Photonic chip based tunable slow and fast light via stimulated Brillouin scattering

Ravi Pant*, Adam Byrnes, Christopher G. Poulton, Enbang Li, Duk Yong Choi, Steve Madden, Barry Luther-Davies, Benjamin J. Eggleton

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    The ability to control the speed of light on an optical chip is fundamental to the development of nanophotonic components for alloptical signal processing and sensing [1-7]. However this is a significant challenge, because chip-scale waveguides require very large changes in group index (Δn g) to achieve appreciable pulse delays. Here, we use Stimulated Brillouin Scattering (SBS) to report the demonstration of on-chip slow, fast and negative group velocities with Δn g ranging from -44 to +130, and delays of up to 23ns at a pump power of ∼300mW and propagation length of 7cm. These results are obtained using a highly-nonlinear chalocogenide (As 2S 3) rib waveguide, in which the confinement of both photons and phonons results in strong interaction. SBS can be used to achieve controllable pulse delays at room temperature over a large wavelength and signal-bandwidth [5]. These results open up a new set of photonic applications ranging from microwave photonics [8] to spectrometry [4].

    Original languageEnglish
    Title of host publicationNonlinear Optics and Applications VI
    DOIs
    Publication statusPublished - 2012
    EventNonlinear Optics and Applications VI - Brussels, Belgium
    Duration: 16 Apr 201218 Apr 2012

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume8434
    ISSN (Print)0277-786X

    Conference

    ConferenceNonlinear Optics and Applications VI
    Country/TerritoryBelgium
    CityBrussels
    Period16/04/1218/04/12

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