JP2010096982A - Optical fiber connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify assembly work of an optical fiber connector. <P>SOLUTION: The optical fiber connector slightly protrudes the edge of a bared primary coated optical fiber from the optical fiber aligning part 10 and enables assembly of the optical fiber connector for connecting a PC by arranging an optical fiber end face processing part 20 provided with a grinding structure for grinding the end face of the edge part of an optical fiber in tapered shape after covering removal in the inside of the guide hole 21 between the optical fiber aligning part 10 and an optical fiber holding part 40, and only by removing a covering of one end to be connected to insert the coated optical fiber 50 with a cleaved edge part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical fiber connector, and more particularly to an optical fiber connector excellent in assembly workability in the field.

  In the optical fiber connector, when the light propagating through the core is emitted from the end face of the optical fiber, it is necessary to suppress reflection by air having a refractive index different from that of the core and to realize good reflection loss characteristics. As a method of suppressing reflection of air at the end face of the optical fiber, a method of suppressing by interposing an index matching agent having the same refractive index as the core between the end faces of the optical fibers to be connected, and between the cores of the optical fiber There is a method of suppressing by directly connecting (Physical Contact: PC).

  Conventionally, in order to connect the cores to each other by PC, it is necessary to polish the end face of the optical fiber fixed to the ferrule with an adhesive. In order to polish the end face of the optical fiber, a dedicated polishing tool and abrasive grains are embedded. It was necessary to prepare a polishing sheet.

On the other hand, the end of the optical fiber is polished by using the pressing force generated when the optical fiber is buckled (bends) inside the connector while holding the tip of the optical fiber protruding from the ferrule. There has been proposed a method for realizing PC connection without doing this (see Non-Patent Document 1). However, the end face of the optical fiber not end-polished, that is, the cleaved surface of the optical fiber cut by a fiber cutter or the like has a ripple in the circumferential portion. It was necessary to carry out separately using a dedicated tool.
Proceedings of the 2008 IEICE General Conference, “Examination of on-site assembly PC connector that does not require fiber end polishing”, B-13-14

  In the optical fiber connector that connects the optical fiber cores to each other as described above, when the optical fiber connector is assembled, the ripple generated in the periphery of the end face of the optical fiber cut by cleavage is separately removed using a dedicated tool. There was a problem that had to be.

  An object of the present invention is to realize an optical fiber connector that can be assembled without requiring a dedicated tool for removing ripples on the cleavage plane of an optical fiber and a ripple removing operation using the tool. .

  In the present invention, in order to achieve such an object, an optical fiber aligning portion that holds the tip of the optical fiber, an optical fiber gripping portion that holds and fixes the coated portion of the optical fiber, and an optical fiber aligning portion And an optical fiber end surface processing unit disposed between the optical fiber gripping unit and the optical fiber aligning unit, the optical fiber end surface processing unit, and the optical fiber gripping unit. A guide hole or guide groove for inserting the optical fiber to the end of the fiber gripping part is provided, and the end face processing part of the optical fiber tapers the end face of the end part of the optical fiber after coating removal inside the guide hole or guide groove. An optical fiber connector having a grinding structure for grinding is proposed.

  Further, in order to achieve such an object, the present invention includes at least an optical fiber aligning portion that holds the tip portion of the optical fiber, and an optical fiber gripping portion that holds and fixes the coated portion of the optical fiber, Each of the optical fiber aligning portion and the optical fiber gripping portion includes a guide hole or a guide groove through which the optical fiber is inserted from the tip of the optical fiber aligning portion to the end of the optical fiber gripping portion. Proposed is an optical fiber connector having a grinding structure for grinding the end face of the tip of the optical fiber after removing the coating inside the hole or guide groove into a tapered shape.

  According to the present invention, the ripple generated on the cleavage surface at the tip of the optical fiber can be removed by the grinding structure only by inserting the optical fiber from the optical fiber gripping part to the optical fiber aligning part. The dedicated tool for removing the ripple on the cleavage plane and the ripple removal work using the tool are not required, and the tip surface of the optical fiber that realizes PC connection can be formed. Simplification can be realized.

  Hereinafter, embodiments of the present invention will be described, but the scope of the present invention is not limited thereby.

<First Embodiment>
FIG. 1 shows a first embodiment of an optical fiber connector of the present invention. In the figure, 10 is an optical fiber aligning section, 20 is an optical fiber end face processing section, 30 is a fiber guide, and 40 is an optical fiber gripper. Reference numeral 50 denotes a coated optical fiber (optical fiber core wire).

  The optical fiber aligning portion 10 holds the tip end portion of the optical fiber core wire 50 and has a guide hole having an inner diameter substantially equal to the outer diameter (usually 125 μm) of the optical fiber (bare optical fiber strand) from which the coating has been removed. 11 is provided at the center thereof, and the rear end thereof is connected and fixed to the optical fiber end face processing unit 20.

  The optical fiber end face processing section 20 communicates with the guide hole 11 of the optical fiber aligning section 10 and has a guide hole 21 having an inner diameter (approximately 200 to 300 μm) slightly larger than the outer diameter (usually 125 μm) of the bare optical fiber. Is connected and fixed to the fiber guide 30 on the opposite side of the connection end with the optical fiber aligning portion 10. Further, the guide hole 21 is provided with a grinding structure that grinds the end surface of the distal end portion of the bare optical fiber to be described later into a tapered shape.

  The fiber guide 30 communicates with the guide hole 21 of the optical fiber end face processing section 20 and includes a guide groove 31 formed of a V groove (or U groove) that accommodates a covered portion of the optical fiber core wire 50 so as to be movable in the axial direction. And a bending space 32 in which the optical fiber 50 can be bent is formed above.

  The optical fiber gripping portion 40 is provided on the opposite side of the end of the fiber guide 30 connected to the optical fiber end surface processing portion 20, and has a function of holding and fixing the coated portion of the optical fiber core wire 50 mechanically or with an adhesive. Have In addition, it cannot be overemphasized that this optical fiber holding | grip part 40 can insert the optical fiber core wire 50 freely at the time of an assembly.

  The fiber guide 30 may be constituted by a single member having a guide hole having an inner diameter substantially the same as the outer diameter of the coated portion of the optical fiber core wire 50 from one end to the other end. It is also possible to form the bending space by expanding the inner diameter of the intermediate part from other parts. Further, the optical fiber aligning unit 10, the optical fiber end surface processing unit 20, the fiber guide 30, and the optical fiber gripping unit 40 may be integrally formed. Furthermore, the positional relationship between the optical fiber end face processing section and the bending space may be reversed.

  In order to assemble the optical fiber connector according to the above-described configuration, first, an optical fiber core wire 50 is prepared in which the coating on one end to be connected is removed and the tip is cleaved.

  Next, one end of the optical fiber core wire 50 described above is accommodated in the guide groove 31 of the fiber guide 30 through the optical fiber gripping portion 40. At this time, the optical fiber gripping portion 40 does not fix the optical fiber core wire 50.

  In this state, when the optical fiber core wire 50 is inserted into the optical fiber end face processing portion 20 side, the tip end portion of the optical fiber core wire 50 extends in the guide hole 21 of the optical fiber end face processing portion 20 along the guide groove 31. Led to. Further, when the optical fiber core wire 50 is pushed into the optical fiber end face processing portion 20 side, the end face of the tip end portion after the coating removal of the optical fiber core wire 50 is ground in a tapered shape by a grinding structure in the guide hole 21 described later. As a result, the end face diameter is reduced.

  One end of the optical fiber core wire 50 whose end face is ground in a tapered shape passes through the guide hole 21 of the optical fiber end face processing section 20 and is guided into the guide hole 11 of the optical fiber alignment section 10. The shaft is aligned to an amount sufficient for connection, and finally, is gripped and fixed by the optical fiber gripping portion 40 in a state where the end surface protrudes from the tip surface of the optical fiber aligning portion 10 by a predetermined amount.

  When assembling the above-described optical fiber connector, in order to obtain a desired fiber pushing force, the optical fiber core wire 50 may be pressed by some member so as not to be bent in the bending space 32.

  2 and 3 show an example of a grinding structure in the end face processing section of the optical fiber, and a plurality of grinding members 22 each having a grindstone 22a at the tip are arranged in the guide hole 21 with a certain interval.

  The distal end portion of the optical fiber core wire after the coating removal, that is, the bare optical fiber strand 51 is inserted into the guide hole 21 with an offset as shown in FIG. By being pushed in as it is, the end surface of the bare optical fiber 51 hits the grindstone 22 a, and the bare optical fiber 51 escapes into an empty space in the guide hole 21. At this time, the front end surface of the bare optical fiber 51 is ground by the grindstone 22a. The grindstone 22a may be a hardened abrasive grain or a grinding mechanism having a sharp concavo-convex structure formed of a hard substance. When the bare optical fiber 51 is further pushed, it strikes the wall surface 21a of the guide hole 21 and is pushed into a narrow space formed by the grinding member 22 and the wall surface 21a.

  Here, the bare optical fiber 51 loses the degree of freedom in the vertical direction in the figure, and therefore takes a bent shape as shown in FIG. 3. This bent shape is a material characteristic and an offset amount of the bare optical fiber 51. It is uniquely determined by the position of the part that restricts the movement of the bare optical fiber 51. Therefore, by appropriately designing the shape of the guide hole 21, the shape of the grinding member 22, and the shape of the grindstone 22a, it is possible to prevent the side surface of the bare optical fiber 51 from hitting the grindstone 22a in the state of FIG. it can. By repeating this structure vertically and horizontally, the corners around the entire end surface of the bare optical fiber 51 can be scraped off.

  If the interval between the repeated structures is sufficiently short with respect to the bending space 32, the buckling load of the optical fiber in the optical fiber end surface processing unit 20 is sufficiently larger than the buckling load of the optical fiber in the bending space 32. Therefore, the optical fiber is not buckled more than necessary in this portion, and the optical fiber is freely buckled only in the bending space 32. For this reason, this structure does not affect the bending of the optical fiber that occurs during connection, which will be described later.

  This point will be described in detail. Since a more severe deflection (a deflection with a short deflection length) generates a larger buckling load, the excess length that is bent is absorbed by a looser deflection, and a deflection portion with a large buckling force is generated. Returns to a straight line.

  If the buckling force of the optical fiber in the optical fiber end surface processing unit 20 is larger than the bending space 32, the optical fiber end surface processing unit 20 tries to have a structure in which the internal pressing force is not applied as much as possible. The fiber shape is uniquely determined accordingly. That is, the shape is as close to a straight line as possible as shown in FIGS. At this time, if the frictional force is ignored, the pressing force generated on the end face of the optical fiber is generated by the bending with the lowest buckling force, and thus is determined by the bending length of the bending space 32. For this reason, the fiber pressing force at the time of connection can be controlled by appropriately controlling the bending length of the bending space 32.

  Conversely, if the buckling force of the optical fiber in the bending space 32 is larger than that of the optical fiber end surface processing unit 20, the optical fiber tends to be as straight as possible in the bending space 32, and the optical fiber end surface processing unit 20 can be as much as possible. Force to push the fiber works. As a result, the optical fiber end face processing unit 20 does not have a shape close to a straight line as shown in FIGS. 6 and 9, and the optical fiber is subjected to a sharp bend or more than designed, or the pressing force on the end face of the optical fiber is reduced. Result.

  In the present embodiment, it is assumed that there is no influence on the function of the bending space 32 that generates a pressing force according to the bending length and the surplus length of the bending space 32 that is bent. The structure has no effect. "

  Further, the grinding member 22 is inserted and used only when the optical fiber connector is assembled, and may be removed after the assembly is completed.

  4 to 6 show other examples of the grinding structure in the end face processing section of the optical fiber. The grinding member 23 having the grindstone 23a at the tip thereof is spaced apart in a guide hole 21 'having a predetermined shape. Are arranged (however, only one is shown in the drawing).

  The tip of the optical fiber core wire after coating removal, that is, the bare optical fiber 51, is inserted into the guide hole 21 'as shown in FIG. The end face of the wire 51 hits the grindstone 23a, and the bare optical fiber 51 escapes into an empty space in the guide hole 21 ′. At this time, the end surface of the bare optical fiber 51 is ground by the grindstone 23a. The grindstone 23a may be a hardened abrasive grain or a grinding mechanism having a sharp concavo-convex structure formed of a hard substance. When the bare optical fiber 51 is further pushed, it hits the wall surface 21a 'of the guide hole 21' and is pushed into a narrow space.

  Here, since the bare optical fiber 51 loses the freedom in the vertical direction in the figure, it takes a bent shape as shown in FIG. 6. This bent shape is a material characteristic of the bare optical fiber 51 and guide holes. It is uniquely determined by the shape of 21 '. Therefore, by appropriately designing the shape of the guide hole 21 ′ and the shape of the grindstone 23 a, it is possible to prevent the side surface of the bare optical fiber 51 from hitting the grindstone 23 a in the state of FIG. 6. By repeating this structure vertically and horizontally, the corners around the entire end surface of the bare optical fiber 51 can be scraped off.

  If the interval between the repeated structures is sufficiently short with respect to the bending space 32, the buckling load of the optical fiber in the optical fiber end surface processing unit 20 is sufficiently larger than the buckling load of the optical fiber in the bending space 32. Therefore, this structure does not affect the bending of the optical fiber that occurs during connection, which will be described later. Further, the grinding member 23 is inserted and used only when the optical fiber connector is assembled, and may be removed after the assembly is completed.

  FIG. 7 to FIG. 9 show still another example of the grinding structure in the optical fiber end face processing section. The grinding member 24 and the dummy member 25 each having a grindstone 24a at the tip thereof are placed in a guide hole 21 ″ having a predetermined shape. A plurality (however, only one of each is shown in the drawing) is arranged at a fixed interval.

  The distal end portion of the optical fiber core wire after coating removal, that is, the bare optical fiber strand 51 is inserted into the guide hole 21 ″ as shown in FIG. 7. By pushing in as it is, the end surface of the bare optical fiber strand 51 becomes 8, the end face of the bare optical fiber strand 51 hits the grindstone 24a, as shown in Fig. 8. At this time, the end face of the bare optical fiber strand 51 is ground by the grindstone 24a. It may be a solidified abrasive grain or a grinding mechanism having a sharp concavo-convex structure formed of a hard substance. When the bare optical fiber 51 is further pushed in, it hits the wall surface 21a "of the guide hole 21" and becomes a narrow space. It is pushed into.

  Here, the bare optical fiber 51 loses the degree of freedom in the vertical direction in the figure, and therefore has a bent shape as shown in FIG. This bent shape is uniquely determined by the material characteristics of the bare optical fiber 51, the shape of the guide hole 21 ", and the shape of the dummy member 25. Therefore, the shape of the guide hole 21" and the shape of the dummy member 25 are appropriately designed. Thus, the buckling force can be made larger than the insertion friction force generated between the bare optical fiber 51 and the guide hole 21 ″. In this case, the bare optical fiber 51 is always in a shape closest to a straight line. 9, it is possible to prevent the side surface of the bare optical fiber 51 from hitting the grindstone 24a in the state of Fig. 9. By repeating this structure vertically and horizontally, the tip of the bare optical fiber strand 51 is obtained. The corners around the entire surface can be scraped off.

  If the interval between the repeated structures is sufficiently short with respect to the bending space 32, the buckling load of the optical fiber in the optical fiber end surface processing unit 20 is sufficiently larger than the buckling load of the optical fiber in the bending space 32. Therefore, this structure does not affect the bending of the optical fiber that occurs during connection, which will be described later.

  If this point is explained in detail, in the structure of FIG. 9, if the buckling force is larger than the frictional force during insertion of the optical fiber, for the same reason as described in the grinding structure of FIGS. The optical fiber does not flex during insertion. Generally, the frictional force of inserting an optical fiber into a ferrule (optical fiber aligning portion) is 10 g weight or less, and the buckling force of the bending space is 30 g weight or more. In this embodiment, in the optical fiber end face processing portion, It is assumed that the buckling force is larger than the buckling force in the bending space. Therefore, if it is a both-ends gripping structure as shown in FIG. 9, the bending more than forced by the dummy member 25 will not generate | occur | produce.

  Further, the grinding member 24 and the dummy member 25 are inserted and used only when the optical fiber connector is assembled, and may be removed after the assembly is completed.

  Although FIG. 2 to FIG. 9 show the grinding structure in the optical fiber end face processing section provided with the guide hole, the same grinding structure can be realized even in the optical fiber end face processing section provided with the guide groove.

  That is, as shown in FIG. 10, a guide groove 26 is provided which is formed of a V-groove or U-groove, and any one of the above-described grinding members 22, 23, 24 or a dummy member 25 is repeatedly arranged at a predetermined interval. By connecting a pair of guide members 27 and 28 and a similar pair of guide members (not shown) while being rotated by 90 ° in the axial direction, the end face of the bare optical fiber can be processed from the top, bottom, left and right. An optical fiber end face processing unit can be configured.

<Second Embodiment>
FIG. 11 shows a second embodiment of the optical fiber connector according to the present invention, in this case, a grinding structure for grinding the end face of the tip of the optical fiber after coating removal inside the guide hole of the optical fiber aligning portion in a tapered shape. In the drawings, the same components as those of the first embodiment are denoted by the same reference numerals. That is, 40 is an optical fiber gripping part, 50 is an optical fiber core, 60 is an optical fiber aligning part, and 70 is a fiber guide.

  The optical fiber aligning portion 60 holds the tip end portion of the optical fiber core wire 50, and at least the tip end side thereof is almost the same as the outer diameter (usually 125 μm) of the optical fiber (bare optical fiber strand) from which the coating has been removed. After that, a guide hole 61 having a slightly larger inner diameter (about 200 to 300 μm) is provided at the center thereof, and the rear end is connected and fixed to the fiber guide 70. Further, the guide hole 61 is provided with a grinding structure for grinding the end face of the distal end portion of the bare optical fiber in a tapered shape.

  FIG. 12 shows the details of the optical fiber aligning portion 60 in FIG. 11, and any one of the grinding members 22, 23, 24 similar to those explained in FIGS. The dummy members 25 are repeatedly arranged in the vertical and horizontal directions with a certain interval (however, only the vertical direction is shown in the drawing). When any one of the grinding members 23 and 24 or the dummy member 25 is used, the guide hole 61 is assumed to have the same shape as that described with reference to FIGS. At this time, the grinding member or the dummy member may be screwed and fixed to the optical fiber aligning portion 60, and alignment can be performed by these members.

  The fiber guide 70 communicates with the guide hole 61 of the optical fiber aligning portion 60 and includes a guide groove 71 formed of a V groove (or U groove) that accommodates the covered portion of the optical fiber core wire 50 so as to be movable in the axial direction. Provided above, and a bending space 72 in which the optical fiber 50 can be bent is formed. Further, the optical fiber gripping part 40 is provided on the opposite side of the connection end of the fiber guide 70 with the optical fiber aligning part 60.

  The fiber guide 70 may be constituted by a single member having a guide hole having an inner diameter substantially the same as the outer diameter of the coated portion of the optical fiber core wire 50 from one end to the other end. It is also possible to form the bending space by expanding the inner diameter of the intermediate part from other parts. Further, the optical fiber aligning portion 60, the fiber guide 70, and the optical fiber gripping portion 40 may be integrally formed.

  In order to assemble the optical fiber connector according to the above-described configuration, first, an optical fiber core wire 50 is prepared in which the coating on one end to be connected is removed and the tip is cleaved.

  Next, one end of the optical fiber core wire 50 described above is accommodated in the guide groove 71 of the fiber guide 70 through the optical fiber gripping portion 40. At this time, the optical fiber gripping portion 40 does not fix the optical fiber core wire 50.

  In this state, when the optical fiber core wire 50 is inserted into the optical fiber aligning portion 60 side, the distal end portion of the optical fiber core wire 50 extends in the guide hole 61 of the optical fiber aligning portion 60 along the guide groove 71. Led to. Further, when the optical fiber core wire 50 is pushed into the optical fiber aligning portion 60 side, the end surface of the distal end portion after the coating removal of the optical fiber core wire 50 is ground in a tapered shape by the above-described grinding structure in the guide hole 61. As a result, the end face diameter is reduced.

  One end of the optical fiber core wire 50 whose end face is ground to a taper shape is aligned to a sufficient axial deviation at the front end side of the guide hole 61 of the optical fiber aligning portion 60, and finally, The optical fiber gripping section 40 grips and fixes the end face with a predetermined amount protruding from the tip face of the optical fiber aligning section 60.

  When assembling the above-described optical fiber connector, in order to obtain a desired fiber pushing force, the optical fiber core wire 50 may be pressed by some member so as not to be bent in the bending space 72.

  According to this embodiment, since the optical fiber aligning portion also serves as the optical fiber end face processing portion, there can be an advantage in miniaturization and cost reduction.

  According to the optical fiber connector according to the first or second embodiment described above, the ripple generated on the cleaved surface at the tip of the optical fiber simply by inserting the optical fiber from the optical fiber gripping part to the optical fiber aligning part. Can be removed by a grinding structure, and the end face of the optical fiber can be protruded from the tip face of the optical fiber aligning portion by a predetermined amount, so that this optical fiber connector and other similar optical fiber connectors When the end faces of both optical fiber aligning parts are in close contact with each other, the bare optical fiber strand protruding from the end face of the optical fiber aligning part is pushed into the optical fiber connector. Since the core wire itself is fixed to the fiber guide by the optical fiber gripping portion, the core wire is bent in the bending space. The end face of the bare optical fiber is pressed against the end face of the bare optical fiber of the opposite optical fiber connector by the restoring force to return the bending, and can be connected to the PC.

  FIG. 13 shows the measurement results of the end face diameter of the optical fiber after the taper processing and the load (pressing force) necessary for connecting the cores to each other by PC. Here, when the pressing force due to the restoring force described above is about 1.5 [N] at the maximum, it can be seen from FIG. 13 that the end face diameter that enables PC connection is about 80 μm or less. Accordingly, since the diameter of the outer peripheral portion of the clad of the optical fiber (the outer diameter of the bare optical fiber) is usually 125 μm, PC connection is possible if the end surface is cut at least about 20 μm from the periphery by the above-described grinding structure. I know that there is.

The perspective view which shows 1st Embodiment of the optical fiber connector of this invention Cross-sectional view of the main part showing an example of a grinding structure Cross-sectional view of the main part showing an example of a grinding structure Cross-sectional view of the main part showing another example of a grinding structure Cross-sectional view of the main part showing another example of a grinding structure Cross-sectional view of the main part showing another example of a grinding structure Cross-sectional view of relevant parts showing still another example of a grinding structure Cross-sectional view of relevant parts showing still another example of a grinding structure Cross-sectional view of relevant parts showing still another example of a grinding structure Exploded perspective view showing an example of an optical fiber end face processing section provided with a guide groove The perspective view which shows 2nd Embodiment of the optical fiber connector of this invention The disassembled perspective view which shows the detail of the optical fiber aligning part in FIG. Graph showing the measurement results of the end face diameter of a tapered optical fiber and the load required to connect the cores to each other by PC connection

Explanation of symbols

  10, 60: optical fiber aligning portion, 11, 61: guide hole, 20: optical fiber end face processing portion, 21, 21 ′, 21 ″: guide hole, 22, 23, 24: grinding member, 25: dummy member, 26: Guide groove, 27, 28: Guide member, 30, 70: Fiber guide, 31, 71: Guide groove, 32, 72: Deflection space, 40: Optical fiber gripping part, 50: Optical fiber core wire, 51: Bare Optical fiber strand.

Claims (7)

An optical fiber aligning portion that holds the tip of the optical fiber, an optical fiber gripping portion that holds and fixes the coated portion of the optical fiber, and light disposed between the optical fiber aligning portion and the optical fiber gripping portion. And at least a fiber end face processing unit,
Each of the optical fiber aligning portion, the optical fiber end face processing portion, and the optical fiber gripping portion includes a guide hole or a guide groove for inserting the optical fiber from the tip of the optical fiber aligning portion to the end of the optical fiber gripping portion,
An optical fiber connector characterized in that the optical fiber end face processing section is provided with a grinding structure for grinding the end face of the tip end portion of the optical fiber after coating removal inside the guide hole or guide groove. At least an optical fiber aligning portion that holds and aligns the tip of the optical fiber, and an optical fiber gripping portion that holds and fixes the coated portion of the optical fiber,
Each of the optical fiber aligning portion and the optical fiber gripping portion includes a guide hole or a guide groove through which the optical fiber is inserted from the tip of the optical fiber aligning portion to the end of the optical fiber gripping portion.
An optical fiber connector characterized in that the optical fiber aligning portion has a grinding structure for grinding the end face of the distal end portion of the optical fiber after removing the coating inside the guide hole or guide groove. The optical fiber connector according to claim 1 or 2,
The said grinding structure is comprised by the 2 or more grinding member repeatedly arrange | positioned at intervals in the said guide hole or guide groove. The optical fiber connector characterized by the above-mentioned. The optical fiber connector according to claim 3,
The optical fiber connector is characterized in that the guide hole or the guide groove guides the optical fiber so that the peripheral portion of the tip of the optical fiber after the coating removal comes into contact with the grinding surface of the grinding member. The optical fiber connector according to claim 3,
The optical fiber connector, wherein the guide hole or the guide groove guides the optical fiber so that a side surface of the optical fiber after removal of the coating does not hit a ground surface of the grinding member. In the optical fiber connector according to any one of claims 1 to 5,
An optical fiber connector characterized in that, of the end face of the tip end portion of the optical fiber after removal of the coating, the range to be tapered by the grinding structure is at least 20 μm from the outer periphery of the clad. The optical fiber connector according to any one of claims 1 to 6,
Provided with a bending space where the optical fiber bends between the optical fiber aligning portion and the optical fiber gripping portion,
An optical fiber connector characterized in that the optical fiber is fixed to the optical fiber gripping portion with a tip protruding from the tip of the optical fiber aligning portion by a predetermined amount.

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