The effect of a laser beam displacement on parametric oscillatory instabilities for Advanced LIGO |
| |
Authors: | D HeinertSE Strigin |
| |
Institution: | a Institut für Festkörperphysik, Friedrich-Schiller-Universität, 07743 Jena, Germany b Physics Department, Moscow State University, Moscow 119991, Russia |
| |
Abstract: | The arm cavities of real gravitational wave detectors can show small deviations like a tilt or a spatial shift between the cavity mirrors. These deviations lead to a separation of the optical mode centres with respect to the mirror?s centre. In this Letter we perform the computation of parametric instable modes considering the described displacement. We further analyse the possibility of parametric oscillatory instability in the Advanced LIGO interferometer for the case of a displaced arm cavity. Our results reveal an additional number of optical and elastic mode combinations due to a displacement that can give rise to the undesirable effect of parametric oscillatory instability. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|