Patents Examined by Omar R Rojas
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Patent number: 11619784Abstract: Examples described herein relate to an optical device having a photonic-crystal lattice structure. In some examples, the optical device may include a substrate having a photonic-crystal lattice structure. The optical device may further include an optical waveguide formed in the photonic-crystal lattice structure and a defect cavity formed in the photonic-crystal lattice structure and optically coupled to the optical waveguide. Furthermore, the optical device may include a refractive index tuning structure adjacent to the defect cavity in the photonic-crystal lattice structure.Type: GrantFiled: July 29, 2021Date of Patent: April 4, 2023Assignee: Hewlett Packard Enterprise Development LPInventor: Mir Ashkan Seyedi
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Patent number: 11609390Abstract: Optical splitting adaptors and associated methods of manufacturing are provided. An example optical splitting adaptor includes a first connector housing that interfaces with a first optical transceiver having a first data rate, and the first connector housing accommodates a first type multi-fiber ferrule of a first number of fibers. The example optical splitting adaptor also includes a second connector housing that defines dual receptacles for interfacing with a second optical transceiver and a third optical transceiver, and the dual receptacles receive respective multi-fiber ferrules. The example optical splitting adaptor further includes a plurality of fibers operably connecting the first connector housing and the second connector housing such that, in operation, the plurality of fibers perform optical splitting between the first type multi-fiber ferrule of the first connector housing and the multi-fiber ferrules received by the dual receptacles of the second connector housing.Type: GrantFiled: January 29, 2021Date of Patent: March 21, 2023Assignee: Mellanox Technologies, Ltd.Inventors: Nimer Khazen, Alon Rokach
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Patent number: 11604314Abstract: A waveguide apparatus, comprises: disposed in at least one layer: an input coupler; a first fold grating; a second fold grating; an output coupler; and a source of light optically coupled to the waveguide providing at least first and second polarizations of the light and at least one wavelength. The input coupler is configured to cause the first polarization light to travel along a first total internal reflection (TIR) path and the second polarization light to travel along a second TIR path.Type: GrantFiled: December 7, 2020Date of Patent: March 14, 2023Assignee: DigiLens Inc.Inventors: Milan Momcilo Popovich, Jonathan David Waldern, Alastair John Grant
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Patent number: 11598924Abstract: An optical connector assembly having a connector housing with a first and second end. First end accepts a ferrule assembly, and second end accepts a retention assembly. There is a longitudinal bore from a distal to proximal end of connector. Bore accepts a POF optical fiber therein at distal end and fiber is inserted proximally until fiber bottoms-out at proximal end of ferrule. Retention body accepts one or more retention caps, or retention body contains at least one retention wing set to secure fiber to connector.Type: GrantFiled: July 20, 2021Date of Patent: March 7, 2023Assignees: Senko Advanced Components, Inc., Nitto Denko CorporationInventors: Kazumasa Okada, Yuichi Tsujita, Keita Kiyoshima, Kenji Iizumi, Yuki Nishiguchi, Kazuyoshi Takano
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Patent number: 11598922Abstract: There are provided an optical receptacle having an optical fiber including a first portion on another end surface side, a third portion on one end surface side, and a second portion between the first portion and the third portion; a core diameter at the first portion is smaller than the core diameter at the third portion; the core diameter at the second portion increases from the first portion side toward the third portion side; a first elastic member is provided between the optical fiber and an inner wall of a through-hole; a holder holds the another end surface side of a fiber stub; and the sleeve holds the one end surface side of the fiber stub.Type: GrantFiled: October 13, 2020Date of Patent: March 7, 2023Assignee: Adamant Namiki Precision Jewel Co., Ltd.Inventors: Sho Kondo, Hirotsugu Agatsuma, Satoshi Kaneyuki, Satoshi Hakozaki, Hiroki Sato, Kohei Tominaga
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Patent number: 11599005Abstract: A multi-section optical modulator and related method are disclosed wherein two waveguide arms traverse a plurality of successive modulating sections. A differential drive signal is applied separately to each waveguide arm of each modulating sections in synchronism with the transmission of light along the waveguide arms, effecting a dual differential driving of each section. By suitably selecting the number of modulating sections and the section length, a high modulation bandwidth and a high modulation efficiency may be achieved simultaneously for a given peak-to-peak voltage swing of the drive signal.Type: GrantFiled: August 9, 2021Date of Patent: March 7, 2023Assignee: Nokia Solutions and Networks OyInventors: Christopher Williams, Mostafa Ahmed, Alexander Rylyakov, Richard C. Younce, Yang Liu, Ran Ding, Abdelrahman Ahmed
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Patent number: 11598908Abstract: An interference filter module comprises two optical fiber collimators arranged on an optical axis so as to be opposed to each other, interference filters, and a casing including a main body portion and filter holding portions to be mounted into the main body portion, which are configured to hold the interference filters. Two interference filters including a kth filter when counted from a front end and a k-th filter when counted from a rear end are determined as a k-th set. The two interference filters of the k-th set are accommodated in two filter holding portions, each of which is a k-th holding portion when counted from the front end and the rear end, respectively. The two filter holding portions have rotation axes in directions orthogonal to a fore-and-aft direction and are rotatably held by the casing. The rotation axes of the filter holding portions are orthogonal to each other.Type: GrantFiled: November 6, 2018Date of Patent: March 7, 2023Assignee: KOHOKU KOGYO CO., LTD.Inventors: Toshihisa Okubo, Takashi Kato
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Patent number: 11579383Abstract: A waveguide including a multimode optical fiber joined to a structure for concentrating the guided modes spatially. The concentrating structure exhibits an adiabatic variation in its transverse dimension dpc in the direction of its exit face, and its transverse dimension dpc has a value dpc,in at least equal to a value dfc of the transverse dimension dfc of the core of the multimode optical fiber at the second face thereof.Type: GrantFiled: September 14, 2021Date of Patent: February 14, 2023Assignee: COMMISSARIAT A'LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventor: Jean-Michel Gerard
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Patent number: 11577984Abstract: A method for manufacturing an optical fiber preform includes: producing a core preform including a core portion made of transparent glass and a first cladding layer obtained by adding fluorine to the core portion; and forming, on an outer periphery of the first cladding layer, a second cladding layer made of glass having a refractive index higher than that of the first cladding layer. Further, a refractive index profile is formed in the first cladding layer due to a fluorine concentration profile, the refractive index profile being provided at least near a boundary surface with the second cladding layer and having a profile such that a refractive index difference between a refractive index of the first cladding layer and a refractive index of the second cladding layer decreases in accordance with a reduction in a distance from the boundary surface with the second cladding layer.Type: GrantFiled: July 8, 2020Date of Patent: February 14, 2023Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Mitsuhiro Kawasaki, Tomohiro Gonda
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Patent number: 11573379Abstract: Methods, devices, and systems for welding optical fibers and perforated elements by pulsed laser beam are provided. In one aspect, a method includes focusing a pulsed laser beam onto a region of a joining surface formed by an outer circumference of an optical fiber and an inner circumference of a hole of a perforated element, a beam direction of the pulsed laser beam running in an axial direction of the joining surface, and moving a laser focus of the pulsed laser beam in the region axially in or counter to the beam direction to produce at least one weld seam in the region. The optical fiber and the perforated element are locally melted in the region by the pulsed laser beam focused into a material of the optical fiber and a material of the perforated element and are thereby welded to one another.Type: GrantFiled: May 25, 2021Date of Patent: February 7, 2023Assignee: TRUMPF LASER GMBHInventors: Stefan Fuchs, Dominik Bauer, Michael Scharun, Helge Höck, Stefan Baumbach, Manuel Schindler, Maike Proßotowicz
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Patent number: 11567269Abstract: There are provided an optical receptacle having an optical fiber including a first portion on another end surface side, a third portion on one end surface side, and a second portion between the first portion and the third portion; a core diameter at the first portion is smaller than the core diameter at the third portion; the core diameter at the second portion increases from the first portion side toward the third portion side; a first elastic member is provided between the optical fiber and an inner wall of a through-hole; a holder holds the another end surface side of a fiber stub; and the sleeve holds the one end surface side of the fiber stub.Type: GrantFiled: October 13, 2020Date of Patent: January 31, 2023Assignee: Adamant Namiki Precision Jewel Co., Ltd.Inventors: Sho Kondo, Hirotsugu Agatsuma, Satoshi Kaneyuki, Satoshi Hakozaki, Hiroki Sato, Kohei Tominaga
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Patent number: 11569431Abstract: A CMOS-compatible actuator platform for implementing phase, amplitude, and frequency modulation in silicon nitride photonic integrated circuits via piezo-optomechanical coupling using tightly mechanically coupled aluminum nitride actuators is disclosed. The platform, which may be fabricated in a CMOS foundry, enables scalable active photonic integrated circuits for visible wavelengths, and the piezoelectric actuation functions without performance degradation down to cryogenic operating temperatures. A number of devices are possible, including ring modulator devices, phase shifter devices, Mach-Zehnder interferometer devices, directional coupler devices (including tunable directional coupler devices), and acousto-optic modulator and frequency shifter devices, each of which can employ the same AlN actuator platform. As all of these devices can be built on the same AlN actuator platform, numerous optical functions can be implemented on a single die.Type: GrantFiled: August 10, 2020Date of Patent: January 31, 2023Assignee: National Technology & Engineering Solutions of Sandia, LLCInventors: Matt Eichenfield, Andrew Jay Leenheer, Paul Stanfield
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Patent number: 11555957Abstract: A method of manufacturing a multicore fiber includes: an initial-preform forming process of forming an initial preform by arranging in an array a plurality of core rods each including a core portion and a cladding portion formed around outer periphery of the core portion; and an optical fiber manufacturing process of manufacturing an optical fiber from the initial preform. Further, the core rods include a plurality of holes, and the core rods are arranged in a manner that one hole is arranged between two core portion adjacent to each other in the initial-preform forming process.Type: GrantFiled: July 17, 2020Date of Patent: January 17, 2023Assignee: FURUKAWA ELECTRIC CO., LTD.Inventor: Kazunori Mukasa
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Patent number: 11555971Abstract: An apparatus and method herein efficiently couple spatial light to optical fiber light for achieving stability of an optical axis without a position sensor. The basic concept of the method includes: first, obtaining, according to a theoretical coupling efficiency model, a model parameter by means of fitting calculation; second, using a four-point tracking algorithm to calculate an optical fiber nutation trajectory according to the optical fiber nutation principle; and finally, using the nutation trajectory to calculate the position deviation of a central point. The optical axis is ensured to be stable by correcting the position deviation, and the high coupling efficiency remains. The method is used for the stability of the optical axis in a space coherent laser communication DPSK link. The high efficiency coupling is a key technology of long-distance, high bit rate transmission in space laser communication, and is significant in the development of inter-satellite optical communications.Type: GrantFiled: August 28, 2019Date of Patent: January 17, 2023Assignees: SHANGHAI INSTITUTE OF OPTICS AND FINE MECHANICS, CHINESE ACADEMY OF SCIENCES, SHANGHAI ZHONGKE SHENGUANG OPTOELECTRONICS INDUSTRY CO., LTD.Inventors: Peipei Hou, Jianfeng Sun, Zhiyong Lu, Yu Zhou, Yiqun Wang, Lijuan Wang, Yueli Xi
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Patent number: 11550103Abstract: An optical connection component includes an optical fiber; a high relative refractive-index difference optical fiber that is fusion-spliced to the optical fiber and has a greater relative refractive-index difference to a cladding of a core than the optical fiber; and an accommodating member accommodating the entire length of the optical fiber and the high relative refractive-index difference optical fiber, and has a first end face on which an end face of the optical fiber on the side opposite to the fusion-spliced side is exposed to be substantially flush with the first end face, and a second end face on which an end face of the high relative refractive-index difference optical fiber on the side opposite to the fusion-spliced side is exposed to be substantially flush with the second end face. The optical fiber and the high relative refractive-index difference optical fiber are fixed to the accommodating member.Type: GrantFiled: March 22, 2021Date of Patent: January 10, 2023Assignee: FURUKAWA ELECTRIC CO., LTD.Inventors: Masanori Takahashi, Mitsuhiro Iwaya, Masayoshi Tsukamoto
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Patent number: 11550105Abstract: A cable sealing device including an attaching part securable to the cable; a fixation part adapted to be mountable on the attaching part; and a sealing part. The attaching part includes outer locking faces. The fixation part has inner abutment faces adapted to co-operate with the outer locking faces to axially and rotationally lock the fixation part relative to the attaching part. The sealing part includes an inner seal and an outer seal. The sealing part also includes a second securing arrangement that is configured to engage a first securing arrangement of the fixation part to axially and rotationally lock the sealing part to the fixation part.Type: GrantFiled: April 6, 2020Date of Patent: January 10, 2023Assignee: CommScope Connectivity Belgium BVBAInventors: Dirk Kempeneers, Bart Vos, Kristof Vastmans, Danny Willy August Verheyden, Jos Paul G. Vandepoel
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Patent number: 11506856Abstract: Anchoring an input cable (190) at an input port (123, 223) of an enclosure (110) includes inserting the input cable (190) through an anchor member (151, 251) so that a cable jacket (191) terminates within the anchor member (151, 251) and at least one optical fiber (195) extends outwardly from the anchor member (151, 251). The anchor member (151, 251) is secured to the cable jacket (191) using the sheath (175). A cover (162, 260) is mounted to the anchor member (151, 251) to form a pass-through assembly (150, 250) defining an enclosed region. Material is injected into the enclosed region to fix strength members (197) and/or optical fibers (195) of the input cable (190) to the pass-through assembly (150, 250). The ruggedized pass-through assembly (150, 250) is disposed at a base (120, 220) of the enclosure (110).Type: GrantFiled: January 22, 2021Date of Patent: November 22, 2022Assignee: CommScope Connectivity Belgium BVBAInventors: Bart Mattie Claessens, Philippe Coenegracht
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Patent number: 11500158Abstract: Arrays of fiber pigtails can be used to project and receive light. Unfortunately, most fiber pigtail arrays are not aligned well enough for coherently combining different optical beams. This imprecision stems in part from misalignment between the optical fiber and the endcap spliced to the end of the optical fiber. The endcap is often polished, curved, or patterned, causing the light emitted by the endcapped fiber to refract or diffract as it exits the endcap. This refraction or diffraction shifts the apparent position of the beam waist from its actual position. Measuring this virtual beam waist position before and after splicing the endcap to the fiber increases the absolute precision with which the fiber is aligned to the endcap. This increase in absolute precision reduces the deviation in virtual beam waist position among endcapped fibers, making it easier to produce arrays of endcapped fibers aligned precisely enough for coherent beam combining.Type: GrantFiled: January 13, 2020Date of Patent: November 15, 2022Assignee: Massachusetts Institute of TechnologyInventors: Jason E. Langseth, Christopher Hwang, William Nowak, Daniel Miller, David Fouche, Joshua Olitzky
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Patent number: 11500171Abstract: The present invention relates to an optical fiber ribbon, comprising a plurality of adjacent optical fiber units extending in a longitudinal direction and arranged in parallel forming an optical fiber assembly having a width, each of the optical fiber units comprising either a single fiber or a group of at most three optical fibers, preferably two optical fibers, encapsulated with a matrix material; and a plurality of successive elongated rectilinear beads of a bonding material being arranged along a length of said assembly; each of said plurality of beads being configured to form an elongated bond between two adjacent optical fiber units of the plurality of optical fiber units; wherein a first bead forming a first bond connects a first pair of adjacent optical fiber units while the successive bond formed by the successive bead, connects a further pair of adjacent optical fiber units, wherein at least one optical fiber unit of the further pair differs from the optical fiber units of the first pair; wherein atType: GrantFiled: January 15, 2018Date of Patent: November 15, 2022Assignee: Prysmian S.p.A.Inventors: Ehsan Fallahmohammadi, Brian G. Risch, John R. Sach, Jeffrey Scott Barker, Clint Anderson
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Patent number: 11493684Abstract: An interferometric optical fibre sensor comprises optical fibre defining an optical circuit configured to propagate a first optical wave via an environment in which the optical fibre can be exposed to a stimulus that modifies the first optical wave, and a second optical wave, and to combine the first optical wave and the second optical wave to create an interference signal containing information about the stimulus, wherein optical fibre propagating either or both of the first optical wave and the second optical wave comprises hollow core optical fibre configured to propagate the optical wave or waves by an antiresonant optical guidance effect.Type: GrantFiled: August 5, 2019Date of Patent: November 8, 2022Assignee: University of SouthamptonInventors: Austin Taranta, Eric Numkam-Fokoua, Francesco Poletti, David Neil Payne