WO2011055877A1

WO2011055877A1 - Field modular optical connector and assembly method thereof

Info

Publication number: WO2011055877A1
Application number: PCT/KR2009/007302
Authority: WO
Inventors: 송재섭; 전상철; 서영배
Original assignee: 일신테크(주)
Priority date: 2009-11-06
Filing date: 2009-12-08
Publication date: 2011-05-12
Also published as: KR20110050335A

Abstract

The present invention relates to a field modular optical connector which facilitates optical fiber connection for workers in the field. More specifically, the characterizing features of the invention include covered optical fibers associated with a ferrule, a ferrule holder made of an elastic material, and a plug inserted into a socket, wherein the field modular process includes the steps of peeling back and cutting off cover portions, connecting the optical fiber ends with a fusion splicer to fuse the ends together, and reinforcing the fusion splicing with a reinforcing sleeve.

Description

Field assembly type optical connector and its assembly method

The present invention relates to a field-assembled optical connector that allows the operator to easily connect the optical fiber in the field.

Recently, an FTTH (Fiber To The Home) system has been proposed that can provide various information including broadcasting and communication by connecting optical cables to general homes, and has been applied to apartments and houses. In the FTTH system, the optical cable is connected to the home, for example, and the end is installed in the form of a connector. In this case, the FTTH worker sets the optical cable several meters longer than the actual length in consideration of the connection between the optical cables and introduces the optical cable into the home. In addition, the worker cuts the optical cable to the required length in the home construction site, assembles the optical connector at its end and connects it to the optical adapter and installs it in the home.

On the other hand, a general optical fiber is composed of a core layer and a cladding layer, which is commonly referred to as a main line or a core line. The main line is formed to have a diameter of approximately 125 μm, and a coating layer is coated with a thickness of approximately 250 μm or 900 μm outside the main line (hereinafter, referred to as a coating main line). The outer surface of the coating layer is coated (hereinafter, referred to as element wire).

A jacket made of, for example, PVC is coated on the outer side of the element wire through a buffer material such as kevlar (aramid yarn) for strengthening tensile strength.

The optical fiber is to be able to transmit and receive the desired signal through the light transmitted through the core layer. Therefore, in the construction of the optical cable, it is necessary to align and accurately arrange the main line of the optical cable in order to minimize the transmission loss of the light.

As described above, the field assembly type optical connector of Korean Patent No. 00608409, the field assembly type optical connector of Korean Patent No. 0724076, and the field assembly type of Korean Patent No. 0669947 to accurately arrange the connection of the optical cable in the field. Various technologies are provided, such as an optical connector, an on-site assembled optical connector of Korean Patent Publication No. 10-2008-0037502, and an on-site assembled optical connector of Korean Publication No. 10-2008-0081789.

Among the related arts provided above, the prior arts except for the field assembly type optical connector of Korean Patent No. 0608409 and the field assembly type optical connector of Korean Patent No. 0724076 are mechanical (mechanical) coupling methods for the ferrule optical fiber and the main assembly. It is to fix the end of the optical fiber.

This conventional mechanical (mechanical) coupling method has a problem that the end of the optical fiber for ferrules and the main optical fiber is separated from the combined portion due to frequent use or frequent shock and temperature changes.

In the field assembly type optical connector of Korean Patent No. 0060848, and the field assembly type optical connector of Korean Patent No. 0724076, the optical fiber is fixed by applying an adhesive to the inner circumferential surface of the boot when connecting another optical fiber connected to the optical fiber installed in the ferrule. It is to let.

The method of connecting the ends of the ferrule optical fiber and the main optical fiber using such a conventional adhesive is not reusable by the applied adhesive, and the operator must hold the optical fiber for a long time until the adhesive solidifies and completely fixes the optical fiber. There is a disadvantage.

In Japanese Patent Laid-Open No. 2002-82257, there is provided an optical connector configured to fuse an optical fiber by a fusion method and to reinforce the fusion portion with a reinforcing sleeve.

In general, when the optical connector is connected to the fusion splicer in the field, and the reinforcement sleeve is installed to reinforce the fusion splicing part, the force applied to the core wire (main line) of the ferrule optical fiber is removed when the fiber is removed from the field. There is a problem that the bonded part with the ferrule falls off, and when only the ferrule and the ferrule holder are fixed by bonding the ferrule optical fiber, the size of the ferrule and the ferrule holder is small, which makes it difficult to hold the coating. There is a problem in that a force (load) is applied, which causes the bonded portion of the ferrule to fall off.

In order to solve this problem, if the end of the ferrule optical fiber is peeled off and supplied, the core wire (main line) of the ferrule optical fiber may be exposed to air for a long time, and the core wire (main line) may be exposed to the outside. This causes workers to be inconvenient and difficult.

Further, the technique described in Japanese Patent Laid-Open No. 2002-82257 shows that when reinforcing the fusion spliced portion with a reinforcing sleeve, neither the main optical fiber nor the reinforcing sleeve is fixed to the body part of the optical connector so that the longitudinal load applied from the main optical fiber Since (force) is directly transmitted to the ferrule optical fiber through the fusion splicing part, a continuous load (fatigue load) is generated between the ferrule and the ferrule optical fiber, resulting in a problem that the adhesive portion is dropped.

The present invention invented to solve the above problems,

First, it is an object to provide a field assembly type optical connector which can be assembled after peeling the coating of the end of the optical fiber combined with the ferrule, the ferrule holder, the elastic member, the fixed socket and the plug in the field.

That is, the field-assembled optical connector accommodates the ferrule, the ferrule holder and the elastic member, and includes a fixing socket assembled to the plug to facilitate gripping during stripping of the end of the ferrule optical fiber, and the ferrule optical fiber is adhesively attached to the ferrule holder. It can be assembled after peeling the coating of the ferrule optical fiber end in the field by reducing the force acting between the ferrule and the ferrule optical fiber when it is fixed first and fixed by the adhesive to the fixing socket secondly when stripping the ferrule optical fiber end. It is an object of the present invention to provide a field assembly optical connector.

Secondly, an object of the present invention is to provide a field assembly type optical connector which can prevent the longitudinal load applied from the main optical fiber from being transmitted to the optical fiber for ferrule.

That is, one side of the fixed socket for accommodating the elastic member to apply elasticity to the ferrule and the ferrule holder and coupled to the plug and one side of the reinforcement sleeve to be installed so that the ferrule is elastically supported so that the main optical fiber is connected to the fixed socket among the components of the optical connector. An object of the present invention is to provide a field-assembled optical connector which can prevent the longitudinal load applied from the main optical fiber from being transmitted to the optical fiber for ferrule.

Field assembly type optical connector of the present invention invented to achieve the above object,

After the ferrule is coated with the ferrule holder, the elastic member, the fixing socket, and the plug, the coating stripping process and the cutting process are performed in the field, and then the fusion splicer is connected to the main optical fiber by the fusion splicer. do.

Alternatively, after the stripping and cutting of the optical fiber in which the ferrule is combined with the ferrule holder, the elastic member, the fixed socket and the plug, the fusion splicer is connected to the main optical fiber by the fusion splicer and the fixed socket coupled to one side of the plug is It is characterized in that it is combined with one end of the reinforcement sleeve.

The ferrule optical fiber is fixed to the fixing socket second with an adhesive,

A protrusion is formed at one side of the fixing socket, and the protrusion is covered with one end of the reinforcing sleeve when the fusion splicing part is reinforced with a reinforcing sleeve, and the fixing socket and the reinforcing sleeve are coupled.

The protrusion is formed with a protrusion on the outer circumferential surface to improve the bonding force with the reinforcing sleeve.

Alternatively, after the stripping and cutting process of the optical fiber in which the ferrule is combined with the ferrule holder, the elastic member, the fixed socket and the plug, the ferrule is fused and connected with the main optical fiber by the fusion splicer, and then the ferrule, the ferrule holder, the elastic member and the fixed socket. The optical fiber combined with the plug is fixed to the fixing socket secondly with an adhesive.

In the assembly method of the field assembly type optical connector of the present invention made as described above, the stripping process of peeling the coating of the ferrule optical fiber and the main optical fiber in combination with the ferrule, the ferrule holder, the elastic member, the fixed socket and the plug (S10). )and; Cutting process (S20) for cutting the end of each stripped optical fiber; A fusion splicing process (S30) for fusion splicing the ends of the cut optical fiber; It characterized in that it comprises a reinforcement sleeve installation process (S40) for heating and installing the reinforcement sleeve to the connection portion of the fusion spliced optical fiber.

Field assembly type optical connector of the present invention made as described above can be stripped of the coating of the end of the optical fiber for ferrules using a stripper in the field, the ferrule, the ferrule holder, the elastic member, the fixing socket and the sleeve are easily coupled to the fusion splicer. The end of the optical fiber and the main optical fiber is fusion-spliced, there is an advantage that the fusion splicing portion can be reinforced with a reinforcing sleeve.

In other words, the ferrule with the optical fiber in which the ferrule, the ferrule holder, the elastic member, and the fixed socket and the sleeve are combined is accommodated in the fixed socket together with the elastic member and installed in the plug. It is easy to peel off. In addition, there is an advantage that the optical fiber for ferrules can be prevented from being separated or broken from the ferrule by the force (tensile force) acting upon coating stripping by fixing the optical fiber to the fixing socket with an adhesive.

In addition, a protrusion is formed in the fixed socket, and one side of the reinforcement sleeve is covered with the protrusion so that the reinforcement sleeve that surrounds and fixes the fixed socket and the ferrule optical fiber is coupled to the force acting in the longitudinal direction of the optical fiber transmitted from the main optical fiber side. It can be prevented from being delivered to the ferrule.

The field-assembled optical connector of the present invention made as described above may assemble the field-assembled optical connector by peeling the end of the optical fiber in the field, connecting the fusion splicer, and then reinforcing the fusion spliced portion with a reinforcing sleeve.

That is, in the prior art, when the process of peeling the end of the ferrule optical fiber in the field, the breakage occurs when the ferrule and the ferrule optical fiber fixed by the adhesive to the ferrule are separated or missing, so that the peeling process was not performed well in the field. The sheath of the end of the ferrule optical fiber had to be peeled off before being cut and supplied. However, when the cover of the end of the optical fiber for ferrule is stripped and supplied, there is a high possibility that the optical fiber is contaminated, and it is easy to be damaged, and there are many difficulties in storage and packaging.

1 is a perspective view of a field assembly type optical connector showing a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of the field assembly optical connector showing a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of the assembled state of the field assembly optical connector showing a preferred embodiment of the present invention.

Figure 4 is a partially separated perspective view of the field assembly optical connector showing a preferred embodiment of the present invention.

5 is a partially separated / assembled perspective view of a field assembly type optical connector showing a preferred embodiment of the present invention.

Figure 6 is a cross-sectional view showing a ferrule and a ferrule holder and a ferrule optical fiber of the field assembly optical connector showing an embodiment of the present invention.

Figure 7 is a partial separation / assembly cross-sectional view of the field assembly optical connector showing an embodiment of the present invention.

Figure 8 is a partial assembly cross-sectional view of the field assembly optical connector showing an embodiment of the present invention.

Figure 9 is a partial assembly cross-sectional view of a field assembly optical connector showing another embodiment of the present invention.

Figure 10 is a perspective view showing that the stripping of the ferrule optical fiber of the field assembly type optical connector showing an embodiment of the present invention is seated on the ferrule optical fiber jig.

11 is a perspective view showing that the main optical fiber of the field-assembled optical connector showing an embodiment of the present invention is seated on the main optical fiber jig to remove the coating.

12 is a cross-sectional view showing that the reinforcing sleeve is installed in the fusion splicing portion of the field-assembled optical connector showing an embodiment of the present invention, (a) is before the reinforcing sleeve is installed in the fusion splicing portion, (b) is a reinforcing sleeve It is shown by the heating means to be contracted by the heating means is installed in the fusion splicing portion and reinforced.

Fig. 13 is a sectional view showing that the reinforcing sleeve of the field assembly type optical connector showing another embodiment of the present invention is installed in the fusion splicing portion.

14 is a step diagram showing the assembly step of the field assembly type optical connector of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a perspective view of a field assembly type optical connector showing an embodiment of the present invention, Figure 2 is an exploded perspective view of a field assembly type optical connector showing an embodiment of the present invention, Figure 3 is a site showing an embodiment of the present invention Sectional view of the assembled optical connector.

As shown in FIGS. 1 to 3, the field assembly type optical connector of the present invention is largely provided with a ferrule 10 which keeps the longitudinal cross-section of the ferrule optical fiber 1 and a ferrule holder 20 accommodating the ferrule 10. And a resilient member 30 installed on one side of the ferrule holder 20 to apply an elastic force to the ferrule 10, a fixed socket 40 for receiving the elastic member 30, and the fixed socket 40. The plug 50 is coupled to one side of the plug 60, the ferrule 10 and the ferrule holder 20, the fixing socket 40 for receiving the elastic member 30 is installed plug 60 and the plug A housing 70 for accommodating 60, a protective cover 80 for protecting the main optical fiber 2 installed in the connector 50, and a connection portion between the ferrule optical fiber 1 and the main optical fiber 2; Consists of a reinforcing sleeve 90 to protect the.

The ferrule 10 has a through-hole formed therein, and the through-hole ferrule optical fiber 1 is inserted into the through-hole and is fixed with an adhesive. In this way, the ferrule optical fiber 1 installed in the ferrule 10 is maintained such that one end surface of the ferrule 10 is exposed, and the other end is exposed in a coated state.

The ferrule holder 20 accommodates one side of the ferrule 10 as shown in FIGS. 4 and 6 to 8 and fixes the ferrule optical fiber 1 with an adhesive. That is, the ferrule optical fiber 1 is fixed to the ferrule holder 20 with an adhesive like the primary adhesive portion A.

The ferrule holder 20 is accommodated in the inner space formed by the through hole 61 of the plug 60 together with the ferrule 10, one end is caught by the jaw formed in the through hole 61, and the other end is fixed. In contact with the elastic member 30 accommodated in the socket (40).

As such, the ferrule holder 20 accommodated in the inner space of the plug 60 and fixed to the fixed socket 40 is elastically supported by the elastic member 30 accommodated in the fixed socket 40.

As shown in FIG. 6, the ferrule optical fiber 1 is exposed in a state of being covered to one side of the ferrule holder 20, and the exposed length L is appropriately 40 to 60 mm.

When the fusion splicer is exposed to the fusion splicer among the exposed length L of 40 to 60 mm, the coating of about 30 to 40 mm is peeled off.

In the opposite direction to the ferrule 10 of the ferrule optical fiber 1 in a state in which the ferrule optical fiber 1 fixed with an adhesive to the through-hole of the ferrule 10 as described above is first bonded to the ferrule holder 20 with an adhesive. When peeling off the coating of the end of the gripping is difficult, and the adhesive strength is weak when the stripping of the end of the ferrule optical fiber 1 fixed by the adhesive to the through-holes of the ferrule 10 occurs.

The elastic member 30 is accommodated in the inside of the fixed socket 40, as shown in Figs. 4, 7 and 8, to apply an elastic force in the longitudinal direction to the ferrule 10, usually using a spring.

The fixing socket 40 has a through-hole 41 is formed as shown in Figures 4 and 5 and 7 to 9 to have an inner space to accommodate the elastic member 30, the outer peripheral surface coupling formed on the plug 60 The first coupling protrusion 42 coupled to the groove 63 and the second coupling protrusion 43 coupled to the coupling groove 52 formed at the connector 50 are formed, and at one side, a protrusion 44 is formed. The protrusions 44 are formed with a plurality of protrusions 45. The plurality of protrusions 45 are formed of grooves and irregularities.

As shown in FIG. 12, the inner space of the fixing socket 40 has a space portion 40 ′ when the elastic member 30 is accommodated. The space portion 40 ′ is used as an avoiding space portion of the ferrule optical fiber 1 when the ferrule 10 moves in the longitudinal direction by the elastic member 30.

The protrusion 44 is coupled to one end of the reinforcement sleeve 90 is installed to reinforce the fusion coupling portion 3, as shown in Figure 12, the projection 45 is to improve the coupling force of the installed reinforcement sleeve 90 do.

That is, one end of the reinforcing sleeve 90 installed to reinforce the fusion coupling part 3 as shown in FIG. 12 (a) surrounds the outside of the protrusion 44, and when heated, the reinforcing sleeve 90 contracts. As shown in FIG. 12B, one end of the protrusion 44 and the reinforcement sleeve 90 is coupled.

As described above, the one side of the reinforcing sleeve 90 and the protrusion 44 of the fixing socket 40 are coupled to each other, so that the main optical fiber 2 is fixed to the fixing socket 40 which is one of the components of the optical connector so that the force in the longitudinal direction is increased. It is possible to prevent the ferrule from being transmitted to the optical fiber 1.

The fixing socket 40 and the ferrule optical fiber 1 made as described above may be bonded or not bonded using an adhesive.

That is, when the adhesive is not used as shown in FIGS. 7 and 8 and as shown in FIG. 9, the secondary adhesive part B may be formed.

7 and 8 show that the ferrule optical fiber 1 is fixed by the primary adhesive portion (A), and FIG. 9 shows that the ferrule optical fiber 1 is fixed by the primary adhesive portion (A) and the secondary adhesive portion (B).

As described above, the fixing socket 40 inserts the elastic member 30 to be received in the inner space formed by the through-hole 41 as shown in FIGS. 4, 5, and 7 so that the ferrule 10 is elastically supported. After inserting the ferrule optical fiber 1 with the 10 and the ferrule holder 20, the first coupling protrusion 42 formed in the fixed socket 40 is inserted into the plug 60 as shown in FIGS. 8 and 9. It is coupled to the coupling groove (63) formed in the plug (60).

Figure 13 shows another embodiment of the present invention, one end of the cover portion (C) and one end of the reinforcing sleeve 90 of the one end of the ferrule optical fiber 1 is fixed to the fixed socket 40 with an adhesive to be coupled It can be shown.

That is, the reinforcement sleeve 90 and the fixed socket 40 are not coupled to each other by not forming the protrusion 44 in the fixed socket 40.

The plug 60 has a through hole 61 formed therein to accommodate the ferrule 10 and the fixed socket 40, and has an inner space, and the coupling protrusion 62 and the fixed socket 40 are coupled to the housing 70. Coupling groove 63 is formed to be fixed.

The plug 60 in which the ferrule 10 and the fixed socket 40 are accommodated as described above is seated in the ferrule optical fiber jig 100 having the seating groove 120 and the cover 110 as shown in FIG. 1) The coating 1a at the end is peeled off.

In the case of using the ferrule optical fiber jig 100, the gripping is easy to peel off, thereby reducing the force acting between the ferrule 10 and the ferrule optical fiber 1 when stripping.

Even when the optical fiber jig 100 for ferrules is not used as shown in FIG. 10, the stripping operation is facilitated by gripping the plug 60 in which the fixed socket 40 is accommodated, which is relatively larger than the ferrule 10. ) And the force acting between the ferrule optical fiber 1 can be reduced. Stripping is stripped with a heating stripper or a general stripper.

Furthermore, when the ferrule optical fiber 1 is fixed to the fixing socket 40 with an adhesive, the stripping process can be performed more stably.

The housing 70 has an inner space formed therein to accommodate the plug 60, and a coupling groove in which the coupling protrusion 62 is coupled is formed in the inner space so as to fix the plug 60 accommodated therein.

The connector 50 is formed with a through hole 51 and the coupling groove 52, the coupling protrusion 43 formed in the fixed socket 40 is coupled to the coupling groove 52 is coupled to the fixed socket 40. .

The reinforcement sleeve 90 is formed as a tube (tube) to be reduced when heated, it may include a reinforcement in the longitudinal direction therein.

The reinforcing rod is usually made of iron wire and prevents the bending of the reinforcing sleeve 90 to prevent the fusion splicing portion 3 of the ferrule optical fiber 1 and the main optical fiber (2).

FIG. 11 illustrates stripping of the coating of the ends of the main optical fiber 2, and the main optical fiber jig 200 includes a seating groove in which one side of the reinforcing sleeve 90 and the main optical fiber 2 is seated, and a cover 210. Formed.

After the reinforcing sleeve 90 and the main optical fiber 2 are seated on the main optical fiber jig 200 formed as described above, the coating of the ends of the main optical fiber 2 is removed.

The field-assembled optical connector of the present invention made as described above is made of the stripping of the ferrule optical fiber 1 and the main optical fiber 2 in the field, the ferrule optical fiber 1 is fixed socket as shown in Figs. It is installed in the 40, the fixed socket 40 is supplied in a state coupled to the plug (60).

The field assembly type optical connector of the present invention is a coating stripping process (S10) for stripping the coating of the ferrule optical fiber (1) and the main optical fiber (2), respectively, installed in the ferrule 10 in the field as shown in FIG. Cutting process (S20) for cutting the end of the stripped optical fiber of the, the fusion splicing process (S30) for fusion-splicing the end of the cut optical fiber with the fusion splicer, and the reinforcing sleeve to the connection portion 3 of the fusion spliced optical fiber After connecting the ends of the ferrule optical fiber 1 and the main optical fiber (2) through the reinforcement sleeve installation process (S40) to install the heating by coupling the connector 50, the protective cover 80 and the housing 70 The field-assembled optical connector will be assembled.

Claims

An optical connector configured to fusion-connect a ferrule optical fiber and a main optical fiber accommodated in a ferrule elastically supported by an elastic member with a fusion splicer and then reinforce the fusion splicing portion with a reinforcing sleeve.

The ferrule 10, the ferrule holder 20, the elastic member 30, the fixing socket 40 and the plug 60, the optical fiber for the ferrule (1) combined in the field coating stripping process and cutting process after fusion Field assembly type optical connector, characterized in that the fusion splicing portion (3) is reinforced by a reinforcing sleeve (90) after being fusion-connected with the main optical fiber (2) by the connector.
An optical connector configured to fusion-connect a ferrule optical fiber and a main optical fiber accommodated in a ferrule elastically supported by an elastic member with a fusion splicer and then reinforce the fusion splicing portion with a reinforcing sleeve.

The ferrule 10 and the ferrule holder 20 and the elastic member 30 for applying elasticity and includes a fixed socket 40 is installed on one side of the plug 60,

One side of the fixed socket 40, the field assembly type optical connector, characterized in that coupled to one end of the reinforcement sleeve (90).
An optical connector configured to fusion-connect a ferrule optical fiber and a main optical fiber accommodated in a ferrule elastically supported by an elastic member with a fusion splicer and then reinforce the fusion splicing portion with a reinforcing sleeve.

It includes a fixed socket 40 for receiving the ferrule 10 and the ferrule holder 20 and the elastic member 30 to apply elasticity and installed on one side of the plug 60,

Field assembly type optical connector, characterized in that coupled to one end of the cover portion (C) and one end of the reinforcing sleeve (90) of the optical fiber for ferrule (1).
The method according to claim 2 or 3,

The ferrule optical fiber (1) is a field assembly type optical connector, characterized in that the fixing socket 40 is fixed to the secondary.
The method of claim 2,

Protruding portion 44 is formed on one side of the fixed socket 40,

The protrusion 44 is a field assembly type optical connector, characterized in that the fixing socket 40 and the reinforcing sleeve (90) is coupled to one end of the reinforcing sleeve (90) when reinforcing the fusion connection to the reinforcing sleeve (90).
The method of claim 5,

Field assembly type optical connector, characterized in that the projection (44) is formed with a projection (45).
An optical connector configured to fusion-connect a ferrule optical fiber and a main optical fiber accommodated in a ferrule elastically supported by an elastic member with a fusion splicer and then reinforce the fusion splicing portion with a reinforcing sleeve.

The ferrule 10 and the ferrule holder 20 and the elastic member 30 for applying elasticity and includes a fixed socket 40 is installed on one side of the plug 60,

The ferrule 10, the ferrule holder 20, the elastic member 30, the fixing socket 40 and the plug 60 and the optical fiber 1 for the ferrule combined with the plug 60 are fixed to the fixing socket 40 by an adhesive. Field assembly type optical connector.
In the assembly method of the field assembly type optical connector,

Stripping the coating of the ferrule optical fiber 1 and the coating of the main optical fiber 2 in which the ferrule 10, the ferrule holder 20, the elastic member 30, the fixed socket 40, and the plug 60 are combined. And stripping process (S10) and;

Cutting process (S20) for cutting the end of each stripped optical fiber;

A fusion splicing process (S30) for fusion splicing the ends of the cut optical fiber;

And a reinforcing sleeve installation process (S40) for heating and installing a reinforcing sleeve to a connection portion of the fusion spliced optical fiber.