Optical Truss Interferometer for the LISA Telescope

The LISA telescopes must exhibit an optical path length stability of \(\frac{\mathrm{pm}}{\sqrt{\mathrm{Hz}}}\) in the mHz observation band to meet mission requirements. The optical truss interferometer is a proposed method to aid in the ground testing of the telescopes, as well as a risk-mitigation...

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Bibliographic Details
Published inarXiv.org
Main Authors Kylan Jersey, Harley-Trochimczyk, Ian, Zhang, Yanqi, Guzman, Felipe
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.07.2023
Subjects
Fabry-Perot interferometers
Ground tests
Holes
Interferometers
Physics - Instrumentation and Methods for Astrophysics
Physics - Optics
Sensitivity analysis
Telescopes
Trusses
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Summary:The LISA telescopes must exhibit an optical path length stability of \(\frac{\mathrm{pm}}{\sqrt{\mathrm{Hz}}}\) in the mHz observation band to meet mission requirements. The optical truss interferometer is a proposed method to aid in the ground testing of the telescopes, as well as a risk-mitigation plan for the flight units. This consists of three Fabry-Perot cavities mounted to the telescope which are used to monitor structural displacements. We have designed and developed a fiber-based cavity injection system that integrates fiber components, mode-matching optics, and a cavity input mirror into a compact input stage. The input stages, paired with return mirror stages, can be mounted to the telescope to form the optical truss cavities. We performed a thorough sensitivity analysis using various simulation methods to support the fabrication and assembly of three first-generation prototype cavities, each of which exhibited a satisfactory performance based on our models.
ISSN:2331-8422
DOI:10.48550/arxiv.2305.19425