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

Charlambos Klitis, Marc Sorel, Michael J. Strain

Research output: Contribution to journalArticle

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.
LanguageEnglish
Article number569
Number of pages12
JournalMicromachines
Volume10
Issue number9
DOIs
Publication statusPublished - 28 Aug 2019

Fingerprint

Bragg gratings
Group delay
Silicon
Dispersion compensation
Photonic devices
Thermal gradients
Telecommunication
Optics
Refractive index
Bandwidth

Keywords

  • silicon photonics
  • dispersion control
  • Bragg gratings

Cite this

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Active on-chip dispersion control using a tunable silicon Bragg grating. / Klitis, Charlambos ; Sorel, Marc; Strain, Michael J.

In: Micromachines, Vol. 10, No. 9, 569, 28.08.2019.

Research output: Contribution to journalArticle

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AU - Sorel, Marc

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KW - dispersion control

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