Robust Light Coupling in a Quadratically Bent Directional Coupler

Research output: Contribution to journalArticlepeer-review


Bending the axis of an optical directional coupler can result in phase mismatch between the evanescently coupled waveguides. Using a quadratic bending profile, we realize the phase mismatch with a sign flip scheme for robust light coupling between the waveguides. We derive an analytical solution for the coupling scheme and show its robustness against parameter variations. Beam propagation method solution of the scalar wave equation verifies the two-level analysis and the device robustness.

Original languageEnglish
Article number9367204
Pages (from-to)343-346
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number7
Publication statusPublished - 2021 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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