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Highspeed multiplexed heterodyne interferometry

Isleif, Katharina-S.; Gerberding, Oliver; Köhlenbeck, Sina; Sutton, Andrew; Sheard, Benjamin; Goßler, Stefan; Shaddock, Daniel; Heinzel, Gerhard; Danzmann, Karsten

Description

Digitally enhanced heterodyne interferometry is a metrology technique that uses pseudo-random noise codes for modulating the phase of the laser light. Multiple interferometric signals from the same beam path can thereby be isolated based on their propagation delay, allowing one to use advantageous optical layouts in comparison to classic laser interferometers. We present here a high speed version of this technique for measuring multiple targets spatially separated by only a few...[Show more]

dc.contributor.authorIsleif, Katharina-S.
dc.contributor.authorGerberding, Oliver
dc.contributor.authorKöhlenbeck, Sina
dc.contributor.authorSutton, Andrew
dc.contributor.authorSheard, Benjamin
dc.contributor.authorGoßler, Stefan
dc.contributor.authorShaddock, Daniel
dc.contributor.authorHeinzel, Gerhard
dc.contributor.authorDanzmann, Karsten
dc.date.accessioned2016-06-01T01:54:45Z
dc.date.available2016-06-01T01:54:45Z
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/1885/101923
dc.description.abstractDigitally enhanced heterodyne interferometry is a metrology technique that uses pseudo-random noise codes for modulating the phase of the laser light. Multiple interferometric signals from the same beam path can thereby be isolated based on their propagation delay, allowing one to use advantageous optical layouts in comparison to classic laser interferometers. We present here a high speed version of this technique for measuring multiple targets spatially separated by only a few centimetres. This allows measurements of multiplexed signals using free beams, making the technique attractive for several applications requiring compact optical set-ups like for example space-based interferometers. In an experiment using a modulation and sampling rate of 1.25 GHz we are able to demonstrate multiplexing between targets only separated by 36 cm and we achieve a displacement measurement noise floor of < 3 pm/ √ Hz at 10 Hz between them. We identify a limiting excess noise at low frequencies which is unique to this technique and is probably caused by the finite bandwidth in our measurement set-up. Utilising an active clock jitter correction scheme we are also able to reduce this noise in a null measurement configuration by one order of magnitude.
dc.format8 pages
dc.publisherOptical Society of America
dc.rights© 2014 Optical Society of America. This is an open access journal https://www.osapublishing.org/oe/journal/oe/about.cfm (Publisher journal website 1/6/2016).
dc.sourceOptics Express
dc.subjectinstrumentation
dc.subjectmeasurement
dc.subjectmetrology
dc.subjectinterferometry
dc.subjectoptical instruments
dc.subjectphase
dc.subjectmodulation
dc.subjectsensing
dc.subjectsensor
dc.titleHighspeed multiplexed heterodyne interferometry
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume22
dcterms.dateAccepted2014-09-04
dc.date.issued2014-10-06
local.identifier.absfor020500
local.identifier.ariespublicationU3488905xPUB4686
local.publisher.urlhttp://www.osa.org/
local.type.statusPublished Version
local.contributor.affiliationIsleif, Katharina-S, Max Planck Institute for Gravitational Physics, Leibniz Universitat Hannover, Germany
local.contributor.affiliationGerberding, Oliver, Max-Planck Institute for Gravitational Physics, Germany
local.contributor.affiliationKohlenbeck, Sina, Max Planck Institute for Gravitational Physics, Leibniz Universitat Hannover, Germany
local.contributor.affiliationSutton, Andrew, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationSheard, Benjamin, Leibniz University Hannover, Germany
local.contributor.affiliationGossler, S, University of Hannover, Germany
local.contributor.affiliationShaddock, Daniel, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationHeinzel, G, Max Planck Institute for Gravitational Physics, Germany
local.contributor.affiliationDanzmann, Karsten, Max Planck Institute for Quantum Optics, Germany
local.identifier.essn1094-4087
local.bibliographicCitation.issue20
local.bibliographicCitation.startpage24689
local.bibliographicCitation.lastpage24696
local.identifier.doi10.1364/OE.22.024689
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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