CN209746176U

CN209746176U - optical fiber bidirectional grating reflector based on SC joint

Info

Publication number: CN209746176U
Application number: CN201920701934.6U
Authority: CN
Inventors: 宋立; 陈震; 韩永涛
Original assignee: Changfei (wuhan) Optical Systems Co Ltd
Current assignee: Changfei (wuhan) Optical Systems Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2019-12-06
Anticipated expiration: 2029-05-16

Abstract

The embodiment of the utility model discloses an optical fiber bidirectional grating reflector based on an SC joint, which comprises an SC joint and an optical fiber; the optical fiber is penetrated into the SC joint; a fiber core of the optical fiber is provided with a first grating gate area and a second grating gate area, and the first grating gate area and the second grating gate area are arranged at intervals; the grating center reflection wavelengths of the first grating area and the second grating area are the same, the first grating area is used for reflecting the detection waveband optical signal input from the first direction, the second grating area is used for reflecting the detection waveband optical signal input from the second direction, and the first direction is opposite to the second direction. The utility model provides a two-way grating reflector of optic fibre based on SC connects the interval is provided with two grating grids on optic fibre core, can realize optic fibre two-way transmission path fault detection and location.

Description

Optical fiber bidirectional grating reflector based on SC joint

[ technical field ] A method for producing a semiconductor device

The utility model relates to a light passive device technical field especially relates to a two-way grating reflector of optic fibre based on SC connects.

[ background of the invention ]

With the implementation of fiber-to-the-home engineering, the coverage area of an optical network is larger and larger, and more users are involved, so that the method is particularly important for quickly and accurately monitoring and maintaining the fault of the whole optical network. At present, the fault, the position of the fault and the real-time feedback of the communication quality of the optical cable are found in time by adding a signal reflector at the front end of the quick connector.

as shown in fig. 1 and 2, the fiber grating reflector of the conventional SC splice is a unidirectional fiber reflector, that is, a section of fiber grating 11 is disposed on an optical fiber 10, and can detect an optical signal in a certain wavelength band input from one direction 21 of the SC splice 20, because of the wavelength selection of the fiber grating 11, the optical signal meeting the bragg condition will return along an input path, and if an input optical signal end can detect a fiber grating reflection peak in the wavelength band, it can be determined that the transmission path is normal.

however, the fiber grating reflector of the conventional SC joint can only reflect an optical signal at one end, and can only detect whether a transmission path in one direction is normal, and thus cannot detect and locate a fault of a bidirectional optical transmission path.

In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.

[ Utility model ] content

the utility model discloses the technical problem that will solve is: the problem that the existing unidirectional fiber grating reflector cannot realize the fault detection and positioning of an optical fiber bidirectional transmission path is solved.

The utility model adopts the following technical scheme:

In a first aspect, the utility model provides a two-way grating reflector of optic fibre based on SC connects, include: SC splice 200 and optical fiber 100;

The optical fiber 100 is inserted into the SC connector 200;

a fiber core 110 of the optical fiber 100 is provided with a first grating area 111 and a second grating area 112, and the first grating area 111 and the second grating area 112 are arranged at intervals;

the grating center reflection wavelengths of the first grating region 111 and the second grating region 112 are the same, the first grating region 111 is configured to reflect a detection waveband optical signal input from a first direction 220, the second grating region 112 is configured to reflect a detection waveband optical signal input from a second direction 230, and the first direction 220 is opposite to the second direction 230.

Preferably, the central reflection wavelength of the grating is 1625-1650 nm, and the wave band of the optical signal of the detection wave band is 1625-1650 nm.

Preferably, the optical signal in the detection band input from the first direction 220 comes from the optical fiber 100, and the optical signal in the detection band input from the second direction 230 comes from an optical fiber connector coupled to the SC connector 200.

Preferably, the optical fiber 100 includes a core 110, a cladding 120 and a coating 130 concentrically arranged from inside to outside.

Preferably, the optical fiber 100 is jacketed with a jacket.

Preferably, the optical fiber 100 is glued inside the SC fitting 200.

Preferably, the first grating region 111 and the second grating region 112 are manufactured in mirror symmetry with respect to a central axis 113.

Preferably, the optical fiber 100 has an outer diameter of 0.25 mm.

Preferably, the optical fiber 100 is inserted into the ferrule 210 of the SC connector 200.

Preferably, the first grating region 111 and the second grating region 112 are located inside the ferrule 210.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, has following beneficial effect: the embodiment of the utility model provides an optical fiber bidirectional grating reflector based on SC joint, which comprises an SC joint and an optical fiber; the optical fiber is penetrated into the SC joint; a fiber core of the optical fiber is provided with a first grating gate area and a second grating gate area, and the first grating gate area and the second grating gate area are arranged at intervals; the grating center reflection wavelengths of the first grating area and the second grating area are the same, the first grating area is used for reflecting the detection waveband optical signal input from the first direction, the second grating area is used for reflecting the detection waveband optical signal input from the second direction, and the first direction is opposite to the second direction. The utility model provides a two-way grating reflector of optic fibre based on SC connects the interval is provided with two grating grids on optic fibre core, can realize optic fibre two-way transmission path fault detection and location.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of a fiber grating reflector based on SC joints in the prior art;

FIG. 2 is a schematic diagram of a prior art single-direction input detection optical signal based on an SC splice fiber grating reflector;

Fig. 3 is a schematic structural diagram of an optical fiber grating of an optical fiber bidirectional grating reflector based on an SC joint according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of a bidirectional input detection optical signal of an optical fiber bidirectional grating reflector based on an SC splice according to an embodiment of the present invention.

[ detailed description ] embodiments

in order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The first embodiment is as follows:

The embodiment of the utility model provides a two-way grating reflector of optic fibre based on SC connects, as shown in fig. 3 and fig. 4, include: SC splice 200 and optical fiber 100;

The optical fiber 100 is inserted into the SC connector 200;

The working principle of the fiber bragg grating reflector is that when an optical measurement system inputs a detection waveband optical signal to a fiber bragg grating positioned on an optical fiber through the optical fiber, the fiber bragg grating returns the detection waveband optical signal meeting a bragg condition along an input path, if the measurement system detects the detection waveband optical signal, the transmission path is proved to be normal, no optical fiber damage or breakage occurs, and other optical signals which do not meet the bragg condition normally pass through without affecting normal communication; if the detected band optical signal is not detected or the reflection value of the detected band optical signal is reduced, it indicates that the transmission path optical fiber is damaged or broken, and maintenance is required.

the utility model provides a two-way grating reflector of optic fibre based on SC connects, the interval is provided with first grating grid district and second grating grid district on the optic fibre core, and first grating grid district can realize launching the detection wave band light signal of first direction input, and second grating grid district can realize launching the detection wave band light signal of second direction input to reach and realize optic fibre bidirectional transmission path fault detection and location.

combine the embodiment of the utility model provides a, the grating center reflection wavelength of first grating zone 111 and second grating zone 112 is the same, and the detection wave band light signal that satisfies the Bragg condition will return along input path, and the detection wave band light signal that inputs first grating zone 111 from first direction 220 will return against first direction 220, and the detection wave band light signal that inputs second grating zone 112 from second direction 230 will return against second direction 230. In a specific embodiment, the central reflection wavelength of the grating is 1625-1650 nm, and the wave band of the optical signal in the detection wave band is 1625-1650 nm.

With reference to fig. 4, the optical signal of the detection band input from the first direction 220 comes from the optical fiber 100, and the optical signal of the detection band input from the second direction 230 comes from the optical fiber connector coupled with the SC connector 200.

With reference to fig. 3, the optical fiber 100 includes a fiber core 110, a cladding 120 and a coating layer 130, the fiber core 110, the cladding 120 and the coating layer 130 are concentrically disposed from inside to outside, and the coating layer 130 is used to protect the optical fiber 100 from mechanical damage. In a preferred embodiment, the portion of the optical fiber 100 outside the SC fitting 200 is jacketed with a jacket to protect the optical fiber 100 from mechanical damage. For stability of the position of threading the optical fiber 100 into the SC connector 200, the optical fiber 100 and the SC connector 200 are bonded together with glue, preferably epoxy glue. Preferably, the outer diameter of the optical fiber 100 is 0.25 mm.

With reference to fig. 3, in order to make the first grating area 111 reflect the optical signal in the detection band inputted from the first direction 220, the second grating area 112 reflects the optical signal in the detection band inputted from the second direction 230, and the first grating area 111 and the second grating area 112 are manufactured by mirror symmetry of the axial plane 113. The central axial plane 113 is a symmetrical reference plane of the first grating region 111 and the second grating region 112, and may be selected according to actual positions of the first grating region 111 and the second grating region 112 that need to be manufactured.

With reference to fig. 4, the optical fiber 100 penetrates into the ferrule 210 of the SC connector 200, and the optical fiber 100 and the ferrule 210 are sealed by epoxy resin adhesive. The first grating region 111 and the second grating region 112 are located inside the ferrule 210.

With the first embodiment of the present invention, the SC joint 200 is preferably an existing standard component, and those skilled in the art can know the specific structure of the SC joint 200 provided by the first embodiment of the present invention according to the existing standard SC joint structure. It should be noted that the SC fitting 200 may also be a retrofit version of an existing standard SC fitting.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An SC-splice based fiber bi-directional grating reflector, comprising: an SC splice (200) and an optical fiber (100);

The optical fiber (100) penetrates into the SC joint (200);

A fiber core (110) of the optical fiber (100) is provided with a first grating area (111) and a second grating area (112), and the first grating area (111) and the second grating area (112) are arranged at intervals;

The grating center reflection wavelengths of the first grating region (111) and the second grating region (112) are the same, the first grating region (111) is used for reflecting a detection waveband optical signal input from a first direction (220), the second grating region (112) is used for reflecting a detection waveband optical signal input from a second direction (230), and the first direction (220) and the second direction (230) are opposite.

2. The SC joint based optical fiber bidirectional grating reflector according to claim 1, wherein the central reflection wavelength of the grating is 1625-1650 nm, and the waveband of the detection waveband optical signal is 1625-1650 nm.

3. The SC splice based fiber bragg grating reflector of claim 1, wherein the detected band optical signal input from the first direction (220) is from the optical fiber (100) and the detected band optical signal input from the second direction (230) is from a fiber optic connector coupled to the SC splice (200).

4. The SC joint based optical fiber bi-directional grating reflector according to claim 1, wherein the optical fiber (100) comprises a core (110), a cladding (120) and a coating layer (130) concentrically arranged from inside to outside.

5. The SC splice based fiber bi-directional grating reflector according to claim 1, wherein said optical fiber (100) is jacketed with a sleeve.

6. The SC-splice based fiber bi-directional grating reflector according to claim 1, wherein the optical fiber (100) is glued inside the SC splice (200).

7. The SC-splice based fiber bi-directional grating reflector according to claim 1, wherein the first grating gate region (111) and the second grating gate region (112) are fabricated mirror-symmetrically with respect to a central axial plane (113).

8. The SC j oint-based fiber bragg grating reflector according to claim 1, wherein the optical fiber (100) has an outer diameter of 0.25 mm.

9. the SC splice based fiber bi-directional grating reflector according to claim 1, wherein the optical fiber (100) is threaded into a ferrule (210) of the SC splice (200).

10. the SC splice based fiber bi-directional grating reflector according to claim 9, wherein the first grating region (111) and the second grating region (112) are located inside the ferrule (210).