公开(公告)号：US20230034097A1

公开(公告)日：2023-02-02

申请号：US17453441

申请日：2021-11-03

Applicant: Lumentum Operations LLC

Inventor： Richard D. FAULHABER ,  Martin H. MUENDEL ,  Patrick GREGG

IPC: G02F1/365

Abstract: In some implementations, a monolithic optical fiber may comprise a tapered core having a first diameter at an input end and a second diameter at an output end. The tapered core may comprise a first tapered region at the input end, a second tapered region at the output end, and a central region having a constant diameter that is larger than the first diameter and the second diameter. The first tapered region expands monotonically from the first diameter to the constant diameter of the central region along a length of the first tapered region, and the second tapered region contracts monotonically from the constant diameter of the central region to the second diameter along a length of the second tapered region. The monolithic optical fiber may be used as a delivery fiber to deliver a laser beam from a fiber laser engine to a process head.

公开(公告)号：US20240368021A1

公开(公告)日：2024-11-07

申请号：US18353414

申请日：2023-07-17

Applicant: Lumentum Operations LLC

Inventor： Richard D. FAULHABER ,  Patrick GREGG ,  Martin H. MUENDEL

IPC: C03B37/14 ,  G02B6/028 ,  G02B6/28

Abstract: In some implementations, a fiber processing machine may receive an optical assembly comprising an input fiber, an output fiber, and a graded index fiber spliced between the input fiber and the output fiber, wherein the graded index fiber has a pitch length and a processed length. A light source may deliver input light into an input end of the input fiber while one or more components monitor output light at an output end of the output fiber. The fiber processing machine may alter a core diameter and the processed length of the graded index fiber until one or more measurements of the output light at the output end of the output fiber indicate that the output light is a perfect image of the input light.

公开(公告)号：US20230318250A1

公开(公告)日：2023-10-05

申请号：US17809417

申请日：2022-06-28

Applicant: Lumentum Operations LLC

Inventor： Richard D. FAULHABER ,  Martin H. MUENDEL ,  Patrick GREGG ,  Ning LIU

IPC: H01S3/094 ,  H01S3/067 ,  H01S3/10 ,  H01S3/0941

CPC classification number: H01S3/094007 ,  H01S3/0675 ,  H01S3/10023 ,  H01S3/09415 ,  H01S3/06733

Abstract: In some implementations, a master oscillator power amplifier (MOPA) system may include one or more pump laser sources, a power amplifier, and a multicore oscillator that includes an input side coupled to the one or more pump laser sources and an output side coupled to the power amplifier. In some implementations, the multicore oscillator may include an active fiber, including an inner cladding, an outer cladding surrounding the inner cladding, and multiple active fiber cores, embedded in the inner cladding, to convert pump light into signal light. In some implementations, the multicore oscillator may include multiple first reflectors that are each configured to operate as a high reflector on the input side of the oscillator, and multiple second reflectors that are each configured to operate as an output coupler on the output side of the oscillator.

公开(公告)号：US20230280526A1

公开(公告)日：2023-09-07

申请号：US18317644

申请日：2023-05-15

Applicant: Lumentum Operations LLC

Inventor： Patrick GREGG ,  Martin H. MUENDEL ,  Richard D. FAULHABER

IPC: G02B6/028 ,  G02B6/02

CPC classification number: G02B6/0288 ,  G02B6/02042 ,  G02B6/02052

Abstract: 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. The optical transformation element may comprise at least one active optical element or may be non-birefringent such that orthogonal polarizations of the beam do not experience distinct phase transformations.

公开(公告)号：US20220196917A1

公开(公告)日：2022-06-23

申请号：US17167885

申请日：2021-02-04

Applicant: Lumentum Operations LLC

Inventor： Jeff GREGG ,  Xiang PENG ,  Richard D. FAULHABER ,  Patrick GREGG

IPC: G02B6/32 ,  H01S3/067 ,  F21V8/00

Abstract: An optical fiber includes a core configured to transmit laser light and a cladding that surrounds the core. In some implementations, an outer surface region of the cladding is tapered or comprises a plurality of notches. The outer surface region of the cladding is configured to cause an aiming beam that falls incident upon the outer surface region of the cladding at a first incidence angle to fall incident upon an outer surface region of the core at a second incidence angle to allow the aiming beam to couple into the core.

公开(公告)号：US20230116665A1

公开(公告)日：2023-04-13

申请号：US17645336

申请日：2021-12-21

Applicant: Lumentum Operations LLC

Inventor： Patrick GREGG ,  Martin H. MUENDEL ,  Richard D. FAULHABER ,  Alex HATCHER ,  John PECK

IPC: G02B6/02 ,  G02B6/028 ,  G02B6/42

Abstract: An in-fiber beam scanning system may comprise an input fiber to provide a beam, a feeding fiber comprising an imaging bundle with multiple cores embedded in a first cladding that is surrounded by a second cladding, and an in-fiber beam shifter that comprises a first multibend beam shifter coupled to the input fiber, a graded index fiber following the first multibend beam shifter, and a second multibend beam shifter following the graded index fiber and coupling into the feeding fiber. In some implementations, the first multibend beam shifter is actuated by a first amount and the second multibend beam shifter is actuated by a second amount to shift the beam in two dimensions and deliver the beam into one or more target cores in the imaging bundle.

公开(公告)号：US20220209486A1

公开(公告)日：2022-06-30

申请号：US17190207

申请日：2021-03-02

Applicant: Lumentum Operations LLC

Inventor： Patrick GREGG ,  Martin H. MUENDEL ,  Richard D. FAULHABER ,  James J. MOREHEAD ,  Jeff GREGG

IPC: H01S3/067 ,  G02B6/036 ,  G02B6/02

Abstract: 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.

公开(公告)号：US20210255469A1

公开(公告)日：2021-08-19

申请号：US16860476

申请日：2020-04-28

Applicant: Lumentum Operations LLC

Inventor： Patrick GREGG ,  Richard D. FAULHABER ,  Martin H. MUENDEL ,  Vincent PETIT ,  James J. MOREHEAD

IPC: G02B27/09 ,  G02B6/02

Abstract: An optical fiber may include a first core, a second core, and a cladding surrounding the first core and the second core. The second core may be at an off-center location with respect to a center of the optical fiber, or the second core may include an azimuthally nonuniform section at the off-center location. The second core may twist about an axis of the optical fiber along a length of the optical fiber, and the second core being twisted about the axis may cause an optical beam, launched into the second core at a first end of the optical fiber, to be at least partially converted to a rotary optical beam at a second end of the optical fiber.

公开(公告)号：US20200081187A1

公开(公告)日：2020-03-12

申请号：US16573814

申请日：2019-09-17

Applicant: Lumentum Operations LLC

Inventor： Patrick GREGG ,  Richard D. FAULHABER ,  James J. MOREHEAD ,  Vincent PETIT ,  Martin H. MUENDEL

IPC: G02B6/255 ,  G02B6/25

Abstract: A device may splice, at a target splice point, a first end of a twisted fiber having a non-concentric core to an input end of a target fiber having a concentric core to form a spliced fiber wherein the concentric core of the target fiber and the non-concentric core of the twisted fiber have a particular offset at the target splice point. The device may taper at least a portion of the twisted fiber to form a tapered region of the spliced fiber and such that the particular offset at the target splice point corresponds to a pre-configured core offset wherein the target splice point is within the tapered region of the spliced fiber.

公开(公告)号：US20250155641A1

公开(公告)日：2025-05-15

申请号：US19027002

申请日：2025-01-17

Applicant: Lumentum Operations LLC

Inventor： Richard D. FAULHABER ,  Martin H. MUENDEL ,  Patrick GREGG ,  James J. MOREHEAD

IPC: G02B6/255 ,  G02B6/02 ,  G02B6/245

Abstract: In some implementations, an optical fiber may include a core and a cladding surrounding the core. The core and the cladding may provide light guidance along the optical fiber in a light propagation direction. The core may have a taper in the light propagation direction in a section of the optical fiber. A diameter of the core may decrease independently of a diameter of the cladding in the section of the optical fiber.