WO2017006445A1 - Module émetteur-récepteur optique et dispositif d'informations l'utilisant - Google Patents

Module émetteur-récepteur optique et dispositif d'informations l'utilisant Download PDF

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Publication number
WO2017006445A1
WO2017006445A1 PCT/JP2015/069580 JP2015069580W WO2017006445A1 WO 2017006445 A1 WO2017006445 A1 WO 2017006445A1 JP 2015069580 W JP2015069580 W JP 2015069580W WO 2017006445 A1 WO2017006445 A1 WO 2017006445A1
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Prior art keywords
optical
optical waveguide
core
light emitting
cores
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PCT/JP2015/069580
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English (en)
Japanese (ja)
Inventor
一男 石山
康信 松岡
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株式会社日立製作所
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Priority to PCT/JP2015/069580 priority Critical patent/WO2017006445A1/fr
Priority to JP2017527020A priority patent/JP6471229B2/ja
Publication of WO2017006445A1 publication Critical patent/WO2017006445A1/fr

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    • 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
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • 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 optical transmission / reception module that enables large-capacity signal processing between signal transmission / processing devices, and an information device using the same.
  • Interconnect technology can be divided into inter-device transmission, intra-device transmission (backplane), and inter-chip transmission according to the signal transmission distance.
  • Electric transmission has been used for both transmissions, but with the increase in required transmission speed, optical interconnect technology has begun to be introduced from transmission between devices with a long transmission distance.
  • transmission loss increases dramatically, making it difficult to increase the transmission distance.
  • the transmission speed and transmission distance have been increased by applying low dielectric constant substrates and additional circuits such as pre-emphasis and equalizer, but even with these technologies, transmission speed and transmission equivalent to backplane transmission have been achieved.
  • Each distance is said to be the limit of electric transmission of 10 Gbps (Non-patent Document 1).
  • the transmission capacity of the backplane that connects the internal routers of backbone routers and large-scale servers exceeds 1 Tbps in 2008, and is expected to increase 1.5 times a year in the future. After 2015, transmission technology exceeding 25 Gbps is required, and the bandwidth limit of the electric backplane becomes serious.
  • backplane opticalization technology optical backplane technology
  • the loss due to the reflection of light and the transmission loss are also very easy to control because the frequency dependence is very small. In this way, opticalization of high-frequency transmission lines has the potential for large-capacity transmission compared to conventional electrical transmission, and development related to optical interconnect technology (optical transceiver modules, optical fiber wiring) has become active. ing.
  • Optical transceiver modules for optical interconnects drive optical subassemblies, light emitting / receiving elements, optical connectors that enable optical coupling of light emitting / receiving elements and optical transmission media (optical fiber or optical waveguide), and light emitting / receiving elements It is composed of an electronic circuit and an electrical connector for electrically connecting the electronic circuit and the board in the apparatus.
  • the optical transmission / reception module is mounted after being electrically connected to the in-device board (herein, the in-device boat indicates an interface board in the transmission device and a switch board such as a switch LSI).
  • This optical subassembly includes a laser diode that emits an optical signal, a light emitting / receiving element of a photodiode that converts the optical signal into an electrical signal, and a laser driver electronic circuit that drives the laser diode to convert the optical signal into an electrical signal
  • a transimpedance electronic circuit for amplifying an electric signal from the photodiode is mounted on the electric wiring board.
  • the transmission capacity of the optical interconnect will also increase.
  • there are methods such as 1) increasing the transmission speed per channel, 2) using the wavelength multiplexing method, and 3) using the spatial multiplexing method.
  • a multi-core fiber is an optical fiber in which a plurality of cores exist in a common clad (that is, in one core).
  • the maximum cladding diameter is less than twice the diameter of conventional optical fiber. Therefore, in addition to the increase in transmission capacity due to spatial multiplexing, the space utilization efficiency is high and a large number of optical fibers are wired in a narrow space. Valid in the interconnect. In addition, it is highly flexible and is particularly effective in case of internal wiring.
  • the light emitting / receiving elements are arranged in accordance with the core arrangement (concentric circle) of the multi-core fiber.
  • the multi-core fiber and the light emitting / receiving element are optically coupled by a butt joint method (butting method) (Non-patent Document 3).
  • a grating coupler optically connected to the optical waveguide and the light emitting / receiving element is arranged in accordance with the core arrangement of the multicore fiber.
  • the optical coupling between the multi-core fiber and the grating coupler is taken by the butt joint method (Patent Document 1).
  • Patent Document 4 As another spatial multiplexing method, a conventional multicore connector in which optical fibers having a single core are two-dimensionally arranged (usually 12-core optical fibers are arranged in one stage, so the total number of optical fibers in the case of n stages is There is a method using a number of cores of 12 ⁇ n). In this case, the optical waveguide becomes multi-stage (laminated), and the distance between the optical waveguide and the light emitting / receiving element increases, so there is a problem that the optical coupling efficiency deteriorates.
  • Patent Document 4 and a system using a multi-core optical path conversion connector (Non-Patent Document 5) have been proposed.
  • the optical transceiver module for optical interconnects equipped with the two types of conventional multi-core fibers described in [Background Technology] has the following problems.
  • the end face of the multi-core fiber is in contact with the light emitting / receiving element face, so the multi-core fiber is perpendicular to the optical subassembly surface.
  • the optical subassembly is perpendicular to the board surface, so it becomes tall and the problem is that it cannot be mounted on the board in the device if the distance between the boards in the device is short. .
  • the multi-core fiber As a means to solve this problem, it is conceivable to bend the multi-core fiber and mount the optical subassembly surface horizontally on the board surface.
  • the multicore fiber has a higher bending loss than the conventional (single core) single mode fiber, it is difficult to reduce the height by bending the fiber.
  • the bending loss of a single mode fiber is 1 dB or less, and the bending loss of a multi-core fiber is 3.4 dB (Non-patent Document 6).
  • the multi-core fiber is butt-jointed with the grating coupler formed on the optical subassembly surface. Therefore, when this module is mounted on the internal board, the optical subassembly surface is the internal board surface. It becomes perpendicular to. As a result, it becomes tall and, like the first embodiment, it is necessary to bend the multi-core fiber in order to reduce the height.
  • the method of solving the problem of the optical transceiver module mounted with the above two multi-core fibers is to use an optical connection section in which the optical connector section mounted with the multi-core fiber and the optical waveguide section with the optical path conversion section are connected at the end face.
  • an optical connection section in which the optical connector section mounted with the multi-core fiber and the optical waveguide section with the optical path conversion section are connected at the end face.
  • FIG. 3A is an example of end face connection between a multi-core fiber and an optical waveguide (the light emitting / receiving element and the lens shown in FIGS. 3B, 3C, 3D, and 3E are omitted).
  • FIG. 3B is a cross-sectional view of the optical connection portion showing that the optical coupling efficiency between the optical waveguide core and the light emitting element in FIG.
  • FIG. 3C is a cross-sectional view of the optical connection portion showing that the optical waveguide core and the light emitting element of FIG.
  • the lens is designed so that the optical coupling efficiency between the lowermost optical waveguide and the light emitting element is increased.
  • the light beam diameter is larger than that of the region of the optical path changing portion of the uppermost optical waveguide, so that the optical coupling efficiency is lowered.
  • FIG. 3B the light beam diameter is larger than that of the region of the optical path changing portion of the uppermost optical waveguide, so that the optical coupling efficiency is lowered.
  • an object of the present invention is to provide an optical transceiver module having an optical connection part in which a multi-core fiber and an optical waveguide are connected to each other at an end face, in which the optical coupling efficiency of each channel is uniform and high, and the height can be reduced. It is in.
  • a method of using lenses having different curvatures and sizes for each optical waveguide can be considered, but it is difficult or expensive to form different lenses. Therefore, it is desirable to use the same lens for each optical waveguide.
  • the features of the present invention are: (1) A light emitting / receiving element that transmits or receives an optical signal, an electronic circuit that drives the light emitting / receiving element to convert the electric signal into an optical signal, and an amplifier that amplifies the electric signal converted from the optical signal A plurality of optical circuits with optical path converters, which are optically connected to an optical subassembly mounted on an electrical wiring substrate and a plurality of cores of a multi-core fiber that transmits optical signals to and from the light emitting / receiving element, respectively.
  • an optical connection portion having an optical waveguide made of a waveguide core
  • an optical connection portion comprising an optical waveguide made of an optical waveguide core with an optical path conversion portion having at least one size different from that of another optical path conversion portion
  • An optical transceiver module comprising an optical connector having a multi-core fiber that is optically connected at an end face, and an electrical connector that enables electrical connection between the electrical wiring board and the board in the apparatus.
  • at least one of the optical waveguide cores in the optical waveguide optically connected to the light emitting element is an optical waveguide core whose core width is increased in a taper direction from the multicore fiber to the optical path changing unit.
  • At least one of the optical waveguide cores in the optical waveguide to be connected has an optical waveguide core whose core width narrows in a tapered shape in the direction from the multi-core fiber to the optical path changing unit.
  • at least one of the optical waveguide cores in the optical waveguide optically connected to the light emitting element receives the optical waveguide core whose core width and thickness increase in a taper shape from the multi-core fiber to the optical path changing unit.
  • at least one of the optical waveguide cores in the optical waveguide optically connected to the element has an optical waveguide core whose core width and thickness are reduced in a taper shape from the multi-core fiber to the optical path conversion unit.
  • a substrate for electrical wiring having an optical through hole for transmitting light it is preferable to use a substrate for electrical wiring having an optical through hole for transmitting light, and to dispose or form a lens on the optical connection portion.
  • a substrate for electric wiring made of a material that transmits light with integrated lenses.
  • a light emitting / receiving element that transmits or receives an optical signal
  • an electronic circuit that drives the light emitting / receiving element to convert the electric signal into an optical signal, and amplifies the electric signal converted from the optical signal
  • an optical subassembly mounted on an electric wiring board and a plurality of cores of a multi-core fiber that transmits optical signals to and from the light emitting and receiving elements, respectively,
  • an optical connecting portion having an optical waveguide consisting of a plurality of optical waveguide cores, the optical connecting portion having an optical waveguide in which the cross-sectional area of at least one optical path changing portion is different from the cross-sectional area of the optical waveguide core at the end of the optical waveguide opposite to the optical path changing portion.
  • an optical connector comprising a multi-core fiber that is optically connected to the optical connection portion at the end face, and an optical connector that can electrically connect the electrical wiring board and the in-device board. Is in the communication module.
  • at least one of the optical waveguide cores in the optical waveguide optically connected to the light emitting element is an optical waveguide core whose core width is tapered in the direction from the multi-core fiber to the optical path changing unit. It is preferable that at least one of the optical waveguide cores in the optical waveguide to be connected has an optical waveguide core whose core width is tapered in a direction from the multi-core fiber to the optical path changing unit.
  • At least one of the optical waveguide cores in the optical waveguide optically connected to the light emitting element receives the optical waveguide core whose core width and thickness increase in a taper shape from the multi-core fiber to the optical path changing unit. It is preferable that at least one of the optical waveguide cores in the optical waveguide optically connected to the element has an optical waveguide core whose core width and thickness are reduced in a taper shape from the multicore fiber toward the optical path conversion unit. (10) In (7), at least one optical waveguide in which the cross-sectional area of the optical path conversion portion is larger than that of other optical waveguides, and the cross-sectional area of the optical waveguide core is large and uniform compared to other optical waveguides.
  • a multi-core fiber having a core size larger than that of other multi-core fibers that are optically connected to the optical waveguide it is preferable to use a substrate for electrical wiring having an optical through hole for transmitting light, and to dispose or form a lens on the optical connecting portion.
  • a substrate for electrical wiring made of a material that transmits light with integrated lenses.
  • a light emitting / receiving element that transmits or receives an optical signal, an electronic circuit that drives the light emitting / receiving element to convert the electric signal into an optical signal, and amplifies the electric signal converted from the optical signal.
  • an optical subassembly mounted on an electric wiring board and a plurality of cores of a multi-core fiber that transmits optical signals to and from the light emitting and receiving elements, respectively,
  • An optical connecting portion having an optical waveguide consisting of a plurality of optical waveguide cores, wherein the optical connecting portion comprises an optical waveguide consisting of an optical waveguide core with an optical path changing portion having at least one size different from that of the other optical path changing portion, and the optical connection
  • An optical transmission / reception module comprising an optical connector having a multi-core fiber that is optically connected to the section and an end face, and an electrical connector that enables electrical connection between the electrical wiring board and the in-device board.
  • a light emitting / receiving element that transmits or receives an optical signal
  • an electronic circuit that drives the light emitting / receiving element to convert the electric signal into an optical signal, and amplifies the electric signal converted from the optical signal.
  • an optical subassembly mounted on an electric wiring board and a plurality of cores of a multi-core fiber that transmits optical signals to and from the light emitting and receiving elements, respectively,
  • an optical connection portion having an optical waveguide composed of a plurality of optical waveguide cores
  • the optical connection portion having an optical waveguide in which the cross-sectional area of at least one optical path conversion portion and the optical waveguide core cross-sectional area at the end of the optical waveguide opposite to the optical path conversion portion are different
  • an optical connector comprising a multi-core fiber that is optically connected to the optical connection portion at the end face, and an optical connector that enables electrical connection between the electrical wiring board and the in-device board. It is in an information device that mounts a receiving module on a board in the device or
  • the optical coupling efficiency of each channel can be made uniform and high in a low profile and large capacity optical transceiver module equipped with a multi-core fiber.
  • Sectional drawing of the 1st basic form of the optical transmission / reception module of this invention Sectional drawing of the 2nd basic form of the optical transmission / reception module of this invention. It is a figure explaining the subject of the optical connection structure which consists of the conventional optical waveguide and multicore fiber, and is a figure which shows an example of the end surface connection of a multicore fiber and an optical waveguide. It is a figure explaining the subject of the optical connection structure which consists of the conventional optical waveguide and multi-core fiber, and sectional drawing of the optical connection part which showed a mode that the optical coupling efficiency of an optical waveguide core and a light emitting element was bad.
  • the bird's-eye view of the 1st form of the optical connection part in the optical transmission / reception module of this invention (in the case of a light emitting element).
  • the figure which looked at the 1st form of the optical connection part in the optical transmission / reception module of this invention from the top (in the case of a light emitting element).
  • the bird's-eye view of the 1st form of the optical connection part in the optical transmission / reception module of this invention in the case of a light receiving element).
  • the figure which looked at the 1st form of the optical connection part in the optical transmission / reception module of this invention from the top (in the case of a light receiving element).
  • the bird's-eye view of the 2nd form of the optical connection part in the optical transmission / reception module of this invention (in the case of a light emitting element).
  • Sectional drawing of the 2nd form of the optical connection part in the optical transmission / reception module of this invention (in the case of a light emitting element).
  • the figure which looked at the 2nd form of the optical connection part in the optical transceiver module of this invention from the top (in the case of a light emitting element).
  • the bird's-eye view of the 2nd form of the optical connection part in the optical transmission / reception module of this invention (in the case of a light receiving element).
  • Sectional drawing of the 2nd form of the optical connection part in the optical transmission / reception module of this invention (in the case of a light receiving element).
  • the figure which looked at the 2nd form of the optical connection part in the optical transceiver module of this invention from the top (in the case of a light receiving element).
  • the bird's-eye view of the 3rd form of the optical connection part in the optical transmission / reception module of this invention (in the case of a light emitting / receiving element).
  • Sectional drawing of the 3rd form of the optical connection part in the optical transmission / reception module of this invention in the case of a light emission and a light receiving element.
  • the figure which looked at the 3rd form of the optical connection part in the optical transmission / reception module of this invention from the top in the case of a light emission and a light receiving element).
  • Explanatory drawing of the information apparatus carrying the photoelectric conversion module of this invention The mounting block diagram when the photoelectric conversion module is arranged close to the switch LSI.
  • the figure which shows the cross section of FIG. The block diagram (bird's-eye view) of an optical waveguide.
  • FIG. 1 A first embodiment of the optical transceiver module according to claim 1 will be described with reference to FIG. 1, FIG. 3, FIG. 4, FIG.
  • the light emitting / light receiving element array 1 and the electronic circuit array 2 are flip-chip mounted on the substrate 3 for electric wiring.
  • the electrical wiring substrate 3 has a through hole 43 for transmitting light.
  • materials for light emitting elements and light receiving elements which are optical elements, InP-based compound semiconductors, Si, Ge semiconductors, or the like can be applied. Si or SiGe can be used as the material for the electronic circuit.
  • a lens array 4 for condensing light is formed on a surface opposite to the surface of the electric wiring substrate 3 on which the light emitting / receiving element array 1 and the electronic circuit array 2 are mounted.
  • the lens array 4 may be, for example, a lens sheet or a lens integrated in an optical waveguide structure including the optical waveguide 6 with an optical path conversion unit and the clad unit 13.
  • the optical waveguide 6 has an individual optical path conversion unit in each optical waveguide.
  • a polymer material or the like can be applied as the material of the optical waveguide.
  • the end surface of the optical waveguide 6 opposite to the optical path changing section 46 (details of the optical waveguide 6 are described in FIGS. 12A and 12B) are multi-cores having one or more multi-core fibers 8.
  • the end face of the fiber optic connector 7 is connected so as to minimize optical coupling loss.
  • the number of cores of the multi-core fiber is 12, and the core arrangement is a square lattice.
  • the present invention can also be applied to multicore fibers having other numbers of cores and other arrangements.
  • the multi-core fiber optical connector 7 for example, a multi-core fiber mounted on an MT connector which is one of the conventional multi-core fiber connectors can be considered.
  • the multi-core fiber optical connector 7 is fixed to the electric wiring board 3 with an adhesive.
  • a method of fixing the receptacle of the optical connector to the electrical wiring board 3 so that the optical connector can be removed and fixing the multi-core fiber optical connector 7 to the receptacle of the optical connector with a guide pin and a leaf spring is also conceivable.
  • the structure of the optical waveguide 6 will be described.
  • the optical waveguide 6 includes an optical path conversion unit 46 and an optical waveguide core 47, and details are shown in FIGS. 12 (a) and 12 (b). 3, 4, and 5, only the optical waveguide is displayed to avoid complexity, and the optical path conversion unit 46 and the optical waveguide core 47, which are the components, are omitted.
  • FIGS. 4A and 4B are shown.
  • the core of the uppermost optical waveguide 19 a core whose core width increases in a taper shape from the multi-core fiber to the optical path changing unit 46 is used. Since the optical path conversion unit 46 is larger than the size of the light beam spot 20, high optical coupling efficiency can be realized.
  • the taper shape assumes that the core width is changed adiabatically so that light propagates while maintaining the excited state of the mode. This can reduce the propagation loss that occurs when the core width is suddenly changed.
  • FIG. 5A and FIG. As the core of the lowermost optical waveguide 19, a core whose core width is tapered in the direction from the multi-core fiber to the optical path changing unit 46 is used. Since the size of the light beam spot 20 emitted from the optical path changing unit 46 is small, when it reaches the lens, it enters the diameter thereof, so that high optical coupling efficiency can be realized.
  • An optical transmission / reception module of the present invention comprising: an optical wiring board 3; an optical waveguide 6 with an optical path conversion unit; an optical connection unit comprising a multicore fiber optical connector 7; a multicore fiber 8; It can be mounted on the board 11 in the apparatus.
  • tungsten, molybdenum alone having a low thermal expansion coefficient tungsten, molybdenum alone having a low thermal expansion coefficient
  • a composite material of tungsten, molybdenum and copper tungsten, molybdenum and copper
  • a composite material of aluminum silicon carbide tungsten, molybdenum and copper
  • FIG. 9 shows an example in which the optical transceiver module is applied to an information device.
  • the information apparatus includes a plurality of line cards 28, a switch card 35, a backplane optical fiber 30 and a backplane 29 that connect the cards.
  • the line card 28 includes a backplane connector 31, a power connector 32, the optical transmission / reception module 33, an electronic circuit 34, and an interface card 27.
  • the switch card 35 includes a backplane connector 31, a power connector 32, the optical transmission / reception module 33, and an electronic circuit 34.
  • FIGS. 6A and 6B A second embodiment having an optical waveguide structure different from that of the first embodiment will be described with reference to FIGS.
  • the optical waveguide structure for the light emitting element will be described.
  • the core of the uppermost optical waveguide 21 from the multi-core fiber to the optical path conversion unit 46
  • a core whose core width and thickness are increased in a tapered shape is used.
  • the optical path conversion unit 46 is omitted in FIG. 6 (details of the optical waveguide are described in FIG. 12).
  • the optical path conversion unit 46 Since the optical path conversion unit 46 is larger than the size of the light beam spot 20, high optical coupling efficiency can be realized.
  • the taper shape assumes that the core width and core thickness are changed adiabatically to reduce propagation loss.
  • the optical waveguide structure for the light receiving element will be described.
  • the optical path conversion from the multi-core fiber is performed as the core of the lowermost optical waveguide 21 A core whose core width and core thickness are tapered in the direction of the portion 46 is used (similar to FIG. 6, since the optical path changing portion 46 is omitted, see FIGS. 12A and 12B). Since the size of the light beam spot 20 emitted from the optical path changing unit 46 is small, when the light beam spot 20 reaches the lens, it enters the size, so that high optical coupling efficiency can be realized.
  • a third embodiment having an optical waveguide structure different from those of Examples 1 and 2 will be described with reference to FIG.
  • FIGS. 8 (a), (b), and (c) In order to solve the non-uniformity of the optical coupling efficiency between the channels of the light emitting and receiving elements, as shown in FIGS. 8 (a), (b), and (c), other optical A core having a larger cross-sectional area than the core of the waveguide 6 is used. Since the optical path changing unit 46 for the light emitting element is larger than the size of the light beam spot 20, high optical coupling efficiency can be realized. As in the first embodiment, in order to avoid the complexity of the drawing, the optical path conversion unit 46 is omitted in FIG. 8 (details of the optical waveguide are described in FIGS. 12A and 12B).
  • the light beam spot size when exiting from the optical path conversion unit 46 is larger than that from the other optical path conversion units 46.
  • the distance to the lens is short, the beam spread of light is small and a very high optical coupling efficiency can be realized.
  • the core 14 of the multi-core fiber with respect to the core of the uppermost optical waveguide 22 is made larger than the core 45 of the other multi-core fiber.
  • the electrical wiring board 3 is different from the optical transceiver module configuration shown in FIG. 1 (FIG. 2).
  • the light emitting / receiving element array 1 and the electronic circuit 2 are flip-chip mounted on the electric wiring board 3.
  • the electric wiring board 3 is made of a material that transmits light from the light emitting element. For example, when the wavelength of light is 1 ⁇ m or more, Si is used as the material for the electrical wiring substrate 3.
  • a lens 4 for condensing light is formed on a surface opposite to the surface of the electric wiring substrate 3 on which the light emitting / receiving element array 1 and the electronic circuit 2 are mounted. Other configurations are the same as those shown in FIG.
  • FIG. 11 shows a cross-sectional view of a connection configuration example of the switch LSI 37 and the optical transceiver module via the interposer 36.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Integrated Circuits (AREA)

Abstract

La présente invention permet d'uniformiser l'efficacité de couplage optique de canaux et de l'augmenter dans un module émetteur-récepteur optique à profil bas, à haute capacité dans lequel est montée une fibre multicœur, au moyen d'un module émetteur-récepteur optique conçu à partir : d'un sous-ensemble optique dans lequel un élément d'émission/réception de lumière servant à envoyer ou recevoir un signal optique, un circuit électronique servant à piloter l'élément d'émission/réception de lumière afin de convertir un signal électrique en un signal optique, et un circuit électronique servant à amplifier le signal électrique converti à partir du signal optique sont montés sur un substrat de câblage électrique ; d'une partie de connexion optique comportant un guide d'ondes optique comprenant une pluralité de cœurs de guide d'ondes optique équipés de parties de conversion de trajet optique, la partie de connexion optique servant à connecter optiquement l'élément d'émission/réception de lumière et chaque cœur de plusieurs cœurs d'une fibre multicœur pour transmettre un signal optique, un guide d'ondes optique étant prévu dans la partie de connexion optique, lequel comprend des cœurs de guide d'ondes optique équipés de parties de conversion de trajet optique, la taille d'au moins l'un d'entre eux différant de la taille des autres parties de conversion de trajet optique ; d'un connecteur optique pourvu d'une fibre multicœur de connexion optique, au niveau d'une surface d'extrémité, à la partie de connexion optique ; et d'un connecteur électrique permettant d'établir une connexion électrique du substrat de câblage électrique et d'une carte interne au dispositif.
PCT/JP2015/069580 2015-07-08 2015-07-08 Module émetteur-récepteur optique et dispositif d'informations l'utilisant WO2017006445A1 (fr)

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