Active on-chip dispersion control using a tunable silicon Bragg grating

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Klitis, Charlambos and Sorel, Marc and Strain, Michael J. (2019) Active on-chip dispersion control using a tunable silicon Bragg grating. Micromachines, 10 (9). 569. ISSN 2072-666X (https://doi.org/10.3390/mi10090569)

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Abstract

Actively controllable dispersion in on-chip photonic devices is challenging to implement compared with free space optical components where mechanical degrees of freedom can be employed. Here we present a method by which continuously tunable group delay control is achieved by modulating the refractive index profile of a silicon Bragg grating using thermo-optic effects. A simple thermal heater element is used to create tunable thermal gradients along the grating length, inducing chirped group delay profiles. Both effective blue and red chirp are realised using a single on-chip device over nanometre scale bandwidths. Group delay slopes are continuously tunable over a few ps/nm range from red to blue chirp, compatible with on-chip dispersion compensation for telecommunications picosecond pulse systems.

ORCID iDs

Klitis, Charlambos, Sorel, Marc and Strain, Michael J. ORCID logoORCID: https://orcid.org/0000-0002-9752-3144;
  • Item type:Article
    ID code:69555
    Dates:
    Date
    Event
    28 August 2019
    Published
    24 August 2019
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:02 Sep 2019 09:05
    Last modified:11 Nov 2024 12:25
    URI:https://strathprints.strath.ac.uk/id/eprint/69555
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