JP3161656B2 - Manufacturing method of optical fiber array - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a high-precision positioning can optical fiber array which is arranged in the connection position fixing connected to a corresponding plurality of optical fibers.

[0002]

2. Description of the Related Art Optical fiber communication using optical signals for information transmission was initially used for long-distance relay sections, taking advantage of its large capacity and long transmission distance. Cost reduction of cables and advanced functions and IS for end users
The introduction of DN has begun to be introduced in various fields such as private communication and public communication networks. For the connection between the optical fiber cores, the fusion splicing (individual Splicin
g) was used to reduce the connection loss and enhance the reliability such as weather resistance. However, as optical fibers are used for private and public communications, optical connectors that can be easily removed and replaced are used. Became. The following conditions are generally required for an optical fiber connector.

[0003] Low-loss connection is possible.

[0004] Small and high-density mounting is possible, including the outer shape.

[0005] Easy attachment / detachment operation and good connection workability.

[0006] The connection portion has high mechanical strength and high reliability against environmental changes.

[0007] The price falls within an appropriate range.

Various types of optical connectors have been proposed and put into practical use.
Single mode optical fiber (SM) with a fine core of μmφ
In particular, since positioning accuracy is required, only a few types are commercially available. Typical current optical connectors include a single-core FC type using a metal housing for the single-core type,
There is an SC type that can be removed with a single touch push. These FC-type and SC-type connectors are usually used as standard connectors for measuring instruments, and have very high reliability and low connection loss with respect to accuracy and detachment.

[0009]

However, in order to cope with a large number of attachment / detachment fatigues, a ferrule (optical fiber supporting portion) and a sleeve (tough portion of the ferrule) of the optical fiber fixing portion are required.
Zirconia, high tensile stainless steel is used,
Since high-precision processing is necessary for such a difficult-to-work material, there has been a problem that the unit price is high, including drilling and polishing.

[0010] In addition, an optical connector of a multi-core batch connection type has M
There is a T-type, which uses a structure that does not use a ferrule as in the single-core connector described above. Therefore, the price is lower than that of the FC type connector and the SC type connector.

However, in the MT type connector, the optical fiber core is inserted into the optical fiber connection hole along the V-shaped groove formed by molding the plastic, and then the gap between the optical fiber hole and the optical fiber core wire is made of a thermosetting resin. After filling and curing,
A method of polishing the tip surface is used.

In this method, the precision of the optical fiber fixing position is determined by precision transfer molding of plastic or the like, so that transfer molding is difficult. In addition, since the core is inserted later, it is essentially compared with the optical fiber core. It is necessary to increase the diameter of the optical fiber insertion hole, and there is a problem that the optical fiber core cannot be precisely butted even if the hole position is accurate.

A technique of arranging an optical fiber core wire in a V-groove of an external outer mold, pouring a resin and curing the resin (Japanese Patent Laid-Open No. 1-30)
No. 0207) is also disclosed, but since the accuracy is maintained by V-grooves at both ends of the mold, there is an essential problem that the bare optical fiber becomes an interface with the cured resin and the strength becomes poor. I was Further, there is a problem in that the pressure at the time of pouring the resin causes the optical fiber holding portion to receive an uneven pressure, and finally the optical fiber fixing position is disturbed.

Further, since the resin used has a large thermal expansion coefficient, the fatal problem as an optical connector, in which connection loss fluctuates in an environmental test such as a heat cycle, cannot be overcome.

FIG. 11 is a perspective view showing a schematic structure of a conventional optical fiber array.
Reference numeral 113 denotes a guide pin, 114 denotes an optical fiber core, 115 denotes a bare core, and 116 denotes an optical fiber tape.

FIG. 12 is a diagram for explaining a problem of the conventional optical fiber array shown in FIG.
Is a lower outer frame, 122 is a silicon (Si) V-groove frame, 124 is an optical fiber core wire, 126 is an upper outer frame, 127 is a dimensional deviation portion (model) due to resin injection, and 128 is an optical fiber tape portion.

FIG. 13 is a sectional view showing a conventional completed optical fiber array.
32 is an optical fiber tape portion, and 133 is an optical fiber bare core wire portion.

In the conventional optical fiber array, FIG.
13 and the strength of the optical fiber bare core 133 shown in FIG.

FIG. 14 shows a model of the optical component connection fixing process. In FIG. 14, 141 is an optical fiber array, 142 is a connected optical component, 143 is a photodetector,
44 is an extended optical fiber tape section, 145 is a light source, 146
Denotes an adhesive, 147 denotes a six-axis fine actuator, 148 denotes a controller, and 149 denotes a mounting table. In order to connect and align an optical fiber core of about 10 μmφ to an optical component, it is necessary to control the precision actuator 27 with submicron accuracy.

However, when a normal room temperature curing type adhesive 146 shown in FIG. 14 is used, the alignment time is limited by the curing time of the adhesive. Workability is poor because the precision actuator cannot be moved.

When a thermosetting adhesive is used, heat is applied to the whole or a part of the process system, which affects the actuator with a submicron accuracy, resulting in a misaligned position. For this purpose, an ultraviolet light (UV) adhesive is used which does not solidify at room temperature and hardens rapidly only with ultraviolet light at room temperature.

However, in the conventional optical fiber array,
Since the optical fiber array 141 shown in FIG. 14 does not transmit ultraviolet light, it does not transmit UV light at the center, and it was not possible to obtain good adhesive curing.

A method of processing and manufacturing the optical fiber array 141 using glass or quartz material that transmits UV light is currently used. However, processing of a solid material (precise V-groove processing, etc.) is required, and production of individual parts is required. Therefore, there is a problem that parts cost is high and yield is low.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a low-cost optical component.
Material that transmits light when connecting to the main part of the connector
Utilize UV adhesive on desired optical components without heating
It is an object of the present invention to provide a method of manufacturing an optical fiber array which can be fixed by using the same.

[0025]

The above and other objects and novel features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

[0027]

To achieve the above object, the present invention provides a method for manufacturing an optical fiber array in which a plurality of optical fibers are arranged and fixed at predetermined positions, comprising:
Place the fiber array jig in the outer frame that is transparent to the line,
Placing the plurality of optical fibers on the fiber array jig
And the step of disposing the plurality of optical fibers.
A UV curable adhesive is dropped on the fiber array jig,
The dropped ultraviolet curing adhesive is solidified in the
Solidifying and arranging the optical fibers;
Tool is separated from the portion where the plurality of optical fibers are solidified,
A step of moving to the lower surface of the resin-filled portion;
Fill with a filler that is hardened by external light,
Solidifying, and the fiber array jig and the outer frame
Removing step .

[0028] In a preferred embodiment of the present invention, the outer
The filler filled in the frame contains quartz beads.

In a more preferred embodiment of the present invention ,
The quartz beads consist of large quartz beads and small quartz beads.
Characterized in that it is a mixture with

[0030]

[0031]

[0032]

[0033]

According to the above-mentioned means, a plurality of optical fibers are fiber-coupled.
After being placed on the iva array jig, the plurality of optical fibers are
UV curing adhesive on the arranged fiber array jig
And the ultraviolet-curing adhesive dropped with ultraviolet light is solidified.
Solidifying and arranging the plurality of optical fibers.
The fiber array jig is used to solidify the plurality of optical fibers.
Away from the part, move it to the bottom of the resin filling part,
Filling the outer frame with a filler that is cured by ultraviolet rays,
It is cured by irradiating ultraviolet rays.
Since the tool and the outer frame are removed, the positional accuracy of the optical fiber core wire can be increased. Also, the aforementioned hand
According to the step, the fiber alignment jig is embedded in the filler
Optical fiber arrays are cheaper than other types of optical fiber arrays.
An iva array can be manufactured. That is, the fiber distribution
Optical fiber of the type in which the row jig is embedded in the filler
In the array, a fiber array jig is used for each optical fiber array.
Is required, so the cost is reduced by the fiber array jig.
Optical fiber array manufactured by the present invention.
In b, it is necessary to embed the fiber array jig in the filler
Because there is no, the cost can be reduced accordingly.

Further, since the photo-curing process is used without applying a processing temperature, it is possible to prevent distortion due to temperature during resin solidification.

Further, since the positioning is performed only at the V-groove at one end, the mechanical strength on the opposite side of the connecting portion is also excellent.

Further, since the main member is made of a material having a low expansion coefficient, it is possible to reduce a connection loss increasing phenomenon at a high temperature such as a heat cycle.

The most important point is that the optical fiber array itself has the ability to transmit ultraviolet light in the post-process after the production of the optical fiber array, that is, when the optical fiber array is connected and fixed to the optical component, The UV curing resin bonding process actually used can be used as it is.

[0038]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In all the drawings for describing the embodiments, components having the same function are denoted by the same reference numerals, and their repeated description will be omitted.

(Embodiment 1) FIG. 1 is a perspective view showing a schematic configuration of an optical fiber array according to Embodiment 1 of the present invention.
Reference numeral 11 denotes a constituent member of the optical fiber array, which is made of a high-impact polymer material that transmits ultraviolet light or a high-molecular composite material containing quartz beads. With this configuration, when the optical fiber array is fixedly connected to another optical component, for example, a waveguide (optical path) or the like, an ultraviolet curable resin can be used as a fixing adhesive.

Reference numeral 12 denotes an optical fiber tape, 13 denotes an optical fiber tape bare core, 14 denotes a guide pin hole, and 15 denotes an optical fiber mounting boot. Although not shown, the optical fiber tape bare core portion 13 is coated with a primary polymer. In this regard, the optical fiber array according to the present invention comprises:
Excellent alignment workability using UV adhesive.

The guide pin hole 14 has an advantage that, if a corresponding guide hole is formed in the connected component in advance, the guide pin hole 14 functions as a coarse adjustment guide, and the coarse adjustment mechanism of the fine adjustment actuator can be omitted. This makes it possible to significantly reduce the cost of the adjusting machine in the adjusting device with submicron accuracy.

Further, since the constituent member 11 of the optical fiber array uses a photocurable member having a low expansion coefficient, the strain stress in the thermosetting process caused by the curing using the conventional thermosetting resin shown in FIG. Is not concentrated on the bare optical fiber portion, so that the dimensional accuracy of the arranged optical fiber array is maintained correctly (see FIG. 2).

FIG. 2 shows a thermosetting curing process. In FIG. 2, 21 is a solidified resin, 22 is a bare core portion embedded in the center of the resin, 23 is an uncured portion of the resin, 24 is a heat flow direction, and 25 is a bare core portion due to uneven curing. 22 is a stress generated by curing shrinkage of the resin. This stress 25 leads to a misalignment of the optical fiber.

The block member used as the constituent member of the optical fiber array according to the first embodiment is a mixture of a photocurable member and a composite member having a low coefficient of expansion that transmits light. Apparently, the expansion coefficient is in the middle between the two materials, which solves the dimensional temperature dependence, which is a problem when a resin material is generally applied to precision molding.

Furthermore, since the members having different particle size distributions are used for the composite member having the light-transmitting and low expansion coefficient, the filling rate of the composite member can be increased to the limit, and the thermal dimensional stability of the optical fiber array can be improved. It was possible to improve.

(Embodiment 2) FIG. 3 is a perspective view showing a schematic configuration of an optical fiber array according to Embodiment 2 of the present invention. Reference numeral 13A denotes a V-groove provided in a buried type fiber array jig 32. Optical fiber tape bare core held by
Reference numeral 1 denotes a cured UV resin product (composition of an optical fiber array block main body) after curing, and reference numeral 32 denotes an embedded fiber array jig. The other portion is cut except for the optical fiber tape bare core portion 13A.

FIGS. 4 and 5 show an embodiment of an outer frame jig used in the method for manufacturing an optical fiber array according to the second embodiment of the present invention. FIG. 4 is an overall perspective view, and FIG. 4A-
It is sectional drawing cut | disconnected by the A line. 4 and 5, 4
1 is a lower frame, 42 is a V-groove portion, 43 is an upper lid, 44 is an injection hole of the optical fiber block main body component, 45 and 46 are cavities for filling the optical fiber block main body component, and 47 is a guide pin.

The V groove 42 is used for guiding and positioning the bare optical fiber portion 13 and the guide pin 47.

The embedded fiber array jig 32, lower frame 4
1. The positioning V-groove portion 42 and the upper lid 43 are each made of Pyrex or quartz having an ultraviolet transmission property.

The embedded fiber array jig 32 is shown in FIG.
As shown in FIG. 7, a V-shaped groove 42 is provided.

The most significant feature of the method for manufacturing an optical fiber array of the first embodiment is that the positioning member and the outer frame are cured by using a light-transmitting outer frame jig to cure the photocurable member. I do. This advantage is, as described above, a major advantage in that photocuring can reduce the stress at room temperature compared to a thermosetting type at a room temperature and can be cured quickly. The outer frame only needs to be partially transparent to ultraviolet light, and not all need to be transparent.

Further, as a result of various studies, it has been clarified that the positioning accuracy of the optical fiber portion after curing is greatly affected by the distortion during curing and the holding state of the bare optical fiber portion.

That is, maintaining the position of the bare optical fiber core portion 13 and protecting the optical fiber tape portion 12 from distortion at the time of curing the members are the most important factors for maintaining accuracy. An array jig 32 is installed in the jig space, and the optical fiber bare core portion 13 is accurately positioned.
Due to the mechanical holding, the positional accuracy of the manufactured optical fiber end face is greatly improved.

(Embodiment 3) FIG. 7 is a perspective view showing a schematic structure of an optical fiber array of Embodiment 3 according to the present invention. Reference numeral 71 denotes a cured UV resin (optical fiber) of Embodiment 3 of the present invention. Reference numeral 72 denotes a primary coating resin portion, and reference numeral 73 denotes a pattern portion of a movable optical fiber array jig.

FIG. 8 is a sectional view showing a configuration of an optical fiber array manufacturing jig according to the third embodiment of the present invention which does not use the embedded type arraying jig. Reference numeral 74 denotes a movable optical fiber arraying jig. As shown in FIG. 9, the movable optical fiber array jig 74 is provided with a V-shaped groove 42.

The working procedure is as follows. The movable optical fiber arrangement jig 74 is set at a predetermined position so as to be aligned with the groove of the V-groove portion 42, and each optical fiber bare core wire 13 is set in each V-groove portion 42.
The UV curable adhesive is dropped only on the contact portion between the optical fiber and the bare optical fiber 13, and the line of the bare optical fiber 13 is solidified and arranged in this state. Next, the movable optical fiber array jig 7
4 is separated from the optical fiber solidified portion, and a space between the lower frame 41 and the upper lid 42 is filled with a UV curable resin mixed with a light-transmitting low expansion coefficient substance. Subsequently, ultraviolet rays are irradiated through the outer frame, and the UV curable resin of the filling is photocured. After light curing
Remove the outer frame.

In the process according to the present invention, no heat is applied to the jig and the optical fiber array at the time of photocuring. Therefore, the manufactured optical fiber array has excellent dimensions which accurately reproduce the dimensions of the jig precisely processed at room temperature. Accuracy can be provided.

Next, the configuration of the optical fiber array block body according to the present invention used in the first, second, and third embodiments will be described.

FIG. 10 is a cross section showing the structure of an embodiment of the optical fiber block body of the present invention. 101 is a quartz bead having a large radius (marble), 102 is a quartz bead having a small radius, and 103 is another portion. UV curable polymer.

In general, the expansion coefficient of a mixture of a polymer having a large expansion coefficient and quartz having a small expansion coefficient is determined by a volume fraction. That is, the expansion coefficient of this mixture is smaller than the expansion coefficient of the polymer and larger than that of the quartz beads (polymer>mixture> quartz beads).

In order to match the dimensional accuracy of the waveguide to be connected, quartz is put in. However, in order to put in as much quartz as possible, the volume in which the polymer enters is reduced by combining large quartz beads and small quartz beads . .

Hereinafter, an experimental example for confirming the effects of the optical fiber array according to the present invention and the manufacturing method thereof will be described.

(Experimental Example 1 of the Present Invention) Pitch Interval 250 μm
m 8-core flat optical fiber tape (outer diameter 125 μmφ, core diameter 10 μmφ, wavelength 1.55 μm band single mode)
Was peeled off, and a bare core wire having a length of 30 mm was prepared.

For comparison of the displacement of the core diameter, a continuous portion of the same lot was used as the optical fiber tape portion used in the following Experimental Example 1 and Comparative Example 1.

The V-grooves (60) for the pins of the lower frame jig shown in FIG.
° angle, depth 750 μm), V-groove 42 for optical fiber
Used a precision dicing saw to machine straight V-grooves into quartz blocks. Pitch accuracy and groove depth are each ± 0.0
Those having a processing accuracy of 2 μm (pin hole × 2, optical fiber slot × 8, cumulative pitch error ± 0.1 μm) were selected and used.

After arranging the bare optical fiber core portion 13 in the V-groove portion 42, an upper cover (made of quartz) is provided, and after filling an ultraviolet curable resin through an injection hole 44 provided in the upper cover, ultraviolet light is irradiated. . After light curing, the optical fiber was taken out of the outer frame, the protruding portion of the optical fiber was cut, and the end face of the optical fiber array was polished.

(Comparative Example 1 with Experimental Example of the Present Invention) After arranging optical fibers on the outer frame used in Experimental Example 1, a thermosetting epoxy adhesive containing a ceramic filler was filled in a thermostat at 60 ° C. for 2 hours. Heat cured. Then, it was taken out of the outer frame and polished at the end face.

(Experimental Example 2 of the Present Invention) The trapezoidal glass block (manufactured by Pyrex) shown in FIGS. 7 and 8 was inserted into the outer frame of Experimental Example 1 and filled with a low refractive index type fluororesin adhesive. After UV curing, it was taken out of the outer frame and polished at the end face.

(Comparative Example 2 with Experimental Example of the Present Invention) 50% by weight of quartz beads (0.3 μmφ) was mixed with the ultraviolet-curable resin of Example 1 and, as in Example 1, after light-curing, was removed from the outer frame. The end face was polished.

(Experimental Example 3 of the Present Invention) Quartz beads (0.2 μmφ) were applied to the fluororesin UV adhesive used in Experimental Example 2 above.
Was mixed and dispersed at 50 wt%, light-cured, taken out of the outer frame and polished at the end face.

(Experimental Example 4 of the Present Invention) Quartz beads (1 μmφ, 0.13 μmφ) were mixed and dispersed in the fluorine adhesive of Experimental Example 3, and the weight ratio to resin was 70 wt%.
This resin was light-cured, taken out of the outer frame, and polished at the end face.

(Experimental Example 5 of the Present Invention) Using a movable optical fiber arrangement jig 74 (manufactured by Pyrex) in which a V-groove portion 42 having the same accuracy as that of Experimental Example 1 was machined, an optical fiber core wire group was arranged. An ultraviolet curable resin (trade name: Photo Bond 300, Muromachi Chemical) is applied to the upper part of the movable optical fiber array jig 74 to a thickness of 130 μm, cured with UV light, and the optical fiber core wire group is taped with an adhesive. A protective coating was made. Next, after lowering the movable optical fiber arrangement jig 74 to the lower surface of the resin filling portion, it was filled with a fluororesin UV adhesive, taken out from the outer frame after photocuring, and polished at the end face.

In order to confirm the effects of the present invention, the items shown in Table 1 were measured for each of the optical fiber arrays produced above. In Table 1, ◎ is very good, ○ is good, Δ
The mark indicates that it can be used, and the cross indicates that it cannot be used.

[0075]

[Table 1]

Although the present invention has been described in detail with reference to the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments and can be variously modified without departing from the gist thereof. Absent.

[0077]

As described above, according to the present invention, since the optical fiber cores are arranged using the V-grooves and then fixed with the upper lid, the position accuracy of the optical fiber cores can be improved.

Further, since the photo-curing process is used without applying a processing temperature, it is possible to prevent distortion due to temperature at the time of solidifying the resin.

Further, since the positioning is performed only at the V-groove at one end, the mechanical strength on the opposite side of the connecting portion is also excellent.

Further, since the main member is made of a material having a low coefficient of expansion, an increase in connection loss at high temperatures such as a heat cycle can be reduced.

The most important point is that the optical fiber array itself has the ability to transmit ultraviolet light in the post-process after the fabrication of the optical fiber array, that is, when the optical fiber array is connected and fixed to the optical component. The UV curing resin bonding process actually used can be used as it is.

Further, the cost can be greatly reduced with respect to existing glass block precision machined parts.

The manufacturing method according to the present invention can reduce the position error in the actual manufacturing process of the optical fiber array.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an optical fiber array according to a first embodiment of the present invention;

FIG. 2 is a view showing a curing process of a thermosetting type according to the first embodiment;

FIG. 3 is a perspective view showing a schematic configuration of an optical fiber array according to a second embodiment of the present invention;

FIG. 4 is a perspective view showing an embodiment of an outer frame jig used in a method for manufacturing an optical fiber array according to a second embodiment of the present invention;

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a diagram showing a configuration of an embedded fiber array jig used in the second embodiment;

FIG. 7 is a perspective view showing a schematic configuration of an optical fiber array according to a third embodiment of the present invention;

FIG. 8 is a perspective view showing an embodiment of an outer frame jig used in the method for manufacturing an optical fiber array according to the third embodiment of the present invention;

FIG. 9 is a diagram showing a configuration of a movable fiber array jig used in a third embodiment;

FIG. 10 is a sectional view showing a configuration of an optical fiber array block main body according to the present invention;

FIG. 11 is a perspective view showing a schematic configuration of a conventional optical fiber array,

FIG. 12 is a diagram for explaining a problem of a conventional optical fiber array;

FIG. 13 is a sectional view showing a conventional completed optical fiber array;

FIG. 14 is a diagram showing a model of an optical component connection and fixing process.

[Explanation of symbols]

11: optical fiber array constituent member, 12: optical fiber tape, 13, 13A: optical fiber tape bare core wire portion, 14
... Guide pin holes, 15 ... Fiber mounting boots, 21 ...
Solidified resin, 22: bare core wire portion embedded in the center of the resin, 23: uncured portion of the resin, 24: heat flow direction, 2
5: Stress, 31, 71: UV resin cured product after curing (optical fiber array block main body component), 32: Embedded fiber array jig, 41: Lower frame, 42: V groove portion, 43: Upper lid, 44 ... Injection holes, 45, 46 ... Cavities, 47 guide pins, 72 ... Primary coating resin part, 73 ... Pattern part of movable fiber array jig, 74 ... Movable fiber array jig, 1
01: large-diameter quartz beads , 102: small-diameter quartz beads , 103: UV-curable polymer.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunori Senda 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Norio Murata 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Nippon Telegraph and Telephone Corporation (72) Inventor Haruki Ozawaguchi 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Nobuo Tomita 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation JP-A-62-276513 (JP, A) JP-A-61-209404 (JP, A) JP-A-3-179405 (JP, A) JP-A-1-227106 (JP) JP-A-59-202277 (JP, A) JP-A-63-270779 (JP, A) JP-A-5-19131 (JP, A) JP-A-5-27413 (JP, A) 1-77605 (J (P, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G02B 6/00-6/54

Claims (3)

(57) [Claims] An optical fiber array manufacturing method for arranging and fixing a plurality of optical fibers at predetermined positions, wherein a fiber array jig is disposed in an outer frame transparent to ultraviolet rays.
And, the plurality of optical fibers on the fiber array jig
Arranging the plurality of optical fibers and arranging the plurality of optical fibers.
UV curable adhesive is dropped on the tool,
Solidified the ultraviolet curing adhesive, and
Solidifying and arranging the plurality of optical fibers in the fiber arranging jig;
To move to the lower part of the resin filling part, separating from the part
And filling the outer frame with a filler that is cured by ultraviolet rays,
Solidifying by irradiating ultraviolet rays, and removing the fiber array jig and the outer frame;
A method for manufacturing an optical fiber array , comprising: 2. The method for manufacturing an optical fiber array according to claim 1, wherein the filler filled in the outer frame contains quartz beads . 3. The method according to claim 2, wherein the quartz beads are a mixture of large quartz beads and small quartz beads .