JP2012185283A - Multi-fiber optical connector, manufacturing method for multi-fiber optical connector, and alignment member for manufacturing multi-fiber optical connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-fiber optical connector that enables a ferrule to be formed without use of core pins and has also high accuracy for positioning fibers, a manufacturing method for the multi-fiber optical connector, and an alignment member for manufacturing the multi-fiber optical connector.SOLUTION: In an alignment member 17, the side of holes 19 thereof is made to be faced to a ferrule 5, and guide holes 11 of the ferrule 5 have guide pins 21 of the alignment member 17 inserted thereinto. Then, optical fibers 9 are wholly inserted into the corresponding holes 19, so that the optical fibers 9 are restricted at the position of the holes 19, and namely, can be made to be aligned with the almost same accuracy as the holes 19. In such state, an adhesive 13 is made to be hardened, so that the optical fibers 9 are fixed in the ferrule 5 (to the inner surface of an elongated hole 7).

Description

  The present invention relates to a multi-fiber optical connector in which a plurality of fiber core wires are arranged and inserted in a resin ferrule, a method for manufacturing the multi-fiber optical connector, and an alignment member for manufacturing the multi-fiber optical connector.

  2. Description of the Related Art Conventionally, a multi-fiber optical connector in which a plurality of optical fiber cores are aligned and inserted into a resin ferrule has been used.

  For example, an optical fiber connector formed by peeling off the coating on the tip of the optical fiber tape and inserting and fixing each optical fiber exposed from the end into a ferrule having holes formed at a predetermined pitch in advance. Yes (Patent Document 1).

  Further, there is a fiber array member formed by inserting an optical fiber tape itself into a ferrule in which a long hole is formed in advance (Patent Document 2).

JP 2002-46049 A JP 2010-266826 A

  Such a ferrule of a multi-fiber optical connector is usually formed by injection molding, but high positional accuracy of the optical fiber core wire is required. For this reason, a special high-hardness resin containing a glass filler or the like is used. Therefore, cost is high and moldability is bad.

  However, in order to form holes with a predetermined interval as in Patent Document 1, it is necessary to use a highly accurate core pin as a mold. However, in combination with the use of a special resin as described above, the core pin is broken. There is a fear. For this reason, the ferrule productivity is poor and extremely expensive.

  However, as in Patent Document 2, if the optical fiber tape itself is inserted by forming a long hole, the positional accuracy of the optical fiber core wire depends on the positional accuracy in the optical fiber tape. It is difficult to apply to high positional accuracy such as

  The present invention has been made in view of such a problem, and can form a ferrule without using a core pin, and has a multi-fiber optical connector excellent in fiber position accuracy, a multi-fiber optical connector manufacturing method, and An object of the present invention is to provide an alignment member for manufacturing a multi-fiber optical connector.

  In order to achieve the above-described object, a first invention is a method for manufacturing a multi-fiber optical connector, wherein a ferrule having a long hole into which a tape core wire can be inserted is used, and the long surface is formed from one end face of the ferrule. The tape core wire is inserted into the hole, and the coating removal portion from which the tape and the coating at the end of the tape core wire are removed protrudes from the other end surface of the ferrule so that the coating removal portion can be aligned at a predetermined pitch. Using an alignment member, the guide mechanism adjusts the relative position between the ferrule and the alignment member, and inserts the tip of the sheath removal portion into the alignment portion formed on the alignment member, and attaches the alignment member to the ferrule. The cover removing portion is fixed in the elongated hole by an adhesive applied to the gap between the elongated hole and the sheath removing portion, the alignment member is removed, and the front of the ferrule is removed. Is a multi-fiber optical connector manufacturing method characterized by polishing the other end face.

  When the alignment member and the ferrule are opposed to each other, the relative positions of the alignment member and the ferrule are aligned with each other in a state where a gap is formed between the opposing surfaces of the alignment member and the ferrule. It is desirable to fix.

  The alignment portion of the alignment member is a plurality of holes arranged at a predetermined pitch into which tips of the coating removal portion can be inserted corresponding to the outer diameter of the coating removal portion. The vertical and horizontal positions may be regulated by the alignment unit. In addition, a height of a tip portion of the elongated hole is a height corresponding to an outer diameter of the coating removal portion, and the alignment portion of the alignment member corresponds to the outer diameter of the coating removal portion. A plurality of grooves arranged at a predetermined pitch into which the front ends of the removal parts can be inserted, and the positions of the grooves in the arrangement direction of the coating removal parts are regulated by the alignment parts, and the coating removal parts The position in the direction perpendicular to the arrangement direction of the grooves may be regulated by the elongated holes.

  It is desirable that the end portion of the alignment portion on the side facing the ferrule has a tapered shape whose diameter increases toward the end portion.

  According to the first invention, since it is a long hole that is formed in the ferrule, it is not necessary to use a core pin during manufacturing. Therefore, there is no fear of breakage of the core pin. Moreover, since the fiber core wire is fixed to the ferrule in a state where the fiber core wires are aligned using the alignment member, the position of the optical fiber core wire can be regulated by the alignment member. For this reason, unlike the prior art, the ferrule itself does not require high accuracy. Therefore, a general resin can be used without using a special resin. For this reason, it is excellent in manufacturability and a multi-fiber optical connector can be manufactured at low cost.

  In addition, since the alignment member and the ferrule are positioned by the guide mechanism, the optical fiber can be reliably aligned at a predetermined position of the ferrule. Further, when the alignment member is opposed to the ferrule, a gap is formed between the opposing surfaces to prevent the adhesive that fixes the optical fiber core wire and the ferrule from adhering to the alignment member. Can do.

  Moreover, if the hole formed in the alignment state of the optical fiber core wire is formed as the alignment portion, and the tip of the optical fiber core wire is inserted into the hole, the optical fiber core wire arrangement direction and two directions perpendicular thereto Can be regulated by the alignment member. In addition, by making the height of the tip of the long hole correspond to the outer diameter of the optical fiber core wire, the position of the optical fiber core wire in the direction perpendicular to the arrangement direction can be regulated by the long hole tip. For this reason, as an alignment part, it can also be set as a groove instead of a hole.

  In addition, by making the end portion of the alignment portion facing the ferrule the tapered shape that increases in diameter as it goes to the end portion, it becomes easy to insert the tip of the optical fiber core wire into the alignment portion, Even when the adhesive swells to the alignment member side due to surface tension, it is possible to prevent the adhesive from adhering to the alignment member.

  A second invention is an alignment member used in the manufacture of a multi-fiber optical connector, and is composed of a plurality of holes or grooves having a predetermined pitch into which a coating removal portion from which the coating of an optical fiber to be aligned is removed can be inserted. A convex step is formed on the end surface on the insertion side of the coating removal portion, and when facing the ferrule to which the optical fiber is fixed, a gap is formed between the end surface of the ferrule. The alignment member for manufacturing a multi-fiber optical connector can be formed, and an end portion on the insertion side of the covering removal portion of the alignment portion has a tapered shape whose diameter increases toward the end portion.

  According to the second invention, the optical fiber core wires can be reliably aligned with high accuracy. At this time, since a step is formed on the ferrule facing surface side, a gap can be formed between the ferrule facing surface and the ferrule facing surface. For this reason, it can prevent that the adhesive agent for fixing an optical fiber core wire adheres to an alignment member.

  3rd invention is a multi-fiber optical connector, Comprising: The ferrule holding an optical fiber, The elongate hole in which the taper part which is provided in the said ferrule and in which at least one part width | variety reduces diameter is formed, and a tape core The tape integrated portion is inserted up to the taper portion of the elongated hole, and from the taper portion to the end surface of the ferrule, a coating removal portion from which the tape and coating of the tape core wire are removed is provided, and the coating removal portion A gap is formed over the entire circumference between the outer circumferential surface of the elongated hole and the inner circumferential surface of the elongated hole, the gap is filled with an adhesive, and the covering removal portion is inserted into the elongated hole via the adhesive. It is a multi-fiber optical connector characterized by being fixed to.

  According to the third invention, since the long hole is formed in the ferrule, it is inexpensive, and the optical fiber core wire is fixed via the adhesive without contacting the long hole of the ferrule. For this reason, since the ferrule itself does not require high accuracy, no special resin is required. For this reason, an inexpensive multi-fiber optical connector can be obtained.

  According to the present invention, a ferrule can be formed without using a core pin, and a multi-fiber optical connector excellent in fiber positional accuracy, a multi-fiber optical connector manufacturing method, and an alignment member for manufacturing a multi-fiber optical connector are provided. Can be provided.

It is a figure which shows the multi-fiber optical connector 1, (a) is a perspective view, (b) is the sectional view on the AA line of (a). (A) is the BB sectional drawing of Fig.1 (a), (b) is sectional drawing of the multi-fiber optical connector 1a in the same visual field as (a). The figure which shows the state which inserts the optical fiber 9 in the ferrule 5. FIG. The figure which shows an example of the application | coating process of the adhesive agent 13. FIG. It is a figure which shows the alignment member 17, (a) is a perspective view, (b) is the F section expanded sectional view of (a). The figure which shows the state which attaches the alignment member 17 to a ferrule. The figure which shows the state which attached the alignment member 17a to the ferrule. (A) is a figure which shows the state which attached the alignment member 17b to the ferrule, (b) is the H section enlarged view of (a). The figure which shows the state which grind | polishes the front-end | tip of the ferrule 5. FIG. (A) is a perspective view which shows the state which attaches the alignment member 30 to the ferrule 5, (b) is a front view. (A) is sectional drawing which shows the state which inserted the optical fiber 9 in the ferrule 5, (b) is the K section enlarged view of (a). (A) is a figure which shows the alignment member 40, (b) is a figure which shows the use condition of the alignment member 40. FIG. The figure which shows the state which inserted the optical fiber 9 in the alignment member 40. FIG.

  Hereinafter, a multi-fiber optical connector 1 according to an embodiment of the present invention will be described. 1A is a perspective view showing the multi-fiber optical connector 1, FIG. 1B is a cross-sectional view taken along the line AA in FIG. 1A, and FIG. 2A is a cross-sectional view taken along the line B- in FIG. It is B line sectional drawing.

  The multi-fiber optical connector 1 is fixed by inserting a tape core wire 3 into a resin ferrule 5. The ferrule 5 is formed with a long hole 7 penetrating in the longitudinal direction. The long hole 7 may be any size as long as the tape core wire 3 can be inserted, but is set so as not to cause a large clearance with respect to the tape core wire 3. A guide hole 11 as a guide mechanism is provided on the end face of the ferrule 5. The position, size, shape and the like of the guide hole 11 are not limited to the illustrated example.

  The tape core wire 3 inserted into the ferrule 5 is composed of a tape integrated portion 9a covered with a tape (and a covering portion), and a covering removing portion 9b where the tape and the covering are removed at the tip side and the optical fiber 9 is exposed. Composed. The optical fiber 9 has a diameter of 125 μm, for example, and is 250 μm at the covering portion. Accordingly, the optical fibers 9 are arranged at a pitch of approximately 250 μm in the coating removal portion 9b.

  The outer periphery of the optical fiber 9 is provided with an adhesive 13 over the entire periphery, and is fixed to the inner surface of the long hole 7. That is, the optical fiber 9 does not directly contact the long hole 7. In addition, about arrangement | positioning, the number, etc. of the optical fiber 9, it is not restricted to the illustrated example.

  In the present invention, a multi-fiber optical connector 1a as shown in FIG. In the multi-fiber optical connector 1a, a tapered portion 15 having a diameter reduced as the width of the long hole 7 of the ferrule 5 reaches the tip is formed. The tapered portion 15 is formed such that the tip width of the long hole 7 is narrower than the width of the tape integrated portion 9 a and wider than the alignment width of the optical fibers 9. That is, the tape integrated portion 9a is inserted up to the taper portion 15 and is not inserted further. Moreover, the optical fiber 9 and the long hole 7 do not contact. By doing in this way, it is prevented that a tape core wire is inserted excessively, and the length of a coating removal part can be made constant.

  Next, a method for manufacturing the multi-fiber optical connector 1 will be described. First, as shown in FIG. 3 (a), the tape core wire 3 in which the tape and covering at the tip portion are removed in advance to form the covering removing portion 9b is inserted into the slot 7 from the rear end of the ferrule 5 (see FIG. Middle arrow C direction). At this time, as shown in FIG. 3B, the optical fiber 9 is projected from the front of the long hole 7 by a predetermined length.

  Next, the adhesive 13 is applied to the tip of the ferrule 5. At this time, as shown in FIG. 4, first, the optical fiber 9 is protruded from the ferrule 5 longer than the specified length (in the direction of arrow D in the figure), and the adhesive 13 is applied. Next, the tape core wire 3 is pulled back from the ferrule 5 (in the direction of arrow E in the figure). At this time, the adhesive 13 attached around the optical fiber 9 is drawn into the elongated hole 7. By doing in this way, the adhesive agent 13 can be apply | coated inside the long hole 7. FIG. The method for applying the adhesive 13 is not limited to the method described above. For example, an adhesive may be poured from a hole communicating with the long hole 7 formed in the ferrule 5, or the optical fiber 9 may be inserted after the adhesive 13 is applied in advance.

  5A and 5B are diagrams showing the alignment member 17, in which FIG. 5A is a perspective view, and FIG. 5B is an enlarged view of a portion F in FIG. 5A. The alignment member 17 is, for example, a resin member, and a plurality of holes 19 are aligned and arranged at a predetermined pitch on one end surface. In addition, the hole 19 which is an alignment part may be a through-hole, and may be formed with predetermined depth. Guide pins 21 that are guide mechanisms are provided on both sides of the hole 19. The guide pin 21 is provided at a position and size corresponding to the guide hole 11 of the ferrule 5 described above. In addition, as the alignment member 17, the ferrule (patent document 1) etc. which were used conventionally can also be used as it is.

  As shown in FIG. 5B, the end portion of the hole 19 (on the optical fiber insertion side described later) is formed with a tapered portion 23 whose diameter increases toward the end portion. The diameter of the hole 19 is set slightly larger than the diameter of the inserted optical fiber.

  FIG. 6 is a view showing a state in which the alignment member 17 is attached to the ferrule. As shown in FIG. 6 (a), the guide pin 21 is inserted into the guide hole 11 with the hole 19 side (guide pin 21 side) of the alignment member 17 facing the ferrule 5 (in the direction of arrow G in the figure). At this time, by setting the length of the guide pin 21 to be longer than the protruding length of the optical fiber 9, first, the guide pin 21 is inserted into the guide hole 11 and the position of the alignment member 17 and the ferrule 5 is regulated. be able to. From this state, the tip of the optical fiber 9 can be inserted into the hole 19 by further inserting the alignment member 17 to the ferrule side.

  At this time, it is desirable that the end surface of the ferrule 5 is directed upward and the alignment member 17 is opposed to the ferrule 5 from above. This is to prevent the adhesive 13 from flowing in the direction of the alignment member 17. Alternatively, the adhesive 13 may be applied with the tip of the optical fiber 9 inserted into the hole 19. In this case, the adhesive is prevented from adhering to the alignment member 17. Further, the alignment member 17 itself may be made of a fluororesin or the like so that the adhesive does not adhere.

  As shown in FIG. 6B, when the optical fibers 9 are all inserted into the corresponding holes 19, the positions of the respective optical fibers 9 are regulated by the positions of the holes 19. That is, the holes 19 can be aligned with substantially the same accuracy. In this state, the adhesive 13 is cured to fix the optical fiber 9 to the ferrule 5 (the inner surface of the long hole 7).

  The guide mechanism for positioning the alignment member and the ferrule is not limited to the guide pin and the guide hole. For example, as shown in FIG. 7, a tapered guide portion 21 a may be formed on the side facing the ferrule 5. By doing so, the alignment member 17a can be positioned with respect to the ferrule 5. That is, any guide mechanism may be used as long as the mechanism can perform positioning with respect to the ferrule 5.

  An alignment member 17b as shown in FIG. 8 can also be used. FIG. 8A is a view showing a state in which the alignment member 17b is attached to the ferrule 5, and FIG. 8B is an enlarged view of a portion H in FIG. 8A. A convex step 15 (or protrusion) is formed on a part of the surface facing the ferrule 5 on the alignment member 17b. That is, the gap 27 is formed between the opposing surfaces of the ferrule 5 and the alignment member 17b in a state of being attached to the ferrule 5.

  As shown in FIG. 8B, the adhesive 13 adheres to the end face of the ferrule 5, but by forming the gap 27, it is possible to prevent the adhesive 13 from adhering to the alignment member 17b. Further, since the tapered portion 23 is formed on the end surface of the hole 19, it is possible to reliably prevent the adhesive 13 that is raised on the surface of the optical fiber 9 due to surface tension from adhering to the alignment member 17b. .

  After the adhesive 13 is cured, the alignment member is removed. Thereafter, as shown in FIG. 9, the optical fiber 9 protruding from the ferrule 5 and a part of the end face of the ferrule 5 are polished by the polishing surface 29. As described above, it is possible to obtain the multi-fiber optical connector 1 in which the optical fibers 9 are accurately aligned inside the long hole 7.

  According to the present invention, since a long hole is formed without forming a hole in the ferrule 5, it is not necessary to use a core pin when manufacturing the ferrule. Therefore, the ferrule manufacturability is excellent. Further, since the alignment accuracy of the optical fiber 9 is regulated not by the ferrule but by the alignment member, the ferrule 5 does not require high accuracy. For this reason, it is not necessary to use special resin.

  Further, since the optical fibers are positioned by the alignment member, they can be aligned with extremely high accuracy. Moreover, since the taper part 23 is formed in the edge part of the hole 19 of an alignment member, the insertion property of the optical fiber 9 is good, and it can also prevent that the adhesive agent 13 adheres to an alignment member.

  Further, by providing the step 25 on the end face of the alignment member, a gap 27 can be formed between the end face of the ferrule 5. For this reason, it can prevent that the adhesive agent 13 adheres to an alignment member.

  Next, a second embodiment will be described. FIG. 10 is a diagram illustrating a method of manufacturing a multi-fiber optical connector using the alignment member 30. Note that, in the following embodiments, configurations having the same functions as those shown in FIGS. 1 to 9 are denoted by the same reference numerals as those in FIGS.

  As shown in FIG. 10A, the alignment member 30 is provided with a plurality of grooves 31 corresponding to the number of optical fibers 9. The individual widths of the grooves 31 that are the alignment portions correspond to the diameter of the optical fiber 9. Guide grooves 35 as guide mechanisms are provided on both sides of the plurality of grooves 31. The guide groove 35 corresponds to the guide pin 33 inserted into the guide hole of the ferrule 5a. In this embodiment, an example in which the optical fibers 9 are provided in two stages is shown, but the present invention is not limited to this. Similarly, in the above-described embodiments, the optical fibers 9 may be formed in a plurality of stages.

  First, as shown in FIG. 10A, the alignment member 30 is attached to the ferrule 5a (in the direction of arrow I in the figure). At this time, a tapered portion (not shown) is formed at the upper end portion of the groove 31 (the same tapered portion as the tapered portion 23 in FIG. 5B). In this case as well, as described above, it is desirable to attach the alignment member 30 with the end face of the ferrule 5a facing upward.

  FIG. 10B is a front view showing a state in which the optical fiber 9 is inserted into the groove 31 of the alignment member 30. As shown in FIG. 10B, the optical fibers 9 are aligned in a pitch corresponding to the pitch of the grooves 31 by being inserted into the respective grooves 31. That is, the arrangement direction of the optical fibers 9 in the tape core wire 3 (the direction of arrow J in the figure) is positioned by the groove 31.

  FIG. 11A is a cross-sectional view of the ferrule 5a, and FIG. 11B is an enlarged view of a portion K in FIG. 11A. The ferrule 5a has two long slots 7 formed therein. As shown in FIG. 11 (b), the tip of the elongated hole 7 is reduced in diameter in the height direction. That is, the height of the tip of the long hole 7 is set to be slightly larger than the outer diameter of the optical fiber 9 within a range in which the optical fiber 9 can be inserted. Accordingly, the optical fiber 9 is positioned at the tip of the long hole 7 in the vertical direction (in the direction of arrow L in the figure).

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. In addition, since the alignment member 30 is formed with a plurality of grooves 31, the same alignment member can be used even when aligning a plurality of stages of optical fibers. Moreover, since the ferrule 5a should just use the flat metal mold | die with a thin front, it is not necessary to use a core pin. In addition, since the ferrule 5a only needs to be positioned in the vertical direction, the positioning is easier than in the prior art.

  Next, another embodiment is shown. FIG. 12 is a diagram illustrating a method for aligning the optical fiber 9 using the alignment member 40. As shown in FIG. 12A, the alignment member 40 is a member in which a coating removal portion 41 is formed by removing the tape and the coating in a part of the tape core wire. That is, both side portions of the coating removal portion 41 become the tape integrated portion 43. In addition, what is necessary is just to use the same thing as the tape core 3 of the object to align as a tape core.

  First, as shown in FIG. 12B, the pair of alignment members 40a and 40b are arranged perpendicular to each other. At this time, the covering removal portions 41 are fixed to each other at the orthogonal portions. That is, in the orthogonal portion, the coating removal portions of the alignment members 40a and 40b are orthogonal to each other, and fibers are formed in a lattice shape. In this state, the optical fiber 9 protruding from the ferrule 5 is inserted between the lattice-like fibers.

  FIG. 13 is a diagram illustrating a state in which the optical fiber 9 is inserted into the orthogonal portion of the alignment members 40a and 40b. As described above, the optical fiber 9 has an outer diameter that is approximately ½ of the outer diameter at the time of coating. For this reason, the optical fiber 9 is aligned with a lattice formed by the fibers of the alignment members 40a and 40b. That is, the pitch in the arrangement direction is regulated by the alignment member 40a, and the position in the vertical direction is regulated by the alignment member 40b. Note that it is desirable to apply some tension to the alignment members 40a and 40b.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, in order to quickly cure the adhesive 13 with the optical fiber 9 inserted into the alignment member, a heater, an ultraviolet irradiation mechanism, or the like can be provided on the surface of the alignment member facing the ferrule. That is, an adhesive curing mechanism may be provided on the alignment member side in accordance with the adhesive to be used.

DESCRIPTION OF SYMBOLS 1, 1a ......... Multi-core optical connector 3 ......... Tape core wire 5, 5a ......... Ferrule 7 ......... Elongation hole 9 ......... Optical fiber 9a ......... Tape integrated part 9b ......... Coating removal part 11 ......... Guide hole 13 ......... Adhesive 15 ......... Tapered portion 17, 17b, 30, 40, 40a, 40b ......... Alignment member 19 ......... Hole 21 ......... Guide pin 23 ......... Taper 25 ......... Step 27 ......... Gap 29 ......... Polished surface 31 ......... Groove 33 ......... Guide pin 35 ......... Guide groove 41 ......... Coating removal part 43 ......... Tape integrated part

Claims (7)

A method of manufacturing a multi-fiber optical connector,
Using a ferrule with a long hole into which the tape core can be inserted,
From one end surface of the ferrule, the tape core wire is inserted into the elongated hole, and the coating removal portion from which the tape and coating of the end portion of the tape core wire are removed protrudes from the other end surface of the ferrule,
An alignment member capable of aligning the coating removal portion at a predetermined pitch is used, the relative positions of the ferrule and the alignment member are aligned by a guide mechanism, and the tip of the coating removal portion is aligned with the alignment portion formed on the alignment member. Insert and attach the alignment member to the ferrule;
With the adhesive applied to the gap between the elongated hole and the sheath removing portion, the sheath removing portion is fixed in the elongated hole,
A method of manufacturing a multi-fiber optical connector, wherein after removing the alignment member, the other end face of the ferrule is polished.   When the alignment member and the ferrule are opposed to each other, the relative positions of the alignment member and the ferrule are aligned with each other in a state where a gap is formed between the opposing surfaces of the alignment member and the ferrule. The method of manufacturing a multi-fiber optical connector according to claim 1, wherein the optical fiber connector is fixed. The alignment portion of the alignment member is a plurality of holes arranged at a predetermined pitch into which the tip of the coating removal portion can be inserted corresponding to the outer diameter of the coating removal portion,
3. The method of manufacturing a multi-fiber optical connector according to claim 1, wherein vertical and horizontal positions of each of the covering removal portions are regulated by the alignment portion. The height of the tip of the elongated hole is a height corresponding to the outer diameter of the coating removal portion,
The alignment portion of the alignment member is a plurality of grooves arranged at a predetermined pitch into which the tip of the coating removal portion can be inserted in correspondence with the outer diameter of the coating removal portion.
The positions of the grooves in the arrangement direction of the respective covering removal portions are regulated by the alignment portions,
3. The method of manufacturing a multi-fiber optical connector according to claim 1, wherein a position of each of the covering removal portions in a direction perpendicular to an arrangement direction of the grooves is regulated by the elongated holes. .   5. The multi-fiber optical connector according to claim 1, wherein an end portion of the alignment portion on a side facing the ferrule has a tapered shape that increases in diameter toward the end portion. Manufacturing method. An alignment member used for manufacturing a multi-fiber optical connector,
An alignment portion configured by a plurality of holes or grooves having a predetermined pitch, into which the coating removal portion from which the coating of the optical fiber to be aligned is removed can be inserted
A step in the convex direction is formed on the end surface on the insertion side of the coating removal portion, and when facing the ferrule to which the optical fiber is fixed, a gap can be formed between the end surface of the ferrule,
An alignment member for manufacturing a multi-fiber optical connector, wherein an end portion on the insertion side of the covering removal portion of the alignment portion has a tapered shape whose diameter increases toward the end portion. A multi-fiber optical connector,
A ferrule holding an optical fiber;
An elongated hole provided in the ferrule, in which a tapered portion in which at least a part of the width is reduced is formed;
The tape integrated portion of the tape core wire is inserted to the taper portion of the elongated hole, and from the taper portion to the end surface of the ferrule is provided with a coating removal portion from which the tape and coating of the tape core wire are removed,
A gap is formed over the entire circumference between the outer peripheral surface of the coating removal portion and the inner peripheral surface of the elongated hole, the gap is filled with an adhesive, and the coating removal portion is interposed via the adhesive. The multi-fiber optical connector is fixed to the elongated hole.

Images