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Updated: Jun 14, 2026
11:08
Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Coupling characteristics measurements between curved waveguides using a two-core fiber coupler.
Applied Optics
|March 24, 2010
Summary
The study demonstrates that the curvature of optical waveguides significantly impacts light coupling efficiency. Adjusting the radius of curvature allows control over light transfer between waveguide cores, with coupling ceasing when curvature-induced phase shifts dominate.
Area of Science:
- Optics and Photonics
- Waveguide Theory
Background:
- Waveguide coupling is crucial for optical devices.
- Understanding coupling in curved waveguides is essential for advanced photonic integrated circuits.
Purpose of the Study:
- To investigate the coupling characteristics of two curved waveguides.
- To determine the wavelength dependence of coupling efficiency in curved fiber optics.
Main Methods:
- Utilized a two-core fiber setup.
- Employed a tunable monochromatic light source for measurements.
- Compared experimental coupling efficiency data with theoretical predictions.
Main Results:
- Experimental results closely matched theoretical models.
- Achieved tunable coupling efficiency (0 to 1) by altering the radius of curvature.
- Identified a critical condition where curvature-induced phase shift (s*beta/(2*R)) prevents core coupling.
Conclusions:
- The radius of curvature is a key parameter for controlling light coupling in waveguides.
- Curvature-induced phase shifts can effectively suppress waveguide coupling.
- Findings provide insights for designing advanced optical couplers and devices.
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