CN201402330Y

CN201402330Y - Min-size optical splitter

Info

Publication number: CN201402330Y
Application number: CN2009201358920U
Authority: CN
Inventors: 孙传生
Original assignee: XFS COMMUNICATIONS (SHENZHEN) CO Ltd
Current assignee: XFS COMMUNICATIONS (SHENZHEN) CO Ltd
Priority date: 2009-03-27
Filing date: 2009-03-27
Publication date: 2010-02-10
Anticipated expiration: 2019-03-27

Abstract

The utility model discloses a min-size optical splitter which is widely applied in EPON networks and various circuit boards. The optical splitter comprises a splitter box body and a box bottom board,wherein a planar optical waveguide splitter (PLC) is transversely arranged in the splitter box body, the input end edge of the splitter box body is provided with a first transverse groove, an input casing is arranged in the first transverse groove, one end of the input casing is connected with one end of the optical splitter, and the other end thereof extends the outside, the output end edge of the splitter box body is provided with at least one second transverse groove, an output casing is arranged in the second transverse groove, and a bending resistant fiber can enter the input casing, andextends out of the output casing after passing through the optical splitter. As the bending resistant fiber can be wound in a large curvature, the volume of the optical splitter can be greatly reduced, and the weight is reduced therewith, thereby the installation and the maintenance are convenient, and the optical performances are excellent.

Description

Miniature optical branching device

Technical field

The utility model relates to the auxiliary body of optical fiber wiring, relates in particular to the lane assignment mechanism of the passive Ethernet of a kind of light (EPON).

Background technology

In June, 2004, passive type ether fiber optic network (Ethernet Passive Optical Network, EPON) by the standard (IEEE 802.3ah) of Institute of Electrical and Electric Engineers (IEEE), hold its low-cost advantage under the arm, the main flow that becomes the optical-fiber network wiring is rapidly selected.EPON is not for needing any fiberoptical networking to multiple spot that optical device constituted of power supply.Technology with optical fibre wavelength division multiplexer (WDM) realizes the point-to-multipoint two-way communication, the ether host-host protocol is introduced the access networking, finish one from the end points to the multi-endpoint, networking, the broadband environment of single host-host protocol and avoid handling conversion between various different agreements promotes the overall efficiency at networking.

As shown in Figure 1, a typical EPON system is made up of OLT, ONU and POS.Optowire terminal (OLT, Optical Line Terminal) centre machine room, optical network unit (ONU, Optical Network Unit) are placed near the network terminal interface unit or with it and are integrated.Passive fiber splitter (POS, Passive OpticalSplitter) is a passive component that connects OLT and ONU, and its function is: distribute descending data and concentrate up data.

Traditional POS utilizes to draw the external ordinary optic fibre encapsulation of bevel-type coupler (optical branching device) to form.Drawing the bevel-type optical branching device is to utilize fused fiber splice to draw awl to be made into the splitter of a 1*2, and the further again welding of the splitter of a plurality of 1*2 is drawn awl and made 2*4 or 4*8 or above shunt then.Like this, make the shunt on a 4*32 road, just need repeatedly welding to draw awl, owing to adopt ordinary optic fibre, bending radius is big simultaneously, causes the shunt after the encapsulation bulky, and inconvenience is installed, and is difficult in maintenance.Because through repeatedly welding, poor reliability can not adapt to the extreme weather environment, often break down in actual the use simultaneously.

Summary of the invention

The utility model is that existing passive optical branching device is bulky, installation and maintenance are inconvenient and reliability and the relatively poor technical matters of adaptability in order to solve, propose a kind of convenient for installation and maintenance, fiduciary level is high and volume is little, lightweight miniature optical branching device.

For solveing the technical problem, the technical scheme that the utility model proposes is a kind of miniature optical branching device of structure, and it comprises shunt box body, box body cover plate.Laterally be provided with a planar optical waveguide splitter (PLC Splitter) in the shunt box body, the input end limit of shunt box body has first transverse groove, be provided with the input sleeve pipe in this first transverse groove, an end of this input sleeve pipe is connected with an end of described optical branching device, the other end extends; The output terminal limit of shunt box body has at least one the second transverse grooves, is provided with the output sleeve pipe in this second transverse groove.Bend resistance optical fiber is entered by the input sleeve pipe,, go out by the output sleeve pipe again via optical branching device.

Wherein, the external part of described output sleeve pipe can be provided with joints of optical fibre joint.

Described input sleeve pipe can be one or two, and described second transverse groove is any structure of one to eight, can be provided with four output sleeve pipes in each second transverse groove.

Realize the universalness of fiber-to-the-home (FTTH), need to rely on the simplification construction method and reach, and optical branching device wherein need possess following characteristic: fiduciary level is good: optical branching device is returned and is studied carefully its failure cause, often externally goes between.Outside lead is exposed outside, does not have the casing protection, simultaneously need be under various complex environments installation wiring.For guaranteeing the reliability of shunt, at first want the high optical fiber of dependability.Volume is little, in light weight: optical branching device generally is installed in remote places such as roadside electric pole, open-air frame.Volume is little and in light weightly just seem extremely important, very convenient to carry.Install fast: need external power source when the characteristics of passive type assembly are to install, and the optical splitter device is built when putting out of doors, instrument that need not be extra and technology need only be operated indication, and pigtail splice is just plugged and can be used.

The optical branching device (Silica-based Planar Lightwave Circuit PLC optical splitters) that the utility model utilizes planar optical waveguide splitter (PLC) technology and bend resistance optical fiber to make takes into full account above-mentioned requirements, has following performance characteristics: be inserted into loss, hypopolarization loss and good wavelength flatness, loss is insensitive to optical wavelength transmission, can satisfy the transmission needs of different wave length; Compact conformation, volume is little, can be directly installed in the existing various cross-connecting box, does not need particular design; Adopt PLC technology and bend resistance optical fiber, single component divides path channels various, can expansion arbitrarily more than from 4 to 32 passages.

Description of drawings

Below in conjunction with drawings and Examples the utility model is made detailed explanation, wherein:

Fig. 1, Fig. 2 are the schematic perspective view of the utility model preferred embodiment shunt box body and cover plate;

Fig. 3, Fig. 4 are shunt box body and cover closure all-in-one-piece schematic perspective view;

Fig. 5, Fig. 6, Fig. 7 are front view, left view and the right view of the utility model preferred embodiment;

Fig. 8 unloads synoptic diagram behind the lower cover for Fig. 6.

Embodiment

Fig. 1 to Fig. 4 shows the basic structure of the utility model preferred embodiment, and described miniature optical branching device comprises the shunt box body 1 and the box body cover plate 2 of aluminium alloy.Please, laterally be provided with a planar optical waveguide splitter (PLC Splitter) 5 in the shunt box body 1 in conjunction with shown in Figure 8.The input end limit of shunt box body 1 has first transverse groove 3, is provided with two input sleeve pipes 4 in this first transverse groove, and an end of this input sleeve pipe is connected with the right-hand member of optical branching device 5, the other end extends; The output terminal limit of shunt box body I has eight second transverse grooves 8, is provided with four output sleeve pipes 6 in each second transverse groove.Two bend resistance optical fiber 7 are penetrated by input sleeve pipe 4, branch into 32, go out by output sleeve pipe 6 again via optical branching device 5.Output sleeve pipe 6 ends also are provided with joints of optical fibre joint 9.The utility model preferred embodiment can also be consulted Fig. 5, Fig. 6, Fig. 7.

As required, input sleeve pipe 4 is one or two, and second transverse groove 8 is any structure of one to eight, generally is provided with four output sleeve pipes 6 in each second transverse groove.Therefore, single component divides path channels various, can expand arbitrarily more than from 4 to 32 passages, for example, can form: the splitter of 1*8,1*16,1*32,2*8,2*16,2*32 or the like structure.

The cross-section structure of the bend resistance optical fiber that the utility model uses outwards is followed successively by glass core, glass coating, polymer coating, main coating, enhancement Layer and outer skin protective layer by core.This structured optical fiber be glass coating and main layer between added one deck high strength and bubble-tight polymer coating, make it have characteristics such as high strength, anti-bending, moisture-proof and heatproof, so adopt the optical fiber of this structure can be used for the very little occasion of radius-of-curvature, coiling that can deep camber can fracture damage yet, can guarantee communication quality again.Since bend resistance optical fiber can deep camber coiling, the volume of optical branching device then reduces greatly, weight alleviates thereupon, thereby makes convenient for installation and maintenancely, has splendid optical property again simultaneously, can extensively apply on EPON network and the various circuit board.

Claims

1, a kind of miniature optical branching device, comprise shunt box body (1), box body cover plate (2), it is characterized in that, laterally be provided with a planar optical waveguide splitter (PLC) in the described shunt box body (1), the input end limit of described shunt box body (1) has first transverse groove (3), be provided with input sleeve pipe (4) in this first transverse groove, an end of this input sleeve pipe is connected with an end of described optical branching device (5), the other end extends; The output terminal limit of shunt box body (1) has at least one the second transverse grooves (8), is provided with an output sleeve pipe (6) in this second transverse groove; Bend resistance optical fiber (7) is entered by described input sleeve pipe (4), via described optical branching device (5), goes out by described output sleeve pipe (6) again.

2, miniature optical branching device as claimed in claim 1 is characterized in that, the external part of described output sleeve pipe (6) is provided with joints of optical fibre joint (9).

3, miniature optical branching device as claimed in claim 2 is characterized in that, described input sleeve pipe (4) is one or two, and described second transverse groove (8) is any structure of one to eight, is provided with four output sleeve pipes (6) in each second transverse groove.

4, miniature optical branching device as claimed in claim 3 is characterized in that, the cross-section structure of described bend resistance optical fiber (7) outwards is followed successively by glass core, glass coating, polymer coating, main coating, enhancement Layer and outer skin protective layer by core.