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Teaching a laser beam to go straight

Bachor, Hans; Fabre, Claude; Lam, Ping Koy; Treps, Nicolas

Description

In classical physics a beam of light propagates in a perfectly straight line and this means that we can measure small displacements with unlimited accuracy. However, this is not correct for real laser beams when we take the quantum properties of light into account. Spatial measurements will be limited by quantum noise, similar to the limitations for optical communication and sensing. Here we derive the spatial quantum noise limit and show how to measure it. Next we demonstrate that we can use...[Show more]

dc.contributor.authorBachor, Hans
dc.contributor.authorFabre, Claude
dc.contributor.authorLam, Ping Koy
dc.contributor.authorTreps, Nicolas
dc.date.accessioned2015-12-13T22:49:31Z
dc.identifier.issn0010-7514
dc.identifier.urihttp://hdl.handle.net/1885/80578
dc.description.abstractIn classical physics a beam of light propagates in a perfectly straight line and this means that we can measure small displacements with unlimited accuracy. However, this is not correct for real laser beams when we take the quantum properties of light into account. Spatial measurements will be limited by quantum noise, similar to the limitations for optical communication and sensing. Here we derive the spatial quantum noise limit and show how to measure it. Next we demonstrate that we can use specially prepared light with quantum correlations, so-called squeezed light, to improve spatial measurements to below this quantum limit. In this way we prepare a beam which goes in a straighter line than the output of any conventional laser.
dc.publisherTaylor & Francis Group
dc.sourceContemporary Physics
dc.titleTeaching a laser beam to go straight
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume46
dc.date.issued2005
local.identifier.absfor020604 - Quantum Optics
local.identifier.ariespublicationMigratedxPub8836
local.type.statusPublished Version
local.contributor.affiliationBachor, Hans, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationFabre, Claude, Universite Pierre et Marie Curie
local.contributor.affiliationLam, Ping Koy, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationTreps, Nicolas, Universite Pierre et Marie Curie
local.description.embargo2037-12-31
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage395
local.bibliographicCitation.lastpage405
local.identifier.doi10.1080/00107510500165089
dc.date.updated2015-12-11T10:35:55Z
local.identifier.scopusID2-s2.0-29244443450
CollectionsANU Research Publications

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