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GaAs directional coupler devices: design considerations.

S I Najafi, M Belanger

|June 5, 2010

Summary

This summary is machine-generated.

Asymmetrical directional couplers in gallium arsenide (GaAs) offer efficient wavelength filtering and switching. They require less coupling length and index change compared to symmetrical designs for optimal light switching.

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Area of Science:

Optoelectronics
Semiconductor devices
Integrated optics

Background:

Directional couplers are fundamental components in integrated optics.
Gallium arsenide (GaAs) is a key material for optoelectronic devices.
Understanding coupler performance is crucial for optical switching and filtering applications.

Purpose of the Study:

To analyze symmetrical and asymmetrical directional couplers in GaAs.
To evaluate their performance as wavelength filters and switches.
To compare the switching requirements of symmetrical versus asymmetrical designs.

Main Methods:

Theoretical analysis of directional coupler structures.
Modeling of light propagation in GaAs waveguides.
Simulation of coupler performance under varying parameters.

Main Results:

Asymmetrical couplers demonstrate efficient performance as wavelength filters and switches.
Switching of light between waveguides is achieved more effectively in asymmetrical designs.
Shorter coupling lengths and reduced index changes are needed for switching in asymmetrical couplers.

Conclusions:

Asymmetrical directional couplers in GaAs are superior for optical switching and filtering.
Design optimization can lead to more compact and efficient photonic devices.
These findings advance the development of integrated optical systems.