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| ## page was renamed from Upgrade 08/Optics |
Coatings and Optics
This is a work in progress area for what optic and coatings we need.
Parameter |
ITMs |
ETMs |
PRM |
SRM |
FM (4x) |
|
HR Transmission 1064 nm |
0.014 * |
10 ppm |
0.055 +/-0.003 |
0.10 +/- 0.005 |
<0.01 |
|
HR Transmission 532 nm |
< 1000 ppm |
0.10 |
n/a |
n/a |
n.r. |
|
AR Reflection 1064 nm |
< 1000 ppm |
< 100 ppm |
< 300 ppm |
< 300 ppm |
<0.01 |
|
AR Reflection 532 nm |
<0.01 |
< 1000 ppm |
n/a |
n/a |
|
|
ROC |
Flat (>5 km) |
|
57.5 m? |
96.3 +50/-0 (96**) |
117.1+50/-20 (116.3**) |
inf |
Wedge angle |
1 deg (+/- 0.2 deg) |
1 deg |
1 deg |
1 deg |
1 deg |
BRBR* T_ITMnom = 0.014 +/- 0.002. All 3 ITMs in the same coating run to match the T, i.e. T_ITMY - T_ITMX < 0.0003. Tolerance in T_ITMnom is larger. ** Based on ETM and ITM ROC, assuming inf. thin optics.
Draft zip file of specs in .doc format: attachment:40mCOC-080723.zip
Specs of the folding mirrors for the recycling cavities
Name |
PR1 |
PR2 |
SR1 |
SR2 |
Size |
2"dia. X 3/8" thick |
2"dia. X 3/8" thick |
2"dia. X 3/8" thick |
2"dia. X 3/8" thick |
Incident angle |
2.5 deg |
36.5 deg |
39.9 deg |
17.1 deg |
HR Transmission 1064 nm |
500ppm |
< 100 ppm |
< 100ppm |
< 100ppm |
AR Reflection 1064 nm |
< 0.25% |
< 0.25% |
< 0.25% |
< 0.25% |
ROC |
Flat |
Flat |
Flat |
Flat |
Wedge angle |
1 deg |
1 deg |
1 deg |
1 deg |
Qty. |
2 |
2 |
2 |
2 |