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公开(公告)号：US20250076668A1
公开(公告)日：2025-03-06
申请号：US18696775
申请日：2022-09-30
Applicant: nLIGHT, Inc.
Inventor： Roger L. Farrow , Dahv A.V. Kliner , Juan Carlos LUGO , Brendan G. O'DEA
Abstract: 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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公开(公告)号：US20240396283A1
公开(公告)日：2024-11-28
申请号：US18671923
申请日：2024-05-22
Applicant: nLIGHT, Inc.
Inventor： Brendan G. O'DEA , Roger L. Farrow , Juan Carlos LUGO , Brian M. VICTOR , Dahv A.V. Kliner
Abstract: A method of generating adjustable composite beam shapes in response to controllable perturbation includes receiving, via inputs of multiple input fibers, different laser beams, combining the outputs from the multiple input fibers into a divergence-preserving fiber that preserves a combined divergence distribution of the intermediate beams; and converting at an output lens the combined divergence distribution to an output transverse spatial intensity distribution defining a composite beam shape of an output beam. The output transverse spatial intensity distribution includes a superposition of individual channel output beams. At least one of the multiple input fibers has a tunable fiber assembly with a series of first, second, and third portions that adjust an input transverse spatial intensity distribution in response to controllable perturbation, convert the input transverse spatial intensity distribution to an intermediate divergence distribution, and preserve the intermediate divergence distribution that is delivered to the fused fiber combiner.
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公开(公告)号：US20250035871A1
公开(公告)日：2025-01-30
申请号：US18712985
申请日：2022-11-23
Applicant: nLIGHT, Inc.
Inventor： Roger L. Farrow , Dahv A.V. Kliner , Juan Carlos LUGO , Brendan G. O'DEA
Abstract: Disclosed are optical beam delivery devices and methods to modify an angular intensity distribution of an input beam so that it is converted to an output beam having an adjustable near-field transverse spatial intensity distribution. In some embodiments, adjustment of the angular intensity distribution is achieved by increasing an angular offset in response to controllable perturbation. In some other embodiments, adjustment of the angular intensity distribution is achieved by increasing an angular width (divergence) in response to controllable perturbation.
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公开(公告)号：US20240393580A1
公开(公告)日：2024-11-28
申请号：US18671882
申请日：2024-05-22
Applicant: nLIGHT, Inc.
Inventor： Brendan G. O'DEA , Roger L. Farrow , Juan Carlos LUGO , Brian M. VICTOR , Dahv A.V. Kliner
Abstract: A fused fiber combiner combines outputs from multiple, separately controllable input fibers. At least one of the input fibers includes a portion to vary a transverse spatial intensity distribution in response to controllable perturbation, a portion to convert position to angle, and a portion to preserve the divergence distribution. An output of the combiner is coupled to a divergence-preserving fiber, which preserves a combined divergence distribution guided by the divergence-preserving fiber. An output GRIN lens maps the combined divergence distribution to an output transverse spatial intensity distribution defining a composite beam shape of an output beam, the output transverse spatial intensity distribution representing a superposition of individual channel output beams.
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