Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler

W. Ding, O. Staines, G.D. Hobbs, A.V. Gorbach, C.E. De Nobriga, W.J. Wadsworth, J.C. Knight, D.V. Skryabin, M. Strain, M. Sorel, R.M. De La Rue

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Four-wave mixing (FWM) has been extensively explored in optical fibers and more recently in on-chip silicon-oninsulator (SOI) waveguides. A phase-matched FWM with a pair of degenerate pump photons generating and amplifying signal and idler photons is referred as modulational instability (MI). Following theory of FWM in waveguide arrays, we utilize evanescent couplings between neighboring waveguides to control the phase-matching condition in FWM. In experiments, a set of single-channel SOI nanowaveguides with the waveguide width decreasing from 380nm to 340nm demonstrate that changing the waveguide group velocity dispersion (GVD) at the pump wavelength from being anomalous to being normal makes MI gain gradually disappear. We also perform the same experiment with an array of two 380nm-wide SOI waveguide, and demonstrate that for the large separation of 900nm and 800nm, MI gain is present as for the single waveguide; while for the small separation of 400nm, the MI gain disappears. This transformation of phase-matching in FWM is attributed to the fact that the coupling induced dispersion changes the net GVD of the symmetric supermode from being anomalous for large separation to being normal for small separation. Our observation illustrates that the coupling-induced GVD can compete and exceed in value the GVD of a single SOI nanowaveguide. This creates a new previously unexplored degree of freedom to control FWM on chips.
Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Subtitle of host publicationQuantum and nonlinear Optics II
EditorsQ Gong, G-C Guo, Y-R Shen
PublisherSPIE
ISBN (Print)9780819493095
DOIs
Publication statusPublished - 2012
EventQuantum and Nonlinear Optics II - Beijing, China
Duration: 5 Nov 20127 Nov 2012

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume8554

Conference

ConferenceQuantum and Nonlinear Optics II
CountryChina
CityBeijing
Period5/11/127/11/12

Fingerprint

directional couplers
four-wave mixing
waveguides
group velocity
silicon
phase matching
chips
pumps
photons
degrees of freedom
optical fibers
wavelengths

Cite this

Ding, W., Staines, O., Hobbs, G. D., Gorbach, A. V., De Nobriga, C. E., Wadsworth, W. J., ... De La Rue, R. M. (2012). Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler. In Q. Gong, G-C. Guo, & Y-R. Shen (Eds.), Proceedings of SPIE - The International Society for Optical Engineering: Quantum and nonlinear Optics II (SPIE Proceedings; Vol. 8554). SPIE. https://doi.org/10.1117/12.2000638

Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler. / Ding, W.; Staines, O.; Hobbs, G.D.; Gorbach, A.V.; De Nobriga, C.E.; Wadsworth, W.J.; Knight, J.C.; Skryabin, D.V.; Strain, M.; Sorel, M.; De La Rue, R.M.

Proceedings of SPIE - The International Society for Optical Engineering: Quantum and nonlinear Optics II. ed. / Q Gong; G-C Guo; Y-R Shen. SPIE, 2012. (SPIE Proceedings; Vol. 8554).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ding, W, Staines, O, Hobbs, GD, Gorbach, AV, De Nobriga, CE, Wadsworth, WJ, Knight, JC, Skryabin, DV, Strain, M, Sorel, M & De La Rue, RM 2012, Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler. in Q Gong, G-C Guo & Y-R Shen (eds), Proceedings of SPIE - The International Society for Optical Engineering: Quantum and nonlinear Optics II. SPIE Proceedings, vol. 8554, SPIE, Quantum and Nonlinear Optics II, Beijing, China, 5/11/12. https://doi.org/10.1117/12.2000638
Ding W, Staines O, Hobbs GD, Gorbach AV, De Nobriga CE, Wadsworth WJ et al. Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler. In Gong Q, Guo G-C, Shen Y-R, editors, Proceedings of SPIE - The International Society for Optical Engineering: Quantum and nonlinear Optics II. SPIE. 2012. (SPIE Proceedings). https://doi.org/10.1117/12.2000638
Ding, W. ; Staines, O. ; Hobbs, G.D. ; Gorbach, A.V. ; De Nobriga, C.E. ; Wadsworth, W.J. ; Knight, J.C. ; Skryabin, D.V. ; Strain, M. ; Sorel, M. ; De La Rue, R.M. / Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler. Proceedings of SPIE - The International Society for Optical Engineering: Quantum and nonlinear Optics II. editor / Q Gong ; G-C Guo ; Y-R Shen. SPIE, 2012. (SPIE Proceedings).
@inproceedings{fd518061b9d0414ebd18b665a45f07b1,
title = "Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler",
abstract = "Four-wave mixing (FWM) has been extensively explored in optical fibers and more recently in on-chip silicon-oninsulator (SOI) waveguides. A phase-matched FWM with a pair of degenerate pump photons generating and amplifying signal and idler photons is referred as modulational instability (MI). Following theory of FWM in waveguide arrays, we utilize evanescent couplings between neighboring waveguides to control the phase-matching condition in FWM. In experiments, a set of single-channel SOI nanowaveguides with the waveguide width decreasing from 380nm to 340nm demonstrate that changing the waveguide group velocity dispersion (GVD) at the pump wavelength from being anomalous to being normal makes MI gain gradually disappear. We also perform the same experiment with an array of two 380nm-wide SOI waveguide, and demonstrate that for the large separation of 900nm and 800nm, MI gain is present as for the single waveguide; while for the small separation of 400nm, the MI gain disappears. This transformation of phase-matching in FWM is attributed to the fact that the coupling induced dispersion changes the net GVD of the symmetric supermode from being anomalous for large separation to being normal for small separation. Our observation illustrates that the coupling-induced GVD can compete and exceed in value the GVD of a single SOI nanowaveguide. This creates a new previously unexplored degree of freedom to control FWM on chips.",
author = "W. Ding and O. Staines and G.D. Hobbs and A.V. Gorbach and {De Nobriga}, C.E. and W.J. Wadsworth and J.C. Knight and D.V. Skryabin and M. Strain and M. Sorel and {De La Rue}, R.M.",
note = "Article number 855411",
year = "2012",
doi = "10.1117/12.2000638",
language = "English",
isbn = "9780819493095",
series = "SPIE Proceedings",
publisher = "SPIE",
editor = "Gong, {Q } and G-C Guo and Shen, {Y-R }",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",
address = "USA United States",

}

TY - GEN

T1 - Evanescent coupling assisted four-wave mixing in a silicon-oninsulator directional coupler

AU - Ding, W.

AU - Staines, O.

AU - Hobbs, G.D.

AU - Gorbach, A.V.

AU - De Nobriga, C.E.

AU - Wadsworth, W.J.

AU - Knight, J.C.

AU - Skryabin, D.V.

AU - Strain, M.

AU - Sorel, M.

AU - De La Rue, R.M.

N1 - Article number 855411

PY - 2012

Y1 - 2012

N2 - Four-wave mixing (FWM) has been extensively explored in optical fibers and more recently in on-chip silicon-oninsulator (SOI) waveguides. A phase-matched FWM with a pair of degenerate pump photons generating and amplifying signal and idler photons is referred as modulational instability (MI). Following theory of FWM in waveguide arrays, we utilize evanescent couplings between neighboring waveguides to control the phase-matching condition in FWM. In experiments, a set of single-channel SOI nanowaveguides with the waveguide width decreasing from 380nm to 340nm demonstrate that changing the waveguide group velocity dispersion (GVD) at the pump wavelength from being anomalous to being normal makes MI gain gradually disappear. We also perform the same experiment with an array of two 380nm-wide SOI waveguide, and demonstrate that for the large separation of 900nm and 800nm, MI gain is present as for the single waveguide; while for the small separation of 400nm, the MI gain disappears. This transformation of phase-matching in FWM is attributed to the fact that the coupling induced dispersion changes the net GVD of the symmetric supermode from being anomalous for large separation to being normal for small separation. Our observation illustrates that the coupling-induced GVD can compete and exceed in value the GVD of a single SOI nanowaveguide. This creates a new previously unexplored degree of freedom to control FWM on chips.

AB - Four-wave mixing (FWM) has been extensively explored in optical fibers and more recently in on-chip silicon-oninsulator (SOI) waveguides. A phase-matched FWM with a pair of degenerate pump photons generating and amplifying signal and idler photons is referred as modulational instability (MI). Following theory of FWM in waveguide arrays, we utilize evanescent couplings between neighboring waveguides to control the phase-matching condition in FWM. In experiments, a set of single-channel SOI nanowaveguides with the waveguide width decreasing from 380nm to 340nm demonstrate that changing the waveguide group velocity dispersion (GVD) at the pump wavelength from being anomalous to being normal makes MI gain gradually disappear. We also perform the same experiment with an array of two 380nm-wide SOI waveguide, and demonstrate that for the large separation of 900nm and 800nm, MI gain is present as for the single waveguide; while for the small separation of 400nm, the MI gain disappears. This transformation of phase-matching in FWM is attributed to the fact that the coupling induced dispersion changes the net GVD of the symmetric supermode from being anomalous for large separation to being normal for small separation. Our observation illustrates that the coupling-induced GVD can compete and exceed in value the GVD of a single SOI nanowaveguide. This creates a new previously unexplored degree of freedom to control FWM on chips.

UR - http://www.scopus.com/inward/record.url?scp=84880126276&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1117/12.2000638

U2 - 10.1117/12.2000638

DO - 10.1117/12.2000638

M3 - Conference contribution

SN - 9780819493095

T3 - SPIE Proceedings

BT - Proceedings of SPIE - The International Society for Optical Engineering

A2 - Gong, Q

A2 - Guo, G-C

A2 - Shen, Y-R

PB - SPIE

ER -