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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 21235–21246

Design for broadband on-chip isolator using stimulated Brillouin scattering in dispersion-engineered chalcogenide waveguides

Christopher G. Poulton, Ravi Pant, Adam Byrnes, Shanhui Fan, M. J. Steel, and Benjamin J. Eggleton  »View Author Affiliations


Optics Express, Vol. 20, Issue 19, pp. 21235-21246 (2012)
http://dx.doi.org/10.1364/OE.20.021235


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Abstract

We propose a scheme for on-chip isolation in chalcogenide (As2S3) rib waveguides, in which Stimulated Brillouin Scattering is used to induce non-reciprocal mode conversion within a multi-moded waveguide. The design exploits the idea that a chalcogenide rib buried in a silica matrix acts as waveguide for both light and sound, and can also be designed to be multi-moded for both optical and acoustic waves. The enhanced opto-acoustic coupling allows significant isolation (> 20 dB) within a chip-scale (cm-long) device (< 10 cm). We also show that the bandwidth of this device can be dramatically increased by tuning the dispersion of the waveguide to match the group velocity between optical modes: we find that 20 dB isolation can be extended over a bandwidth of 25 nm.

© 2012 OSA

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(190.4360) Nonlinear optics : Nonlinear optics, devices

ToC Category:
Nonlinear Optics

History
Original Manuscript: July 20, 2012
Revised Manuscript: August 21, 2012
Manuscript Accepted: August 21, 2012
Published: August 31, 2012

Citation
Christopher G. Poulton, Ravi Pant, Adam Byrnes, Shanhui Fan, M. J. Steel, and Benjamin J. Eggleton, "Design for broadband on-chip isolator using stimulated Brillouin scattering in dispersion-engineered chalcogenide waveguides," Opt. Express 20, 21235-21246 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-19-21235


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