Lock Acquisition

Lock acquisition scheme has to be planed carefully because it was a big problem in the first generation large-scale interferometers.

Probabilistic lock (a.k.a. lucky lock) won't probably work. Other locking schemes such as the arm pre-locking has to be considered.

Auxiliary Lock System

Also known as green laser lock, this scheme will make use of auxiliary lasers to lock the arm cavities first.

Servo simulation

Optical Table Layout

Purchase List

SVN archive

SVN directory

Oscillator phase noise requirement for PLL local oscillator

See here.

Overview of Green Lock Scheme


Lock procedure


Block diagram


Description of the blocks

Phase Comparison

Frequency noise of NPRO

Shot noise

LCGT/subgroup/ifo/ISC/TaskList/LockAcquisition (last edited 2012-05-08 16:20:01 by YoichiAso)