Patents Assigned to OFS Fitel, LLC
  • Patent number: 10845558
    Abstract: A high count optical fiber cable is formed of a number of sub-unit components stranded around a central tension member. Each sub-unit component is formed to include the total number of individual fibers required to populate a given equipment rack (e.g., 288 fibers, for example). The individual fibers are preferably provided using a plurality of rollable optical fiber ribbons (permitting the large number of individual fibers to be compacted into a relatively small space), with water blocking material included in each sub-unit component. The sub-unit components may be formed to include individual strength members (i.e., in the form of sub-unit cables), or as loose tubes with an outer strength member disposed to surround the sub-units. Each sub-unit component is specifically sized to match the fiber capacity of, for example, a full equipment rack, minimizing the number of physical cables required for high density applications (e.g., data centers).
    Type: Grant
    Filed: February 7, 2017
    Date of Patent: November 24, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Harold P Debban, Peter A Weimann
  • Patent number: 10827911
    Abstract: A vortex optical fiber for use in an illumination subsystem of an optical imaging system (e.g., a stimulated emission depletion (STED) microscopy system) includes an elongated optically transmissive medium having a set of regions including a core region, a trench region surrounding the core region, a ring region surrounding the trench region, and a cladding region, the set of regions having a doping profile providing a ?neff for vector modes in an LP11 mode group of greater than 1×10?4 in the visible spectral range so as to simultaneously guide stable Gaussian and orbital angular momentum (OAM) carrying modes at corresponding visible wavelengths.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: November 10, 2020
    Assignees: Trustees of Boston University, OFS FITEL, LLC
    Inventors: Siddharth Ramachandran, Lu Yan, Poul Kristensen
  • Patent number: 10816747
    Abstract: A guide tool device for an optical fiber includes a body having an adhesive passage between a proximal end and a flat distal end of the body. The passage communicates an adhesive supplied at the proximal end to an exit opening in the distal end. Each of a pair of fiber guide channels extends from the body to guide an optical fiber when aligned inside the channel, for relative movement over the exit opening in the distal end of the body during use of the device. A connector fixed on the proximal end of the body in communication with the passage, mates with a connector at the distal end of a syringe containing the adhesive. When urged by the syringe, the adhesive flows through the passage and out the exit opening in the distal end of the body, thereby coating the fiber when guided over the distal end during use.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: October 27, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Kelvin B Bradley, Xavier Chiron
  • Patent number: 10816720
    Abstract: A specialized, dispersion-controlled fiber is particularly configured to exhibit a relatively uniform dispersion (D) over a broad spectral range (for example, 1000 nm to 2000 nm). The specialized fiber exhibits an essentially constant attenuation (?) over this same spectral range so that the fiber is defined as having a high “figure of merit” (FoM) where FoM is defined as |D|/?. The specialized fiber is well-suited for use as a pulse stretcher, providing the ability to separate out wavelength constituents of an extremely short (fs, ps) broadband pulse into the ns range, for example.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: October 27, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Poul Kristensen, Philip G Westergaard
  • Patent number: 10809750
    Abstract: An optical probe includes an optical source that generates an optical beam that propagates from a proximal end to a distal end of an optical fiber that imparts a transformation of a spatial profile of the optical beam. An optical control device imparts a compensating spatial profile on the optical beam that at least partially compensates for the transformation of the spatial profile of the optical beam imparted by the optical fiber in response to a control signal from a signal processor. A distal optical source generates a calibration light that propagates through the one or more optical waveguides from the distal end to the proximal end of the optical fiber. An optical detector detects the calibration light and generates electrical signals in response to the detected calibration light.
    Type: Grant
    Filed: July 28, 2019
    Date of Patent: October 20, 2020
    Assignees: OFS Fitel, LLC
    Inventors: Eric Swanson, Tristan Kremp, Paul S. Westbrook, David DiGiovanni
  • Publication number: 20200319399
    Abstract: 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.
    Type: Application
    Filed: April 3, 2019
    Publication date: October 8, 2020
    Applicant: OFS Fitel, LLC
    Inventor: Brian Mangan
  • Patent number: 10788622
    Abstract: Embodiments of the invention include a hybrid or electro-optical cable. The cable includes an optical fiber having a core region and a cladding region formed around the core region, and at least one coating region formed around the optical fiber cladding region. The coating region includes at least one first electrically conductive carbon structure, at least one second electrically conductive carbon structure, and an electrically insulating material coupled between the first electrically conductive carbon structure and the second electrically conductive carbon structure. The cable provides optical energy transmission via the optical fiber. The cable also provides electrical energy transmission via the at least one first and second electrically conductive carbon structures.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: September 29, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Daniel Hendrickson, Valerie Anne Hill
  • Publication number: 20200292751
    Abstract: A hollow core optical fiber and cable combination is configured to exhibit minimal SNR and loss degradation. This is achieved by either: (1) reducing the coupling between the fundamental and other (unwanted) modes propagating within the hollow core fiber; or (2) increasing the propagation loss along the alternative. The first approach may be achieved by designing the cable to minimize perturbations and/or designing the hollow core fiber to fully separate the fundamental mode from the unwanted modes so as to reduce coupling into the unwanted modes. Whether through fiber design or cable design, the amount of light coupled into unwanted modes is reduced to acceptable levels. The second approach may be realized through either fiber design and/or cable design to suppress the light in unwanted modes so that an acceptably low level of light is coupled back into the fundamental mode.
    Type: Application
    Filed: May 18, 2020
    Publication date: September 17, 2020
    Applicant: OFS FITEL, LLC
    Inventors: David J. DiGiovanni, Daryl Inniss, Brian Mangan, Vitaly Mikhailov, John E. Pacini, Tristan Kremp
  • Publication number: 20200292774
    Abstract: A guide tool device for an optical fiber includes a body having an adhesive passage between a proximal end and a flat distal end of the body. The passage communicates an adhesive supplied at the proximal end to an exit opening in the distal end. Each of a pair of fiber guide channels extends from the body to guide an optical fiber when aligned inside the channel, for relative movement over the exit opening in the distal end of the body during use of the device. A connector fixed on the proximal end of the body in communication with the passage, mates with a connector at the distal end of a syringe containing the adhesive. When urged by the syringe, the adhesive flows through the passage and out the exit opening in the distal end of the body, thereby coating the fiber when guided over the distal end during use.
    Type: Application
    Filed: June 5, 2019
    Publication date: September 17, 2020
    Applicant: OFS Fitel, LLC
    Inventors: Kelvin B. Bradley, Xavier Chiron
  • Patent number: 10761288
    Abstract: A fiber optic cable connecter assembly includes a terminal wall having a port, an adapter at the port having one end for mating with a first fiber optic cable at the front of the wall and a second end for mating with a second cable at the back, and a spacer having an axial bore and a leading portion for engaging the port in sealing relationship. A cap has an axial bore, and a leading portion for engaging a rear portion of the spacer. A cable grommet/boot has a passage for receiving the first cable, and a leading end for engaging the rear portion of the spacer in sealing relationship. The rear portion of the grommet/boot protrudes from the back of the cap to act as a boot when the cap engages the spacer, after the first cable is connected to the adapter and the spacer engages the port.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: September 1, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Eric J Leichter, Denis E Burek
  • Publication number: 20200264059
    Abstract: Disclosed herein is an optical cable comprising a support; flexible protective tubes helically wound around the support, each flexible protective tube comprising an optical fiber comprising an optical core; a cladding disposed on the core; and a primary coating external to the cladding; and a deformable material surrounding the optical fiber; an outer jacket surrounding the flexible protective tubes; wherein each optical fiber is about 0.5% to about 1.
    Type: Application
    Filed: April 9, 2020
    Publication date: August 20, 2020
    Applicant: OFS Fitel, LLC
    Inventors: Robert S Dyer, Jie Li, John E Pacini, Brian Violette
  • Publication number: 20200264393
    Abstract: A length of optical fiber has a core, a cladding layer surrounding the core and a coating layer applied over the cladding layer along the fiber for protecting the fiber. The coating layer is applied so that gaps of a certain width are defined intermittently in the coating layer over the length of fiber. The gaps in the coating layer have a depth D that is set to expose the cladding layer enough within the gaps so that the exposed cladding layer and the surrounded core can be fusion spliced or terminated with minimal if any required stripping of the coating layer off of the cladding layer.
    Type: Application
    Filed: February 14, 2019
    Publication date: August 20, 2020
    Applicant: OFS Fitel, LLC
    Inventor: Eric J. Leichter
  • Patent number: 10745804
    Abstract: A torch for fabricating optical fiber preforms may include a body having a surface and two or more slit-shaped orifices oriented parallel or substantially parallel to each other along the surface. The torch body may further include two or more conduits connected to corresponding orifices. The torch may be used by orienting it relative to a preform substrate, and simultaneously emitting two or more gases from corresponding orifices toward the surface of the preform substrate, such that the gases are involved in a reaction to form a soot.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: August 18, 2020
    Assignee: OFS FITEL, LLC
    Inventor: Lazhar Mazlout
  • Patent number: 10746951
    Abstract: A tool device for installing an optical fiber inside a user premises includes a neck, a coupling joined to the neck for attachment to a leading end of an adhesive syringe or an extension pole, and a head joined to a leading portion of the neck. The head has a leading edge of a certain width, and a passageway for receiving an optical fiber and guiding the fiber to a position proximate to the leading edge. The width of the leading edge is such that when the edge is held transversely across a structural corner containing an adhesive bead, and an optical fiber is received in the passageway in the head and directed ahead of the leading edge, the edge embeds the fiber in the bead when the edge is swept along the corner with the optical fiber positioned between the edge and the adhesive bead.
    Type: Grant
    Filed: December 11, 2017
    Date of Patent: August 18, 2020
    Assignee: OFS FITEL, LLC
    Inventors: Kelvin B Bradley, Denis E Burek, Xavier Chiron, Jimmy Joy
  • Publication number: 20200257042
    Abstract: A hollow core fiber (HCF) has a cross section with a substantially-circular hollow core in a cladding lattice, an axial center and a reference direction that extends radially in one direction from the axial center. The HCF comprises modified holes that are located along linear paths that extend radially outward from the axial center. The modified holes, which are located at various radial distances from the axial center and at various azimuthal angles from the reference direction, have non-uniform modified properties. These non-uniform modified properties include radially-varying properties, azimuthally-varying properties, or a combination of radially-varying and azimuthally-varying properties.
    Type: Application
    Filed: April 24, 2020
    Publication date: August 13, 2020
    Applicant: OFS FITEL, LLC
    Inventors: Tristan Kremp, Brian Mangan, Robert S. Windeler
  • Patent number: 10739517
    Abstract: Systems for holding optical fibers in a predefined orientation and cleaving the optical fibers are shown. In one embodiment, the system comprises a substrate structure with a groove along the top surface of the substrate. The groove extends from the substrate front edge in a direction that is parallel to the orientation of an optical fiber and is dimensioned to receive a portion of a bare optical fiber. The substrate structure also comprises a transverse structure on the top surface, which crosses the groove at an angle. The transverse structure receives ultraviolet light (UV) curable material, which secures the end of the bare optical fiber within the groove. Securing the bare optical fiber allows for proper tension to be applied during cleaving.
    Type: Grant
    Filed: March 26, 2019
    Date of Patent: August 11, 2020
    Assignee: OFS FITEL, LLC
    Inventors: William R Holland, Robert Sienkowski
  • Patent number: 10739169
    Abstract: A distributed sensing optical fiber cable is proposed. An optical fiber is positioned at the center of the cable and includes a core region, at least one cladding layer surrounding the core region, a protective coating covering the at least one cladding layer, and a tight buffer of elastomeric thermoplastic material disposed to surround the protective coating. The remainder of the cable structure includes a pair of strength members disposed longitudinally on either side of the optical fiber (the strength members formed of a glass-based, memory-less material) and a hard plastic jacket formed to encase the optical fiber and the pair of strength members, the plastic jacket preferably exhibiting an essentially rectangular profile.
    Type: Grant
    Filed: October 25, 2017
    Date of Patent: August 11, 2020
    Assignee: OFS FITEL, LLC
    Inventors: John E Pacini, Brian Violette, Jacob Ulrik Petersen
  • Patent number: 10739543
    Abstract: A length of optical fiber has a core, a cladding layer surrounding the core and a coating layer applied over the cladding layer along the fiber for protecting the fiber. The coating layer is applied so that gaps of a certain width are defined intermittently in the coating layer over the length of fiber. The gaps in the coating layer have a depth D that is set to expose the cladding layer enough within the gaps so that the exposed cladding layer and the surrounded core can be fusion spliced or terminated with minimal if any required stripping of the coating layer off of the cladding layer.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: August 11, 2020
    Assignee: OFS FITEL, LLC
    Inventor: Eric J Leichter
  • Publication number: 20200231843
    Abstract: 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.
    Type: Application
    Filed: April 9, 2020
    Publication date: July 23, 2020
    Applicant: OFS Fitel, LLC
    Inventors: Debra A Simoff, Kenneth S Feder, Yaowen Li, Jacob Wrubel, Kenichi Suyama, Mei Wen
  • Publication number: 20200218026
    Abstract: A safety device for modules that store windings of communication lines, includes a metallic rod whose ends are configured to receive metallic screws to secure the rod on a base of a given module. End sections of the rod extend to a height at least equal to the height of the stored windings. Intermediate sections of the rod extend in opposite directions from the end sections, substantially parallel to the module base. Outer ends of the intermediate sections at least coincide with the outer periphery of the stored windings. A central section of the rod has opposite ends adjoining the outer ends of the intermediate sections. The central section rises over a path that at least coincides with the outer periphery of the stored windings. The end sections of the rod capture the windings, and the central section prevents them from dropping below the module during a building fire.
    Type: Application
    Filed: March 26, 2019
    Publication date: July 9, 2020
    Applicant: OFS Fitel, LLC
    Inventor: Roger A. Vaughn