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'micro-Rings' Could Nix Wires For Communications in Homes, Offices

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Purdue University researchers have developed a device that uses micro-ring resonators to convert laser pulses into bursts of pulsating radio-frequency signals that avoid interference. The researchers say the technology could eliminate the need for wires when transferring data in homes, offices, and cars. The technology could enable all communications to be transmitted from a single base station, says Purdue professor Minghao Qi. Similar technology could eventually be developed to both transmit and receive signals.

The key factor in making the breakthrough practical is that the pulses transmit radio frequencies of up to 60 gigahertz, which does not require a license in the United States. The unlicensed band also is permitted globally, which would allow the system to be implemented worldwide.

The system's tiny silicon microring resonators filter out certain frequencies and allow others to pass. The microring filter can be tuned by heating the rings, which causes them to change and filter out different frequencies.

From Purdue University News
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