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  • Volume 4, Issue 9
  • Volume 4, Issue 9

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    DWDM & ROADM

    Making gratings from doped fibers with near-UV radiation

    Sept. 1, 2002
    Using longer wavelengths to write fiber Bragg gratings could ease the process-if researchers can speed up the writing at these wavelengths. By doping the fiber with holmium and...
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    DWDM & ROADM

    New Products

    Sept. 1, 2002
    Band WDM products utilize proprietary thin-film filter technology to achieve wavelength and channel isolation and stability. The 100- and 200-GHz (4 Skip 0) Band WDM products ...
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    DWDM & ROADM

    High-port-count interleavers provide network design options

    Sept. 1, 2002
    The technique of interleaving wavelengths is an effective way to narrow e×isting 200- or 100-GHz DWDM systems down to 50-, 33-, or 25-GHz channel spacing. To accomplish this goal...
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    Components

    AWG configuration reaches across S- and L-bands

    Sept. 1, 2002
    Researchers at NTT Photonics Laboratories in Ibaraki, Japan, have invented an arrayed-waveguide device that operates over a wide wavelength range, produces a stable, narrowband...
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    DWDM & ROADM

    Simultaneous measurement speeds the pace of production

    Sept. 1, 2002
    Falling prices coupled with a market slowdown during the last 18 months have driven a major shift in component manufacturers' priorities. Reducing production costs has replaced...

    More content from Volume 4, Issue 9

    DWDM & ROADM

    An easy question

    Sept. 1, 2002
    How are you? In any language, the question is usually a casual form of greeting and the person posing it doesn't expect a real answer. Yet these days it is the question that we...
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    Components

    Measuring tiny mode-field diameters allows efficient coupling

    Sept. 1, 2002
    Lensed and tapered specialty fibers are designed to optimize coupling between the fiber and optical components such as edge-emitting laser diodes and the waveguides in an integrated...
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    DWDM & ROADM

    Pulse-generating lasers drive high-speed applications

    Sept. 1, 2002
    The evolution to higher data rates such as 40 Gbit/s requires a number of new engineering solutions. Among them is a change to return-to-zero (RZ) coding format. As with all technical...