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公开(公告)号：US11817672B2
公开(公告)日：2023-11-14
申请号：US17582505
申请日：2022-01-24
IPC分类号： H01S3/1118 , H01S3/067 , H01S3/081 , H01S3/00
CPC分类号： H01S3/1118 , H01S3/0675 , H01S3/06791 , H01S3/0811 , H01S3/0812 , H01S3/0057 , H01S2301/04 , H01S2301/085
摘要： A pulse stretching fiber oscillator (or laser cavity) may comprise a chirped fiber Bragg grating (CFBG) and an optical circulator arranged such that a first portion of a beam that is transmitted through the CFBG continues to propagate through the laser cavity while a second portion of the beam that is reflected from the CFBG is stretched and chirped by the CFBG and directed out of the laser cavity by the optical circulator. Accordingly, a configuration of the CFBG and the optical circulator in the laser cavity may enable pulse stretching contemporaneous with outcoupling, which may prevent deleterious nonlinear phase from accumulating prior to stretching.
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公开(公告)号：US10690854B2
公开(公告)日：2020-06-23
申请号：US16582487
申请日：2019-09-25
IPC分类号： G02B6/44 , G02B6/14 , C03B37/027 , C03B37/15 , G02B6/10 , G02B6/024 , G02B6/26 , G02B6/27 , G02B6/02 , G02B6/036
摘要： An optical fiber device may include a unitary core including a primary section and a secondary section, wherein at least a portion of the secondary section is offset from a center of the unitary core, wherein the unitary core twists about an optical axis of the optical fiber device along a length of the optical fiber device, and wherein a refractive index of the primary section is greater than a refractive index of the secondary section; and a cladding surrounding the unitary core.
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公开(公告)号：US09703099B2
公开(公告)日：2017-07-11
申请号：US15003514
申请日：2016-01-21
发明人： Xiuquan Ma , Dmitriy Panasenko , Martin H. Muendel
CPC分类号： G02B27/0025 , G02B3/0087 , G02B6/25 , G02B6/255 , G02B13/0095 , G02B27/30
摘要： An aberration corrector and a method to reducing a spherical aberration are disclosed. The aberration corrector has a radial, rotationally symmetric variation of refractive index including a term varying in proportion to a fourth degree of a distance from the optical axis. Since the spherical aberration causes a wavefront deviation proportional to the fourth degree of distance from the optical axis, the spherical aberration can be reduced by the aberration corrector when its thickness causes the exact amount of the phase delay corresponding to the wavefront deviation, but with an opposite sign.
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公开(公告)号：US09250390B2
公开(公告)日：2016-02-02
申请号：US13707446
申请日：2012-12-06
发明人： Martin H. Muendel , Dahv Kliner
IPC分类号： G02B6/26 , G02B6/32 , G02B6/42 , B23K26/06 , B23K26/073
CPC分类号： G02B6/32 , B23K26/0626 , B23K26/0648 , B23K26/073 , B23K26/0734 , G02B6/262 , G02B6/4206 , G02B6/4216 , G02B6/4226 , G02B6/4296
摘要： An optical delivery waveguide for a material laser processing system includes a small lens at an output end of the delivery waveguide, transforming laser beam divergence inside the waveguide into a spot size after the lens. By varying the input convergence angle and/or launch angle of the laser beam launched into the waveguide, the output spot size can be continuously varied, thus enabling a continuous and real-time laser spot size adjustment on the workpiece, without having to replace the delivery waveguide or a process head. A divergence of the laser beam can also be adjusted dynamically and in concert with the spot size.
摘要翻译： 用于材料激光处理系统的光学传输波导包括在传送波导的输出端处的小透镜，将波导内部的激光束发散转换成透镜后的光斑尺寸。 通过改变发射到波导中的激光束的输入会聚角和/或发射角，可以连续地改变输出光斑尺寸，从而能够在工件上进行连续且实时的激光光斑尺寸调节，而无需更换 输送波导或过程头。 也可以动态地调整激光束的发散度并且与光斑尺寸一致。
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公开(公告)号：US11808970B2
公开(公告)日：2023-11-07
申请号：US17454709
申请日：2021-11-12
发明人： Vincent Petit , Martin H. Muendel
IPC分类号： G02B6/02 , H01S3/067 , C03B37/027 , C03B37/012
CPC分类号： G02B6/02295 , C03B37/01211 , C03B37/027 , C03B37/02763 , G02B6/02376 , H01S3/06716 , H01S3/06745 , C03B2201/10 , C03B2201/12 , C03B2201/28 , C03B2201/31 , C03B2203/20 , C03B2203/22
摘要： An optical fiber may comprise a core doped with one or more active ions to guide signal light from an input end of the optical fiber to an output end of the optical fiber, a cladding surrounding the core to guide pump light from the input end of the optical fiber to the output end of the optical fiber, and one or more inserts formed in the cladding surrounding the core. The core may have a geometry (e.g., a cross-sectional size, a helical pitch, and/or the like) that varies along a longitudinal length of the optical fiber, which may cause an absorption of the pump light to be modulated along the longitudinal length of the optical fiber.
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公开(公告)号：US11650367B2
公开(公告)日：2023-05-16
申请号：US16853469
申请日：2020-04-20
CPC分类号： G02B6/0281 , G02B6/262 , G02B6/32 , B23K26/0648
摘要： An optical device may include a fiber to provide a beam. The optical device may include a graded-index element to expand or magnify the beam. An input facet of the graded-index element may be adhered to an output facet of the fiber. The optical device may include an optical transformation element to transform the beam after the beam is expanded or magnified by the graded-index element. An input facet of the optical transformation element may be adhered to an output facet of the graded-index element.
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公开(公告)号：US11592612B2
公开(公告)日：2023-02-28
申请号：US17190207
申请日：2021-03-02
摘要： In some implementations, a waveguide may comprise an inner core to receive a first beam and an outer core surrounding the inner core to receive a second beam that is displaced from the first beam by an offset. The outer core may comprise a beam guiding region that rotationally expands over a length of the waveguide into an annulus that concentrically surrounds the inner core or a partial annulus that partially surrounds the inner core. For example, the beam guiding region may be defined by one or more low refractive index features that have a varied orientation and/or a varied shape over the length of the waveguide such that the second beam enters the waveguide as an offset beam and exits from the waveguide as a ring-shaped beam or a partial ring-shaped beam.
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公开(公告)号：US20220149580A1
公开(公告)日：2022-05-12
申请号：US17582505
申请日：2022-01-24
摘要： A pulse stretching fiber oscillator (or laser cavity) may comprise a chirped fiber Bragg grating (CFBG) and an optical circulator arranged such that a first portion of a beam that is transmitted through the CFBG continues to propagate through the laser cavity while a second portion of the beam that is reflected from the CFBG is stretched and chirped by the CFBG and directed out of the laser cavity by the optical circulator. Accordingly, a configuration of the CFBG and the optical circulator in the laser cavity may enable pulse stretching contemporaneous with outcoupling, which may prevent deleterious nonlinear phase from accumulating prior to stretching.
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公开(公告)号：US11243364B2
公开(公告)日：2022-02-08
申请号：US16947465
申请日：2020-08-03
摘要： A graded index fiber having a refractive index profile that causes a beam to be re-imaged in the graded index fiber with a regular period may include a set of bends that have a bend period matched to or nearly matched to a pitch of the graded index fiber. For example, the set of bends may be formed in the graded index fiber using one or more bending devices that include one or more protrusions that have a periodicity matched to or nearly matched to a pitch of the graded index fiber. A first section of the one or more bending devices may be actuated to move towards a second section of the one or more bending devices such that the one or more protrusions cause the bends to be formed in the graded index fiber.
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公开(公告)号：US09547121B2
公开(公告)日：2017-01-17
申请号：US14166600
申请日：2014-01-28
发明人： Kai-Chung Hou , Dahv Kliner , Martin H. Muendel , Jeremy Weston
CPC分类号： H01S3/06729 , B23K26/0622 , B23K26/0626 , B23K26/36 , B29D11/00663 , G02B6/02066 , G02B6/14 , G02B6/264 , G02B6/2852 , H01S3/06733 , H01S3/094007 , H01S3/0941
摘要： A cladding stripper includes a plurality of transversal notches or grooves in the outer surface of an exposed inner cladding of a double clad optical fiber. Position and orientation of the notches can be selected to even out cladding light release along the cladding light stripper, enabling more even temperature distributions due to released cladding light. The notches on the optical fiber can be made with a laser ablation system.
摘要翻译： 包层剥离器在双包层光纤的暴露的内包层的外表面中包括多个横向凹口或沟槽。 可以选择凹口的位置和取向以均匀地包覆沿着包层光剥离器的光释放，由于释放的包层光而能够实现更均匀的温度分布。 光纤上的凹口可以用激光烧蚀系统制成。
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