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Coupling of planar waveguides with hyperbolic secant refractive-index profiles by butt joining: beam-size controller
Optics Letters
|October 31, 2009
Summary
This study analyzes optical waveguide coupling using geometrical optics. A new device is designed to contract or expand light beams, establishing a relationship between input and output beam sizes.
Area of Science:
- Optics and Photonics
- Waveguide Theory
- Geometrical Optics
Background:
- Investigates butt-joining coupling in inhomogeneous planar optical waveguides.
- Focuses on waveguides with hyperbolic secant refractive-index profiles.
- Applies geometrical optics principles for analysis.
Purpose of the Study:
- To analyze butt-joining coupling between inhomogeneous planar optical waveguides.
- To design a novel device for contracting or expanding collimated beams.
- To derive a relationship between input and output beam sizes for the designed device.
Main Methods:
- Utilizes geometrical optics for analyzing waveguide coupling.
- Presents the design methodology for a beam contracting/expanding device.
- Derives analytical expressions for beam size relationships.
Main Results:
- Provides an analysis of butt-joining coupling in specified optical waveguides.
- Successfully designs a device capable of altering collimated beam dimensions.
- Establishes a clear mathematical relationship between input and output beam sizes.
Conclusions:
- Geometrical optics offers a viable approach for analyzing optical waveguide coupling.
- The proposed device effectively controls collimated beam sizes.
- The derived relationship is crucial for optical system design and optimization.
