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Femtosecond Pulses Write Grating in Nonphotosensitive Fiber

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Technique may lead to more efficient, less expensive fiber lasers.

Breck Hitz

Although fiber Bragg gratings can readily be written in photosensitive fibers with ultraviolet radiation, it is far more difficult to write them in the rare-earth-doped fibers that comprise all fiber lasers. As a result, the gratings that serve as resonator mirrors in most fiber lasers today are created in photosensitive fibers and then spliced onto the rare-earth-doped fiber. Although this approach is workable, it involves an extra step and introduces a splice loss to the laser. Researchers at Friedrich Schiller University and at Fraunhofer Institute for Applied Optics and Precision...Read full article

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    Published: October 2006
    fiber Bragg gratingsindustrialphotosensitive fibersrare-earth-doped fibersResearch & Technology

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