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公开(公告)号：US20240319461A1
公开(公告)日：2024-09-26
申请号：US18124701
申请日：2023-03-22
申请人： OFS Fitel, LLC
IPC分类号： G02B6/44
CPC分类号： G02B6/4403
摘要： Embodiments of the invention include an optical fiber ribbon. The optical fiber ribbon includes a plurality of optical fibers arranged adjacent to one another in a linear array. The optical fiber ribbon also includes a bonding matrix material applied to at least a portion of the outer surface of at least two adjacent optical fibers. The optical fiber ribbon also includes at least one marking applied to the outer surface of at least one optical fiber. The at least one marking is applied to the outer surface of at least one optical fiber in a manner that reduces the optical transmission loss of the optical fibers.
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公开(公告)号：US20240103214A1
公开(公告)日：2024-03-28
申请号：US18275247
申请日：2022-02-02
申请人： OFS Fitel, LLC
发明人： Robert S Dyer , Adam Hokansson , Matthew Popelka , Brian Savran , Paul S Westbrook , Vixay R Soundara , Andrei A Stolov
IPC分类号： G02B6/02 , C03B37/10 , C03C13/04 , C03C25/106
CPC分类号： G02B6/02104 , C03B37/10 , C03C13/04 , C03C25/106 , G02B6/02123 , C03C2213/00 , G02B2006/02161
摘要： Described herein are systems, methods, and articles of manufacture for a coated fiber modified by actinic radiation to increase back-scattering, which experiences very little back-scattering decay at a temperature and time of exposure that is sufficient to noticeably degrade the coating and/or noticeably degrade the optical fiber due to outgassing of hydrogen from the coating. In one embodiment, an optical fiber comprises a fiber length, a coating having a treated coating weight, wherein the treated coating weight is at least 25% less of an original coating weight prior to an annealing treatment, and an optical back-scatter along the fiber length greater than a Rayleigh back-scattering over the fiber length, wherein the optical back-scatter does not decrease along the fiber length by more than 3 dB after exposure to annealing treatment. A further embodiment relates to a method comprising receiving an optical fiber at an inlet of at least one heat source, the optical fiber including a coating having an original coating weight and an optical back-scatter along a fiber length and applying an annealing treatment to the optical fiber by the least one heat source at a predetermined temperature Ta during a predetermined time ta, wherein the original coating weight is reduced by at least 25% to a treated coating weight during the annealing treatment, wherein the optical back-scatter does not decrease along the fiber length by more than 3 dB after the annealing treatment.
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公开(公告)号：US20240103213A1
公开(公告)日：2024-03-28
申请号：US18273217
申请日：2022-01-24
申请人： OFS Fitel, LLC
发明人： Adam Hokansson , Jie Li , Xiaoguang Sun
CPC分类号： G02B6/02042 , G02B6/4413
摘要： A multi-core optical fiber comprises at least two (2) helical cores. When the multi-core optical fiber is bent, such that it has a bend length (L) and a bend radius (R), each core experiences a different strain, thereby resulting in an effective optical length difference (δl) between the cores. In the present disclosure, the helical cores have a pitch (P) that reduces δl/L to a value that is less than 5·10−6 (i.e., δl/L
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4.发明申请公开(公告)号：US20230137926A1
公开(公告)日：2023-05-04
申请号：US17911071
申请日：2021-03-15
申请人： OFS Fitel, LLC
发明人： Raja A Ahmad , Paul S Westbrook
摘要： A system for sensing microbends and micro-deformations in three-dimensional space is based upon a distributed length optical fiber formed to include a group of offset cores disposed in a spiral configuration along the length of the fiber, each core including a fiber Bragg grating that exhibits the same Bragg wavelength. A micro-scale local deformation of the multicore fiber produces a local shift in the Bragg wavelength, where the use of multiple cores allows for a complete micro-scale modeling of the local deformation. Sequential probing of each core allows for optical frequency domain reflectometry (OFDR) allows for reconstruction of a given three-dimensional shape, delineating location and size of various microbends and micro-deformations.
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公开(公告)号：US20220337015A1
公开(公告)日：2022-10-20
申请号：US17636884
申请日：2020-08-18
申请人： OFS Fitel, LLC
摘要： An optical fiber amplifier is formed to include a grating structure inscribed within the rare earth-doped gain fiber itself, providing distributed wavelength-dependent filtering (attenuation) and minimizing the need for any type of gain-flattening filter to be used at the output of the amplifier. The grating structure may be of any suitable arrangement that provides the desired loss spectrum, for example, similar to the profile of a prior art discrete GFF. Various types of grating structures that may be used to provide distributed wavelength-dependent filtering along the gain include, but are not limited to, tilted gratings, weak Bragg gratings, long-period grating (LPG), and any suitable combination of these grating structures.
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公开(公告)号：US11300749B2
公开(公告)日：2022-04-12
申请号：US16924619
申请日：2020-07-09
申请人： OFS Fitel, LLC
摘要： Before pulling a leading end of a fiber optic cable through a duct in order to splice the cable fibers to other fibers located at a far end of the duct, the outer jacket of the cable and elements surrounding the cable fibers are removed to expose the fibers. The exposed fibers are prepared by (a) removing coatings on the fibers, (b) cleaving the ends of the fibers, and (c) placing the cleaved fibers into one or more protective covers. A cable grip or sock is dimensioned and formed to envelop the leading end of the cable including the protective covers, up to and including the outer jacket. The grip together with the cable are pulled through the duct, and the grip and the protective covers are removed at the far end of the duct to expose the cleaved fibers for splicing to the other fibers at the far end.
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公开(公告)号：US11280977B2
公开(公告)日：2022-03-22
申请号：US17032859
申请日：2020-09-25
申请人： OFS Fitel, LLC
发明人： Harold P. Debban , Peter A. Weimann , Heng Ly
IPC分类号： G02B6/44
摘要： A fiber-optic cable having optical fibers that are arranged as a rollable ribbon. Water-swellable material (e.g., superabsorbent liquid, superabsorbent powder, superabsorbent adhesive, etc.) is applied directly to the rollable ribbon, thereby eliminating the need to incorporate conventional water-absorbing yarns, tapes, or other such similar materials. The rollable ribbon is surrounded by a tube, with a dielectric strength member positioned external to the tube and substantially parallel to the tube. A jacket, with a ripcord along a substantial length of the jacket, surrounds the tube. Also taught is a process for manufacturing a rollable-ribbon fiber-optic cable, in which a water-swellable material is applied directly to the rollable ribbon, thereby eliminating the need to incorporate conventional water-absorbing yarns, tapes, or other such similar materials.
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公开(公告)号：US11248144B2
公开(公告)日：2022-02-15
申请号：US16844038
申请日：2020-04-09
申请人： OFS Fitel, LLC
发明人： Debra A Simoff , Kenneth S Feder , Yaowen Li , Jacob Wrubel , Kenichi Suyama , Mei Wen
IPC分类号： C08G77/14 , C09D183/06 , C08G77/04 , C08G77/20 , C09D183/04 , B05D3/06 , C03C23/00 , C03C25/106
摘要： Disclosed herein is a coating composition comprising a silsesquioxane component having one or more reactive functional groups that render it curable using ultraviolet radiation; where the one or more reactive functional groups are selected from the group consisting of an acrylate, a vinyl ether, or an epoxy; and optionally, a co-reactive non-silsesquioxane monomer and/or an oligomer having one or more reactive functional groups that are curable using ultraviolet radiation and are selected from the group consisting of free radically curable acrylates, cationically curable epoxies, and cationically curable vinyl ethers; where the coating composition is disposed and cured on an optical article; where the optical article is at least one of an optical fiber or an optical planar waveguide; and where the average functionality of the composition is greater than one.
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公开(公告)号：US11221444B2
公开(公告)日：2022-01-11
申请号：US16373848
申请日：2019-04-03
申请人： OFS Fitel, LLC
发明人： Brian Mangan , Gabriel Puc , Matt Corrado , Tristan Kremo
IPC分类号： G02B6/02 , C03B37/027
摘要： The selection of starting materials used in the process of forming an MCR is controlled to specifically define the physical properties of the core tube and/or the capillary tubes in the local vicinity of the core tube. The physical properties are considered to include, but are not limited to, the diameter of a given tube/capillary, its wall thickness, and its geometry (e.g., circular, non-circular). A goal is to select starting materials with physical properties that yield a final hollow core optical fiber with a “uniform” core region (for the purposes of the present invention, a “uniform” core region is one where the struts of cladding periodic array surrounding the central core are uniform in length and thickness (with the nodes between the struts thus being uniformly spaced apart), which yields a core wall of essentially uniform thickness and circularity.
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10.发明授权公开(公告)号：US11203547B2
公开(公告)日：2021-12-21
申请号：US16042247
申请日：2018-07-23
申请人： OFS Fitel, LLC
IPC分类号： C03B37/025 , G02B6/02
摘要： A technique for fabricating a hollow core optical fiber with a controllable core region (in terms of diameter) is based upon regulating conditions (gas flow, volume, and/or temperature) within the hollow core region during the fiber draw process. The introduction of a gas, or any change in volume or temperature of the hollow core region, allows for the diameter of the hollow core region to self-regulate as a multistructured core rod (MCR) is drawn down into the final hollow core optical fiber structure. This self-regulation provides a core region having a diameter that selected and then stabilized for the duration of the draw process. The inventive process is also useful in controlling the diameter of any selected hollow region of an MCR including, but not limited to, shunts and corner capillaries disposed around the core region.
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