedge instead of 2 deg.
Mirror metrology
Post-installation evaluation
- Arm cavity characterization for 1064nm
- Finesse
- Visibility
- Roundtrip loss
- Arm cavity characterization for 532nm
- Finesse
- Visibility
- Roundtrip loss
- Power/Signal recycling gain
- g-factor measurement (mode spacing)
- Longitudinal mode spacing (FSR)
- Spacial mode spacing
Information of Pre-2010 RSE Optics
Page to tabulate all known properties of our suspended optics
http://www.ligo.caltech.edu/~gari/40MAsBuilt.htm
i.e. R's, T's, mass, size, loss, etc.
Notes on Installed Suspensions
- PRM was pulled from the vacuum in August 08 after an earthquake. A wire standoff was found to have come off, and was sitting on the optical table. The standoff was replaced. There is no guide rod on the left/south side.
Optics for 40 Meter RSE Experiment
Serial No |
Blank Spec. |
Substrate Spec. |
Substrate Drawing |
Coating Spec. |
Notes |
Vendor Data |
LIGO Data |
Status |
Location |
ROC (m) |
BS01 |
|
|
40m |
10320 |
||||||
BS02 |
|
|
CIT |
-20000 |
||||||
BS03 |
not polished |
|
|
|
|
|
|
|
|
|
ETM01 |
|
Reserved for Sam W |
CIT |
58.27 unc |
||||||
ETM02 |
|
|
40m-etmy |
57.68 unc |
||||||
ETM03 |
|
|
40m-etmx |
57.57 unc |
||||||
Blank |
CIT |
|
|
|
|
|
|
|
||
ITM01 |
|
|
|
40m-itmy |
7210 unc |
|||||
ITM02 |
|
|
|
CIT |
5980 |
|||||
ITM03 |
|
|
|
40m-itmx |
7280 |
|||||
ITM04 |
|
Spare |
20nm rms |
not meas |
unc |
CIT |
||||
MCCM01 |
|
|
|
|
CIT |
18.4m |
||||
MCCM02 |
|
|
|
|
CIT |
|||||
MCFM01 |
|
|
Coated |
U Florida |
||||||
MCFM02 |
|
|
Coated |
CIT |
||||||
MCFM03 |
|
|
Coated |
CIT |
||||||
SRM01 |
|
|
CIT |
367 |
||||||
SRM02 |
Spare |
Uncoated |
U Florida |
377 |
||||||
SRM03 |
|
|
CIT |
386 |
||||||
PRM01 |
6.5%R |
|
CIT |
355 |
||||||
PRM02 |
7.0%R |
|
CIT |
356 |
||||||
PRM03 |
Spare |
LMA-Coating |
CIT |
370 |
||||||
PRM04 |
8.0%R |
|
CIT |
343 |
Last Updated on 05/23/02
By GariLynn Billingsley
Email: Billingsley_G at LIGO
Link to 40m optical layout
This diagram is extremely useful but till this link was added, hard to find on the wiki. Schematic Optical Layout