CN1317577C - 1×N plastic fiber optic coupler - Google Patents

Abstract

The present invention relates to a 1*N plastic optical fiber coupler which comprises a main plastic optical fiber and N branch plastic optical fibers, wherein N is a natural number greater than 2. The main plastic optical fiber is connected with the N branch plastic optical fibers through a funnel-shaped waveguide member. The plastic optical fiber coupler has the advantages of uniform light splitting ratio, low insertion loss, simple structure and low preparation cost, and is suitably used as a wave separator or a wave synthesizer in plastic optical fiber networks.

Description

1×N plastic fiber optic coupler

Technical field:

The invention relates to an optical fiber coupler, in particular to a 1×N plastic optical fiber coupler suitable for use as a wave splitter or a wave combiner in a plastic optical fiber network.

technical background:

In recent years, plastic optical fiber as the transmission medium of broadband local area network has become a research hotspot at home and abroad. Plastic optical fiber is expected to compete with cables and quartz optical fibers with significant performance-price ratio advantages, thus becoming a main transmission medium of high-speed local area network. Since the installation cost occupies a considerable proportion in the total cost of the local area network, plastic optical fiber needs a large number of high-performance and low-cost optical fiber connectors and couplers to achieve significant performance-price ratio advantages in connection-intensive local area networks.

The plastic optical fiber coupler prepared by the mixing rod method has the advantages of simple structure, convenient manufacture, and low cost. At present, N×N and 1×N plastic optical fiber couplers have been prepared at low cost by using the mixing rod method. These couplers have the disadvantages of poor splitting ratio uniformity and large insertion loss.

Invention content:

The object of the present invention is to provide a 1×N plastic optical fiber coupler with uniform light splitting ratio and low insertion loss at low cost.

To achieve the above object, the present invention adopts following scheme:

A 1×N plastic optical fiber coupler, comprising a main plastic optical fiber (1) and N branch plastic optical fibers (2), where N is a natural number greater than 2, characterized in that the main plastic optical fiber (1) passes through a funnel-shaped waveguide (3 ) are connected with N branched plastic optical fibers (2). The circular end surface (3-2) of the above-mentioned funnel-shaped waveguide (3) is connected to the main plastic optical fiber (1), and the axis of the main plastic optical fiber (1) coincides with the funnel center line of the funnel-shaped waveguide (3) A straight line; the large annular end face (3-1) of the funnel-shaped waveguide (3) is connected with the inclined surfaces of N branch plastic optical fibers (2), so that the axis of each branch plastic optical fiber (2) is connected with the funnel-shaped waveguide ( 3) The funnel busbars are parallel. The above-mentioned funnel-shaped waveguide (3) is respectively bonded to the main plastic optical fiber (1) and the branch plastic optical fiber (2) by the glue matching the refractive index. The inner and outer surfaces of the above-mentioned funnel-shaped waveguide (3) are coated with a metal film (4) with high reflectivity.

Compared with the prior art, the present invention has the following obvious outstanding advantages: the 1×N plastic optical fiber coupler in this aspect has uniform light splitting ratio, low insertion loss, simple structure, low preparation cost, and is suitable for splitting in plastic optical fiber networks. oscillator or combiner.

Description of drawings:

Fig. 1 is a schematic perspective view of the structure of an embodiment of the present invention (only one branch optical fiber is shown in the figure).

Fig. 2 is a schematic cross-sectional view of the structure along the axis of an embodiment of the present invention.

Fig. 3 is a schematic diagram of the structure of the funnel-shaped waveguide in the example of Fig. 1 .

FIG. 4 is a schematic diagram of the large end face of the funnel-shaped waveguide in the example in FIG. 2 .

Fig. 5 is a schematic diagram of the branch optical fiber structure in the example of Fig. 1 .

Detailed ways:

A preferred embodiment of the present invention is:

Referring to Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5, this 1×6 plastic optical fiber coupler includes a main plastic optical fiber 1 and N branch plastic optical fibers 2, N=6, and the main plastic optical fiber 1 passes through a plastic funnel The shaped waveguide 3 is connected with 6 branched plastic optical fibers 2. The circular small end face 3-2 of the above-mentioned funnel-shaped waveguide 3 is connected to the main plastic optical fiber 1, and the axis of the main plastic optical fiber 1 overlaps with the funnel center line of the funnel-shaped waveguide 3 to form a straight line; The large ring-shaped end face 3-1 is connected to the oblique surfaces of the six branched plastic optical fibers 2, so that the axis of each branched plastic optical fiber 2 is parallel to the funnel generatrix of the funnel-shaped waveguide 3. The above-mentioned funnel-shaped waveguide 3 is respectively bonded to the main plastic optical fiber 1 and the branch plastic optical fiber 2 by refractive index matching glue. The inner and outer surfaces of the above-mentioned funnel-shaped waveguide 3 are coated with a metal film 4 with high reflectivity.

Claims (2)

1. A 1×N plastic optical fiber coupler, comprising a main plastic optical fiber (1) and N branch plastic optical fibers (2), N being a natural number greater than 2, characterized in that the main plastic optical fiber (1) passes through a funnel-shaped waveguide The part (3) is connected with N branch plastic optical fibers (2); the circular end face (3-2) of the funnel-shaped waveguide part (3) is connected with the main plastic optical fiber (1), and the main plastic optical fiber (1 ) axis coincides with the funnel center line of the funnel-shaped waveguide (3) into a straight line; the annular large end face (3-1) of the funnel-shaped waveguide (3) is connected to the oblique surface of N branch plastic optical fibers (2) , so that the axis of each branch plastic optical fiber (2) is parallel to the funnel generatrix of the funnel-shaped waveguide (3); the funnel-shaped waveguide (3) is matched with the main plastic optical fiber (1) and the The branched plastic optical fibers (2) are bonded together. 2. The 1×N plastic optical fiber coupler according to claim 1, characterized in that the inner and outer surfaces of the funnel-shaped waveguide (3) are coated with a metal film (4) with high reflectivity.

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