CN112578581B - Electro-optic polarization modulator based on lithium niobate Y waveguide integrated optical device - Google Patents
Electro-optic polarization modulator based on lithium niobate Y waveguide integrated optical device Download PDFInfo
- Publication number
- CN112578581B CN112578581B CN202011460741.XA CN202011460741A CN112578581B CN 112578581 B CN112578581 B CN 112578581B CN 202011460741 A CN202011460741 A CN 202011460741A CN 112578581 B CN112578581 B CN 112578581B
- Authority
- CN
- China
- Prior art keywords
- lithium niobate
- polarization
- waveguide
- electro
- polarization maintaining
- 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.)
- Active
Links
Images
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
- G02F1/0136—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 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
-
- 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
- G02F1/0311—Structural association of optical elements, e.g. lenses, polarizers, phase plates, with the crystal
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention discloses an electro-optic polarization modulator based on a proton exchange type lithium niobate Y waveguide integrated optical device, which relates to the field of photoelectronic technology and optical communication, and comprises the proton exchange type lithium niobate Y waveguide integrated optical device and an optical fiber polarization beam combiner, wherein the proton exchange type lithium niobate Y waveguide integrated optical device comprises a first polarization maintaining fiber and a lithium niobate crystal, and the optical fiber polarization beam combiner comprises a second polarization maintaining optical fiber, a third polarization maintaining optical fiber and a fourth polarization maintaining optical fiber; the lithium niobate crystal comprises a lithium niobate crystal layer, a lithium niobate Y waveguide, a metal electrode and an insulating medium protective layer, wherein the Y waveguide is arranged in the lithium niobate crystal layer, the metal electrode is covered on two sides of the branch of the Y waveguide, and the insulating medium protective layer is fully distributed around the lithium niobate Y waveguide and the metal electrode. The invention utilizes the electro-optic effect to realize the modulation of the electric signal on the polarization state of the light, and is convenient for loading the electric signal to the specified polarization state of the light for polarization coding.
Description
Technical Field
The invention relates to the field of photoelectronic technology and optical communication, in particular to an electro-optic polarization modulator based on a lithium niobate Y waveguide integrated optical device.
Background
With the rapid development of optical communication, polarization encoding has received great attention due to power balance and good polarization stability. Polarization encoding is the process of modulating the polarization state of light to load information, so that polarization modulators are particularly important in polarization encoding. At present, polarization modulation mainly depends on acousto-optic, electro-optic and magneto-optic effects, wherein the polarization modulator based on the electro-optic effect has the outstanding advantages of high modulation speed, high control precision and the like, so that the polarization modulator is rapidly developed and widely applied.
The electro-optic effect refers to a phenomenon that the refractive index of a material changes under the action of an external electric field. Electro-optic polarization modulation is a method of modulating the polarization state of light by loading an electrical signal using the electro-optic effect. Electro-optic polarization modulation can be implemented based on a variety of platforms, including silicon, liquid crystal materials, group iii-v compounds (e.g., indium phosphide, gallium arsenide), electro-optic crystals (e.g., lithium niobate), and the like. The silicon-based electro-optical modulator mainly utilizes the free carrier dispersion effect, changes the distribution of carriers in the silicon material through an external electric field to change the refractive index, and further realizes the electro-optical modulation. However, the response speed of silicon-based electro-optic modulators is limited by the carrier mobility rate, which is on the order of nanoseconds. Liquid crystal materials have both flow and crystal structure. Under the action of an external electric field, the arrangement of liquid crystal molecules changes to generate birefringence, but the birefringence is also limited by the liquid crystal material, and the response speed of the liquid crystal material is in the order of microseconds or even milliseconds. Compared with silicon materials and liquid crystal materials, the III-V group compound has stronger electro-optic effect and nonlinear optical effect, but has two obvious defects of high insertion loss and poor long-term thermal stability of the materials.
Compared with the optical material, the lithium niobate serving as a multifunctional ferroelectric material has a wide transparent window (0.4-5.0um), good temperature thermal stability and a high electro-optic coefficient (gamma)3332.2pm/V) and nonlinear coefficient (d)3330pm/V), possesses excellent electro-optical characteristics and nonlinear optical characteristics, has response speed in the order of femtoseconds, and thus has great advantages in high-speed electro-optical polarization modulation. The electro-optic polarization modulator based on the lithium niobate waveguide is mainly prepared by a method of titanium diffusion and proton exchange. The titanium diffusion type lithium niobate waveguide simultaneously supports TE and TM modes, but the electro-optic polarization modulator based on the titanium diffusion type lithium niobate waveguide has large temperature fluctuation and poor thermal stability, so that the electro-optic polarization modulator based on the titanium diffusion type lithium niobate waveguide has low extinction ratio and insufficient long-term stability. The proton exchange type lithium niobate waveguide has low transmission loss and higher polarization extinction ratio, but only supports single polarization mode operation, so that only phase regulation can be realized, and polarization modulation cannot be realized.
Therefore, those skilled in the art have been devoted to developing an electro-optic polarization modulator based on proton-exchange lithium niobate Y-waveguide integrated optical devices.
Disclosure of Invention
Aiming at the problems mentioned above, such as the defects that the existing titanium diffusion type lithium niobate electro-optic polarization modulator is low in polarization extinction ratio and insufficient in long-term stability, and the proton exchange type lithium niobate electro-optic modulator can only realize phase regulation and cannot realize polarization modulation, the invention provides the electro-optic polarization modulator based on the proton exchange type lithium niobate Y waveguide integrated optical device. The light is divided into two beams of light with equal power and same polarization through a Y waveguide branch structure, and the two beams of light enter an optical fiber polarization beam combiner and are converted into two orthogonal linear polarization light beams to be combined. By utilizing the electro-optic effect, the refractive index is changed by adjusting the voltage, so that the phase difference of the two lights is changed, the modulation of the electric signal on the polarization state of the light can be realized, the electric signal is conveniently loaded to the specified polarization state of the light, and the polarization coding is carried out.
In order to achieve the above object, the present invention provides an electro-optical polarization modulator based on a lithium niobate Y waveguide integrated optical device, which is characterized by comprising a proton exchange type lithium niobate Y waveguide integrated optical device and an optical fiber polarization beam combiner, wherein the proton exchange type lithium niobate Y waveguide integrated optical device comprises a first polarization maintaining fiber and a lithium niobate crystal, and the optical fiber polarization beam combiner comprises a second polarization maintaining fiber, a third polarization maintaining fiber and a fourth polarization maintaining fiber; the lithium niobate crystal comprises a lithium niobate crystal layer, a lithium niobate Y waveguide, a metal electrode and an insulating medium protective layer, wherein the Y waveguide is arranged in the lithium niobate crystal layer, the metal electrode is covered on two sides of a branch of the Y waveguide, and the insulating medium protective layer is fully distributed around the lithium niobate Y waveguide and the metal electrode.
Further, the first polarization maintaining fiber is integrated with a proton exchange type lithium niobate Y waveguide.
Furthermore, a second polarization maintaining fiber and a third polarization maintaining fiber of the fiber polarization beam combiner are connected with the first polarization maintaining fiber, the second polarization maintaining fiber is transmitted along the slow axis, the third polarization maintaining fiber is transmitted along the fast axis, and the second polarization maintaining fiber and the third polarization maintaining fiber are combined in a fourth polarization maintaining fiber.
Further, the second polarization maintaining optical fiber and the third polarization maintaining optical fiber are connected with the first polarization maintaining optical fiber through a flange plate.
Further, the branch structure of the Y waveguide can divide the input light into two beams of light with equal intensity and same polarization.
Further, the Y waveguide is prepared by an annealing proton exchange process on an X-cut lithium niobate substrate.
Further, by adjusting the voltage, the modulation of the polarization state by the electric signal can be realized.
Further, the proton exchange type lithium niobate Y waveguide integrated optical device is further provided with a package structure, the package structure includes a polarization maintaining fiber and an external SMA interface, wherein: the polarization maintaining fiber pigtail and the lithium niobate Y waveguide chip are fixedly bonded through ultraviolet glue, laser is coupled in/out of the lithium niobate Y waveguide in an optical fiber end face oblique coupling mode, and the laser is input/output along the slow axis of the polarization maintaining fiber.
Furthermore, the metal electrode adopts a push-pull structure, and the phase of one branch is increased while the phase of the other branch is reduced by the same amount.
Furthermore, the insulating medium protection layer is an optically transparent filling medium layer.
Compared with the prior art, the proton exchange type lithium niobate Y waveguide is combined with the optical fiber polarization beam combiner, the phase difference of the two optical paths is changed by utilizing the electro-optic effect, and finally the modulation of the electric signal on the optical polarization state is realized.
The invention has the following beneficial technical effects:
firstly, the modulation metal electrode of the proton exchange type lithium niobate Y waveguide adopts a push-pull modulation design, and has the advantages of low insertion loss, low driving voltage and the like.
And secondly, in principle, the polarization state obtained by modulation is determined by the phase difference of two orthogonal polarization states, and the phase difference is changed, so that the polarization state can be modulated. In the electro-optic effect of the lithium niobate crystal, the phase change and the loaded electric signal have a simple linear relationship. Thus, the polarization modulation has good response characteristics.
And thirdly, the response speed of the electro-optic effect is high, and the rapid polarization modulation can be realized.
And fourthly, the lithium niobate Y waveguide integrated optical device only supports a single polarization working mode and has higher polarization extinction ratio.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic diagram of an electro-optic polarization modulator according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a top view of an electro-optic polarization modulator according to a preferred embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a proton-exchanged lithium niobate Y waveguide in an electro-optic polarization modulator according to a preferred embodiment of the present invention;
fig. 4 is a schematic diagram of a package structure of a proton-exchange lithium niobate Y waveguide integrated optical device in an electro-optical polarization modulator according to a preferred embodiment of the present invention.
In the figure: the optical fiber polarization maintaining device comprises a polarization maintaining optical fiber 1, an optical fiber 11 fixing device, a lithium niobate crystal 2, a lithium niobate Y waveguide 21, a push-pull modulation metal electrode 22, a lithium niobate crystal layer 23, an insulating medium protective layer 24, a flange plate 3, a polarization beam combiner 4 based on a melting optical fiber, a polarization maintaining optical fiber 41 (transmitting along a slow axis), a polarization maintaining optical fiber 42 (transmitting along a fast axis), a polarization maintaining optical fiber 43, a base 5 and an electric SMA interface 51.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
Example one
As shown in fig. 1, fig. 2 and fig. 3, this embodiment mainly includes a proton exchange type lithium niobate Y waveguide integrated optical device and an optical fiber polarization beam combiner 4, which are connected through a flange 3. The lithium niobate Y waveguide integrated optical device comprises: a polarization maintaining optical fiber 1 and a lithium niobate crystal 2. Wherein, the lithium niobate crystal 2 includes: and the lithium niobate Y waveguide 21, the push-pull modulation metal electrode 22 and the insulating medium protective layer 24 are sequentially arranged on the lithium niobate crystal layer 23. The fused fiber based polarization beam combiner 4 includes: polarization maintaining fiber 41 traveling along the slow axis, polarization maintaining fiber 42 traveling along the fast axis, and polarization maintaining fiber 43.
As shown in FIG. 2, the lithium niobate crystal 2 has a length of 23mm and a width of 2.8 mm. The distance between the two branches of the lithium niobate Y waveguide 21 placed thereon is 0.4 mm.
The following is a detailed description of the electro-optic polarization modulator. The electro-optic polarization modulator mainly comprises a proton exchange type lithium niobate Y waveguide integrated optical device and an optical fiber polarization beam combiner 4. The proton exchange type lithium niobate Y waveguide 21 is prepared by an annealing proton exchange process on an X-cut lithium niobate substrate, and the waveguide supports only a single polarization mode. Two ends of the Y waveguide chip are connected with the tail fiber of the polarization maintaining fiber 1 in an end face oblique coupling mode and are fixedly connected with the tail fiber by ultraviolet glue 11. The polarization maintaining fiber 1 of the proton exchange type lithium niobate Y waveguide integrated optical device and the polarization maintaining fibers 41 and 42 of the polarization beam combiner based on the fusion optical fiber are connected by the flange 3, thereby constituting the electro-optical polarization modulator of the mach-zehnder interferometer structure. The polarization maintaining optical fiber 1 inputs communication 1550nm waveband laser, the light is divided into two beams of light with equal power and same polarization through a Y waveguide branch structure, the light is output along a slow axis of the polarization maintaining optical fiber, after passing through a flange plate, the two beams of polarized light aligned to the slow axis enter a fused optical fiber polarized light beam combiner 4, one branch is transmitted 41 along the slow axis of the polarization maintaining optical fiber, the other branch is transmitted 42 along a fast axis, and then two orthogonal linear polarization lights are combined. Under the action of the electro-optical effect, the phase difference of the two branches of light changes. When the phase difference is 0 and pi, 45-degree linearly polarized light and 135-degree linearly polarized light can be obtained; when the phase difference is pi/2, 3 pi/2, right-handed circularly polarized light and left-handed circularly polarized light can be obtained; when the phase difference is other values from 0 to 2 pi, elliptically polarized light can be obtained. Therefore, by adjusting the voltage, the modulation of the polarization state by the electrical signal can be achieved. The voltage signal is loaded through a push-pull modulation structure, and the driving voltage can be effectively reduced.
The optical guided mode is positioned in a Y waveguide 21 structure prepared by an annealing proton exchange process.
The insulating medium protection layer 24 is an optically transparent filling medium layer. The optical waveguide is mainly used for protecting the optical waveguide and preventing air electrical breakdown and the like.
As shown in fig. 4, the package structure of the lithium niobate Y waveguide integrated optical device is a package structure in which the two ends of the tail fiber of the polarization maintaining optical fiber 1 and the lithium niobate Y waveguide chip are fixed by ultraviolet glue 11, and laser is coupled into/out of the lithium niobate Y waveguide 21 by an optical fiber end face oblique coupling method.
The polarization maintaining fiber 1 of the proton exchange type lithium niobate Y waveguide and the polarization maintaining fibers 41, 42 and 43 of the polarization beam combiner 4 based on the fusion fiber output along the slow axis, and the slow axis is parallel to the key.
The voltage loaded to the lithium niobate Y waveguide integrated optical device is input through an SMA interface 51 arranged on the packaging structure, and an interface electrode is welded on a modulation electrode of the Y waveguide through a gold wire; the half-wave voltage is about 3.5V and is far lower than the traditional Pockels cell, and the electro-optical polarization modulator has low driving voltage characteristics.
In the electro-optic effect of the lithium niobate crystal, the phase change and the loaded electric signal have a simple linear relationship; the polarization state obtained by modulation is determined by the phase difference of two orthogonal polarization states, so that the polarization modulation has good response characteristic.
The lithium niobate crystal has high electro-optic coefficient (gamma)3332.2pm/V) and has a very high response speed (femtosecond magnitude), and high-speed polarization modulation can be realized by using the principle of changing the phase difference between two orthogonal polarizations to modulate the polarization state.
Example two
The proposed solution is not limited to the fiber-based polarization beam combiner described in embodiment 1, but can also be implemented in a polarization beam combiner of birefringent crystals. After being combined by the birefringent crystal, the output light can be space light or can be coupled into an optical fiber again.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. An electro-optic polarization modulator based on a lithium niobate Y waveguide integrated optical device is characterized by comprising a proton exchange type lithium niobate Y waveguide integrated optical device and an optical fiber polarization beam combiner, wherein the proton exchange type lithium niobate Y waveguide integrated optical device comprises a first polarization maintaining fiber and a lithium niobate crystal, and the optical fiber polarization beam combiner comprises a second polarization maintaining fiber, a third polarization maintaining fiber and a fourth polarization maintaining fiber; the lithium niobate crystal comprises a lithium niobate crystal layer, a lithium niobate Y waveguide, a metal electrode and an insulating medium protective layer, wherein the lithium niobate Y waveguide is arranged in the lithium niobate crystal layer, the metal electrode is covered on two sides of a branch of the lithium niobate Y waveguide, and the insulating medium protective layer is fully distributed around the lithium niobate Y waveguide and the metal electrode;
the second polarization maintaining fiber and the third polarization maintaining fiber of the optical fiber polarization beam combiner are connected with the first polarization maintaining fiber, the second polarization maintaining fiber is transmitted along the slow axis, the third polarization maintaining fiber is transmitted along the fast axis, and the second polarization maintaining fiber and the third polarization maintaining fiber are combined in the fourth polarization maintaining fiber.
2. The lithium niobate Y-waveguide integrated-optics based electro-optic polarization modulator of claim 1, wherein the first polarization maintaining fiber is integrated with the proton-switched lithium niobate Y-waveguide.
3. The lithium niobate Y-waveguide integrated optical device-based electro-optic polarization modulator of claim 1, wherein the second polarization maintaining fiber and the third polarization maintaining fiber are connected to the first polarization maintaining fiber through flanges.
4. The electro-optic polarization modulator based on the lithium niobate Y waveguide integrated optical device as claimed in claim 1, wherein the branching structure of the lithium niobate Y waveguide can split the input light into two beams of light with equal intensity and same polarization.
5. The electro-optic polarization modulator based on a lithium niobate Y waveguide integrated optical device of claim 1, wherein the lithium niobate Y waveguide is prepared by an annealing proton exchange process on an X-cut lithium niobate substrate.
6. The electro-optic polarization modulator based on the lithium niobate Y-waveguide integrated optical device of claim 1, wherein the modulation of the polarization state by the electrical signal can be achieved by adjusting the voltage.
7. The electro-optic polarization modulator based on the lithium niobate Y-waveguide integrated optical device of claim 1, wherein the metal electrode adopts a push-pull structure, and the phase of one branch is increased while the phase of the other branch is decreased by the same amount.
8. The lithium niobate Y-waveguide integrated optical device-based electro-optic polarization modulator of claim 1, wherein the insulating dielectric protective layer is an optically transparent filled dielectric layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460741.XA CN112578581B (en) | 2020-12-11 | 2020-12-11 | Electro-optic polarization modulator based on lithium niobate Y waveguide integrated optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460741.XA CN112578581B (en) | 2020-12-11 | 2020-12-11 | Electro-optic polarization modulator based on lithium niobate Y waveguide integrated optical device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112578581A CN112578581A (en) | 2021-03-30 |
| CN112578581B true CN112578581B (en) | 2022-03-08 |
Family
ID=75131589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011460741.XA Active CN112578581B (en) | 2020-12-11 | 2020-12-11 | Electro-optic polarization modulator based on lithium niobate Y waveguide integrated optical device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112578581B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115494582B (en) * | 2022-11-22 | 2023-02-14 | 中国船舶集团有限公司第七〇七研究所 | Bare waveguide for eliminating zero offset error between optical fiber gyroscope axes and electromagnetic coupling verification method |
| CN115621839B (en) * | 2022-12-20 | 2023-04-14 | 北京世维通科技股份有限公司 | Laser device and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0411208A (en) * | 1990-04-27 | 1992-01-16 | Nec Corp | Waveguide type polarized light separating element |
| CN2513124Y (en) * | 2001-11-23 | 2002-09-25 | 福州康顺光通讯有限公司 | New small polarized light beam synthesizer |
| CN102122086B (en) * | 2010-12-29 | 2013-06-19 | 北京航天时代光电科技有限公司 | Dual-polarization-mode lithium niobate straight waveguide phase modulator and preparation method thereof |
| CN102621637B (en) * | 2012-04-11 | 2014-02-26 | 珠海保税区光联通讯技术有限公司 | Crystal polarization maintaining fiber coupler and manufacturing method thereof |
| CN103197443B (en) * | 2013-04-24 | 2015-09-02 | 中国电子科技集团公司第四十四研究所 | straight waveguide phase modulator |
| CN108761851A (en) * | 2018-08-09 | 2018-11-06 | 中国电子科技集团公司第二十六研究所 | A kind of polarization maintaining optical fibre high speed electro-optical device |
-
2020
- 2020-12-11 CN CN202011460741.XA patent/CN112578581B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112578581A (en) | 2021-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0817988B1 (en) | Polarization-insensitive, electro-optic modulator | |
| Alferness | Guided-wave devices for optical communication | |
| Pan et al. | Waveguide fabrication and high-speed in-line intensity modulation in 4-N, N-4′-dimethylamino-4′-N′-methyl-stilbazolium tosylate | |
| Voges et al. | Integrated-optic devices on LiNbO 3 for optical communication | |
| CN101782693B (en) | Multi-functional integrated optical device | |
| CN112578581B (en) | Electro-optic polarization modulator based on lithium niobate Y waveguide integrated optical device | |
| CN101614882A (en) | Optical modulation device photoreactive semiconductor device | |
| CN112835215B (en) | Lithium niobate thin film electro-optical modulator chip and modulator | |
| CN105700202B (en) | A kind of PM-QPSK integrated optic modulator and its working method based on lithium niobate | |
| GB2271192A (en) | Optical switch | |
| Dorn et al. | Nonlinear optical materials for integrated optics: Telecommunications and sensors | |
| Makino et al. | Demonstration of thin-film lithium niobate high-bandwidth coherent driver modulator | |
| Yu et al. | Small form factor thin film polymer modulators for telecom applications | |
| CN112034638A (en) | Polarization-independent optical phase shifter | |
| CN115755442A (en) | O-waveband multi-mode interference type silicon-based optical switch based on antimony sulfide on waveguide | |
| CN115236881A (en) | Electro-optic polarization modulator based on thin-film lithium niobate | |
| CN114077071B (en) | Monitoring device for controlling bias voltage of lithium niobate thin film electro-optical modulator | |
| Zheng et al. | High speed, low voltage polarization controller based on heterogeneous integration of silicon and lithium niobate | |
| CN207067573U (en) | High-speed electro-optic modulator | |
| CN215067593U (en) | Silicon-based electro-optical modulator irrelevant to polarization | |
| CN117666179A (en) | High-speed polarization modulation chip based on film lithium niobate electro-optic effect | |
| Smith et al. | Polarization Sensitivity Of Ti: LiNbO [sub] 3 [/sub] Intensity Modulators | |
| Jung et al. | Interferometric polarization-independent modulator in LiTaO/sub 3 | |
| Wong et al. | Proton-exchange X-cut lithium tantalate fiber optic gyro chips | |
| Becker | 10.3 Circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |