CN107271146A - The calibrating installation and equipment of optical fibre dispersion tester - Google Patents
The calibrating installation and equipment of optical fibre dispersion tester Download PDFInfo
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- CN107271146A CN107271146A CN201710412389.4A CN201710412389A CN107271146A CN 107271146 A CN107271146 A CN 107271146A CN 201710412389 A CN201710412389 A CN 201710412389A CN 107271146 A CN107271146 A CN 107271146A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
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- Optics & Photonics (AREA)
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Abstract
The invention discloses a kind of calibrating installation of optical fibre dispersion tester and equipment, the calibrating installation includes the fiber grating with the first length, and the fiber grating with the first length is the dispersion characteristics identical fiber grating with the standard fiber with the second length；Wherein, first length is not more than 20cm, and second length is not less than 10km.Using the embodiment of the present invention, the standard fiber that 10km is more than without using is measured, reduces volume, reduce weight, reduce cost and be easy to carry, use and produce in batches, improves Consumer's Experience.
Description
Technical field
The present invention relates to the calibrating installation and equipment of field of measuring techniques, more particularly to a kind of optical fibre dispersion tester.
Background technology
Optical fiber needs the parameter of metrology and measurement a lot, and major parameter includes luminous power, optical attenuation, attenuation coefficient, fibre ribbon
The parameters such as width, abbe number, index distribution, cutoff wavelength, mode field diameter, numerical aperture, heart footpath, circularity, concentricity.These
In parameter mainly：The intrinsic optical performance parameter of material, light-transfer characteristic parameter and physical dimension parameter etc..
The tester of current optical fiber parameter is commercially popularized already, but is due to practical optical fiber metrological standard unit
Scarcity, the domestic third-party institution does not carry out related service extensively always.For example when calibrating chromatic dispersion test instrument, using more than 10km's
Standard fiber reflects the common fault of optical fiber class measuring instrument metrological standard unit as metrological standard unit：Optical fiber length, cost
Height, is unfavorable for mass production；Volume is big, weight weight, is not easy to curstomer's site and carries out metering service work.
The content of the invention
The purpose of the embodiment of the present invention is to provide the calibrating installation and equipment of a kind of optical fibre dispersion tester, without using big
Measured in 10km standard fiber, effectively reduce the volume and weight of calibrating installation, be easy to carry, easy to use, drop
Low cost, and it is easy to batch production.
To achieve the above object, the embodiments of the invention provide a kind of calibrating installation of optical fibre dispersion tester, including tool
There is a fiber grating of the first length, the fiber grating with the first length is the color with the standard fiber with the second length
Dissipate characteristic identical fiber grating；
Wherein, first length is not more than 20cm, and second length is not less than 10km.
Compared with prior art, the calibrating installation of optical fibre dispersion tester disclosed by the invention is less than by using length
The technical scheme of the dispersion characteristics of 20cm standard fiber of the fiber grating simulation not less than 10km, is solved of the prior art
Calibrating installation need to using calibrating installation volume is big caused by standard fiber test dispersion of the length not less than 10km, weight weight, into
This high and not readily portable and Mass production problem, obtaining need not use the standard fiber more than 10km to be measured, subtracted
Small volume, the beneficial effect for reducing weight, reducing cost and be easy to carry, use and producing in batches.
Preferably, when second length is 10km, first length is 1cm~10cm.
Preferably, the calibrating installation also includes dependent variable control module, and the dependent variable control module includes temperature control
Device processed and dismountable fiber reel, the fiber reel are arranged with the standard fiber of the 3rd length, the fiber reel, the optical fiber light
Grid are connected in series by standard fiber；
The dependent variable control module be used for by the temperature controller control winding in the fiber reel with the
The temperature change of the standard fiber of three length is to change the dependent variable of the standard fiber with the 3rd length.Can so have
Imitate and the measurement function for measuring strain amount of optical fibre dispersion tester is calibrated.
Preferably, the 3rd length is not more than 1km.
Preferably, the calibrating installation also include fiber coupler and the first fiber optic loop, first fiber optic loop with it is described
Fiber coupler connects into closed circuit by standard fiber；
The optical fibre dispersion tester includes the first optical interface and the second optical interface, and it is defeated that the fiber coupler includes first
Enter end, the second input, the first output end and the second output end, the first input end passes through standard fiber and first light
Interface is connected, and first output end, fiber reel, the fiber grating are serially connected with second optical interface by standard fiber
Connect；
Second input is connected by standard fiber with one end of first fiber optic loop, and second output end is led to
The other end that standard fiber is crossed with first fiber optic loop is connected.
Preferably, the calibrating installation also includes the second fiber optic loop；The fiber coupler, fiber reel, the optical fiber light
Grid, second fiber optic loop are connected in series by standard fiber.
Preferably, the fiber coupler is 2*2 fiber couplers.
Preferably, first fiber optic loop is the fiber optic loop for the standard fiber for being arranged with the 4th length, the 4th length
No more than 1km；And/or, second fiber optic loop is the fiber optic loop for the standard fiber for being arranged with the 5th length, the 5th length
No more than 1km.
Preferably, the optical fibre dispersion tester is used for the one or more of parameter for testing optical fiber：Dispersion, loss,
Dependent variable, cutoff wavelength, index distribution and mode field diameter.
The embodiment of the present invention additionally provides a kind of equipment, includes the calibrating installation of described optical fibre dispersion tester.
Embodiments of the invention have the advantages that：A kind of calibration of optical fibre dispersion tester of the embodiment of the present invention
Device, can be with by the dispersion characteristics of standard fiber of the fiber grating simulation not less than 10km by 20cm is less than using length
The standard fiber more than 10km need not be used to be measured, reduce volume, reduce weight, reduce cost and be easy to take
Band, use and produce in batches；Secondly, by increasing dependent variable control module, the temperature of fiber reel is controlled by temperature controller
Change judges the dependent variable of fiber reel with to the dependent variable parameter testing function of optical fibre dispersion tester progress school to change optical fiber
Standard, this avoid use the caused volume of mechanical stretching method calibration big, complicated and be not easy to curstomer's site to open
The problem of opening up gage work, has reached convenient and practical beneficial effect, has improved Consumer's Experience.
Brief description of the drawings
Fig. 1 is the calibrating installation of the embodiment of the present invention 1 and the attachment structure schematic diagram of optical fibre dispersion tester.
Fig. 2 is the 1cm fiber gratings and 10km standard fiber dispersion characteristics figures of the embodiment of the present invention 1.
Fig. 3 is the calibrating installation of the embodiment of the present invention 2 and the attachment structure schematic diagram of optical fibre dispersion tester.
Fig. 4 is the calibrating installation of the embodiment of the present invention 3 and the attachment structure schematic diagram of optical fibre dispersion tester.
Fig. 5 is the calibrating installation of the embodiment of the present invention 4 and the attachment structure schematic diagram of optical fibre dispersion tester.
Fig. 6 is the calibrating installation of the embodiment of the present invention 5 and the attachment structure schematic diagram of optical fibre dispersion tester.
Fig. 7 is the calibrating installation of the embodiment of the present invention 6 and the attachment structure schematic diagram of optical fibre dispersion tester.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Need to illustrate in advance, the standard fiber hereinafter mentioned is selected by standard meter when being for measuring
Measure every relevant parameter such as dispersion, loss, dependent variable, cutoff wavelength, index distribution and mode field diameter that device is obtained
The transmission performance of the optical fiber of data, the normative reference as actual test data in calibration process, and standard fiber is also optimal
's.When standard fiber is used for the connection of actual light path devices, its transmission loss can not considered.
Embodiment 1
It is the attachment structure of a kind of calibrating installation 1 and optical fibre dispersion tester 2 that the embodiment of the present invention 1 is provided referring to Fig. 1
Schematic diagram.
In the present embodiment, the calibrating installation 1 includes the fiber grating 11 with the first length, described to have the first length
The fiber grating 11 of degree is the dispersion characteristics identical fiber grating with the standard fiber with the second length, wherein the first length
No more than 20cm, second length is not less than 10km.
It should be noted that the first length wherein in the fiber grating 11 with the first length refers to fiber grating conduct
The length of one integral device.
The test function for being used to test dispersion parameters of optical fibre dispersion tester is calibrated using the calibrating installation 1
When, it is necessary to the optical interface for being used to launch optical signal of one end of fiber grating 11 and optical fibre dispersion tester 2 is connected, the other end
It is connected with the optical interface for being used to receive optical signal of optical fibre dispersion tester 2.
Specifically, in the present embodiment, by using the fiber grating of no more than 20cm length, and the fiber grating is made
With with the standard fiber identical dispersion characteristics not less than 10km, 20cm fiber grating mould is so not more than by using this
Intend the dispersion of the standard fiber not less than 10km, in the calibration to optical fibre dispersion tester to dispersion parameters, can replace
In generation, is not less than 10km standard fiber.The fiber grating 11 has high apodization performance and optical fibre refractivity modulation depth is deeper.
When second length is 10km, first length is 1cm~10cm.Such as, length has for 1cm or 10cm fiber grating
There are the standard fiber identical dispersion characteristics for 10km with length.As shown in Fig. 2 1cm fiber gratings are special with 10km fibre-optical dispersions
Property figure in, due to fiber grating Photonic Band λ ＜ λ B this while for the anomalous dispersion region, being adopted to meet in λ ＜ λ B relations, experiment
With DFB (Distributed Feedback Laser, distributed feedback laser) optical source wavelength 1550.6nm, fiber grating cloth
Glug wavelength is that λ B are 1552.1nm, by the Distributed Feedback Laser pulse of fiber grating broadening with passing through 10km fibre-optical dispersion broadenings
Unanimously.It is thus possible to greatly reduce the volume of the calibrating installation, reduce weight and cost, and it is easy to carry, uses and criticizes
Amount production, and it is easy to curstomer's site to carry out metering service work.For the selection of fiber grating length, do not limit here
In this, it can be selected according to actual conditions.
Embodiment 2
It is the attachment structure of a kind of optical fibre dispersion tester 2 and calibrating installation 1 that the embodiment of the present invention 2 is provided referring to Fig. 3
Schematic diagram.
The calibrating installation 1 of the optical fibre dispersion tester of the present embodiment has made further improvement on the basis of embodiment 1,
The improvement is that：The calibrating installation 1 also includes dependent variable control module 12, and the dependent variable control module 12 includes temperature
Controller 121 and dismountable fiber reel 122, the fiber reel 122 are arranged with the standard fiber of the 3rd length, the fiber reel
122nd, the fiber grating 11 is connected in series by standard fiber；The dependent variable control module 12 is used to pass through the temperature control
Device 121 processed controls the temperature change of the standard fiber with the 3rd length of winding in the fiber reel 122 to change the tool
There is the dependent variable of the standard fiber of the 3rd length.Can reach calibrating installation volume is diminished, it is simple in construction and easy to use
Beneficial effect.
Specifically, in the survey for strain parameter by the dependent variable control module 12 to optical fibre dispersion tester
When amount function is calibrated, it is only necessary to which one end of the dependent variable control module 12 is passed through into standard fiber and optical fibre dispersion tester
The 2 optical interface connection for being used to launch optical signal, and connect the light for being used to receive optical signal of optical fibre dispersion tester 2
Mouth is hanging.And in the test work(that is used to test dispersion parameters of the calibrating installation 1 by the present embodiment to optical fibre dispersion tester 2
Can be when being calibrated, it is necessary to by one end of fiber grating 11 and the optical interface for launching optical signal of optical fibre dispersion tester 2
Connection, the other end is connected with the optical interface for being used to receive optical signal of optical fibre dispersion tester 2.It is specific to carry out measurement and calibration
When, flexibly selection it can be handled for connected mode, however it is not limited to the connected mode in accompanying drawing.
In addition, when carrying out specific calibration measurement, the dependent variable control module 12 is controlled by the temperature controller 121
It is described with the 3rd length to change to make the temperature change of the standard fiber with the 3rd length of winding in the fiber reel 122
Standard fiber dependent variable.The temperature controller 121 have control heating and refrigeration function, it is possible to achieve temperature from
Dynamic regulation, the temperature range that can be adjusted is -50 DEG C~50 DEG C.Wherein, fibre strain amount Δ L/L=α Δ T, wherein α are heat
The coefficient of expansion is about 5*10- 7/ DEG C, Δ T is temperature change, so minimum strain amount is (Δ L/L) min=α Δ Tmin, in temperature
When degree change precision is 0.1 DEG C, controllable minimum strain amount is 0.1 μ ε.And range of strain is that optical fiber turns depending on maximum strain amount
Node location is changed, dependent variable exceedes at this | 3000 μ ε |.It is being used for the test function of strain parameter to optical fibre dispersion tester
In calibration process, temperature that temperature controller 121 controlled is altered in steps and strain testing instrument is read by actual requirement provides knot
Fruit is to complete gage work.
Wherein, the 3rd length is not more than 1km.Specific length is not limited to this, can be selected according to actual conditions.
Embodiment 3
The present embodiment has made further improvement on the basis of embodiment 1, thes improvement is that：As shown in figure 4, described
Calibrating installation 1 also includes the fiber optic loop 14 of fiber coupler 13 and first, first fiber optic loop 14 and the fiber coupler 13
Closed circuit is connected into by standard fiber.The optical fibre dispersion tester 2 includes the first optical interface 21 and the second optical interface 22,
The fiber coupler 13 includes first input end 131, the second input 132, the first output end 133 and the second output end 134,
The first input end 131 is connected by standard fiber with first optical interface 21, first output end 131, the light
Fine grating 11 is connected in series with second optical interface 22 by standard fiber；Second input 132 passes through standard fiber
It is connected with one end of first fiber optic loop 14, second output end 134 passes through standard fiber and first fiber optic loop 14
The other end connection.
In the present embodiment, when optical fibre dispersion tester 2 connects the first optical interface 21 and the second optical interface 22, first is passed through
Optical interface 21 launches optical signal, and optical signal is received by the second optical interface, can be used for test color to optical fibre dispersion tester
The test function for dissipating parameter is calibrated.
In addition, when optical fibre dispersion tester 2 is by the second 22 vacantly i.e. open circuit of optical interface, being launched by the first optical interface 21
Optical signal, now, the optical signal of transmitting are entered by the first input end 131 of fiber coupler 13, and in fiber coupler 13
The other end separate two ways of optical signals and exported respectively from the first output end 133 and the second output end 134, pass through the second output end
The optical signal of 134 outputs after the first fiber optic loop 14 by entering back into fiber coupler 13 so as to realize optical signal in optical fiber coupling
Continuous decay in the closed circuit of clutch and the first fiber optic loop composition, so that the multistage loss of Multipexer optical signal.Can be with
Realize and the test function of the loss parameter of optical fibre dispersion tester 2 is calibrated.
The fiber coupler is 2*2 fiber couplers, and first fiber optic loop is arranged with the standard fiber of the 4th length,
4th length is not more than 1km, such as can select 1km, and the selection of specific length is not limited to this, can be according to reality
Situation is selected.
Embodiment 4
As shown in figure 5, the present embodiment has made further improvement on the basis of embodiment 2, the improvement is that：It is described
Calibrating installation 1 also includes the fiber optic loop 14 of fiber coupler 13 and first, first fiber optic loop 14 and the fiber coupler 13
Closed circuit is connected into by standard fiber.First output end 131, fiber reel 122, the optical interface of the fiber grating 11 and second
22 are connected in series by standard fiber；Second input 132 is connected by standard fiber with one end of the first fiber optic loop 14, and second
Output end 134 is connected by standard fiber with the other end of the first fiber optic loop 14.
In the present embodiment, when optical fibre dispersion tester 2 connects the first optical interface 21 and the second optical interface 22, first is passed through
Optical interface 21 launches optical signal, and optical signal is received by the second optical interface, can be used for test color to optical fibre dispersion tester
The test function for dissipating parameter is calibrated.
In addition, when optical fibre dispersion tester 2 is by the second 22 vacantly i.e. open circuit of optical interface, being launched by the first optical interface 21
Optical signal, now, the optical signal of transmitting are entered by the first input end 131 of fiber coupler 13, and in fiber coupler 13
The other end separate two ways of optical signals and exported respectively from the first output end 133 and the second output end 134, pass through the second output end
The optical signal of 134 outputs after the first fiber optic loop 14 by entering back into fiber coupler 13 so as to realize optical signal in optical fiber coupling
Continuous decay in the closed circuit of clutch and the first fiber optic loop composition, so that the multistage loss of analog optical signal.It can realize
Test function to the loss parameter of optical fibre dispersion tester 2 is calibrated.It is also possible to be controlled by temperature controller 121
The temperature change of fiber reel 122 processed is used to calibrate the measurement function for strain parameter of optical fibre dispersion tester.With
Reach while the purpose that the measurement function for the measuring strain parameter to optical fibre dispersion tester and loss parameter is calibrated.
Embodiment 5
As shown in fig. 6, the present embodiment has made further improvement on the basis of embodiment 3, the improvement is that：It is described
Calibrating installation 1 also includes the second fiber optic loop 15.The fiber coupler 13, the fiber grating 11, second fiber optic loop 15
It is connected in series by standard fiber.
In the present embodiment, by increasing by the second fiber optic loop 15 to increase the range of the metering of the calibrating installation.Wherein,
Two fiber optic loops 15 are the fiber optic loop for the standard fiber for being arranged with the 5th length, and the 5th length is not more than 1km, such as this second
The length of fiber optic loop 15 can be 1km, and the selection for length is not limited to this, can be according to actual conditions depending on.
Embodiment 6
As shown in fig. 7, the present embodiment has made further improvement on the basis of embodiment 4, the improvement is that：It is described
Calibrating installation 1 also includes the second fiber optic loop 15.The fiber coupler 13, fiber reel 122, the fiber grating 11, described
Two fiber optic loops 15 are connected in series by standard fiber.
In the present embodiment, by increasing by the second fiber optic loop 15 to increase the range of the metering of the calibrating installation.Wherein,
Two fiber optic loops 15 are the fiber optic loop for the standard fiber for being arranged with the 5th length, and the 5th length is not more than 1km, such as this second
The length of fiber optic loop 15 can be 1km, and the selection for length is not limited to this, can be according to actual conditions depending on.
In addition, the optical fibre dispersion tester 2 is used for the one or more of parameter for testing optical fiber：Dispersion, loss, should
Variable, cutoff wavelength, index distribution and mode field diameter.
In another embodiment of the invention, also disclose in a kind of equipment, including the ￣ embodiments 6 of above-described embodiment 1 and appoint
The calibrating installation of optical fibre dispersion tester described in one embodiment.
The calibrating installation and equipment of the optical fibre dispersion tester of the embodiment of the present invention, by will be less than 20cm's using length
The dispersion characteristics of standard fiber of the fiber grating simulation not less than 10km, can need not use the standard fiber more than 10km to carry out
Measure, reduce volume, reduce weight, reduce cost and be easy to carry, use and produce in batches；Secondly, by increasing
Plus dependent variable control module, control the temperature change of fiber reel to change the strain that optical fiber judges fiber reel by temperature controller
Amount is calibrated with the dependent variable parameter testing function to optical fibre dispersion tester, and this avoid using mechanical stretching method school
Volume is big, complicated caused by accurate and is not easy to the problem of curstomer's site carries out gage work, has reached convenient and practical
Beneficial effect, improve Consumer's Experience.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of calibrating installation of optical fibre dispersion tester, it is characterised in that the calibrating installation is included with the first length
Fiber grating, the fiber grating with the first length is the dispersion characteristics identical with the standard fiber with the second length
Fiber grating；
Wherein, first length is not more than 20cm, and second length is not less than 10km.
2. the calibrating installation of optical fibre dispersion tester as claimed in claim 1, it is characterised in that be in second length
During 10km, first length is 1cm~10cm.
3. the calibrating installation of optical fibre dispersion tester as claimed in claim 1, it is characterised in that the calibrating installation also includes
Dependent variable control module, the dependent variable control module include temperature controller and dismountable fiber reel, the fiber reel around
Standard fiber provided with the 3rd length, the fiber reel, the fiber grating are connected in series by standard fiber；
The dependent variable control module is used for having the 3rd to grow by what the temperature controller controlled winding in the fiber reel
The temperature change of the standard fiber of degree is to change the dependent variable of the standard fiber with the 3rd length.
4. the calibrating installation of optical fibre dispersion tester as claimed in claim 3, it is characterised in that the 3rd length is not more than 1km.
5. the calibrating installation of the optical fibre dispersion tester as described in claim 1 or 3, it is characterised in that the calibrating installation is also
Including fiber coupler and the first fiber optic loop, first fiber optic loop is connected into the fiber coupler by standard fiber closes
Cyclization road；
The optical fibre dispersion tester includes the first optical interface and the second optical interface, and the fiber coupler includes the first input
End, the second input, the first output end and the second output end, the first input end are connect by standard fiber with first light
Mouth connection, first output end, fiber reel, the fiber grating are serially connected with second optical interface by standard fiber
Connect；
Second input is connected by standard fiber with one end of first fiber optic loop, and second output end passes through mark
Quasi-fiber is connected with the other end of first fiber optic loop.
6. the calibrating installation of optical fibre dispersion tester as claimed in claim 5, it is characterised in that the calibrating installation also includes
Second fiber optic loop；The fiber coupler, fiber reel, the fiber grating, second fiber optic loop are serial by standard fiber
Connection.
7. the calibrating installation of optical fibre dispersion tester as claimed in claim 5, it is characterised in that the fiber coupler is 2*
2 fiber couplers.
8. the calibrating installation of optical fibre dispersion tester as claimed in claim 6, it is characterised in that first fiber optic loop be around
The fiber optic loop of standard fiber provided with the 4th length, the 4th length is not more than 1km；And/or, second fiber optic loop be around
The fiber optic loop of standard fiber provided with the 5th length, the 5th length is not more than 1km.
9. the calibrating installation of the optical fibre dispersion tester as shown in claim 6, it is characterised in that the optical fibre dispersion tester
One or more of parameter for testing optical fiber：Dispersion, loss, dependent variable, cutoff wavelength, index distribution and mould field are straight
Footpath.
10. a kind of equipment, it is characterised in that include the school of the optical fibre dispersion tester as described in claim 1-9 any one
Standard apparatus.
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Address after: No. 8 Qishan Road, Shiqi Town, Panyu District, Guangzhou City, Guangdong Province, 510000, 150 Patentee after: Radio and TV Measurement and Testing Group Co.,Ltd. Address before: 510630 Xiping Road, Whampoa Road, Tianhe District, Guangzhou, Guangdong 163 Patentee before: GUANGZHOU GRG METROLOGY & TEST Co.,Ltd. |