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Four-Wave Mixing Trumps Homogeneous Gain in Erbium Laser

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Breck Hitz

Although current wavelength-division multiplexing (WDM) systems require a different laser for each wavelength transmitted over an optical fiber, engineers envision more-efficient systems in which a single laser will emit all of the necessary wavelengths. Laboratories around the world are investigating approaches to building lasers capable of generating multiple wavelengths simultaneously. The erbium-doped fiber laser is a favored candidate because the underlying technology has matured in telecom applications and could be adopted in WDM transmitters. But the lasers have a fundamental...Read full article

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    Published: October 2005
    Glossary
    optical fiber
    Optical fiber is a thin, flexible, transparent strand or filament made of glass or plastic used for transmitting light signals over long distances with minimal loss of signal quality. It serves as a medium for conveying information in the form of light pulses, typically in the realm of telecommunications, networking, and data transmission. The core of an optical fiber is the central region through which light travels. It is surrounded by a cladding layer that has a lower refractive index than...
    Communicationsfiber lasersfiber opticsoptical fiberResearch & Technologysingle laserTech Pulsewavelength-division multiplexing (WDM) systemsLasers

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