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Coherent beam combining using a 2D internally sensed optical phased array

Roberts, Lyle E.; Ward, Robert L.; Sutton, Andrew J.; Fleddermann, Roland; De Vine, Glenn; Malikides, Emmanuel A.; Wuchenich, Danielle M. R.; McClelland, David E.; Shaddock, Daniel A.

Description

Coherent combination of multiple lasers using an optical phased array (OPA) is an effective way to scale optical intensity in the far field beyond the capabilities of single fiber lasers. Using an actively phase locked, internally sensed, 2D OPA we demonstrate over 95% fringe visibility of the interfered beam, 𝜆/120 RMS output phase stability over a 5 Hz bandwidth, and quadratic scaling of intensity in the far field using three emitters. This paper presents a new internally sensed OPA...[Show more]

dc.contributor.authorRoberts, Lyle E.
dc.contributor.authorWard, Robert L.
dc.contributor.authorSutton, Andrew J.
dc.contributor.authorFleddermann, Roland
dc.contributor.authorDe Vine, Glenn
dc.contributor.authorMalikides, Emmanuel A.
dc.contributor.authorWuchenich, Danielle M. R.
dc.contributor.authorMcClelland, David E.
dc.contributor.authorShaddock, Daniel A.
dc.date.accessioned2016-06-06T02:12:29Z
dc.date.available2016-06-06T02:12:29Z
dc.identifier.issn0003-6935
dc.identifier.urihttp://hdl.handle.net/1885/102006
dc.description.abstractCoherent combination of multiple lasers using an optical phased array (OPA) is an effective way to scale optical intensity in the far field beyond the capabilities of single fiber lasers. Using an actively phase locked, internally sensed, 2D OPA we demonstrate over 95% fringe visibility of the interfered beam, 𝜆/120 RMS output phase stability over a 5 Hz bandwidth, and quadratic scaling of intensity in the far field using three emitters. This paper presents a new internally sensed OPA architecture that employs a modified version of digitally enhanced heterodyne interferometry (DEHI) based on code division multiplexing to measure and control the phase of each emitter. This internally sensed architecture can be implemented with no freespace components, offering improved robustness to shock and vibration exhibited by all-fiber devices. To demonstrate the concept, a single laser is split into three channels/emitters, each independently controlled using separate electro-optic modulators. The output phase of each channel is measured using DEHI to sense the small fraction of light that is reflected back into the fiber at the OPA’s glass-air interface. The relative phase between emitters is used to derive the control signals needed to stabilize their relative path lengths and maintain coherent combination in the far field.
dc.publisherOptical Society of America
dc.rights© 2014 Optical Society of America
dc.sourceApplied Optics
dc.titleCoherent beam combining using a 2D internally sensed optical phased array
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume53
dc.date.issued2014
local.identifier.absfor020100
local.identifier.absfor020699
local.identifier.absfor090606
local.identifier.ariespublicationU3488905xPUB4394
local.publisher.urlhttp://www.osa.org/en-us/home/
local.type.statusPublished Version
local.contributor.affiliationRoberts, Lyle, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationWard, Robert, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
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.affiliationFleddermann, Roland, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationde Vine, Glenn, California Institute of Technology, United States of America
local.contributor.affiliationMalikides, Emmanuel, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationWuchenich, Danielle, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
local.contributor.affiliationMcClelland, David, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Quantum Science, The Australian National University
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.bibliographicCitation.issue22
local.bibliographicCitation.startpage4881
local.bibliographicCitation.lastpage4885
local.identifier.doi10.1364/AO.53.004881
dc.date.updated2016-06-14T08:44:48Z
local.identifier.scopusID2-s2.0-84942371904
local.identifier.thomsonID000340824800022
CollectionsANU Research Publications

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