Having Plural Adjacent Fibers Or Rods Sheathed (i.e., Bundle) In Tube Or Enclosure Patents (Class 65/409)
  • Patent number: 9759866
    Abstract: An optical combiner 3 includes a plurality of incoming optical fibers 10, an outgoing optical fiber 20, and a plurality of bridge fibers 60, 50 provided between the plurality of incoming optical fibers 10 and the outgoing optical fiber 20, the plurality of bridge fibers 60, 50 being optically coupled to each other. In the bridge fibers 60, 50, a ratio of the outer diameter of a core 61, 51 to the outer diameter of a cladding 62, 52 is smaller in a bridge fiber located more apart from the incoming optical fiber 10.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: September 12, 2017
    Assignee: FUJIKURA LTD.
    Inventor: Hironori Tanaka
  • Patent number: 9604868
    Abstract: A preform manufacturing method of the present invention has a hole forming step of forming a plurality of holes in a glass body to produce a glass pipe, and a heating integration step of heating the glass pipe with core rods including core portions being inserted in the respective holes, thereby to implement integration of the core rods and the glass pipe. In the hole forming step, a peripheral hole out of the holes to be formed in the glass body is formed at a position determined in consideration of positional variation of the core portion before and after the integration.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: March 28, 2017
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Tetsuya Nakanishi, Toshiki Taru
  • Patent number: 9128253
    Abstract: The rotary connector is intended for use in the field of fiber optic communication and information transfer. The rotary optical cable connector includes a housing, in which two units with guide sleeves are arranged opposite one another, each having the ends of optical cables fastened therein. One of the units is able to rotate, and the other is fixed. A prism is situated between the guide sleeves, and retainers in the form of rods with a cruciform cross-section are secured in the sleeves. The optical cables are disposed in the recesses in the aforesaid retainers and the ends of the cables line up with gradient-index lenses. The rotary connector transmits four rotating light beams with minimal loss.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: September 8, 2015
    Assignees: Federal State Budgetary Institution <<Federal Agency for Legal Protection of Military, Special and Dual Use Intellectual Activity Results>> (FSBI <<FALPIAR>>), JOINT STOCK COMPANY <<Center VOSPI>>
    Inventor: Georgy Konstantinovich Makovets
  • Patent number: 9088129
    Abstract: A bridge fiber includes a core layer 31 and an outer layer 32 which has an index of refraction higher than that of the core layer 31 and covers the outer peripheral surface of the core layer 31. The outer layer 32 is surrounded by a substance such as the atmosphere having an index of refraction lower than an index of refraction n2 of the outer layer 32. An area AR1 of the outer layer 32 at one end face of the bridge fiber is an area that is to be optically coupled to an end face of a core of each of a plurality of pumping light inputting optical fibers, while an area AR2 of the core layer 31 at another end face of the bridge fiber is an area that is to be optically coupled to an end face of a core of an amplification optical fiber 40.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: July 21, 2015
    Assignee: FUJIKURA LTD.
    Inventor: Masahiro Kashiwagi
  • Publication number: 20150139587
    Abstract: A fibre coupler is provided, which includes a tubular enveloping structure and several optical fibres arranged in the enveloping structure, each of which has a fibre core and a fibre cladding surrounding same, in order to conduct laser radiation, and each of which extends from the first as far as the second end of the enveloping structure. The enveloping structure includes a tapering section which is tapered in a first direction from the first as far as the second end. In the tapering section, both a first ratio of the diameter of the fibre core to the diameter of the fibre cladding and also a second ratio of the diameter of the mode field of the laser radiation conducted in the optical fibre to the diameter of the fibre core, increases in the first direction for each optical fibre.
    Type: Application
    Filed: June 3, 2013
    Publication date: May 21, 2015
    Inventors: Marcin Kozak, Malte Kumkar, Peter Riedel, Hagen Zimer
  • Patent number: 8971684
    Abstract: Provided is a method of producing a preform 10P for a coupled multi-core fiber including: an arranging process P1 for arranging a plurality of core glass bodies 11R and a clad glass body 12R in such a way that the plurality of core glass bodies 11R are surrounded by the clad glass body 12R; and a collapsing process P2 for collapsing a gap between the core glass bodies 11R and the clad glass body 12R, wherein the respective core glass bodies 11R have outer regions 16 having a predetermined thickness from the periphery surfaces and made of silica glass undoped with germanium, and the clad glass body 12R is made of silica glass having a refractive index lower than a refractive index of the outer regions of the core glass bodies 11R.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: March 3, 2015
    Assignee: Fujikura Ltd.
    Inventors: Shoji Tanigawa, Katsuhiro Takenaga
  • Patent number: 8903214
    Abstract: A single-mode optical fiber for guiding an optical signal, wherein the core region is capable of guiding an optical signal in a fundamental core mode at an optical signal wavelength. A cladding region is arranged to surround the core region and includes an inner cladding region and an outer cladding region. The inner cladding region includes a background material and a plurality of inner cladding features arranged in the background material, wherein a plurality of the plurality of inner cladding features are of a first type of feature that includes an air hole surrounded by a high-index region comprising a high-index material that is larger than the refractive index of the inner cladding background material.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: December 2, 2014
    Assignee: NKT Photonics A/S
    Inventor: Thomas Tanggaard Alkeskjold
  • Patent number: 8818151
    Abstract: An novel fiber pump signal combiner is disclosed in which a fiber bundle array is coupled to a double-clad fiber with a taper section that is formed by etching a tapered outer surface into the cladding of a fiber rod to produce a high quality tapered outer surface free of defects with an inner core that has a constant diameter.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: August 26, 2014
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Benjamin G. Ward
  • Publication number: 20140226060
    Abstract: An electronic device includes a housing, a light emitting module, a light sensor and a lens. The light emitting module is disposed inside the housing and configured to emit a light out of the housing. The light sensor is disposed inside the housing and configured to receive an environmental light from outside of the housing. The lens, coupled with the housing, includes a first transparent portion, a second transparent portion and an opaque portion. The first transparent portion allows the light to be emitted out of the housing. The second transparent portion allows the environmental light to pass through, so that the light sensor receives the environmental light. The opaque portion is disposed between the first transparent portion and the second transparent portion. The first transparent portion, the second transparent portion and the opaque portion are integrated into a whole and made of the same material.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 14, 2014
    Applicant: HTC CORPORATION
    Inventor: Christopher Alan Porter
  • Publication number: 20140216109
    Abstract: A plurality of clad rods, and a clad tube, an arrangement process for arranging the plurality of core rods and the plurality of clad rods in a tube of the clad tube, in a state in which distances between center axes of the adjacent core rods become equal to each other and a state in which parts of outer circumferential surfaces in the adjacent rods contact, and an integration process for integrating the clad tube and the plurality of core rods and the plurality of clad rods arranged in the tube, wherein a ratio of a total cross-sectional area of a direction orthogonal to a length direction in the plurality of core rods and the plurality of clad rods with respect to an internal cross-sectional area of the tube of a direction orthogonal to a length direction in the clad tube is 0.84 or more.
    Type: Application
    Filed: February 3, 2014
    Publication date: August 7, 2014
    Applicant: FUJIKURA LTD.
    Inventors: Itaru Ishida, Shoichiro Matsuo
  • Patent number: 8769995
    Abstract: The present invention provides a method for making a multicore large diameter optical waveguide having a cross-section of at least about 0.3 millimeters, two or more inner cores, a cladding surrounding the two or more inner cores, and one or more side holes for reducing the bulk modulus of compressibility and maintaining the anti-buckling strength of the large diameter optical waveguide. The method features the steps of: assembling a preform for drawing a multicore large diameter optical waveguide having a cross-section of at least about 0.3 millimeters, by providing an outer tube having a cross-section of at least about 0.3 millimeters and arranging two or more preform elements in relation to the outer tube; heating the preform; and drawing the large diameter optical waveguide from the heated preform. In one embodiment, the method also includes the step of arranging at least one inner tube inside the outer tube.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: July 8, 2014
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Edward M. Dowd, Joseph J. Baraglia, Andrew S. Kuczma, Brian J. Pike, Thomas W. Engel, Martin A. Putnam
  • Publication number: 20130314940
    Abstract: Side emitting glass elements are provided that include a plurality of light guiding elements, which are inseparably connected to one another at their outer circumferential surfaces, and at least one scattering element. The scattering element is inseparably connected to the outer circumferential surface of at least one light guiding element. The light guiding elements have at least one glass with a refractive index n1, wherein the individual light guiding elements are not enclosed by a cladding. A phase boundary is present between the light guiding elements through which the guided light can pass and to reach the scattering element.
    Type: Application
    Filed: May 28, 2013
    Publication date: November 28, 2013
    Inventor: Hubertus RUSSERT
  • Publication number: 20130301999
    Abstract: Fiber optic devices, methods for producing same, and uses of such optical devices are provided. The method includes combining light conducting rods to form bundles in accordance with predefined rules with respect to a cross-sectional area and number thereof in relation to a surrounding sheath, and are subjected to a drawing process. The strong fiber rod produced by the drawing process has an approximately hexagonal outer shape, and due to the drawing process the light conducting rods also have an approximately hexagonal outer contour. Thereby, a high packing density of about 99% is achieved in the fiber rod. Through a further process sequence of bundling and drawing these fiber rods, high-resolution multi-fiber rods are produced that include several thousand light conducting rods, the diameter of an individual light conducting rod included therein being less than 100 ?m.
    Type: Application
    Filed: November 18, 2011
    Publication date: November 14, 2013
    Applicant: SCHOTT AG
    Inventor: Hubertus Russert
  • Publication number: 20130291603
    Abstract: An optical fiber preform, and method for fabricating, having a first core, a second core spaced from the first core and first and second regions, the first region having an outer perimeter having a first substantially straight length and the second region having an outer perimeter having a second substantially straight length facing the first straight length. One of the regions can comprise the first core and the other comprises the second core. The preform can be drawn with rotation to provide a fiber wherein a first core of the fiber is multimode at a selected wavelength of operation and a second core of the fiber is spaced from and winds around the first core and has a selected longitudinal pitch. The second core of the fiber can couple to a higher order mode of the first core and increase the attenuation thereof relative to the fundamental mode of the first core.
    Type: Application
    Filed: July 3, 2013
    Publication date: November 7, 2013
    Inventors: Douglas Guertin, Nils Jacobson, Kanishka Tankala, Adrian Carter
  • Publication number: 20130251317
    Abstract: A fiber optic assembly includes first and second fiber optic ribbons and a splice protector. Each of the first and second fiber optic ribbons includes a plurality of optical fibers coupled in a substantially flat arrangement, where the optical fibers are aligned side-by-side with one another. The optical fibers of the first ribbon are fusion spliced with the optical fibers of the second ribbon such that the spliced ribbons at the splice have a common lengthwise axis, widthwise axis orthogonal to the lengthwise axis, and thickness axis orthogonal to the lengthwise and widthwise axes. The splice protector supports the optical fibers of the first and second fiber optic ribbons that are spliced to one another at the splice. The splice protector includes an ultra-violet light (UV-) curable adhesive that provides a flexible support for the splice, and is at least half as flexible when cured over the splice as the first and second ribbons in bending about the widthwise axis.
    Type: Application
    Filed: June 7, 2012
    Publication date: September 26, 2013
    Inventors: Michael T. Faulkner, Lars K. Nielsen
  • Publication number: 20130239623
    Abstract: Methods for making active laser fibers include the production of an optical fiber with disturbed (or deviated) cylindrical symmetry on the glass surface of the fiber. The methods include a preform containing a central core made of glass. In one embodiment, the preform is circular and surrounded by additional glass rods and an outer glass jacket tube. In a first alternative embodiment, this preform is merged during fiber drawing. In a second alternative embodiment, the preform merged in a process forming a compact glass body with disturbed cylindrical symmetry. This compact preform is drawn into a fiber under conditions maintaining the disturbed cylindrical symmetry.
    Type: Application
    Filed: March 6, 2013
    Publication date: September 19, 2013
    Inventors: Jurgen Rosenkranz, Wolfgang Heammerle, Lothar Brehm, Katrin Roessner, Robert Hanf
  • Publication number: 20130209106
    Abstract: An optical transmission system includes: a multi-core optical fiber having a plurality of core portions. Signal light beams having wavelengths different from each other are caused to be input to adjacent core portions of the plurality of core portions. The adjacent core portions are the most adjacent to each other in the multi-core optical fiber.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 15, 2013
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventor: Furukawa Electric Co., Ltd.
  • Publication number: 20130183016
    Abstract: A multi-core optical fiber includes: a plurality of core portions; and a cladding portion positioned so as to surround each of the core portions, wherein each core portion includes a center core portion that has a refractive index greater than that of the cladding portion, a second core portion that is formed so as to surround the center core portion and that has a refractive index less than that of the center core portion, and a depressed portion that is formed so as to surround the second core portion and that has a refractive index less than those of the second core portion and the cladding portion, and an interval distance between the adjacent core portions is set such that optical cross-talk between the core portions for a total length of the multi-core optical fiber is equal to or less than ?30 dB at a wavelength of 1.55 ?m.
    Type: Application
    Filed: March 5, 2013
    Publication date: July 18, 2013
    Applicant: Furukawa Electric Co., Ltd.
    Inventor: Furukawa Electric Co., Ltd.
  • Patent number: 8468852
    Abstract: A method and an apparatus for making an optical fiber preform comprising the steps of (i) depositing a plurality of rods are deposited into an inner cavity of an apparatus; (ii) depositing particulate glass material in the inner cavity between the rods and the inner wall; and (iii) applying pressure against the particulate glass material to pressurize the particulate glass material against the plurality of rods.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: June 25, 2013
    Assignee: Corning Incorporated
    Inventors: Steven Bruce Dawes, Andrey V Filippov, Ming-Jun Li, Douglas H. Jennings, Valery A. Kozlov, Pushkar Tandon, Ji Wang
  • Patent number: 8425126
    Abstract: A multi-core optical fiber which has a plurality of core portions arranged separately from one another in a cross-section perpendicular to a longitudinal direction, and a cladding portion located around the core portions, the multi-core optical fiber comprises a cylindrical portion of which diameter is even, and a reverse-tapered portion gradually expanding toward at least one edge in the longitudinal direction, wherein a gap between each adjacent ones of the core portions in the reverse-tapered portion is greater than that in the cylindrical portion.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: April 23, 2013
    Assignee: Furukawa Electric Co., Ltd.
    Inventor: Katsunori Imamura
  • Publication number: 20130074551
    Abstract: The present invention, even in the case where the size of a preform itself is increased, enables production of a multi-core optical fiber in which cores are arranged with high accuracy. A plurality of core members each being rod-like are fixed by an array fixing member while a relative positional relation of the plurality of core members is fixed, and the plurality of core members and a cladding member are integrated into one piece, and thus a preform is obtained. By drawing the obtained preform, a multi-core optical fiber in which core arrangement is controlled with high accuracy is obtained.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 28, 2013
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Eisuke SASAOKA
  • Patent number: 8402791
    Abstract: A method of manufacturing microchannel plate according to an embodiment of the present invention includes: a first step of fabricating a multifiber having a polygonal cross-section by bundling a plurality of fibers; a second step of fabricating a microchannel plate base material by use of a plurality of the multifibers; and a third step of fabricating a microchannel plate out of the microchannel plate base material. The plurality of fibers include: a first fiber whose predetermined-thickness outer circumferential part surrounding a center part including a core is formed of a predetermined-component glass material; and a second fiber whose both center part including a core and outer circumferential part surrounding the same are formed of the predetermined-component glass material. The second fiber is arranged at, at least, one corner of a polygonal cross-section of the multifiber.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: March 26, 2013
    Assignee: Hamamatsu Photonics K.K.
    Inventor: Toshiyuki Uchiyama
  • Patent number: 8381548
    Abstract: A method of manufacturing a photonic band gap fiber base material includes: a forming step of continuously forming a columnar core glass body 10 and a clad glass body 20 which coats the core glass body to obtain an intermediate base material 110; a hole making step of making holes 30 in the clad glass body 20; an insertion step of inserting in the holes 30 a plurality of bilayer glass rods 40 in which an outer layer 42 which has the same refractive index as the clad glass body coats high refractive index portions 41 having a higher refractive index than a refractive index of the clad glass body 20; and a heating step of heating the intermediate base material 110 and integrating the intermediate base material 110 and the bilayer glass rods 40.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: February 26, 2013
    Assignee: Fujikura Ltd.
    Inventor: Katsuhiro Takenaga
  • Publication number: 20130044989
    Abstract: Provided is a method of producing a preform 10P for a coupled multi-core fiber including: an arranging process P1 for arranging a plurality of core glass bodies 11R and a clad glass body 12R in such a way that the plurality of core glass bodies 11R are surrounded by the clad glass body 12R; and a collapsing process P2 for collapsing a gap between the core glass bodies 11R and the clad glass body 12R, wherein the respective core glass bodies 11R have outer regions 16 having a predetermined thickness from the periphery surfaces and made of silica glass undoped with germanium, and the clad glass body 12R is made of silica glass having a refractive index lower than a refractive index of the outer regions of the core glass bodies 11R.
    Type: Application
    Filed: August 16, 2012
    Publication date: February 21, 2013
    Applicant: FUJIKURA LTD.
    Inventors: Shoji Tanigawa, Katsuhiro Takenaga
  • Publication number: 20120321260
    Abstract: A deterministic methodology is provided for designing optical fibers that support field-flattened, ring-like higher order modes. The effective and group indices of its modes can be tuned by adjusting the widths of the guide's field-flattened layers or the average index of certain groups of layers. The approach outlined here provides a path to designing fibers that simultaneously have large mode areas and large separations between the propagation constants of its modes.
    Type: Application
    Filed: June 16, 2011
    Publication date: December 20, 2012
    Inventors: Michael Joseph Messerly, Raymond John Beach, John Edward Heebner, Jay Walter Dawson, Paul Henry Pax
  • Patent number: 8202010
    Abstract: A connector component for optical fibers has good dimensional accuracy and parallelism. The connector component includes a base material. The base material is provided with at least two holes for inserting and fixing optical fibers therein. The base material is made of quartz glass. Inner components are arranged for forming holes for inserting optical fibers in a die for forming an outer form of the connector component with a dimensional accuracy equal to or less than 2 ?m. Slurry is poured into the die, the slurry including quartz powder, a resin binder, a dispersant, water and a curing agent. The poured slurry is cured and heated under vacuum so as to vitrify the cured slurry to obtain the quartz glass.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: June 19, 2012
    Assignee: Kohoku Kogyo Co., Ltd.
    Inventors: Futoshi Ishii, Shuhei Yoshizawa, Tamotsu Yajima, Haruhito Araki
  • Publication number: 20120144869
    Abstract: A method of incorporating within a glass optical waveguide a material of interest having a property of interest that would be neutralized by exposure to molten glass includes combining pieces of a light-transmissive first glass with the material of interest. The combined first glass and material of interest are shaped within a container and heated to a temperature sufficiently high to cause the glass pieces and material of interest to mutually coalesce and form a light-transmissive core rod, but not high enough that the first glass melts and neutralizes the property of interest. A cladding tube is heated and fused about the core rod to define a mono rod. An optical waveguide through which light propagates by internal reflection, and which incorporates the material of interest, is defined when the cladding tube comprises a glass that renders the cladding of lower refractive index than the core rod.
    Type: Application
    Filed: December 1, 2011
    Publication date: June 14, 2012
    Inventors: Kevin F. Tabor, Paige L. Higby
  • Patent number: 8196435
    Abstract: A method of manufacturing a holey fiber includes forming a preform and drawing the preform. The forming includes arranging a core rod at a center of a jacket tube and arranging capillary tubes having hollows around the core rod inside the jacket tube. The drawing includes heat melting the preform in a heating furnace while controlling at least one of a gas pressure to be applied to insides of the hollows of the capillary tubes, a temperature of the heating furnace, and a drawing speed, based on a structure of air holes to be formed in a first layer from the core region.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: June 12, 2012
    Assignee: The Furukawa Electric Co., Ltd.
    Inventor: Kazunori Mukasa
  • Publication number: 20120134637
    Abstract: A multi-core optical fiber includes: a plurality of core portions; and a cladding portion positioned so as to surround each of the core portions, wherein each core portion includes a center core portion that has a refractive index greater than that of the cladding portion, a second core portion that is formed so as to surround the center core portion and that has a refractive index less than that of the center core portion, and a depressed portion that is formed so as to surround the second core portion and that has a refractive index less than those of the second core portion and the cladding portion, and an interval distance between the adjacent core portions is set such that optical cross-talk between the core portions for a total length of the multi-core optical fiber is equal to or less than ?30 dB at a wavelength of 1.55 ?m.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 31, 2012
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventor: Katsunori IMAMURA
  • Publication number: 20110280532
    Abstract: The present invention relates to, for example, a method of easily manufacturing an optical fiber having any refractive index profile with fewer kinds of rods, and an optical fiber is manufactured by preparing a plurality of rods including at least two kinds of rods having different refractive indexes from each other, bundling rods selected from the plurality of rods to construct two or more rod units, producing a preform including a region in which the two or more rod units are combined so as to have a cross-sectional shape having rotational symmetry of order 2 or more, and manufacturing an optical fiber by drawing the preform.
    Type: Application
    Filed: May 16, 2011
    Publication date: November 17, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Eisuke SASAOKA
  • Patent number: 7900481
    Abstract: According to one embodiment a method of making optical fibers comprises: (i) manufacturing a core cane; (ii) situating a plurality of microstructures selected from rods, air filled tubes and glass filed tubes and placing said microstructures adjacent to the core cane, said microstructures forming no more than 3 layers; (iii) placing the core cane with said adjacent microstructures inside a holding clad tube; and (iv) placing interstitial cladding rods inside the holding (clad) tube, thereby forming an assembly comprising a tube containing a core cane, a plurality of microstructures and interstitial cladding rods. The assembly is then drawn into a microstructured cane and an optical fiber is drawn from the microstructured cane. According to several embodiments, the method of making an optical fiber includes providing at least one air hole and at least one stress rod adjacent to the core.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: March 8, 2011
    Assignee: Corning Incorporated
    Inventors: Michael Thomas Gallagher, Ming-Jun Li, Joseph Edward McCarthy, Ji Wang, Luis Alberto Zenteno
  • Patent number: 7881578
    Abstract: Techniques for ultra-high density connection are disclosed. In one embodiment, an ultra-high density connector includes a bundle of substantially parallel elongate cylindrical elements, where each cylindrical element is substantially in contact with at least one adjacent cylindrical element. Ends of the elongate cylindrical elements are disposed differentially with respect to each other to define a three-dimensional interdigitating mating surface. At least one of the elongate cylindrical elements has an electrically conductive contact positioned to tangentially engage a corresponding electrical contact of a mating connector.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: February 1, 2011
    Assignee: Raytheon Sarcos, LLC
    Inventors: Stephen C. Jacobsen, David P. Marceau, Shayne M. Zurn, David T. Markus
  • Patent number: 7861558
    Abstract: A method of making a multi-fiber assembly with irregular hexagonal array, which includes the steps of forming a plurality of primitives each made of a plurality of fibers, said fibers having cylindrical outer surfaces of same diameter and being arranged in an irregular hexagonal array, said irregular hexagonal array having six sides wherein three alternate sides of said primitive are each composed of n fibers and the other three alternate sides of said primitive 11 are each composed of n?1 fibers; and bringing together said primitives in such a way that sides with n fibers of said primitives are in contact with sides with n?1 fibers of other primitive thereby arranging said fibers at a central portion among said primitives in alignment with one another and therefore preventing said fibers at said central portion from squeezing one another.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: January 4, 2011
    Assignee: Taiwan Fiber Optics, Inc.
    Inventor: Chun-I Lu
  • Patent number: 7841213
    Abstract: A method for manufacturing a photonic crystal fiber including arranging a spacer formed of two or more spacer parts in a support tube such that the inner wall surface of the support tube has a substantially regular polygonal cross-sectional shape which allows closest packing of a core rod and a plurality of capillaries or the capillaries only; and forming a preform by packing in a support tube the core rod for forming a solid core and the capillaries for forming a cladding, or by providing a core space for forming a hollow core in a support tube and packing in the support tube a plurality of capillaries for forming the cladding; and drawing the preform into a fiber under heating.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: November 30, 2010
    Assignee: Mitsubishi Cable Industries, Ltd.
    Inventors: Takaharu Kinoshita, Nobusada Nagae, Akihiko Fukuda
  • Patent number: 7734137
    Abstract: A multicore optical fibre includes a microstructured cladding material formed from a plurality of cladding elements arranged in an array and each cladding element comprising at least two different materials each having different refractive indices, and a plurality of core elements formed within interstitial regions between adjacent cladding elements. A fibre so formed may have a large number of cores per unit cross-sectional area as compared with prior art fibres, and thus allows the fibre to have relatively short distances between adjacent cores for a given required inter-core isolation. A fibre so formed has utility in many areas requiring high core density, such as inter-chip optical communication, or optical communication between circuit boards.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: June 8, 2010
    Assignee: QinetiQ Limited
    Inventors: Charlotte R H Bennett, Terence J Shepherd, Laurent Michaille, David M Taylor
  • Patent number: 7730748
    Abstract: A method of manufacturing a collimator assembly is provided. The method includes placing a first core element within a first center collimator path of a first collimator tube to create a first base-tube couple. A couple cross-section of the first base-tube couple is reduced such that the first base-tube couple becomes a first single-fiber fiber. The first single-fiber fiber is assembled into a collimator group. The first core element is dissolved such that a first hollow fiber is generated.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: June 8, 2010
    Assignee: General Electric Company
    Inventor: Jiang Haochuan
  • Patent number: 7707854
    Abstract: A method of making an article having channels therethrough includes the steps of: providing a ductile structure defining at least one macro-channel, the macro-channel containing a salt; drawing the ductile structure in the axial direction of the at least one macro-channel to reduce diameter of the macro-channel; and contacting the salt with a solvent to dissolve the salt to produce an article having at least one microchannel.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: May 4, 2010
    Assignee: UT-Battelle, LLC
    Inventor: Brian R. D'Urso
  • Patent number: 7680377
    Abstract: Techniques for ultra-high density connection are disclosed. In one embodiment, an ultra-high density connector includes a bundle of substantially parallel elongate cylindrical elements, where each cylindrical element is substantially in contact with at least one adjacent cylindrical element. Ends of the elongate cylindrical elements are disposed differentially with respect to each other to define a three-dimensional interdigitating mating surface. At least one of the elongate cylindrical elements has an electrically conductive contact positioned to tangentially engage a corresponding electrical contact of a mating connector.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: March 16, 2010
    Assignee: Raytheon Sarcos, LLC
    Inventors: Stephen C. Jacobsen, David P. Marceau, Shayne M. Zurn, David T. Markus
  • Patent number: 7457499
    Abstract: A method and apparatus are described, which permit a simple, rapid manufacture of an end of an optical fiber bundle. According to the method a metallic sleeve is placed on an end section of the bundle, the end section with the sleeve on it is positioned in a shaping tool without pressing the sleeve and then pressure is exerted on the sleeve exclusively in a radial direction by press jaws of the shaping tool. In the optical fiber bundle made by the method the outer optical fibers (4?) of the optical fiber bundle (1) are embedded at least partially in the sleeve material. The apparatus for making the end of the bundle (1) with the sleeve (10) has a shaping tool (20) including at least two radially movable press jaws (22a-22f) that substantially surround the sleeve (10).
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: November 25, 2008
    Assignee: Schott AG
    Inventors: Hubertus Russert, Thomas Heinrich
  • Publication number: 20080267569
    Abstract: An optical cable for communication includes at least one retaining element blocked with respect to the water propagation as well as a process for manufacturing such an optical cable. The optical cable includes, in addition to the retaining element, at least two transmission elements housed within the retaining element and a water swellable yarn housed within the retaining element. The water swellable yarn is selected according to the following equation: V w V TF = k V t + R ( 1 ) in which VW is the volume of the water swellable yarn after swelling upon contact with water; VTF is the total free volume in the retaining element; k is a constant ?180; R is a constant ?1.4; and Vt is the free volume per each transmission element. Advantageously, the optical cable is water-blocked and the water swellable yarn does not induce microbending effects on the transmission elements.
    Type: Application
    Filed: November 5, 2004
    Publication date: October 30, 2008
    Inventors: Alessandro Ginocchio, Enrico Consonni, paolo Arturo Presa, Massimo Pizzorno, Mauro Maritano
  • Patent number: 7420147
    Abstract: A method of fabricating a multichannel plate is provided. The method includes providing a N layers, each layer having an array of wells formed therein. The N layers are aligned and stacked. The stack of N layers are sliced along a first and second line of the array of wells. The first line of the array of wells provides a first surface corresponding to a first array of channel openings of the MCP, and the second line of said array of wells provides a second surface corresponding to a second array of channel openings of the MCP. This method provides several functional benefits compared to conventional methods. These include, but are not limited to: the ability to produce well known and well characterized channels; the ability to produce well known and well characterized periods between channels; the ability to produce channels having any desired secondary electron emission enabling material therein; the ability to fabricate the substrate and/or final MCP of silicon.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: September 2, 2008
    Assignee: Reveo, Inc.
    Inventor: Sadeg M. Faris
  • Publication number: 20080205829
    Abstract: Techniques for ultra-high density connection are disclosed. In one embodiment, an ultra-high density connector includes a bundle of substantially parallel elongate cylindrical elements, where each cylindrical element is substantially in contact with at least one adjacent cylindrical element. Ends of the elongate cylindrical elements are disposed differentially with respect to each other to define a three-dimensional interdigitating mating surface. At least one of the elongate cylindrical elements has an electrically conductive contact positioned to tangentially engage a corresponding electrical contact of a mating connector.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 28, 2008
    Inventors: Stephen C. Jacobsen, David P. Marceau, Shayne M. Zurn
  • Publication number: 20080159702
    Abstract: An optical fibre having an axial direction and a cross section perpendicular to the axial direction, the optical fibre having a first light guiding fibre portion with a cladding region with a plurality of spaced apart cladding voids extending longitudinally in the fibre axial direction and a core region bounded by the cladding region, and a solid light transparent fibre portion having a first end facing the first light guiding fibre portion and a second end forming an end face of the optical fibre. The solid light transparent fibre portion provides a hermetic sealing of the cladding voids of the first light guiding fibre portion. A method of producing such an optical fibre and its use, such as an optical fibre connector and an article having a microstructured optical fibre with hermetically sealed end face, are also included.
    Type: Application
    Filed: December 17, 2007
    Publication date: July 3, 2008
    Inventors: Peter M.W. Skovgaard, Jacob Riis Folkenberg, Guillaume Vienne
  • Patent number: 7308807
    Abstract: A mesh (36) is placed around a bundle (32) of fused glass fibers. The bundle is then immersed in a leaching bath (44). The ends of the bundle are protected from the bath fluid by furrules (34). Some of the glass of the bundle is leached out, so as to provide a flexible fiber bundle.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: December 18, 2007
    Assignees: Carl-Zeiss Stiftung
    Inventors: Klaus Gerstner, Armin Plichta, Dirk Schlatterbeck, Michael Weisser, Peter Brix, Martin Sommer, Robert A. Rubino, Jr., Jeffrey A. Bonja, Richard Strack, Inka Henze, Paul Arsenault
  • Publication number: 20070266738
    Abstract: According to one embodiment a method of making optical fibers comprises: (i) manufacturing a core cane; (ii) situating a plurality of microstructures selected from rods, air filled tubes and glass filed tubes and placing said microstructures adjacent to the core cane, said microstructures forming no more than 3 layers; (iii) placing the core cane with said adjacent microstructures inside a holding clad tube; and (iv) placing interstitial cladding rods inside the holding (clad) tube, thereby forming an assembly comprising a tube containing a core cane, a plurality of microstructures and interstitial cladding rods. The assembly is then drawn into a microstructured cane and an optical fiber is drawn from the microstructured cane. According to several embodiments, the method of making an optical fiber includes providing at least one air hole and at least one stress rod adjacent to the core.
    Type: Application
    Filed: May 19, 2006
    Publication date: November 22, 2007
    Inventors: Michael Thomas Gallagher, Ming-Jun Li, Joseph Edward McCarthy, Ji Wang, Luis Alberto Zenteno
  • Patent number: 7272956
    Abstract: A multimode to low-mode optical fiber is constructed by forming a plurality of multimode optical fibers into a fiber bundle. The bundle is then selectively heated and drawn to form a bi-tapered fiber bundle having a central straight portion in which the multimode fibers are fused into a single length of fiber. During the drawing step, measures are taken to provide an aperture extending through the bi-tapered bundle, including the single straight portion of the bundle. An optical fiber having a low-mode or single-mode core is inserted through the aperture into the straight section of the bi-tapered bundle. The bi-tapered bundle and the low-mode core fiber are heated to a temperature at which cladding of the low-mode core fiber fuses to the straight portion of the bi-tapered bundle. The bi-tapered bundle is then cleaved in the straight portion to provide the multimode to low-mode optical fiber combiner. In one example, the multimode fiber bundle is formed around a metal wire before the drawing operation.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: September 25, 2007
    Assignee: Coherent, Inc.
    Inventors: Serguei G. Anikitchev, Kevin Elton Lindsay, Andrei Starodoumov
  • Patent number: 7266275
    Abstract: An optical fiber having a longitudinal direction and a cross-section perpendicular thereto, said fiber in a cross-section comprising: (a) a core region (11) having a refractive index profile with a highest refractive index nc, and (b) a cladding region comprising cladding features (10) having a center-to-center spacing, ?, and a diameter, d, of around 0.4? or larger, wherein nc, ? and d are adapted such that the fiber exhibits zero dispersion wavelength of a fundamental mode in the wavelength range from 1530 nm to 1640 nm; a method of producing such a fiber; and use of such an optical fiber in e.g. an optical communication system, in an optical fiber laser, in an optical fiber amplifier, in an optical fiber Raman amplifier, in a dispersion compensator, in a dispersion and/or dispersion slope compensator.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: September 4, 2007
    Assignee: Crystal Fibre A/S
    Inventors: Kim Per Hansen, Jacob Riis Folkenberg
  • Patent number: 7221837
    Abstract: The present invention provides a glass packing tube for use in fabricating a microchannel plate. The glass tube has a plurality of flat inner surfaces and is used to form a boule including a plurality of optical fibers located in the tube and a plurality of support rods between the first optical fibers and the flat surfaces whereby the tube, fibers and rods are fused together with reduced glass flow.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: May 22, 2007
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Thomas T. Mabry
  • Patent number: 7209615
    Abstract: A tapered fiber bundle is formed by first etching the end portions of each fiber within the group so as to remove a selected amount of outer cladding material from each fiber. The assembled, etched fibers are then fused together in conventional fashion to form a fiber bundle. By first etching the fibers to form a “tapered” structure, the core diameter of the tapered fiber bundle remains intact; in the prior art, the tapering process of drawing down the fused collection of fibers would reduce the core diameter. Preferably, the outer cladding of the central single mode fiber is modified to exhibit the same etch rate as the outer cladding layer of the remaining fibers.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: April 24, 2007
    Assignee: Fitel U.S.A. Corp.
    Inventor: Michael Fishteyn
  • Patent number: 7197217
    Abstract: A method of making a fiberoptic light guide utilizes a hollow glass cladding blackened by chemical reduction. The cladding has a predetermined lead content and is heated to an elevated temperature in an atmosphere of substantially 100% hydrogen gas in a furnace. The blackening step is accomplished before or after a bundle of optic fibers is inserted within the cladding and is drawn to produce a fused fiberoptic rod. The blackening step provides the cladding with a black opaque nature that inhibits the transmission of light transversely through the cladding.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: March 27, 2007
    Assignee: Sunoptic Technologies LLC
    Inventors: Harry Voyagis, Antonio Galarza, Bryant Thigpen