A compact, large-range interferometer for precision measurement and inertial sensing

S. J. Cooper, C. J. Collins, A. C. Green, D. Hoyland, C. C. Speake, A. Freise, C. M. Mow-Lowry

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We present a compact, fibre-coupled interferometer with high sensitivity and a large working range. We propose to use this interferometer as a readout mechanism for future inertial sensors, removing a major limiting noise source, and in precision positioning systems. The interferometers peak sensitivity is 2 × 10-14 m √Hz-1 at 70 Hz and 7 × 10-11 m √Hz-1 at 10 mHz. If deployed on a GS-13 geophone, the resulting inertial sensing output will be limited by the suspension thermal noise of the reference mass from 10 mHz to 2 Hz.

Original languageEnglish
Article number095007
JournalClassical and Quantum Gravity
Volume35
Issue number9
DOIs
Publication statusPublished - 22 Mar 2018
Externally publishedYes

Keywords

  • homodyne detection
  • optical interferometry
  • optomechanics

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