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Systematic design of microprism-type low-loss step-index bent waveguides
Applied Optics
|February 15, 2008
Summary
We developed novel microprism waveguide bends considering curved light paths, achieving over 95% transmission efficiency for 10-degree bends in 3D structures. This improves optical performance in integrated photonics.
Area of Science:
- Photonics
- Optical Engineering
- Materials Science
Background:
- Conventional waveguide bends often suffer from signal loss due to abrupt path changes.
- Three-dimensional integrated photonic structures require efficient bending solutions for complex layouts.
Purpose of the Study:
- To propose and analyze novel microprism-type waveguide bends for 3D embedded structures.
- To develop precise phase compensation formulas for curved optical paths in waveguide bends.
Main Methods:
- Theoretical derivation of phase compensation formulas for microprism bends.
- Simulation using the fast Fourier-transform beam propagation method (FFT-BPM).
Main Results:
- Proposed two types of microprism-type waveguide bends.
- Achieved normalized transmitted powers exceeding 95% for bends up to 10 degrees.
- Demonstrated the effectiveness of accounting for curved optical paths.
Conclusions:
- Microprism waveguide bends offer a significant improvement in transmission efficiency.
- The proposed method provides accurate phase compensation for efficient light propagation in 3D photonic circuits.
