Thermal effects in the input optics of the enhanced laser interferometer gravitational-wave observatory interferometers

Katherine L. Dooley, Muzammil A. Arain, David Feldbaum, Valery V. Frolov, Matthew Heintze, Daniel Hoak, Efim A. Khazanov, Antonio Lucianetti, Rodica M. Martin, Guido Mueller, Oleg Palashov, Volker Quetschke, David H. Reitze, R. L. Savage, D. B. Tanner, Luke F. Williams, Wan Wu

Research output: Contribution to journalReview article

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

Original languageEnglish
Article number033109
JournalReview of Scientific Instruments
Issue number3
Publication statusPublished - 1 Mar 2012


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