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1/ f Noise Mitigation in an Opto-Mechanical Sensor with a Fabry–Pérot Interferometer

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العنوان: 1/ f Noise Mitigation in an Opto-Mechanical Sensor with a Fabry–Pérot Interferometer
المؤلفون: Andrea M. Nelson, Jose Sanjuan, Felipe Guzmán
المصدر: Sensors, Vol 24, Iss 6, p 1969 (2024)
بيانات النشر: MDPI AG
سنة النشر: 2024
المجموعة: Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية: opto-mechanics, displacement measurement, 1/ f noise, interferometry, Fabry–Pérot cavity, Chemical technology, TP1-1185
الوصف: Low-frequency and 1/ f noise are common measurement limitations that arise in a variety of physical processes. Mitigation methods for these noises are dependent on their source. Here, we present a method for removing 1 / f noise of optical origin using a micro-cavity Fabry–Pérot (FP) interferometer. A mechanical modulation of the FP cavity length was applied to a previously studied opto-mechanical sensor. It effectively mimics an up-conversion of the laser frequency, shifting signals to a region where lower white-noise sources dominate and 1 / f noise is not present. Demodulation of this signal shifts the results back to the desired frequency range of observation with the reduced noise floor of the higher frequencies. This method was found to improve sensitivities by nearly two orders of magnitude at 1 Hz and eliminated 1/ f noise in the range from 1 Hz to 4 kHz. A mathematical model for low-finesse FP cavities is presented to support these results. This study suggests a relatively simple and efficient method for 1 / f noise suppression and improving the device sensitivity of systems with an FP interferometer readout.
نوع الوثيقة: article in journal/newspaper
اللغة: English
تدمد: 1424-8220
Relation: https://www.mdpi.com/1424-8220/24/6/1969; https://doaj.org/toc/1424-8220; https://doaj.org/article/af002ad433904ed1aed4fd94ecc9f769
DOI: 10.3390/s24061969
الاتاحة: https://doi.org/10.3390/s24061969
https://doaj.org/article/af002ad433904ed1aed4fd94ecc9f769
رقم الانضمام: edsbas.335ABE68
قاعدة البيانات: BASE
الوصف
تدمد:14248220
DOI:10.3390/s24061969