Multi-Color Interferometry for Gravitational Wave Detectors

by Kiwamu Izumi (LIGO Hanford observatory)

Friday 24 May 2013, 14:30 → 16:00 Europe/Rome

131 (INFN Edificio C)

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.