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PI Physik Instrumente - Revolution In Photonics Align ROSLB 3/24

Modulation Scheme Dramatically Increases Capacity, Range of Next-Generation Fibers

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SUNNYVALE, Calif., March 17, 2015 — A new phase-modulation (PM) scheme may have found the “sweet spot” for long-distance communications over next-generation optical fibers. Infinera Corp. of California and BICS SA/NV of Belgium recently completed an extended laboratory trial of three PM schemes for transmission over OFS Terawave large-area/low-loss (LA/LL) optical fiber, which is optimized for terrestrial cables. The results show the dramatic improvement in optical reach and capacity that can be expected as these new fibers are deployed, Infinera said. One submarine trial showed that 8 quadrature...Read full article

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    Published: March 2015
    Glossary
    modulation
    In general, changes in one oscillation signal caused by another, such as amplitude or frequency modulation in radio which can be done mechanically or intrinsically with another signal. In optics the term generally is used as a synonym for contrast, particularly when applied to a series of parallel lines and spaces imaged by a lens, and is quantified by the equation: Modulation = (Imax – Imin)/ (Imax + Imin) where Imax and Imin are the maximum and minimum intensity levels of the image.
    BusinessAmericasEuropeCaliforniaBelgiumInfineraBICSOFSfiber opticsCommunications8QAM16QAMQPSKmodulation

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