JP4945965B2 - Optical fiber terminal with photoelectric conversion function and mounting method thereof - Google Patents

Description

  The present invention relates to an optical fiber terminal with a photoelectric conversion function and a mounting method thereof, for example, an optical fiber terminal with a photoelectric conversion function in which an optical fiber is connected to a photoelectric conversion element and a mounting method thereof.

Conventionally, an optical connection component for connecting an optical fiber to a light emitting / receiving element is known (see, for example, Patent Document 1).
As shown in FIG. 4, the optical connection component 100 described in Patent Document 1 has a ferrule 101, and a plurality of fiber holes 102 for positioning and holding the optical fiber are formed in the ferrule 101. On the outer surface of the ferrule 101, a plurality of metal plating portions 103 for performing electrical wiring are formed corresponding to each fiber hole 102. Each metal plating portion 103 continuously extends from the lower surface 101c of the ferrule 101 to the upper surface 101d through the front surface 101a. Ferrule 101 is formed of a material containing any of polyester resin, PPS resin, and epoxy resin.
Japanese Patent Laying-Open No. 2005-115284

  By the way, in the optical connection component as described in Patent Document 1 described above, the ferrule connected with the optical fiber is positioned and fixed to the light emitting / receiving element (optical device) mounted on the substrate. It has been broken. In this case, when solder or an adhesive is used for fixing the ferrule, heating by the solder, leakage of the adhesive, heating for curing the adhesive, or the like adversely affects other components.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an optical fiber terminal with a photoelectric conversion function that can be mounted on a substrate while preventing adverse effects due to heat, adhesive leakage, and the like, and the mounting thereof. It is to provide a method.

  In order to achieve the above-mentioned object, the first feature of the optical fiber terminal with a photoelectric conversion function according to the present invention is provided with a guide hole for positioning and guiding the optical fiber, and at one end surface where the guide hole opens. An optical head plug integrally provided with a photoelectric conversion element unit including a photoelectric conversion element is provided, and the optical head plug has a plug-side electric wiring portion connected to an electrode terminal of the photoelectric conversion element on an outer surface of the plug. Then, the optical head plug is configured to be able to be connected to a receiving portion side electric wiring portion provided in a receiving portion that is detachably formed.

  In the thus configured optical fiber terminal with a photoelectric conversion function, the photoelectric conversion element and the optical fiber of the photoelectric conversion element unit provided in the opening of the guide hole by inserting the optical fiber into the guide hole in the optical head plug It is connected. And since the plug-side electric wiring portion connected in conductive contact with the electrode terminal of the photoelectric conversion element is provided to extend to the outer surface of the optical head plug, the electrode can be obtained by inserting the optical head plug into the receiving portion. The terminal is connected to the receiving part side electric wiring part via the plug side electric wiring part. For this reason, the optical fiber terminal can be mounted on the substrate while preventing adverse effects due to heat, adhesive leakage, and the like. Further, the optical fiber terminal can be easily detached from the substrate.

  A second feature of the optical fiber terminal with a photoelectric conversion function according to the present invention is that, in the first feature of the present invention, at least one of the plug-side electric wiring portion and the receiving portion-side electric wiring portion has an elastic force. It has to be in contact with the other.

  In the optical fiber terminal with a photoelectric conversion function configured as described above, by inserting the optical head plug into the receiving portion, both the electric wiring portions are caused by the elastic force of the plug-side electric wiring portion or the receiving portion-side electric wiring portion. It will be easily connected.

  A third feature of the optical fiber terminal with a photoelectric conversion function according to the present invention is that, in the first feature of the present invention, the optical fiber is a multimode fiber.

  In the thus configured optical fiber terminal with a photoelectric conversion function, by using a multi-mode fiber, a photoelectric conversion element provided in the opening of the guide hole by inserting the optical fiber into the guide hole in the optical head plug and When connecting, since a slight misalignment is allowed, the connection becomes easy.

  A fourth feature of the optical fiber terminal mounting method according to the present invention is that, in any one of the first to third features of the present invention described above, a guide hole for guiding the optical fiber is provided. An optical head plug equipped with a photoelectric conversion element unit is attached to an optical fiber on one end face that opens, and a receiving portion that allows the optical head plug to be fitted is mounted on a substrate, and the receiving device mounted on the substrate is mounted. By fitting the optical head plug into the portion, the plug-side electric wiring portion formed on the outer surface of the plug and the receiving portion-side electric wiring portion formed on the receiving portion are brought into conductive contact.

  In the optical fiber terminal mounting method configured as described above, the optical head plug having the photoelectric conversion element and the optical fiber connected to each other is inserted by being inserted into the receiving portion mounted on the substrate. Can be connected without using solder or adhesive. For this reason, it is possible to easily mount the optical fiber terminal on the substrate while preventing adverse effects due to heat, adhesive leakage, and the like. It can also be easily removed.

  According to the present invention, the optical head plug having the photoelectric conversion element and the optical fiber connected to each other is detachably fitted and connected by being inserted into the receiving portion mounted on the substrate. As described above, it is possible to obtain an effect that the optical fiber terminal can be mounted on the substrate while preventing adverse effects due to heat, adhesive leakage, and the like that occur when connecting using solder or an adhesive.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.
1A is a cross-sectional view showing an embodiment of an optical fiber terminal with a photoelectric conversion function of the present invention, FIG. 1B is an enlarged cross-sectional view of a portion B in FIG. 1A, and FIG. 1B is a perspective view of an optical head plug including a photoelectric conversion element unit, and FIG. 3 is a state in which the optical head plug is connected to a receiving portion mounted on a substrate. FIG.

  As shown in FIGS. 1A, 1 </ b> B, and 1 </ b> C, an optical fiber terminal 10 with a photoelectric conversion function according to an embodiment of the present invention includes a guide hole 21 that positions and guides an optical fiber 11. The optical head plug 20 is integrally provided with the photoelectric conversion element unit 30 including the photoelectric conversion element 31 on the front face 22 which is one end face where the guide hole 21 is opened 21a. The optical head plug 20 is provided with a plug-side electric wiring portion 25 connected to a bump contact portion 32 serving as an electrode terminal of the photoelectric conversion element 31 on an upper surface 23 that is an outer surface of the plug. However, the optical head plug 20 can be electrically connected to the receiving portion side electric wiring portion 41 provided in the receiving portion 40 that is detachably formed.

As shown in FIG. 2, a plurality of optical fibers 11 (here, for example, four) are juxtaposed and coated with a tape coating 12 a to form a tape core wire 12.
As the optical fiber 11, it is desirable to use a multimode optical fiber. For example, a core having a diameter of 50 μm, a cladding diameter of 80 μm, and a coating outer diameter of 125 μm can be used. By using a multimode optical fiber, the optical fiber 11 can be attached to the optical head plug 20 with a slight misalignment.

As shown in FIG. 2, the optical head plug 20 is provided with guide holes 21 for positioning the distal end portion 11a through the optical fiber 11 at a pitch of, for example, 250 μm. It is fixed to the optical head plug 20 with a curable adhesive. Further, as shown in FIG. 1, the optical fiber 11 has a distal end portion 11 a inserted into the guide hole 21 of the optical head plug 20, and the distal end surface 11 b is slightly recessed inward from the front surface 22 of the optical head plug 20. And is optically coupled to the photoelectric conversion element 31.
Therefore, even if the optical fiber 11 is inserted into the guide hole 21, the tip end face 11b does not contact the photoelectric conversion element 31, so that the optical fiber 11 or the photoelectric conversion element 31 can be prevented from being damaged. ing.

As shown in FIGS. 1A and 1B, the distal end portion 11a of the optical fiber 11 is inserted into the guide hole 21 of the optical head plug 20 without being covered. Thereby, the trouble of removing the coating can be saved and the operation can be performed easily and quickly. Further, when the distal end surface 11b of the optical fiber 11 is inserted into the guide hole 21 of the optical head plug 20, it is possible to prevent the optical fiber 11 from being damaged by hitting the corner of the guide hole 21.
The guide hole 21 is provided with a recess 21b of a size that fits the tape core 12 at the rear end (right end in FIG. 1A) corresponding to the entire width of the tape core 12. May be formed from the tip of the recess 21b. In this case, the tape core wire 12 can be securely fixed to the optical head plug 20 by adhering the tape core wire 12 to the recess 21b.

  In the photoelectric conversion element unit 30, a plurality (here, for example, four) of photoelectric conversion elements 31 are arranged in an array in accordance with the pitch of the guide holes 21. The photoelectric conversion element 31 is typically a surface emitting laser (VCSEL) when used as a light source unit, and a photodetector (PD) when used as a light receiving unit. The arrangement pitch can be set to, for example, 250 μm in accordance with the pitch of the guide holes 21, but may be larger or smaller as long as it is equal to the pitch of the guide holes 21. In addition, the photoelectric conversion element unit 30 provided with the photoelectric conversion element 31 is provided integrally with the optical head plug 20 in advance. At this time, if the light source is a light source, the light emitting surface is provided. Are adjusted so as to correspond to the openings 21a of the guide holes 21 as light emitting / receiving portions 31a.

Further, as shown in FIGS. 1B and 1C, bump contact portions serving as electrode terminals for supplying power to and extracting signals from the photoelectric conversion element 31 attached to the photoelectric conversion element unit 30. 32 is exposed on the element-side adhesive surface 30 a facing the optical head plug 20 in the photoelectric conversion element unit 30.
On the other hand, on the front surface 22 of the optical head plug 20 facing the element-side adhesive surface 30a, an electrical wiring portion 24 with which electrode terminals are conductively connected is exposed. As shown in FIGS. 1B and 1C, the electric wiring portion 24 extends from the front surface 22 of the optical head plug 20 to the upper surface 23 that is the outer surface of the plug, and is extended to the plug-side electric wiring portion 25. Is forming.

As shown in FIG. 1 (A), the receiving portion 40 on which the optical head plug 20 is detachably attached has a receiving portion side that can be connected to the plug-side electric wiring portion 25 provided on the optical head plug 20. An electrical wiring portion 41 is provided. One end of the receiving portion side electric wiring portion 41 is connected to a wiring pattern (not shown) formed on the substrate 42, and the other end is provided to extend above the receiving space of the receiving portion 40.
In order to ensure the conduction between the electric wiring portions 25 and 41, at least one of the plug-side electric wiring portion 25 and the receiving portion-side electric wiring portion 41 (for example, the plug-side electric wiring portion 25 in FIG. 1A). ) Has an elastic force so as to be brought into contact with the other. Therefore, the plug-side electric wiring portion 25 and the receiving portion-side electric wiring portion 41 are surely brought into conduction only by inserting the optical head plug 20 into the receiving space 40 a of the receiving portion 40. Further, as shown in FIG. 1B, when the distal end portion 25a of the plug-side electric wiring portion 25 is bent downward, the optical head plug 20 can be smoothly taken out from the receiving portion 40.

Next, a method for mounting an optical fiber terminal with a photoelectric conversion function according to the present invention will be described.
In this mounting method, a guide hole 21 for guiding the optical fiber 11 is provided, and an optical head plug 20 equipped with a photoelectric conversion element unit 30 is attached to the optical fiber 11 on the front surface 22 which is one end surface where the guide hole 21 opens. The receiving portion 40 that can be fitted with the optical head plug 20 is mounted on the substrate 42, and the optical head plug 20 is fitted into the receiving portion 40 that is mounted on the substrate 42. The plug-side electric wiring part 25 formed on the receiving part and the receiving part-side electric wiring part 41 formed on the receiving part 40 are brought into conductive contact with each other.

  That is, in the method for mounting an optical fiber terminal with a photoelectric conversion function according to the present invention, the optical head plug 20 connecting the photoelectric conversion element 31 and the optical fiber 11 is inserted into the receiving portion 40 mounted on the substrate 42. Thus, the optical head plug 20 is connected and connected to the substrate 42, so that the connection can be made without using solder or adhesive. For this reason, it is possible to easily mount the optical fiber terminal on the substrate while preventing adverse effects due to heat, adhesive leakage, and the like. It can also be easily removed.

As described above, the optical fiber terminal with a photoelectric conversion function and the mounting method according to the present invention are provided in the opening 21 a of the guide hole 21 by inserting the optical fiber 11 into the guide hole 21 in the optical head plug 20. The photoelectric conversion element 31 of the photoelectric conversion element unit 30 and the optical fiber 11 can be connected. Then, by inserting the optical head plug 20 into the receiving portion 40 mounted on the substrate 42, the plug-side electric wiring portion 25 connected to the bump contact portion 32 of the photoelectric conversion element 31 is connected to the optical head plug 20. Since it is provided on the upper surface 23, the bump contact portion 32 serving as an electrode terminal is connected to the receiving portion side electric wiring portion 41 via the plug side electric wiring portion 25. For this reason, the optical fiber terminal can be mounted on the substrate while preventing adverse effects due to heat, adhesive leakage, and the like.
Although not shown in the figure, the optical head plug 20 is locked by a claw or the like when fitted to the receiving portion 40 so as not to be separated from each other. Further, the optical head plug 20 can be removed from the receiving portion 40 by removing the claw.

The optical fiber terminal with a photoelectric conversion function and the mounting method thereof according to the present invention are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.
That is, in the above-described embodiment, when the optical head plug 20 is inserted into the receiving portion 40, the receiving portion side on the receiving portion 40 side is biased by the upward biasing force of the plug-side electric wiring portion 25 on the optical head plug 20 side. Instead of this, the electrical wiring part 41 may be guided and replaced by a downward biasing force of the receiving part side electrical wiring part 41. Alternatively, it can be guided by both biasing forces.

  As described above, in the optical fiber terminal with a photoelectric conversion function and the mounting method thereof according to the present invention, the optical head plug connecting the photoelectric conversion element and the optical fiber is inserted into the receiving portion mounted on the substrate. Since the connection is performed by fitting, the optical fiber terminal can be mounted on the substrate while preventing adverse effects due to heat, adhesive leakage, etc. that occur when connecting using solder or adhesive as in the past. It has an effect and is useful as an optical fiber terminal with a photoelectric conversion function in which an optical fiber is connected to a photoelectric conversion element, a mounting method thereof, and the like.

(A) is sectional drawing which shows embodiment which concerns on the optical fiber terminal with a photoelectric conversion function of this invention. (B) is an expanded sectional view of B part in (A). (C) is an enlarged view showing a main part of (B). It is a perspective view of an optical head plug. It is a perspective view which shows the state which connects an optical head plug to the receiving part mounted in the board | substrate. It is a perspective view which shows the conventional optical connection component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Optical fiber terminal 11 Optical fiber 20 Optical head plug 21 Guide hole 21a Opening 22 Front surface (one end surface)
23 Upper surface (plug outer surface)
25 Plug side electric wiring part 30 Photoelectric conversion element unit 31 Photoelectric conversion element 32 Bump contact part 40 Receiving part 41 Receiving part side electric wiring part 42 Substrate

Claims (3)

A guide hole for positioning and guiding the optical fiber, and an optical head plug integrally equipped with a photoelectric conversion element unit provided with a photoelectric conversion element on the front surface, which is one end face where the guide hole opens,
The optical head plug, the plug-side electric wiring portion for connecting the electrode terminals of the pre-Symbol photoelectric conversion element is disposed bent multiple parallel over the outer surface adjacent to the front from the front floating Rutotomoni, from the outer surface The plug-side electric wiring portion is elastic on the outer surface with respect to the receiving portion-side electric wiring portion provided in the receiving portion that is bent toward the outer surface in a state where the optical head plug is detachably formed. Optical fiber terminal with photoelectric conversion function that conducts and contacts.   The optical fiber terminal with a photoelectric conversion function according to claim 1, wherein the optical fiber is a multimode fiber. A guide hole for guiding the optical fiber is provided, and an optical head plug equipped with a photoelectric conversion element unit is attached to the front surface, which is one end face where the guide hole opens, and the optical head plug can be fitted. A plurality of receiving portions are mounted on the substrate, and the optical head plug is fitted into the receiving portion mounted on the substrate so that a plurality of the optical head plugs are arranged in parallel from the front surface to the outer surface adjacent to the front surface. the folded and disposed to plug-side electric wiring section that is bent toward the outer surface in a state of floating from Rutotomoni said outer surface, with respect to the receiving side electric wiring portion formed in the receiving portion, in the outer surface A method of mounting an optical fiber terminal, wherein the optical fiber terminal is brought into contact with elasticity.

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