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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：US20240393604A1
公开(公告)日：2024-11-28
申请号：US18672866
申请日：2024-05-23
Applicant: nLIGHT, Inc.
Inventor： Brian M. VICTOR
Abstract: A laser processing system has a laser source and a divergence-tuning beam characteristic conditioner configured to, in response to a control input, repetitively change a variable divergence laser beam between a first divergence and a second divergence that is different from the first divergence. The system also includes a process head having a collimating lens and a focusing lens. And the system includes a delivery fiber coupled to the divergence-tuning beam characteristic conditioner for guiding the variable divergence laser beam and launching it to the process head. The collimating lens is configured to receive the variable divergence laser beam and direct it as an intermediate beam to the focusing lens to focus the intermediate beam toward the workpiece at a first depth corresponding to the first divergence and at a second depth corresponding to the second divergence.
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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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