JP5071980B2 - Fiber optic connector - Google Patents

Description

  The present invention relates to an optical fiber connector for optical communication, and more particularly to an optical fiber connector that is easy to assemble and has optical characteristics similar to those of a normal optical fiber connector.

  FIG. 1 shows a basic structure of an example of a conventional optical fiber connector (first conventional example). This connector is a ferrule 11 and a housing 12 corresponding to various optical fiber connectors arranged around the ferrule 11. And an optical fiber fixing part 13 connected to the rear end of the ferrule 11 (see Non-Patent Document 1).

  In this connector, the optical fiber 14 that has been cleaved with a predetermined amount of the coating on the tip is inserted from the rear end of the optical fiber fixing portion 13, and the tip of the optical fiber 14 and the tip of the ferrule 11 are aligned, The optical fiber 14 is completed by holding the coated portion on the optical fiber fixing portion 13. Here, the alignment of the tip of the optical fiber 14 and the tip of the ferrule 11 is performed by abutting a flat abutting plate 15 against the tip of the ferrule 11 as shown in FIG. The optical fiber fixing portion 13 includes a base 13a and a lid 13b. The base 13a is provided with a V-groove having a depth from which the outer diameter of the coated portion of the optical fiber protrudes somewhat as shown in FIG. The optical fiber 14 is held by fixing the lid 13b to the base 13a with a magnet or the like in a state where the coated portion of the optical fiber 14 is accommodated in the V-groove.

  As shown in FIG. 4, this connector is connected to a similar optical fiber connector to be connected via an adapter 20. Although the fitting mechanism differs depending on the type of optical fiber connector, basically, a protrusion formed on the housing 12 is locked by a claw of the adapter 20 and is always pushed forward from the housing 12 via a spring. The end face of 11 is pressed against the end face of the ferrule of the optical fiber connector to be connected. As a result, the distal end surface of the optical fiber 14 comes into contact with the distal end surface of the optical fiber of the optical fiber connector to be connected to complete the optical connection.

  According to this connector, the optical fiber connector is completed by a simple optical fiber tip processing operation such as removal and cleaving of the optical fiber and simple assembly operations such as insertion of the optical fiber and closure of the lid.

  However, the optical fiber cleavage plane has an angular deviation from the vertical plane with respect to the axial direction, and is not completely flat. With this connector, the end faces of the optical fibers are not in close contact with each other. There was a problem that the loss was large.

  FIG. 5 shows the basic structure of another example of the conventional optical fiber connector (second conventional example). This connector, together with the ferrule 31, has the same housing and optical fiber fixing part as in the first conventional example. (However, the housing and the optical fiber fixing portion are not shown), and a space 31a in which the optical fiber bends exists inside the ferrule 31 (see Patent Document 1).

  In this connector, an optical fiber 32 that has been cleaved after removing a predetermined amount of the coating from the tip is inserted from the rear end of the optical fiber fixing portion, and the tip of the optical fiber 32 protrudes from the tip of the ferrule 31 by a predetermined amount. Then, the coated portion of the optical fiber 32 is held by the optical fiber fixing portion (here, bonded and fixed) to complete. Here, the adjustment of the protruding amount of the optical fiber 32 from the tip of the ferrule 31 is performed by pressing a butting plate 33 having a lead-in portion depressed by the protruding amount as shown in FIG. Is done.

  As in the case of the first conventional example, this connector is connected to a similar optical fiber connector to be connected via an adapter. That is, the housing is locked to the adapter, and the end surface of the ferrule 31 that is always pushed forward from the housing via the spring is pressed against the end surface of the ferrule of the optical fiber connector to be connected. As a result, the distal end surface of the optical fiber 32 comes into contact with the distal end surface of the optical fiber of the optical fiber connector to be connected, and the optical connection is completed.

  In the connected state, the tip of the optical fiber 32 protruding from the tip of the ferrule 31 moves backward and bends in the space 31a inside the ferrule 31, but due to the force pushing the optical fiber 32 generated due to this deflection forward. This is intended for close contact between optical fibers which is not realized in the first conventional example.

  However, even with this connector, the angle deviation from the vertical plane of the cleavage plane of the optical fiber with respect to the axial direction and the problem that the cleavage plane is not completely flat have been solved and the optical fibers have not been brought into close contact with each other. There was still a problem that connection loss and reflection loss were large.

  FIG. 7 shows a basic structure of still another example of a conventional optical fiber connector (third conventional example). This connector includes an optical fiber fixing member 41 for holding two optical fibers in a cantilever shape, It consists of the microhole 42 (refer patent document 2).

  The connector is cleaved by removing a predetermined amount of the coating from the tip, and two optical fibers 43 and 44 that are further tapered are inserted into the microholes 42. This is completed by fixing the coated portions of the optical fibers 43 and 44 to the optical fiber fixing member 41 in a state where the rear is bent. The feature is that no ferrule is used.

  As shown in FIG. 8, the cleavage plane of the optical fiber is not completely flat, and ripples are generated in the circumferential portion. By applying taper processing, this ripple can be removed and the area of the optical signal can be reduced while leaving the vicinity of the core. Therefore, it is easy to realize a so-called PC (Physical Contact) connection state in which optical fibers are in close contact with each other. Thus, a low-loss, low-reflection optical connection can be realized.

  As shown in FIG. 9, a detachable optical connector can also be realized by dividing the optical fiber fixing member 41 into two optical connector plugs 45 and 46 that respectively hold two optical fibers.

However, this connector has a special structure that does not use a ferrule, is incompatible with the conventional optical fiber connector, and the microhole is a hole that is slightly larger than the outer diameter of the optical fiber with the coating removed. Therefore, there was a problem that it was very small and cleaning was difficult.
Japanese Patent No. 2566590 (Title of Invention: Optical Connector) Japanese Patent No. 3210540 (Title of Invention: Optical Fiber Connection Method) "Simple connector", [online], Oshima Prototype Laboratory, Inc. [searched on January 17, 2008], Internet <URL: http://www.iijnet.or.jp/oshima/Jhome/optical/ 05.html>

  Thus, conventionally, there has been no optical fiber connector that is easy to assemble, has optical characteristics similar to those of a normal optical fiber connector, is compatible with a conventional optical fiber connector, and is easy to clean.

  Therefore, the present invention provides an optical fiber connector that is easy to assemble, has optical characteristics similar to those of ordinary optical fiber connectors, is compatible with conventional optical fiber connectors, and is easy to clean. Objective.

In order to achieve such an object, the present invention includes a ferrule, a flange for gripping the ferrule, and an optical fiber holding portion connected to the rear end of the flange, and the flange has a space in which the optical fiber bends. The optical fiber holding portion has a structure for elastically holding the coated portion of the optical fiber, the coating is removed and cleaved, and the tip of the tapered optical fiber is 0.04 mm or more and 0.1 mm from the tip of the ferrule. A state where the tip of the optical fiber is protruded against the adjusting jig in the assembly so that the length of the optical fiber is protruded, and is bent behind the optical fiber holding portion so as not to bend inside the space. in the sheathed portion of the optical fiber is fixed in the optical fiber holding unit, the optical fiber, the elastic constant is 71.2GPa, outer diameter 0.125 mm, co In the case of a communication single mode optical fiber having a diameter of 30 μm or less, the end surface diameter of the tip of the optical fiber tapered by a deflection length of 8 mm is 30 μm, or tapered by a deflection length of 7 mm. An optical fiber connector characterized in that an end face diameter of the tip of the optical fiber is 30 μm to 40 μm, or an end face diameter of the tip of the optical fiber tapered by a deflection length of 6 mm is 30 μm to 45 μm. Propose.

  According to the present invention, an optical fiber holding structure is provided at the rear end of a conventional optical fiber connector, and the optical fiber has a flex space inside thereof. After cleaving and tapering the optical fiber, Since the protrusion is set and fixed, the assembly is easy and the PC connection of the cleavage plane can be realized, so that an optical fiber connector having good optical characteristics can be realized at low cost. It is possible to provide an optical fiber connector that is compatible with the connector and easy to clean.

  10 (a) and 10 (b) show an appearance of an example of an embodiment of an optical fiber connector of the present invention, here an example compatible with an SC connector having the highest market share among optical fiber connectors. The difference from a normal optical fiber connector is that the rear end has an optical fiber holding part consisting of a base and a lid, and a clamper having a cross-section such that the U-shaped opening side is slightly narrower is attached to this, The optical fiber is held elastically. FIG. 11 shows a cross-sectional structure of the optical fiber connector of the present embodiment.

  10 and 11, 51 is a ferrule, 52 is a flange, 53a is an optical fiber holder base, 53b is an optical fiber holder lid, 54 is a clamper, 55 is a frame, 56 is a frame knob, 57 is a stop ring, 58 is a spring and 59 is an optical fiber.

  The ferrule 51 is made of zirconia or the like, has a through hole having an inner diameter substantially equal to the outer diameter of the optical fiber 59 from which the coating has been removed, and is held and fixed to the flange 52. The flange 52 extends rearward and is connected to the optical fiber holding portion base 53a. The flange 52 is provided with a space 52 a communicating with the through-hole of the ferrule 51 and allowing the optical fiber 59 to bend. The frame 55 and the stop ring 57 are fixed to each other by a fastening portion 57a, and the ferrule 51 is pushed forward through the flange 52 by a spring 58 whose position is regulated by the stop ring 57. However, the rod 55a of the frame 55 does not advance more than a certain amount. The knob 56 is a hand-held part, and assists the operation of inserting and removing the optical fiber connector with respect to the adapter.

  The optical fiber 59 is premised on a glass optical fiber, and on the premise of applying a general optical fiber strand in which the outer diameter of the glass portion from which the optical fiber coating is removed is 125 μm and the outer diameter of the coated portion is about 250 to 500 μm. This will be described below. As shown in FIG. 11, the coating of the optical fiber 59 is removed slightly longer than the length of the through hole of the ferrule 51 (here, about 10 mm), its tip is cleaved, and further tapered. And it is hold | maintained at the optical fiber holding | maintenance part 53 in the state protruded from the end surface of the ferrule 51 by predetermined amount.

  The optical fiber holding portion base 53a has a V-groove, and the cover 53b is pressed against the base 53a by the clamper 54 in a state where the coated portion of the optical fiber 59 is accommodated in the V-groove, thereby elastically holding the optical fiber 59. Since the glass portion from which the optical fiber coating is removed is not held, the optical fiber is not damaged and disconnected.

  The optical fiber can be cleaved with a commercially available optical fiber cleaver. As shown in FIG. 12, the taper processing can be performed by bending the tip of the optical fiber 59 against the polishing sheet 60 and pressing it to draw a circular orbit. Taper processing is possible by a very simple method.

  FIG. 13 shows a state when the optical fiber connector of the present invention is connected. FIG. 13 (a) shows a cross section of the optical fiber connector, and FIG. 13 (b) shows a main part of the connection portion.

  As shown in FIG. 5B, the ferrule 51 of the two optical fiber connectors is aligned and opposed by the alignment member (generally called a sleeve) 21 of the adapter 20 as shown in FIG. The end face of the ferrule 51 that is locked by the claw 22 of the adapter 20 and is pushed forward together with the flange 52 by the spring 58 from the frame 55 through the stop ring 57 is the optical fiber of the connection partner. This is done by pressing against the end face of the ferrule of the connector. Further, the optical fiber 59 protruding from the end face of the ferrule 51 before the connection is drawn, and the optical fiber 59 is bent in the bending space 52 a inside the flange 52. The optical fiber 59 is pressed against the optical fiber of the optical fiber connector to be connected by the elastic restoring force generated due to the deflection at this time. Even on the cleaved surface, the ripple on the circumference of the optical fiber is removed by taper processing, and the area is small except for the vicinity of the core through which the optical signal passes, so the optical fibers are connected to each other by PC (Physical Contact). Low loss, low reflection optical connection can be realized.

  14 to 17 show an assembly process of the optical fiber connector of the present invention. FIGS. 14A, 14B, and 15 show the state before the optical fiber is inserted.

  FIG. 14A shows a state before the clamper is attached. As shown in FIG. 14B, the clamper 54 is mounted in the groove 53a 'of the optical fiber holding portion base 53a. The thickness of the base 53a is small in the groove 53a 'with respect to the inner width of the U-shape of the clamper 54, and is thicker in the other portions, and can be easily moved, but cannot be removed. Further, the optical fiber holding portion lid 53b is restricted in movement in the front-rear direction within a predetermined clearance by the base 53a, and is restricted in movement in the left-right direction and upward by the knob 56 within a predetermined clearance. According to this structure, it can be realized with a simpler structure than a structure in which the movement of the lid is limited only by the base so that the lid does not fall off from the optical fiber connector body even in the initial state before the lid is clamped. The optical fiber holder lid 53b is also provided with the same groove 53b 'as described above.

  As shown in FIG. 15, when the optical fiber 59 having a tapered end and a taper processed is inserted from the rear end, as shown in FIG. Now, the fiber protruding amount from the end face of the ferrule 51 is set. At that time, the optical fiber 59 is bent at the rear end as shown in FIG. By the occurrence of the deflection, it can be confirmed that the optical fiber 59 is reliably projected and abutted against the adjusting jig 61.

  This deflection length is set to be longer than the deflection length inside the optical fiber connector. As a result, there is no deflection inside the optical fiber connector. If the optical fiber is fixed in a bent state, the optical fiber protrudes more than a predetermined amount after the protrusion adjusting jig 61 is removed. This phenomenon can be eliminated by lengthening the deflection at the rear end.

  The fixing of the optical fiber is completed by moving the clamper 54 forward as shown in FIG. The sum of the thickness of the lid 53b and the lower portion of the base 53a is larger than the inner width of the U-shape of the clamper 54, the spring force of the clamper 54 works, the lid 53b is pressed against the base 53a, and the fixing is completed.

  The clamper 54 has a tongue-like shape extending toward the rear end, and this portion is pushed when moving forward. When this portion is pushed all the way and coincides with the rear end of the optical fiber holding portion base 53a, the clamper 54 reaches a position where the lid is optimally pushed. This makes the operation easy and accurate.

  As described above, according to the optical fiber connector of the present embodiment, first, the structure is structurally compatible with the existing optical connector, and this also diverts the components of the existing optical connector. However, it can be configured at low cost by newly configuring only the optical fiber holding portion.

  As a method for cutting an optical fiber, there is a method using a carbon dioxide gas laser or an excimer laser in addition to cleavage. These lasers are currently large-scale devices and are not suitable for simple operations. However, a smooth end face can be formed in a short time by melting glass, and can be applied similarly to polishing.

  In addition, here, taper processing is adopted as an optimum forming method for removing ripples on the cleavage plane of the optical fiber. However, it is sufficient if the circumferential portion can be removed, and it can be adopted if it can be processed by a laser or the like.

  In addition to the same cleaving work as before, the processing of the tip of the optical fiber increases the taper machining work, but the machining work is very simple and sufficiently simple compared to the conventional optical connector polishing work. doing.

  Further, in assembly, the optical fiber can be inserted into the optical fiber connector, the protruding amount can be adjusted by the protruding adjusting jig, and this can be fixed by the advance of the clamper, and a series of operations is simple. In addition, since the PC is realized by using the cleavage plane of the optical fiber, it is possible to realize good optical characteristics equivalent to those of the conventional optical fiber connector.

  Further, when the clamper moves forward, the clamper is housed along the inside of the knob and along the optical fiber holding portion, thereby realizing a reduction in size of the optical connector.

  In addition, if components such as a ferrule, a frame, and a knob are changed, it is basically applicable to other optical connectors such as an MU type optical connector and an LC type optical connector with the same structure. Further, since the tip end face of the optical fiber protrudes slightly from the end face of the ferrule, it can be easily cleaned with a generally used optical connector cleaner or the like.

  Next, a unique design value for reliably realizing PC connection will be described.

  The buckling force Pb is inversely proportional to the square of the deflection length L and is expressed by the following equation (S. Timoshenko, "Strength of Materials, Part II, Advanced Theory and Problems, Third Edition," New York: D. Van Nostrand Company, Inc., 1956.).

Pb = 4π ² EI / L ² (1)
Here, E is an elastic constant of the optical fiber, and I is a moment of inertia of the cross section, which is expressed by the following equation.

^{I = πd 4/64 (2} )
Here, d is the outer diameter of the optical fiber. FIG. 18 illustrates the relationship between the deflection length and the buckling force. For example, when the deflection length L = 7 mm, the buckling force Pb = 0.7N, and when the deflection length L = 8 mm, the buckling force Pb = 0.5N.

  The protrusion amount ΔL does not affect the buckling force and determines the deflection amount δ. The relationship between the two is expressed by the following equation (M. Kobayashi, T. Yoshida, S. Asakawa, S. Iwano, R. Nagase S. Sumida, S. Mitachi, "Injection-molded sigle-mode multiple optical fiber connector using buckling force of bare fiber, "IEEE, J. Selected Topics in Quantum Electronics, Vol. 5, No. 5, pp. 1271-1277, 1999.).

  Here, “Elliptic ()” is a second elliptic complete elliptic integral.

  FIG. 19 illustrates the relationship between the optical fiber protrusion amount and the deflection amount. When the deflection length L is 7 mm, the deflection δ is about 0.3 mm when the protrusion amount ΔL is 0.05 mm. When the deflection length L is 8 mm, the deflection δ is about 0.5 mm when the protrusion amount ΔL is 0.1 mm.

  FIG. 20 shows the result of calculating the protrusion amount ΔL at which the bending loss is 0.1 dB with respect to the deflection length L. If the deflection length L is reduced, the buckling force Pb can be increased, but a large loss occurs even with a small protrusion amount ΔL. Since it is difficult to set the protrusion amount ΔL, if the lower limit is set to 0.04 mm, the lower limit of the deflection length L is about 6 mm.

  On the other hand, FIG. 21 shows the results of experimental measurement of the stress required to make the cleavage plane PC. Results of measuring the load required for PC when the end face diameter is changed by taper processing on the optical fiber cleavage plane with different end face normality (angle of deviation of the end face (cleavage face) from the vertical plane with respect to the axial direction of the optical fiber) It is.

  The smaller the end face perpendicularity and the smaller the end face diameter, the smaller the required load. However, the end face perpendicularity of the cleaved surface of the optical fiber by a normal optical fiber cleaver is about 1.5 degrees at maximum. In order to realize the PC with certainty, the inventors found that it is necessary to set the end face diameter and the PC load in the hatched area in the figure.

  The lower limit of the end face diameter is 30 μm, and if this is smaller than this value, the communication light propagating through the core is affected. At this time, it was found from the figure that a minimum pressing force of 0.5 N is necessary. This can be achieved with a deflection length L = 8 mm.

  On the other hand, the maximum load is determined by the deflection length L = 6 mm for preventing the bending loss from increasing. Accordingly, in this embodiment, the length of the deflection is L = 8 mm, the end face diameter is 30 μm, the end face diameter is 30 to 40 μm when L = 7 mm, and the end face diameter is 30 to 45 μm when L = 6 mm. If there is an end face perpendicularity of the cleaved surface of the optical fiber, the PC connection can be realized without fail.

  In the above description, the cleaving surface of the optical fiber is used to simplify the operation of forming the optical fiber end surface. However, the present invention can also be applied to the case where the optical fiber end surface is polished. In this case, although it may be used in combination with taper processing, generally, the polished surface has a spherical surface and the core portion protrudes, so that PC connection can be realized even without the taper surface. The necessary pressing force at this time is 0.5 N or less, which is smaller than that of the cleavage plane.

  FIG. 22 shows optical characteristics when the optical connector manufactured according to the present embodiment is connected to a normal SC optical connector plug via the SC optical connector adapter. It is a histogram of insertion loss and return loss. The average insertion loss is 0.1 dB, the return loss is 50 dB, and low loss and low reflection equivalent to those of a normal SC optical connector are realized.

  FIG. 23 shows the result of examining the change characteristic of the insertion loss during the temperature cycle test. It shows stable characteristics over a wide temperature range. This is because the optical connection is realized by bending the optical fiber, so that even if the optical connector member expands or contracts due to a temperature change, the bent portion has an effect of absorbing this.

  As described above, according to the optical fiber connector of the present embodiment, it is easy to assemble, achieves optical characteristics similar to a normal optical fiber connector, and is compatible with a conventional optical connector, An optical fiber connector that can be easily cleaned can be provided.

  Compared with the first conventional example, the end of the optical fiber is tapered, the flex space is installed inside the connector, and the end of the optical fiber protrudes from the ferrule and is fixed so that it can be connected to the mating connector. Is realized, and good optical characteristics are realized. Further, the optical fiber holding part realizes gripping by moving the clamp in the front-rear direction, thereby realizing a small structure.

  Compared with the second conventional example, PC connection is realized by taper processing of the optical fiber tip. Further, in the second conventional example, a flexible space is formed inside the ferrule, but in the present invention, an existing zirconia ferrule can be used by providing a flange for gripping the ferrule, and the member can be manufactured at a lower cost. Can be configured. Further, in the second conventional example, the optical fiber is bonded and fixed, but it can be fixed by a clamp and is easy to assemble. In the second conventional example, the glass portion from which the optical fiber coating is removed is bent, whereas in the present invention, the coated portion of the optical fiber is bent, so that it is difficult to break.

  Compared with the third conventional example, it is compatible with the conventional optical connector, and in the third conventional example, since the optical fiber is directly aligned with the micro hole, the inner diameter of the micro hole is small and easy to clean. On the other hand, in the present invention, since the tip of the optical fiber protrudes from the tip of the ferrule, there is an advantage that cleaning is easy.

Structure diagram showing first conventional example of optical fiber connector Explanatory drawing which shows the state at the time of the assembly of a 1st prior art example Structure diagram of optical fiber fixing part of first conventional example Explanatory drawing which shows the state at the time of the connection of a 1st prior art example Structure diagram showing second conventional example of optical fiber connector Explanatory drawing of the butting jig used in the second conventional example Structure diagram showing third conventional example of optical fiber connector Explanatory drawing of cleavage plane of optical fiber Structure diagram showing another example of the third conventional example 1 is an external perspective view showing an example of an embodiment of an optical fiber connector of the present invention. Sectional structure diagram showing an example of an embodiment of an optical fiber connector of the present invention Explanatory drawing which shows an example of the taper processing method of the optical fiber tip Explanatory drawing which shows the state at the time of connection of the optical fiber connector of this Embodiment Explanatory drawing which shows the assembly process of the optical fiber connector of this Embodiment Explanatory drawing which shows the assembly process of the optical fiber connector of this Embodiment Explanatory drawing which shows the assembly process of the optical fiber connector of this Embodiment Explanatory drawing which shows the assembly process of the optical fiber connector of this Embodiment Explanatory diagram showing the relationship between deflection length and buckling force Explanatory drawing showing the relationship between optical fiber protrusion and deflection Explanatory drawing showing the amount of protrusion that generates a loss of 0.1 dB with respect to the deflection length Explanatory drawing showing the relationship between end face diameter of optical fiber and PC load Explanatory drawing which shows the optical characteristic of the optical fiber connector of this Embodiment Explanatory drawing which shows the change of the insertion loss at the time of the temperature cycle test of the optical fiber connector of this Embodiment

Explanation of symbols

  51: Ferrule, 52: Flange, 52a: Deflection space, 53: Optical fiber holder, 53a: Optical fiber holder base, 53b: Optical fiber holder lid, 54: Clamper, 55: Frame, 56: Frame knob 57: Stop ring, 58: Spring, 59: Optical fiber, 60: Polishing sheet, 61: Projection adjusting jig.

Claims (4)

A ferrule, a flange that grips the ferrule, an optical fiber holding portion that is coupled to the rear end of the flange, and an optical fiber that is cleaved with the coating removed and tapered.
The flange has a space where the optical fiber bends inside.
The optical fiber holder has a structure that elastically holds the coated portion of the optical fiber,
In assembly, the tip of the optical fiber protrudes from the tip of the ferrule so that the length of the optical fiber protrudes by 0.04 mm or more and less than 0.1 mm. In a state where it is bent behind the optical fiber holding part so that it does not occur, the coated part is elastically held by the optical fiber holding part ,
When the optical fiber is a communication single mode optical fiber having an elastic constant of 71.2 GPa, an outer diameter of 0.125 mm, and a core diameter of 30 μm or less,
The end face diameter of the tip of the optical fiber that is tapered with a deflection length of 8 mm is 30 μm.
Or
The end face diameter of the tip of the optical fiber that is tapered with a deflection length of 7 mm is 30 μm to 40 μm.
Or
The end face diameter of the tip of the optical fiber that is tapered with a deflection length of 6 mm is 30 μm to 45 μm.
An optical fiber connector characterized by that. The optical fiber connector according to claim 1, wherein
The coating is not removed at the part where the optical fiber bends,
An optical fiber connector characterized by that. The optical fiber connector according to claim 1 or 2,
The optical fiber holding part consists of a base having a V groove and a lid,
The lid is arranged between the base and a frame knob formed so as to cover a part of the optical fiber holding portion, and the movement is limited by the base and the frame knob.
An optical fiber connector characterized by that. In the optical fiber connector according to any one of claims 1 to 3,
The optical fiber holding part consists of a base having a V groove and a lid,
It has a structure that fixes the lid to the base by moving the clamper with a substantially U-shaped cross section back and forth,
An optical fiber connector characterized by that.

Images