SELECTABLE GAUSSIAN AND RING BEAM CHARACTERISTICS
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United States of America
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Issued Date -
Mar 6, 2025
app pub date -
Sep 30, 2022
filing date -
Sep 30, 2022
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Disclosed are optical beam delivery devices and methods to produce, from a single-mode input beam having a fundamental mode and an M2 beam quality of about 1.5 or less, an output beam having an adjustable spatial intensity distribution that is adjustable between near Gaussian and ring-shaped profiles, the near Gaussian profile corresponding to an M2 beam quality of about 1.5 or less. A first length of optical fiber is for adjusting the single-mode input beam to generate an adjustable beam based on controllable perturbation applied to the first length of optical fiber. A second length of optical fiber is for coupling the adjustable beam into one or both a central core confinement region and an annular higher-index confinement region. The second length of optical fiber is configured to provide at its output the output beam having the adjustable spatial intensity distribution.
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