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Size: 788
Comment:
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Size: 899
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 12: | Line 12: |
| || C1:PSL-ISS_INSENSPD_F || || || C1:PSL-ISS_INSENSPD_FW || || || C1:PSL-ISS_INMONPD_F || || || C1:PSL-ISS_INSENPD_FW || || || C1:PSL-ISS_CSDRIVE_F || || || C1:PSL-ISS_CSDRIVE_FW || || |
|| C1:PSL-ISS_INSENSPD_F || In-loop photodiode || || C1:PSL-ISS_INSENSPD_FW || In-loop photodiode, whitened || || C1:PSL-ISS_INMONPD_F || Out-of-loop photodiode || || C1:PSL-ISS_INSENPD_FW || Out-of-loop photodiode, whitened || || C1:PSL-ISS_CSDRIVE_F || || || C1:PSL-ISS_CSDRIVE_FW || || |
The ISS measures the power fluctuations on a photodiode placed after the Mach Zender, but before the Mode Cleaner, and tries to servo that signal to zero.
The ISS is AC-coupled, so its purpose is not to control long-term drift. In its nominal configuration, it has gain from 1-100,000 Hz. This is to suppress the intensity noise in our measurement band.
The ISS servo sits on the PSL table; its a beige box with black front and back panels. All of the hooks for doing fast loop measurements are on that box.
The ISS actuator is the Current Shunt in the MOPA box.
DAQ channels
C1:PSL-ISS_INSENSPD_F |
In-loop photodiode |
C1:PSL-ISS_INSENSPD_FW |
In-loop photodiode, whitened |
C1:PSL-ISS_INMONPD_F |
Out-of-loop photodiode |
C1:PSL-ISS_INSENPD_FW |
Out-of-loop photodiode, whitened |
C1:PSL-ISS_CSDRIVE_F |
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C1:PSL-ISS_CSDRIVE_FW |
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