CN207133364U - Field measurement device and system - Google Patents
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- CN207133364U CN207133364U CN201721135233.8U CN201721135233U CN207133364U CN 207133364 U CN207133364 U CN 207133364U CN 201721135233 U CN201721135233 U CN 201721135233U CN 207133364 U CN207133364 U CN 207133364U
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Abstract
The utility model provides a kind of field measurement device and system, and described device includes：Multiple lasers, for sending the first laser signal of preset wavelength to fiber waveguide electric-field sensor；With the one-to-one fiber waveguide electric-field sensor of the laser, the fiber waveguide electric-field sensor is used to produce direction and X-direction, Y-direction or Z-direction identical electric field in default three-dimensional system of coordinate, and the first laser signal is delivered in caused electric field, obtain second laser signal；Combiner device, for second laser signal described in multichannel to be combined, obtain combining laser signal；Photodetector, for generating electric field measurement signal according to the combining laser signal, so that external equipment determines the parameter of electric field X-direction, the Y-direction and the Z-direction described in the default three-dimensional system of coordinate according to the electric field measurement signal, the accuracy of measurement result is improved while device is simplified.
Description
Technical field
Photoelectron technical field is the utility model is related to, more particularly, to a kind of field measurement device and system.
Background technology
With the continuous development of photoelectron technology, application of the integrated optical device in electric field measurement is more and more extensive,
LiNbO3Integrated light guide Mach-Zehnder types electric-field sensor with its small volume, wide bandwidth, zero chirp, tested electric field is done
The advantage such as small is disturbed, turns into the preferred material of electric-field sensor making.
At present, LiNbO3The manufacture craft of integrated light guide is ripe, can make smaller, performance is lost both at home and abroad
Preferable LiNbO3Device is used to make LiNbO3Integrated light guide electric-field sensor, but the inconsistency due to manufacture craft and
The otherness of local environment, cause the multiple LiNbO made3The dc shift degree of integrated light guide electric-field sensor is different,
Needed when carrying out omnidirectional measurement electric field by each LiNbO3Integrated light guide electric-field sensor connects different tunable lasers
Device carries out the control of linear work point respectively, with ensure phase place change that dc shift brings sensor signal will not be exported and
Signal measurement has an impact.
However, above-mentioned omnidirectional measurement electric field equipment therefor is complicated, measurement process is complicated, and is related to being directed to each
The value of sensor output carries out reading and calculating respectively, easily causes error in reading and calculating process so that final survey
The deviation measured between result and actual value is larger.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of field measurement device and system, existing to alleviate
Complicated, complicated to electric field measurement process, measurement result inaccuracy the technical problem of field measurement device present in technology.
In a first aspect, the utility model embodiment provides a kind of field measurement device, including：
Multiple lasers, for sending the first laser signal of preset wavelength to fiber waveguide electric-field sensor；
With the one-to-one fiber waveguide electric-field sensor of the laser, the fiber waveguide electric-field sensor is used for the side of generation
To with X-direction, Y-direction or Z-direction identical electric field in default three-dimensional system of coordinate, and, the first laser signal is defeated
In electric field caused by delivering to, second laser signal is obtained；
Combiner device, for second laser signal described in multichannel to be combined, obtain combining laser signal；
Photodetector, for according to the combining laser signal generate electric field measurement signal so that external equipment according to
The electric field measurement signal determines the electric field X-direction, the Y-direction and Z described in the default three-dimensional system of coordinate
The parameter in direction.
With reference in a first aspect, the utility model embodiment provides the first possible embodiment of first aspect, its
In, described device also includes：With the one-to-one fiber coupling of combination of the laser and the fiber waveguide electric-field sensor
Device, the fiber coupler is used to carry out branch respectively to the second laser signal, wherein branch's laser signal conveys all the way
To the combiner device, another way branch laser signal is delivered to control module；Control module, for according to branch's laser
The power of signal generates the wavelength control instruction, and sends the wavelength control to the laser and instruct, so that described swash
Light device sends the first laser signal of preset wavelength.
With reference in a first aspect, the utility model embodiment provides second of possible embodiment of first aspect, its
In, for each fiber waveguide electric-field sensor, according to the straight wave guide of the fiber waveguide electric-field sensor and curved waveguide it
Between light phase difference when being equal to (2n-1) pi/2 with phase difference sum caused by dc shift the wavelength that determines generate wavelength control and refer to
Order, wherein, the n is positive integer.
With reference in a first aspect, the utility model embodiment provides the third possible embodiment of first aspect, its
In, described device also includes：Multiple length identical polarization maintaining optical fibres, the laser pass through with the fiber waveguide electric-field sensor
The polarization maintaining optical fibre connection.
With reference in a first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect, its
In, described device also includes：Multiple single-mode fibers of length identical first, the second single-mode fiber, the fiber coupler and institute
State combiner device to connect by first single-mode fiber, the combiner device is single by described second with the photodetector
Mode fiber connects.
With reference in a first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect, its
In, each the electrode structure of the fiber waveguide electric-field sensor is identical, interferometer optical waveguide structure is identical.
With reference in a first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect, its
In, the power output of the multiple laser is identical.
With reference in a first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect, its
In, each insertion of the port of the signal input part of the fiber coupler, the first signal output part and secondary signal output end
Loss, Polarization Dependent Loss are identical.
With reference in a first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect, its
In, a plurality of light path of the multiple laser, the multiple fiber waveguide electric-field sensor and the multiple fiber coupler composition
The optical path length of system is identical.
Second aspect, the utility model embodiment also provide a kind of electric field measurement system, including：As above-mentioned first aspect is appointed
Field measurement device described in one；External equipment, the external equipment electrically connect with the signal output part of the photodetector,
Electric field measurement signal for being exported to the photodetector is handled, to obtain the electric field in the default three-dimensional seat
The parameter of X-direction, the Y-direction and Z-direction in mark system.
The utility model embodiment brings following beneficial effect：By combiner device by multiple fiber waveguide electric-field sensors
The multi-path laser signal of output is synthesized, and obtains combining laser signal, then can be according to this using a photodetector
Combining laser signal generates electric field measurement signal, the electric field signal is transmitted to external equipment, so that external equipment is to the electric field
Relevant parameter measure.
The device carries out closing beam processing using combiner device to multi-path laser signal, is then forwarded to photodetector and outside
Equipment, simple in construction without setting photodetector and external equipment respectively for every road laser signal, measurement electric field only needs pair
Combining laser signal after multi-path laser signal conjunction beam measures, easy to the measurement process of electric field, and avoids existing skill
Because error caused by multiple reading and calculating causes the deviation between final measurement result and actual value larger in art.
Other feature and advantage of the present utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and obtained in book, claims and accompanying drawing.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of field measurement device structural representation that the utility model embodiment provides；
When Fig. 2 is that one kind that the utility model embodiment provides produces omnidirectional's electric field using three fiber waveguide electric-field sensors
Electrode putting position schematic diagram in space；
Fig. 3 is the LiNbO that the utility model embodiment provides3Integrated light guide Mach-Zehnder type electric-field sensors
Structural representation；
Fig. 4 is what the utility model embodiment providedWhen input signal and output signal and
When input signal and output signal.
Embodiment
To make the purpose, technical scheme and advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing to this
The technical scheme of utility model is clearly and completely described, it is clear that described embodiment is that the utility model part is real
Apply example, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belong to the scope of the utility model protection.
Field measurement device is complicated at present, measurement process is cumbersome, measurement result is inaccurate, and based on this, this practicality is new
A kind of field measurement device and system that type embodiment provides, can make field measurement device structure tend to simplify, measure
Journey is easy, and the accuracy of measurement result improves.
For ease of understanding the present embodiment, a kind of electric field measurement disclosed in the utility model embodiment is filled first
Put and describe in detail, Fig. 1 is a kind of field measurement device structural representation that the utility model embodiment provides.Such as Fig. 1 institutes
Show, the device includes：Multiple lasers 1, for sending the first laser signal of preset wavelength to fiber waveguide electric-field sensor 2；
With the one-to-one fiber waveguide electric-field sensor 2 of laser 1, fiber waveguide electric-field sensor 2 is used to produce direction and default three-dimensional
X-direction, Y-direction or Z-direction identical electric field in coordinate system, and, first laser signal is delivered in caused electric field,
Obtain second laser signal；Combiner device 4, for multichannel second laser signal to be combined, obtain combining laser signal；Light
Electric explorer 5, for generating electric field measurement signal according to combining laser signal, so that external equipment is true according to electric field measurement signal
Determine the parameter of electric field X-direction, Y-direction and Z-direction in default three-dimensional system of coordinate.
Specifically, in order to carry out omnidirectional measurement, it is necessary at least three lasers 1 and at least three fiber waveguides to electric field to be measured
Electric-field sensor 2 supports the use, and Fig. 1 gives the situation of three lasers 1 and three fiber waveguide electric-field sensors 2, three light
Waveguide electric-field sensor is respectively the first fiber waveguide electric-field sensor 2-1, the second fiber waveguide electric-field sensor 2-2 and the 3rd light wave
Conductive field sensor 2-3, is further described as example：Electrode is included inside three fiber waveguide electric-field sensors 2 respectively
Piece, have on electrode slice electric current by when, electrode slice can polarize, in order to realize inside fiber waveguide electric-field sensor respectively
X-direction, Y-direction and Z-direction identical electric field in direction and default three-dimensional system of coordinate are produced, it is necessary to polarization side according to electrode slice
It is vertically arranged two-by-two to by three fiber waveguide electric-field sensors, three lasers 1 are sent out to three fiber waveguide electric-field sensors 2 respectively
Three first laser signals of preset wavelength are sent, because the dc shift of three fiber waveguide electric-field sensors may be different, three
The preset wavelength for the first laser signal that laser is sent may be identical, it is also possible to and it is different, it can specifically be set according to actual conditions
Fixed, the utility model does not limit, the effect of electric field of each first laser signal in corresponding fiber waveguide electric-field sensor 2
Lower phase can be changed, and obtain three second laser signals, and three second laser signals are combined by combiner device 4,
Combining laser signal is obtained, combining laser signal is converted to electric field measurement signal by photodetector 5 and is sent to external equipment,
In order to which external equipment determines electric field X-direction, Y-direction and Z-direction in default three-dimensional system of coordinate according to electric field measurement signal
Parameter.
Specifically, one kind that Fig. 2, which is the utility model embodiment, to be provided is produced entirely using three fiber waveguide electric-field sensors
To the putting position schematic diagram in space of electrode during electric field.As shown in Fig. 2 the electrode structure of three fiber waveguide electric-field sensors point
Not Wei first electrode structure 21, second electrode structure 22 and three-electrode structure 23, wherein electrode structure 21 be used to producing with it is pre-
If X-direction identical electric field E in three-dimensional system of coordinateX, electrode structure 22 be used for produce it is identical with Y-direction in default three-dimensional system of coordinate
Electric field EY, electrode structure 23 is for producing E identical with Z-direction in default three-dimensional system of coordinateY。
Optionally, fiber waveguide electric-field sensor 2 can be Mach-Zehnder types LiNbO3Integrated light guide electric field sensing
Device.Fig. 3 gives Mach-Zehnder types LiNbO3The structural representation of integrated light guide electric-field sensor, as shown in figure 3,
LiNbO3Integrated light guide Mach-Zehnder type electric-field sensors include：LiNbO3Substrate 221, the interference of Mach-Zehnder types
The straight wave guide 222 of instrument, the bending straight wave guide 223 and electrode 224 of Mach-Zehnder type interferometers.In order to realize to each light wave
The measurement of the unknown electric field in space of conductive field sensor internal electrode sensing, should make electrode 224 be distributed in Mach-Zehnder types
The both sides of one of two waveguides caused by interferometer.Fig. 3 provides the situation that electrode 224 is distributed in the both sides of straight wave guide 223.Need to illustrate
, it is not to limit electrode 224 to be distributed in the both sides of straight wave guide 223 herein, the both sides that electrode 224 is distributed in curved waveguide are also
It can realize.
Device described in the utility model can also include：With a pair of the combination 1 of laser 1 and fiber waveguide electric-field sensor 2
The fiber coupler 3 answered, fiber coupler 3 is used to carry out branch respectively to second laser signal, wherein branch's laser is believed all the way
Number combiner device 4 is delivered to, another way branch laser signal is delivered to control module 8；Control module 8, in measurement electric field
Before, wavelength control instruction is generated according to the power of branch's laser signal, and wavelength control instruction is sent to laser 1, so as to swash
Light device 1 sends the first laser signal of preset wavelength.
For each fiber waveguide electric-field sensor 2, according between the straight wave guide and curved waveguide of fiber waveguide electric-field sensor 2
Light phase difference when being equal to (2n-1) pi/2 with phase difference sum caused by dc shift the wavelength that determines generate wavelength control and refer to
Order, wherein, the n is positive integer.
Specifically, the power output for setting three lasers 1 is all PIN, the first fiber waveguide electric-field sensor 2-1 straight wave guide
Between curved waveguide light phase difference with dc shift caused by phase difference sum bePower output is P1, electricity between electrode
Field is f (E to the knots modification of phase of light wave1), the light between the second fiber waveguide electric-field sensor 2-2 straight wave guide and curved waveguide
Phase difference is with phase difference sum caused by dc shiftPower output is P2, change of the electric field between electrodes to phase of light wave
Measure as f (E2), the light phase difference between the 3rd fiber waveguide electric-field sensor 2-3 straight wave guide and curved waveguide is produced with dc shift
Raw phase difference sum isPower output is P3, electric field between electrodes are f (E to the knots modification of phase of light wave3), light wave is conductive
The decay factor of field sensor 2 is α1, then above parameter following relational expression be present：
Can be seen that from (1) formula can produce light phase after first laser signal passes through fiber waveguide electric-field sensor 2
Difference, the light phase difference cause mainly due to the arm length difference between straight wave guide and curved waveguide, dc shift and electric field between electrodes
's.
Again because the fiber waveguide of fiber waveguide electric-field sensor 2 is unsymmetric structure, thenIt can distinguish
It is defined as：
Wherein Δ L is the arm length difference between the straight wave guide and curved waveguide of fiber waveguide electric-field sensor 2, NeffIt is having for light
Imitate refractive index, λ1、λ2、λ3It is the operation wavelength of three fiber waveguide electric-field sensors 2, f (x1)、f(x2)、f(x3) it is three light waves
Phase change caused by conductive field sensor dc shift, for specific its straight wave guide of fiber waveguide electric-field sensor 2 and bending
Arm length difference Δ L, the effective refractive index N of light between waveguideeffAnd phase difference caused by dc shift is all known, according to (2)
Formula can with obtain fiber waveguide electric-field sensor under specific operation wavelength due to the arm between straight wave guide and curved waveguide
Phase difference caused by long difference and dc shift, while the work of fiber waveguide electric-field sensor corresponding to specific phase difference can also be obtained
Make wavelength.
Specifically, before electric field is measured, export three fiber waveguide electric-field sensors 2 three second of fiber coupler 3
Laser signal carries out branch respectively, for each second laser signal, wherein branch's laser signal is delivered to light all the way
Bundling device 4, another way branch laser signal are delivered to control module 8 so that fiber waveguide electric-field sensor 2 transmit each the
A part for dual-laser signal power is transmitted to control module 8, and then causes the fraction of laser light signal of each second laser signal
Control module 8 is separately input into, control module 8 obtains the fraction of laser light signal of each second laser signal, due to straight wave guide
Phase difference caused by arm length difference and dc shift between curved waveguidePassed with each fiber waveguide electric field
The operation wavelength λ of sensor 21、λ2、λ3Between above-mentioned relation formula (2), according to relational expression (2) calculate send as an envoy toWith
Simultaneously equal to the wavelength X of (2n-1) pi/2 (n is positive integer)1、λ2And λ3Value, generation wavelength control instruction, and sent to laser 1
Wavelength control instructs, so that laser 1 sends the first laser signal of preset wavelength.
IfAsynchronously it is equal to (2n-1) pi/2, then situation as shown in Figure 4 occurs, Fig. 4 is provided
When input signal and output signal andWhen input signal and output signal, as shown in figure 4,
10 areWhen input signal, 20 be output signal now, and 30 areWhen input signal, 4 be now
Output signal, it can be seen that now output signal 20 is added counteracting with output signal 40, does not reach the mesh of detection electric field thus
.
When measuring electric field, because the modulation depth of fiber waveguide electric-field sensor 2 is small, so f (E1)、f(E2)、f(E3)<<
1, then the power output of the three of the output of three fiber waveguide electric-field sensors 2 second laser signal can on the basis of (1) formula
Obtained with deformation：
Combiner device 4 is combined to three second laser signals, obtains combining laser signal, if combiner device 4 exports
The power output of combining laser signal is P, decay factor α2, then have with reference to (4) formula：
Influence of the electric field to laser signal that can be seen that from (5) formula in three fiber waveguide electric-field sensors 2 is embodied in f
(E1)、f(E2)、f(E3), combiner device 4 sends the combining laser signal to photodetector 5, and photodetector 5 is by combining
Laser signal is converted to electric field measurement signal, and specific Computing Principle is：If the gain of photodetector 5 is G, photodetector 5
The voltage signal of output is V, then has：
Due to f (E1)、f(E2)、f(E3) be represented by：
ω represents the frequency of tested electric field,Represent phase of the three road laser signals in whole transmitting procedure
Retardation, t are the laser signal transmission time, A1、A2、A3For the amplitude of three road laser signals.By (6) formula and (7) formula, photoelectricity is visited
Surveying the voltage signal V that device 5 exports can be further represented as：
Wherein,
Specifically, the signal that photodetector 5 exports just swashs for three tunnels second that three fiber waveguide electric-field sensors 2 export
The voltage signal that the combining laser signal of optical signal is generated, the voltage signal is sent to external equipment, external equipment
To be understood using (8) formula to tested electric field, the external equipment can be oscillograph, frequency spectrograph or other frequency-selecting equipment.
Device described in the utility model can also include：Multiple length identical polarization maintaining optical fibres 6, laser 1 and fiber waveguide
Electric-field sensor 2 is connected by polarization maintaining optical fibre 6.
Specifically, polarization maintaining optical fibre 6 is used to enter the first laser signal that laser 1 is sent to fiber waveguide electric-field sensor 2
Row protection so that first laser signal linear polarization in transmitting procedure keeps constant, improves the relevant of first laser signal
Signal to noise ratio.
Device described in the utility model can also include：Multiple length identical the first single-mode fibers 7, the second single-mode fiber
9, fiber coupler 3 is connected with combiner device 4 by first single-mode fiber 7, and combiner device 4 passes through with photodetector 5
Second single-mode fiber 9 connects.
In order to avoid due to the internal structure difference of multiple fiber waveguide electric-field sensors 2 produce direct current it is cheap, and then influence
The accuracy of measurement result, then require that the electrode structure of each fiber waveguide electric-field sensor 2 is identical, interferometer optical waveguide structure phase
Together.Below by illustrating how to, guarantee optical waveguide structure is identical：Take light wavelength lambda0=1.55 μm,Light
Effective refractive index Neff=2.1395, then have：
So ensure that the optical waveguide structure of three fiber waveguide electric-field sensors 2 is identical.
Further, the power output of multiple lasers 1 is identical, the signal input part of each fiber coupler 3, the first letter
Number output end is identical with insertion loss, the Polarization Dependent Loss of the port of secondary signal output end, multiple lasers 1, Duo Geguang
The optical path length for a plurality of light path system that waveguide electric-field sensor 2 and multiple fiber couplers 3 form is identical.
The utility model embodiment also provides a kind of electric field measurement system, including：Electricity as described in above-mentioned embodiment is any
Field measurement device；External equipment, external equipment electrically connect with the signal output part of photodetector 5, for photodetector 5
The electric field measurement signal of output is handled, to obtain electric field to be measured X-direction, the Y-direction and Z in default three-dimensional system of coordinate
The parameter in direction.
Optionally, the external equipment can be oscillograph, frequency spectrograph or other frequency-selecting equipment.
On the one hand multi-path laser signal that the utility model is exported multiple fiber waveguide electric-field sensors by combiner device
Synthesized, obtain combining laser signal, then generating electric field according to the combining laser signal using a photodetector surveys
Signal to be measured, the electric field signal is transmitted to external equipment, the relevant parameter of the electric field is measured, the apparatus structure is simple,
It is easy to the measurement process of electric field, and avoid in the prior art because error caused by multiple reading and calculating causes finally
Measurement result and actual value between deviation it is larger；On the other hand wavelength control is sent to laser by control module to refer to
Order so that laser produces the first laser signal of preset wavelength, solves the direct current offset brought due to environmental factor.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, are only
Described for the ease of description the utility model and simplifying, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical scheme of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing
The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill
For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme
Enclose, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model described should be wanted with right
The protection domain asked is defined.
Claims (10)
- A kind of 1. field measurement device, it is characterised in that including：Multiple lasers, for sending the first laser signal of preset wavelength to fiber waveguide electric-field sensor；With the one-to-one fiber waveguide electric-field sensor of the laser, the fiber waveguide electric-field sensor be used for produce direction with X-direction, Y-direction or Z-direction identical electric field in default three-dimensional system of coordinate, and, the first laser signal is delivered to In caused electric field, second laser signal is obtained；Combiner device, for second laser signal described in multichannel to be combined, obtain combining laser signal；Photodetector, for generating electric field measurement signal according to the combining laser signal, so that external equipment is according to Electric field measurement signal determines the electric field X-direction, the Y-direction and Z-direction described in the default three-dimensional system of coordinate Parameter.
- 2. a kind of field measurement device according to claim 1, it is characterised in that described device also includes：With the laser and the one-to-one fiber coupler of combination of the fiber waveguide electric-field sensor, the fiber coupling Device is used to carry out branch respectively to the second laser signal, wherein branch's laser signal is delivered to the combiner device all the way, Another way branch laser signal is delivered to control module；Control module, for before electric field is measured, generating the wavelength control according to the power of branch's laser signal and instructing, And send the wavelength control to the laser and instruct, so that the laser sends the first laser signal of preset wavelength.
- 3. a kind of field measurement device according to claim 2, it is characterised in that passed for each fiber waveguide electric field Sensor, according to caused by the light phase difference between the straight wave guide and curved waveguide of the fiber waveguide electric-field sensor with dc shift Phase difference sum is equal to the wavelength generation wavelength control instruction determined during (2n-1) pi/2, wherein, the n is positive integer.
- 4. a kind of field measurement device according to claim 3, it is characterised in that also include：Multiple length identicals are protected Polarisation is fine, and the laser is connected with the fiber waveguide electric-field sensor by the polarization maintaining optical fibre.
- 5. a kind of field measurement device according to claim 4, it is characterised in that also include：Multiple length identicals One single-mode fiber, the second single-mode fiber, the fiber coupler are connected with the combiner device by first single-mode fiber, The combiner device is connected with the photodetector by second single-mode fiber.
- A kind of 6. field measurement device according to claim 1, it is characterised in that each fiber waveguide electric-field sensor Electrode structure is identical, interferometer optical waveguide structure is identical.
- A kind of 7. field measurement device according to claim 1, it is characterised in that the power output of the multiple laser It is identical.
- A kind of 8. field measurement device according to claim 2, it is characterised in that the signal of each fiber coupler Input, the first signal output part are identical with insertion loss, the Polarization Dependent Loss of the port of secondary signal output end.
- 9. a kind of field measurement device according to claim 2, it is characterised in that the multiple laser, the multiple The optical path length of a plurality of light path system of fiber waveguide electric-field sensor and the multiple fiber coupler composition is identical.
- A kind of 10. electric field measurement system, it is characterised in that including：Field measurement device as described in claim 1-9 is any；External equipment, the external equipment electrically connect with the signal output part of the photodetector, for being visited to the photoelectricity The electric field measurement signal for surveying device output is handled, to obtain electric field X-direction, described in the default three-dimensional system of coordinate The parameter of Y-direction and Z-direction.
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| CN201721135233.8U CN207133364U (en) | 2017-09-05 | 2017-09-05 | Field measurement device and system |
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| CN201721135233.8U CN207133364U (en) | 2017-09-05 | 2017-09-05 | Field measurement device and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505510A (en) * | 2017-09-05 | 2017-12-22 | 北京森馥科技股份有限公司 | Field measurement device and system |
| CN109406889A (en) * | 2018-11-06 | 2019-03-01 | 中国科学院电工研究所 | A kind of field measurement device |
| RU210427U1 (en) * | 2022-01-24 | 2022-04-15 | Федеральное государственное автономное образовательное учреждение высшего образования "Омский государственный технический университет" | Double sensor for measuring electric field strength with clamp-on sensing elements |
-
2017
- 2017-09-05 CN CN201721135233.8U patent/CN207133364U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505510A (en) * | 2017-09-05 | 2017-12-22 | 北京森馥科技股份有限公司 | Field measurement device and system |
| CN109406889A (en) * | 2018-11-06 | 2019-03-01 | 中国科学院电工研究所 | A kind of field measurement device |
| RU210427U1 (en) * | 2022-01-24 | 2022-04-15 | Федеральное государственное автономное образовательное учреждение высшего образования "Омский государственный технический университет" | Double sensor for measuring electric field strength with clamp-on sensing elements |
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