Parameter |
LCGT BRSE(2004)1 |
LCGT BRSE(2007)2 |
LCGT BRSE(2009) |
LCGT DRSE(2009) |
units |
Wave length |
1064 |
1064 |
1064 |
1064 |
nm |
Initial Laser Power |
300 |
150 |
150 |
150 |
W |
Injecting Laser Power into IFO |
100 |
75(carrier) |
75 |
75 |
W |
Modulation depth |
Not defined |
Not defined |
|
|
|
RF freq 1 |
15.025(AM) |
9.98125(AM) |
|
|
MHz |
RF freq 2 |
49.5825(PM) |
59.8875(PM) |
|
|
MHz |
MC1 length |
9.755 |
9.755 |
|
|
m |
MC2 length |
199.78 |
180.463? |
|
|
m |
MC1 FSR |
15.525 |
15.525 |
|
|
MHz |
MC2 FSR |
0.75125 |
0.831771? |
|
|
MHz |
MC1 Finesse |
1720 |
1720 |
|
|
MHz |
MC2 Finesse |
1000 |
1000 |
|
|
MHz |
|
|
|
|
|
|
EM Reflectivity |
0.99995 |
0.99995 |
0.99995 |
0.99995 |
|
FM Reflectivity |
0.995 |
0.996 |
0.992 |
0.992 |
|
PRM Reflectivity |
0.76 |
0.80 |
0.77 |
0.77 |
|
SRM Reflectivity |
0.68 |
0.77 |
0.88 |
0.88 |
|
BS Reflectivity |
0.5? |
0.5? |
0.5 |
0.5 |
|
EM Transmittance |
2e-5 |
2e-5 |
3e-5 |
3e-5 |
|
FM Transmittance |
0.00497 |
0.00399 |
0.00798 |
0.00798 |
|
PRM Transmittance |
0.23997 |
0.19999 |
0.22998 |
0.22998 |
|
SRM Transmittance |
0.31997 |
0.22999 |
0.11998 |
0.11998 |
|
BS Transmittance |
0.49997? |
0.49999? |
|
|
|
EM Loss |
3e-5 |
1e-5(3e-5?) |
2e-5 |
2e-5 |
|
FM Loss |
3e-5 |
1e-5(3e-5?) |
2e-5 |
2e-5 |
|
PRM Loss |
3e-5 |
1e-5(3e-5?) |
2e-5 |
2e-5 |
|
SRM Loss |
3e-5 |
1e-5(3e-5?) |
2e-5 |
2e-5 |
|
BS Loss |
3e-5 |
1e-5(3e-5?) |
|
|
|
|
|
|
|
|
|
Arm cavity length |
3000 |
3000 |
3000 |
3000 |
m |
PR cavity length |
14.9899? |
45? |
|
|
m |
PRM-BS length |
Not defined |
Not defined |
|
|
m |
BS-FM X length |
Not defined |
Not defined |
|
|
m |
BS-FM Y length |
Not defined |
Not defined |
|
|
m |
Asymmetry length |
1.4990? |
7.5? |
|
|
m |
SR cavity length |
17.9878? |
45? |
|
|
m |
SRM-BS length |
Not determined |
Not determined |
|
|
m |
SRC detuning phase |
pi/2 |
pi/2 |
pi/2 |
1.343 |
rad |
|
|
|
|
|
|
Arm cavity FSR |
0.05 |
0.05 |
|
|
MHz |
PRC cavity FSR |
19.3166 |
6.7 |
|
|
MHz |
Arm cavity Finesse |
1250 |
1548 |
777 |
777 |
|
Arm power gain |
796 |
987 |
|
|
|
Arm power(single) |
0.398 |
0.3859 |
0.202 |
0.202 |
MW |
PR gain |
10 |
10.63 |
11 |
11 |
|
PRC power on BS |
1000 |
797.14 |
825 |
825 |
W |
SR gain |
10 |
14.68 |
? |
N/A |
|
Arm cavity cut-off frequency |
|
16.14 |
31.8 |
31.8 |
Hz |
PR cavity cut-off frequency |
|
1.209e6 |
|
|
Hz |
PR-Arm cut-off frequency |
|
1.189 |
2.3 |
2.3 |
Hz |
Signal band |
|
236.9 |
|
|
Hz |
MICH contrast |
0.995 |
0.995 |
|
|
|
Other losses in PRC |
Not defined |
1e-3 |
0.02/PRG |
0.02/PRG |
|
Other losses in SRC |
Not defined |
|
0.02/SRG |
0.02/SRG |
|
|
|
|
|
|
|
EM mass |
50.9 |
30 |
30 |
30 |
kg |
FM mass |
50.9 |
30 |
30 |
30 |
kg |
PRM mass |
Not defined |
Not defined |
|
|
kg |
SRM mass |
Not defined |
Not defined |
|
|
kg |
BS mass |
Not defined |
Not defined |
|
|
kg |
|
|
|
|
|
|
EM ROC |
4500 |
4500 |
4500 |
4500 |
m |
FM ROC |
Infinity |
Infinity |
Infinity |
Infinity |
m |
FM AR ROC |
12 |
?? |
Infinity |
Infinity |
m |
PRM ROC |
0.81 |
?? |
|
|
m |
SRM ROC |
Not defined |
Not defined |
|
|
m |
BS ROC |
Infinity |
Infinity |
|
|
m |
|
|
|
|
|
|
EM AR Reflectivity |
Not defined |
1e-3 |
|
|
|
FM AR Reflectivity |
Not defined |
1e-3 |
|
|
|
PRM AR Reflectivity |
Not defined |
1e-3 |
|
|
|
SRM AR Reflectivity |
Not defined |
1e-3 |
|
|
|
BS AR Reflectivity |
Not defined |
1e-3 |
|
|
|
EM AR Loss |
Not defined |
Not defined |
|
|
|
FM AR Loss |
Not defined |
Not defined |
|
|
|
PRM AR Loss |
Not defined |
Not defined |
|
|
|
SRM AR Loss |
Not defined |
Not defined |
|
|
|
BS AR Loss |
Not defined |
Not defined |
|
|
|
|
|
|
|
|
|
EM absorption loss (bulk) |
20 |
20 |
|
|
ppm/cm |
FM absorption loss (bulk) |
20 |
20 |
20 |
20 |
ppm/cm |
EM absorption loss (coat) |
|
|
ppm |
||
FM absorption loss (coat) |
<1 |
<1 |
ppm |
||
PRM absorption loss |
5 |
5 |
|
|
ppm/cm |
SRM absorption loss |
5 |
5 |
|
|
ppm/cm |
BS absorption loss |
5 |
5 |
|
|
ppm/cm |
EM thickness |
18 |
15 |
15 |
15 |
cm |
FM thickness |
18 |
15 |
15 |
15 |
cm |
PRM thickness |
Not defined |
Not defined |
|
|
cm |
SRM thickness |
Not defined |
Not defined |
|
|
cm |
BS thickness |
Not defined |
Not defined |
|
|
cm |
EM bulk Loss |
1000 |
1000 |
|
|
ppm |
FM bulk Loss |
1000 |
1000 |
|
|
ppm |
PRM bulk Loss |
1000 |
1000 |
|
|
ppm |
SRM bulk Loss |
1000 |
1000 |
|
|
ppm |
BS bulk Loss |
1000 |
1000 |
|
|
ppm |
|
|
|
|
|
|
OMC input/output mirror reflectivity |
0.8 |
0.8 |
|
|
|
OMC end mirror reflectivity |
0.99995 |
0.99995 |
|
|
|
OMC length |
0.07 |
0.07 |
|
|
m |
OMC MC FSR |
4282 |
4282 |
|
|
MHz |
OMC Finesse |
14 |
14 |
|
|
MHz |
|
|
|
|
|
|
Quantum efficiency |
Not defined |
Not defined |
0.9 |
0.9 |
|
Frequency Stabilization band width |
10000 |
10000 |
|
|
Hz |
CARM control band width |
Not defined |
0.1 |
|
|
Hz |
DARM control band width |
Not defined |
1000 |
|
|
Hz |
PRC control band width |
Not defined |
1000 |
|
|
Hz |
MICH control band width |
Not defined |
10 |
|
|
Hz |
SRC control band width |
Not defined |
1000 |
|
|
Hz |
2004 data referred to LCGT design document 1.0. (1)
2007 data referred to LCGT design document 2.0 and TAC presentation at 2005/8/23 (2)