Thermal effects in the Input Optics of the Enhanced Laser Interferometer Gravitational-Wave Observatory interferometers

摘要

We present the design and performance of the LIGO Input Optics subsystem asimplemented for the sixth science run of the LIGO interferometers. The InitialLIGO Input Optics experienced thermal side effects when operating with 7 Winput power. We designed, built, and implemented improved versions of the InputOptics for Enhanced LIGO, an incremental upgrade to the Initial LIGOinterferometers, designed to run with 30 W input power. At four times the powerof Initial LIGO, the Enhanced LIGO Input Optics demonstrated improvedperformance including better optical isolation, less thermal drift, minimalthermal lensing and higher optical efficiency. The success of the Input Opticsdesign fosters confidence for its ability to perform well in Advanced LIGO.