Work

Adjustable coupling-coefficient waveguide Bragg grating with doubly periodic structures

Year: 2025

Type: article

Abstract: Waveguide Bragg gratings serve as essential components in both passive and active photonic integrated circuits. It is essential to achieve a desired coupling coefficient; however, the available methodologies are currently constrained. Here, we show that the doubly periodic sidewall waveguide Bragg gratings, consisting of the m th-order Bragg grating on one side of the waveguide and the 2m th-order Bragg grating on the other, can significantly adjust the coupling coefficient. We also comprehensively study the grating strength control by varying the offset between the corrugations in sidewalls. Finally, we experimentally demonstrate AlN doubly periodic waveguide Bragg gratings with the 1st -order grating on one side and the 2nd -order grating on the other. The measured results are in very good agreement with simulations.

Source: Optics Express

DOI: 10.1364/oe.572052

Authors: Haocheng Huang, Yujun Guo, Tianyu Sun

Institution: Changchun University of Science and Technology

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funder: National Key Research and Development Program of China