CN210180642U - Auxiliary tool for testing macrobending loss of optical fiber - Google Patents
Auxiliary tool for testing macrobending loss of optical fiber Download PDFInfo
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- CN210180642U CN210180642U CN201921221141.0U CN201921221141U CN210180642U CN 210180642 U CN210180642 U CN 210180642U CN 201921221141 U CN201921221141 U CN 201921221141U CN 210180642 U CN210180642 U CN 210180642U
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Abstract
The utility model discloses an auxiliary fixtures for optic fibre macrobend loss test, including bottom plate, optic fibre winding part and optic fibre fixed part, the bottom plate is used for providing fixed and support basis for optic fibre winding part and optic fibre fixed part, and optic fibre winding part is used for providing the bending operation of different bending diameters to the optic fibre that awaits measuring, and optic fibre fixed part is used for fixed optic fibre that awaits measuring, and wherein, the bottom plate edge has the chamfer, is equipped with 3 shifting chutes and 2 diagonal angle fixed orificess on the bottom plate. The auxiliary tool for the optical fiber macro-bending loss test avoids the self-twisting phenomenon generated when the optical fiber is wound in a unidirectional mode, eliminates part of test errors, and improves the test precision.
Description
The technical field is as follows:
the utility model relates to an optical fiber detection technique specifically says to an auxiliary fixtures that is used for optic fibre macrobend loss test.
Background art:
the optical fiber is widely used in the communication field due to its advantages of strong anti-interference performance, low transmission loss, light weight, corrosion resistance, reliable working performance and the like. However, in the process of cabling and use, bending is easily caused to cause the change of the state of an optical fiber waveguide structure, so that a base mode of an optical fiber transmission part is converted into a radiation mode, and additional macrobending loss is generated.
At present, the macro-bending loss of the optical fiber is generally tested by fixing a single end or double ends, using a single winding column to wind the optical fiber on the winding column for a plurality of times in a single direction, then fixing the optical fiber by using articles and measuring the optical fiber by using a PK2300 optical fiber analyzer, however, in the actual operation process, because the stress of the bent optical fiber bounces off, the torsion phenomenon generated after the unidirectional winding and the instability in the test process can generate new loss, and the reliability of the measurement result is reduced, but the macro-bending loss testing method is fundamentally lack of a testing tool which can be matched with the PK2300 optical fiber analyzer, so that the efficiency and convenience are insufficient in large-scale production measurement.
The utility model has the following contents:
the utility model aims to solve the technical problem that a avoid the phenomenon of twisting by oneself that optic fibre produced when one-way winding is provided, eliminate partial testing error, improve the auxiliary fixtures that are used for the test of the macrobend loss of optic fibre of measuring accuracy, lateral pressure has effectively been avoided to this frock, does not use the fixed winding form of external disturbance piece simultaneously, keeps optic fibre pine to wind naturally, has guaranteed optic fibre test state's stability, has improved detection efficiency.
The utility model provides an auxiliary tool for testing the macrobend loss of optical fiber, which comprises a bottom plate, an optical fiber winding part and an optical fiber fixing part, wherein the bottom plate is used for providing a fixing and supporting foundation for the optical fiber winding part and the optical fiber fixing part, the optical fiber winding part is used for providing bending operations with different bending diameters for the optical fiber to be tested, the optical fiber fixing part is used for fixing the optical fiber to be tested, wherein, the edge of the bottom plate is provided with a chamfer angle, the bottom plate is provided with 3 moving grooves and 2 diagonal fixing holes, the moving grooves are arranged in parallel at intervals along the length direction of the bottom plate, the optical fiber winding part comprises 3 groups of hollow core columns with different sizes and 6 moving rods, wherein, the core column of the same group comprises two core columns with the same size, the core column is matched with the moving rods to be connected with the moving grooves of the bottom plate in a semi-fixing mode and can, each moving groove is matched with a corresponding group of core columns; the optical fiber fixing component comprises two positioning rods, a first fixing block, a second fixing block and a fixing bolt, wherein the two positioning rods are located at the center of one end of the bottom plate and are arranged in a clearance mode, the second fixing block is fixedly connected with the first fixing block through the fixing bolt, a through hole through which an optical fiber to be detected can pass is formed in the clearance, corresponding to the two positioning rods, of the bottom end of the first fixing block, and the center of the clearance distance between the two positioning rods is located on the central axis of the through hole. The distance between two stems fixed in the same moving groove can be adjusted. The moving rod is a cylindrical structure, and the outer diameter of the moving rod is consistent with the inner diameter of the core column.
Preferably, the stem has an inner diameter corresponding to an outer diameter of the moving rod, and the moving rod is inserted through the stem from the moving groove of the bottom plate and locked by a nut.
Effectively, the distance between the outer surfaces of the two stems in the same moving groove is 400-500 um.
Preferably, the second fixing block is fastened to the base plate by bolts.
Preferably, the outer diameter of the stem in the three moving grooves is gradually reduced in a direction from one end of the bottom plate provided with the positioning rod to the other end.
Compared with the prior art after the scheme more than adopting, the utility model has the advantages of it is following:
(1) the utility model discloses utilize 2 diagonal angle fixed orificess to fix on optical fiber analyzer, when the macrobend loss of test optic fibre, optic fibre twines through "8 words" shape on two stem stems of device, has avoided the phenomenon of twisting by oneself that optic fibre produced when one-way winding, has eliminated partial test error, has improved the measuring accuracy.
(2) The utility model discloses when the macrobend loss of test optic fibre, through "8" font winding on two stem stems of optic fibre, because clearance between two stem stems is 400 sand with one's hair 500um, can avoid the lateral pressure to the optic fibre card in the clearance, do not use the fixed winding form of external disturbance spare simultaneously, keep optic fibre pine to wind naturally, guaranteed the stability of optic fibre test condition.
(3) Convenience: the tool is high in combination degree with a PK2300 optical fiber analyzer of the testing equipment, does not influence the PK2300 to be other detection items, and does not need to be frequently mounted and dismounted.
(4) High efficiency: when the optical fiber is sampled, the original sample of the PK2300 optical fiber analyzer test project can be used, additional sample preparation is not needed, and core columns with different sizes on the tool can be freely selected for macrobending loss detection.
Description of the drawings:
FIG. 1: the utility model discloses auxiliary fixtures's structure schematic diagram
FIG. 2: assembly schematic diagram of optical fiber analyzer and auxiliary tool
FIG. 3: the optical fiber winding state is schematically viewed from above.
The specific implementation mode is as follows:
the present invention will be further described with respect to the following detailed description:
the utility model provides an auxiliary fixtures for optic fibre macrobend loss test, as shown in fig. 1 and 2, includes bottom plate 1, optic fibre winding part and optic fibre fixed part, and bottom plate 1 is used for providing fixed and support basis for optic fibre winding part and optic fibre fixed part, and optic fibre winding part is used for providing the bending operation of different bending diameters to the optic fibre that awaits measuring, and optic fibre fixed part is used for fixed optic fibre that awaits measuring. Radian processing is done at 1 edge of bottom plate, is equipped with 3 shifting chutes 2 and 2 diagonal fixed orificess 3 on the bottom plate 1, and shifting chute 2 is parallel interval arrangement along bottom plate length direction. The moving groove 2 is used for connecting the sliding moving rod 5, and the diagonal fixing hole 3 is used for fixing the base plate 1 and the optical fiber analyzer 12. The bottom plate 1 is a stainless steel plate with 190 x 120mm chamfer radius of 2 mm. The size of the moving grooves 2 is 70 x 10mm, the distance between two adjacent moving grooves 2 is equal, and the diagonal fixing holes are phi 6.5mm and are arranged on one side of the bottom plate. Bottom plate 1 is according to PK2300 platform customization, and radian processing is done at 1 edge of bottom plate, guarantees that optic fibre links up the laminating between bottom plate 1 and the 12 mesa of fiber optic analysis appearance, and no buckling, fixed orifices 3 are used for fixing whole device on fiber optic analysis appearance. It should be noted that the fiber analyzer 2300 in this embodiment refers to a fiber analyzer manufactured by a photon dynamics, model 2300, which is a commercially available product and belongs to a well-known device in the industry.
And, the optical fiber winding part includes 3 sets of stems 4 and 6 moving rods 5 with different sizes, wherein the stem 4 of the same set includes two hollow stems with the same size, the stem 4 and the moving rod 5 are matched and connected with the moving groove of the bottom plate in a semi-fixed mode and can freely slide in the moving groove 3 of the bottom plate, and each moving groove 2 is matched with a corresponding set of stems 4. Thus, the distance between two stems fixed in the same moving groove can be adjusted. The moving rod 5 is a cylindrical structure with an outer diameter corresponding to the inner diameter of the stem. Wear out 2 movable rod 5 from bottom to top from the moving chute 2 below, every moving chute 2 is equipped with 2 movable rod 5, overlaps two stem 4 respectively on two movable rod 5, fixes and makes movable rod 5 can freely slide in moving chute 2 with nut 6 to adjust stem 4 clearance apart from the center and fixed part center on same central line. In this embodiment, the shifting chute is the protruding type and leads to the groove, the shifting chute diameter (phi is 6.0mm) at bottom plate top is less than the shifting chute diameter (phi is 10mm) of bottom plate bottom, correspondingly, the shifting rod is similar to the bolt design, namely the shifting rod includes the head (phi is not less than 5mm and not more than 10mm) of bottom and the pole portion (phi is 5.5mm) that is located the head top, the pole portion is 65 mm's of length cylinder, and upper end 15mm cylinder has screw thread (M5), during the use, with the body of rod up, the head is worn out the shifting rod from the shifting chute below (bottom plate bottom) from bottom to top down, the shifting rod head then is subject to shifting chute upper portion and makes whole shifting rod spacing in leading to the inslot. The core column 4 is a hollow cylinder with an inner diameter phi of 5.5mm and an outer diameter phi of different sizes (32 mm, 30mm, 20mm, 15mm and 10mm can be selected).
For convenient positioning, the inner diameter of the core column 4 is consistent with the outer diameter of the moving rod 5, and the moving rod 5 penetrates through the core column from the moving groove of the bottom plate upwards and is locked at the thread on the upper part of the moving rod by a nut. For better effect, the outer diameter of the core column in the three moving grooves is gradually reduced towards the other end direction from one end of the bottom plate provided with the positioning rod.
Preferably, the distance between the outer surfaces of the two stems in the same moving groove 2 is 400-500 um.
Preferably, the optical fiber fixing component comprises two positioning rods 7, a first fixing block 8, a second fixing block 9 and a fixing bolt 10, wherein the two positioning rods 7 are located at the center of one end of the bottom plate and are arranged in a clearance mode, the second fixing block 9 is fixedly connected with the first fixing block 8 through the fixing bolt 10, a through hole for the optical fiber to be detected to pass through is formed in the gap, corresponding to the two positioning rods, of the bottom end of the first fixing block 8, and the center of the gap distance between the two positioning rods is located on the central axis of the through hole. The second fixing block 9 is fastened to the bottom plate by bolts.
The method for measuring by adopting the auxiliary tool assembly and the optical fiber analyzer is implemented as follows:
firstly: the core columns 4 with different sizes are fixed by the movable rod 5 and the bottom plate 1 according to different optical fiber test requirements, if a plurality of core columns 4 are needed, the centers between the two core columns 4 and the centers between the two positioning rods 7 are ensured to be on the same central line, and the distance between the two core columns is controlled to be 400 microns and 500 microns.
Secondly, the method comprises the following steps: the assembled optical fiber macrobend loss detection auxiliary device is fixed on an optical fiber analyzer 12 through a diagonal fixing hole 3, so that the center between a positioning rod 7 and a core column 4 is on the same central line with an optical port 11 of the optical fiber analyzer 12.
Then: fixing two ends of a short optical fiber sample by using an optical fiber clamp, respectively placing the sample on two optical ports 11 of an optical fiber analyzer after end face treatment,
then: the optical fiber is wound by the winding "8" method, as shown in fig. 3. Optical fiber passes from locating lever 7 to and 8 apertures of first fixed block, and the clockwise circle pine winds 4 circles of stem on the left behind two stem centers, passes stem 4 centers, and the counterclockwise circle pine winds the stem circle on the right again, passes again behind the stem center with optical fiber attachment to optical fiber analyzer 12 fixed, and whole process need guarantee that optical fiber does not have unnecessary state of buckling. And loosening the optical fiber on the core columns with different diameters for different numbers of turns according to different test requirements.
And finally: and measuring the power spectrum of the optical fiber in a bending state by using an optical fiber analyzer, then loosening the bent optical fiber to restore the bent optical fiber to the original state along a central line, and measuring the power spectrum in an unbent state, thereby obtaining the macrobending loss value of the optical fiber under different wavelengths.
The foregoing is illustrative of the preferred embodiments of the present invention only, and is not to be construed as limiting the claims. All utilize the utility model discloses equivalent structure or equivalent flow transform that the specification was done all are included within the patent protection scope of the utility model.
Claims (5)
1. The utility model provides an auxiliary fixtures that is used for optic fibre macrobend loss test which characterized in that: the optical fiber winding component comprises 3 groups of hollow core columns with different sizes and 6 moving rods, wherein the core columns in the same group comprise two core columns with the same size, the core columns are matched with the moving rods to be connected with the moving grooves of the bottom plate in a semi-fixed mode and can freely slide in the moving grooves of the bottom plate, and each moving groove is matched with one group of core columns; the optical fiber fixing component comprises two positioning rods, a first fixing block, a second fixing block and a fixing bolt, wherein the two positioning rods are located at the center of one end of the bottom plate and are arranged in a clearance mode, the second fixing block is fixedly connected with the first fixing block through the fixing bolt, a through hole through which an optical fiber to be detected can pass is formed in the clearance, corresponding to the two positioning rods, of the bottom end of the first fixing block, and the center of the clearance distance between the two positioning rods is located on the central axis of the through hole.
2. The auxiliary tool for the macrobend loss test of the optical fiber according to claim 1, characterized in that: the inner diameter of the stem is consistent with the outer diameter of the moving rod, and the moving rod penetrates through the stem from the moving groove of the bottom plate upwards and is locked by a nut.
3. The auxiliary tool for the macrobend loss test of the optical fiber according to claim 1, characterized in that: the distance between the outer surfaces of the two stems in the same moving groove is 400-500 mu m.
4. The auxiliary tool for the macrobend loss test of the optical fiber according to claim 1, characterized in that: the second fixed block is fastened on the bottom plate through bolts.
5. The auxiliary tool for the macrobend loss test of the optical fiber according to claim 1, characterized in that: the outer diameter of the core column in the three moving grooves is gradually reduced along the direction from one end of the bottom plate provided with the positioning rod to the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921221141.0U CN210180642U (en) | 2019-07-31 | 2019-07-31 | Auxiliary tool for testing macrobending loss of optical fiber |
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| CN201921221141.0U CN210180642U (en) | 2019-07-31 | 2019-07-31 | Auxiliary tool for testing macrobending loss of optical fiber |
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| CN210180642U true CN210180642U (en) | 2020-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125113A (en) * | 2021-04-26 | 2021-07-16 | 杭州富通通信技术股份有限公司 | Macrobend device for optical fiber test |
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2019
- 2019-07-31 CN CN201921221141.0U patent/CN210180642U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125113A (en) * | 2021-04-26 | 2021-07-16 | 杭州富通通信技术股份有限公司 | Macrobend device for optical fiber test |
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