An international team of researchers from the Technical University of Denmark and the Swedish Institute of Technology
The source is a specially developedan optical chip that uses light from a single infrared laser to create an iridescent spectrum of many colors. The conversion is performed by an optical source with a frequency comb based on a silicon nitride ring resonator. Thus, light with one wavelength can be used to generate multiple waves with different frequencies.
All generated colors are fixed toa certain distance apart in frequency - just like the teeth on a comb - that's why it's called a frequency comb, the scientists explain. Each color (or frequency) can then be isolated and used to "record" the data. After that, all the data was again combined into a single beam, which was transmitted over an optical fiber.
An experimental demonstration showed that onea chip generating 223 different wavelengths can easily transmit 1.8Pbps. In comparison, using modern equipment, this would require more than a thousand lasers. The optimized chip will reduce electricity consumption and reduce the impact of the Internet and other communication networks on climate change, the scientists add.
The researchers emphasize that thevalue is not the limit. Computer simulations have shown that by scaling up the new chip, it is possible to transmit up to 100 Pbit of information per second using a single laser. The researchers will continue to work on developing their technology.
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