CN206556842U - LiNbO3 phase-modulator performance detecting systems - Google Patents
LiNbO3 phase-modulator performance detecting systems Download PDFInfo
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- CN206556842U CN206556842U CN201720174990.XU CN201720174990U CN206556842U CN 206556842 U CN206556842 U CN 206556842U CN 201720174990 U CN201720174990 U CN 201720174990U CN 206556842 U CN206556842 U CN 206556842U
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Abstract
LiNbO3 phase-modulator performance detecting systems described in the utility model embodiment, the linearly polarized light that polarised light output element is exported backtracking after LiNbO3 phase-modulators to be measured, polarization-maintaining fiber coil, sensing element, the linearly polarized light after return is interfered；Interference light intensity is detected by detector, and obtains electric signal corresponding with the interference light intensity；Signal processing unit, the electric signal that pick-up probe is sent obtains measuring current value after parsing；Error calculation unit, the measurement current value that receipt signal processing unit is sent is worth to the measurement error that LiNbO3 phase-modulators to be measured are introduced under local environment according to reference current value and measurement electric current.The precision of LiNbO3 phase-modulators can be reflected completely and accurately using such scheme, test result can be directly used for weighing its systematic function in FOCT, directly effective Technical Reference index is provided for the screening of LiNbO3 phase-modulators in FOCT.
Description
Technical field
The utility model is related to optoelectronic device technology field, and in particular to a kind of LiNbO3 phase-modulators performance detection
System.
Background technology
LiNbO3Phase-modulator be optical fiber current mutual inductor (Fiber Optic Current Transformer,
FOCT core component), is a kind of to improve system sensitivity and constant multiplier stability, so that increased in the optical path realize
The device of phase bias and closed loop feedback control function, LiNbO3Phase-modulator produces direct shadow to FOCT overall performance
Ring.
FOCT is to be based on Faraday magnetooptical effect and Ampere circuit law, and electricity in measured conductor is detected by optical fiber sensing ring
The size of stream, be specially：When have in measured conductor electric current by when, the left-handed and right-hand circular polarization transmitted in optical fiber sensing ring
The phase velocity of light changes in the opposite direction respectively, so that the phase difference (i.e. faraday's phase shift) for being proportional to size of current is produced,
Light path characteristic now is referred to as have nonreciprocity.This phase difference can be measured by interferometric method, and by photodetection
Interference light signal is changed into voltage signal output by device.According to the analysis to voltage signal, you can draw electric current in measured conductor
Size.Because output signal and phase difference caused by electric current meet cosine function relationship, to obtain high sensitivity, it will usually make
Apply biasing with phase-modulation, be allowed to be operated in the point that a response slope is not zero.FOCT generally uses Y type proton exchanges
LiNbO3Phase-modulator and vertical bar type Ti diffusions LiNbO3Phase-modulator.Due to LiNbO3In phase-modulator technique itself
Complexity, its influence to FOCT precision derives from multiple photoelectric parameters, such as insertion loss, polarization crosstalk, Polarization Dependent Loss
With half-wave voltage etc., the change that any one parameter occurs with environment and time can all introduce nonreciprocal phase in the optical path
Difference, the phase difference makes interference light signal change, and can not be distinguished with faraday's phase shift, thus introduces measurement error.
At present, traditional LiNbO3Phase-modulator detection method is that every photoelectric parameter of device is tested, example
Such as judged by the temperature characterisitic of insertion loss, polarization crosstalk, Polarization Dependent Loss and half-wave voltage and each parameter
LiNbO3The quality of phase-modulator, it is impossible to completely and accurately reflect LiNbO3Systematicness of the phase-modulator in FOCT
Can, thus directly effective Technical Reference index can not be provided for the screening of phase-modulator in FOCT.
Utility model content
In view of the above-mentioned problems, the utility model embodiment provides a kind of LiNbO3 phase-modulations based on FOCT light path principles
Device performance detecting system, examines performance parameter of the LiNbO3 phase-modulators under outside environmental excitation, is LiNbO3 in FOCT
The screening of phase-modulator provides directly effective Technical Reference index.
The utility model embodiment provides a kind of LiNbO3 phase-modulators performance detecting system, including：
Polarised light output element, its output end is connected with the input of LiNbO3 phase-modulators to be measured, described to be measured
The electric signal incoming end input modulating signal of LiNbO3 phase-modulators；
Polarization-maintaining fiber coil, its first end is connected with the output end of the LiNbO3 phase-modulators to be measured；
Reference current value in sensing element, induced electrified conductor, is connected with the second end of the polarization-maintaining fiber coil；It is described
The polarised light of polarised light output element output is through the LiNbO3 phase-modulators to be measured, the polarization-maintaining fiber coil, the sensitivity
Backtracking after element, the linearly polarized light after return is interfered；
Detector, detects interference light intensity, and obtain electric signal corresponding with the interference light intensity；
Signal processing unit, receives the electric signal that the detector is sent, and obtains measuring current value after parsing；
Error calculation unit, receives the measurement current value that the signal processing unit is sent, according to benchmark electricity
Flow valuve and the measurement electric current are worth to the measurement error that the LiNbO3 phase-modulators to be measured are introduced under local environment.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, the sensing element, including fiber optic loop with
It is described and being respectively arranged in the optical-fibre wave plate and speculum at the fiber optic loop two ends, the fiber optic loop has electrical conductor to pass through
Optical-fibre wave plate is connected with the second end of the polarization-maintaining fiber coil.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, the LiNbO3 phase-modulators to be measured
During for vertical bar type LiNbO3 phase-modulators, the polarised light output element includes light source, coupler and the polarizer, wherein：
The light that the light source is sent enters the polarizer input after the coupler, to produce linearly polarized light；
The input of the output end of the polarizer and the vertical bar type LiNbO3 phase-modulators uses 45 degree to shaft angle
Carry out welding；
The output end of the vertical bar type LiNbO3 phase-modulators is with the first end of the polarization-maintaining fiber coil using 0 degree to axle
Angle carries out welding.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, the LiNbO3 phase-modulators to be measured
During for Y type LiNbO3 phase-modulators, the polarised light output element includes light source and coupler, and the polarization-maintaining fiber coil
First end is connected by polarization beam combiner with the output end of the Y types LiNbO3 phase-modulators, wherein：
The light that the light source is sent is inputted to the coupler；
The output end of the coupler and the input of the Y types LiNbO3 phase-modulators are carried out using 0 degree to shaft angle
Welding；
One output end of the Y types LiNbO3 phase-modulators uses 0 with an input of the polarization beam combiner
Degree carries out welding to shaft angle, and another output ends of the Y types LiNbO3 phase-modulators is another with the polarization beam combiner
Individual input carries out welding using 90 degree to shaft angle；
The output end of the polarization beam combiner and the first end of the polarization-maintaining fiber coil use 0 degree to carry out welding to shaft angle.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, in addition to：
Environment generator, the LiNbO3 phase-modulators to be measured are placed in inside the environment generator, the environment hair
The control signal of raw device response host computer simulates the LiNbO3 phase-modulators local environment to be measured.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, it is described that the environment generator is simulated
LiNbO3 phase-modulators local environment to be measured includes：At least one of temperature, humidity, vibration, impact and irradiation.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, in addition to：
Current feedback circuit, output predetermined current to the electrical conductor；
Benchmark transformer, detects that the current feedback circuit exports the current value of predetermined current, as in the electrical conductor
Reference current value.
Alternatively, in above-mentioned LiNbO3 phase-modulator performance detecting systems, the error calculation unit obtains described
Reference current value in the electrical conductor of benchmark transformer detection, is obtained according to the reference current value and the measurement current value
The measurement error introduced to the LiNbO3 phase-modulators to be measured under local environment；
The error calculation unit sends the measurement error to the host computer.
LiNbO3 phase-modulator performance detecting systems described in the utility model embodiment, by polarizing light output member
Part, the linearly polarized light of polarised light output element output through the LiNbO3 phase-modulators to be measured, the polarization-maintaining fiber coil,
Backtracking after the sensing element, the linearly polarized light after return is interfered；Interference light intensity is detected by detector, and obtain with
The corresponding electric signal of the interference light intensity；Signal processing unit, receives the electric signal that the detector is sent, is surveyed after parsing
Measure current value；Error calculation unit, receives the measurement current value that the signal processing unit is sent, according to benchmark electricity
Flow valuve and the measurement electric current are worth to the measurement error that the LiNbO3 phase-modulators to be measured are introduced under local environment.
Transmission means of the light wave in said system is identical with optical transport mode in FOCT, therefore the performance of the measurement error finally given
Form of the form also with FOCT measurement errors is equivalent, and the such scheme provided using the utility model embodiment can be completely and accurate
The precision for reflecting LiNbO3 phase-modulators, and test result can be directly used for weighing its systematic function in FOCT,
Directly effective Technical Reference index is provided for the screening of LiNbO3 phase-modulators in FOCT.
Brief description of the drawings
Fig. 1 is the theory diagram of LiNbO3 phase-modulators performance detecting system described in the utility model one embodiment；
Fig. 2 is sensing element concrete structure schematic diagram described in the utility model one embodiment；
Fig. 3 is the structure of vertical bar type LiNbO3 phase-modulator performance detecting systems described in the utility model one embodiment
Schematic diagram；
Fig. 4 is that the structure of Y types LiNbO3 phase-modulator performance detecting systems described in the utility model one embodiment is shown
It is intended to；
Fig. 5 is the principle frame of LiNbO3 phase-modulator performance detecting systems described in the utility model another embodiment
Figure.
Embodiment
The utility model embodiment is further illustrated below in conjunction with accompanying drawing.
The present embodiment provides a kind of LiNbO3 phase-modulators performance detecting system, as shown in figure 1, including：
Polarised light output element 100, its output end is connected with the input of LiNbO3 phase-modulators 200 to be measured, and line is inclined
The light that shakes is inputted to the LiNbO3 phase-modulators 200 to be measured, and the electric signal of the LiNbO3 phase-modulators 200 to be measured is accessed
Input modulating signal is held, the modulated signal can be square-wave signal, sine wave signal etc..
Polarization-maintaining fiber coil 300, its first end is connected with the output end of the LiNbO3 phase-modulators 200 to be measured.
Reference current value in sensing element 400, induced electrified conductor, connects with the second end of the polarization-maintaining fiber coil 300
Connect, the linearly polarized light that polarised light output element 100 is exported is through the LiNbO3 phase-modulators 200 to be measured, the polarization maintaining optical fibre
Backtracking after ring 300, the sensing element 400, the linearly polarized light after return is interfered.
Detector 500, detects interference light intensity, and obtain electric signal corresponding with the interference light intensity, signal processing unit
600, the electric signal that the detector 500 is sent is received, obtains measuring current value after parsing.Detector 500 can change light intensity
For voltage signal corresponding with light intensity, the voltage signal that detector is exported can be converted to current signal by signal processing unit 600,
Because FOCT's, according to FOCT Cleaning Principles, also will by detecting current value in detection error, therefore the present embodiment
Interference light intensity is converted to final current value.
Error calculation unit 700, receives the measurement current value that the signal processing unit 600 is sent, according to described
Reference current value and the measurement electric current are worth to what the LiNbO3 phase-modulators 200 to be measured were introduced under local environment
Measurement error.The reference current value transformer measurement can be obtained on the basis of, be used as the base in the error calculation unit 700
Quasi- value.The measurement error can be obtained by the measurement current value with the reference current value according to default computation model, should
Default computation model is directly obtained according to FOCT measuring principles.And the local environment of LiNbO3 phase-modulators 200 to be measured is
For temperature, humidity, irradiation level etc., the LiNbO3 phase-modulators 200 to be measured can be placed in in environment parameters all
In highly stable laboratory, casing etc., and the parameters of required environment can be measured as given data in advance
Preserve, therefore when obtaining measurement error, you can measurement error is mapped with the parameters of environment.
Obviously, the light path built in said system, makes the transmission means of light wave identical with optical transport mode in FOCT, because
Form of the form of expression of this measurement error finally given also with FOCT measurement errors is equivalent, using the utility model embodiment
The such scheme energy of offer is complete and accurately reflects the precision of LiNbO3 phase-modulators, and test result can be directly used for
Its systematic function in FOCT is weighed, directly effective Technical Reference is provided for the screening of LiNbO3 phase-modulators in FOCT
Index.
As shown in Fig. 2 the sensing element 400 in such scheme, it may include fiber optic loop 401 and be respectively arranged at the light
There is electrical conductor to pass through in the optical-fibre wave plate 402 and speculum 403 at the fine two ends of ring 401, the fiber optic loop 401, the optical fiber ripple
Piece 402 is connected with the second end of the polarization-maintaining fiber coil 402；The linearly polarized light that the polarised light output element 100 is exported is through institute
LiNbO3 phase-modulators 200 to be measured, the polarization-maintaining fiber coil 300, the optical-fibre wave plate 402, the fiber optic loop 401 is stated to pass
It is defeated, by the speculum 403 reflect after return, the linearly polarized light after return interferes.The optical-fibre wave plate 401 can be selected
1/4 optical-fibre wave plate, the speculum 403 is faraday mirror, optical fiber metallic-membrane plating reflector, fiber optic patch speculum etc..
Further, the LiNbO3 phase-modulators 200 to be measured can also may be used for vertical bar type LiNbO3 phase-modulators
Think Y type LiNbO3 phase-modulators, a kind of company of light path is provided respectively for the LiNbO3 phase-modulators of both types
Connect mode.
As shown in figure 3, when the LiNbO3 phase-modulators 200 to be measured are vertical bar type LiNbO3 phase-modulators, institute
Stating polarised light output element 100 includes light source 101, coupler 102 and the polarizer 103, wherein：
The light that the light source 101 is sent enters the input of the polarizer 103 after the coupler 102, to produce line
Polarised light；The output end of the polarizer 103 and the input of the vertical bar type LiNbO3 phase-modulators 201 use 45 degree pairs
Shaft angle carries out welding, is adjusted so that the linearly polarized light is decomposed into after two bunch polarised lights to transmit to the vertical bar type LiNbO3 phases
Device 201 processed；The output end of the vertical bar type LiNbO3 phase-modulators 201 uses 0 with the first end of the polarization-maintaining fiber coil 300
Degree carries out welding to shaft angle, then the vertical bar type LiNbO3 phase-modulators 201 export two bunch polarised lights to the polarization-maintaining light
Fine ring 300, two bunch polarised lights are propagated along the fast axle and slow axis of the polarization-maintaining fiber coil 300 respectively.Signal transacting described in Fig. 3
Unit 600, is additionally operable to export result to error calculation unit 700, and signal processing unit 600 shown in figure can be produced
Modulated signal, the modulated signal is inputted to the electric signal incoming end of the vertical bar type LiNbO3 phase-modulators 201.
As shown in figure 4, when the LiNbO3 phase-modulators to be measured are Y type LiNbO3 phase-modulators, the polarised light
Output element 100 includes light source 101, coupler 102, and the first end of the polarization-maintaining fiber coil 300 passes through polarization beam combiner 800
It is connected with the output end of the Y types LiNbO3 phase-modulators 202, wherein：
The light that the light source 101 is sent is defeated with the Y types LiNbO3 phase-modulators 202 after the coupler 102
Enter end and carry out welding to shaft angle using 0 degree, light wave is into being polarized after Y type LiNbO3 phase-modulators 202 as linearly polarized light, so
After respectively enter Liang Ge branches；One output end of the Y types LiNbO3 phase-modulators 202 and the polarization beam combiner 800
An input using 0 degree to shaft angle carry out welding, another output end of the Y types LiNbO3 phase-modulators 202 and
Another input of the polarization beam combiner 800 carries out welding using 90 degree to shaft angle；So that into the polarization beam combiner
800 two bunch polarised lights are orthogonal；The output end of the polarization beam combiner 800 and the first end of the polarization-maintaining fiber coil 300 are adopted
Welding is carried out to shaft angle with 0 degree, two orthogonal bunch polarised lights enter the polarization-maintaining fiber coil, respectively along the polarization-maintaining fiber coil
Fast axle and slow axis propagate.
The core of the theory diagram of detecting system shown in Fig. 3 and Fig. 4, wherein light path system is, into polarization maintaining optical fibre
The light of ring 300 is two beam polarised lights, and light beam is propagated along fast axis propagation, light beam along slow axis, therefore no matter needs detection
LiNbO3 phase-modulators are vertical bar shaped or Y types, pass through light path design, the selection of photoelectric device, it is ensured that enter polarization maintaining optical fibre
Ring 300 for two beam polarised lights, you can realize the performance detection to LiNbO3 phase-modulators.
Further, such as Fig. 5, said system also includes environment generator 900, the LiNbO3 phase-modulators to be measured
200 are placed in inside the environment generator 900, and the control signal simulation of the response of environment generator 900 host computer 901 is described
The local environment of LiNbO3 phase-modulators 200 to be measured.Local environment includes：In temperature, humidity, vibration, impact and irradiation extremely
Few one kind.For example, the environment generator 900 can simulate single environment, analog temperature is carried out for example with temperature control box, is used
Humidifier controls humidity etc., it would however also be possible to employ environmental Kuznets Curves component with various environmental parameters regulatory function.The photoelectricity
Module is opto-electronic device in Fig. 3 or Fig. 4 and the module that is constituted according to its connected mode.
In above scheme, system can also include current feedback circuit 902, output predetermined current to the electrical conductor；Base
Quasi- transformer 903, detects that the current feedback circuit 902 exports the current value of predetermined current, is used as the base in the electrical conductor
Quasi- current value.The error calculation unit 700, obtains the reference current in the electrical conductor that the benchmark transformer 903 is detected
Value and the signal processing unit 600 parse the corresponding electric current of obtain described LiNbO3 phase-modulators local environment to be measured
It is worth to the measurement error；The error calculation unit 700 sends the measurement error to the host computer 902.Using this
System is to LiNbO to be measured3The step of phase-modulator performance detection is：
Complete LiNbO3Phase-modulator performance detecting system infrastructure is built, comprising：The output of current feedback circuit
End connects benchmark transformer and optical-electric module respectively, and the equal put-into error of the output end of benchmark transformer and optical-electric module calculates single
Member, the output end of error calculation unit is connected with host computer.By LiNbO to be measured3Phase-modulator is inputted and output tail optical fiber difference
According to the welding of mode shown in Fig. 3 or Fig. 4 and optical-electric module tail optical fiber, and LiNbO to be measured3The electric signal access of phase-modulator
The modulated signal output pin connection of stitch and signal processing unit.By LiNbO to be measured3Phase-modulator is placed in environment generator
In, and complete the connection of environment generator and host computer.Current feedback circuit is opened, by host computer, to signal processing unit
Output current value is demarcated, and is allowed to consistent with the output current value of benchmark transformer, i.e., do not produced in environment generator any
In the case of environmental excitation, the result that signal processing unit is obtained should be identical with reference current value.Pass through PC control ring
Border generator, is allowed to generation environment excitation, the measurement error knot exported by error calculation unit is read and preserved by host computer
Really, it is clear that this measurement error is LiNbO to be measured3What phase-modulator was introduced in the environment of being presently in.To avoid adding
Measurement error, when above test is carried out, in addition to environment generator internal environment, remaining environment should keep stable.
Inventive concept of the present utility model is exactly by FOCT light path systems, by LiNbO3Phase-modulator is in external environment condition
The comprehensive effect of photoelectric parameter drift under excitation is detected, and can be carried out in the form of FOCT measurement errors equivalent
Expression, to be used as measurement LiNbO3The reference index of phase-modulator quality.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from each embodiment technology of the utility model
The spirit and scope of scheme.
Claims (8)
1. a kind of LiNbO3 phase-modulators performance detecting system, it is characterised in that including：
Polarised light output element, its output end is connected with the input of LiNbO3 phase-modulators to be measured, the LiNbO3 to be measured
The electric signal incoming end input modulating signal of phase-modulator；
Polarization-maintaining fiber coil, its first end is connected with the output end of the LiNbO3 phase-modulators to be measured；
Reference current value in sensing element, induced electrified conductor, is connected with the second end of the polarization-maintaining fiber coil；The polarization
The polarised light of light output element output is through the LiNbO3 phase-modulators to be measured, the polarization-maintaining fiber coil, the sensing element
Backtracking afterwards, the linearly polarized light after return is interfered；
Detector, detects interference light intensity, and obtain electric signal corresponding with the interference light intensity；
Signal processing unit, receives the electric signal that the detector is sent, and obtains measuring current value after parsing；
Error calculation unit, receives the measurement current value that the signal processing unit is sent, according to the reference current value
And the measurement electric current is worth to the measurement error that the LiNbO3 phase-modulators to be measured are introduced under local environment.
2. LiNbO3 phase-modulators performance detecting system according to claim 1, it is characterised in that：
The sensing element, including fiber optic loop and the optical-fibre wave plate and speculum that are respectively arranged at the fiber optic loop two ends, institute
Stating in fiber optic loop has electrical conductor to pass through, and the optical-fibre wave plate is connected with the second end of the polarization-maintaining fiber coil.
3. LiNbO3 phase-modulators performance detecting system according to claim 2, it is characterised in that described to be measured
When LiNbO3 phase-modulators are vertical bar type LiNbO3 phase-modulators, the polarised light output element includes light source, coupler
And the polarizer, wherein：
The light that the light source is sent enters the polarizer input after the coupler, to produce linearly polarized light；
The output end of the polarizer and the input of the vertical bar type LiNbO3 phase-modulators are carried out using 45 degree to shaft angle
Welding；
The output end of the vertical bar type LiNbO3 phase-modulators is entered with the first end of the polarization-maintaining fiber coil using 0 degree to shaft angle
Row welding.
4. LiNbO3 phase-modulators performance detecting system according to claim 2, it is characterised in that described to be measured
When LiNbO3 phase-modulators are Y type LiNbO3 phase-modulators, the polarised light output element includes light source and coupler, and
The first end of the polarization-maintaining fiber coil is connected by polarization beam combiner with the output end of the Y types LiNbO3 phase-modulators, its
In：
The light that the light source is sent is inputted to the coupler；
The input of the output end of the coupler and the Y types LiNbO3 phase-modulators uses 0 degree to carry out welding to shaft angle；
One output end of the Y types LiNbO3 phase-modulators uses 0 degree pair with an input of the polarization beam combiner
Shaft angle carries out welding, and another of another output ends of the Y types LiNbO3 phase-modulators and the polarization beam combiner are defeated
Enter end and welding is carried out to shaft angle using 90 degree；
The output end of the polarization beam combiner and the first end of the polarization-maintaining fiber coil use 0 degree to carry out welding to shaft angle.
5. the LiNbO3 phase-modulator performance detecting systems according to claim any one of 1-4, it is characterised in that also wrap
Include：
Environment generator, the LiNbO3 phase-modulators to be measured are placed in inside the environment generator, the environment generator
The control signal for responding host computer simulates the LiNbO3 phase-modulators local environment to be measured.
6. LiNbO3 phase-modulators performance detecting system according to claim 5, it is characterised in that：
The LiNbO3 phase-modulators local environment to be measured of the environment generator simulation includes：Temperature, humidity, vibration,
At least one of impact and irradiation.
7. LiNbO3 phase-modulators performance detecting system according to claim 6, it is characterised in that also include：
Current feedback circuit, output predetermined current to the electrical conductor；
Benchmark transformer, detects that the current feedback circuit exports the current value of predetermined current, is used as the base in the electrical conductor
Quasi- current value.
8. LiNbO3 phase-modulators performance detecting system according to claim 7, it is characterised in that：
The error calculation unit, obtains the reference current value in the electrical conductor of the benchmark transformer detection, according to described
Reference current value and the measurement electric current are worth to the survey that the LiNbO3 phase-modulators to be measured are introduced under local environment
Measure error；
The error calculation unit sends the measurement error to the host computer.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768867A (en) * | 2017-02-24 | 2017-05-31 | 北京世维通光智能科技有限公司 | LiNbO3Phase-modulator performance detecting system |
| CN113218625A (en) * | 2021-03-05 | 2021-08-06 | 香港理工大学深圳研究院 | Standard phase detection element based on geometric phase super-structure surface |
-
2017
- 2017-02-24 CN CN201720174990.XU patent/CN206556842U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768867A (en) * | 2017-02-24 | 2017-05-31 | 北京世维通光智能科技有限公司 | LiNbO3Phase-modulator performance detecting system |
| CN106768867B (en) * | 2017-02-24 | 2023-09-12 | 北京世维通光智能科技有限公司 | LiNbO 3 Performance detection system for phase modulator |
| CN113218625A (en) * | 2021-03-05 | 2021-08-06 | 香港理工大学深圳研究院 | Standard phase detection element based on geometric phase super-structure surface |
| CN113218625B (en) * | 2021-03-05 | 2023-11-17 | 香港理工大学深圳研究院 | Standard phase detection element based on geometric phase super-structure surface |
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