Related Experiment Video
Updated: Jun 22, 2026
13:02
Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
Nonuniform photonic crystal taper for high-efficiency mode coupling.
Optics Express
|June 6, 2009
Summary
This study presents a novel photonic crystal taper for efficient optical fiber coupling. Convex-shaped tapers achieve over 97% coupling efficiency, optimizing device performance.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Efficient mode coupling between optical fibers and photonic crystal waveguides is crucial for integrated photonic devices.
- Nonuniform-shape tapers offer potential for improved coupling performance compared to traditional designs.
Purpose of the Study:
- To design and analyze a nonuniform-shape photonic crystal taper for high-efficiency mode coupling.
- To investigate the impact of taper curvature, controlled by the parameter alpha, on coupling efficiency and device compactness.
Main Methods:
- Integration of a photonic crystal taper with a single-mode optical fiber and a photonic crystal waveguide.
- Numerical calculations to determine coupling efficiency for varying taper shapes (concave and convex).
- Systematic variation of the curvature parameter (alpha) to study its effects.
Main Results:
- Achieved average coupling efficiency greater than 97% for a convex-shape taper.
- Demonstrated high efficiency at a short taper length of 20.52 micrometers.
- Identified the significant influence of taper curvature on both coupling efficiency and compactness.
Conclusions:
- The developed nonuniform-shape photonic crystal taper enables highly efficient mode coupling.
- Convex-shape tapers with specific curvature parameters offer superior performance.
- This approach provides a promising pathway for compact and efficient photonic integrated devices.
