LIGO Document T0900144-v3

Adv. LIGO Arm Length Stabilisation Design

Document #:
Document type:
T - Technical notes
Other Versions:
08 Nov 2018, 13:19
04 Mar 2015, 13:44
20 Jun 2012, 05:44
06 Jun 2010, 18:26
23 Jun 2009, 23:20
24 Apr 2009, 02:50
The design of the arm length fluctuation system. This system aids in the lock acquisition of the interferometer by stabilising the arm cavity length fluctuations to within ~1.3 nm.
Files in Document:
Notes and Changes:
Have NOT updated the Quad feedback results.

Other changes are:
- Modified the introduction including the start of the discussion of using the green heterodyne beatnote signal in the vertex to phase lock the auxiliary laser to the PSL.
- Made small changes to the Approach section, and in the end removed it.
- Removed section 6 In-Vacuum-Trans-Mon-Table (was a detailed description).
- Modified section~\ref{TransmonTable} 'In-Vacuum Transmon-Table', which is a short description with refences.
- Updated 'System Overview'.
- Removed fiber phase noise cancellation implementation and results.
- Added the Single Arm Test.
- Included the RF building blocks.

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