CN1300613C - Moving plastic optical fibre coupler - Google Patents

Abstract

The invention relates to an active plastic optical fiber coupler. It includes a main optical fiber, a branch optical fiber, a plug, an installation box, and a sliding block. The number of branch fibers of the coupler can be flexibly increased or decreased according to needs, and has the advantages of simple structure, low cost and the like.

Description

Active Plastic Fiber Optic Coupler

Technical field:

The invention relates to an optical fiber coupler, in particular to a movable 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 branch of the plastic optical fiber coupler that appears at present is fixed. In practical applications, sometimes it is necessary to insert the optical branch, and sometimes it is necessary to remove the optical branch. The coupler with the fixed branch cannot meet this requirement. At present, there is no movable plastic optical fiber coupler that can flexibly insert and pull out the optical path.

Contents of the invention

The object of the present invention is to provide a movable plastic optical fiber coupler, which can flexibly increase or decrease the branches of the coupler as required.

To achieve the above object, the present invention adopts the following technical solutions:

An active plastic optical fiber coupler, including main optical fiber, branch optical fiber, switch pin, sliding block and installation box, is characterized in that there are N V-shaped grooves on the section of the main optical fiber in the installation box, and there are sliding matching on the installation box N pieces of sliding blocks, each sliding block is fixedly inserted with a branch fiber and a switch pin, the end of the branch fiber and the head of the switch pin are V-shaped that match the V-shaped groove on the main fiber The light-facing inclined surface of the branch optical fiber V-shaped head is coated with metal reflective film, the connecting surface of the switch pin and the head is coated with metal reflective film, the sliding block is slidingly matched with the chute on the installation box, and the displacement positioning of the sliding block It should be ensured that: when the sliding branch fiber is stopped, the V-shaped head of the switch pin coincides with the V-shaped groove of the main fiber; when the sliding switch pin is stopped, the V-shaped head of the branch fiber coincides with the main fiber The V-groove of the optical fiber fits well. The V-shaped head of the branch fiber and the switch pin is a cylindrical body with a 45-degree angle to the axial direction to form an oblique end face; the V-shaped groove on the main fiber is a shaped groove formed by two cut surfaces that are perpendicular to the axis of the main fiber and at an angle of 45 degrees . The matching structure between the sliding block and the chute on the installation box is a wedge-shaped structure: the cross section of the sliding block is dovetail-shaped, which is slidingly matched with the dovetail-shaped chute of the installation box.

Compared with the prior art, the present invention has the following obvious outstanding substantive features and significant advantages: the present invention adopts a main optical fiber and N branch optical fibers to be slidably connected, so that the number of branches of the coupler can be flexibly adjusted according to needs increase or decrease; simple structure, low cost.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the present invention;

Fig. 2 is the A-A sectional view of implementation structure;

Fig. 3 is a schematic structural view of the main optical fiber;

Fig. 4 is a schematic diagram of branch optical fiber structure;

Figure 5 is a schematic diagram of the latch structure;

Fig. 6 establishes the schematic diagram of optical branching;

Figure 7 is a schematic diagram of dismantling the optical branch;

Detailed ways

A preferred embodiment of the present invention is: referring to Fig. 1～Fig. 7, this plastic optical fiber coupler comprises main optical fiber, branch optical fiber, switch plug, sliding block and installation box, is characterized in that main optical fiber is on the section in the installation box There are 3 V-shaped grooves, and there are 3 slide blocks that slide and match on the installation box. A branch fiber and a switch pin are fixedly inserted on each slide block. The end of the branch fiber and the head of the switch pin are both The V-shaped head that matches the V-shaped groove on the main fiber, the light-facing slope of the branch fiber V-shaped head is coated with metal reflective film, the connecting surface of the switch pin body and the head is coated with metal reflective film, and the sliding block and installation The chute on the box slides and matches, and the displacement positioning of the sliding block should ensure that: when the sliding branch optical fiber is stopped, the V-shaped head of the switch pin coincides with the V-shaped groove of the main optical fiber; When stopping, the V-shaped head of the branch fiber just coincides with the V-shaped groove of the main fiber. The main optical fiber and the branch optical fiber adopt plastic optical fiber with a core diameter of 1mm and a step-refractive index distribution.

1. Preparation of main fiber and branches

In the direction perpendicular to the main optical fiber 1, engrave N V-shaped notches 6 with a groove angle of 45 degrees. One end of the branch optical fiber 2 is cut into a shape consistent with the size and shape of the notch 6 of the main optical fiber 1, and a highly reflective metal film 7 is coated on the end surface thereof.

2. The structure and preparation of the switch pin

The head of the switch plug 3 is made of the same material as the optical fiber, its size and shape are consistent with the notch on the main optical fiber, and its end face is plated with a highly reflective metal film 8 .

3. Structure and preparation of sliding module and installation box

The sliding block 4 and the installation box 5 can be made of polymer or metal. A plurality of notches are provided on the installation box 5, and each notch is used to install a sliding block 4. In order to limit the sliding block 4 to slide back and forth on the notch to avoid moving up and down, the notch is designed as a wedge-shaped structure, and at the same time, the sliding The edge of block 4 is designed as a wedge-shaped head structure matching the wedge-shaped notch on the installation box. Two round holes are provided on both sides of the installation box, and the diameter of the holes is the same as that of the main optical fiber 1 for installing the main optical fiber 1 .

5. Coupler installation

The main fiber 1 is inserted into the installation box 5 through the round hole on the top of the installation box, the notch 6 on the main fiber 1 is aligned with the chute on the top of the installation box 5, and the sliding block 4 is inserted into the installation box along the wedge-shaped chute on the installation box 5. Then, insert the branch fiber 2 and the switch pin 3 into the sliding block 4. The depth and direction of insertion should be based on the coincidence between the end of the branch fiber 2 and the head 13 of the switch pin 3 and the notch 6 on the main fiber 1. Finally Fix the branch optical fiber 2 and the switch pin 3 on the sliding block 4 with glue.

When the sliding block 4 slides to the end of one end along the groove, the branch optical fiber 2 should coincide with the notch 6 of the main optical fiber to realize the establishment of the branch optical path. 3 should just coincide with the notch 6 of the main optical fiber 1 to realize the removal of the branch optical path, and this position is set to "OFF".

working principle:

The working principle of establishing the branch optical path of the coupler is shown in FIG. 6 . When it is necessary to branch an optical path, slide the sliding block 4 to the "open" position. At this time, the end face of the branch fiber 2 and the main fiber 1 coincides with the notch 6, and the light 9 transmitted in the main fiber 1 passes through the notch 6 on the branch fiber 2. The metal film 7 is reflected, and the reflected light 10 enters the branch optical fiber 2 to realize the establishment of the branch optical path.

The working principle of removing the branch optical path of the coupler is shown in FIG. 7 . When it is necessary to remove a branch optical path, slide the slider 4 to the "off" position, at this time the end face of the switch pin 3 coincides with the notch 6 of the main optical fiber 1, and at this time the light transmitted to the notch 6 in the main optical fiber 1 11. Reflected by the metal film 8 on the switch pin 3, the reflected light 12 is reflected back into the main optical fiber 1 to realize the removal of the branch optical path.

Claims (3)

1. moving plastic optical fibre coupler, comprise main fiber (1), branch optical fiber (2), switch latch (3), sliding shoe (4) and mounting box (5), it is characterized in that on the section of main fiber (1) in mounting box (5) N V-shaped groove (6) being arranged, the N piece sliding shoe (4) that the coupling of sliding is arranged on the mounting box (5), each sliding shoe (4) is gone up a fixing branch optical fiber (2) and the switch latch (3) of pegging graft, the head (13) of the end of branch optical fiber (2) and switch latch (3) be with main fiber (1) on the coincide V-arrangement head of coupling of V-shaped groove (6), branch optical fiber (2) V-arrangement head meet light inclined-plane metal lining reflectance coating (7), the shank of switch latch (3) and head (13) joint face metal lining reflectance coating (8), sliding shoe (4) mates with the chute slip on the mounting box (5), the displacement location of sliding shoe (4) should be guaranteed: when slippage branch optical fiber (2) during by stop, head (13) the V-arrangement head of switch latch (3) just in time coincide with the V-shaped groove (6) of main fiber (1); When slippage switch latch (3) during by stop, the V-arrangement head of branch optical fiber (2) just in time coincide with the V-shaped groove (6) of main fiber (1).

2. moving plastic optical fibre coupler according to claim 1, the V-arrangement head that it is characterized in that branch optical fiber (2) and switch latch (3) are that right cylinder forms angled end-face with the tangent plane that axially becomes miter angle; V-shaped groove on the main fiber (1) is the grooving that becomes the two tangent planes formation of vertical and miter angle with the main fiber axis.

3. moving plastic optical fibre coupler according to claim 1, its feature fit structure between the chute on sliding shoe (4) and the mounting box (5) is a wedge structure: sliding shoe (4) xsect is a swallow-tail form, with the swallowtail-shaped slide slip coupling of mounting box (5).

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