JP2011070101A - Optical fiber fixture and optical connector - Google Patents

Abstract

An optical fiber fixture for obtaining an optical connector for assembling a connection site excellent in reliability and capable of performing stable connection in which an optical fiber is hardly broken and an optical connector using the same.
An optical fiber fixture according to the present invention is disposed on an extension line of a central axis A of a fine hole 2a and a ferrule 2 having a fine hole 2a holding the optical fiber 1, and a rear end 1a of the optical fiber 1. And a flange 4 having an inner hole 4a for holding the ferrule 2 and the alignment member 3 at a distance from each other. The inner hole 4a is formed from the hole 2a and the through hole 3a. The rear end portion 1a of the optical fiber 1 is movably inserted in the direction of the axis A in the through hole 3a.
[Selection] Figure 1

Description

  The present invention relates to an optical fiber fixture used for optical communication and an optical connector using the same.

  In recent years, with the widespread use of optical fiber networks, there is a demand for an optical connector that is attached to the tip of an optical fiber cable (optical cable) such as an optical drop cable or an optical indoor cable. When an optical connector is assembled and used for these optical cables in the field, the outer sheath of the optical cable tip is removed to expose the optical fiber core, and the optical connector is assembled to the tip of the optical fiber core.

  The work of assembling a conventional optical connector at the tip of an optical fiber is performed by, for example, inserting an optical fiber (such as an optical fiber cord) in advance into all connector housing parts such as rubber boots and removing the resin coating at the tip of the optical fiber cord. In this process, the exposed bare optical fiber was inserted into the ferrule, and then the tip of the ferrule was polished and assembled to complete the optical connector. Since there are other polishing processes that require precision, work at the connection site may be difficult.

  Therefore, there is a demand for an on-site assembly optical connector that can be easily assembled at a connection site outside the factory. By inserting and fixing an optical fiber to a ferrule whose tip surface has been polished in advance, the ferrule polishing work after connection is omitted. An optical connector of the type has been proposed (see, for example, Patent Document 1).

  On the other hand, an optical connector shown in FIG. 5 has been proposed as an optical connector capable of improving reliability with a simple configuration. As shown in FIG. 5A, the optical connector 30 has a ferrule 21 containing an optical fiber 22, a ferrule 21 attached, a flange 23 having an inner hole 23a, and a second optical fiber core 24 fixed thereto. The optical fiber fixing member 25 and a connecting body 26 that connects the flange 23 and the optical fiber fixing member 25 are provided. In the optical connector 30, the second optical fiber core wire 24 is bent in the internal space of the coupling body 26 between the flange 23 and the optical fiber fixing member 25, and the rear end portion 22 b of the optical fiber 22 and the second optical fiber core wire are bent. The second optical fiber 24a at the distal end from which the coating 24 is removed is brought into contact with the inside of the pore 21a.

  In this conventional optical connector 30, since the second optical fiber core 24 is fixed in a bent state, the second optical fiber core 24 is subjected to a second force by a force to return to the original shape (straight line). The second optical fiber 24a at the distal end of the optical fiber core 24 is pressed against the rear end 22b of the optical fiber 22 in the pore 21a of the ferrule 21, thereby connecting the optical fiber 22 and the second optical fiber 24a. They are connected in contact (see, for example, Patent Document 2).

JP-A-10-206688 JP 2006-3648 A

  However, in the conventional optical connector 30, as shown in FIG. 5B, the second optical fiber core wire 24 is bent and bent at the covered core wire portion, and is inserted into the pore 21 a of the ferrule 21. The coating of the second optical fiber 24a is removed. For this reason, bending stress concentrates at the boundary 24b between the coated second optical fiber core 24 and the removed second optical fiber 24a, and the second optical fiber 24 breaks during long-term use. As a result, there was a problem that communication was interrupted.

  Moreover, although the 2nd optical fiber core wire 24 is fixed with the optical fiber holding member 25, it is difficult to optimize the pushing amount of the 2nd optical fiber core wire 24, and dispersion | variation arises in the bending amount of the 2nd optical fiber core wire 24, A stable splice loss value could not be obtained.

  The present invention has been made in view of the above circumstances, and provides a highly reliable optical fiber fixture capable of obtaining a stable connection in which an optical fiber is not easily broken, and an optical connector for assembling a connection site using the same. There is to do.

  In view of the above problems, an optical fiber fixture according to an embodiment of the present invention is provided on a ferrule having a pore holding an optical fiber and an extension of the central axis of the pore, and the end of the optical fiber. An alignment member having a through hole into which the portion is inserted, and a flange having an inner hole for holding the ferrule and the alignment member with a space therebetween, the inner hole having an inner diameter larger than that of the fine hole and the through hole And an end portion of the optical fiber is inserted in the through hole so as to be movable in the axial direction.

  In the optical fiber fixture, it is preferable that the optical fiber is fixed in the pores with a first adhesive, and is fixed with a second adhesive at an opening of the pores.

  Moreover, it is preferable that the first adhesive is an epoxy adhesive and the second adhesive is a silicone adhesive.

  An optical connector according to an embodiment of the present invention includes any one of the optical fiber fixtures described above, a second optical fiber core wire whose tip coating has been removed, and the second optical fiber core wire with respect to the optical fiber fixture. An optical fiber fixing member that regulates the position, and a sheath removal portion of the second optical fiber core wire is inserted from an opening on the opposite side of the through hole into which the optical fiber is inserted, and the alignment member passes therethrough. The rear end of the optical fiber and the front end of the second optical fiber are brought into contact with each other in the hole, and the optical fiber is bent in the inner hole.

  An optical fiber fixture according to the present invention includes a ferrule having a pore holding an optical fiber, and an alignment member having a through hole that is disposed on an extension line of the central axis of the pore and into which an end of the optical fiber is inserted. And a flange having an inner hole for holding the ferrule and the alignment member with a space therebetween, the inner hole having an inner diameter larger than that of the fine hole and the through hole, and an end of the optical fiber is By being inserted movably in the axial direction in the through-hole, even if the end of the optical fiber moves in the through-hole and bends the optical fiber, it is difficult for stress to concentrate on a part of the optical fiber. It is possible to obtain an optical connector with excellent reliability in which the fiber is not easily cut.

It is sectional drawing which shows the optical fiber fixing tool which concerns on one Embodiment of this invention. (A) And (b) is sectional drawing which shows the optical fiber fixing tool which concerns on other embodiment of this invention. It is an assembly sectional view explaining the assembly method of the optical fiber fixture concerning one embodiment of the present invention. (A) is sectional drawing which shows the optical connector using the optical fiber fixing tool of this invention, (b), (c) is principal part sectional drawing of (a). (A) is sectional drawing which shows the example of the conventional optical connector, (b) is principal part sectional drawing of (a).

  Embodiments of the optical fiber fixture and the optical connector according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a sectional view showing an optical fiber fixture X according to an embodiment of the present invention. In the optical fiber fixture X, a ferrule 2 having a pore 2a that holds the optical fiber 1 and a cylindrical alignment member 3 are arranged on a straight line with a gap therebetween. The straight line is a common axis A of the ferrule 2 and the alignment member 3. The alignment member 3 has a through hole 3a whose axis coincides with the axis A, and the rear end portion 1a of the optical fiber 1 is inserted and positioned in the through hole 3a. Further, the ferrule 2 and the alignment member 3 are inserted and held in the inner hole 4 a of the cylindrical flange 4. The inner hole 4 a has a larger inner diameter than the fine hole 2 a of the ferrule 2 and the through hole 3 a of the alignment member 3. Further, the rear end portion 1a of the optical fiber 1 is merely inserted movably in a direction parallel to the axis A in the through hole 3a, and is not fixed in the through hole 3a.

  As the optical fiber 1, various optical fibers made of transparent glass, resin, or the like from which the surface coating has been removed are used. Alternatively, a so-called optical fiber strand in which a thin silicone coating or the like is applied to the glass or resin surface is used. Since the optical fiber 1 is a uniform line having the same thickness from one end to the rear end 1a, bending stress does not concentrate in one place even if it is bent.

  Here, the ferrule 2 has a cylindrical shape and includes a pore 2a, a rear end surface 2b, and a front end surface 2c. In the optical fiber fixture X, the optical fiber 1 is arranged such that one end thereof is exposed to the front end surface 2c side of the ferrule 2 and the rear end 1a protrudes outside the rear end surface 2b of the ferrule 2. The ferrule 2 is fixed in the pores 2a with the first adhesive 5, and is fixed with the second adhesive 6 at the rear end side 2b opening of the pores 2a.

  Note that one end of the optical fiber 1 is exposed so that the end surface 2c of the ferrule 2 and the one end surface of the optical fiber 1 are substantially on the same plane. One end surface of the optical fiber 1 may be disposed so as to slightly protrude or be slightly retracted from the distal end surface 2 b of the ferrule 2.

  It is preferable that the rear end side 2b opening of the pore 2a is chamfered so as to gradually expand toward the opening surface. Between the rear end side 2b opening and the optical fiber 1, It is preferable that the second adhesive 6 is flexible and has a small rigidity. Thereby, even if a bending force is applied to the optical fiber 1, the optical fiber 1 is hardly damaged.

  In the optical fiber fixture X, the end coating removal portion 7a of the second optical fiber 7 for connection is penetrated from the opening opposite to the through hole 3a into which the optical fiber 1 is inserted toward the rear end portion 1a of the optical fiber 1. If inserted into the hole 3a, the optical fiber 1 and the second optical fiber 7 are abutted inside the through hole 3a, and the optical fiber 1 and the tip 7c of the second optical fiber 7 can be optically connected. . Since the optical fiber 1 and the second optical fiber 7 can be optically connected by butting, the connection can be made with a sufficient connection loss without applying a refractive index matching agent to the end face of the optical fiber.

  Further, if the second optical fiber 7 is inserted to a certain extent while being pressed against the rear end 1a of the optical fiber 1, the optical fiber 1 is movable with respect to the axial direction A of the through hole 3a into which the optical fiber 1 is inserted. Is inserted into the through hole 3a, and the extruded portion bends in the inner hole 4a and generates a reaction force to return to the linear shape, so that the rear end portion 1a of the optical fiber 1 is second. It is pressed against the tip 7c of the optical fiber 7.

This stabilizes the optical connection between the optical fiber 1 and the second optical fiber 7,
When the coating at the tip of the second optical fiber 7 is removed, the pushing amount of the rear end 1a of the optical fiber 1 can be optimized by making the axial dimension of the coating removal portion 7a appropriate. . Therefore, the amount of bending of the optical fiber 1 can be made constant, and the connection loss can be stabilized.

  Here, if the chamfered portion 3b is provided at the opening edge of the through hole 3a of the alignment member 3, it contributes as a guide port for the second connecting optical fiber 7 inserted into the through hole 3a. This is preferable from the viewpoint of easy insertion of 7.

  Further, the chamfered portion 3b can be formed by, for example, rounding a corner portion by brushing or barrel processing at a joint portion with the through hole 3a after processing with a conical processing grindstone.

  Furthermore, it is preferable that the end surface of the rear end portion 1a of the optical fiber 1 is formed into a spherical surface. Thus, if the end surface of the rear end portion 1a of the optical fiber 1 is a spherical surface, the interposition of the air layer between the end surfaces of the optical fiber can be reduced, and the connection loss can be reduced.

  Further, the optical fiber 1 can use various fibers such as a single mode optical fiber, a multimode optical fiber, a polarization dependent fiber, a dispersion shifted fiber, and a non-zero dispersion shifted fiber, and the material is not limited to the silica glass optical fiber. Plastic optical fibers such as all plastic optical fibers (POF) and plastic clad optical fibers (PCF) can also be used.

The material of the ferrule 2 can be a metal such as a copper alloy, a nickel alloy, or stainless steel, a plastic such as an epoxy resin or a liquid crystal polymer, a glass such as crystallized glass, or a ceramic. In such a material, the ferrule 2 is preferably formed of zirconia ceramics. Specifically, partial stabilization mainly comprising tetragonal crystals, containing ZrO ₂ as a main component, at least one of Y ₂ O ₃ , CaO, MgO, CeO ₂ , Dy ₂ O _{3 and the} like as a stabilizer. It is preferable to use zirconia ceramics. This is because such partially stabilized zirconia ceramics have excellent wear resistance and an appropriate elastic deformation function.

  Similarly to the ferrule, the alignment member 3 may be made of metal such as copper alloy, nickel alloy, or stainless steel, plastic such as epoxy resin, liquid crystal polymer, glass such as crystallized glass, ceramics, or the like. it can. In such a material, the alignment member 3 is preferably formed of zirconia ceramics as with the ferrule 2.

  The flange 4 opens to one end surface side, communicates with the first hole portion 4b for inserting the rear end portion 2b of the ferrule 2 and the first hole portion 4b, and opens to the other end surface of the flange 4 so as to align the member. And a second hole portion 4c into which 3 is inserted. The inner hole 4a that relays between the first hole 4b and the second hole 4c preferably has a diameter that does not contact the inner wall of the inner hole 4a even when the optical fiber 1 is bent. Here, the inner hole 4a has a larger inner diameter than the pores 2a and the through holes 3a. The flange 4 can be obtained, for example, by lathing a stainless steel or a copper alloy to adjust the shape, and in the case of a copper alloy, it is then plated with nickel and finished.

  The first adhesive 5 is desirably an epoxy-based two-component adhesive, but is not limited thereto, and is an acrylic resin anaerobic adhesive (for example, an adhesive mainly composed of diacrylate and peroxide). It is also possible to use cyanoacrylate-based instant adhesives (for example, those containing 2-cyanoacrylate monomer as a main component). The second adhesive 6 is desirably a softer adhesive than the first adhesive 5 after curing, such as a silicone-based adhesive. It should be noted that any material may be used as long as it is flexible and can flexibly follow and protect against bending of the optical fiber 1.

  Next, an optical fiber fixture Y according to another embodiment of the present invention will be described with reference to FIG. FIG. 2A is a cross-sectional view showing an optical fiber fixture Y according to another embodiment of the present invention. In FIG. 2, the same reference numerals are given to the portions corresponding to the respective components in FIG.

  As shown in FIGS. 2 (a) and 2 (b), the optical fiber fixture Y includes a ferrule 2, an alignment member 3 disposed at a distance from the ferrule 2 and having a through hole 3a, and a ferrule. 2 is a cylindrical flange 4 that holds the rear end portion 2b and the alignment member 3, and an optical fiber 1 that is fixed to the pore 2a of the ferrule 2 and the rear end portion 1a is inserted into the through hole 3a of the alignment member 3. And.

  In the optical fiber fixture Y shown in FIG. 2A, the inner diameter of the second hole portion 4c is smaller than the inner diameter of the inner hole 4a of the flange 4 as compared to the optical fiber fixture X of FIG. In this case, since the outer diameter of the alignment member 3 can be reduced, it can contribute to cost reduction. Similarly, the inner diameter of the first hole 4b may be made smaller than the inner diameter of the inner hole 4a, and the outer diameter of the ferrule 2 may be made smaller.

  Further, in the optical fiber fixture Y shown in FIG. 2B, the inner diameter of the second hole 4c of the flange 4 is the same as the inner diameter of the inner hole 4a. The inner diameter machining of the second hole 4c can be reduced by one step, which can also contribute to cost reduction. Similarly, the inner diameter of the first hole 4b may be the same as the inner diameter of the inner hole 4a.

  If the inner diameters of the first hole 4b and the second hole 4c are larger than the inner diameter of the inner hole 4a as in the optical fiber fixture X of FIG. 1, the inner hole 4a and the first hole 4b or the first hole 4b There is an advantage that a step is provided between the two holes 4c and the insertion position of the ferrule 2 or the alignment member 3 can be easily managed.

  Next, an assembling method of the optical fiber fixture X according to one embodiment of the present invention will be described with reference to an assembly cross-sectional view shown in FIG.

  First, the ferrule 2 is made of ceramics or the like. Next, the 1st adhesive agent 5 (for example, epoxy adhesive) is apply | coated to the outer peripheral surface of the part inserted in the pore 2a of the optical fiber 1. FIG. At this time, an adhesive is not applied to the outer peripheral surface and the end surface of the rear end portion 1a of the optical fiber 1.

  Next, the optical fiber 1 is inserted from the rear end face 2 b side of the ferrule 2 to cure the first adhesive 5. At this time, the rear end 1 a side of the optical fiber 1 is in a state of protruding from the rear end 2 b of the ferrule 2. After the curing of the adhesive is completed, the tip surface 2c of the ferrule 2 is polished together with the tip portion of the optical fiber 1 to finish the end surface into a mirror surface. Next, the second adhesive 6 is applied to the base of the optical fiber 1 protruding from the rear end portion 2b of the ferrule 2 so as to have a smooth meniscus shape from the rear end portion 2b of the ferrule 2 and cured.

  Next, the rear end 2 b side of the ferrule 2 is inserted into the first hole 4 b of the flange 4. For fixing the ferrule 2 to the flange 4, press fitting or the like can be used, but it is desirable to use an adhesive. Finally, the alignment member 3 is inserted into the inner hole 4a of the flange 4 and fixed. The alignment member 3 can be fixed by press-fitting or the like, but it is preferable to use an adhesive. Here, it is desirable to insert the alignment member 3 while confirming that the rear end portion 1a of the optical fiber 1 is inserted from the tapered portion 3b of the through hole 3a.

  Next, the optical connector Z using the optical fiber fixture X will be described with reference to FIGS. 4 (a) and 4 (b). FIG. 4 shows a cross section of an optical connector Z according to an embodiment of the present invention, where (a) is a cross sectional view of the optical connector Z, (b) is an enlarged cross sectional view of the rear end portion of the ferrule 2 in the optical connector Z, (C) is a partial enlarged cross-sectional view showing a cross section of the alignment member 3 in the optical connector Z and showing a connection state between the optical fiber 1 and the second optical fiber 7 in the through hole 3a.

  The optical connector Z uses an optical fiber fixture X in which the rear end portion 2b of the ferrule 2 is fixed by a flange 4, the alignment member 3 is fixed to the rear end side of the flange 4, and the optical fiber 1 is disposed inside. . And the 2nd optical fiber 7 which removed the coating | coated of the front-end | tip, the optical fiber fixing member 8 which fixes the 2nd optical fiber 7, and this optical fiber fixing member 8 are attached, and the optical fiber fixing tool X and the elastic body 10 are attached. And a front housing 11 that holds the connection body 9 and the optical fiber fixing member X and serves as an exterior portion.

  The coating removal portion 7 a of the second optical fiber 7 is inserted from the rear end side opening of the through hole 3 a, and the rear end portion 1 a of the optical fiber 1 and the front end portion 7 c of the second optical fiber 7 in the through hole 3 a of the alignment member 3. Are in contact with each other and optically connected. Further, the coating removal portion 7a of the second optical fiber 7 is pushed into the through hole 3a, so that the optical fiber 1 pushed into the inner hole 4a is bent in the inner hole 4a. The through-hole 3 a has an inner diameter that is large enough to allow the coating removal portion 7 a of the optical fiber 1 and the second optical fiber 7 to be inserted, and is slightly larger than the outer diameter of the optical fiber 1 and the second optical fiber 7. It has an inner diameter. The coating removal part 7a of the optical fiber 1 and the second optical fiber 7 is not fixed in the through hole 3a and is in a state of being movable in the axial direction. In addition, the sheath removing portion 7a is processed to a length in which the tip 7c becomes a predetermined position in the through hole 3a in a state where the sheath portion 7b is abutted against the opening of the through hole 3a.

  Here, the end surface 2c of the ferrule 2 of the optical connector Z is spherically polished to a curvature radius of 5 to 30 μm. Further, when connecting to the counterpart optical connector, a pressing force from the elastic body 7 is applied. As a result, the gap between the front end surfaces 2 of the ferrule 2 is made as small as possible to bring the optical fibers into contact with each other, thereby reducing the light connection loss.

  4C, the rear end portion 1a of the optical fiber 1 and the front end portion 7c of the second optical fiber 7 are aligned in a straight line inside the through hole 3a of the alignment member 3. The covering portion 7b and the covering removing portion 7a of the second optical fiber 7 are arranged in a straight line along the axis A, and a bent portion is generated on the boundary surface 7d, so that stress is not concentrated. For this reason, there is less risk of the second optical fiber 7 being broken during long-term use.

  Further, in the optical connector Z, when the second optical fiber 7 is inserted into the through hole 3a of the alignment member 3, the rear end portion 1a of the optical fiber 1 moves toward the ferrule 1 along the axis A direction. At that time, the optical fiber 1 bends and curves in the inner hole 4a. Since the optical fiber 1 tries to return to the original shape (linear shape) from the bent state, the rear end 1a is pressed against the front end surface 7c of the second optical fiber 7, and the second optical fiber 7 Since it is fixed at a predetermined position from the alignment member 3 by the fiber fixing member 8, the position of the distal end surface 7c of the second optical fiber 7 is regulated and does not move. Therefore, the optical connection between the rear end portion 1a and the front end surface 7c is stabilized.

  Further, as shown in FIG. 4B, the portion where the optical fiber 1 protrudes from the rear end portion 2b of the ferrule 2 is protected because the second flexible adhesive 6 protects the optical fiber 1. Even if it exists, the optical fiber 1 is hard to break.

  The optical fiber fixing member 8 and the connection body 9 can be formed of a stainless steel or copper alloy with a nickel plating finish, or a resin such as boribylene terephthalate resin (PBT), fluorine resin, or liquid crystal polymer. If it is a metal, it can be manufactured by lathe processing or the like, and if it is a resin, it can be formed by injection molding or the like. A front housing 11 is attached to the front end portion of the connecting body 9 so as to surround the ferrule 2, the flange 4 and the elastic body 10. In the front housing 11, an elastic body 10 made of, for example, a compression coil spring is disposed between the flange 4 and the connecting body 9.

  As described above, according to the optical fiber fixtures X and Y according to the embodiments of the present invention, the optical fiber 1 to be bent is pre-assembled with high accuracy in a clean factory where dust is not generated. It becomes possible. And if the front-end | tip process of the 2nd optical fiber 7 is performed on-site and it inserts in the through-hole 3a of the alignment member 3 from the rear part of the optical fiber fixing member 8, the optical connector Z can be assembled easily.

  Moreover, the coating removal part 7a should just be the length inserted in the through-hole 3a, and may be comparatively short. The push amount of the second optical fiber 7 can be optimized only by managing the length of the coating removal portion 7a at the site, so that the optical fiber 1 is assembled without variation so that the bending amount of the optical fiber 1 becomes constant, A stable splice loss value can be obtained.

  Furthermore, since the second optical fiber core wire 7 is arranged in the through hole 3a of the alignment member 3 in the axial direction in a straight state, stress is concentrated at the boundary portion between the coating removal portion 7a and the coating portion 7b. The optical connector Z is excellent in reliability with little breakage even when used for a long time.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the ferrule 2, the alignment member 3, and the flange 4 are separate members. For example, the ferrule 2 and the flange 4 are integrated, or the alignment member 3 and the flange 4 are integrated. The structure may be different.

X, Y: Optical fiber fixture Z: Optical connector 1: Optical fiber 1a: Rear end portion 2: Ferrule 2a: Fine hole 2b: Rear end surface 2c: Front end surface 3: Alignment member 3a: Through hole 3b: Chamfered portion 4 : Flange 4a: Inner hole 4b: 1st hole 4c: 2nd hole 5: 1st adhesive agent 6: 2nd adhesive agent 7: 2nd optical fiber 7a: Cover removal part 7b: Cover part 7c: Tip part 8 : Optical fiber fixing member 9: Linked body 10: Elastic body 11: Front housing A: Shaft

Claims (4)

A ferrule having a pore holding an optical fiber, an alignment member disposed on an extension line of a central axis of the pore, and having a through-hole into which an end of the optical fiber is inserted, the ferrule and the alignment member A flange having an inner hole to hold at an interval, the inner hole has an inner diameter larger than that of the fine hole and the through hole, and the end of the optical fiber is movable in the axial direction within the through hole. An optical fiber fixture inserted into the optical fiber. The optical fiber fixture according to claim 1, wherein the optical fiber is fixed in the pores with a first adhesive, and is fixed with a second adhesive at an opening of the pores. The optical fiber fixture according to claim 2, wherein the first adhesive is an epoxy adhesive, and the second adhesive is a silicone adhesive. An optical fiber fixture according to any one of claims 1 to 3,
A second optical fiber core with the tip coating removed;
An optical fiber fixing member that regulates a position of the second optical fiber core wire with respect to the optical fiber fixture;
The portion of the second optical fiber core wire whose sheath is removed is inserted from an opening of the through hole opposite to the opening into which the optical fiber is inserted, and the rear end of the optical fiber and the first end are inserted into the through hole of the alignment member. 2. An optical connector characterized in that the tip of two optical fibers is brought into contact with the optical fiber and the optical fiber is bent in the inner hole.

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