|
Size: 573
Comment:
|
Size: 1061
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 10: | Line 10: |
| * Gain of whitening filter is at 30 dB * Demodulation phase = 5.6 deg (at which the I signal doesn't respond to the Michelson displacement). |
* ''' Gain of whitening filter = 30 dB ''' for both the I and Q. * ''' Demodulation phase = 5.6 deg ''' (at which the I signal doesn't respond to the Michelson displacement). |
| Line 17: | Line 17: |
| || REFL || 1.3 mW || | || REFL || 1.3 mW || |
| Line 20: | Line 20: |
| The values noted here were estimated from the OSAs | The values noted here were estimated from the OSAs at the AS and REFL ports. |
| Line 25: | Line 25: |
| ||<-2> Parameters || || Estimated Optical gain || 80 uW/m || || Measured pk-pk Michelson error signal || 1000 counts || || Raw optical gain || 5.9052 x10^9 [counts/meter] || |
|
| Line 27: | Line 32: |
| * Only FM5 (10:1000) was activated * Feeding the signal back to BS * Assumption : BS actuator has a pole at 1 Hz with Q = 5 * Time delay = (without considering the effects from the analog circuits and the down sampleing filters.) |
Michelson Noise budget
Measurements
- 7/Mar/2012 by KK and KI
Sensor in use
- AS55_Q
Gain of whitening filter = 30 dB for both the I and Q.
Demodulation phase = 5.6 deg (at which the I signal doesn't respond to the Michelson displacement).
- ~ very tiny DC light is on the RFPD
DC light
port name
DC power [mW]
AS55
~0
REFL
1.3 mW
Sidebands
- The values noted here were estimated from the OSAs at the AS and REFL ports.
Optical gains
Parameters
Estimated Optical gain
80 uW/m
Measured pk-pk Michelson error signal
1000 counts
Raw optical gain
5.9052 x10^9 [counts/meter]
Servo filters
- Only FM5 (10:1000) was activated
- Feeding the signal back to BS
- Assumption : BS actuator has a pole at 1 Hz with Q = 5
- Time delay = (without considering the effects from the analog circuits and the down sampleing filters.)