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Parametric up- and down-conversion in sub-wavelength waveguides: coherent sources in the UV and IR

Parametric up- and down-conversion in sub-wavelength waveguides: coherent sources in the UV and IR
Parametric up- and down-conversion in sub-wavelength waveguides: coherent sources in the UV and IR
Parametric up- and down-conversion require phase matching between the generating and generated wavelengths, introducing strict requirements on the refractive index dispersion of materials used for this nonlinear processes. Optical microfibers can exploit the different modal overlap with core and cladding materials to phase match different modes at the required wavelengths. Intermodal phase-matching has been successfully exploited in optical microfibres to generate second- and third-harmonics, both in straight waveguides and related resonators. The simultaneous generation of guided higher harmonics also allowed to exploit other nonlinear effects like four wave mixing to generate light at short wavelengths in the UV part of the spectrum. Parametric down-conversion allows to generate entangled photons, but with efficiencies significantly smaller than their up-conversion processes because of their reliance of spontaneous photons generation from vacuum. The use of more complex architectures, based on multiple coupled waveguides, allows to achieve a quasi-phase matching condition, thus a sizeable improvement on the overall conversion efficiency.
Abdul Khudus, M.I.M.
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Lee, Timothy
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Ding, Ming
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Wang, Pengfei
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Ismaeel, Rand
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Huang, Tianye
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Shao, Xuguang
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Wu, Zhifang
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Wu, Tingting
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Sun, Yunxu
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Zhang, Jing
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Lam, Quoc Huy
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Shum, Perry Ping
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Brambilla, Gilberto
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Abdul Khudus, M.I.M.
17127b8f-cde4-4c11-aca0-3c9151a42d94
Lee, Timothy
beb3b88e-3e5a-4c3f-8636-bb6de8040fcc
Ding, Ming
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Wang, Pengfei
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Ismaeel, Rand
c1fb0984-a4c0-484a-8aef-625d48a62086
Huang, Tianye
802c90e3-cb40-4cf2-82f5-ef60d2169bf4
Shao, Xuguang
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Wu, Zhifang
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Wu, Tingting
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Sun, Yunxu
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Zhang, Jing
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Lam, Quoc Huy
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Shum, Perry Ping
5c669130-28f6-4b50-8568-78e05e2ce87d
Brambilla, Gilberto
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Abdul Khudus, M.I.M., Lee, Timothy, Ding, Ming, Wang, Pengfei, Ismaeel, Rand, Huang, Tianye, Shao, Xuguang, Wu, Zhifang, Wu, Tingting, Sun, Yunxu, Zhang, Jing, Lam, Quoc Huy, Shum, Perry Ping and Brambilla, Gilberto (2015) Parametric up- and down-conversion in sub-wavelength waveguides: coherent sources in the UV and IR. Extreme Events in Complex Optical Systems, Argentina. 02 Dec 2015.

Record type: Conference or Workshop Item (Other)

Abstract

Parametric up- and down-conversion require phase matching between the generating and generated wavelengths, introducing strict requirements on the refractive index dispersion of materials used for this nonlinear processes. Optical microfibers can exploit the different modal overlap with core and cladding materials to phase match different modes at the required wavelengths. Intermodal phase-matching has been successfully exploited in optical microfibres to generate second- and third-harmonics, both in straight waveguides and related resonators. The simultaneous generation of guided higher harmonics also allowed to exploit other nonlinear effects like four wave mixing to generate light at short wavelengths in the UV part of the spectrum. Parametric down-conversion allows to generate entangled photons, but with efficiencies significantly smaller than their up-conversion processes because of their reliance of spontaneous photons generation from vacuum. The use of more complex architectures, based on multiple coupled waveguides, allows to achieve a quasi-phase matching condition, thus a sizeable improvement on the overall conversion efficiency.

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Brambilla - Parametric up- and down-conversion in sub-wavelength waveguides - coherent sources in the UV and IR.pdf - Other
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e-pub ahead of print date: 3 December 2015
Venue - Dates: Extreme Events in Complex Optical Systems, Argentina, 2015-12-02 - 2015-12-02
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 385229
URI: https://eprints.soton.ac.uk/id/eprint/385229
PURE UUID: b12531e9-8404-4cf7-b61a-dcfc81dc6710

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Date deposited: 12 Jan 2016 12:02
Last modified: 14 Nov 2018 17:30

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