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C-Band Er/Yb Fiber Laser Generates 43 W

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Breck Hitz

Tunable lasers in the eye-safe, 1.5- to 2.0-µm region are useful for remote optical sensing, range-finding and free-space communication. Erbium-doped fiber lasers have the necessary gain bandwidth to cover shorter wavelengths of this spectral region, but they have several drawbacks. The erbium ion doesn't absorb well at the wavelengths of readily available diode lasers. Moreover, it is difficult to perform routine tasks such as splicing and writing gratings in double-clad fibers that have nonstandard outer diameters, so, for tuning, most cladding-pumped, tunable lasers rely on external,...Read full article

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