CN108761848A - A kind of all -fiber electro-optic modulation system - Google Patents
A kind of all -fiber electro-optic modulation system Download PDFInfo
- Publication number
- CN108761848A CN108761848A CN201810407506.2A CN201810407506A CN108761848A CN 108761848 A CN108761848 A CN 108761848A CN 201810407506 A CN201810407506 A CN 201810407506A CN 108761848 A CN108761848 A CN 108761848A
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- Prior art keywords
- optical fiber
- bicone
- ionic liquid
- type groove
- fiber
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/0009—Materials therefor
- G02F1/0018—Electro-optical materials
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/011—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour in optical waveguides, not otherwise provided for in this subclass
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The present invention relates to a kind of all -fiber electro-optic modulation system, including ionic liquid, platinum electrode, conducting wire, D.C. regulated power supply, bicone optical fiber, U-type groove, the platinum electrode is vertically placed on U-type groove inner wall both sides, and is connected with D.C. regulated power supply by conducting wire；Between two pieces of platinum electrodes that bicone optical taper area part is positioned in U-type groove；Ionic liquid is held in U-type groove.With the intensity and direction of extra electric field certain variation can occur for the distribution of anions and canons in ionic liquid, to change the transmission characteristic of ionic liquid；The evanescent wave of tapered optical fiber surface transmission can be under the influence of environmental factor, and spectral shape can change, so that the spectral shape of the output optical signal of tapered optical fiber changes.The present invention controls extra electric field by changing power, the direction of the voltage being applied in system on platinum electrode, can obtain the modulating characteristics such as photoswitch, Electro-optical Modulation.
Description
Technical field
The present invention relates to fiber optic communications and sensory field of optic fibre, and in particular to a kind of all -fiber electro-optic modulation system.
Background technology
In high speed long haul communication, external modulation is most important modulation system, and common external modulator has：Electro-optic crystal
Modulator, polar polymer optical modulator, semiconductor light modulator.The cardinal principle of modulator is direct electrooptic effect.It is organic
The plurality of advantages that polymer as electro-optical material has, such as：With lower relative dielectric constant, it is easier to realize high frequency characteristics；Kind
The various choice of class is big；With very high electro-optic coefficient.These advantages make polymer as electro-optical material become electrooptic modulator
Optimal selection, but since its stability is poor, loss is larger, does not have extensive use also temporarily.Polar polymer optical modulator is claimed
For next-generation optical modulator.
The material that current most of electro-optic modulation systems use is lithium niobate, and in device operational process, optical signal can be from
Input terminal is coupled into lithium niobate, then is coupled into output end.In this process, due to being across medium transmission, there is
More serious insertion loss.Simultaneously as lithium niobate is at room temperature solid-state, in the application environment for needing specific shape,
It needs further to process, improves the cost of equipment.
Modulator affects entire optical communication system as the Primary Component in optical transport network, and photoelectricity hybrid integrated is not
Carry out the inexorable trend of optical communication system.
Invention content
It is insufficient it is an object of the invention to overcome existing for prior art, meet growing photonic device experiment and
The demand of research and development, provides a kind of simple in structure, and plasticity is strong, and performance is stablized, generally applicable all -fiber electro-optic modulation system.
To achieve the purpose that foregoing invention is created, the present invention adopts the following technical scheme that：
A kind of all -fiber electro-optic modulation system, including ionic liquid, platinum electrode, conducting wire, D.C. regulated power supply, bicone optical fiber,
U-type groove, the platinum electrode is vertically placed on U-type groove inner wall both sides, and is connected with D.C. regulated power supply by conducting wire；By bicone
Optical taper area part is positioned between two pieces of platinum electrodes in U-type groove；Ionic liquid is held in U-type groove.
The ionic liquid is a kind of organic salt being made of anions and canons, has good electric conductivity and translucency,
It is a kind of medium and soft functional material, while its transmission characteristic can change with the variation of extra electric field.
The operation principle of apparatus of the present invention is：Ionic liquid is synthesized by the organic salt containing anions and canons, in room
Liquid form is presented under temperature state.In no extra electric field, the anions and canons in ionic liquid can be arbitrarily distributed；And working as is having
When extra electric field, the distribution situation of anions and canons is resequenced under electric field action, wherein anion can inverse direction of an electric field and by
It is gradually close to positive electrode, conversely, cation then can para-electric field direction and it is gradually close to negative electrode, will be eventually reached equilibrium-like
State, to make it change the transmission characteristic of light；At this moment, participated in when the intensity of electric field can influence equilibrium state it is mobile from
Subnumber amount.Therefore, when applying electric field to ionic liquid, the refractive index of ionic liquid can occur to change accordingly therewith.Double
Tapered optical fiber front end is equipped with light source, and spectrometer is equipped in bicone optical fiber rear end, when optical signal is by bicone optical fiber, cone
Waist surface portion will be coupled out evanescent wave.And evanescent wave can generate extraneous environmental change specific response, so that
The spectrum of optical signal generates corresponding variation.In the electro-optic modulation system of the present invention, the cone area part of double-tapered fiber is complete
It is immersed in ionic liquid.After two panels platinum electrode is applied with voltage, the evanescent wave of bicone optical fiber surface can be by ionic liquid
The influence of body variations in refractive index, optical signal transmission spectrum figure will produce corresponding change, to realize the modulation of spectrum.
Fused biconical taper method is used in the present invention, makes optical fiber local heating, then by applying pulling force to heated portion both ends, make
Its diameter becomes smaller, and forms double-tapered fiber.The double-tapered fiber can make the optical signal transmission pattern in optical fiber change, and this
It can intercouple and interfere between a little transmission modes.Meanwhile can also the optical signal of some pattern be coupled to optical fiber
Biconial area surface forms evanescent wave, and is transmitted along conical fiber surface, this part optical signals can be by environmental factor
Influence and change.When evanescent wave couples again backs into optical fiber, it will generate certain shadow to the signal light transmitted in optical fiber
It rings.
The present invention compared with prior art, has following obvious prominent substantive distinguishing features and remarkable advantage：
Apparatus of the present invention use ionic liquid as modulated media.Since it is in a liquid state at room temperature so that the shape of the present apparatus
It can be set as needed with size.Simultaneously ionic liquid have it is of low cost, can be synthesized as needed, good ion is led
Electrical and wide electrochemical window and high refractive index and good biography optical property etc. are many a little.
Apparatus of the present invention are compact using bicone optical fiber structure, it is simple, at low cost cheap to make.Simultaneously because its performance is excellent
More and controllability is strong, therefore can replace optical device much costly and can reach preferable effect.
Main body of the apparatus of the present invention using optical fiber itself as modulator, can be directly embedded into photonic device system or optical fiber
Among communications network system, compared with traditional modulator needs Space Coupling light path, loss is smaller.
Description of the drawings
Fig. 1 is a kind of all -fiber electro-optic modulation system structural schematic diagram.
Fig. 2 is U-type groove structural scheme of mechanism.
Fig. 3 is bicone optical fiber structure schematic diagram.
Specific implementation mode
More detailed description is carried out to the present invention in the following with reference to the drawings and specific embodiments.
Referring to Fig. 1, a kind of all -fiber electro-optic modulation system, including ionic liquid 1, platinum electrode 2, conducting wire 3, DC voltage-stabilizing
Power supply 4, bicone optical fiber 5, U-type groove 6, the platinum electrode 2 are vertically placed on 6 inner wall both sides of U-type groove, and by conducting wire 3 and direct current
Regulated power supply 4 is connected；Between two pieces of platinum electrodes 4 that the cone of bicone optical fiber 5 area part is positioned in U-type groove 6；In U-type groove 6
Hold ionic liquid 1.
It is equipped with light source 7 in 5 front end of bicone optical fiber, spectrometer 8 is equipped in 5 rear end of bicone optical fiber, passes through in optical signal
When bicone optical fiber 5, a part of optical signal can be transmitted along 5 surface of bicone optical fiber, form evanescent wave；Evanescent wave is through different electricity
After ionic liquid 1 under field intensity effect, spectral shape can change, to change the spectral shape of optical signal.
The course of work of the present embodiment all -fiber electro-optic modulation system is as follows：
When platinum electrode 2 is applied with voltage, the equally distributed state of anions and canons first in ionic liquid 1 is broken, and is passed through
The effect of electric field, anions and canons distribution will resequence, and the platinum electrode 2 for keeping potential high is a large amount of nearby to assemble anion, electricity
Nearby a large amount of aggregations are cationic for the low platinum electrode 2 of gesture.When anions and canons are when being moved to balance, the optical transport of ionic liquid
Characteristic starts to stablize.When signal light is by double-tapered fiber 5, boring lumbar region surface at it will have part signal optical coupling to go out along double
The evanescent wave of tapered optical fiber transmission, which can be changed by 1 transmission characteristic of ionic liquid is influenced, and spectral shape can be sent out
Changing.When evanescent wave is when the coupling of 5 end of double-tapered fiber backs into double-tapered fiber 5, evanescent wave can be with original part
Optical signal is overlapped mutually, and finally obtained output optical signal spectrum will produce corresponding change.When regulated power supply 4 is in two platinum electrodes
When the voltage applied between 2 is changed with certain frequency stabilization, in ionic liquid 1 distribution of anions and canons can also occur therewith
And regular variation eventually causes the rule for exporting optical signal spectrum so as to cause the regularity variation of its light-transfer characteristic
The modulation of rule property.
Claims (3)
1. a kind of all -fiber electro-optic modulation system, which is characterized in that including ionic liquid（1）, platinum electrode（2）, conducting wire（3）, it is straight
Flow regulated power supply（4）, bicone optical fiber（5）, U-type groove（6）, the platinum electrode（2）It is vertically placed on U-type groove（6）Inner wall both sides,
And by conducting wire（3）With D.C. regulated power supply（4）It is connected；By bicone optical fiber（5）Cone area part is positioned over U-type groove（6）In
Two pieces of platinum electrodes（4）Between；U-type groove（6）In hold ionic liquid（1）.
2. all -fiber electro-optic modulation system according to claim 1, which is characterized in that the ionic liquid（1）It is a kind of
The organic salt being made of anions and canons has good electric conductivity and translucency, is a kind of medium and soft functional material, together
When its transmission characteristic can change with the variation of extra electric field.
3. all -fiber electro-optic modulation system according to claim 1, which is characterized in that in bicone optical fiber（5）Front end is set
There is light source（7）, in bicone optical fiber（5）Rear end is equipped with spectrometer（8）, pass through bicone optical fiber in optical signal（5）When, a part
Optical signal can be along bicone optical fiber（5）Surface is transmitted, and evanescent wave is formed；Evanescent wave is through the ion under the effect of different electric field strengths
Liquid（1）Afterwards, spectral shape can change, to change the spectral shape of optical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810407506.2A CN108761848A (en) | 2018-05-02 | 2018-05-02 | A kind of all -fiber electro-optic modulation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810407506.2A CN108761848A (en) | 2018-05-02 | 2018-05-02 | A kind of all -fiber electro-optic modulation system |
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| CN108761848A true CN108761848A (en) | 2018-11-06 |
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| CN201810407506.2A Pending CN108761848A (en) | 2018-05-02 | 2018-05-02 | A kind of all -fiber electro-optic modulation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031324A (en) * | 2021-03-31 | 2021-06-25 | 广东工业大学 | Liquid crystal type electric control optical switch and preparation method thereof |
Citations (5)
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|---|---|---|---|---|
| CN1040213A (en) * | 1988-04-11 | 1990-03-07 | 肯特州大学 | The light modulating materials that includes the liquid crystal droplet of disperse in the double refraction polymer matrix |
| CN2223499Y (en) * | 1994-12-06 | 1996-03-27 | 西安交通大学 | Liquid core optical fibre photoelectric modulator |
| CN102955268A (en) * | 2012-10-29 | 2013-03-06 | 上海交通大学 | Surface plasma optical modulator based on metal nano waveguide |
| JP2013214044A (en) * | 2012-03-08 | 2013-10-17 | Univ Of Tokyo | Light modulator |
| CN106896277A (en) * | 2017-04-27 | 2017-06-27 | 北京航空航天大学 | A kind of electric-field sensor based on micro-nano optical fiber evanescent field and electro-optic polymer |
-
2018
- 2018-05-02 CN CN201810407506.2A patent/CN108761848A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040213A (en) * | 1988-04-11 | 1990-03-07 | 肯特州大学 | The light modulating materials that includes the liquid crystal droplet of disperse in the double refraction polymer matrix |
| CN2223499Y (en) * | 1994-12-06 | 1996-03-27 | 西安交通大学 | Liquid core optical fibre photoelectric modulator |
| JP2013214044A (en) * | 2012-03-08 | 2013-10-17 | Univ Of Tokyo | Light modulator |
| CN102955268A (en) * | 2012-10-29 | 2013-03-06 | 上海交通大学 | Surface plasma optical modulator based on metal nano waveguide |
| CN106896277A (en) * | 2017-04-27 | 2017-06-27 | 北京航空航天大学 | A kind of electric-field sensor based on micro-nano optical fiber evanescent field and electro-optic polymer |
Non-Patent Citations (1)
| Title |
|---|
| 李建新: "基于离子液体的电光调制特性实验研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113031324A (en) * | 2021-03-31 | 2021-06-25 | 广东工业大学 | Liquid crystal type electric control optical switch and preparation method thereof |
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Application publication date: 20181106 |
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