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

doi:10.1088/1361-6382/aab2e9

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 Journal › Article › Academic › peer-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 language	English
Article number	095007
Journal	Classical and Quantum Gravity
Volume	35
Issue number	9
DOIs	https://doi.org/10.1088/1361-6382/aab2e9
Publication status	Published - 22 Mar 2018
Externally published	Yes

Funding

We thank John Bryant for technical support. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement Number 701264.

Keywords

homodyne detection
optical interferometry
optomechanics

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10.1088/1361-6382/aab2e9

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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.",

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AU - Cooper, S. J.

AU - Collins, C. J.

AU - Green, A. C.

AU - Hoyland, D.

AU - Speake, C. C.

AU - Freise, A.

AU - Mow-Lowry, C. M.

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AB - 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.

KW - homodyne detection

KW - optical interferometry

KW - optomechanics

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

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