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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Design of phased-array wavelength division multiplexers using multimode interference couplers.

M R Paiam, R I Macdonald

|July 20, 1997

Summary

This summary is machine-generated.

Novel phased-array wavelength-division multiplexers utilize multimode interference (MMI) couplers for compact, low-loss optical signal processing. These devices enable efficient wavelength channel management and selective interconnectivity in optical systems.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Waveguide Devices

Background:

Multimode interference (MMI) couplers offer excellent power splitting/combining characteristics.
Wavelength-division multiplexing (WDM) is crucial for increasing optical communication capacity.
Phased-array devices require precise control over optical path lengths and power distribution.

Purpose of the Study:

To present novel designs for phased-array wavelength-division multiplexers (WDMs).
To leverage the self-imaging properties of MMI couplers for WDM device design.
To demonstrate the potential for compact, low-loss, and uniform WDM devices.

Main Methods:

Theoretical formulation for N-channel MMI-based WDMs.
Optimization procedure for array waveguide lengths.
Simulation of device performance in a rib waveguide system.
Design of nonuniform MMI power splitters for sidelobe suppression.

Main Results:

MMI couplers act as power splitters/combiners, with waveguide arrays serving as dispersive elements.
A general theoretical framework for N-channel multiplexers was developed.
A method for optimizing array guide lengths was established.
Simulations confirmed the feasibility of five-channel devices with potential for sidelobe reduction.

Conclusions:

MMI-based phased-array WDMs offer a pathway to small-size, low-loss devices.
These devices can function as N x N wavelength-selective interconnects.
Nonuniform MMI coupler design can effectively suppress spectral sidelobes, improving device performance.