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Related Experiment Video

Updated: Dec 3, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

E-TUBE: dielectric waveguide cable for high-speed communication.

Ha Il Song^1,2, Joon-Yeong Lee², Hyosup Won²

¹Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.

Scientific Reports

|October 27, 2020

Summary

A novel electrical interconnect, E-TUBE, offers a cost-effective solution for high-speed data centers. This waveguide technology achieves superior throughput-distance, enabling advanced communication links.

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Area of Science:

Electrical Engineering
Materials Science
Data Communications

Background:

Data centers require advanced interconnects for increased bandwidth, reduced cost, and lower power consumption.
Existing electrical and optical interconnects face limitations in meeting these growing demands.

Purpose of the Study:

To introduce E-TUBE, a novel all-electrical-domain waveguide interconnect.
To demonstrate E-TUBE's capability as a cost-and-power-efficient solution for high-speed, short-reach communication links.

Main Methods:

Development of the E-TUBE waveguide interconnect.
Characterization of its bandwidth, insertion loss, and group delay.
Demonstration of data transmission using a 70 GHz RF CMOS transceiver IC.

Main Results:

E-TUBE achieves nearly 25 GHz bandwidth at 70 GHz carrier frequency.
Exhibits frequency-independent insertion loss (5 dB/m) and group delay (4 ns/m).
Successfully transmitted 25 Gbps NRZ data over 3 meters, setting a new throughput-distance record.

Conclusions:

E-TUBE offers an unprecedented throughput-distance product, bending radius, and channel density.
Its frequency-independent characteristics enable broadband data transmission over extended reaches.
E-TUBE is poised to replace existing interconnects in high-throughput applications like 100/400 Gbps board-to-board communications.