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dc.contributor.authorZhang, Y.
dc.contributor.authorHines, A.S.
dc.contributor.authorValdes, G.
dc.contributor.authorGuzman, F.
dc.date.accessioned2021-09-24T21:02:51Z
dc.date.available2021-09-24T21:02:51Z
dc.date.issued2021
dc.identifier.citationZhang, Y., Hines, A. S., Valdes, G., & Guzman, F. (2021). Investigation and mitigation of noise contributions in a compact heterodyne interferometer. Sensors, 21(17).
dc.identifier.issn1424-8220
dc.identifier.doi10.3390/s21175788
dc.identifier.urihttp://hdl.handle.net/10150/661944
dc.description.abstractWe present a noise estimation and subtraction algorithm capable of increasing the sensitivity of heterodyne laser interferometers by one order of magnitude. The heterodyne interferometer is specially designed for dynamic measurements of a test mass in the application of sub-Hz inertial sensing. A noise floor of 3.31 × 10−11 m/√Hz at 100 mHz is achieved after applying our noise subtraction algorithm to a benchtop prototype interferometer that showed a noise level of 2.76 × 10−10 m/√Hz at 100 mHz when tested in vacuum at levels of 3 × 10−5 Torr. Based on the previous results, we investigated noise estimation and subtraction techniques of non-linear optical pathlength noise, laser frequency noise, and temperature fluctuations in heterodyne laser interferometers. For each noise source, we identified its contribution and removed it from the measurement by linear fitting or a spectral analysis algorithm. The noise correction algorithm we present in this article can be generally applied to heterodyne laser interferometers. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
dc.language.isoen
dc.publisherMDPI AG
dc.rightsCopyright © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectDisplacement measuring interferometry (DMI)
dc.subjectHeterodyne laser interferometer
dc.subjectInertial sensing
dc.subjectNoise subtraction
dc.titleInvestigation and mitigation of noise contributions in a compact heterodyne interferometer
dc.typeArticle
dc.typetext
dc.contributor.departmentWyant College of Optical Sciences, The University of Arizona
dc.identifier.journalSensors
dc.description.noteOpen access journal
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleSensors
refterms.dateFOA2021-09-24T21:02:51Z


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Copyright © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Except where otherwise noted, this item's license is described as Copyright © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).