On broadening techniques for a high-resolution optical accelerometers

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-04-12 DOI:10.1016/j.sna.2025.116540

A. Amorosi , L. Amez-Droz , M. Zeoli , B. Thibaut , M. Teloi , M.H. Lakkis , A. Sider , C. Di Fronzo , C. Collette

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引用次数: 0

Abstract

The paper discusses techniques for broadening the frequency bandwidth of a low natural frequency optical accelerometer to the [0.01 - 100] Hz band while preserving high resolution. The sensor mechanics is made of a leaf-spring suspended proof mass with a natural frequency of 2.8 Hz. The motion of the proof mass is read out with a custom design of a homodyne quadrature Michelson interferometer. The quadrature interferometer allows for precise measurement of the mass motion over several multiples of the laser wavelength (1550 nm) with a relative resolution measured at

2 \times 1 0^{- 13}

\sqrt{Hz}

at 10 Hz. Two different strategies are employed for extending the corner frequency of the sensor bandwidth above the sensor mechanical frequency. They consist of a force feedback loop and an electronic filtering of the sensor’s response. Both methods were experimentally applied and compared in terms of resolution. The sensor has a 10 × 10 × 10 cm

^{3}

compact design. The combination of the high-resolution readout and the large measurement bandwidth makes this sensor suitable for applications where high performance in the low-frequency regime is needed, namely active seismic isolation for ground-based scientific instruments (e.g. gravitational wave detectors) and ground compensation scheme in absolute quantum gravimeters.

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...