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Using Sound for Faster Optical Communications Networks

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As data demands increase, researchers find that stimulated Brillouin scattering, which is based on interactions between light and sound, may hold solutions.

AMOL CHOUDHARY, INDIAN INSTITUTE OF TECHNOLOGY, (IIT) DELHI, AND ELIAS GIACOUMIDIS, DUBLIN CITY UNIVERSITY

Data information is transferred across and within countries, cities, and continents at near the speed of light, and optical fibers carry most of it. Such speeds seem adequate for the current global internet backbone. However, because of the popularity of services such as Netflix and YouTube, optical fibers are now coming under huge pressure to meet the demands of increased data traffic. Research in fiber optic networks is responding to this demand on several fronts: by moving to spatial division multiplexing where various modes of light are transmitted over the same optical fiber, or by...Read full article

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    Published: August 2019
    Glossary
    optical communications
    The transmission and reception of information by optical devices and sensors.
    digital signal processing
    Digital signal processing (DSP) refers to the manipulation and analysis of signals, which are representations of physical quantities that vary over time or space. In the context of DSP, these signals are typically electrical or electromagnetic and can represent various types of information, such as audio, video, temperature, pressure, or other measurable phenomena. DSP involves the use of digital processing techniques to modify or analyze these signals. The primary goal is often to extract...
    stimulated brillouin scattering
    In Stimulated Brillouin Scattering (SBS), an incident photon (usually laser light) interacts with acoustic phonons in a medium. The energy and momentum of the incident photon are transferred to the acoustic phonons, resulting in the creation of a scattered photon with a slightly different frequency (Stokes shift). Another scattered photon, called the anti-Stokes photon, can also be generated with a frequency higher than that of the incident photon. SBS is particularly important in the...
    optical fibersoptical communicationsdata trafficFiber Optic Networksdigital signal processingDSPhyperscale data centerslocal oscillator lasersLO lasersOFDMself-coherent OFDMself-CO-AFDMstimulated Brillouin scatteringSBSchalcogenide photonic chipsarbitrary waveform generatorsAWGquadrature amplitude modulationQAMFeatures

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