Scattering loss in precision metrology due to mirror roughness

Author:

Drori Yehonathan1,Eichholz Johannes12ORCID,Edo Tega13,Yamamoto Hiro1,Enomoto Yutaro14ORCID,Venugopalan Gautam1ORCID,Arai Koji1ORCID,Adhikari Rana X.1

Affiliation:

1. California Institute of Technology

2. The Australian National University

3. The University of Sheffield

4. The University of Tokyo

Abstract

Optical losses degrade the sensitivity of laser interferometric instruments. They reduce the number of signal photons and introduce technical noise associated with diffuse light. In quantum-enhanced metrology, they break the entanglement between correlated photons. Such decoherence is one of the primary obstacles in achieving high levels of quantum noise reduction in precision metrology. In this work, we compare direct measurements of cavity and mirror losses in the Caltech 40 m gravitational-wave detector prototype interferometer with numerical estimates obtained from semi-analytic intra-cavity wavefront simulations using mirror surface profile maps. We show a unified approach to estimating the total loss in optical cavities (such as the LIGO gravitational detectors) that will lead towards the engineering of systems with minimum decoherence for quantum-enhanced precision metrology.

Funder

National Science Foundation

Science and Technology Facilities Council

Australian Research Council

Publisher

Optica Publishing Group

Subject

Computer Vision and Pattern Recognition,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

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