With Graded Index Core Or Cladding Patents (Class 385/124)
  • Publication number: 20130195410
    Abstract: An optical waveguide, such as an optical fiber, which relies on a mechanism involving scattering in random structures to confine light to a region of the waveguide and allow propagation of electromagnetic radiation along the length of the waveguide includes an optically transmissive body having a length and a cross-section transverse to the length, wherein the optically transmissive body has refractive indices that are cross-sectionally random and substantially invariant along the length direction of the waveguide.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 1, 2013
    Inventors: Salman Karbasivalashani, Karl William Koch, III, Arash Mafi
  • Publication number: 20130195127
    Abstract: The laser light emitting device includes a glass rod having an input end and an output end. The glass rod has a core provided along the central axis thereof and a cladding covering the core. The refractive index of the core on the side of the input end is higher than the refractive index of the cladding. A value given through subtraction of the refractive index of the cladding from the refractive index of the core on the side of the output end is smaller than a value given through subtraction of the refractive index of the cladding from the refractive index of the core on the side of the input end.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 1, 2013
    Applicant: FUJIKURA LTD.
    Inventor: Shinichi Sakamoto
  • Publication number: 20130183014
    Abstract: An optical waveguide structure containing a plurality of core portions for transmitting light (L), in which adjacent core portions are arranged with substantially parallel central axes, and the optical paths of the light (L) that is transmitted through the adjacent core portions are in opposite directions, wherein each core portion has a tapered section in which the area of the cross-section in a direction substantially perpendicular to the central axis decreases gradually in the direction of the optical path of the light (L). A highly reliable electronic device containing the optical waveguide structure is also provided.
    Type: Application
    Filed: September 28, 2011
    Publication date: July 18, 2013
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventor: Shinsuke Terada
  • Publication number: 20130176839
    Abstract: A waveguide that includes a first cladding layer, the first cladding layer having an index of refraction, n3; a gradient index layer positioned adjacent the first cladding layer; an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2; a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1; and a second cladding layer, the second cladding layer having an index of refraction, n4, wherein n1 is greater than n2, n3, and n4; and n2 is greater than n3 and n4.
    Type: Application
    Filed: February 28, 2013
    Publication date: July 11, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: SEAGATE TECHNOLOGY LLC
  • Patent number: 8483534
    Abstract: An improved multimode fiber optic cable is provided. The improved multimode fiber optic cable includes, but is not limited to, a refractive index profile which is designed to compensate for a radially dependent wavelength distribution of laser launch modes coupled into the multimode fiber optic cable in order to minimize modal dispersion within the multimode fiber optic cable.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: July 9, 2013
    Assignee: Panduit Corp.
    Inventors: Gaston E. Tudury, Richard J. Pimpinella
  • Patent number: 8483533
    Abstract: Optical illuminators comprise optical fibers having a gradient index core and a cladding selected so that a refractive index difference at a core/cladding interface provides a numerical aperture less than, greater than, or equal to a numerical aperture of the gradient index core. In some examples, a maximum refractive index difference in the gradient index core is substantially the same as, less than, or greater than the refractive index difference at the core/cladding interface. Illuminators based on such fibers are configured to produce optical beams with a laser diode or diode array, and to provide stable, approximately Gaussian optical fluxes at a fiber output surface.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: July 9, 2013
    Assignee: nLight Photonics Corporation
    Inventor: Ronii Chris Mehl
  • Publication number: 20130170803
    Abstract: An optical waveguide including a first cladding layer; a core layer, including first and second core sections with cladding sections on sides thereof in the in-layer direction; and a second cladding layer. A refractive index distribution in the in-layer direction in the core layer, from the first core section to an adjacent cladding section, has a continuous change and a region with a first peak, a first dip, and a second peak in this order; the first peak at a position of the first core section, the second peak with a maximum value of refractive index smaller than of the first peak, at a position of the cladding section, and a portion, from the first cladding layer to the first core section, corresponded to a refractive index distribution in the layer-stacking direction, discontinuously changing at the boundary between the first cladding layer and first core section.
    Type: Application
    Filed: August 26, 2011
    Publication date: July 4, 2013
    Applicant: SUMITOMO BAKELITE CO., LTD.
    Inventors: Tetsuya Mori, Kimio Moriya
  • Publication number: 20130170802
    Abstract: The invention provides an optical waveguide and a method of making an optical waveguide. The waveguide has a curved section having an asymmetric refractive index profile, in which the refractive index varies asymmetrically across the waveguide cross-section in dependence on the radius of the curved section of the waveguide.
    Type: Application
    Filed: January 3, 2012
    Publication date: July 4, 2013
    Applicant: Xyratex Technology Limited
    Inventor: Richard C.A. PITWON
  • Publication number: 20130148934
    Abstract: Provided is an inexpensive low-loss optical fiber suitably used in an optical transmission network. An optical fiber includes a core, an optical cladding, and a jacket. The core has a relative refractive index difference between 0.2% and 0.32% and has a refractive index volume between 9%·?m2 and 18%·?m2. The jacket has a relative refractive index difference between 0.03% and 0.20%. Glass constituting the core has a fictive temperature between 1400° C. and 1560° C. Stress remaining in the core is compressive stress. A cutoff wavelength measured on a fiber having a length of 2 m is 1300 nm or more and a cutoff wavelength measured on a fiber having a length of 100 m is 1500 nm or less. An effective area at a wavelength of 1550 nm is 110 ?m2 or more. A attenuation at a wavelength of 1550 nm is 0.19 dB/km or less.
    Type: Application
    Filed: December 6, 2012
    Publication date: June 13, 2013
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: SUMITOMO ELECTRIC INDUSTRIES, LTD.
  • Publication number: 20130136407
    Abstract: According to some embodiments a single mode fiber includes: a germania doped central core region having outer radius r1 and relative refractive index ?1; and a cladding region comprising (i) a first inner cladding region having an outer radius r2>6 microns and relative refractive index ?2 and 0.3?r1/r2?0.85; and (ii) a second inner cladding region having an outer radius r3>9 microns and comprising a minimum relative refractive index ?3, wherein said second inner cladding region has at least one region with a relative refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the inner cladding region and comprising relative refractive index ?4, wherein ?1>?2>?3, ?3<?4.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 30, 2013
    Inventors: George Edward Berkey, Dana Craig Bookbinder, Steven Bruce Dawes, Ming-Jun Li, Pushkar Tandon, Ji Wang
  • Publication number: 20130136408
    Abstract: One embodiment of a single mode optical fiber includes: a graded index central core region having outer radius r1 and relative refractive index ?1; a cladding region comprising (i) a first inner cladding region having an outer radius r2<10 microns and relative refractive index ?2 and 0.65?r1/r2?1; (ii) and a second inner cladding region (i.e., trench) having an outer radius r3>10 microns and comprising a minimum relative refractive index ?3, wherein said second inner cladding region has at least one region with a relative refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the second inner cladding region and comprising relative refractive index ?4, wherein ?1>?2>?3, ?3<?4.
    Type: Application
    Filed: November 19, 2012
    Publication date: May 30, 2013
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Publication number: 20130136406
    Abstract: An optical fiber comprising: (I) a germania doped central core region having outer radius r1 and (II) a maximum relative refractive index ?1max and a cladding region including (i) a first inner cladding region having an outer radius r2>5 microns and refractive index ?2; (ii) a and a second inner cladding region having an outer radius r3>9 microns and comprising refractive index ?3; and (iii) an outer cladding region surrounding the inner cladding region and comprising refractive index ?4, wherein ?1max>?4, ?2>?3, and wherein 0.01%??4??3?0.09%, said fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and 0.25?r1/r2?0.85.
    Type: Application
    Filed: November 15, 2012
    Publication date: May 30, 2013
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon, James Andrew West
  • Publication number: 20130136404
    Abstract: Various apparatus and methods for reducing inter-core crosstalk in a multicore optical fiber are disclosed. A multicore optical fiber may include a plurality of cores capable of transmitting optical signals, and a cladding surrounding the cores, the cladding having a heterogeneous refractive index such that the optical signals propagate at different velocities in different ones of the cores. A multicore optical fiber may include a first length including cores having heterogeneous modal velocities and a second length, adjacent to the first length, including cores having heterogeneous modal velocities, and the cores in the first length are aligned with cores in the second length having a different modal velocity. Inter-core cross talk in a multicore optical fiber may also be reduced by transmitting optical signals through cores of a multicore optical fiber and pumping light into the cores to create unequal modal velocities in the cores.
    Type: Application
    Filed: November 30, 2011
    Publication date: May 30, 2013
    Applicant: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: Mark D. Feuer
  • Publication number: 20130136405
    Abstract: One embodiment of a single mode optical fiber includes: a graded index central core region having outer radius r1 and refractive index ?1; a cladding region comprising (i) a first inner cladding region having an outer radius r2<10 microns and refractive index ?2 and 0.65?r1/r2?1; (ii) and a second inner cladding region having an outer radius r3>10 microns and comprising a minimum refractive index ?3, wherein said second cladding region has at least one region with a refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the inner cladding region and comprising refractive index ?4, wherein ?1>?2>?3, ?3<?4.
    Type: Application
    Filed: May 31, 2012
    Publication date: May 30, 2013
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Publication number: 20130114934
    Abstract: According to at least one embodiment a graded index multimode fiber comprises: (i) a silica based core co-doped with GeO2 and 1 to 12 mole % P2O5; the core having a dual alpha, ?1 and ?2, where 1.8??1?2.4 and 1.9??2?2.4 at the wavelength (?) range between 840 and 1100 nm; and (ii) a silica based cladding region surrounding the core, wherein the fiber has a numerical aperture NA and 0.185?NA?0.25 (more preferably 0.185?NA?0.23). Preferably, the silica based cladding region surrounding the core has refractive index lower than that of pure silica.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 9, 2013
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Publication number: 20130114129
    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: Application
    Filed: June 27, 2011
    Publication date: May 9, 2013
    Applicant: NKT PHOTONICS A/S
    Inventor: Thomas Tanggaard Alkeskjold
  • Publication number: 20130114935
    Abstract: A graded index multimode optical fiber comprising: (a) a silica core doped with germania, and at least one co-dopant, comprising one of P2O5 or F or B2O3, the core extending to outermost core radius, r1 and having a dual alpha, ?1; (b) a low index inner cladding surrounding the core and off-set from said core; (c) an outer cladding surrounding and in contact with the inner cladding, such that at least the region of the inner cladding off-set from said core has a lower refractive index than the outer cladding. The center germania concentration at the centerline, CGe1, is greater than or equal to 0, and an outermost germania concentration in the core CGe2, at r1 is greater than or equal to 0. The core has a center co-dopant concentration at the centerline, Cc-d1, greater than or equal to 0, and an outermost co-dopant concentration Cc-d2, at r1, wherein Cc-d2 is greater than or equal to 0.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 9, 2013
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Publication number: 20130108218
    Abstract: A waveguide can have a first longitudinal section, with at least one core having a first refractive index and at least one sheath surrounding the core. The sheath can be made of a material having a second refractive index so the waveguide will guide at least one optical signal in the core. A third longitudinal section has a sheath and a coating surrounding the sheath having a third refractive index so the third longitudinal section of the waveguide will guide at least one optical signal in the sheath. A second longitudinal section, arranged between the first longitudinal section and the third longitudinal section being adapted to guide an optical signal from the core into the sheath.
    Type: Application
    Filed: August 2, 2012
    Publication date: May 2, 2013
    Inventor: Carl-Michael Weinert
  • Patent number: 8433166
    Abstract: A multi-core optical fiber 1A in which a plurality of cores can easily be identified even in the case where they are symmetrically arranged in its section has seven cores 10 to 16, a visual recognition marker 20, and a shared cladding 30 enclosing the seven cores 10 to 16 and the visual recognition marker 20. The cores 10 to 16 and the visual recognition marker 20 extend along the fiber-axis direction. The respective refractive index of the cores 10 to 16 is higher than the refractive index of the cladding 30. The refractive index of the visual recognition marker 20 differs from that of the cladding 30. In the cross-section perpendicular to the fiber-axis, the cores 10 to 16 are arranged such that they have 6-fold rotational symmetry and line symmetry. The visual recognition marker 20 is arranged at a position which breaks such symmetry.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: April 30, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takuji Nagashima, Toshiki Taru, Takashi Sasaki
  • Patent number: 8428411
    Abstract: The present invention embraces a single-mode optical fiber typically having reduced bending losses. The optical fiber includes a central core, an intermediate cladding, a buried trench, and an outer cladding. The optical fiber typically has (i), at a wavelength of 1310 nanometers, a mode field diameter with a nominal value of between about 8.6 microns and 9.5 microns (and a tolerance of ±0.4 micron), (ii) a cable cut-off wavelength of no more than 1260 nanometers, and (iii), for a bending radius of 15 millimeters at a wavelength of 1550 nanometers, bending losses of no more than 0.03 dB/turn.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: April 23, 2013
    Assignee: Draka Comteq, B.V.
    Inventors: Louis-Anne de Montmorillon, Simon Richard, Pierre Sillard
  • Patent number: 8428410
    Abstract: The present invention embraces a multimode optical fiber that includes a central core having an alpha-index profile, an inner cladding, a depressed trench, and an outer cladding (e.g., an outer optical cladding). Typically, the central core's alpha-index profile has a minimum refractive index at the central core's radius that corresponds to a refractive index difference with respect to the outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: April 23, 2013
    Assignee: Draka Comteq B.V.
    Inventors: Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, Koen de Jongh
  • Publication number: 20130094824
    Abstract: Provided is an extreme bending insensitive optical fiber. The optical fiber includes a core comprising a maximum refractive index difference ?n1 in the optical fiber, an inner layer comprising a refractive index difference ?n2 that is smaller than the maximum refractive index of the core and decreases in a direction away from the core, the inner layer being positioned outside the core, and a trench layer comprising an inner-circumference refractive index difference ?n3 that is smaller than the refractive index difference of the inner layer and an outer-circumference refractive index difference ?n4 that is a minimum refractive index difference in the optical fiber.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 18, 2013
    Inventors: Yeong-Seop Lee, Mun-Hyun Do, Si-Ho Song, Myung-Hwan Pyo, Dae-Hwan Oh, Won-Sun Lee, Dae-Seung Moon, Tae-Hyung Lee, Tae-Hun Kim
  • Patent number: 8419293
    Abstract: In one embodiment, an apparatus includes an optical fiber made of a silica-based material. A proximal end portion of the optical fiber has an outer-layer portion. The proximal end portion can be included in at least a portion of a launch connector configured to receive electromagnetic radiation. The apparatus also includes a component that has a bore therethrough and can be made of a doped silica material. The bore can have an inner-layer portion heat-fused to the outer-layer portion of the optical fiber. The component can also have an index of refraction lower than an index of refraction associated with the outer-layer portion of the optical fiber.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: April 16, 2013
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Jeffrey W. Zerfas, Paul Jortberg, Richard P. Tumminelli
  • Publication number: 20130084048
    Abstract: The present invention relates to a multi-mode optical fiber having a structure to reduce the numerical aperture at the emission end of the multi-mode optical fiber having a length for which practical use is assumed. The multi-mode optical fiber comprises a core portion, a trench portion, and a cladding portion. The multi-mode optical fiber is designed such that the numerical aperture at the emission end thereof is reduced as the fiber length increases, and moreover such that the numerical aperture of the multi-mode optical fiber having a length for which practical use is assumed satisfies a specific condition. By this means, the numerical aperture at the emission end of the multi-mode optical fiber can be kept small, and coupling efficiency of the multi-mode optical fiber with other optical components is drastically improved.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Itaru SAKABE, Kazuyuki Soma, Tomoyuki Hattori
  • Publication number: 20130083637
    Abstract: A waveguide that includes a first cladding layer, the first cladding layer having an index of refraction, n3; a gradient index layer positioned adjacent the first cladding layer; an assist layer positioned adjacent the gradient index layer, the assist layer having an index of refraction, n2; a core layer positioned adjacent the assist layer, the core layer having an index of refraction, n1; and a second cladding layer, the second cladding layer having an index of refraction, n4, wherein n1 is greater than n2, n3, and n4; and n2 is greater than n3 and n4.
    Type: Application
    Filed: September 29, 2011
    Publication date: April 4, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Chubing Peng
  • Publication number: 20130077926
    Abstract: According to some embodiments, a multimode optical fiber comprises a graded index glass core with refractive index ?1, a maximum refractive index delta ?1MAX, and a core radius between 10 and 40 microns; and cladding region surrounding the core comprising refractive index ?4, wherein the fiber exhibits an overfilled bandwidth at an operating wavelength in a 900 to 1250 nm wavelength range of greater than 2.5 GHz-km. According to some embodiments the fiber exhibits an overfilled bandwidth at a wavelength between 950 and 1100 nm which is greater than 4 GHz-km. According to some embodiments the fiber exhibits an overfilled bandwidth at a wavelength between 950 and 1100 nm which is greater than 10 GHz-km.
    Type: Application
    Filed: March 28, 2012
    Publication date: March 28, 2013
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Xin Chen, Ming-Jun Li, Pushkar Tandon
  • Patent number: 8406593
    Abstract: The present invention embraces an optical fiber that includes a central core having an alpha-index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. Typically, the alpha-index profile of the central core is interrupted at a point having a positive refractive index difference with respect to the outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: March 26, 2013
    Assignee: Draka Comteq B.V.
    Inventors: Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, Koen de Jongh
  • Patent number: 8406592
    Abstract: Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index which is spaced from the core at least 0.5 microns and less than 4 microns.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: March 26, 2013
    Assignee: Corning Incorporated
    Inventors: John Steele Abbott, III, Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Chukwuemeka Benneth Onuh, Kimberly Ann Wilbert
  • Publication number: 20130071115
    Abstract: An optical fiber comprising: (i) a core having a refractive index profile; (ii) an annular cladding surrounding the core; (iii) a primary coating contacting and surrounding the cladding, the primary coating having an in situ modulus of less than 0.35 MPa and an in situ glass transition temperature of less than ?35° C.; and (iv) a secondary coating surrounding the primary coating, the secondary coating having an in situ modulus of greater than 1200 MPa; wherein the refractive index profile of said core is constructed to provide an LP11 theoretical cutoff wavelength greater than 2.0 ?m and an effective area greater than 110 microns2 at 1550 nm.
    Type: Application
    Filed: September 6, 2012
    Publication date: March 21, 2013
    Inventors: Kevin Wallace Bennett, Scott Robertson Bickham, Andrey Evgenievich Korolev, Dmitri Vladislavovich Kuksenkov, Vladimir Nikolaevich Nazarov
  • Publication number: 20130071114
    Abstract: A few mode optical fiber suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The optical fiber has a graded-index core with a radius R1 in the range from 8 ?m to 14 ?m, an alpha value greater than or equal to about 2.3 and less than about 2.7 at a wavelength of 1550 nm, and a maximum relative refractive index ?1MAX from about 0.3% to about 0.6% relative to the cladding. The optical fiber also has an effective area greater than about 90 ?m2 and less than about 160 ?m2. The core and cladding support only the LP01 and LP11 modes at wavelengths greater than 1500 nm. The cladding has a maximum relative refractive index ?4MAX such that ?1MAX>?4MAX, and the differential group delay between the LP01 and LP11 modes is less than about 0.5 ns/km at a wavelength of 1550 nm.
    Type: Application
    Filed: March 14, 2012
    Publication date: March 21, 2013
    Inventors: Scott Robertson Bickham, Ming-Jun Li, Daniel Aloysius Nolan, Ji Wang
  • Publication number: 20130071079
    Abstract: Certain embodiments of the invention may include optimized trench-assisted ultra large area (ULA) optical fibers. According to an example embodiment of the invention, a trench-assisted optical fiber, optimized for microbending and figure-of-merit (FOM) performance is provided. The optical fiber includes a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions in the direction of said axis, the cladding region including an inner trench and an outer trench. The optical fiber further includes a core effective area (Aeff) of between 135 ?m2 and about 170 ?m2; a figure of merit (FOM) frontier distance less than about 0.8 dB; and a microbend frontier (MBF) distance of less than about 90%.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 21, 2013
    Applicant: OFS FITEL, LLC
    Inventors: David Wayne Peckham, Robert Lee Lingle
  • Publication number: 20130071082
    Abstract: The polarization maintaining optical fiber, or preform therefore, can be of the panda type with a pedestal based on a multi-component silica glass doped with a thermal-expansion-coefficient-reducing dopant which can counteracts the thermal-expansion-coefficient-increasing side-effect of the refractive index-increasing dopant, such that when the preform is drilled to make the stress member channel in a heterogeneous region having both a pedestal portion and a cladding portion, the thermal expansion coefficients are sufficiently close to manage damage which could otherwise be caused by uneven thermal expansion caused by drilling heat.
    Type: Application
    Filed: May 11, 2011
    Publication date: March 21, 2013
    Applicant: CORACTIVE HIGH-TECH INC.
    Inventors: Eric Gagnon, Christophe Lafond, Bertrand Morasse, Stéphane Chatigny
  • Publication number: 20130071081
    Abstract: Certain embodiments of the invention may include optimized trench-assisted ultra large area (ULA) optical fibers. According to an example embodiment of the invention, a trench-assisted optical fiber, optimized for figure-of-merit (FOM) performance, is provided. The optical fiber includes a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions in the direction of said axis.. The optical fiber further includes a core effective area (Aeff) of between 135 ?m2 and about 170 ?m2; and an index profile having a figure of merit (FOM) frontier distance less than about 0.7 dB.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 21, 2013
    Applicant: OFS FITEL, LLC
    Inventors: David Wayne Peckham, Robert Lee Lingle
  • Publication number: 20130071080
    Abstract: Certain embodiments of the invention may include optimized trench-assisted ultra large area (ULA) optical fibers. According to an example embodiment of the invention, a trench-assisted optical fiber, optimized for figure-of-merit (FOM) performance is provided. The optical fiber includes a core region having a longitudinal axis, a shelf region surrounding said core region, a cladding region surrounding said shelf region, said core and shelf and cladding regions configured to support and guide the propagation of signal light in a fundamental transverse mode in said core and shelf regions in the direction of said axis. The optical fiber further includes a core effective area (Aeff) of between 135 ?m2 and about 170 ?m2; a relative effective index difference (Neff) of greater than about 0.08%; a loss at 1550 nm of less than 0.185 dB/km; and an index profile having a figure of merit (FOM) frontier distance less than about 0.5 dB.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 21, 2013
    Applicant: OFS FITEL, LLC
    Inventors: David Wayne Peckham, Robert Lee Lingle
  • Publication number: 20130064514
    Abstract: A light source is coupled to an input facet that directs light from the light source to a core layer of a waveguide and a gradient index material layer disposed beside the core layer along a portion of a propagation length of the waveguide. Light is launched from the light source into the input facet. In response, the gradient index material layer directs light to the core layer at least along the portion of the propagation length.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 14, 2013
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Chubing Peng
  • Patent number: 8391661
    Abstract: A multimode optical fiber includes a central core having a graded-index profile with a delta value of about 1.9 percent or greater. The graded-index core profile has at least two different alpha parameter values along the core radius, namely a first value in an inner zone of the central core and a second value in an outer zone of the central core. The second alpha parameter value is typically less than the first alpha parameter value. The graded-index core profile and its first derivative are typically substantially continuous over the width of the graded-index core.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: March 5, 2013
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, Koen de Jongh
  • Publication number: 20130051747
    Abstract: A multimode optical fiber is drawn form an optical fiber preform, and during said drawing step, a series of perturbations are imparted to the fiber along the length of the optical fiber, said perturbations exhibiting a non-constant amplitude or repeat period.
    Type: Application
    Filed: August 22, 2011
    Publication date: February 28, 2013
    Inventor: Ming-Jun Li
  • Publication number: 20130051744
    Abstract: A method of classifying a graded-index multimode optical fiber includes taking a series of individual measurements at a single wavelength, and using the measurements to characterize the departure of the multimode optical fiber's actual index profile from the corresponding nominal index profile. The measurements, coupled with intermodal dispersion or EMB measurement, may be used to predict the approximate transmission properties of the optical fiber at wavelengths other than the measurement wavelength. It is desirable for a graded-index multimode optical fiber to possess, at a wavelength of 850 nanometers, a radial offset bandwidth of at least 6000 MHz·km for all radial offsets between 0 and about 70 percent of the radius of the optical fiber's core.
    Type: Application
    Filed: September 5, 2012
    Publication date: February 28, 2013
    Applicant: DRAKA COMTEQ B.V.
    Inventors: Asghar Gholami, Denis Molin, Pierre Sillard, Yves Lumineau
  • Patent number: 8385704
    Abstract: The present invention embraces an optical fiber that includes a central core having a graded-index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: February 26, 2013
    Assignee: Draka Comteq BV
    Inventors: Denis Molin, Pierre Sillard
  • Patent number: 8385702
    Abstract: Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular region, wherein the inner boundary of said depressed index region is an extension of the graded index core, the depressed region having a moat volume greater than 105%-um2.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: February 26, 2013
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 8385697
    Abstract: An optical fiber includes a cladding, a first core, and a second core. At least one of the first core and the second core is hollow and is substantially surrounded by the cladding. At least a portion of the first core is generally parallel to and spaced from at least a portion of the second core. The optical fiber includes a defect substantially surrounded by the cladding, the defect increasing a coupling coefficient between the first core and the second core.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: February 26, 2013
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Vinayak Dangui, Michel J. F. Digonnet, Gordon S. Kino
  • Patent number: 8385701
    Abstract: An optical fiber includes a central glass core region comprising maximum refractive index delta percent ?1, a first inner annular region surrounding said core comprising refractive index delta percent ?2, a depressed annular region surrounding said inner annular region and comprising ?3 and a third annular region surrounding the depressed annular region comprising refractive index delta percent ?4; wherein ?1MAX>?4>?2>?3. The difference between ?4 and ?2 is greater than 0.01 and profile volume, |V3| is at least 60% ??m2.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: February 26, 2013
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 8385703
    Abstract: Multimode optical fibers with a large core diameter and high numerical aperture are disclosed herein. Multimode optical fibers disclosed herein comprise a core region having a radius greater than 30 microns and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index. The depressed cladding region is surrounded by a titania doped cladding region. The fiber has a total outer diameter of less than 120 microns, and exhibits an overfilled bandwidth at 850 nm greater than 200 MHz-km.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: February 26, 2013
    Assignee: Corning Incorporated
    Inventors: Kevin Wallace Bennett, Scott Robertson Bickham, James A Derick, Percil Watkins
  • Publication number: 20130039626
    Abstract: An optical backplane system is provided. The optical backplane system includes at least one transceiver, at least one optical connector, and a plurality of multimode optical fibers coupled to the at least one optical connector. Each multimode optical fiber includes a graded index glass core having a diameter in the range of 24 microns to 40 microns, a graded index having an alpha less than 2.12 and a maximum relative refractive index in the range between 0.6 percent and 1.9 percent. The optical backplane further includes a cladding surrounding and in contact with the core. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.0 GHz-km at 1310 nm.
    Type: Application
    Filed: December 6, 2011
    Publication date: February 14, 2013
    Inventors: Scott Robertson Bickham, George Edward Berkey, Andrey Evgenievich Korolev, Ming-Jun Li, Nataliya A. Lobanova
  • Patent number: 8374474
    Abstract: A structure for optical fiber with single layer coating suitable for field termination process is provided, including a glass core, a cladding layer, and a permanent coating protective layer. The thickness of the permanent coating ranges preferably from about 4 um to 8 um, and remains on the optical fiber during the field termination process to provide protection to the optical fiber after the buffer layer is striped off. In addition, the optical fiber structure of the present invention still conforms to the specification of the standard optical fiber. The optical fiber of the structure according to the present invention can simplify the field termination process so that the quality efficiency of the deployment is improved.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: February 12, 2013
    Assignees: Prime Optical Fiber Corporation, OWLink Technology, Inc.
    Inventors: Kuei-Huang Chou, Shing-wu Paul Tzeng, Chih-Yu Wu, Sheng-Hsiang Hsu
  • Publication number: 20130034322
    Abstract: The invention relates to an optical waveguide and a semifinished product for producing an optical waveguide having optimized diffraction properties, comprising a trench structure that has a radius-dependent graded refractive index curve and/or a concentric depressed refractive index profile within a core zone (2) and/or within a cladding zone (4). In one embodiment of the optical waveguide and semifinished product, the structure is formed from a succession of differently doped regions containing dopants that are introduced into a base matrix and lower and/or increase the refractive index.
    Type: Application
    Filed: October 26, 2011
    Publication date: February 7, 2013
    Applicant: J-PLASMA GMBH
    Inventors: Matthias Auth, Jürgen Rosenkranz, Jörg Kotzing, Wolfgang Hämmerle, Lothar Brehm
  • Patent number: 8369672
    Abstract: Embodiments of the invention relate to a single-polarization fiber that may include a W-type refractive-index profile having a depressed region along an unguided principal axis of the fiber, and a quasi step-index profile along a guided principal axis of the fiber. The quasi step-index profile may have a depressed region with a radial extent at least twice that of the depressed region along the unguided axis.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: February 5, 2013
    Assignee: Verrillon, Inc.
    Inventors: William Jacobsen, Jeffrey Mayfield, Paula Fournier, David Bolte, Hussein Elmaola, Chih-Hao Wang, Gary Drenzek, Abdelouahed Soufiane
  • Patent number: 8369674
    Abstract: An optic device includes a multilayer zone forming a redirection section for redirecting and transmitting photons through total internal reflection, each multilayer zone including a high index material having a first real refractive index n1 and a first absorption coefficient ?1, a low index material having a second real refractive index n2 and a second absorption coefficient ?2, and a grading zone disposed between the high index material and the low index material and including a grading layer having a third real refractive index n3 and a third absorption coefficient ?3, wherein n1>n3>n2.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: February 5, 2013
    Assignee: General Electric Company
    Inventors: Susanne Madeline Lee, Peter Michael Edic
  • Patent number: 8367159
    Abstract: The application relates to methods for producing islands of functionality within nanoscale apertures. Islands of functionality can be produced by growing an aperture constriction layer from the walls, functionalizing the exposed base of the aperture, then removing the aperture constriction layer. The aperture constriction layer can be produced, for example, by anodically growing an oxide layer onto a cladding through which the aperture extends. The islands of functionality can be used to bind a single molecule of interest, such as an enzyme within the nanoscale aperture.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: February 5, 2013
    Assignee: Pacific Biosciences of California, Inc.
    Inventors: Jeremy Gray, Ronald L. Cicero, Annette Grot, Natasha Popovich, Stephen Dudek
  • Publication number: 20130028564
    Abstract: A trench-assisted, multimode optical fiber includes a central core having an alpha refractive index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth.
    Type: Application
    Filed: September 26, 2012
    Publication date: January 31, 2013
    Applicant: Draka Comteq B.V.
    Inventor: Draka Comteq B.V.