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Adding Laser Beams: The Best of Both Worlds

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Technique utilizes both spectral and coherent beam combining.

Breck Hitz

The combined illumination provided by two automobile headlights is twice that provided by a single headlight. However, it doesn’t work that way with lasers. Even if the lasers are aligned with closely spaced parallel beams — so that the beams essentially overlap in the distance, as automobile headlights do — interference effects among the coherent beams still can cause a drastic reduction in beam quality and also in the power delivered to a target. There are two, or maybe three, ways around this problem. The first, called spectral combining, is to offset the lasers’ wavelengths from each...Read full article

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    Published: June 2008
    Basic Sciencebeam qualityfiber lasersResearch & Technologysingle beamLasers

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