JPS592013A - Guide device of optical fiber - Google Patents

Abstract

PURPOSE:To contain easily and surely optical fibers which are not paralleled owing to an electrostatic phenomenon into the V grooves of a fusion connector, by providing fiber guides of metallic materials projecting upward from a V- grooved base. CONSTITUTION:The V-groove guide 28 of a fusion connector for optical fibers, a guide 28 projecting upward in the upper half part from a V-groove base 20, the V-groove 30 of the base 20, and a fiber guide 50 of a metallic material provided with deep slits 52 of the same number as the number of 20 are provided. Optical fibers 12 which cross each other and do not parallel with each other owing to an electrostatic phenomenon are matched in parallel by the above- mentioned guide 30, and static charge is discharged, whereby the optical guides are easily and surely stored in the grooves 30, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical fiber guiding device mainly used in a flat-type multi-core optical fiber connecting device, and can also be used in the case of a core optical fiber.

Background of the Invention Multi-core optical fibers are currently of the S-core flat type (diameter of fiber 12/25 μm, spacing (
7, J) has become the standard, so I will explain using it as an example. Note that 14 is a sheath.

When fusion splicing the S-core optical fibers 10, multiple fibers 12 are fused at the same time. For this purpose, it is necessary to insert the five fibers 12 into the V-groove and fix them in the same way as in the case of single-core optical fibers. The circumstances at that time are explained as follows.

In "@/Figure", 20 is a V groove stand, and 5 on the top surface.
The V grooves 22 of the book are provided parallel to each other at equal intervals with the fibers 12 of the optical fiber 10 (<0.3 mm interval).

The depth of the V groove 22 is such that the lower half of the fiber 12 is accommodated therein (FIG. 3).

24 is a horizontal groove, and 26 is an electrode. This V-groove stand 20 is fixed to a frame (not shown) of the fusing device.

28 is a V groove guide, which is provided at the rear of the V groove stand 20 (upper left in the figure, see the arrow). This is a substantially square block whose upper surface is at the same height as the V-groove base 20, and five V-grooves 60 are provided thereon on an extension line of the V-grooves 22.

This V groove guide 28 is fixed on the movable table 34. The movable table 34 is usually provided with an inclined surface 36,
There is a corner groove 6 in which the sheath 14 of Hikari 7 Aipa 10 fits.
8 is the formation.

Then, as in ``@2tlJJ, put the sheath 14 of the optical fiber 10 into the square groove 38 and hold it with the sheath clamp 42, and also put the fiber 12 into the V groove 60S20 and hold it with the 7 eyeball clamp 44.46r (@3 figure ), then the five fibers 12 are simultaneously connected to the m-pole 26 as described above.
fusion splice.

However, as mentioned above, the intervals between the V grooves 20 and 60 are 0.
It is very narrow at 3mm, and the width of each groove is 0./Ryu (
Leprosy and very thin. Therefore, there is one fiber in each groove.
It is very difficult to fit 2 pieces one by one. People/Heather/
Even if you try to put it in the main groove, it will be difficult to see with the human eye.Q, 3
It is difficult to distinguish such narrow intervals.

Due to electrostatic phenomenon, the fiber 12 protruding above it
They often intersect with each other or open apart as shown in the figure, and are often not aligned parallel to each other, making it increasingly difficult to insert the 7-eyeper 12 into the groove.

The present invention is an attempt to solve the above problem, and by using a fiber guide described below, it is possible to easily fit the seven-eyeper 12 into each groove.

Example rms,! 3, 50 is a fiber guide. This is, for example, a nearly rectangular metallic block,
In addition, a slit 52 in the longitudinal direction extending from the upper surface to near the lower end is provided like the teeth of a comb. The interval between each slit 52 is <0.3 mm, which is the same as the V groove 60 and the like.

This fiber guide 50 has a substantially lower half that fits into a hole 54 provided at the rear of the V-groove guide 28 and
The upper half protrudes above the upper surface of the V groove 60. Also, each pickpocket 2) 52 is V groove 22 or 30
so that they line up on the same straight line.

When I put out the fiber 12 of the river optical fiber 10, the r fifth
As shown in Figure J, the fiber 12 near the opening of the sheath 14
into the slit 52 of the fiber guide 50. Then, each fiber 12 naturally becomes parallel and fits within the V groove 30.22. In particular, when the 7-eyeper guide 50 is made of metal,
Since the moving table 64 that fixes it is generally made of metal and grounded, the electrostatic charge on the fiber 12 is discharged, and the fiber 12, which had previously been bent due to electrostatic phenomena, immediately becomes straight. Become.

Furthermore, as shown in Figure 7, it is necessary to align the tips of the fibers 12 by applying them to the alignment plate 56 prior to fusion splicing, but at this time the protruding fibers 12 are pushed back. However, even in that case, the slit 52 of the fiber guide 50 is cut below the upper surface of the V-groove guide 28 (near the lower end of the fiber guide 5o), so the inside of the slit 52 is It can be bent freely and breakage can be avoided◇ Although the above description has been made regarding the j-core optical fiber 10, the present invention can also be applied to the case of the j-core optical fiber 10.

Effects of the Invention By simply inserting the fiber 12 into the slit 52 of the fiber guide 50, the fiber 12 will naturally fit into the V-groove, making the work easier. This is particularly advantageous in the case of multi-core optical fibers.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams sequentially showing the conventional work situation of fitting the fiber 12 into the V-groove, Figure 3 is an enlarged cross-sectional view of ``G'' in Figure 2, and Figure 2 is a static observation phenomenon. Fig. 1 is an explanatory diagram of a state in which the fibers 12 are not straight; Fig. 4 is a perspective view of an embodiment of the present invention; Fig. 4 is a cross-sectional side view; Fig. 7 is an explanatory diagram of a state in which the tips of the fibers 12 are aligned. 10: Optical fiber 12: Fiber 14: Sheath 20: V groove base 22: V groove 28: V groove guide 60: V groove 50: Fiber guide 52 Nislit
54: Hole Patent Applicant Nippon Seishin Minwa Public Company @ 11 Fusen Co., Ltd. Managing Director Keiji 1 - 70 - s6 Figure 7

Claims (1)

[Claims] A fiber guide having at least seven V grooves and having the same number of slits as the V grooves is arranged on the same straight line and is made of a suitably shaped block, behind the V groove base glass, the slits and the V grooves being aligned on the same straight line, An optical fiber guiding device characterized in that the upper half thereof is provided so as to protrude above the upper surface of the V-groove base.