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WO2014112281A1 - Module optique et système de transmission optique - Google Patents

Module optique et système de transmission optique Download PDF

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Publication number
WO2014112281A1
WO2014112281A1 PCT/JP2013/084078 JP2013084078W WO2014112281A1 WO 2014112281 A1 WO2014112281 A1 WO 2014112281A1 JP 2013084078 W JP2013084078 W JP 2013084078W WO 2014112281 A1 WO2014112281 A1 WO 2014112281A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical
optical module
incident
emission
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/JP2013/084078
Other languages
English (en)
Japanese (ja)
Inventor
博志 立石
那倉　裕二
加藤　清
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.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries 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 Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Publication of WO2014112281A1 publication Critical patent/WO2014112281A1/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
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • 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
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • G02B6/322—Optical coupling means having lens focusing means positioned between opposed fibre ends and having centering means being part of the lens for the self-positioning of the lightguide at the focal point, e.g. holes, wells, indents, nibs

Definitions

  • the present invention relates to an optical module used for transmitting an optical signal, and an optical transmission system using the optical module.
  • laser light with high directivity and focusing is used as a light source in optical transmission systems and optical connectors.
  • laser light is collected by an optical lens and introduced into an optical fiber. Are connected directly to perform optical transmission. For this reason, the outgoing light from the optical fiber becomes divergent light.
  • Patent Document 1 there is a method of performing optical transmission using a relay connection of an optical fiber by using a collimating lens as light emitted from a diffusing optical fiber as expanded parallel light.
  • the light emitted from the exit surface of the optical connector becomes parallel light regardless of whether transmission, reception, or relay is performed, and the optical power ( The density is also high. This is not a problem at the steady state when optical connectors are fitted and information is transmitted. However, when the optical connector is not fitted, such as checking whether light has arrived, there is much work by humans. May damage your eyes. In order to prevent injury to the eyes (hereinafter, this concept is referred to as “eye safety”), for example, the IEC standard and EN standard also include standards (IEC 60825) defined from the viewpoint of eye safety. 1, EN60825-1, etc.).
  • Optical transmission requires relatively high optical power, and according to the above eye safety standards, it is obliged to wear protective glasses depending on the optical power (density), and to measure and evaluate with sensors in a closed space where human eyes do not touch.
  • the workability was extremely poor and difficult.
  • the problem to be solved by the present invention is that eye safety that does not obligate measurement / evaluation by a sensor in a closed space that is not in contact with human eyes without wearing protective glasses without reducing the transmitted optical power.
  • An object of the present invention is to provide an optical module and an optical transmission system that can satisfy the standards.
  • an optical module is a member made of a light emitting member that emits light and a material that transmits light emitted from the light emitting member, and the light that has passed through is emitted.
  • An emission-side light transmission member that has an emission surface and is connectable to an incident-side light transmission member to which a light incident member on which light emitted from the emission surface is incident is attached. The light emitted from the emission surface is divergent light.
  • the exit side light transmitting member is provided with an adjustment lens portion through which the light emitted from the light emitting member passes so that the divergence angle of the diverging light emitted from the emission surface becomes a predetermined angle. It is good to have.
  • an optical transmission system is provided on at least a part of a path from a light emitting unit that emits an optical signal to a light receiving unit that receives the optical signal.
  • An optical transmission system including an output-side optical module that is an optical module and an incident-side optical module connected to the output-side optical module, wherein the incident-side optical module serves as an output-side light transmitting member of the output-side optical module
  • An incident-side light transmitting member made of a material that can be connected and transmits light, and a light incident member on which light that has passed through the incident-side light transmitting member is incident.
  • a converging lens unit is provided for converging the diverging light emitted from the exit surface of the exit side light transmitting member of the side light module so as to enter the light incident member. .
  • light emitted from the emission surface of the emission side light transmitting member is divergent light. Therefore, the light emitted from the emission surface spreads in the plane direction orthogonal to the optical axis as it leaves the emission surface. That is, the optical power within a predetermined range (amount of light within the predetermined range) at a location that is a predetermined distance away from the exit surface is smaller than the optical power within the same range at the exit surface (amount of light within the same range). Therefore, the required eye safety standard can be satisfied without reducing the transmitted optical power.
  • emitted from the output surface of an output side light transmissive member is connected to an output side light transmissive member (it may be directly connected or a relay member)
  • the light emitted from the exit surface may be diverged if the light is converged on the light incident member by the converging lens portion provided on the incident side light transmitting member. Almost no transmission loss occurs.
  • the optical power within a predetermined range at a location separated by the predetermined length is increased or decreased by a change in the divergence angle of the divergent light emitted from the emission surface. Therefore, if the adjustment lens part that allows light to pass through is provided on the exit side light transmitting member, the divergence angle is set so as to satisfy the required eye safety standard by designing the adjustment lens part (adjusting the refractive index). it can.
  • FIG. 1 schematically shows a cross-section (hatching is omitted) of an optical module according to an embodiment of the present invention (the optical module is used at an intermediate position of an optical transmission system (where optical fibers are optically connected)).
  • FIG. It is a schematic diagram when the light emitted from the emission surface is divergent light so that there is a component (light ray) deviating from the virtual circle with the diameter d at a point away from the emission surface by a predetermined distance D.
  • FIG. 1 is a schematic diagram of an optical transmission system according to an embodiment of the present invention.
  • FIG. 6 is a schematic view of an optical transmission system different from that of FIG. 5 (a holder having the same shape on the light emitting element side and the light receiving element side). It is a schematic diagram of the structure using the relay connector which connects an output side light transmissive member and an incident side light transmissive member.
  • An optical module 10 includes a light emitting member 11 and an emitting side light transmitting member 12.
  • the light emitting member 11 is a member that emits light constituting a signal to be transmitted.
  • the optical module 10 is used at a place where an electrical signal is converted into an optical signal (the most upstream side of the optical transmission system), the electrical signal is converted into an optical signal (predetermined as in the optical module 10a shown in FIG. 1).
  • the light emitting element 11 a that emits as a laser beam having a divergence angle (divergence angle) corresponds to the light emitting member 11.
  • This type of light emitting element 11a is generally mounted on the output side substrate B1.
  • an optical fiber that transmits an optical signal like the optical module 10b shown in FIG. 11 b corresponds to the light emitting member 11.
  • the emission-side light transmission member 12 is a member formed of a material that transmits light emitted from the light emission member 11 (light that transmits a signal).
  • the emission side light transmission member 12 has an emission surface 122 from which the transmitted light is emitted.
  • the optical module 10 according to the present embodiment is an element constituting the optical transmission system, the emission-side light transmitting member 12 has a counterpart optical module (an incident-side light to be described later) having a member that transmits an optical signal. It has the output side connector part 121 for connecting to the transmissive member 22).
  • the light emitting element 11a is the optical module 10a corresponding to the light emitting member 11
  • a member called a holder or the like becomes the emitting side light transmitting member 12a.
  • the light emitting side holder 12a has a cylindrical portion 124 surrounding the light emitting element 11a, and the tip of the cylindrical portion 124 is a member fixed to the output side substrate B1 on which the light emitting element 11a is mounted by soldering or the like. is there.
  • the optical fiber 11b is the optical module 10b corresponding to the light emitting member 11
  • the optical connector (or the ferrule itself) having the ferrule part to which the optical fiber 11b is fixed becomes the emitting side light transmitting member 12b.
  • the emission-side light transmitting member 12 of the optical module 10 causes the light emitted from the light emission member 11 to be emitted from the emission surface 122 as divergent light (laser light having a predetermined divergence angle (divergence angle)).
  • the divergence angle of the divergent light is defined based on the eye safety standard. Specifically, it is as follows.
  • the so-called eye safety standard has a diameter d that passes through the center of the optical axis X and is orthogonal to the optical axis X at a predetermined distance D along the optical axis X from the point where the light is emitted.
  • the present invention increases the component (light ray) that falls outside the virtual circle of the diameter d at a point that is a predetermined distance D away from the emission surface 122 of the optical module 10 along the optical axis X.
  • the light emitted from the emission surface 122 is not divergent light but is divergent light. That is, the divergence angle is set so that the optical power in the virtual circle is not more than a predetermined reference value.
  • an adjustment lens portion 123 may be provided on the emission side light transmitting member 12a as in the optical module 10a shown in FIG. That is, the adjustment lens part 123 into which the light emitted from the light emitting member 11 enters is provided, and the divergence angle of the light emitted from the emission surface 122 by passing through the adjustment lens part 123 satisfies the eye safety reference. It should be satisfied.
  • the adjustment as described above is performed if the light divergence angle when the light emitted from the light emitting member 11 is emitted as it is satisfies the eye safety standard.
  • the lens unit 123 may not be used.
  • the divergence angle of light the smaller the optical power in the imaginary circle. Therefore, if the eye safety standard is satisfied, the divergence angle may simply be increased. However, if the divergence angle is increased too much, loss in the transmission process increases, and it becomes difficult to design the focusing lens unit 222 described later. Therefore, the divergence angle is within the range that satisfies the eye safety standard. Is preferably small (close to parallel light). Regardless of the presence or absence of the adjusting lens portion 123, the refraction of the light emitted from the emission surface 122 is also considered in consideration of refraction at the emission surface 122 (the interface between the material constituting the emission-side light transmitting member 12 and air). It is necessary to set the divergence angle (design the adjustment lens unit 123).
  • the divergent light emitted from the emission surface 122 is converged by the focusing lens unit 222 provided in the counterpart module (incident side light transmitting member 22) connected to the optical module 10 according to the present embodiment, and is focused on the light incident member 21.
  • Incident light (refer to the description of the optical transmission system 1 described later for details of this point).
  • the light emitted from the emission surface 122 is not divergent light but divergent light, thereby reducing the transmitted optical power and reducing the eye safety standard. Can be satisfied.
  • the optical transmission system 1 has the optical module 10 (at least part of the path from the light emitting unit (light emitting element 11a) that emits an optical signal to the light receiving unit (light receiving element 21a) that receives the optical signal.
  • the optical module 10 at least part of the path from the light emitting unit (light emitting element 11a) that emits an optical signal to the light receiving unit (light receiving element 21a) that receives the optical signal.
  • an emission side optical module 10 an emission side optical module
  • an incident side optical module 20 connected to the emission side optical module 10.
  • the exit-side optical module 10 is configured such that the light emitted from the exit surface 122 is divergent light that satisfies the eye safety standard as described above.
  • the incident side optical module 20 is an optical module into which the light (optical signal) emitted from the emission side optical module 10 enters. In other words, in the optical transmission system 1, the optical module is located on the downstream side of a certain outgoing-side optical module 10.
  • the incident side optical module 20 includes an incident side light transmitting member 22 and a light incident member 21.
  • the incident side light transmission member 22 is a member formed of a material that transmits light emitted from the emission surface 122 of the emission side light transmission member 12.
  • the incident-side light transmitting member 22 includes an incident-side connector portion 221 that can be fitted into the emitting-side connector portion 121 provided in the emitting-side light transmitting member 12.
  • This connector part structure of a connector part
  • the optical axis X of the exit side optical module 10 each member constituting the exit side optical module
  • the entrance side optical module 20 incident side optical module 20.
  • the optical axes X of the members constituting the same coincide with each other.
  • the light receiving element 21a is the incident side optical module 20a corresponding to the light emitting member 21
  • a member referred to as a holder or the like corresponds to the incident side light transmitting member 22a.
  • the light receiving side holder 22a has a cylindrical portion 223 surrounding the light receiving element 21a, and the tip of the cylindrical portion 223 is a member fixed to the input side substrate B2 on which the light receiving element 21a is mounted by soldering or the like. is there.
  • the optical fiber 11b is the emission side optical module 10b corresponding to the light emitting member 11
  • the optical connector (or the ferrule itself) having the ferrule part to which the optical fiber 11b is fixed corresponds to the incident side light transmitting member 22b. Become.
  • a portion 222 is provided. That is, the divergent light changes to focused light (laser light having a predetermined focusing angle) by passing through the focusing lens unit 222.
  • the converging lens unit 222 is set to have a converging angle so that the converging light transmitted through the incident-side light transmitting member 22 can enter the light incident member 21.
  • the light incident member 21 refers to an optical member provided in the incident side optical module 20.
  • the optical fiber 21b corresponds to the light incident member 21, and is used at a place where an optical signal is converted into an electric signal (the most downstream side of the optical transmission system 1).
  • the light receiving element 21 a that converts an optical signal into an electric signal corresponds to the light incident member 21.
  • the focusing lens unit 222 is arranged so that the focal point of the focused light is located on the light incident surface of the light incident member 21 (the upstream end surface of the optical fiber 21b or the light incident portion of the light receiving element 21a) (the light incident surface of the light incident member 21). To be condensed).
  • the optical transmission system 1 includes a portion where the emission side optical module 10 (10a, 10b) and the incident side optical module 20 (20a, 20b) having such a configuration are connected.
  • the output side optical module 10 in which the light emitted from the emission surface 122 is divergent light and the incident side optical module 20 connected thereto may be alternately provided.
  • the light emitted from the emission surface 122 of all the emission-side optical modules 10 (the emission-side light transmitting members 12) is set as diverging light, that is, where in the transmission path Since the configuration is such that divergent light is emitted from the emission surface 122 even if the light is cut, the transmission system is excellent from the viewpoint of the eye safety.
  • the optical transmission system 1 shown in FIG. 6 includes a holder 30 mounted on the input-side board B2 that is a light transmitting member and an incident-side optical module 31 that is fitted to the holder 30 in order to share components. It is the same shape as the light emitting element 11a side. In this case, the light emitted from the incident-side optical module 31 connected to the holder 30 on the light receiving element 21a side becomes the convergent light, but the light emitted from the other incident-side optical modules is divergent light. It becomes.
  • optical module 10 having such a configuration (exit side) and the optical transmission system 1 including the output side optical module 10 and the incident side optical module have the following operational effects.
  • the optical module 10 In the optical module 10 according to the present embodiment (exit side), light emitted from the exit surface 122 of the exit side light transmitting member 12 is divergent light. Therefore, the light emitted from the emission surface 122 spreads in the plane direction orthogonal to the optical axis X as the distance from the emission surface 122 increases. That is, the optical power within the predetermined range (within the imaginary circle having the diameter d) at a position away from the output surface 122 by a predetermined length is equal to the optical power within the same range on the output surface 122 (the same). Smaller than the amount of light within the range). Therefore, the required eye safety standard can be satisfied without reducing the transmitted optical power.
  • the optical power within a predetermined range at a location separated by the predetermined length is increased or decreased by a change in the divergence angle of the diverging light emitted from the emission surface 122. Therefore, if the adjustment lens portion 123 through which light passes is provided in the emission side light transmitting member 12 as in the present embodiment, the eye safety required by the design of the adjustment lens portion 123 (refractive index adjustment).
  • the divergence angle that satisfies the standard can be set.
  • the diverging light emitted from the emission surface 122 of the emission side light transmission member 12 is provided on the incident side light transmission member 22 connected to the emission side light transmission member 12. If the light is converged by the converging lens unit 222 and is incident on the light incident member 21, transmission loss due to the divergent light generated from the light exit surface 122 hardly occurs.
  • the divergent light propagates in the space between the emission side optical module 10 and the incidence side optical module 20 (having a larger beam diameter than the conventional one), it can be attached to the emission surface 122 of the emission side optical module 10. It is hard to be affected by dust and the like.
  • the connector portions 121 and 221 are provided on the emission-side light transmission member 12 and the incident-side light transmission member 22, but the present invention is also applied to those in which such connector portions 121 and 221 are not provided.
  • the technical idea of the invention is applicable.
  • a relay connector that connects the emission side light transmission member 12 and the incident side light transmission member 22 may be used. That is, “the emission side light transmission member 12 and the incidence side light transmission member 22 can be connected” includes a configuration in which connection is possible using another member such as a relay connector shown in FIG. 7.

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

Abstract

La présente invention concerne un module optique et un système de transmission optique qui permettent de répondre à une norme de sécurité requise concernant les yeux sans causer de perte de transmission de puissance optique. Le module optique (10) est équipé : d'un élément d'émission de lumière (11) qui émet de la lumière ; et d'un élément de transmission de lumière côté émission (12) qui comprend un matériau qui transmet la lumière émise par l'élément d'émission de lumière (11), qui est doté d'une surface d'émission (122) à partir de laquelle la lumière qui passe par celle-ci est émise, et qui peut être connecté à un élément de transmission de lumière côté entrée (22) sur lequel est fixé un élément d'entrée de lumière (21) dans lequel entre la lumière qui est émise par la surface d'émission de lumière (122). La lumière qui est émise par la surface d'émission (122) de l'élément de transmission de lumière côté émission (12) est une lumière divergente.
PCT/JP2013/084078 2013-01-15 2013-12-19 Module optique et système de transmission optique Ceased WO2014112281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013004317A JP2014137384A (ja) 2013-01-15 2013-01-15 光モジュールおよび光伝送システム
JP2013-004317 2013-01-15

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WO2014112281A1 true WO2014112281A1 (fr) 2014-07-24

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PCT/JP2013/084078 Ceased WO2014112281A1 (fr) 2013-01-15 2013-12-19 Module optique et système de transmission optique

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WO (1) WO2014112281A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10317631B2 (en) 2015-09-30 2019-06-11 Sony Corporation Optical communication connector to restrain direct emission of collimated light

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106062602B (zh) * 2014-03-06 2018-06-08 索尼公司 光连接器、线缆和光通信装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000047071A (ja) * 1998-05-27 2000-02-18 Sharp Corp 光送受信モジュール、光送受信中継器、及びそれらを用いた光送受信システム

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000047071A (ja) * 1998-05-27 2000-02-18 Sharp Corp 光送受信モジュール、光送受信中継器、及びそれらを用いた光送受信システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10317631B2 (en) 2015-09-30 2019-06-11 Sony Corporation Optical communication connector to restrain direct emission of collimated light

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Publication number Publication date
JP2014137384A (ja) 2014-07-28

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