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For New Applications, Give Photonic Fiber a Twist

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ERLANGEN, Germany, Aug. 10, 2012 — Simple longitudinal twists that convert photonic crystal fibers (PCFs) into filters were measured and theorized upon; the results suggest new applications in optical communications and will enable the construction of sensors, light amplifiers and lasers. Glass fibers typically are used to transport light over long distances — for example, fast data transmission over the Internet. PCFs are a novel variant of such optical fibers and are currently used for basic research. Their cross section is similar to that of a honeycomb: tiny hollow tubes surrounding the core run along the...Read full article

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    Published: August 2012
    Glossary
    optical communications
    The transmission and reception of information by optical devices and sensors.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    supercontinuum
    Supercontinuum refers to a broad spectrum of light that spans a wide range of wavelengths, typically from the visible to the near-infrared or even mid-infrared regions of the electromagnetic spectrum. This phenomenon occurs when intense laser light is coupled into a nonlinear optical medium, such as a photonic crystal fiber or a nonlinear crystal. The process of supercontinuum generation involves nonlinear effects such as self-phase modulation, stimulated Raman scattering, and four-wave...
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