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WO2019017587A1 - Câble optique actif - Google Patents

Câble optique actif Download PDF

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Publication number
WO2019017587A1
WO2019017587A1 PCT/KR2018/006349 KR2018006349W WO2019017587A1 WO 2019017587 A1 WO2019017587 A1 WO 2019017587A1 KR 2018006349 W KR2018006349 W KR 2018006349W WO 2019017587 A1 WO2019017587 A1 WO 2019017587A1
Authority
WO
WIPO (PCT)
Prior art keywords
vcsel
array
optical
optical fiber
input end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2018/006349
Other languages
English (en)
Korean (ko)
Inventor
유태경
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lumens Co Ltd
Original Assignee
Lumens Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lumens Co Ltd filed Critical Lumens Co Ltd
Publication of WO2019017587A1 publication Critical patent/WO2019017587A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4202—Packages, e.g. shape, construction, internal or external details for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
    • G02B6/3803—Adjustment or alignment devices for alignment prior to splicing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements

Definitions

  • the present invention relates to an active optical cable, and more particularly, to an active optical cable, in which an active optical cable can be used for an active optical cable capable of efficiently coupling a maximum light intensity of a light beam emitted from a VCSEL (Vertical Cavity Surface Emitting Laser) Optical cable.
  • VCSEL Vertical Cavity Surface Emitting Laser
  • Copper cables which are generally used for signal transmission, are not suitable for high-capacity, high-quality voice and video signals (A / V signals) for long distance transmission.
  • AOC cable there is a photoelectric conversion part on a printed wiring board (PWB) or a printed circuit board (PCB) and an optical cable as a transmission medium .
  • PWB printed wiring board
  • PCB printed circuit board
  • An example of an AOC cable structure using a conventional vertical cavity surface emitting laser (VCSEL) array and a photodiode (PD) array is schematically illustrated in FIG.
  • VCSEL vertical cavity surface-emitting laser
  • VCSEL is a type of semiconductor laser diode that emits laser in the vertical direction to the upper surface.
  • Electric components and optical components are mounted on the PWB 16, which is not shown in detail in the drawings.
  • Electric parts and optical parts having both the transmitting and receiving functions can be mounted.
  • the electric parts and the optical parts having the transmitting and receiving functions can be respectively disposed on two different PWBs.
  • the transmission electric signal is input to the transmission driver IC 13 through the electric transmission line on the PWB, and the VCSEL element 11 is current-modulated, so that the optical signal can be outputted and transmitted through the optical cable 12.
  • the lens 14 is located and the light focused by the focusing lens 14 is converted by the prism 15 or the reflecting mirror 15.
  • the path-converted light travels through the plastic optical fiber 12, (20, Rx).
  • the photodiode 21 detects light traveling through the plastic optical fiber.
  • an active optical cable including: a VCSEL array having a plurality of VCSEL elements emitting a combined optical beam; Wherein the VCSEL array and the optical fiber are arranged such that the optical fiber is connected to the VCSEL array and the optical fiber, And the input end and the combined optical beam are coaxially aligned.
  • the active optical cable comprises a VCSEL mounting substrate for mounting the VCSEL array, a printed circuit board mounting a driver IC for driving the VCSEL elements, and allowing the VCSEL mounting substrate to be secured .
  • the VCSEL mounting substrate is fixed in a direction orthogonal to the printed circuit board.
  • the diameter of the combined optical beam emitting region may be the same as the diameter of the core of the optical fiber.
  • VCSEL elements adjacent to each other in the VCSEL array are spaced apart from each other by at least a reference interval, and the reference interval may be determined depending on the amount of light of adjacent VCSEL elements in the VCSEL array.
  • three VCSEL elements adjacent to each other in the VCSEL array may be spaced apart at equal intervals.
  • three VCSEL elements adjacent to each other in the VCSEL array may be arranged to form a triangle.
  • the four VCSEL elements adjacent to each other in the VCSEL array may be arranged in a shape of either a square shape or a rectangular shape.
  • an active optical cable including a plurality of VCSEL element groups, each of the VCSEL element groups including a plurality of VCSEL elements emitting a combined optical beam, And a plurality of optical fibers, each of the optical fibers corresponding to each of the VCSEL element groups and having an input end, and the input end of each of the optical fibers receives a combined optical beam from a corresponding group of VCSEL elements - and spaced apart from the VCSEL group array by a predetermined distance, and for efficient coupling of a combined optical beam emitted from a VCSEL element group corresponding to each of the input ends of the optical fibers and each of the optical fibers, , A VCSEL element group corresponding to each of the optical fibers and each of the optical fibers, The keombain de optical beam emitted from the VCSEL element group corresponding to each of the optical fibers, each of the input stage and the optical fiber and is arranged such that coaxial alignment (coaxially
  • the active optical cable comprises a VCSEL mounting substrate for mounting the VCSSEL group array, a printed circuit board (PCB) mounting a driver IC for driving the VCSEL elements, And the VCSEL mounting substrate is fixed in a direction orthogonal to the printed circuit board.
  • PCB printed circuit board
  • the diameter of the combined optical beam emitting region in each of the VCSEL groups may be equal to the diameter of the core of the corresponding optical fiber.
  • VCSEL elements adjacent to each other in each of the VCSEL groups are spaced apart from each other by at least a reference interval, and the reference interval may be determined depending on the light amount of VCSEL elements adjacent to each other in each of the VCSEL groups .
  • three VCSEL elements adjacent to each other in each of the VCSEL groups may be spaced apart at equal intervals.
  • three VCSEL elements adjacent to each other in each of the VCSEL groups may be arranged to form a triangle.
  • the four VCSEL elements adjacent to each other in each of the VCSEL groups may be arranged in any one of a square shape and a rectangular shape.
  • the present invention provides an AOC cable that not only eliminates the need to use lens and prism components in each of the transmitting or receiving ends, but also eliminates the need for a lens coupling operation to precisely align the core of the cable with the center of the VCSEL It is effective.
  • the light input to the input end of a plurality of optical fibers is not an optical beam emitted from one VCSEL element but a combined optical beam emitted from a plurality of VCSEL elements, the coupling operation can be facilitated .
  • AOC active optical cable
  • FIG. 2 is a diagram showing a characteristic part of an active optical cable according to an embodiment of the present invention
  • 3A and 3B are views for explaining a VCSEL array in an active optical cable according to an embodiment of the present invention
  • FIG. 4 is a view for explaining a VCSEL group array in an active optical cable according to an embodiment of the present invention
  • FIG. 5 is a view illustrating examples of arrangements of a plurality of VCSEL elements spaced correspondingly to an optical fiber in an active optical cable according to an embodiment of the present invention.
  • FIG. 3 is a view for explaining a VCSEL array in an active optical cable according to an embodiment of the present invention
  • FIG. 4 is a view for explaining a VCSEL array in an active optical cable according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a structure of a plurality of VCSEL elements arranged correspondingly to an optical fiber in an active optical cable according to an exemplary embodiment of the present invention, Fig.
  • the VCSEL used in the active optical cable of the present invention is basically made of GaAs or AlGaAs material, and is composed of an n-type DBR (Distributed Bragg Reflector) as a bottom mirror, a p-type DBR as a top mirror, And a gain region located between the n-type DBR and the p-type DBR. In this gain region, free photons are pumped to form a laser diode having an emission wavelength of approximately 650 nm to 1300 nm.
  • DBR distributed Bragg Reflector
  • an active optical cable includes a VCSEL array 110 and an optical fiber 120.
  • the VCSEL elements 130 constituting the VCSEL array 110 are mounted on the VCSEL mounting substrate 111.
  • a driver IC 190 for electrically connecting the VCSEL elements in the VCSEL array 110 to convert an electrical signal into an optical signal, and various wiring patterns and other components for electrical connection are mounted on a printed circuit board (160).
  • the VCSEL mounting substrate 111 is fixed to the printed circuit board 160, and a fixing member 180 may be used.
  • Other submounts and optical fiber guides may be provided on the printed circuit board 160 side, but are not shown as they are not essential components of the present invention.
  • a plurality of VCSEL elements 130a, 130b and 130c 130 are disposed in the VCSEL array 110 and a plurality of VCSEL elements 130 emits a combined optical beam 132.
  • a plurality of VCSEL elements 130 in the VCSEL array 110 are disposed correspondingly spaced apart from the optical fibers 120 and a combined optical beam 132 emitted from the plurality of VCSEL elements 130 is disposed on one optical fiber 120 . That is, the light emitted from each of the plurality of VCSEL elements 130 is combined to form a combined optical beam 132, and the combined optical beam 132 thus formed is incident on the input end 126 of the optical fiber 120) .
  • the optical fiber 120 has an input end 126 and a combined optical beam 132 from the VCSEL array 110 is input through the input end 126.
  • the beam 126 and the input end 126 of the optical fiber 120 are coupled such that they are coaxially aligned. More specifically, the center of the combined optical beam 132 emitted from the plurality of VCSEL elements 130 in the VCSEL array 110 (the center of the incident surface S1 having the diameter R1 in FIG. 2 or 3A) Is coaxially aligned with the center of the core 122 located at the center of the input end 126 of the optical fiber 120 (the center of the cross section of the core having the diameter R2 in Fig.
  • the combined optical beam 132 and the optical fiber 120 are configured to be coaxially aligned.
  • the incident surface S1 may be represented by a circle circumscribing the beams emitted by each of the VCSEL elements 130, as shown in FIG.
  • the combined optical beam 132 has a predetermined diameter R1.
  • the combined optical beam emitted by the plurality of VCSEL elements 130 is input to the input end 126 side of the optical fiber 120.
  • the combined optical beam 132 (S1 in FIG. 3A) is defined as the combined optical beam emitting region
  • the diameter R1 of the combined optical beam emitting region (S1 in FIG. 3A) is equal to the diameter R2 of the core 122 of the optical fiber
  • Reference numeral 124 denotes a cladding layer of the optical fiber 120.
  • adjacent VCSEL elements (e.g., 130a and 130b) in the VCSEL array 110 are spaced apart from each other by at least a reference interval.
  • the reference spacing can be determined depending on the amount of light of the VCSEL elements (e.g., 130a and 130b) that are adjacent to each other in the VCSEL array 110.
  • the spacing of the VCSEL elements in the VCSEL array 110 may be determined by considering the size of the VCSEL elements or the pitch width of the upper electrode wiring (p-type electrode wiring).
  • the incident surface S1 of the VCSEL elements 130 that is, the combined optical beam emitting region can be bounded by a combination of the emitted light of each of the VCSEL elements as mentioned above,
  • the combined optical beam emission region has a diameter R1.
  • the center of the optical fiber core is substantially aligned with the center of the combined optical beam emitting region (see C1, C2, and C3 in FIG. 5)
  • the combined optical beam and the input end 126 of the optical fiber 120 can be efficiently coupled.
  • the coupling operation between the core portion of the optical fiber and the optical beam becomes much more errory, and the present invention can overcome this disadvantage .
  • the VCSEL mounting substrate 111 may be coupled to the printed circuit board 160 in a direction orthogonal to the VCSEL mounting substrate 111. As shown in FIG. 1, the substrate 16 and the VCSEL array are parallel to each other. In the active optical cable of the present invention, the printed circuit board 160 and the VCSEL array are orthogonal to each other.
  • the conventional type can be regarded as a horizontal type
  • the present invention can be regarded as a vertical type.
  • FIG. 5 is a view illustrating examples of arrangements of a plurality of VCSEL elements spaced correspondingly to an optical fiber in an active optical cable according to an embodiment of the present invention.
  • (a) shows a case where three VCSEL elements 130a, 130b and 130c are arranged in a regular triangle in a VCSEL array
  • (b) and (c) show four VCSEL elements 130d, 130e, 130f and 130g
  • (B) is a structure arranged in a square
  • (c) is a structure arranged in a rectangle.
  • S2 and S3 are the incident faces incident on the core side of the optical fiber and C1, C2 and C3 are the center of each of the incident faces S1, S2 and S3, to be.
  • the centers of these incident planes coaxially align with the center of the core 122 of the optical fiber.
  • the incident planes S1, S2, and S3 are represented by a circumscribed circle drawn so as to include all the optical beams emitted from the respective VCSEL elements as shown in the figure, and the centers of these incident planes Coaxially aligned to coincide with the center of the cross section of the core of the optical fiber.
  • reference numerals 132a to 132k denote outer edges of the optical beams emitted from the respective VCSEL elements.
  • d4 is an interval wider than the reference interval d3.
  • the VCSEL array and the core of the optical fiber are coaxially aligned, and the diameter of the incident surface, that is, the diameter of the combined optical beam, is equal to the diameter of the core of the optical fiber between the incident surface of the VCSEL array and the optical fiber So as to be located at a predetermined position.
  • a plurality of VCSEL elements may be appropriately arranged in various forms in the VCSEL array to form a combined optical beam as shown in FIGS. 5A, 5B, and 5C, Is determined by the amount of light of adjacent VCSELs (e.g., 130a and 130b, or 130d and 130e, or 130h and 130i). Further, the present invention is not limited to the example shown in FIG. 5, but a larger number of VCSEL elements can be arranged in a more extended structure with such a structure as a unit unit.
  • the active optical cable of the present invention is capable of inputting the combined optical light emitted by a plurality of VCSEL elements to one optical fiber as in the above-described example, and further, in the embodiment described with reference to FIG. 4
  • the VCSEL element groups may be spaced apart from the optical fiber bundles 120a, 120b, 120c and 120d and correspond to the optical fibers in the optical fiber bundles 120a, 120b, 120c and 120d.
  • Each of the VCSEL element groups 110a, 110b, 110c, and 110d includes a plurality of VCSEL elements that emit a combined optical beam.
  • An example of one VCSEL element group 110a may be the structure shown in FIG.
  • the optical fiber bundle has a plurality of optical fibers 120a, 120b, 120c, and 120d and is spaced apart from the corresponding VCSEL group array at predetermined intervals.
  • Each of the optical fibers 120a, 120b, 120c, and 120d corresponds to each of the VCSEL element groups.
  • Each of the optical fibers has an input end, and the input end receives a combined optical beam from the corresponding group of VCSEL elements.
  • the VCSEL element groups 110a, 110b, 110c, and 110d are shown mounted on the respective VCSEL mounting substrates, but they may be mounted on one VCSEL mounting substrate, And can be fixed in a vertical type on the printed circuit board 160 using the fixing member 180, as shown in Figs.
  • optical fiber in the optical fiber bundle and the corresponding VCSEL element group is substantially the same as the VCSEL array and optical fiber described above with reference to Fig. As well as.
  • the optical cables in the optical fiber bundle in Fig. 4 are illustrated as four, they may be extended in different numbers and may be arranged in a matrix as well as a structure arranged in a row or in a row. In this arrangement, a plurality of VCSEL elements in the VCSEL element group corresponding to one optical fiber may be used.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un câble optique actif. Le câble optique actif comprend un réseau VCSEL ayant une pluralité d'éléments VCSEL émettant un faisceau optique combiné ; et une fibre optique dont une extrémité d'entrée permet de recevoir le faisceau optique combiné provenant du réseau VCSEL, l'extrémité d'entrée étant espacée du réseau VCSEL selon un intervalle prédéfini et permet un couplage efficace de l'extrémité d'entrée de la fibre optique et du faisceau optique combiné, le réseau VCSEL et la fibre optique étant agencés de sorte que l'extrémité d'entrée et le faisceau optique combiné soient alignés coaxialement.
PCT/KR2018/006349 2017-07-19 2018-06-04 Câble optique actif Ceased WO2019017587A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170091751A KR20190009664A (ko) 2017-07-19 2017-07-19 액티브 광 케이블
KR10-2017-0091751 2017-07-19

Publications (1)

Publication Number Publication Date
WO2019017587A1 true WO2019017587A1 (fr) 2019-01-24

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PCT/KR2018/006349 Ceased WO2019017587A1 (fr) 2017-07-19 2018-06-04 Câble optique actif

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WO (1) WO2019017587A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765948B2 (en) * 2001-01-09 2004-07-20 Applied Optoelectronics, Inc. VCSEL assembly with edge-receiving optical devices
KR20090101104A (ko) * 2008-03-21 2009-09-24 주식회사 휘라 포토닉스 광섬유 정렬을 위한 모듈 제작 방법 및 그를 위한 광 전송 장치
US20120251045A1 (en) * 2011-03-31 2012-10-04 International Business Machines Corporation Multi-core fiber optical coupling elements
US20130266326A1 (en) * 2009-02-17 2013-10-10 Trilumina Corporation Microlenses for Multibeam Arrays of Optoelectronic Devices for High Frequency Operation
US20140139467A1 (en) * 2012-11-21 2014-05-22 Princeton Optronics Inc. VCSEL Sourced Touch Screen Sensor Systems

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765948B2 (en) * 2001-01-09 2004-07-20 Applied Optoelectronics, Inc. VCSEL assembly with edge-receiving optical devices
KR20090101104A (ko) * 2008-03-21 2009-09-24 주식회사 휘라 포토닉스 광섬유 정렬을 위한 모듈 제작 방법 및 그를 위한 광 전송 장치
US20130266326A1 (en) * 2009-02-17 2013-10-10 Trilumina Corporation Microlenses for Multibeam Arrays of Optoelectronic Devices for High Frequency Operation
US20120251045A1 (en) * 2011-03-31 2012-10-04 International Business Machines Corporation Multi-core fiber optical coupling elements
US20140139467A1 (en) * 2012-11-21 2014-05-22 Princeton Optronics Inc. VCSEL Sourced Touch Screen Sensor Systems

Also Published As

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