Robust Light Coupling in a Quadratically Bent Directional Coupler

Shuo Yen Tseng

doi:10.1109/LPT.2021.3063486

Robust Light Coupling in a Quadratically Bent Directional Coupler

Shuo Yen Tseng

Department of Photonics

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

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 language	English
Article number	9367204
Pages (from-to)	343-346
Number of pages	4
Journal	IEEE Photonics Technology Letters
Volume	33
Issue number	7
DOIs	https://doi.org/10.1109/LPT.2021.3063486
Publication status	Published - 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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10.1109/LPT.2021.3063486

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abstract = "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.",

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note = "Funding Information: Manuscript received December 7, 2020; revised January 15, 2021; accepted February 28, 2021. Date of publication March 2, 2021; date of current version March 9, 2021. This work was supported by the Ministry of Science and Technology, Taiwan under Grant 108-2221-E-006-204-MY3 and Grant 109-2224-E-992-001. Publisher Copyright: {\textcopyright} 1989-2012 IEEE.",

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N2 - 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.

AB - 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.

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Robust Light Coupling in a Quadratically Bent Directional Coupler

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