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Contradirectional frequency-selective couplers for guided-wave optics.

P Yeh, H F Taylor

|March 18, 2010

Summary

This summary is machine-generated.

Researchers analyzed frequency-selective optical couplers using periodic refractive index changes. Varying perturbation amplitude significantly reduces sidelobes for improved performance in optical communication.

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Area of Science:

Photonics
Optical Engineering
Waveguide Devices

Background:

Optical couplers are essential for managing light in integrated photonic circuits.
Frequency-selective couplers utilize periodic structures for controlled light manipulation.
Existing designs with uniform perturbations suffer from undesirable sidelobes.

Purpose of the Study:

To analyze frequency-selective optical couplers with periodic refractive index perturbations.
To investigate methods for reducing sidelobes in contradirectional couplers.
To determine design parameters for high-performance optical couplers.

Main Methods:

Solving coupled-mode equations to derive spectral response expressions.
Analyzing power transfer in parallel single-mode waveguides.
Calculating mode propagation constants and coupling parameters for corrugated waveguides.

Main Results:

Demonstrated that varying perturbation amplitude reduces sidelobes compared to uniform perturbations.
Determined design parameters for optical couplers with high transfer efficiency.
Achieved low crosstalk and low reflection efficiency in the primary waveguide.

Conclusions:

Non-uniform periodic perturbations offer superior control over coupler spectral response.
The study provides a framework for designing advanced frequency-selective optical couplers.
Optimized coupler designs are crucial for next-generation optical communication systems.