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Grating Is Written Directly into Ytterbium-Doped Silica Fiber

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Technique may lead to more robust high-power fiber lasers.

Breck Hitz

Fiber Bragg gratings (FBGs) are frequently used as the reflectors on fiber-laser resonators. These gratings are written in photosensitive fibers that are fused onto the doped-silica fiber that provides the laser gain. Making the fusion joints entails an extra step in fabricating the laser, introduces an additional intracavity loss mechanism and diminishes the laser’s overall robustness. Recently, scientists in Australia wrote an FBG directly into an ytterbium-doped silica fiber, resulting in a fusion-free fiber laser that produces more than 5 W. Figure 1. An ytterbium-doped fiber laser...Read full article

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    Published: August 2007
    energyfiber Bragg gratingsfiber lasersfiber opticsfiber-laser resonatorsphotosensitive fibersResearch & TechnologyLasers

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