Fully-integrated and broadband Si-rich silicon nitride wavelength converter based on Bragg scattering intermodal four-wave mixing

Vitali, V., Domínguez Bucio, T., Liu, H., Luque-González, J., Jurado-Romero, F., Ortega-Moñux, A., Churchill, G., Gates, J., Hillier, J., Kalfagiannis, N. ORCID: 0000-0002-4030-5525, Melati, D., Schmid, J., Cristiani, I., Cheben, P., Wangüemert-Pérez, J.G., Molina-Fernández, I., Gardes, F., Lacava, C. and Petropoulos, P., 2023. Fully-integrated and broadband Si-rich silicon nitride wavelength converter based on Bragg scattering intermodal four-wave mixing. Photonics Research. ISSN 2327-9125

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Abstract

Intermodal four-wave mixing (FWM) processes have recently attracted significant interest for all-optical signal processing applications thanks to the possibility to control the propagation properties of waves exciting distinct spatial modes of the same waveguide. This allows, in principle, to place signals in different spectral regions and satisfy the phase matching condition over considerably larger bandwidths compared to intramodal processes. However, the demonstrations reported so far have shown a limited bandwidth and suffered from the lack of on-chip components designed for broadband manipulation of different modes. We demonstrate here a silicon-rich silicon nitride wavelength converter based on Bragg scattering intermodal FWM, which integrates mode conversion, multiplexing and de-multiplexing functionalities on-chip. The system enables wavelength conversion between pump waves and a signal located in different telecommunication bands (separated by 60 nm) with a 3dB bandwidth exceeding 70 nm, which represents the widest bandwidth ever achieved in an intermodal FWM-based system.

Item Type:	Journal article
Publication Title:	Photonics Research
Creators:	Vitali, V., Domínguez Bucio, T., Liu, H., Luque-González, J., Jurado-Romero, F., Ortega-Moñux, A., Churchill, G., Gates, J., Hillier, J., Kalfagiannis, N., Melati, D., Schmid, J., Cristiani, I., Cheben, P., Wangüemert-Pérez, J.G., Molina-Fernández, I., Gardes, F., Lacava, C. and Petropoulos, P.
Publisher:	Optica Publishing Group
Date:	21 November 2023
ISSN:	2327-9125
Identifiers:	Number Type 10.1364/prj.506691 DOI 1856293 Other
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	31 Jan 2024 14:53
Last Modified:	06 Feb 2024 13:14
URI:	https://irep.ntu.ac.uk/id/eprint/50777

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