Searcharxiv⌕ Search

arXiv subjects

Terri Pearce

Publications and source records attributed to Terri Pearce.

2 recordsLinked to original sources
arXiv2025

In situ substrate birefringence characterization in gravitational wave detectors using a heterodyne polarimetry method

High-quality test mass substrates play essential roles in laser interferometric gravitational wave detectors. Inhomogeneous birefringence distribution in test mass substrates, however, can degrade the sensitivity of the detector by introducing the optical loss and disturbing the interferometer controls. In this paper, we present a heterodyne polarimetry method that enables in situ birefringence characterizations, hence diagnosing the gravitational wave interferometer. We experimentally demonstrate the proposed method with a tabletop setup. We also discuss its applicability to current and future gravitational wave detectors and the detectable limit.

physics.ins-det↗
arXiv2025

Development of a polarimetry method toward in-situ substrate birefringence characterization of ground-based gravitational wave detectors

Improving the sensitivity of gravitational wave detectors is necessary to enrich scientific outcome of gravitational wave astronomy. Birefringence in test mass mirrors of gravitational wave detectors can become an important factor for both current and next-generation gravitational wave detectors to achieve improved performance. In-situ birefringence characterization can become an essential diagnostic tool for detector performance, and needs to be established. We report a possible in-situ birefringence characterization method and its experimental results with a tabletop setup. The scheme proposed and demonstrated in this paper can be used as a diagnostic tool in large-scale gravitational wave detectors. We also discuss possible technological developments toward implementation in future gravitational wave detectors.

physics.ins-det↗