JPH09285953A - Anisotropic optical fiber assembly holding jig and polishing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obliquely polish the tip of a constant polarization optical fiber in an accurate direction. SOLUTION: A constant polarization optical fiber assembly As is supported by a collet 12 and a sleeve 13 so as to be prevented from being rotated. Then, the direction of an intersection line (n) (direction in which a stress providing hole Ha, an optical fiber R and a stress providing hole Hb are arrayed) is identified by a magnifying glass. Then, the direction is adjusted by rotating the sleeve 13 for holding the constant polarization optical fiber assembly As and a mark 14 is placed in the direction of the intersection line (n). Then, a key pin fixing ring is fixed by a rotation preventing screw so as to be prevented from being rotated. Then, the tip of the constant polarization optical fiber assembly As is polished while being inclined in a fixed direction with respect to the direction of the key pin 15. Thus, since the tip of the optical fiber assembly is obliquely polished to be flat in an accurate direction, a high-quality anisotropic optical fiber having little connection damage and small wave surface fluctuation is manufactured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anisotropic optical fiber assembly holding jig and a polishing apparatus. More specifically, when the tip of an anisotropic optical fiber is obliquely polished, an anisotropic optical fiber assembly holding jig and an anisotropic optical fiber assembly holding jig capable of accurately adjusting the direction of the oblique inclination and the direction of the anisotropic optical fiber The present invention relates to a polishing device that uses a jig.

[0002]

2. Description of the Related Art FIG. 7 shows a sectional view of an example of a polarization maintaining optical fiber assembly. This constant polarization optical fiber assembly As is
It is composed of an optical fiber R and a ferrule F, and its tip is ground to a slanting plane St. In the optical fiber R,
The stress applying portions Ha and Hb are provided at symmetrical positions with the optical fiber core R ′ interposed therebetween. The stress applying part H
a, the optical fiber core R ′, and the stress applying portion Hb
A crossing line t between the plane including and the oblique plane St is in the direction of the inclination of the oblique plane St. Then, a plane including the stress applying portion Ha, the optical fiber core R ′ and the stress applying portion Hb and the optical axis p of the optical fiber core R ′.
An angle θ formed by the intersection line t with respect to an intersection line n of a plane perpendicular to the plane is a tilt angle of the oblique plane St. This angle θ is
Generally, it is 5 ° to 12 °.

FIG. 8 is a schematic explanatory view of an example of a conventional polishing apparatus 500. This polishing apparatus 500 is provided with a polishing plate 101.
And a polishing jig 502. The polishing jig 5
Reference numeral 02 tilts the optical axis p by an angle θ with respect to a straight line q perpendicular to the polishing surface of the polishing plate 101, and holds the above-mentioned constant polarization optical fiber assembly As by the clamp metal fitting 502a.
Sf represents the plane before polishing of the tip of the polarization maintaining optical fiber assembly As.

FIG. 9 is a plan view of the polishing jig 502 viewed from the polishing plate 101 side. The six fixed polarization optical fiber assemblies As are held by the clamp jigs 502a, respectively. At this time, when the crossing line n of each polarization maintaining optical fiber assembly As is adjusted and polished so as to face the valley V ′ of the V groove of each holding portion, the crossing line t is the direction of inclination of the oblique plane St. become.

In some cases, polishing is performed so that the intersection line t is at 90 ° with respect to the direction of inclination of the oblique plane St.

[0006]

Conventionally, the operator adjusts the direction while observing the tip of the constant polarization optical fiber assembly As with a magnifying glass. However, the diameter of the ferrule F of the polarization maintaining optical fiber assembly As is 1.25 mm to 2.5 m.
Since it is as thin as m, it is difficult to adjust the direction, and it is difficult to accurately match the direction of the intersection line n with the valley V ′ of the groove V. As a result, the intersection line t is the oblique plane S
Since it does not coincide with the direction of the inclination of t, there is a problem that the connection loss and the wavefront fluctuation increase. The intersection line t is
The same applies to the case of polishing so that the inclined plane St is inclined by 90 °. Therefore, a first object of the present invention is to provide an anisotropic optical fiber assembly holding jig that enables easy and accurate adjustment of the direction when polishing the tip of the anisotropic optical fiber assembly. . A second object of the present invention is to provide a polishing apparatus for accurately polishing the tip end of an anisotropic optical fiber assembly using the above-mentioned anisotropic optical fiber assembly holding jig.

[0007]

SUMMARY OF THE INVENTION In a first aspect, the present invention provides an anisotropic optical fiber assembly holding jig used for holding an anisotropic optical fiber assembly comprising an anisotropic optical fiber and a ferrule. A tubular member having a cavity for inserting the anisotropic optical fiber assembly and a holding portion for holding the anisotropic optical fiber assembly so that the anisotropic optical fiber assembly does not rotate, and a rotatably attached to the tubular member and different from each other. Provided is an anisotropic optical fiber assembly holding jig, which is provided with an annular member having an indicator for indicating the orientation of the isotropic optical fiber assembly and a rotation stopper for stopping the rotation. In the anisotropic optical fiber assembly holding jig according to the first aspect described above, the anisotropic optical fiber assembly is held by the tubular member so as not to rotate, and the annular member is rotated with respect to the tubular member. The rotation is stopped when a predetermined angle is formed with respect to the orientation of the anisotropic optical fiber assembly, and the assembly is fixed by the rotation stopper. According to this, since the diameter of the annular member is larger than that of the anisotropic optical fiber assembly, it is possible to easily adjust the amount and to accurately adjust the direction.

According to a second aspect, the present invention is a polishing apparatus for polishing the tip of an anisotropic optical fiber assembly composed of an anisotropic optical fiber and a ferrule obliquely, comprising a polishing plate,
One or more anisotropic optical fiber assembly holding jigs having the above-described configuration are tilted at a constant angle with respect to the polishing plate, and the direction of the pointing portion of the anisotropic optical fiber assembly holding jig is fixed with respect to the tilt direction. Provided is a polishing device including a polishing jig for holding the polishing device. In the polishing apparatus according to the second aspect, one or more anisotropic optical fiber assembly holding jigs having the above configuration are tilted with respect to the polishing plate at a constant inclination, and the direction of the indicator is fixed with respect to the inclination direction. And hold. Here, the pointing portion of the anisotropic optical fiber assembly holding jig is at a predetermined angle with respect to the orientation of the anisotropic optical fiber assembly. As a result, the direction of inclination is accurately determined,
The tip of the anisotropic optical fiber assembly can be polished obliquely.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited by this.

FIG. 1 is an exploded perspective view of one embodiment of the anisotropic optical fiber assembly holding jig of the present invention. The anisotropic optical fiber assembly holding jig 10 includes a collet pipe 11 for inserting a polarization maintaining optical fiber assembly (As in FIG. 2),
A collet 12 for holding the fixed polarization optical fiber assembly so that the fixed polarization optical fiber assembly does not rotate, a sleeve 13 for inserting the collet pipe 11, and a rotatably attached to the sleeve 13 and the fixed polarization light. A key pin 15 and a key pin fixing ring 17 having a rotation stop screw 16 for stopping the rotation and a stopper pin having a fixing screw 19 screwed into the sleeve 13 and provided with a mark 14 indicating the direction of the fiber assembly. 20 and a collet tightening nut 22 screwed onto the collet pipe 11.

FIG. 2 is an assembly sectional view showing a state in which the polarization maintaining optical fiber assembly As is held by the anisotropic optical fiber assembly holding jig 10. First, collet pipe 11
Is inserted into the sleeve 13. Next, the key pin fixing ring 17 is fitted on the sleeve 13. Next, the stopper nut 20 is screwed in to a predetermined position of the sleeve 13, and the fixing screw 19
Fix with. Next, the collet tightening nut 22 is loosely screwed into the collet pipe 11. Then, the constant polarization optical fiber assembly As is inserted into the collet pipe 11 and protruded from the collet 12 by a predetermined length. Then, the collet tightening nut 22 that has been loosely screwed in is tightly screwed in, and the fixed polarization optical fiber assembly As is tightened and fixed by the collet 12.

Next, the operator operates a magnifying glass (for example, a radius of curvature / eccentricity measuring device OSR-1 manufactured by Tokyo Special Electric Wire Co., Ltd.).
1) is used to view the pre-polishing plane Sf at the tip of the polarization-maintaining optical fiber assembly As, and the direction of the cross line n shown in FIG.
Make sure. Next, the sleeve 13 holding the constant polarization optical fiber assembly As is rotated to adjust the direction, and the mark 14 is aligned with the direction of the intersection line n as shown in FIG. Then, it is fixed with the rotation stop screw 16. Since the diameter of the key pin fixing ring 17 is larger than the ferrule F (for example, 18 mm), it is easy to adjust the direction, and the mark 14 can be accurately aligned with the direction of the intersection line n.

FIG. 5 is a schematic sectional view of an embodiment of the polishing apparatus of the present invention. The polishing apparatus 100 includes a polishing plate 1
01 and four pieces of the anisotropic optical fiber assembly holding jig 1
And a polishing jig 102 for holding 0. As shown in FIG. 6, the polishing jig 102 has four parallel insertion holes 103 obliquely formed at an angle θ. Further, each insertion hole 103 is provided with a key groove 104 on the back side of the oblique inclination.

As shown in FIG. 5, the anisotropic optical fiber assembly holding jig 1 is so arranged that the key pin 15 of the anisotropic optical fiber assembly holding jig 10 is fitted in the key groove 104.
When 0 is inserted into each insertion hole 103 and the polishing plate 101 is rotated, the tip of the polarization-maintaining optical fiber assembly As can be polished into an oblique plane (St in FIG. 7). Then, as shown in FIG. 7, the intersection line t becomes the direction of the inclination of the oblique plane St.

Since all the insertion holes 103 of the polishing jig 102 are parallel to each other, all the insertion holes 103 can be formed without changing the inclination of the drill, and the polishing jig 102 is easy to manufacture. Also, the work of inserting the anisotropic optical fiber assembly holding jig 10 into each insertion hole 103 becomes easy.

When polishing is performed so that the intersecting line t is in the direction of the inclination of the oblique plane St and the direction of 90 °, the position of the key groove 104 of each insertion hole 103 may be changed by 90 °.

[0017]

According to the anisotropic optical fiber assembly holding jig and the polishing apparatus of the present invention, the annular member having a diameter larger than that of the ferrule is rotated to adjust the direction. You can adjust the direction.
Therefore, the tip of the anisotropic optical fiber assembly can be polished into a slanted plane in the correct direction. As a result, it becomes possible to manufacture a high-quality anisotropic optical fiber with small connection loss and wavefront fluctuation.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an anisotropic optical fiber assembly holding jig according to an embodiment of the present invention.

FIG. 2 is an assembled sectional view of the anisotropic optical fiber assembly holding jig of FIG.

FIG. 3 is an explanatory diagram of a direction of a constant polarization optical fiber and a direction of a key pin.

FIG. 4 is an explanatory diagram of direction adjustment of the direction of a constant polarization optical fiber and the direction of a key pin.

FIG. 5 is a schematic sectional view of a polishing apparatus according to an embodiment of the present invention.

6 is a plan view of a polishing jig in the polishing apparatus of FIG.

FIG. 7 is a perspective view of a tip portion of a polarization-maintaining optical fiber assembly.

FIG. 8 is a schematic sectional view of an example of a conventional polishing apparatus.

9 is a plan view of a polishing jig in the polishing apparatus of FIG.

[Explanation of symbols]

 10 Anisotropic Optical Fiber Assembly Holding Jig 11 Collet Pipe 12 Collet 13 Sleeve 14 Mark 15 Key Pin 16 Rotation Set Screw 17 Key Pin Fixing Ring 100 Polishing Device 101 Polishing Plate 102 Polishing Jig 103 Insert Hole 104 Key Groove As Constant Polarization Optical Fiber Assembly Solid R Optical fiber R'Optical fiber core Ha, Hb Stress applying part St Oblique plane Sf Pre-polishing plane t, n Cross line

Claims (2)

[Claims] 1. An anisotropic optical fiber assembly holding jig used for holding an anisotropic optical fiber assembly composed of an anisotropic optical fiber and a ferrule, wherein a hollow portion for inserting the anisotropic optical fiber assembly and the anisotropic optical fiber are provided. A cylindrical member having a gripping portion for gripping the anisotropic optical fiber assembly so that the assembly does not rotate, an indicator rotatably attached to the cylindrical member and indicating the orientation of the anisotropic optical fiber assembly, and the rotation. An anisotropic optical fiber assembly holding jig, comprising: an annular member having a rotation stopping portion for stopping. 2. A polishing apparatus for obliquely polishing the tip of an anisotropic optical fiber assembly comprising an anisotropic optical fiber and a ferrule, comprising a polishing plate and one or more anisotropic optical fiber assembly holding jigs. And a polishing jig for holding the tool with a constant inclination with respect to the polishing plate and with the direction of the pointing portion of the anisotropic optical fiber assembly holding jig fixed with respect to the inclination direction. And polishing equipment.