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Bus Impedance Matrix

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Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
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Related Experiment Video

Updated: Mar 8, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Microring modulator matrix integrated with mode multiplexer and de-multiplexer for on-chip optical interconnect.

Hao Jia, Lei Zhang, Jianfeng Ding

|January 14, 2017

Summary

We developed a photonic circuit for on-chip optical interconnects, achieving high data transmission speeds using mode multiplexing. This technology boosts communication capacity within limited chip areas.

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Area of Science:

Photonics
Optical Communications
Integrated Circuits

Background:

On-chip optical interconnects are crucial for high-performance computing.
Increasing communication capacity within limited chip areas is a significant challenge.

Purpose of the Study:

To demonstrate a novel microring modulator matrix for on-chip optical interconnects.
To enhance data throughput capacity using mode and wavelength multiplexing.

Main Methods:

Integration of a 4x4 microring modulator matrix with asymmetrical directional couplers.
Utilizing mode multiplexing and de-multiplexing for spatial and wavelength division multiplexing.

Main Results:

Achieved inter-mode optical crosstalk below -20 dB over a 1525 nm to 1565 nm wavelength range.
Demonstrated data transmission with a throughput capacity of 4x4x32 Gbps.

Conclusions:

The developed photonic circuit offers a potential solution for increasing on-chip communication capacity.
This technology is suitable for high-density, high-speed optical interconnects in integrated circuits.