LIGO Document G1300614-v1
- A presentation file for the Stefano Braccini prize 2012 at Pisa on May of 2013.
Currently LIGO (Laser Interferometric Gravitational wave Observatory) is under a major upgrade and will be online possibly in 2014 aiming a first detection. A big challenge in this type of interferometer is to precisely bring all the optical resonant cavities to the resonance point (for example with a precision of less than 1 nm for the 4 km cavities of LIGO). I will talk about an experimental demonstration of a new multicolor interferometric technique which employs auxiliary lasers in a different color from the main laser in order to aid the precision control.
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