April 23, 2024

Technology can help avoid a capacity crunch by increasing bandwidth and reducing energy consumption.

Fiber optic technology is the ultimate in high-speed, long-distance telecommunications. Researchers are warning that there may be a capacity crunch due to the constant growth in internet traffic.

Researchers from the National Institute of Standards and Technology and the University of Maryland demonstrate how quantum-enhanced receivers can play a crucial role in this effort to address the challenge. AIP Publishing publishes AVS Quantum Science.

Scientists developed a technique to improve receivers using quantum physics properties. This allowed for dramatic increases in network performance and significant reductions in energy consumption.

Fiber optic technology uses receivers to detect optical signals and convert them into electrical signals. Shot noise, which results from random fluctuations in light, reduces detection and increases EBR.

This problem is solved by amplifying signals as the pulsating light weakens along an optic cable. However, there is a limit to how much amplification can be maintained when signs are barely perceptible.

In laboratory environments, quantum-enhanced receivers can simultaneously process two bits of classical information and overcome shot noise. This has been shown to increase detection accuracy. These and other quantum receivers use a separate reference beam with single-photon detection feedback to cancel out the input signal. This eliminates shot noise.

However, the enhanced receiver of the researchers can decode up to four bits per pulse because it is better at distinguishing between different input states.

They developed a modulation technique and implemented feedback algorithms that use single-photon detection times to make detection more efficient. Although no single measurement can be perfected, the new “holistically designed” communication system produces more accurate results.

Sergey Polyakov, the author, said that he had studied quantum receivers’ experimental techniques and theories of communication to create a practical protocol for telecommunications. We maximize the probability that the reference pulse will update to the correct state after the first photon detection. This ensures that the EBR is minimal at the end.

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