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Focusing High-Power, Single-Mode Laser Beams

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Thermal effects in lenses and windows can have a dramatic effect on industrial applications.

Felix Abt, Axel Heß and Friedrich Dausinger, FGSW Forschungsgesellschaft für Strahlwerkzeuge mbH

New generations of thin-disk and fiber lasers are combining excellent beam quality — M2 typically between 1.2 and ∼8 — with kilowatts output power. This combination brings the performance of beam-forming optics into question.1, 2 In this article, we will discuss the emerging difficulties of focusing these high-brightness laser beams for materials-processing applications. Appropriate power density and distribution in the focal plane are key factors for efficient and reliable materials processing. To achieve this, the laser beam must be transformed by an optical system....Read full article

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