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Intermodal frequency generation in silicon-rich silicon nitride waveguides

Intermodal frequency generation in silicon-rich silicon nitride waveguides
Intermodal frequency generation in silicon-rich silicon nitride waveguides
Dispersion engineering in optical waveguides allows applications relying on the precise control of phase matching conditions to be implemented. Although extremely effective over relatively narrow band spectral regions, dispersion control becomes increasingly challenging as the bandwidth of the process of interest increases. Phase matching can also be achieved by exploiting the propagation characteristics of waves exciting different spatial modes of the same waveguide. Phase matching control in this case relies on achieving very similar propagation characteristics across two, and even more, waveguide modes over the wavelengths of interest, which may be rather far from one another. We demonstrate here that broadband (>40  nm) four-wave mixing can be achieved between pump waves and a signal located in different bands of the communications spectrum (separated by 50 nm) by exploiting interband nonlinearities. Our demonstration is carried out in the silicon-rich silicon nitride material platform, which allows flexible device engineering, allowing for strong effective nonlinearity at telecommunications wavelengths without deleterious nonlinear-loss effects.
615-621
Lacava, Cosimo
a0a31a27-23ac-4a73-8bb4-2f02368fb8bd
Domínguez Bucio, Thalia
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Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Horak, Peter
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Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Gardes, Frederic
7a49fc6d-dade-4099-b016-c60737cb5bb2
Richardson, David
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Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Parmigiani, Francesca
6a386833-5186-4448-875e-d691161aba62
Lacava, Cosimo
a0a31a27-23ac-4a73-8bb4-2f02368fb8bd
Domínguez Bucio, Thalia
83b57799-c566-473c-9b53-92e9c50b4287
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Jung, Yongmin
6685e51e-be47-4c96-8c4b-65aee3b5126d
Gardes, Frederic
7a49fc6d-dade-4099-b016-c60737cb5bb2
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Parmigiani, Francesca
6a386833-5186-4448-875e-d691161aba62

Lacava, Cosimo, Domínguez Bucio, Thalia, Khokhar, Ali, Horak, Peter, Jung, Yongmin, Gardes, Frederic, Richardson, David, Petropoulos, Periklis and Parmigiani, Francesca (2019) Intermodal frequency generation in silicon-rich silicon nitride waveguides. Photonics Research, 7 (6), 615-621. (doi:10.1364/PRJ.7.000615).

Record type: Article

Abstract

Dispersion engineering in optical waveguides allows applications relying on the precise control of phase matching conditions to be implemented. Although extremely effective over relatively narrow band spectral regions, dispersion control becomes increasingly challenging as the bandwidth of the process of interest increases. Phase matching can also be achieved by exploiting the propagation characteristics of waves exciting different spatial modes of the same waveguide. Phase matching control in this case relies on achieving very similar propagation characteristics across two, and even more, waveguide modes over the wavelengths of interest, which may be rather far from one another. We demonstrate here that broadband (>40  nm) four-wave mixing can be achieved between pump waves and a signal located in different bands of the communications spectrum (separated by 50 nm) by exploiting interband nonlinearities. Our demonstration is carried out in the silicon-rich silicon nitride material platform, which allows flexible device engineering, allowing for strong effective nonlinearity at telecommunications wavelengths without deleterious nonlinear-loss effects.

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Submitted date: 1 February 2019
Accepted/In Press date: 27 March 2019
Published date: 3 May 2019

Identifiers

Local EPrints ID: 430727
URI: https://eprints.soton.ac.uk/id/eprint/430727
PURE UUID: 06d169e5-9373-4407-bf32-4e2f250fcf32
ORCID for Cosimo Lacava: ORCID iD orcid.org/0000-0002-9950-8642
ORCID for Thalia Domínguez Bucio: ORCID iD orcid.org/0000-0002-3664-1403
ORCID for Peter Horak: ORCID iD orcid.org/0000-0002-8710-8764
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Periklis Petropoulos: ORCID iD orcid.org/0000-0002-1576-8034
ORCID for Francesca Parmigiani: ORCID iD orcid.org/0000-0001-7784-2829

Catalogue record

Date deposited: 09 May 2019 16:30
Last modified: 19 Jun 2019 00:39

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