1  ×  5 broadband photonic crystal power splitter designed by the Powell algorithm

Area of Science:

• Photonics and Optical Engineering
• Materials Science

Background:

• Broadband power splitters are essential components in optical communication systems.
• Existing designs often face limitations in bandwidth, splitting ratio flexibility, and size.

Purpose of the Study:

• To propose and design a novel 1x5 broadband power splitter utilizing photonic crystal technology.
• To achieve a flexible and designable power splitting ratio with excellent performance and a compact footprint.

Main Methods:

• A photonic crystal structure was employed for the power splitter design.
• The Powell algorithm was utilized for the reverse design and optimization of structural parameters.
• Transmittance was adjusted by modifying dielectric rod radii and offsets at waveguide junctions.

Main Results:

• The designed photonic crystal power splitter exhibits a wide working bandwidth from 1525-1565 nm.
• The device allows for adjustable transmittance at each output port, enabling a flexible splitting ratio.
• The Powell algorithm significantly enhanced optimization efficiency and splitting performance.

Conclusions:

• The proposed photonic crystal power splitter demonstrates excellent performance, wide bandwidth, and a designable splitting ratio.
• Its compact size and capabilities make it highly suitable for all-optical communication networks and high-density photonic integration.