Double pass locking and spatial mode locking for gravitational wave detectors
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Cusack, B J
Shaddock, Daniel
Slagmolen, Bram
De Vine, Glenn
Gray, Malcolm
McClelland, David
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Institute of Physics Publishing
Abstract
We present novel techniques for overcoming problems relating to the use of high-power lasers in mode cleaner cavities for second generation laser interferometric gravitational wave detectors. Rearranging the optical components into a double pass locking regime can help to protect locking detectors from damage. Modulator thermal lensing can be avoided by using a modulation-free technique such as tilt locking, or its recently developed cousin, flip locking.
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Classical and Quantum Gravity