Differences between revisions 2 and 3

Green Laser Injection for Arm Pre-Lock

We plan to install green lasers, which are phase locked to the PSL laser, at each end station to pre-lock the arm cavities before the lock acquisition.

Basic Concept

Noise Requirement

I'd say the arm cavity length should not change more than 1/100 of the resonance width in the time scale of 10sec.BR For this to be fulfilled, the RMS fluctuation of the cavity length must be suppressed below 1e-11m level.BR Does this make sense ?

-  ⇤ ← Revision 2 as of 2009-08-25 00:22:45 → 
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  Editor: YoichiAso
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+   ← Revision 3 as of 2009-08-25 00:24:44 → ⇥
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  Editor: YoichiAso
  Comment:
-Deletions are marked like this.
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-== Noise Requirements ==
I'd say the arm cavity length should not change more than 1/100 of the resonance width in the time scale of 10sec.
For this to be fulfilled, the RMS change of the cavity length must be suppressed below 1e-11m level.
+== Noise Requirement ==
I'd say the arm cavity length should not change more than 1/100 of the resonance width in the time scale of 10sec.[[BR]]
For this to be fulfilled, the RMS fluctuation of the cavity length must be suppressed below 1e-11m level.[[BR]]
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+=== Noise Sources ===
==== PLL phase noise ====
==== Phase noise from the cavity common mode motion ====