CN107765453A - Electrooptic modulator - Google Patents
Electrooptic modulator Download PDFInfo
- Publication number
- CN107765453A CN107765453A CN201711124050.0A CN201711124050A CN107765453A CN 107765453 A CN107765453 A CN 107765453A CN 201711124050 A CN201711124050 A CN 201711124050A CN 107765453 A CN107765453 A CN 107765453A
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- CN
- China
- Prior art keywords
- electrode
- modulator
- branch
- ground electrode
- top surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G02F1/03—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 based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/035—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 based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect in an optical waveguide structure
-
- 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
- G02F1/03—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 based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
-
- 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
- G02F1/03—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 based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
- G02F1/0316—Electrodes
Abstract
The present invention provides a kind of electrooptic modulator, and it includes the second modulator electrode of a substrate, a Y types fiber waveguide, the ground electrode of strip, the first modulator electrode of strip and a strip.The substrate includes a top surface.This spreads to Y types fiber waveguide from the top surface to the base internal forms, and including two one the first branch for being only used for transmitting H mode and second branch for being only used for transmitting transverse magnetic wave.The ground electrode, first modulator electrode and second modulator electrode are arranged on the top surface, the ground electrode and first modulator electrode are respectively arranged at the first branch both sides and the ground electrode covers second branch, and second modulator electrode is set in parallel in second branch side opposite with first branch.It is modulated in this way, transverse magnetic wave can be involved to transverse electric respectively to first electrode and second electrode by this, loads, transmits information, in the same time, loading, the information content increase of transmission, so as to improve the rate of information throughput.
Description
The application be Application No. 2012105031308, the applying date be that November 30, invention and created name in 2012 are
The divisional application of the patent of " electrooptic modulator ".
Technical field
The present invention relates to high speed light communication system, more particularly to a kind of electrooptic modulator.
Background technology
A kind of existing electrooptic modulator (Mach-Zehnder (Mach-Zehner) electrooptic modulator) utilizes electrooptic effect
Change the refractive index of one of the Liang Ge branches of Y type fiber waveguides by modulated electric fields, so as to change the phase of the light beam transmitted wherein
Position, is allowed to phase difference be present with the light beam transmitted in another branch of Y types fiber waveguide.In this way, in Y type fiber waveguide Liang Ge branches
The light beam of transmission will interfere after converging again, and power output depends on phase difference, that is to say and is determined by modulated electric fields, so as to
Realize modulation.However, with the rapid development of information technology, the rate of information throughput (bandwidth) have become technology development mainly examine
The direction of worry.The rate of information throughput of current electrooptic modulator has much room for improvement.
The content of the invention
In view of this, it is necessary to which a kind of electrooptic modulator for improving the rate of information throughput is provided.
A kind of electrooptic modulator, it includes a substrate, a Y types fiber waveguide, ground electrode, the strip of strip
The first modulator electrode and a strip the second modulator electrode.The substrate includes a top surface.This is to Y types fiber waveguide from the top
Formed towards base internal diffusion, and transmission H mode (transverse electric are only used for including two one
Wave the first branch and second branch for being only used for transmitting transverse magnetic wave (transverse magnetic wave)).Should
Ground electrode, first modulator electrode and second modulator electrode are arranged on the top surface, the ground electrode and first modulator electrode
Be respectively arranged at the first branch both sides and the ground electrode cover second branch, second modulator electrode be set in parallel in this
Two branches side opposite with first branch.
H mode is modulated in this way, can be coordinated by first modulator electrode with the ground electrode, loads, transmit letter
Breath, it can also be coordinated by second modulator electrode with the ground electrode and transverse magnetic wave is modulated, loaded, transmit information, namely
It is loading, the information content increase of transmission, so as to improve the rate of information throughput in the same time.
Brief description of the drawings
Fig. 1 is the schematic perspective view of the electrooptic modulator of better embodiment of the present invention.
Fig. 2 is the diagrammatic cross-section of II-II along Fig. 1 electrooptic modulator.
Main element symbol description
Electrooptic modulator 10
Substrate 110
Top surface 111
Y types fiber waveguide 120
First branch 121
Second branch 122
Incident section 123
It is emitted section 124
Ground electrode 131
First modulator electrode 132
Second modulator electrode 133
Cushion 140
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Fig. 1 and Fig. 2 is referred to, the electrooptic modulator 10 of better embodiment of the present invention, it includes a substrate 110, one
First modulator electrode 132 of 131, strips of ground electrode of individual 120, strips of Y types fiber waveguide and the second of a strip
Modulator electrode 133.The substrate 110 includes a top surface 111.This to Y types fiber waveguide 120 from the top surface 111 into the substrate 110
Portion's diffusion forms, and including two one the first branch for being only used for transmitting H mode (transverse electric wave)
121 and one be only used for transmit transverse magnetic wave (transverse magnetic wave) the second branch 122.The ground electrode 131,
First modulator electrode 132 and second modulator electrode 133 are arranged on the top surface 111, the ground electrode 131 and first modulation
Electrode 132 is respectively arranged at the both sides of the first branch 121 and the ground electrode 131 covers second branch 122, the second modulation electricity
Pole 133 is set in parallel in second branch 122 and the 121 opposite side of the first branch.
H mode is modulated in this way, can be coordinated by first modulator electrode 132 with the ground electrode 131, loads, pass
Defeated information, it can also be coordinated by second modulator electrode 133 with the ground electrode 131 and transverse magnetic wave is modulated, loaded, transmit
Information, it that is to say in the same time, loading, the information content increase of transmission, so as to improve the rate of information throughput.
Further, since transverse electric is transmitted respectively in first branch 121 and second branch 122 involves transverse magnetic wave, therefore mutually
Between crosstalk (cross talk) will not also occur.
Furthermore first modulator electrode 132 and second modulator electrode 133 share the ground electrode 131, rather than set up respectively
Ground electrode matches with first modulator electrode 132 and second modulator electrode 133, in this way, can simplify technique.
Due to lithium niobate (LiNbO3) crystal (LN) has higher reaction speed, therefore, the material of the substrate 110 uses
Lithium columbate crystal, to improve the bandwidth of the electrooptic modulator 10.
The Y types fiber waveguide 120 is general also to include an incident section 123 and an outgoing section 124.First branch 121 and
Second branch 122 separates from the incident section 123, and is aggregated into the outgoing section 124 again.The incident section 123 and the outgoing section
124 are formed by spreading Titanium (simple substance) on this substrate, and energy simultaneous transmission transverse electric involves transverse magnetic wave.And first branch
121 also continue to spread admiro after Titanium is spread, therefore can only transmit H mode, and second branch 122 is spreading
Metal is also spread after Titanium to transfer (simple substance), therefore can only transmit transverse magnetic wave.
Using the short transverse of the substrate 110 as x-axis, width is y-axis, first branch 121 and second branch 122
Length direction (i.e. the transmission direction of light) be z-axis, according to the Wave equation analysis of planar light waveguide, it is known that, H mode only has
Electric field component Ey along the y-axis direction, and transverse magnetic wave only has electric field component Ex along the x-axis direction and electric field component along the z-axis direction
Ez.And the setting of first modulator electrode 132 and the ground electrode 131 so that its interpolar electric fieldWith the friendship of first branch 121
It is folded to be partly parallel to y-axis direction, therefore can effectively modulate H mode.Second modulator electrode 133 is set with the ground electrode 131
Put so that its interpolar electric fieldTherefore overlapping part with second branch 122, can be modulated effectively parallel to x-axis direction
Transverse magnetic wave (electric field component Ex).
Preferably, in order to prevent light wave by the ground electrode 131, the first modulator electrode 132 and/or second modulator electrode
133 are absorbed, and one layer of cushion 140 can be initially formed in the substrate 110, then form the ground electrode on the cushion 140
131st, the first modulator electrode 132 and second modulator electrode 133.The cushion 140 is made of silica.
In a word, those skilled in the art are it should be appreciated that the embodiment of the above is intended merely to explanation originally
Invention, and be not used as limitation of the invention, as long as within the spirit of the present invention, to above example institute
The appropriate change and change made all fall within the scope of protection of present invention.
Claims (6)
1. a kind of electrooptic modulator, it includes a substrate, a Y types fiber waveguide, the ground electrode of strip, strip
Second modulator electrode of the first modulator electrode and a strip；The substrate includes a top surface；This is to Y types fiber waveguide from the top surface
Formed to base internal diffusion, and be only used for transmitting including two one the first branch for being only used for transmitting H mode and one
Second branch of transverse magnetic wave；The ground electrode, first modulator electrode and second modulator electrode are arranged on the top surface, ground electricity
Pole and first modulator electrode are respectively arranged at the first branch both sides and the ground electrode covers second branch, second modulation
Electrode runs parallel is arranged at second branch side opposite with first branch, and the Y types fiber waveguide typically also includes an incident section
An and outgoing section；First branch and second branch separate from the incident section, and are aggregated into the outgoing section again, and this second
Branch also spreads gallium after Titanium is spread and formed.
2. electrooptic modulator as claimed in claim 1, it is characterised in that the material of the substrate uses lithium columbate crystal.
3. electrooptic modulator as claimed in claim 1, it is characterised in that the incident section and the outgoing section pass through on this substrate
Spread Titanium and formed.
4. electrooptic modulator as claimed in claim 1, it is characterised in that first branch also continues to expand after Titanium is spread
Dissipate admiro and formed.
5. electrooptic modulator as claimed in claim 1, it is characterised in that the electrooptic modulator also include the first modulator electrode and
Cushion between second modulator electrode, for preventing light wave by the ground electrode, the first modulator electrode or the second modulation electricity
Pole is absorbed.
6. electrooptic modulator as claimed in claim 5, it is characterised in that the cushion is made of silica.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124050.0A CN107765453A (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124050.0A CN107765453A (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
| CN201210503130.8A CN103852917B (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210503130.8A Division CN103852917B (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107765453A true CN107765453A (en) | 2018-03-06 |
Family
ID=50860778
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711124050.0A Pending CN107765453A (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
| CN201210503130.8A Active CN103852917B (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210503130.8A Active CN103852917B (en) | 2012-11-30 | 2012-11-30 | Electrooptic modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107765453A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298550A (en) * | 2018-11-28 | 2019-02-01 | 中国电子科技集团公司第四十四研究所 | A kind of M-Z type lithium niobate intensity modulator of high extinction ratio |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020141679A1 (en) * | 2001-03-30 | 2002-10-03 | Masaharu Dol | Optical modulator |
| US20040008916A1 (en) * | 2002-07-12 | 2004-01-15 | Ridgway Richard William | Scheme for controlling polarization in waveguides |
| CN101981492A (en) * | 2008-03-31 | 2011-02-23 | 住友大阪水泥股份有限公司 | Mach-zehnder waveguide type optical modulator |
| CN102004332A (en) * | 2010-09-10 | 2011-04-06 | 电子科技大学 | Wave type optical modulator based on embedded coplanar waveguide (CPW) structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4936644A (en) * | 1989-06-13 | 1990-06-26 | Hoechst Celanese Corp. | Polarization-insensitive interferometric waveguide electrooptic modulator |
| US6172791B1 (en) * | 1999-06-04 | 2001-01-09 | Lucent Technologies Inc. | Electro-optic modulators |
| JP4198709B2 (en) * | 2005-02-17 | 2008-12-17 | アンリツ株式会社 | Light modulator |
| JP4682081B2 (en) * | 2006-04-27 | 2011-05-11 | 富士通株式会社 | Optical device |
| JP4445977B2 (en) * | 2007-03-30 | 2010-04-07 | 住友大阪セメント株式会社 | Light control element |
| BRPI0721901A2 (en) * | 2007-08-14 | 2014-12-09 | Selex Sistemi Integrati Spa | ELECTRICAL COMMANDED OPTICAL FREQUENCY SWITCH. |
-
2012
- 2012-11-30 CN CN201711124050.0A patent/CN107765453A/en active Pending
- 2012-11-30 CN CN201210503130.8A patent/CN103852917B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020141679A1 (en) * | 2001-03-30 | 2002-10-03 | Masaharu Dol | Optical modulator |
| US20040008916A1 (en) * | 2002-07-12 | 2004-01-15 | Ridgway Richard William | Scheme for controlling polarization in waveguides |
| CN101981492A (en) * | 2008-03-31 | 2011-02-23 | 住友大阪水泥股份有限公司 | Mach-zehnder waveguide type optical modulator |
| CN102004332A (en) * | 2010-09-10 | 2011-04-06 | 电子科技大学 | Wave type optical modulator based on embedded coplanar waveguide (CPW) structure |
Non-Patent Citations (2)
| Title |
|---|
| CHIA-HSING KANG等: "Design and Fabrication of Lithium Niobate TE-TM Mode Splitter", 《HE 16TH OPTO-ELECTRONICS AND COMMUNICATIONS CONFERENCE》 * |
| WEN-HUNG HUANG等: "Gallium In-Diffusion for the Fabrication of Lithium Niobate Optical Waveguides", 《IEEE PHOTONICS TECHNOLOGY LETTERS》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103852917B (en) | 2018-10-26 |
| CN103852917A (en) | 2014-06-11 |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180306 |
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| RJ01 | Rejection of invention patent application after publication |