Direct characterization of a nonlinear photonic circuit's wave function with laser light

Lenzini, F; Poddubny, AN; Titchener, J; Fisher, P; Boes, A; Kasture, S; Haylock, B; Villa, M; Mitchell, A; Solntsev, AS; Sukhorukov, AA; Lobino, M

Direct characterization of a nonlinear photonic circuit's wave function with laser light

Lenzini, F Poddubny, AN Titchener, J Fisher, P Boes, A Kasture, S Haylock, B Villa, M Mitchell, A Solntsev, AS

Sukhorukov, AA Lobino, M

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Publication Type:: Journal Article
Citation:: Light: Science and Applications, 2018, 7 (1)
Issue Date:: 2018-01-12

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Field	Value	Language
dc.contributor.author	Lenzini, F	en_US
dc.contributor.author	Poddubny, AN	en_US
dc.contributor.author	Titchener, J	en_US
dc.contributor.author	Fisher, P	en_US
dc.contributor.author	Boes, A	en_US
dc.contributor.author	Kasture, S	en_US
dc.contributor.author	Haylock, B	en_US
dc.contributor.author	Villa, M	en_US
dc.contributor.author	Mitchell, A	en_US
dc.contributor.author	Solntsev, AS https://orcid.org/0000-0003-4981-9730	en_US
dc.contributor.author	Sukhorukov, AA	en_US
dc.contributor.author	Lobino, M	en_US
dc.date.available	2017-10-15	en_US
dc.date.issued	2018-01-12	en_US
dc.identifier.citation	Light: Science and Applications, 2018, 7 (1)	en_US
dc.identifier.issn	2095-5545	en_US
dc.identifier.uri	http://hdl.handle.net/10453/128628
dc.description.abstract	© The Author(s) 2018. Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4, demonstration of quantum computational complexity 5 and secure quantum communications 6. As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10. We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP160100619
dc.relation.ispartof	Light: Science and Applications	en_US
dc.relation.isbasedon	10.1038/lsa.2017.143	en_US
dc.title	Direct characterization of a nonlinear photonic circuit's wave function with laser light	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	7	en_US
utslib.for	0205 Optical Physics	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	7	en_US

Abstract:

© The Author(s) 2018. Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4, demonstration of quantum computational complexity 5 and secure quantum communications 6. As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10. We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.

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http://hdl.handle.net/10453/128628