Swiss Researchers Announce Breakthrough in Optical Efficiency
Researchers at the Ecole Polytechnique Fédérale de Lausanne in Switzerland have discovered a way to increase the capacity of fiber optic cables by optimizing the shape of each photonic pulse.
The breakthrough produces “Nyquist sinc pulses” almost perfectly. The pulses have a pointed shape, which enables them “to fit together tightly like the pieces of a jigsaw puzzle.” By reducing the spacing between pulses, more data can be transmitted in the same period. The researchers claim a 10X improvement in throughput using a simple laser and modulator to generate a pulse that is more than 99% perfect.
“These pulses have a shape that’s more pointed, making it possible to fit them together, a little bit like the pieces of a jigsaw puzzle lock together,” says Camille Brès of the Photonics Systems Laboratory (PHOSL). “There is of course some interference, but not at the locations where we actually read the data.”
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The breakthrough produces “Nyquist sinc pulses” almost perfectly. The pulses have a pointed shape, which enables them “to fit together tightly like the pieces of a jigsaw puzzle.” By reducing the spacing between pulses, more data can be transmitted in the same period. The researchers claim a 10X improvement in throughput using a simple laser and modulator to generate a pulse that is more than 99% perfect.
