JPH11326683A - Optical wiring parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a packaging area and to prevent the shielding of a cooling passage. SOLUTION: An optical connector is connected to the first one end of an optical fiber cord 20, and one end of a casing 11 is provided with an aperture 11a. A cap 12 is fixed by fitting into the aperture 11a of the casing 11 and a case 2 comprising the casing 11 and the cap 12 is internally provided with a winding core 13. A sheet-like member having flexibility and an optical circuit 16, consisting of an optical waveguide are housed into this case 23. Furthermore, one end of the optical circuit 16 is adhered to the flank of this winding core 13 by a thermal conductive adhesive, and the optical circuit 16 is wound around the winding core 13 and is deformed to a cylindrical body and is lap wound to a cylindrical form. The core part of the optical waveguide exposed to the flank of the optical circuit 16, and the core part at the front end of the optical fiber exposed from the other second one end of the optical fiber cord 20 are connected optically, in such a manner that the optical axes coincide. The cap 12 is provided with a extracting port 12a and a reinforcing member 21 is mounted at this extracting port 12a. The optical fiber cord 20 is made to penetrate through a reinforcing member 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical wiring component used for an optical communication system or the like.

[0002]

2. Description of the Related Art An optical circuit (Flexible Optical Backplan) is used to simplify the processing of extra length of an optical fiber for optically connecting between units and boards in an optical communication device of an optical communication system.
Optical wiring components having e) have been proposed (for example,
Q. Tan et. Al., "A Parallel Optical Link for Intra
-and Inter-Rack Interconnections "; Proc. 47th ECT
C, pp. 234-239 (1997)).

FIG. 6 is a diagram showing an optical wiring component having a conventional optical circuit. As shown in the figure, the polyimide film 1
An optical fiber coated with an epoxy resin and bonded with a polyimide film 1 is bonded to a polyimide film 1 so that an optical waveguide 2 is wired and a polyimide film 3
Is bonded to the polyimide film 1 with the optical waveguide 2 interposed therebetween, and an optical circuit 4 is constituted by the polyimide film 1, the optical waveguide 2, and the polyimide film 3, and the core portion of the optical waveguide 2 exposed at the end face of the optical circuit 4 and the optical fiber An optical fiber is optically connected to the core portion at the tip of the optical fiber exposed from one end of the cord 5 so that the optical axis is aligned with the core, and the optical connector 6 is connected to the other tip of the optical fiber cord 5.

[0004]

However, such an optical wiring component requires large-area polyimide films 1 and 3 to form a large-scale optical circuit 4.
When the mounting area increases and the optical circuit 4 is installed in parallel with the upper surface of the unit, the cooling passage is blocked, so that the heat radiation of the entire device is impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide an optical wiring component having a small mounting area and not blocking a cooling passage.

[0006]

In order to achieve the above object, according to the present invention, an optical connector is connected to a first end of an optical fiber cord, and the optical connector is exposed from the other second end of the optical fiber cord. In an optical wiring component in which the tip of an optical fiber is optically connected to an optical circuit, an optical circuit in which an optical waveguide is provided on a sheet-like member molded or deformed in a cylindrical shape is used, and the core at the tip of the optical fiber is used. The portion and the core portion of the optical waveguide exposed on the side surface parallel to the winding center line of the optical circuit are optically connected so that the optical axes coincide.

In this case, the above optical circuit is wound in a tubular shape.

In these cases, the plurality of optical circuits are stacked in a tubular shape.

In these cases, a flexible member is used as the sheet-like member.

In these cases, the optical circuit is wound around a winding core.

In these cases, the optical circuit is housed in a case consisting of a cylindrical housing having an opening and a lid fixed to the opening, and a reinforcement is provided in an outlet provided in the lid. A member is attached, and the optical fiber cord is passed through the reinforcing member.

[0012]

FIG. 1 is a perspective view showing an optical wiring component according to the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 shows a part of the optical wiring component shown in FIG. FIG. As shown in the figure, an optical connector (MT connector) 22 is connected to a first end of an optical fiber cord 20 coated with a primary coating made of a soft UV resin and having an outer diameter of 250 μm. Also,
Fig. 2 The outer dimension in the left-right direction of the paper, that is, the length is 25.5
2, an opening 11a is provided at one end of a rectangular cylindrical housing 11 having an outer dimension in the vertical direction on the paper of FIG. 2, that is, a height dimension of 5.5 cm, and an outer dimension in a direction perpendicular to the paper of FIG. The lid 12 is fixed to the opening 11a of the housing 11 by fitting, and a case 23 is formed by the housing 11 and the lid 12. In addition, a winding core 13 made of metal or plastic having two curved surfaces with a radius of curvature of 2.5 cm on the side surface and having a dimension perpendicular to the plane of FIG. 13 is provided with a screw hole 14 in a direction perpendicular to the plane of FIG. 2, that is, a width direction.
It is attached to both sides perpendicular to the width direction line. Also,
A 20 cm square polyimide film (Kapto
n) A single mode optical fiber (9.3 / 1) coated with an epoxy resin on 17 and coated with polyimide.
25 μm) is adhered to the polyimide film 17, a fiber pigtail type optical waveguide (optical wiring) 18 is laid, the polyimide film 19 is adhered to the polyimide film 17 with the optical waveguide 18 interposed therebetween, and the polyimide film 17 is more flexible. A sheet-like member 24 having a property is formed, and the optical circuit 16 is formed by the sheet-like member 24 and the optical waveguide 18. Further, the optical circuit 1 is provided in the case 23.
6 is housed, and one end of the optical circuit 16 is adhered to the side surface of the winding core 13 with a heat conductive adhesive.
The optical circuit 16 is wound in a cylindrical shape and deformed into a tubular shape, and the optical circuit 16 is wound in a tubular shape. Further, the core portion of the optical waveguide 18 exposed on the side surface parallel to the winding center line of the optical circuit 16, that is, the left side surface 16a of the optical circuit 16 in FIG. 3 and the other second end of the optical fiber cord 20 are exposed. The optical fiber is optically connected to the core portion at the distal end so that the optical axis is aligned. Further, an outlet 12a is provided in the lid 12, a reinforcing member 21 made of rubber is attached to the outlet 12a, and the optical fiber cord 20 penetrates the reinforcing member 21.

In this optical wiring component, since the optical circuit 16 which has been deformed into a cylindrical shape and wound in an overlapping manner is accommodated in the case 23, the mounting area is small even if a large-scale optical circuit 16 is formed. In addition, since the cooling passage is not blocked, the heat radiation of the entire apparatus is not impaired. Further, since a flexible member is used as the sheet member 19, it can be easily manufactured. Further, since the optical circuit 16 is wound around the winding core 13, it can be easily manufactured. In addition, the optical circuit 16 is
The optical circuit 16 can be protected because the reinforcing member 21 is attached to the outlet 12a of the lid 12 of the case 23 and the optical fiber cord 20 is passed through the reinforcing member 21. Further, since the reinforcing member 21 made of rubber is attached to the outlet 12a and the optical fiber cord 20 penetrates the reinforcing member 21, it is possible to prevent the optical fiber cord 20 from being bent.

FIG. 4 is a perspective view showing another optical wiring component according to the present invention, and FIG. 5 is a sectional view taken along line BB of FIG. As shown in the figure, the first of the optical fiber cords 40a and 40b coated with a primary coating made of a soft UV resin and having an outer diameter of 250 μm.
Is connected to an optical connector (MT connector) 42 at one end. Also, the outer dimension in the left-right direction of FIG. 2 is 25.5c.
m, an opening 31a is provided at one end of a rectangular cylindrical housing 31 having an outer dimension of 5.5 cm in the vertical direction on the paper of FIG. 2 and an outer dimension of 8 cm in a direction perpendicular to the paper of FIG. The body 32 is fixed by fitting, and the case 31 and the lid 32 constitute a case 43. Further, a winding core 33 made of metal or plastic having two curved surfaces with a radius of curvature of 2.5 cm and a width dimension of 25 cm is provided on the side surface in the case 43, and a screw hole in the width direction is formed in the winding core 33. A winding core 33 is attached to both sides of the housing 31 at right angles to the width direction line by screws 35 penetrating the screw holes 34. Further, optical circuits 36a, 36b having the same configuration as the optical circuit 16 and having the same or different optical waveguide patterns are housed in the case 43, and the optical circuits 36a, 36
b is bonded to the side surface of the winding core 33 with a heat conductive adhesive, the optical circuits 36a and 36b are wound around the winding core 33 and deformed into a cylindrical shape, and the optical circuits 36a and 36b are stacked in a cylindrical shape. The optical circuit 36a and the optical circuit 36b are wound in a tubular shape. Also, the core portion of the optical waveguide exposed on the side surface parallel to the winding center lines of the optical circuits 36a and 36b and the core portion at the tip of the optical fiber exposed from the other second end of the optical fiber cords 40a and 40b are optically coupled. Optically connected so that the axes coincide. The lid 32 has an outlet 32a.
Is provided, and a reinforcing member 41 made of rubber is provided in the outlet 32a.
Are attached, and the optical fiber cords 40 a and 40 b pass through the reinforcing member 41.

In this optical wiring component, since the optical circuit 36a and the optical circuit 36b are housed in the case 43 in a cylindrical shape, the mounting area is further reduced.

In the above-described embodiment, the optical circuits 16, 36a to 36b deformed into a cylindrical shape are used, but optical circuits formed into a cylindrical shape may be used. In the above-described embodiment, the housings 11 and 31 having the openings 11a and 31a at one end are used. However, the housings having the openings at both ends are used, and the lids are attached to both ends of the housing. Reinforcing members may be respectively attached to the outlets provided in the lids, and the optical fiber cord may be penetrated through both reinforcing members. Also,
In the above-described embodiment, the optical circuits 16 and 36a in which the optical fiber is bonded to the polyimide film 17 by bonding the optical fiber to the polyimide film 17 and the polyimide film 19 is bonded to the polyimide film 17 with the optical waveguide 18 interposed therebetween.
36b was used, but fluorinated polyimide, polycarbonate, silicone resin, polymethyl methacrylate (P
An optical circuit in which an optical waveguide is directly formed inside a sheet member made of a polymer film such as MMA), benzocyclobutene, or epoxy resin may be used. Further, in the above-described embodiment, the flexible sheet-like member 24 is used, but a non-flexible sheet-like member made of glass or the like may be used as long as it is formed in a cylindrical shape. In the above-described embodiment, the optical waveguide 18 is formed inside the sheet-like member 24, but an optical waveguide made of an optical fiber or the like may be provided outside the sheet-like member. In the above-described embodiment, the lids 12 and 32 are
Is fixed by fitting, but the lid may be fixed to the housing by bonding, or the lid may be fixed to the housing by using an yttrium aluminum garnet (YAG) laser. The lid may be fixed to the housing. In the above embodiment, the screws 15, 35
Although the winding cores 13 and 33 are attached to both surfaces perpendicular to the width direction lines of the housings 11 and 31, the winding cores may be attached to one surface perpendicular to the width direction lines of the housing. Further, in the above-described embodiment, the housings 11 and 31 each having a quadrangular prism shape are used. However, a housing such as a polygonal prism such as a hexagonal prism and a cylinder may be used. Further, in the above embodiment, the case 43
The optical circuits 36a and 36b are housed in the case.
The above plurality of optical circuits may be housed. Further, in the above-described embodiment, one winding core 13 and 33 are provided in each of the cases 23 and 43, but a plurality of winding cores may be provided in the case. The pattern of the optical waveguide may be a pattern including a coupler, an arrayed optical waveguide grating, a branch circuit, and a thermo-optic effect switch.

[0017]

In the optical wiring component according to the present invention, since the optical circuit deformed in a cylindrical shape is housed in the case, the mounting area is reduced even if a large-scale optical circuit is formed. Also, the cooling passage is not blocked.

When the optical circuit is wound in a cylindrical shape, the mounting area is further reduced.

Further, when a plurality of optical circuits are stacked in a cylindrical shape, the mounting area is further reduced.

When a flexible member is used as the sheet member, it can be easily manufactured.

Further, when the optical circuit is wound around the winding core, it can be easily manufactured.

Further, the optical circuit is housed in a case composed of a cylindrical housing having an opening and a lid fixed to the opening, and a reinforcing member is attached to an outlet provided in the lid, and an optical circuit is provided. When the fiber cord is passed through the reinforcing member, the optical circuit can be protected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an optical wiring component according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing a part of the optical wiring component shown in FIG. 1;

FIG. 4 is a perspective view showing another optical wiring component according to the present invention.

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

FIG. 6 is a diagram showing an optical wiring component having a conventional optical circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Housing 11a ... Opening 12 ... Lid 12a ... Outlet 13 ... Wound core 16 ... Optical circuit 18 ... Optical waveguide 20 ... Optical fiber cord 21 ... Reinforcing member 22 ... Optical connector 23 ... Case 24 ... Sheet-shaped member DESCRIPTION OF SYMBOLS 31 ... Housing 31a ... Opening 32 ... Lid 32a ... Outlet 33 ... Wound core 36a ... Optical circuit 36b ... Optical circuit 40a ... Optical fiber cord 40b ... Optical fiber cord 41 ... Reinforcement member 42 ... Optical connector 43 ... Case

Claims (6)

[Claims] 1. An optical wiring component comprising: an optical connector connected to a first end of an optical fiber cord; and an end of an optical fiber exposed from the other second end of the optical fiber cord optically connected to an optical circuit. Using the optical circuit provided with an optical waveguide on a sheet-like member molded or deformed into a cylindrical shape, the optical circuit was exposed on the side surface parallel to the core portion at the tip of the optical fiber and the winding center line of the optical circuit. An optical wiring component, wherein the optical waveguide component is optically connected to the core portion of the optical waveguide so that the optical axis is aligned. 2. The optical wiring component according to claim 1, wherein said optical circuit is wound in a tubular shape. 3. The optical wiring component according to claim 1, wherein a plurality of the optical circuits are stacked in a cylindrical shape. 4. The optical wiring component according to claim 1, wherein a flexible member is used as said sheet-shaped member. 5. The optical wiring component according to claim 1, wherein said optical circuit is wound around a winding core. 6. The optical circuit is housed in a case composed of a cylindrical housing having an opening and a lid fixed to the opening, and a reinforcing member is provided in an outlet provided in the lid. The optical wiring component according to any one of claims 1 to 5, wherein the optical fiber cord is attached and penetrated by a reinforcing member.