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Size: 572
Comment:
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Size: 909
Comment:
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| 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 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: |
| H = 5.9052 x 10-6 [counts / m] |
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| Line 27: | Line 29: |
| * 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
- H = 5.9052 x 10-6 [counts / m]
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.)