JP5692144B2 - Optical connector module - Google Patents

Description

  The present invention relates to an optical connector module for connecting electronic devices with an optical cable.

  In order to improve the signal transmission speed between electronic devices, it is known to optically connect between electronic devices. For this reason, it is known to wire between electronic devices using an optical connector module that converts an electrical signal into an optical signal, for example, as in Patent Document 1. Such an optical connector module includes an optical cable including a plurality of optical fibers, and a pair of connectors that mutually convert an optical signal and an electrical signal.

Japanese Patent Laid-Open No. 10-32545

By the way, in the connector of the optical connector module as described above, a plurality of light emitting / receiving elements are mounted on the same surface of the same substrate.
In such an optical connector module, if the same connector is directly attached to both ends of the optical cable, the arrangement order of the channels of the connector at one end and the arrangement order of the channels of the connector at the other end are changed. For example, when one is “transmission 1, transmission 2, reception 1, reception 2”, the other is “transmission 2, transmission 1, reception 2, reception 1”, and channel 1 and channel 2 are reversed.
Therefore, conventionally, two different types of connectors are prepared, and each is attached to one end and the other end of the connector. For this reason, a connector having a different shape has to be created, which is one of the factors that increase the manufacturing cost. In addition, it is necessary to distinguish two types of connectors from each other and attach them to the optical cable, which makes the assembly work complicated.

  Therefore, an object of the present invention is to provide an optical connector module that is easy to assemble and low in manufacturing cost.

The optical connector module of the present invention that can solve the above-mentioned problems is an optical connector module that mutually transmits optical signals between one end side and the other end side,
An optical cable having a plurality of transmission optical fibers that transmit optical signals from one end side to the other end side, and a plurality of reception optical fibers that transmit optical signals from the other end side to one end side;
A connector substrate having a light emitting element and a light receiving element that are optically coupled to the transmitting optical fiber and the receiving optical fiber, respectively, on the same surface of a single substrate;
On one end side and the other end side, a plurality of transmission optical fibers and a plurality of reception optical fibers are attached to the connector board in a state of being aligned in a line,
The plurality of transmission optical fibers and the plurality of reception optical fibers are respectively attached to the optical connector by being twisted so that the order of arrangement differs from one end side to the other end side. To do.
In this case, each of the plurality of transmission optical fibers and the plurality of reception optical fibers is twisted and attached to the optical connector so that the arrangement order is reversed from one end side to the other end side. It is preferable.

  In the optical connector module of the present invention, the plurality of transmission optical fibers and the plurality of reception optical fibers are both twisted at one side, or twisted at different locations on one side and the other side. May be.

In the optical connector module of the present invention, the plurality of transmission optical fibers and the plurality of reception optical fibers are accommodated in the optical cable in a state of being aligned with a first pitch in a predetermined direction, and in the predetermined direction. Fixed to the connector board in a state of being aligned in a row with a second pitch wider than the first pitch;
A plurality of the transmission optical fibers and a plurality of the reception optical fibers twisted so that the arrangement order is reversed, the transmission optical fiber and the reception are located outside in an area aligned with the first pitch. Optical fiber is twisted inward and fixed to the connector board,
The transmitting optical fiber and the receiving optical fiber positioned outside in the region aligned with the first pitch are moved in the predetermined direction when overcoming the transmitting optical fiber and the receiving optical fiber positioned inside. A curved portion may be formed in a direction perpendicular to the direction.

In the optical connector module of the present invention,
Regarding the plurality of transmission optical fibers and the plurality of reception optical fibers, the region aligned with the first pitch and the region aligned with the second pitch are offset in a direction perpendicular to the predetermined direction. The bending portion may be formed toward the offset direction.

  According to the optical connector module of the present invention, each of the plurality of transmission optical fibers and the plurality of reception optical fibers is twisted so that the arrangement order is reversed between the one end side and the other end side. The order of the channels is reversed between the one end side and the other end side. Therefore, since the same connector board can be used for both ends of the cable, the manufacturing cost can be reduced. Further, since the arrangement order of the channels at one end and the other end can be made uniform by a simple method of twisting so as to be reversed, the assembly of the optical connector module is easy, and the manufacturing cost can be reduced.

(A) is a whole perspective view of the optical connector module concerning 1st Embodiment of this invention, (B) is sectional drawing of an optical cable. It is sectional drawing which shows the inside of a connector. It is a top view of a connector board. It is a top view which shows a part of optical connector module. It is a top view which shows the twisted state of an optical fiber core wire. It is a top view which shows a part of optical connector module concerning 2nd Embodiment of this invention.

(First embodiment)
Hereinafter, an optical connector module according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is an overall perspective view of the optical connector module 10 according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view of the optical cable 20. As shown in FIG. 1A, the optical connector module 10 according to the present embodiment includes an optical cable 20 and connectors 30A and 30B attached to one end side and the other end side of the optical cable 20, respectively.

  The optical connector module 10 can be used for signal (data) transmission. For example, the optical connector module 10 is electrically connected to an electronic device such as a personal computer or a monitor as a connection destination, converts an input / output electric signal into an optical signal, and transmits an optical signal between one end side and the other end side. Are mutually transmitted at high speed. In the following description, the connectors 30 </ b> A and 30 </ b> B are simply referred to as a connector 30 unless the one end side and the other end side are particularly distinguished.

  As shown in FIG. 1 (B), the optical cable 20 has an optical fiber ribbon 21 at the center as seen in the cross section. The optical fiber ribbon 21 is formed by bundling a plurality (four in this example) of optical fiber cores (optical fibers) 22 in parallel on a plane and bundling them in a tape shape with a coating resin. The optical fiber ribbon 21 is accommodated inside the inner coated inner tube 23. That is, inside the optical cable 20, the optical fibers 22 are aligned with a first pitch (for example, 125 μm pitch). As described above, the plurality of optical fibers accommodated in the optical cable 20 are preferably bundled and integrated in a tape shape so that the arrangement is defined with a predetermined arrangement and pitch.

  An intervening layer 24 is provided around the inner tube 23 along with a bundle of tensile strength fibers 241. A metal layer 25 made of a plurality of metal strands is provided on the outer periphery of the intervening layer 24. A jacket 26 made of an insulating resin is provided on the outer periphery of the metal layer 25. Further, it is covered with a braid 24 and an outer covering 25.

  As shown in FIG. 1A, the connector 30 includes a housing 31 and an electrical input / output unit 32 provided on the distal end side of the housing 31 (on the side opposite to the optical cable 20). The electrical input / output unit 32 is connected to an external device (such as a personal computer) and inputs / outputs electrical signals between the external device and the optical connector module 10. The electric input / output unit 32 is provided so as to protrude from the distal end portion of the housing 31 toward the distal end side.

  FIG. 2 is a cross-sectional view showing the inside of the connector 30. As shown in FIG. 2, the connector 30 includes a connector substrate 33 that is accommodated in the housing 31. The housing 31 has a resin housing 31a having a rectangular cross section on the outside, and a metal housing 31b having a rectangular cross section on the inside of the resin housing 31a. A connector board 33 is accommodated in the internal space S of the metal housing 31b. The connector substrate 33 is attached to the metal housing 31b via a heat dissipation sheet 37.

  FIG. 3 is a plan view of the connector substrate 33. As shown in FIG. 3, the electrical input / output unit 32 has a plurality of metal terminals 32a. The metal terminal 32 a is soldered to the distal end side of the connector substrate 33.

  As shown in FIGS. 2 and 3, the control semiconductor 35 and the light emitting / receiving element 36 are mounted on the mounting surface 33 a of the connector substrate 33. The light emitting / receiving elements 36 are light emitting elements 36a1 and 36a2 that emit optical signals in response to electrical signals, and light receiving elements 36b1 and 36b2 that emit electrical signals in response to optical signals. In the following description, when the light emitting elements 36a1, 36a2 and the light receiving elements 36b1, 36b2 are not particularly distinguished, they are simply referred to as the light receiving / emitting element 36.

  The light emitting / receiving element 36 includes a plurality (here, two) of light emitting elements 36a1 and 36a2 and a plurality (here, two) of light receiving elements 36b1 and 36b2. The light emitting elements 36a1 and 36a2 and the light receiving elements 36b1 and 36b2 are arranged in a line on the connector substrate 33 on the optical cable 20 side of the mounting surface 33a. The two light emitting elements 36a1 and 36a2 are provided on the mounting surface 33a on the upper side in FIG. 3, and the two light receiving elements 36b1 and 36b2 are provided on the mounting surface 33a on the lower side in FIG.

  As the light emitting elements 36a1 and 36a2, for example, a light emitting diode (LED: Light Emitting Diode), a laser diode (LD: Laser Diode), a surface emitting laser (VCSEL: Vertical Cavity Surface Emitting LASER), or the like can be used. As the light receiving elements 36b1 and 36b2, for example, photodiodes (PD: Photo Diode) can be used.

  The control semiconductor 35 includes a control circuit 35a in which a driver IC (Integrated Circuit) for driving the light emitting / receiving elements 36a1 and 36a2 and a TIA (Transimpedance Amplifier) for amplifying the output current of the light receiving elements 36b1 and 36b2 are packaged, and a waveform shaping. It comprises a CDR (Clock Data Recovery) device 35b, etc.

  As shown in FIGS. 2 and 3, the light emitting / receiving element 36 is optically connected to the optical fiber core wire 22 of the optical cable 20 via the lens array component 41. The lens array component 41 is disposed on the mounting surface 33a of the connector substrate 33 so as to cover the light emitting / receiving element 36 and the control circuit 35a. As described above, since the plurality of light emitting / receiving elements 36 are formed on the same mounting surface 33 a of the single connector substrate 33, the plurality of light receiving / emitting elements 36 can be obtained simply by mounting the single lens array component 41. Can be optically coupled together.

  The lens array component 41 is a member made of a transparent resin. As shown in FIG. 2, the lens array component 41 includes a plurality of fiber side lens portions 41 a facing the end face of the optical fiber core wire 22 exposed from the fiber support portion 42, and a plurality of elements facing the light emitting / receiving element 36. The side lens part 41b, and the reflective surface 41c which optically connects the fiber side lens part 41a and the element side lens part 41b are provided. The plurality of fiber side lens portions 41 a and element side lens portions 41 b are arranged in an array along the width direction of the lens array component 41, and the reflection surface 41 c is also formed on the upper surface of the lens array component 41 along the width direction. Is formed.

  Light emitted from the light emitting elements 36a1 and 36a2 enters the element side lens unit 41b, is reflected by the reflection surface 41c, and is optically coupled to the optical fiber core wire 22 by the fiber side lens unit 41a. The light emitted from the end face of the optical fiber core 22 enters the lens array component 41 from the corresponding fiber side lens portion 41a, is reflected by the reflection surface 41c, and is reflected by the element side lens portion 41b to the light receiving elements 36b1 and 36b2. Photocoupled. In this way, the plurality of optical fiber core wires 22 and the light emitting / receiving elements 36 are optically connected via the lens array component 41.

  The fiber support portion 42 supports the optical fiber core wire 22 exposed from the end portion of the optical cable 20 and optically connects the optical fiber core wire 22 and the lens array component 41. In the fiber support portion 42, the optical fiber core wire 22 is separated from the optical fiber tape core wire 21 into a single core and supported in a state of being aligned in a row. By attaching the fiber support portion 42 to the connector substrate 33, the optical fiber core wires 22 are attached to the connector substrate 33 in a state of being aligned in a line.

  The plurality of optical fiber core wires 22 are accommodated in the optical cable 20 in a state of being arranged at a first pitch in a predetermined direction. These optical fiber core wires 22 are aligned in a row in the fiber support portion 42 in a state of being expanded to a second pitch larger than the first pitch, and are fixed to the connector substrate 33. In other words, the pitch of the plurality of optical fiber core wires 22 is converted in the fiber support portion 42. As a result, the plurality of optical fiber cores 22 are attached to the respective optical fiber cores 22 corresponding to the positions of the lens portions 41a and 41b of the lens array component 41 formed in accordance with the arrangement of the light receiving and emitting elements 36. The position is adjusted.

  Note that the second pitches of the plurality of optical fiber core wires 22 are not necessarily equal to each other. That is, the second pitch is set according to the pitch of the lens portions 41a and 41b of the light emitting / receiving elements 36 and the lens array component 41 arranged at a pitch larger than the first pitch.

In the present embodiment, the interval between the light emitting elements 36a1 and 36a2 arranged in a line is set to 250 μm, the interval between the light receiving elements 36b1 and 36b2 is set to 250 μm, and the interval between the light emitting element 36a2 and the light receiving element 36b1 is set to 375 μm. Accordingly, the second pitch between the optical fiber cores 22a and 22b (see FIG. 4) is 250 μm, the second pitch between the optical fiber cores 22b and 22c is 375 μm, and the second pitch between the optical fiber cores 22c and 22d. Is set to 250 μm. On the other hand, the first pitch of the optical fiber core wires 22a to 22d is set to 125 μm, which is smaller than the second pitch.
The fiber support portion 42 is provided with a through hole having a diameter that is the same as or slightly larger than that of the optical fiber core wire 22, and the optical fiber core wire 22 is inserted into the through hole and fixed. The fiber support portion 42 is positioned with respect to the lens array component 41 so that the end surface of the optical fiber core wire 22 faces the fiber side lens portion 41a.

  Further, at both ends of the optical cable 20, the outer covering 25 is removed, and the braid 24 is peeled off to expose the optical fiber ribbon 21. Also, the optical cable 20 is fixed to the connector 30 by fixing the peeled braid 24 to a fixing portion 34 provided in the connector 30.

  Further, in the optical connector module 10 according to the present embodiment, as shown in FIG. 2, the fiber support portion 42 holds the optical fiber core wire 22 at the end of the optical cable 20 fixed to the housing 31. The position of the optical fiber core 22 is offset in a direction orthogonal to the arrangement direction of the optical fiber cores 22. That is, in the example of FIG. 2, the position of the optical fiber core wire 22 at the end portion of the optical cable 20 arranged at the first pitch is held by the fiber support portion 42 arranged at the second pitch. The optical fiber core wire 22 is offset from the position of the connector substrate 33 side. For this reason, the optical fiber core wire 22 is disposed in the internal space S in a curved state from the end of the optical cable 20 to the fiber support portion 42.

  According to the connector 30 configured as described above, for example, when an electrical signal is input from the electrical input / output unit 32, the electrical signal is transmitted from the metal terminal 32a to the light emitting elements 36a1 and 36a2 via the CDR device 35b and the control circuit 35a. The light emitting element 36 transmits an optical signal to the optical fiber core wire 22 in accordance with the electrical signal. Conversely, when an optical signal is input from the optical fiber core wire 22, the light receiving elements 36b1 and 36b2 emit an electrical signal corresponding to the optical signal, and the electrical signal is transmitted through the control circuit 35a and the CDR device 35b to the metal terminal 32a. And an electric signal is output from the electric input / output unit 32.

Next, the connection state between the connector 30 and the optical cable 20 will be described with reference to FIG.
First, the connectors of the external devices connected to one and the other end of the optical connector module 10 are designed under the same standard and have the same shape, so the terminal arrangement of the connectors at both ends is inverted. Therefore, in the illustrated example, the first input terminal In1, the second input terminal In2, the first output terminal Out1, and the second output terminal Out2 are arranged in order from the top on one end side, and the top on the other end side. To second output terminal Out2, first output terminal Out1, second input terminal In2, and first input terminal In1. The signal from the first input terminal In1 is transmitted to the first output terminal Out1, and the signal from the second input terminal In2 is transmitted to the second output terminal Out2.

As shown in FIG. 4, the optical connector module 10 of the present embodiment includes a total of four channels including two channels on the transmission side and two channels on the reception side in accordance with the external device.
The channel on the transmission side is a channel for transmitting a signal on one end side to the other end side. The channel on the transmission side is composed of a first channel and a second channel.

  As shown in FIG. 4, in the first channel, an electrical signal is input from the first input terminal In1 on one end side, converted into an optical signal by the light emitting element 36a1 of the connector 30A on one end side, and the optical fiber core 22a is connected. It is transmitted, converted into an electrical signal by the light receiving element 36b1 of the connector 30B on the other end side, and output to the first output terminal Out1 on the other end side.

  In the second channel, an electrical signal is input from the second input terminal In2 on one end side, converted into an optical signal by the light emitting element 36a2 of the connector 30A on one end side, transmitted through the optical fiber core 22b, and a connector on the other end side. It is converted into an electric signal by the light receiving element 36b2 of 30B and output to the second output terminal Out2 on the other end side.

  The channel on the receiving side is a channel that receives a signal from the other end side on one end side. The receiving side channel is composed of a third channel and a fourth channel.

  In the third channel, an electrical signal is input from the first input terminal In1 on the other end side, converted into an optical signal by the light emitting element 36a1 of the connector 30B on the other end side, and transmitted through the optical fiber core 22c. It is converted into an electric signal by the first light receiving element 36b1 and output to the first output terminal Out1 on one end side.

  In the fourth channel, an electrical signal is input from the second input terminal In2 on the other end side, converted into an optical signal by the light emitting element 36a2 of the connector 30B on the other end side, and transmitted through the optical fiber core 22d. It is converted into an electric signal by the second light receiving element 36b2, and is output to the second output terminal Out2 on one end side.

As shown in FIG. 4, the arrangement of the light emitting elements 36a1 and 36a2 and the light receiving elements 36b1 and 36b2 in the light receiving and emitting element 36 of the connector 30A on one end side is the light emitting element 36a1 and light emitting in order from the right when viewed from the optical cable 20. Element 36a2, light receiving element 36b1, and light receiving element 36b2. Also in the connector 30B on the other end side, the light emitting elements 36a1, 36a2 and the light receiving elements 36b1, 36b2 are arranged in order from the right when viewed from the optical cable 20 side, the light emitting element 36a1, the light emitting element 36a2, the light receiving element 36b1, and the light receiving element. 36b2.
Thus, the connector 30A on one end side and the connector 30B on the other end side are configured by the same connector, and the connector 30A on one end side and the connector 30B on the other end side are rotationally symmetric in a horizontal plane.

In the optical fiber ribbon 21, the optical fiber cores 22a, 22b, 22c, and 22d are aligned in this order. Therefore, as shown in FIG. 4, when the optical fiber ribbon 21 is arranged so that the optical fibers 22a, 22b, 22c, and 22d are arranged in order from the right with respect to the connector 30A on one end side, a plurality of optical fibers If the fiber core wires 22 are connected in parallel with the connector 30B on the other end side, the external devices cannot be connected as defined.
For example, the signal of the first input terminal In1 on one end side is output from the second output terminal Out2 on the other end side, and the signal of the second input terminal In2 on one end side is output from the first output terminal Out1 on the other end side. End up. That is, the signal from the first input terminal In1 is not transmitted to the first output terminal Out1.

  Therefore, as shown in FIG. 4, on the other end side, the transmission optical fiber core wires 22a and 22b are twisted 180 degrees when viewed from the connection direction between the fixed portion 34 and the fiber support portion 42. The positions of the optical fiber core 22a and the optical fiber core 22b are interchanged.

  Similarly, the receiving optical fibers 22c and 22d are twisted between the fixing portion 34 and the fiber support portion 42 on the other end side, and the positions of the optical fiber core wire 22c and the optical fiber core wire 22d are switched.

  After the positions are changed in this way, the tips of the optical fiber core wires 22a to 22d are attached to the connector substrate 33 via the fiber support portion 42 in a state of being aligned in a line.

  Therefore, the optical fiber core wires 22 arranged in the order of the optical fiber core wires 22a, 22b, 22c, 22d on one end side are arranged in the order of the optical fiber core wires 22b, 22a, 22d, 22c on the other end side. . As a result, the optical fiber core 22a to output the first channel signal is optically coupled to the light receiving element 36b1 at the other end, and the optical fiber core 22b to output the second channel signal is received at the other end. The optical fiber core 22c that is optically coupled to the element 36b2 and receives the signal of the third channel is optically coupled to the light emitting element 36a1 at the other end, and the optical fiber core 22d that is to receive the signal of the fourth channel is the other. Optically coupled to the light receiving element 36b2 on the end side.

  When the optical fiber core wires 22a to 22d are twisted on the other end side, the optical fiber core wire 22b located on the center side in the optical fiber tape core wire 21 is twisted outward as shown in FIG. It is connected to the light receiving element 36b2. At this time, the optical fiber core wires 22b are wired in parallel.

  Moreover, the optical fiber core wire 22a located outside the optical fiber tape core wire 21 is twisted inward and connected to the light receiving element 36b1. At this time, the optical fiber core wire 22a is bent when it crosses over the optical fiber core wire 22b, so that a curved portion 26 is formed.

  Here, the distance (first pitch) between the optical fiber cores 22 a and 22 b in the optical fiber tape core 21 is greater than the distance (second pitch) between the optical fiber cores 22 a and 22 b in the fiber support portion 42. Is too narrow. For this reason, when both the optical fiber core wires 22a and 22b are linearly connected from the optical fiber tape core wire 21 to the fiber support portion 42 on the other end side, the optical fiber core positioned outside in the fiber support portion 42. The optical path length of the wire 22b is longer than the optical path length of the optical fiber core wire 22a located inside the fiber support portion 42.

  Therefore, as shown in FIG. 5, when the optical fiber core 22a is bent and wired, the optical fiber core 22a becomes longer by the amount of the bending portion 26, and the optical fiber core 22b and the optical fiber 22a are separated. The difference in length has been reduced. As a result, the optical path length difference between the plurality of optical fiber cores 22a to 22d is reduced, and the occurrence of a phenomenon (skew) in which the signal arrival timing between channels is different is suppressed. As a result, transmission of the optical connector module 10 Quality has been improved.

  Similarly, the optical fiber core wire 22c located on the center side in the optical fiber ribbon 21 is twisted outward and connected linearly to the light emitting element 36a1. Further, the optical fiber core 22d positioned on the outer side of the optical fiber ribbon 21 is twisted inward and curved to be connected to the light emitting element 36a2. Thereby, the optical path lengths of the optical fiber core 22c and the optical fiber core 22d are made substantially equal.

  In the present embodiment, the region aligned with the first pitch of the optical fiber core wire 22 and the region aligned with the second pitch (the region supported by the fiber support portion 42) are light beams. It is offset in a direction perpendicular to the arrangement direction of the fiber core wires 22, and it is easy to secure an extra length region for twisting the optical fiber as described above.

  As described above, according to the optical connector module 10 according to the first embodiment described above, the transmission optical fiber cores 22a and 22b and the reception optical fiber core wires 22c and 22d are respectively connected from one end side to the other end side. Since the arrangement order is reversed so that the arrangement order is reversed, the arrangement order of the transmission optical fiber cores 22a and 22b and the arrangement of the reception optical fiber core lines 22c and 22d are arranged on one end side and the other end side. The order is reversed.

  For this reason, since the same connector board | substrate 33 can be used for the both ends of the optical cable 20, a manufacturing cost can be reduced. Further, the optical connector module 10 can be easily assembled because the arrangement order of the optical fiber core wires 22 on the one end side and the other end side can be made the same by a simple method of twisting so that the arrangement order is reversed. The manufacturing cost can be reduced.

  In addition, since the plurality of transmission optical fiber cores 22a and 22b and the plurality of reception optical fiber cores 22c and 22d are bundled to form the optical fiber tape core 21, it is resistant to side pressure. The high optical connector module 10 can be provided.

  Further, the transmission optical fiber cores 22a and 22b and the reception optical fiber cores 22c and 22d are both twisted at the other end. For this reason, an operator can twist both optical fibers without distinguishing between the transmission optical fibers 22a and 22b and the reception optical fibers 22c and 22d at the time of manufacture, so that the operation is easy.

(Second Embodiment)
Next, an optical connector module according to a second embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the site | part which is common in the optical connector module 10 which concerns on 1st Embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  FIG. 6 is a plan view showing the connection between the light emitting / receiving element 36 and the optical fiber core wire 22 in the optical connector module 10A according to the second embodiment. As shown in FIG. 6, in the optical connector module 10A according to the second embodiment, the transmission optical fiber cores 22a and 22b are twisted on the other side, and the reception optical fiber cores 22c and 22d are Twisted on one side.

  Thus, even if the optical fiber cores 22a and 22b for transmission and the optical fiber cores 22c and 22d for reception are twisted at different locations on one side and the other side, one end side and the other end The arrangement order of the transmission optical fiber cores 22a and 22b and the arrangement order of the reception optical fiber cores 22c and 22d can be reversed.

  For this reason, since the same connector board | substrate 33 can be used for the both ends of the optical cable 20, a manufacturing cost can be reduced. Further, the optical connector module 10 can be easily assembled because the arrangement order of the optical fiber core wires 22 on the one end side and the other end side can be made the same by a simple method of twisting so that the arrangement order is reversed. The manufacturing cost can be reduced.

  Further, when creating the optical connector module 10A according to the present embodiment, the operator can connect the transmission optical fiber 22 or the reception optical fiber 22 without distinguishing between the one end side and the other end side. Since it is sufficient to twist, manufacturing is easy. That is, since it is twisted at different locations on one side and the other side, when the connector board 33 is directed in a predetermined direction, the same side of the optical fiber core 22 for transmission or the optical fiber core 22 for reception is attached. Since it is sufficient to twist, the operator does not need to distinguish one end side and the other end side.

The optical connector module of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
For example, in each of the above-described embodiments, the case where the optical cable 20 having the four-fiber optical fiber ribbon 21 is used has been described. However, the present invention can be similarly applied to the case where four or more optical fiber ribbons are used. is there. Further, the optical cable 20 may be configured to include an electric wire in addition to the optical fiber core wire.

10: optical connector module, 20: optical cable, 21: optical fiber ribbon, 22: optical fiber, 30: connector, 30A: one end connector, 30B: other end connector, 33: connector board, 36: receiving Light emitting element, 41: lens array component

Claims (5)

An optical connector module for mutually transmitting optical signals between one end side and the other end side,
An optical cable having a plurality of transmission optical fibers that transmit optical signals from one end side to the other end side, and a plurality of reception optical fibers that transmit optical signals from the other end side to one end side;
A connector substrate having a light emitting element and a light receiving element that are optically coupled to the transmitting optical fiber and the receiving optical fiber, respectively, on the same surface of a single substrate;
On one end side and the other end side, the plurality of transmission optical fibers and the plurality of reception optical fibers are attached to the connector board in a state of being aligned in a line,
The plurality of transmission optical fibers and the plurality of reception optical fibers are respectively twisted so that the arrangement order differs from one end side to the other end side so that the arrangement order of the channels at one end and the other end is aligned. And an optical connector module attached to the optical connector.   Each of the plurality of transmission optical fibers and the plurality of reception optical fibers is attached to the optical connector by being twisted so that the arrangement order is reversed from one end side to the other end side. The optical connector module according to claim 1. The plurality of transmission optical fibers and the plurality of reception optical fibers are both twisted on one side, or one of the plurality of transmission optical fibers and the plurality of reception optical fibers is on one side. The optical connector module according to claim 1 , wherein the other of the plurality of transmission optical fibers and the plurality of reception optical fibers is twisted on the other side . The plurality of transmission optical fibers and the plurality of reception optical fibers are accommodated in the optical cable in a state of being aligned with a first pitch in a predetermined direction, and are wider than the first pitch in the predetermined direction. Fixed to the connector board in a line with a pitch of 2;
A plurality of the transmission optical fibers and a plurality of the reception optical fibers twisted so that the arrangement order is reversed, the transmission optical fiber and the reception are located outside in an area aligned with the first pitch. Optical fiber is twisted inward and fixed to the connector board,
The transmitting optical fiber and the receiving optical fiber positioned outside in the region aligned with the first pitch are moved in the predetermined direction when overcoming the transmitting optical fiber and the receiving optical fiber positioned inside. 4. The optical connector module according to claim 1, wherein a curved portion is formed in a direction perpendicular to the optical connector module.   Regarding the plurality of transmission optical fibers and the plurality of reception optical fibers, the region aligned with the first pitch and the region aligned with the second pitch are offset in a direction perpendicular to the predetermined direction. The optical connector module according to claim 4, wherein the curved portion is formed toward the offset direction.

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