JP2003255175A - Component for optical communication and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a component for optical communication which has large tensile strength and high airtightness as a component for optical communication constituted by fixing an optical element or optical fiber to a fixture such as a holder and a ferrule by calking. <P>SOLUTION: The component for optical communication constituted by fixing the optical element or optical fiber 2 to the fixture such as the holder 5 and ferrule 1 by calking has a buffer layer 1a of plastically deformable metal on the surface where the optical element 6 or optical fiber 2 is fixed by calking and is equipped with a diffusion layer 1b formed of only constitution components of the buffer layer 1a and constitution components of the base material of the fixture at the border part between the buffer layer 1a and the base material of the fixture. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical communication component which is a member constituting an optical system used for optical communication and the like, and a manufacturing method thereof.

[0002]

2. Description of the Related Art For optical communication devices, various inspection devices, various optical sensors, laser devices, etc., an optical isolator, an optical fiber, a receptacle, a lens, an optical element or an optical fiber is used as a fixture such as a holder or a ferrule. A large number of optical communication components fixed by crimping are used, and their performances are diverse and require high performance such as tensile strength, airtightness, and solder wettability.

As an example of an optical communication component in which such an optical element or an optical fiber is caulked and fixed to a fixture such as a holder or a ferrule, FIGS. 4A and 4B are shown.
An explanation will be given using the optical fiber with a ferrule shown in. First, the structure shown in FIG.
However, a buffer material is not provided between the ferrule 7 on the side to be crimped and the optical fiber core wire 7 on the side to be crimped, which is composed of two parts, the ferrule 7 and the optical fiber 8. This is a structure in which the fiber core wire 9 is directly caulked.

A metal material which can be plastically deformed and whose shape can be changed by post-processing such as cutting. The inner hole of the ferrule 7 formed or processed into a cylindrical shape is covered with a synthetic resin such as acrylic resin and vinyl chloride resin. After removing 10 beforehand and exposing the optical fiber core wire 9 of quartz glass, the core wire 9 is directly caulked and fixed by applying a compressive force from the outer peripheral side of the ferrule 7 toward the center to deform it.

On the other hand, a proposal has been proposed in which a caulking side is interposed between a ferrule 7 on the side to be caulked and a core wire 9 on the side to be caulked so as to be caulked and fixed.

For example, in the structure shown in FIG.
First, the coating of the tip portion of the optical fiber 13 covered with the coating 15 is removed, and the optical fiber core wire 14 of quartz glass is exposed and inserted into the ferrule 12.

As for the inner hole of the ferrule 12, the core wire 1
4 has a stepped shape including a hole 17 through which the coating 15 is inserted and a hole 18 through which the coating 15 is inserted, and includes a coating crimping portion 16 for crimping the coating 15, and after the optical fiber 13 is inserted, the coating crimping portion 16 is deformed. Thus, the structure is such that it is fixed via the coating 15. (Japanese Patent Laid-Open No. 2000-3049
68)

[0008]

However, in the above-mentioned conventional example, a buffer material is not interposed between the caulking side ferrule and the caulking side optical fiber as shown in FIG. In the case of the structure in which the core wire is directly caulked, the stress at the time of caulking is directly transmitted to the core wire 9, so that the core wire 9 is easily cracked. Further, when the ferrule 7 is made of a hard material, there is a problem that the surface of the core wire 9 is scratched when the core wire 9 is inserted, and the tensile strength is reduced. Furthermore, when the product after caulking the optical fiber is handled, the edge part 11 of the inner hole of the ferrule rear end side comes into contact with the optical fiber core wire 9 and the optical fiber core wire 9 is scratched and broken. was there.

Further, when the surface roughness of the inner hole of the ferrule 7 is rough, there is a drawback that a gap is generated at the interface between the ferrule 7 and the core wire 9 after caulking, and airtightness cannot be secured. Furthermore, the expansion coefficient of the ferrule 7 and the core wire 9,
Since it is necessary to match the expansion coefficient of the ferrule 7 with the counterpart component fixed to the optical communication device or various inspection devices to prevent the optical fiber 8 from coming off and coming off from the optical communication device, the material of the ferrule 7 is It had the drawback of being limited.

On the other hand, when caulking and fixing by interposing a cushioning material between the caulking side ferrule and the caulking side optical fiber core wire as shown in FIG.
Since the material of 5 is a synthetic resin such as acrylic resin or vinyl chloride resin, due to the outgas generated from the coating 15 when incorporated into optical communication equipment or various inspection devices,
There was a problem that the peripheral parts were adversely affected. Also,
In general, the coating 15 is apt to deteriorate due to absorption of moisture under high temperature and high humidity conditions, and expands and contracts due to temperature change, so that there is a problem in reliability of parts such as reduction in tensile strength and airtightness. .

Further, there is a drawback that the holding force after caulking changes due to the variation in the wall thickness of the coating 15, and the tensile strength is not stable. Furthermore, when incorporating into optical communication equipment or various inspection equipment, soldering or YAG is mainly used.
Since it is fixed to the mating part by welding, the ferrule 12
And the coating 15 is loaded with high temperature heat, resulting in coating 15
However, the optical fiber 13 is melted and the optical fiber 13 comes off.

[0012]

The optical communication component of the present invention has a plastically deformable metal buffer layer on the surface on which the optical element or the optical fiber is caulked and fixed, and the buffer layer and the fixing. It is characterized in that a diffusion layer composed of only the constituent components of the buffer layer and the constituent material of the base material of the fixing tool is provided at the boundary portion with the base material of the fitting.

According to this structure, since the buffer layer is formed of a plastically deformable metal, when incorporated into an optical communication device or various inspection devices, outgas does not adversely affect peripheral components. In addition, it is possible to suppress the expansion and contraction of the buffer layer due to the deterioration of the buffer layer due to moisture and the temperature change,
Performance such as tensile strength and airtightness is improved, and reliability can be secured. Further, when the optical fiber is incorporated into an optical communication device or various inspection devices, the buffer layer does not melt even when soldering or YAG welding is performed, so that the optical fiber does not come off. Furthermore, since the buffer layer and the base material are firmly bonded by the diffusion layer, the buffer layer does not peel off even when deformed by applying a caulking force to the ferrule, so stable caulking is possible. Become.

The base material of the fixture is Kovar, copper,
The buffer layer is made of at least one of stainless steel, iron / nickel alloy, iron / nickel / chromium alloy, iron / chromium alloy, aluminum, and magnesium.
It is characterized by being made of at least one of copper, tin, lead, zinc, nickel, chromium, kovar, stainless steel, aluminum, and magnesium. According to such a configuration, the expansion material can be freely matched in expansion coefficient with the base material of the fixture and the mating material when incorporated into the optical communication device or various inspection devices, and the optical communication device can be securely fixed. And various inspection devices can be prevented from falling off. Also,
By using the above-mentioned cushioning material, it becomes possible to prevent scratches that occur when the optical fiber is inserted into the fixture, and as a result, the tensile strength of the optical fiber is stabilized and the light due to handling after caulking is performed. Fiber breaks are also eliminated. Further, since the fixture and the optical fiber core wire are crimped via the cushioning material during crimping, stress during crimping is relieved, aggression to the optical fiber is reduced, and cracking can be prevented. Furthermore, by using the above-mentioned cushioning material, even if the surface roughness of the cushioning layer is rough, the surface of the cushioning layer can be plastically deformed during caulking and the gap between the fixture and the optical fiber interface can be filled. It is possible to secure the sex.

Furthermore, the method of manufacturing an optical communication component of the present invention comprises:
After the metal foil or metal thin plate to be the buffer layer is placed on the surface of the base material of the fixture, and the metal foil or metal thin plate and the base material are pressure-welded to each other to form the buffer layer fixed by diffusion bonding. By deforming the fixture, the optical element or the optical fiber is caulked and fixed to the fixture through the buffer layer.

According to this structure, since the buffer layer and the base material are firmly bonded by the diffusion layer, the buffer layer is not peeled off even when the ferrule is deformed by applying a caulking force, so that the ferrule is stable. The caulking is possible and the optical fiber can be prevented from falling off.

Further, in the method for manufacturing an optical communication component of the present invention, a metal foil or a metal thin plate serving as a buffer layer is placed on the surface of a base material of a plate-shaped fixture, and the metal foil or metal thin plate and the base material By pressing, the step of forming a buffer layer fixed by diffusion bonding, the step of forming a plate-shaped fixture having this buffer layer formed into a cylindrical shape, and joining a seam, and via the buffer layer And a step of caulking and fixing the optical element or the optical fiber to the fixing tool.

According to this structure, since the pressure-bonding step of forming the buffer layer by using the base material of the plate-shaped fixture is performed, the thickness of the base material and the thickness of the buffer layer can be freely changed. Therefore, the caulking force can be set according to the wall thickness. Also, by performing the pressure contact step, the bond between the fixing tool and the buffer layer is strengthened, and the buffer layer does not peel off even when the fixing tool is deformed by applying caulking force, so stable caulking is possible. Becomes

Further, after the buffer layer is formed, the fixture is further drawn.

According to this structure, the base material of the fixture and the buffer layer can be more strongly pressure-bonded to each other, and the bonding force between them can be increased. In addition, since the uniformity of the thickness of the buffer layer can be increased, the holding power after caulking becomes stable. Furthermore, it is possible to easily obtain a communication component holding an optical element having a small diameter or an optical fiber.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an optical fiber with a ferrule according to the present invention will be described below with reference to FIGS.
An explanation will be given using (b).

In FIG. 1 (a), the optical fiber 2 is inserted into the ferrule 1 and deformed by applying a compressive force from the outer peripheral side of the ferrule 1 toward the center, and the optical fiber core wire 4 is inserted through the buffer layer 1a. 1 shows a component for optical communication of the present invention in which is swaged and fixed.

First, the structure of the optical fiber 2 used will be described. The optical fiber 2 used here is a single mode (S
M), can be used regardless of the multi-mode (MM),
PMF (POLARIZATION MAINTENA
An optical fiber such as NCE FIBER) that maintains the polarization polarity can be used without any trouble.

The structure is composed of a silica glass core wire 4 and a synthetic resin material covering 3 for covering the core wire,
The coating 3 is removed by a length that allows it to be inserted into an inner hole of a ferrule 1 described later. The coating 3 adheres to the core wire 1 1
It is composed of a secondary coating 3a and a secondary coating 3b arranged outside the primary coating (in the present embodiment, the secondary coating 3a is composed of two layers.
(Although it may be a layer and is not limited thereto), at least a portion where the ferrule 1 is caulked is used after removing both the primary coating 3a and the secondary coating 3b. That is, as shown in FIG. 1B, it is not always necessary to remove the coating 3 except for the portion where the ferrule 1 is crimped, and the bending strength of the optical fiber 2 at the rear end side of the ferrule 1 is secured depending on the intended use. In order to do so, the coating 3 may be inserted into the ferrule 1 and used. In this case, at least the portion of the optical fiber core wire 4 where the quartz glass is exposed is caulked, so that it is affected by heat when incorporated into optical communication equipment or various inspection devices,
Even if the coating 3 expands and contracts, the tensile strength does not decrease. Further, since the coating 3 is disposed on the rear end side of the position where the ferrule 1 is swaged, there is no fear that the outgas of the coating 3 leaks from the tip of the ferrule 1.

Next, the ferrule 1 used will be described. A buffer layer 1a is provided on the surface of the base material of the ferrule 1 on the side where the optical fiber core wire 4 is fixed by pressure contact described later, and the buffer layer 1a is provided at the boundary between the buffer layer 1a and the base material of the ferrule 1. A ferrule 1 provided with a diffusion layer 1b consisting only of the components and the components of the base material of the ferrule 1 is used. As described above, by providing the diffusion layer 3 and joining the base material and the buffer layer 2 more firmly, stable caulking can be performed without peeling during caulking.

As the material of the base material of the ferrule 1, it is desirable to use stainless steel having a small expansion coefficient, but other metals or non-ferrous metals can also be used. For example, metals include kovar, iron / nickel alloys, iron / nickel / chromium alloys, iron / chrome alloys, etc., and non-ferrous metals include copper, aluminum, magnesium, etc.

These materials are used for the purpose of preventing them from falling out of the optical equipment by adjusting the thermal expansion coefficient of the material of the other party when incorporating into the above-mentioned equipment for optical communication. In addition, the ferrule 1 in the present embodiment is designed to be weldable when directly fixed to the ferrule 1 by YAG welding when incorporated into an optical communication device. There is. On the other hand, in the case where the ferrule 1 is fixed with solder when being incorporated in an optical communication device or the like, a layer formed by pressure welding is also used on the outer peripheral side of the ferrule 1 in the same manner as the buffer layer 1a (in this case, soldering is not a buffer layer but soldering). It becomes possible to secure solder wettability by forming a base layer) for securing the solder wettability.

Further, the material used for the buffer layer 1a of the ferrule 1 is preferably gold. By doing so, even when the optical fiber core wire 4 is inserted into the inner hole of the ferrule 1,
Since the core portion is not damaged and the stress on the core wire 4 at the time of caulking can be reduced, more stable tensile strength can be secured. Of course, silver, copper, tin,
Lead, zinc, nickel, chrome, kovar, stainless steel,
It is possible to use buffer materials made of plastically deformable metals such as aluminum and magnesium without any problems. Various combinations can be used in consideration of caulking force adjustment by combining with ferrule 1 base material and material cost. Can be used in.

With respect to the thickness of the buffer layer 1a, the preferable range of the thickness of the buffer layer 1a varies depending on the material and shape of the caulking side and the material of the buffer layer 1a, but generally 0.001 to 0. A thickness of 0.5 mm is preferred. When the thickness is 0.001 mm or less, the thickness is too thin to serve as a buffer layer, and when the thickness is 0.5 mm or more, the thickness is too large and the ferrule 1 is not thermally loaded. This is because the amount of expansion and contraction when it is applied becomes large and the tensile strength of the optical fiber becomes unstable.

Further, the inner hole diameter of the ferrule 1 is 0.01 to 0.2 from the diameter of the optical fiber core wire 4.
A diameter larger by mm is desirable. If it is smaller than 0.01 mm, it becomes very difficult to insert the optical fiber core wire 4, and the workability deteriorates. On the other hand, if it is larger than 0.2 mm, even if the ferrule 1 is caulked, a gap is opened at the interface between the buffer layer 1a and the optical fiber core wire 4, the tensile strength becomes low, and the airtight characteristic also deteriorates. is there.

The optical fiber with a ferrule can be implemented with the above-mentioned structure. However, not only the optical fiber described above as the optical communication component of the present invention, but also a lens, a polarizer, an analyzer,
Faraday rotator, optical rotator, reflecting mirror, semitransparent reflecting mirror, beam splitter, filter, prism, diffraction grating, calcite, rutile, birefringent crystal such as LN crystal, 1 / 2λ wavelength plate, 1 / 4λ wavelength plate, It is possible to apply all kinds of members constituting an optical system such as a mirror, and a typical example thereof is a lens holder as shown in FIG. 1 (c).

The optical element 6 shown here is an optical element such as a polarizer whose outer shape is processed into a circular shape and metal particles are dispersed in glass. On the other hand, the holder 5 is the ferrule 1 described above.
Similarly, a cylindrical shape is cut into a desired shape, and a compressive force is applied from the outer peripheral side of the holder 5 toward the center to deform the holder 5, thereby forming an optical path through the buffer layer 5a and the diffusion layer 5b. The element 6 is caulked and fixed.

Although there are various shapes of parts on the side to be crimped and the side to be crimped, such as the above-mentioned optical fiber with a ferrule or a lens holder, a method of processing a fixture such as the ferrule 1 or the holder 5 will be described later. By using a drawing process, various shapes can be formed and the process can be performed with high precision, so that it can be applied to precision optical components such as various optical elements and optical fibers.

Next, a method for manufacturing the optical fiber with a ferrule will be described with reference to FIGS. 2 (a) to 2 (d).

First, as shown in FIG. 2 (a), a metal foil or a metal thin plate to be the buffer layer 1a is placed on the surface of the base material of the plate-shaped ferrule 1, and the metal foil or metal thin plate and the ferrule 1 are placed. The base material of the ferrule 1 is pressed into contact with the base material while being rolled to form a diffusion layer 1b by diffusion bonding, and the buffer layer 1a is fixed to the base material of the ferrule 1.

At this time, the thicknesses of the base material of the ferrule 1 and the buffer layer 1a can be freely set by changing the thickness of the base material of the ferrule 1 and the metal foil or the metal thin plate, and the applied pressure. Moreover, since the thickness is stable, the change in the holding force after caulking due to the variation of the buffer layer 1a in the past is eliminated, and the tensile strength becomes stable. Moreover, since the thickness of the buffer layer 1a can be freely set, the stress on the core wire 4 of the optical fiber can be adjusted freely, and cracks in the optical fiber core wire 4 can be prevented.

Further, since the base material of the ferrule 1 and the buffer layer 1a are brought into pressure contact with each other with a high pressure, it is possible to perform strong joining, and it is possible to perform stable caulking without peeling during caulking. Here, it is desirable that the step of pressure contact is performed at a high temperature. By performing at high temperature, diffusion of the base material and the buffer layer 1a is promoted, the base material and the buffer layer 1a can be easily bonded, and a stronger diffusion layer 1b can be obtained.

A suitable range of the pressure for this pressure contact varies depending on the material and the above-mentioned thickness, but generally, the pressure is such that the wall thickness after the pressure is applied is 80% or less of the wall thickness before the pressure is applied. It is desirable to apply. By doing so, more reliable joining becomes possible.

Next, as shown in FIG. 2B, the ferrule 1 is formed into a cylindrical shape, and the seam is welded by TIG welding or carbon dioxide laser welding (CO ₂ ) welding to form the cylindrical ferrule 1. Since the outer diameter of the cylinder at this time is in a state before being drawn, which will be described later, the outer diameter is larger than that of the final product.

Further, a drawing process as shown in FIG. 2 (c) is performed. The cylindrical ferrule 1 is passed through the die 19 and pulled out until the outer diameter φD reaches a prescribed size. Here, it is possible to freely set the outer diameter by changing the size of the die 19. In addition, since it is formed by drawing and a highly accurate shape can be stably produced, it is optimal for parts that require high accuracy such as optical parts.

After the drawing process such as the drawing process described above, FIG.
The ferrule 1 is obtained by cutting to a prescribed length h by cutting (cutting) as shown in (d). Further, the ferrule 1 is completed by cutting a part.

Next, a method for assembling the optical communication component of the present invention will be described with reference to FIGS. 3 (a) to 3 (c).

The optical fiber 2 is inserted into the inner hole of the ferrule 1, and a compressive force is applied from the outer peripheral side of the ferrule 1 toward the center to deform and crimp. There is no problem in the caulking direction either in the circumferential direction of the ferrule 1 as shown in FIG. 3 (a) or in the axial direction as shown in FIG. 3 (b). The caulking position should be one or more places in the circumferential direction. In the case of the ferrule 1 in the axial direction, two or more places are provided.

Further, as shown in FIG. 3 (c), after inserting the optical fiber 2 into the ferrule 1 having a tapered tip, the tip of the ferrule 1 is received by a tapered jig, and the rear end side of the ferrule 1 is received. There is no problem in the method of crimping the optical fiber 2 by applying a load from On the other hand, the caulking force has a preferable range depending on the above-mentioned materials, but is usually 1 to 200.
Caulking with force in the range of kgf. By doing so, it becomes possible to uniformly crimp the entire circumference of the optical fiber 2.

[0045]

EXAMPLES Here, an experiment was conducted by the following method.

As an example of the present invention, the optical communication component shown in FIG. 1A and the conventional optical communication component shown in FIG. The tensile strength was measured.

In both the embodiment of the present invention and the conventional example, the outer diameter of the ferrule was 1.00 mm, the inner diameter was 0.15 mm, and stainless steel SUS304 was used as the base material. Further, gold was pressure-welded as the buffer layer in the examples of the present invention.

As the optical fiber, a single mode fiber was used for both samples. Also, there is only one caulking position,
The caulking direction was the circumferential direction of the ferrule and the caulking was fixed.

Table 1 shows the evaluation results of the above samples.

[0050]

[Table 1]

As shown in Table 1, the maximum tensile strength of conventional optical communication parts is 0.23 kgf, and the average value is 0.14 k.
It was gf, but the maximum value of the product of the present invention was 0.65 kg
f, the minimum value was 0.40 kgf, and the average value was 0.52 kgf, and the minimum value of the product of the present invention exceeded the maximum value of the conventional product. From the above, it was confirmed that the tensile strength was secured as compared with the conventional product and more stable caulking and fixing were possible.

[0052]

As described above, according to the present invention, a plastically deformable metal buffer layer is provided on the surface on which the optical element or the optical fiber is caulked and fixed, and the buffer layer and the base material of the fixture are formed. By providing a diffusion layer consisting of only the constituent components of the buffer layer and the constituent material of the base material of the fixture at the boundary, when incorporated into optical communication equipment or various inspection devices, it is possible to prevent peripheral components from being outgassed. There is no adverse effect.
Further, deterioration of the buffer layer due to moisture and expansion / contraction of the buffer layer due to temperature change can be suppressed, and performance such as tensile strength and airtightness can be improved and reliability can be secured.

Further, even when soldering or YAG welding is performed when the optical fiber is incorporated into an optical communication device or various inspection devices, the buffer layer is not melted and the optical fiber is not pulled out. Furthermore, since the buffer layer and the base material are firmly bonded by the diffusion layer, the buffer layer does not peel even when deformed by applying caulking force to the ferrule,
Stable crimping is possible.

The base material of the fixing device is Kovar, copper,
The buffer layer is made of at least one of stainless steel, iron / nickel alloy, iron / nickel / chromium alloy, iron / chromium alloy, aluminum, and magnesium.
Since it is made of at least one of copper, tin, lead, zinc, nickel, chromium, kovar, stainless steel, aluminum, and magnesium, it serves as a base material for the above fixture and a mating material when it is incorporated into optical communication equipment or various inspection devices. The expansion coefficient of can be freely adjusted and can be securely fixed, so that it can be prevented from falling off from the optical communication device and various inspection devices.

Further, by using the above-mentioned cushioning material, it becomes possible to prevent scratches that occur when the optical fiber is inserted into the fixture, and as a result, the tensile strength of the optical fiber is stabilized and the caulking is performed. The breakage of the optical fiber due to the subsequent handling is also eliminated. Also, when crimping,
Since the fixture and the optical fiber core wire are crimped via the cushioning material, stress at the time of crimping is relieved, aggression to the optical fiber is reduced, and cracks can be prevented from occurring. Furthermore, by using the above-mentioned cushioning material, even if the surface roughness of the cushioning layer is rough, the surface of the cushioning layer can be plastically deformed during caulking and the gap between the fixture and the optical fiber interface can be filled. It is possible to secure the sex.

Further, a metal foil or a metal thin plate serving as a buffer layer was placed on the surface of the base material of the fixture, and the metal foil or the metal thin plate and the base material were pressed to be fixed by diffusion bonding. After forming the buffer layer, by deforming the fixture, by caulking and fixing the optical element or the optical fiber to the fixture through the buffer layer, the buffer layer and the base material are firmly bonded, Even if the ferrule is deformed by applying a caulking force, the buffer layer does not peel off, so that stable caulking is possible and the optical fiber can be prevented from falling off.

Furthermore, a metal foil or a metal thin plate serving as a buffer layer is placed on the surface of the base material of the plate-shaped fixture, and the metal foil or metal thin plate and the base material are pressure-welded to each other by diffusion bonding. A step of forming a fixed buffer layer, a step of forming a plate-shaped fixture having the buffer layer formed into a cylindrical shape, and joining a seam, and an optical element or an optical element to the fixture via the buffer layer. Since the thickness of the base material and the thickness of the buffer layer can be freely changed by including the step of caulking and fixing the fiber, the caulking force can be set according to the thickness.

Further, by performing the press-contacting process, the joint between the fixing tool and the buffer layer is strengthened, and the buffer layer is not peeled off even when the fixing tool is deformed by applying a caulking force, which is stable. Caulking is possible.

Furthermore, after forming the above-mentioned buffer layer, by drawing the fixing tool further, the base material of the fixing tool and the buffer layer can be more strongly pressure-bonded to each other, and the joining force between them can be increased. it can. In addition, since the uniformity of the thickness of the buffer layer can be increased, the holding power after caulking becomes stable. Furthermore, it is possible to easily obtain a communication component holding an optical element having a small diameter or an optical fiber.

[Brief description of drawings]

1A to 1C are cross-sectional views showing various embodiments of an optical communication component of the present invention.

2 (a) to 2 (d) are views showing manufacturing steps of the optical communication component of the present invention.

3 (a) to 3 (c) are views showing a method for manufacturing an optical communication component of the present invention.

4A and 4B are cross-sectional views of a conventional optical communication component.

[Explanation of symbols]

1: Ferrule 1a: buffer layer 1b: diffusion layer 2: Optical fiber 3: Cover 3a: Primary coating 3b: Secondary coating 4: Optical fiber core wire 5: Holder 5a: buffer layer 5b: Diffusion layer 6: Optical element 7: Ferrule 8: Optical fiber 9: Optical fiber core wire 10: Cover 11: Edge part 12: Ferrule 13: Optical fiber 14: Optical fiber core wire 15: Cover 16: Cover caulking part 17: Core wire insertion hole 18: Cover insertion hole 19: Dice φD: outer diameter h: height

Claims (5)

[Claims] 1. A component for optical communication in which an optical element or an optical fiber is caulked and fixed to a fixture such as a holder or a ferrule, wherein the fixture is plastic on the surface on which the optical element or the optical fiber is caulked and fixed. In addition to having a deformable metal buffer layer, at the boundary between the buffer layer and the base material of the fixture, a diffusion layer consisting only of the constituent components of the buffer layer and the base material of the fixture was provided. Optical communication parts characterized by the following. 2. The base material of the fixture comprises at least one of Kovar, copper, stainless steel, iron / nickel alloy, iron / nickel / chromium alloy, iron / chromium alloy, aluminum and magnesium, and the buffer layer. , Gold, silver, copper,
The optical communication component according to claim 1, which is made of at least one of tin, lead, zinc, nickel, chromium, kovar, stainless steel, aluminum, and magnesium. 3. A component for optical communication in which an optical element or an optical fiber is caulked and fixed to a fixture such as a holder or a ferrule, and a metal foil or a metal thin plate serving as a buffer layer is placed on the surface of a base material of the fixture. Then, the metal foil or thin metal plate and the base material are brought into pressure contact with each other to form a buffer layer fixed by diffusion bonding, and then the fixture is deformed so that an optical element or an optical element is passed through the buffer layer. A method for manufacturing an optical communication component, characterized in that a fiber is caulked and fixed to the fixture. 4. An optical communication component comprising an optical element or an optical fiber caulked and fixed to a fixture such as a holder or a ferrule, and a metal foil or a metal thin plate serving as a buffer layer on the base material surface of the plate-like fixture. Step of forming a buffer layer fixed by diffusion bonding by placing the metal foil or metal thin plate and the base material under pressure, and shaping the plate-shaped fixture having the buffer layer into a cylindrical shape The process of joining the seams,
And a method for manufacturing an optical communication component, comprising a step of caulking and fixing an optical element or an optical fiber to the fixture via the buffer layer. 5. The method for manufacturing an optical communication component according to claim 3, wherein the fixture is further drawn after the buffer layer is formed.