JP2010286793A - Optical fiber connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical fiber connector that aligns optical fibers mutually with high precision without removing a coating, and allows easy connection between the optical fibers and extraction of a desired optical fiber when optical fiber connectors are installed densely. <P>SOLUTION: The optical fiber connector includes a plug and an adapter having an optical fiber-aligning part to align optical fibers face to face. The plug includes an optical fiber-gripping part, which includes a groove part, a lid part, and a clamper to press the lid part to the groove part and to grip an optical fiber. Each of the groove part and the lid part includes a fixed blade, which contacts with a glass part of the optical fiber through its coating, coaxially with the optical fiber. The clamper is constructed of a gripping part pressing the lid part to the groove part, and an extension part releasing fitting between a locking piece of the adapter and a locking hole of the plug. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical fiber connecting component that connects optical fibers by aligning optical fibers facing each other, and in particular, an optical fiber connecting component that can connect an optical fiber core without removing the coating of the optical fiber core. About.

  Optical fiber fusion splicing, mechanical splices, and optical connectors are used as optical fiber connectors for connecting optical fibers. In common with these optical fiber connections, the coating of the optical fiber core is applied to the optical fiber in the state of the optical fiber having a coating outer diameter of 250 μm to 500 μm by coating glass having a diameter of 125 μm with a resin. A step of removing the optical fiber into a glass state having a diameter of 125 μm is necessary.

  There is a mechanical splice as an optical fiber connector capable of optical fiber connection by a simple operation (see Patent Document 1 and Patent Document 2). The mechanical splice includes a V-groove substrate, a lid member, and a clamper that integrates the V-groove substrate and the lid member. In the mechanical splice, an optical fiber alignment portion is formed by overlapping a V-groove substrate and a lid member. An optical fiber with the coating removed is inserted into the mechanical splice. This is a structure in which the cores of the optical fibers are aligned with high accuracy by utilizing the depth of the V-groove capable of controlling the dimensions with high accuracy and the outer diameter of the glass of the optical fiber. A refractive index matching agent is filled in advance at the position where the optical fiber of the optical fiber alignment portion abuts. The refractive index matching agent has a refractive index comparable to the refractive index of the core of the optical fiber, and fills the gap between the connected optical fibers to suppress Fresnel reflection by air. In the mechanical splice, after the optical fiber core wire is removed and cut, the optical fiber can be connected by inserting the optical fiber into the mechanical splice using a dedicated assembly tool. The dedicated assembly tool inserts a wedge into the mechanical splice to provide a gap for inserting the optical fiber between the V-groove substrate and the lid member, and allows the optical fiber to be inserted into the mechanical splice.

  There is an optical connector as an optical fiber connector in which an optical fiber can be easily attached and detached. The optical fiber is fixed with an adhesive into a hole provided in the center of the ferrule. An optical fiber with the coating removed is inserted into the ferrule. The optical fiber is fixed at the center of the ferrule by using the ferrule hole and the optical fiber glass, which can control the dimensions with high precision, and the ferrules are aligned in the split sleeve installed in the adapter. This structure aligns the cores with high precision. The ferrule end face to which the optical fiber is bonded and fixed is polished. In an optical connector whose end face has been polished, the ferrules polished without using a refractive index matching agent are pressed together by a spring so that the cores of the optical fibers are closely connected (PC: Physical Contact) to suppress Fresnel reflection.

  Both the mechanical splice and the optical connector are connected using glass produced by controlling the outer diameter with high accuracy by inserting the optical fiber into the connecting member after removing the coating of the optical fiber core wire. The optical fibers are aligned.

JP 09-061655 A JP 2001-324638 A

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 connection, it is necessary to align the cores of the optical fibers with high accuracy. The glass part of the optical fiber can be manufactured by controlling the outer diameter with high accuracy. On the other hand, it is difficult to manufacture the optical fiber core wire coated with resin by controlling the outer diameter of the optical fiber with high accuracy. Therefore, in the conventional optical fiber connector, the coating of the optical fiber core wire is removed, and the cores of the optical fibers are aligned with high accuracy using the outer diameter of the glass. However, when the optical fiber connection process is carried out with the coating removed and the glass exposed, the glass used in the optical fiber is a transparent member, and the visibility is not good. There is a possibility of damaging the optical fiber in contact with the tool.

  When many optical fibers are connected by an apparatus, it is required to simply connect the optical fibers in a state where the optical fiber connectors are installed at a high density. In addition, when a large number of optical fibers are wired in a congested state to an optical fiber connector installed at a high density, if only the desired optical fiber can be extracted from the optical fiber connector, the device using the optical fiber Maintenance work becomes easy. However, in the conventional optical fiber connector, the optical fiber can be simply connected and the desired optical fiber cannot be pulled out with the optical fiber connectors installed at high density. The mechanical splice can be easily connected to the optical fiber with a dedicated assembly tool, but it is necessary to insert a wedge in a direction perpendicular to the axis of the optical fiber. Therefore, the optical fiber cannot be connected as it is, and the desired optical fiber cannot be pulled out. The optical connector can be attached and detached while it is installed at a high density. However, the optical connector requires the use of an adhesive and the end surface must be polished, so it is as simple as a mechanical splice. An optical fiber cannot be connected to. Since the optical connector fixes the optical fiber with an adhesive, it is not possible to pull out only the optical fiber after connection.

  The present invention has been made to solve the above-mentioned problems. Optical fibers can be connected in a state in which optical fibers are aligned with high precision and optical fiber connectors are installed at high density without removing the coating. Another object of the present invention is to realize an optical fiber connector that can easily carry out extraction of a desired optical fiber.

  To achieve the above object, an optical fiber connector of the present invention includes a plug that holds an optical fiber without removing the coating, and an adapter that includes an optical fiber alignment unit that aligns the optical fibers to face each other. The fiber connector, wherein the plug includes a groove portion, a lid portion, and an optical fiber gripping portion that includes a clamper for gripping an optical fiber that presses the lid portion against the groove portion. Each of the lid portions includes a fixed blade that penetrates the coating of the optical fiber and contacts the glass portion of the optical fiber in the coaxial direction with the optical fiber, and the clamper holds the lid portion against the groove portion. And an extending portion for releasing the engagement between the locking piece of the adapter and the locking hole of the plug.

  The plug includes a blade perpendicular to the axial direction of the optical fiber, and the optical fiber alignment portion is a substrate on which a portion of the coating is peeled off by the blade of the plug and the exposed glass portion of the optical fiber contacts. And a lid portion that presses the coating of the optical fiber core wire against the substrate portion, and when the plug and the adapter are fitted, the distal end portion of the plug urges the lid portion of the optical fiber alignment portion. It is good also as what presses against the said board | substrate part.

  The optical fiber alignment unit may include a refractive index matching agent to connect the optical fibers.

  The optical fiber alignment portion has a narrow hole having an inner diameter of 125 μm to 126 μm, and the optical fiber is gripped by the plug with a tapered end surface. The plug is connected to the optical fiber alignment portion. It is good also as providing the space which accept | permits the bending of an optical fiber between an optical fiber holding part.

  The optical fiber may be PC-connected by an elastic restoring force of the optical fiber itself generated by bending in a space allowing the bending.

  Since the optical fiber core wire is covered with the coating, the step of removing the optical fiber core wire coating, which has been conventionally required, becomes unnecessary. In addition, the use of an optical fiber core with a colored coating can improve the visibility of the optical fiber, making it easier to handle the optical fiber during assembly of the optical fiber connector. The optical fiber is not damaged during the assembly process.

  The adapter can be connected to the plug because the optical fiber can be removed by simply moving the clamper without the need to insert a wedge in the direction perpendicular to the axis of the optical fiber in conventional mechanical splices. Only the desired optical fiber can be pulled out in this state. By stripping part of the coating of the optical fiber in the plug, even if it is inserted in the state of the optical fiber in the plug, the optical fiber can be aligned with high precision using the glass part. Is possible.

  By using the optical fiber core wire whose end face is tapered, the polishing process of the optical fiber end face, which is necessary for the conventional optical connector, is unnecessary, and the optical fiber can be gripped without using an adhesive. Compared with the optical connector, the optical fiber can be easily PC-connected.

It is sectional drawing which shows the plug of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state before inserting an optical fiber. It is sectional drawing which shows the plug of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state after inserting an optical fiber core wire. It is sectional drawing which shows the plug of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state which moved the clamper on the cover part. It is sectional drawing which shows the plug of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state which hold | gripped the optical fiber core wire with the optical fiber holding part. It is sectional drawing which shows the adapter of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state before connecting a plug and an adapter. It is a figure which shows the state which connected the plug and adapter of the optical fiber connector by the 1st Embodiment of this invention. It is sectional drawing of the optical fiber alignment part of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state which hold | gripped the optical fiber core wire. It is sectional drawing which shows the state which connected the plug and adapter of the optical fiber connector by the 1st Embodiment of this invention, Comprising: It is a figure which shows the state which moved the clamper to the adapter side. It is sectional drawing which shows the state which connected the plug and adapter of the optical fiber connector by the 1st Embodiment of this invention, Comprising: The figure which shows the state which moved the clamper further to the adapter side and cancel | released the connection of a plug and an adapter It is. It is sectional drawing which shows the state which taper-processed the optical fiber end surface of the optical fiber connector by the 2nd Embodiment of this invention. It is sectional drawing which shows the plug of the optical fiber connector by the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state before inserting an optical fiber. It is sectional drawing which shows the plug of the optical fiber connector by the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state after inserting an optical fiber core wire. It is sectional drawing which shows the plug of the optical fiber connector by the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state which moved the clamper on the cover part. It is sectional drawing which shows the adapter of the optical fiber connector by the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state before connecting a plug and an adapter. It is a figure which shows the state which connected the plug and adapter of the optical fiber connector by the 2nd Embodiment of this invention. It is a figure which shows the state which inserts an optical fiber core wire in the optical fiber aligner of the optical fiber connector by the 2nd Embodiment of this invention. It is sectional drawing which shows the state which connected the plug and adapter of the optical fiber connector by the 2nd Embodiment of this invention, Comprising: It is a figure which shows the state which moved the clamper to the adapter side. It is sectional drawing which shows the state which connected the plug and adapter of the optical fiber connector by the 2nd Embodiment of this invention, Comprising: The figure which moves the clamper further to the adapter side, and shows the state which cancelled | released the connection of a plug and an adapter It is.

Embodiments of the present invention will be described in detail with reference to the drawings.
First, a first embodiment of the present invention will be described with reference to FIGS.
The optical fiber connector according to the first embodiment of the present invention includes a plug 100 and an adapter 500. The optical fiber uses an optical fiber core wire 107 in which the outer diameter of the glass portion 109 is 125 μm and the outer diameter of the coating 108 covering the glass portion 109 is about 250 μm.

FIG. 1 is a cross-sectional view showing a plug 100 of an optical fiber connector according to a first embodiment of the present invention, showing a state before an optical fiber is inserted.
In FIG. 1, a plug 100 of an optical fiber connector includes a groove portion 101, a lid portion 102, a clamper 103, a locking hole 104, a coating stripping blade 105, and a fixed blade 106 arranged in parallel in the optical fiber axial direction. Is provided. The plug 100 includes an optical fiber gripping part that grips the optical fiber 107. The optical fiber gripping portion includes a groove portion 101, a lid portion 102, and a clamper 103 that presses the lid portion 102 against the groove portion 101 and grips the optical fiber.

FIG. 2 is a cross-sectional view showing the plug 100 of the optical fiber connector according to the first embodiment of the present invention, showing a state after the optical fiber core wire 107 is inserted.
In FIG. 2, the optical fiber core wire 107 is inserted into a gap formed by the groove portion 101 and the lid portion 102 from the rear end portion of the plug 100. When the optical fiber core wire 107 is inserted into the plug 100, the clamper 103 is moved to the distal end side of the plug 100 so that the clamper 103 does not press the lid 102. The plug 100 includes a coating stripping blade 105 in a state orthogonal to the axial direction of the optical fiber 107, and the optical fiber core wire 107 that has passed through the optical fiber gripping portion comes into contact with the coating stripping blade 105. A part of the coating of the optical fiber core wire 107 is peeled off. After stripping off the coating, the coating stripping blade 105 is removed from the plug 100. The removed coating stripping blade 105 is reused when another plug is assembled.

FIG. 3 is a cross-sectional view showing the plug 100 of the optical fiber connector according to the first embodiment of the present invention, and shows a state in which the clamper 103 is moved onto the lid 102.
FIG. 3 shows a state in which the optical fiber 107 is gripped by moving the clamper 103 onto the lid 102 in a state where the tip of the optical fiber 107 is aligned with the tip of the plug 100.

FIG. 4 is a sectional view showing the plug 100 of the optical fiber connector according to the first embodiment of the present invention, and shows a state in which the optical fiber core wire 107 is gripped by the optical fiber gripping portion.
In FIG. 4, the groove portion 101 and the lid portion 102 include a fixed blade 106 arranged in parallel in the axial direction of the optical fiber 107, and the fixed blade 106 penetrating the coating 108 is in direct contact with the glass portion 109 of the optical fiber 107. The optical fiber 107 is held. Compared to the case where the optical fiber core 107 is gripped from the coating 108 made of resin, the gripping force of the optical fiber core 107 can be improved by directly fixing the glass portion 109.

FIG. 5 is a cross-sectional view showing the adapter 500 of the optical fiber connector according to the first embodiment of the present invention, and shows a state before the plug 100 and the adapter 500 are connected.
In FIG. 5, the adapter 500 includes an optical fiber alignment portion 501 that aligns optical fibers 107 to be connected to each other, and a locking piece 505. The optical fiber alignment unit 501 includes a substrate unit 502, a lid unit 503, and a refractive index matching agent 504.

FIG. 6 is a diagram illustrating a state in which the plug 100 and the adapter 500 of the optical fiber connector according to the first embodiment of the present invention are connected.
In FIG. 6, the optical fiber core wire 107 from which a part of the coating 108 has been peeled off by the plug 100 is inserted into the optical fiber alignment portion 501. The lid portion 503 of the optical fiber alignment portion 501 is pressed against the substrate portion 502 side by the plug 100. Further, the clamper 103 includes a clamper extending portion 110 and a clamper optical fiber gripping portion 111, and the optical fiber core wire 107 is gripped by the clamper optical fiber gripping portion 111.

FIG. 7 is a cross-sectional view of the optical fiber aligning portion 501 of the optical fiber connector according to the first embodiment of the present invention, showing a state where the optical fiber core wire 107 is gripped.
In FIG. 7, the glass portion 109 exposed by peeling off the coating 108 comes into contact with the substrate portion 502 and presses the coating 108 of the optical fiber core wire 107 toward the substrate portion 502 side. The optical fiber core wire 107 in a state in which the coating 108 is completely attached is pressed from above the coating 108 because the thickness of the coating 108 is not constant and the position of the glass portion 109 is also eccentric with respect to the outer diameter of the coating 108. It is not possible to align the cores of the optical fiber 107 with high precision. In the present invention, the cores of the optical fibers 107 to be abutted are aligned with high accuracy by using the glass portion 109 exposed by peeling off a part of the coating 108. There is a refractive index matching agent 504 at the center of the optical fiber alignment portion 501, and the Fresnel reflection between the optical fibers 107 abutted by this refractive index matching agent 504 is suppressed. The plug 100 and the adapter 500 maintain the connection between the plug 100 and the adapter 500 by fitting the locking hole 104 of the plug 100 and the locking piece 505 of the adapter 500.

FIG. 8 is a cross-sectional view showing a state where the plug 100 of the optical fiber connector according to the first embodiment of the present invention and the adapter 500 are connected, and shows a state where the clamper 103 is moved to the adapter 500 side. is there.
In FIG. 8, the gripper of the optical fiber core wire 107 can be released by moving the clamper 103 pressing the lid 102 toward the adapter 500, so that the plug 100 and the adapter 500 remain connected to each other. Only the fiber 107 can be extracted.

FIG. 9 is a cross-sectional view showing a state where the plug 100 and the adapter 500 of the optical fiber connector according to the first embodiment of the present invention are connected. The clamper 103 is further moved to the adapter 500 side, and the plug 100 and the adapter are connected. It is a figure which shows the state which cancelled | released connection of 500. FIG.
In FIG. 9, the clamper 103 is further moved toward the adapter 500, whereby the extending portion 110 of the clamper 103 releases the engagement between the locking hole 104 of the plug 100 and the locking piece 505 of the adapter 500. The adapter 500 can be disconnected.

Next, a second embodiment of the present invention will be described with reference to FIGS.
The optical fiber connector according to the second embodiment of the present invention includes a plug 1100 and an adapter 1400. As the optical fiber, an optical fiber core wire 1000 having an outer diameter of the glass portion 1001 of 125 μm and an outer diameter of the coating 1002 covering the glass portion 1001 of about 250 μm is used. The optical fiber core wire 1000 is cut without removing the coating 1002, and the end face of the optical fiber is tapered. The taper processing can be realized by bending an optical fiber against a polishing sheet and pressing it to draw a circular orbit. In order to connect the optical fiber to the PC, the end face of the optical fiber is polished in the conventional optical connector. However, as shown in Non-Patent Document 1, the end face of the optical fiber is cleaved so that the optical fiber is not polished. The end face can be PC-connected.

FIG. 10 is a cross-sectional view showing a state where the end face of the optical fiber of the optical fiber connector according to the second embodiment of the present invention is tapered.
As shown in FIG. 10, when taper processing is performed without removing the coating 1002, the portion in contact with the polishing sheet is in a state where the coating 1002 and the glass 1001 are scraped.

FIG. 11 is a cross-sectional view showing the plug 1100 of the optical fiber connector according to the second embodiment of the present invention, showing a state before the optical fiber 1000 is inserted.
In FIG. 11, the plug 1100 includes a groove 1101, a lid 1102, a clamper 1103, a locking hole 1104, an optical fiber bending space 1105, and fixed blades 1106 arranged in parallel. The plug 1100 includes an optical fiber gripping part that grips the optical fiber 1000. The optical fiber gripping portion includes a groove portion 1101, a lid portion 1102, and a clamper 1103 that presses the lid portion 1102 against the groove portion 1101 and grips the optical fiber 1000, and has the same structure as the optical fiber gripping portion shown in FIG. The fiber core wire 1000 is gripped.

FIG. 12 is a cross-sectional view showing the plug 1100 of the optical fiber connector according to the second embodiment of the present invention, and shows a state after the optical fiber core wire 1000 is inserted.
In FIG. 12, the optical fiber core wire 1000 is inserted into the gap formed by the groove portion 1101 and the lid portion 1102 from the rear end portion of the plug 1100. When inserting the optical fiber core wire 1000 into the plug 1100, the clamper 1103 is moved to the distal end side of the plug 1100 so that the clamper 1103 does not press the lid 1102.

FIG. 13 is a cross-sectional view showing the plug 1100 of the optical fiber connector according to the second embodiment of the present invention, and shows a state where the clamper 1103 is moved onto the lid 1102.
In FIG. 13, the clamper 1103 is moved onto the lid 1102 with the tip of the inserted optical fiber 1000 protruding from the tip of the plug 1100 by about 100 μm, and the lid 1102 is pressed against the groove 1101 so as to The fiber core wire 1000 is gripped.

FIG. 14 is a cross-sectional view showing the adapter 1400 of the optical fiber connector according to the second embodiment of the present invention, showing a state before the plug 1100 and the adapter 1400 are connected.
In FIG. 14, the adapter 1400 includes an optical fiber alignment unit 1401 that aligns the optical fibers 1000 to be connected to each other, and a locking piece 1402.

FIG. 15 is a diagram illustrating a state where the plug 1100 and the adapter 1400 of the optical fiber connector according to the second embodiment of the present invention are connected.
In FIG. 15, the tip of the optical fiber core wire 1000 is inserted into the optical fiber aligning portion 1401 in the state shown in FIG. The optical fiber alignment portion 1401 is a hole having an inner diameter in the range of 125 μm to 126 μm, and is slightly larger than the outer diameter of the glass portion of the optical fiber.

FIG. 16 is a diagram showing a state in which the optical fiber core wire 1000 is inserted into the optical fiber aligner 1401 of the optical fiber connector according to the second embodiment of the present invention.
In FIG. 16, the optical fiber core wire 1000 is inserted into the small-diameter hole of the optical fiber aligning portion 1401. When the tapered optical fiber core wire 1000 is inserted into the optical fiber alignment portion 1401, the coating 1002 is peeled off at the end of the small-diameter hole 1403, and only the glass portion 1001 of the optical fiber 1000 is inserted into the hole. The Since the coating 1002 near the tip of the optical fiber is peeled off from the glass 1001 by tapering with the coating 1002 attached, the optical fiber 107 is simply inserted into the hole 1403 of the optical fiber alignment unit 1401. 1002 can be removed. Even if the optical fiber 1000 is held by the plug 1100 and inserted into the adapter 1400, the small diameter hole 1403 of the optical fiber aligning portion 1401 uses the outer diameter of the glass portion 109 of the optical fiber 1000 to make the optical fiber 1000. The cores can be aligned with high accuracy. An optical fiber core 1000 is used in which the tip end portion of the optical fiber 1000 that is tapered has a taper angle of 30 to 60 degrees and an end face diameter of 30 to 50 μm. In order to reliably insert and align the outer diameter of the glass portion 109 of the optical fiber 107 that is not tapered into the small-diameter hole 1403, the length of the optical fiber alignment portion 1401 is longer than 0.5 mm.

  As shown in FIG. 15, when the plug 1100 and the adapter 1400 are connected, the optical fiber core 1000 is held by the plug 1100 with the end of the optical fiber core 1000 protruding from the end surface of the plug 1100. When the optical fibers 1000 are abutted in the adapter 1400, the optical fibers 1000 are bent. The optical fiber end faces that are abutted by the pressing force generated by the bending are PC-connected. The pressing force due to the bending is inversely proportional to the length of the bending space. For example, when the length of the bending space is 8 mm, the generated pressing force is about 0.5N. The plug 1100 and the adapter 1400 maintain the connection between the plug 1100 and the adapter 1400 by fitting the locking hole 1104 of the plug 1100 and the locking piece 1402 of the adapter 1400.

FIG. 17 is a cross-sectional view showing a state where the plug 1100 and the adapter 1400 of the optical fiber connector according to the second embodiment of the present invention are connected, and shows a state where the clamper is moved to the adapter side.
In FIG. 17, since the gripping of the optical fiber core wire 1000 can be released by moving the clamper 1103 pressing the lid portion 1102 to the adapter 1400 side, the plug 1100 and the adapter 1400 remain connected. Only the fiber 1000 can be extracted.

FIG. 18 is a cross-sectional view showing a state in which the plug 1100 and the adapter 1400 of the optical fiber connector according to the second embodiment of the present invention are connected, and the clamper 1103 is further moved to the adapter 1400 side. It is a figure which shows the state which cancelled | released connection of 1400. FIG.
In FIG. 18, when the clamper is further moved to the adapter side, the extending portion of the clamper 1103 releases the engagement between the locking hole 1104 of the plug 1100 and the locking piece 1402 of the adapter 1400, so that the plug 1100 and the adapter 1400 The connection can be released.

  As described above, according to the present invention, since the optical fiber core 1000 is handled with the coating 1002 attached, the step of removing the coating 1002 of the optical fiber core 1000, which has been conventionally required, becomes unnecessary. . Further, since the visibility of the optical fiber 1000 can be improved by using the optical fiber core wire 1000 colored with the coating 108, the optical fiber 1000 can be easily handled in the assembly work of the optical fiber connector. The optical fiber 1000 is not damaged during the assembly operation of the optical fiber connector.

  Since it is possible to remove the optical fiber 1000 only by moving the clamper without the need to insert a wedge in the direction perpendicular to the axis of the optical fiber 1000 in the conventional mechanical splice, the adapter and plug Only the desired optical fiber can be pulled out while being connected. By stripping off a part of the coating 1002 of the optical fiber core wire 1000 in the plug, even if the optical fiber core wire 107 is inserted into the plug in the state of the optical fiber core wire 107, the optical fiber core wire 1000 is raised using the glass portion 1001. It becomes possible to align with accuracy.

  By using the optical fiber core wire 1000 whose end face is tapered, the polishing process of the end face of the optical fiber which is necessary for the conventional optical connector is unnecessary, and the optical fiber 1000 can be gripped without using an adhesive. As compared with the conventional optical connector, the optical fiber 1000 can be easily PC-connected.

100, 1100 Plug 101, 1101 Groove 102, 1102 Lid 103, 1103 Clamper 104, 1104 Locking hole 105 Cover stripping blade 106, 1106 Fixed blade 107, 1000 Optical fiber core wire 108, 1002 Cover 109, 1001 Glass part 110 Clamper extension part 111 Clamper optical fiber gripping part 500 1400 Adapter 501 1401 Optical fiber aligner 502 Substrate part 503 Lid part 504 Refractive index matching agent 505 Locking piece 1105 Optical fiber bending space

Claims (5)

A plug that grips the optical fiber without removing the coating;
An optical fiber connector comprising an adapter having an optical fiber alignment portion that aligns optical fibers to face each other,
The plug includes an optical fiber gripping portion that includes a groove portion, a lid portion, and a clamper for gripping an optical fiber that presses the lid portion against the groove portion.
Each of the groove portion and the lid portion includes a fixed blade that penetrates the coating of the optical fiber and contacts the glass portion of the optical fiber in the coaxial direction with the optical fiber,
The optical fiber connector according to claim 1, wherein the clamper includes a gripping portion that presses the lid portion against the groove portion, and an extending portion that releases the engagement between the locking piece of the adapter and the locking hole of the plug. The plug includes a blade perpendicular to the axial direction of the optical fiber,
The optical fiber alignment unit includes a substrate part that comes into contact with a glass part of an optical fiber that is exposed by peeling off a part of the coating by the blade of the plug, and a lid part that presses the coating of the optical fiber core wire against the substrate part 2. The optical fiber according to claim 1, wherein when the plug and the adapter are fitted, a tip portion of the plug presses the lid portion of the optical fiber alignment portion against the substrate portion. Connector.   The optical fiber connector according to claim 2, wherein the optical fiber alignment unit includes a refractive index matching agent and connects the optical fibers to each other. The optical fiber alignment portion has a small diameter hole having an inner diameter of 125 μm to 126 μm,
The optical fiber is gripped by the plug with the end face tapered.
2. The optical fiber connector according to claim 1, wherein the plug includes a space that allows bending of the optical fiber between the optical fiber alignment unit and the optical fiber gripping unit.   The optical fiber connector according to claim 4, wherein the optical fiber is PC-connected by an elastic restoring force of the optical fiber itself that is generated by bending in a space allowing the bending.

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