CN110927856A - Liquid crystal optical vortex demultiplexer and manufacturing method thereof - Google Patents
Liquid crystal optical vortex demultiplexer and manufacturing method thereof Download PDFInfo
- Publication number
- CN110927856A CN110927856A CN201911273455.XA CN201911273455A CN110927856A CN 110927856 A CN110927856 A CN 110927856A CN 201911273455 A CN201911273455 A CN 201911273455A CN 110927856 A CN110927856 A CN 110927856A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- region
- alignment
- layer
- phase correction
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
The invention discloses a liquid crystal optical vortex demultiplexer, which comprises: a first transparent substrate for transmitting modulated light; the first orientation layer is arranged on one side of the first transparent substrate; the liquid crystal layer is arranged on one side, away from the first transparent substrate, of the first alignment layer; the second orientation layer is arranged on one side of the liquid crystal layer, which is far away from the first orientation layer; the second transparent substrate is arranged on one side, away from the liquid crystal layer, of the second alignment layer; the liquid crystal layer includes an alignment region including a phase correction region and a demultiplexing region, and a non-alignment region. The invention also discloses a manufacturing method of the liquid crystal optical vortex demultiplexer. According to the liquid crystal optical vortex demultiplexer and the manufacturing method thereof provided by the invention, the phase correction area and the demultiplexing area are arranged in the same device so as to avoid the problem that the demultiplexing device and the phase correction device cannot be completely parallel and coaxial due to the fact that the demultiplexing device and the phase correction device are respectively arranged, and further the optical vortex correction precision of the demultiplexing device and the phase correction component is insufficient.
Description
Technical Field
The invention relates to the field of optical communication, in particular to a liquid crystal optical vortex demultiplexer and a manufacturing method thereof.
Background
Currently, optical communication has long been the most dominant transmission means in information networks. In order to meet the increasing demand for information amount of human beings, new technologies are continuously emerging in the field of optical communication, wherein a technology of multiplexing various degrees of freedom and characteristics of light is a core key in optical communication. The mode division multiplexing technology using a set of mutually orthogonal spatial modes is also widely applied to free space and optical fiber communication, in the technology, spatial overlapping modes with the same frequency are coaxially transmitted in independent signal channels, mutual orthogonality and mutual noninterference between different modes are achieved, so that the spectral efficiency and the information capacity of an optical path are improved, and the parameters are proportional to the number of the transmitted modes. In the orthogonal mode concentration including the frequency, polarization, intensity and the like of light, the photon orbital angular momentum provides a high-dimensional state space for the light, and the information capacity in optical communication can be remarkably improved. While the beam with orbital angular momentum exhibits a characteristic azimuthal phase term exp (il phi), i.e. phi is the azimuthal coordinate in the plane perpendicular to the propagation direction and l is the azimuthal coordinate for each photon
Orbital angular momentum in units. Since the light beam carrying orbital angular momentum has a helical isophase surface, it is also called optical vortex. The most important two stages in the photon orbital angular momentum-based mode division multiplexing technology are the multiplexing stage and the demultiplexing stage of optical vortex, namely how to form collimated orthogonal optical vortex modes at the output end and how to demultiplex and identify them according to their orbital angular momentum information at the receiver after propagation.
However, diffractive optical elements manufactured by electron beam lithography or 3D laser printing tend to have disadvantages such as electrostatic loss and uneven phase change. The spiral coordinate conversion is applied to the phase design of the demultiplexer, but the scheme is realized by two spatial light modulators, so that the device integration precision is insufficient, and the defects of low resolution, high noise and the like exist.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a liquid crystal optical vortex demultiplexer which can solve the technical problem that the demultiplexing device and the phase correction assembly cannot correct optical vortex with insufficient precision due to the fact that the devices cannot be completely parallel and coaxial.
The invention also provides a manufacturing method of the liquid crystal optical vortex demultiplexer.
In a first aspect, an embodiment of the present invention provides a liquid crystal optical vortex demultiplexer: a first transparent substrate for transmitting modulated light;
the first orientation layer is arranged on one side of the first transparent substrate;
the liquid crystal layer is arranged on one side, far away from the first transparent substrate, of the first alignment layer;
the second alignment layer is arranged on one side, away from the first alignment layer, of the liquid crystal layer;
the second transparent substrate is arranged on one side, far away from the liquid crystal layer, of the second alignment layer;
the liquid crystal layer includes an alignment region including a phase correction region and a demultiplexing region, and a non-alignment region.
The liquid crystal optical vortex demultiplexer provided by the embodiment of the invention at least has the following beneficial effects: the optical vortex correction device has the advantages that the optical vortex correction device has low crosstalk, clear light spots and less light spot overlapping due to spiral coordinate conversion, the orientation area has high resolution and is free of mechanical damage, and the phase correction area and the demultiplexing area are arranged in the same device, so that the problem that the demultiplexing device and the phase correction device cannot be completely parallel and coaxial due to the fact that the demultiplexing device and the phase correction device are arranged in the same device is solved, and further the optical vortex correction precision of the demultiplexing device and the phase correction component is insufficient.
According to other embodiments of the liquid crystal optical vortex demultiplexer of the present invention, the phase correction region is disposed in a central region of the alignment region;
the demultiplexing area is arranged at the edge area of the orientation area and surrounds the liquid crystal layer.
According to other embodiments of the liquid crystal optical vortex demultiplexer of the present invention, a support structure is disposed between the first transparent substrate and the second transparent substrate.
According to other embodiments of the invention, the material of the first transparent substrate and the second transparent substrate comprises indium tin oxide.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a liquid crystal optical vortex demultiplexer, including:
arranging a first transparent substrate for transmitting modulated light;
arranging a first orientation layer on one side of the first transparent substrate;
arranging a liquid crystal layer on one side of the first alignment layer, which is far away from the first transparent substrate;
arranging a second alignment layer on one side of the liquid crystal layer far away from the first alignment layer;
arranging a second transparent substrate on one side of the second orientation layer far away from the liquid crystal layer;
an alignment region and a non-alignment region are provided in the liquid crystal layer, and a phase correction region and a demultiplexing region are provided in the alignment region.
The manufacturing method of the liquid crystal optical vortex demultiplexer provided by the embodiment of the invention at least has the following beneficial effects; the phase correction area and the demultiplexing area are arranged in the same device so as to avoid the insufficient precision of the demultiplexing device and the phase correction component in correcting the optical vortex caused by the fact that the demultiplexing device and the phase correction device cannot be completely parallel and coaxial due to the fact that the demultiplexing device and the phase correction device are respectively arranged.
According to the manufacturing method of the liquid crystal optical vortex demultiplexer, the phase correction area is arranged in the central area of the orientation area;
and arranging the demultiplexing area at the edge area of the orientation area and surrounding the phase correction area.
According to other embodiments of the present invention, the phase correction region is a spiral distribution.
According to other embodiments of the present invention, the demultiplexing regions are symmetrically distributed.
Drawings
FIG. 1 is a schematic diagram of a liquid crystal optical vortex demultiplexer in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an optimized design system for the liquid crystal optical vortex demultiplexer of FIG. 1;
FIGS. 3A-3C are schematic diagrams of the alignment regions of the liquid crystal layer in the liquid crystal optical vortex demultiplexer in an embodiment of the present invention.
Reference numeral, 10, a first transparent substrate; 20. a first alignment layer; 30. a liquid crystal layer; 40. a second alignment layer; 50. a second transparent substrate; 31. a support structure; 32. an orientation region; 311. a phase correction area; 312. a demultiplexing area; 61. a controller; 62. a digital micromirror array; 63. a laser; 64. a beam splitter; 65. a polarizing plate; 66. and a beam reduction objective lens.
Detailed Description
The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the orientations or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a number" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "greater than", "lower" or "inner" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a liquid crystal optical vortex demultiplexer according to an embodiment of the present invention. As shown in fig. 1, a liquid crystal optical vortex demultiplexer includes: a first transparent substrate 10 for transmitting modulated light; a first alignment layer 20 disposed on one side of the first transparent substrate 10; the liquid crystal layer 30 is arranged on one side, far away from the first transparent substrate 10, of the first alignment layer 20; the second alignment layer 40 is arranged on one side of the liquid crystal layer 30 far away from the first alignment layer 20; the second transparent substrate 50 is arranged on one side of the second alignment layer 40 away from the liquid crystal layer 30; the liquid crystal layer 30 includes an alignment region including a phase correction region 311 and a demultiplexing region 312, and a non-alignment region. Orientation zone
The phase correction region 311 is disposed in the center region of the alignment region; the demultiplexing area 312 is disposed at an edge area of the alignment area and surrounds the phase correction area 311.
A support structure 31 is disposed between the first transparent substrate 10 and the second transparent substrate 50.
The first transparent substrate 10 and the second transparent substrate 50 are made of indium tin oxide.
The alignment region of the liquid crystal layer 30 may be disposed in a central region of the liquid crystal layer 30, and the non-alignment region is disposed in an edge region of the liquid crystal layer 30 and surrounds the alignment region.
The liquid crystal optical vortex demultiplexer principle in the above embodiment is further explained below.
Liquid crystals are anisotropic materials that have birefringent properties. When a light beam passes through the liquid crystal device, the light beam may generate a certain phase delay. When the phase retardation satisfies the half-wave condition, the geometric phase of the light beam (also referred to as Pancharatnam-Berry phase) can be modulated by the phase distribution of the liquid crystal device.
Because the phase distribution of the conventional demultiplexing device and the phase correction device is complex, the resolution requirement of the corresponding devices is higher, and the demultiplexing device and the phase correction device cannot be completely parallel and coaxially aligned in the practical application process.
Based on the characteristic that the optical vortex light spots are in annular intensity distribution, the liquid crystal optical vortex demultiplexer is manufactured by compositely designing the demultiplexing device and the phase correction device in the embodiment. The liquid crystal optical vortex demultiplexer is provided with a phase correction area and a demultiplexing area so as to respectively carry out phase correction and demultiplexing on light beams through the same device.
For a liquid crystal demultiplexer device (liquid crystal half-wave plate) with a constant α (i.e., the angle between the optical axis of the liquid crystal molecules and the polarization vector of the incident light), the jones matrix is:
α is a fixed constant, that is, the arrangement directions of liquid crystal molecules in the liquid crystal demultiplexer device are identical so that the angle of rotation of the linear polarization vector of an incident light beam is 2 α. due to the natural smoothness of the variation curve of the orientation of the liquid crystal molecules, when a two-dimensional function α (x, y) is used instead of the constant α, the distribution of the liquid crystal molecules is patterned and the geometric phase of the light beam can be modulated.
Unlike log-polar transformation, which maps circles to parallel lines, helical transformation provides N-fold phase shift for the wavefront of the output light through helical to linear mapping to extend the periodic phase of the input orbital angular momentum.
The phase function of a liquid crystal optical vortex demultiplexer derived by a logarithmic spiral (where a >0, s is any integer) is as follows:
wherein a and β are scale parameters,
is the wave vector of the light beam. And r is a radial coordinate and theta is an angular coordinate to represent a polar coordinate of the position of the logarithmic spiral, so the theta threshold is not limited to [0,2 pi ].
The polar coordinates (r, θ) are related to the cartesian coordinates (x, y) by:
r＝(x2+y2)1/2，θ＝θ0+2mπ (3)
wherein, theta0Is a standard polar coordinate and can be expressed as
The integer m represents the ordinal number of the helix and can be expressed as:
r0the point θ representing the spiral is 0, which is the distance of (0,0) mapped onto the output plane.
The phase function on the demultiplexing area of the input plane is the phase required to map the input plane's vortex phase to the linear phase after the beam propagation distance d. (u, v) are cartesian coordinates on the output plane, and the phase correction zone is placed on this plane from the demultiplexing component d to correct for phase distortions caused by propagation. The phase function of the phase correction zone is as follows:
the optical vortex first passes through the demultiplexing region (while the input intensity of the phase correction region is zero), and then the light beam is reflected by the mirror and illuminates the phase correction region of the liquid crystal optical vortex demultiplexer. Thus, the overall phase function for the orientation zone is a combination of the phase functions in equations (2) and (5), as shown below:
αsum＝α(x,y)θ(ρ-ρ1)+α(u,v)θ(ρ1-ρ) (6)
ρ is the radius of the phase correction region, and θ is the hervesaide function (for x >0, otherwise θ (x) ═ 0).
Referring to FIGS. 3A-3C, phase distribution diagrams of alignment regions of a liquid crystal layer in a liquid crystal optical vortex demultiplexer are shown. The alignment area comprises a phase correction area and a demultiplexing area, wherein the phase correction area is arranged in the central area of the liquid crystal layer alignment area, and the demultiplexing area is arranged in the edge area of the liquid crystal layer alignment area and surrounds the phase correction area.
The demultiplexing area is used for demultiplexing the optical vortex, and the phase correction area is used for performing phase correction on the demultiplexed optical vortex.
Referring to fig. 1 again, an embodiment of the present invention further provides a method for manufacturing a liquid crystal optical vortex demultiplexer, including: a first transparent substrate 10 is provided for transmitting modulated light; a first alignment layer 20 is provided on one side of the first transparent substrate 10; arranging a liquid crystal layer 30 on the side of the first alignment layer 20 far away from the first transparent substrate 10; a second alignment layer 40 is arranged on the side of the liquid crystal layer 30 far away from the first alignment layer 20; a second transparent substrate is arranged on the side, away from the liquid crystal layer 30, of the second alignment layer 40; an alignment region and a non-alignment region are provided in the liquid crystal layer 30, and a phase correction region 311 and a demultiplexing region 312 are provided in the alignment region of the liquid crystal layer 30.
The phase correction region 311 is disposed in the central region of the alignment region of the liquid crystal layer 30; the demultiplexing region 312 is disposed at an edge region of the alignment region of the liquid crystal layer 30 and surrounds the phase correction region 311.
The phase correction region 311 is spirally distributed; the demultiplexing regions are symmetrically distributed.
Referring to fig. 2, a hollow interlayer is previously formed by providing a support structure 31 between a first alignment layer 20 and a second alignment layer 40. The liquid crystal layer 30 is provided between the first alignment layer 20 and the second alignment layer 40 by filling the hollow interlayer with liquid crystal. A phase correction region 311 and a demultiplexing region 312 are provided in the liquid crystal layer 30, specifically, the micro-mirror array miniature projection exposure system aligns the first alignment layer 20 and the second alignment layer 40 to pattern the first alignment layer 20 and the second alignment layer 40. After patterning the first alignment layer 20 and the second alignment layer 40, the hollow interlayer is filled with liquid crystal, and a predetermined pattern of a phase correction region 311 (see fig. 3C) and a demultiplexing region 312 (see fig. 3C) is formed in the alignment region 32 of the liquid crystal layer 30.
Based on the characteristic that the optical vortex light spots are in annular intensity distribution, the liquid crystal optical vortex demultiplexer is manufactured by compositely designing the demultiplexing device and the phase correction device, and is provided with the phase correction area and the demultiplexing area so as to respectively perform phase correction and demultiplexing on the light beams through the same device.
Referring to fig. 2 and fig. 3A to fig. 3C, a phase correction region 311 and a demultiplexing region 312 are disposed in the alignment region of the liquid crystal layer 30, specifically, the micro-mirror array miniature projection exposure system aligns the first alignment layer 20 and the second alignment layer 40 to pattern the first alignment layer 20 and the second alignment layer 40. The support structure 31 is preset between the first alignment layer 20 and the second alignment layer 40, so that a hollow interlayer is preset between the two.
After the first alignment layer 20 and the second alignment layer 40 are patterned, the hollow interlayer is filled with liquid crystal, and the alignment regions 32 in the liquid crystal layer 30 form preset patterns of the phase correction regions 311 and the demultiplexing regions 312.
The micro-lenses in the digital micro-lens array 62 are modulated by the controller 61 according to the preset pattern information, so that the surface of the digital micro-lens array 62 forms a preset pattern. The laser 63 generates a laser beam, which is incident on the beam splitter 64 and partially reflected to the surface of the digital micromirror array 62 to form a laser beam carrying predetermined pattern information. The laser beam carrying the predetermined pattern information is reflected on the surface of the micromirror array 62 and propagates back to the polarizer 65. The polarizing plate 65 modulates the polarization state of the laser beam carrying the preset pattern information to form a target modulated beam. The objective lens 66 focuses the target modulated light beam such that the converged light beam of the target modulated light beam crosses the first and second photo- alignment layers 10 and 40, and simultaneously modulates the alignment patterns of the first and second photo- alignment layers 10 and 40.
Based on the characteristic that the optical vortex light spots are in annular intensity distribution, the liquid crystal optical vortex demultiplexer is manufactured by compositely designing the demultiplexing device and the phase correction device, and is provided with the phase correction area and the demultiplexing area so as to respectively perform phase correction and demultiplexing on the light beams through the same device.
For a liquid crystal demultiplexer device (liquid crystal half-wave plate) with a constant α (i.e., the angle between the optical axis of the liquid crystal molecules and the polarization vector of the incident light), the jones matrix is:
α is a fixed constant, that is, the arrangement directions of liquid crystal molecules in the liquid crystal demultiplexer device are identical so that the angle of rotation of the linear polarization vector of an incident light beam is 2 α. due to the natural smoothness of the variation curve of the orientation of the liquid crystal molecules, when a two-dimensional function α (x, y) is used instead of the constant α, the distribution of the liquid crystal molecules is patterned and the geometric phase of the light beam can be modulated.
Unlike log-polar transformation, which maps circles to parallel lines, helical transformation provides N-fold phase shift for the wavefront of the output light through helical to linear mapping to extend the periodic phase of the input orbital angular momentum.
The phase function of a liquid crystal optical vortex demultiplexer derived by a logarithmic spiral (where a >0, s is any integer) is as follows:
wherein a and β are scale parameters,
is the wave vector of the light beam. And r is a radial coordinate and theta is an angular coordinate to represent a polar coordinate of the position of the logarithmic spiral, so the theta threshold is not limited to 0,2 pi). The polar coordinates (r, θ) are related to the cartesian coordinates (x, y) by:
r＝(x2+y2)1/2，θ＝θ0+2mπ (3)
wherein, theta0Is a standard polar coordinate and can be expressed as
The integer m represents the ordinal number of the helix and can be expressed as:
r0the point θ representing the spiral is 0, which is the distance of (0,0) mapped onto the output plane.
The phase function on the demultiplexing area of the input plane is the phase required to map the input plane's vortex phase to the linear phase after the beam propagation distance d. (u, v) are cartesian coordinates on the output plane, and the phase correction zone is placed on this plane from the demultiplexing component d to correct for phase distortions caused by propagation. The phase function of the phase correction zone is as follows:
the optical vortex first passes through the demultiplexing region (while the input intensity of the phase correction region is zero), and then the light beam is reflected by the mirror and illuminates the phase correction region of the liquid crystal optical vortex demultiplexer. The overall phase function for this compact configuration is therefore a combination of the phase functions in equations (2) and (5), as shown below:
αsum＝α(x,y)θ(ρ-ρ1)+α(u,v)θ(ρ1-ρ) (6)
ρ is the radius of the phase correction region, and θ is the hervesaide function (for x >0, otherwise θ (x) ═ 0).
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (8)
1. A liquid crystal optical vortex demultiplexer comprising:
a first transparent substrate for transmitting modulated light;
a first alignment layer disposed on the first transparent substrate;
the liquid crystal layer is arranged on one side, far away from the first transparent substrate, of the first alignment layer;
the second alignment layer is arranged on one side, away from the first alignment layer, of the liquid crystal layer;
the second transparent substrate is arranged on one side, far away from the liquid crystal layer, of the second alignment layer;
the liquid crystal layer includes an alignment region including a phase correction region and a demultiplexing region, and a non-alignment region.
2. The liquid crystal optical vortex demultiplexer of claim 1, wherein the phase correction region is disposed in a central region of the alignment region;
the demultiplexing area is arranged at the edge area of the orientation area and surrounds the phase correction area.
3. The liquid crystal optical vortex demultiplexer of claim 1, wherein a support structure is disposed between the first transparent substrate and the second transparent substrate.
4. The liquid crystal optical vortex demultiplexer of claim 1, wherein the first and second transparent substrates comprise indium tin oxide.
5. A method for manufacturing a liquid crystal optical vortex demultiplexer is characterized in that,
a first transparent substrate for transmitting modulated light;
arranging a first orientation layer on one side of the first transparent substrate;
arranging a liquid crystal layer on one side of the first alignment layer, which is far away from the first transparent substrate;
arranging a second alignment layer on one side of the liquid crystal layer far away from the first alignment layer;
arranging a second transparent substrate on one side of the second orientation layer far away from the liquid crystal layer;
an alignment region and a non-alignment region are provided in the liquid crystal layer, and a phase correction region and a demultiplexing region are provided in the alignment region.
6. The method of claim 5, wherein the phase correction region is disposed in a central region of the alignment region;
and arranging the demultiplexing area at the edge area of the orientation area and surrounding the phase correction area.
7. The method of claim 6, wherein the phase correction zones are distributed in a spiral pattern.
8. The method of claim 7, wherein the demultiplexing regions are symmetrically distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273455.XA CN110927856B (en) | 2019-12-12 | 2019-12-12 | Liquid crystal optical vortex demultiplexer and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273455.XA CN110927856B (en) | 2019-12-12 | 2019-12-12 | Liquid crystal optical vortex demultiplexer and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110927856A true CN110927856A (en) | 2020-03-27 |
| CN110927856B CN110927856B (en) | 2023-10-20 |
Family
ID=69859227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911273455.XA Active CN110927856B (en) | 2019-12-12 | 2019-12-12 | Liquid crystal optical vortex demultiplexer and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110927856B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000258644A (en) * | 1999-03-04 | 2000-09-22 | Oki Electric Ind Co Ltd | Optical multiplexer/demultiplexer and formation of the same |
| JP2003233086A (en) * | 2002-02-13 | 2003-08-22 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| CN101382684A (en) * | 2008-09-19 | 2009-03-11 | 哈尔滨工程大学 | Polarization insensitivity liquid crystal photon crystal filter and making method thereof |
| CN104272374A (en) * | 2012-03-14 | 2015-01-07 | 苹果公司 | Systems and methods for liquid crystal display column inversion using 3-column demultiplexers |
| CN109164643A (en) * | 2018-09-21 | 2019-01-08 | 苏州晶萃光学科技有限公司 | A kind of perfection vortex photogenerator and preparation method thereof |
| CN211603602U (en) * | 2019-12-12 | 2020-09-29 | 华南师范大学 | Liquid crystal optical vortex demultiplexer |
-
2019
- 2019-12-12 CN CN201911273455.XA patent/CN110927856B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000258644A (en) * | 1999-03-04 | 2000-09-22 | Oki Electric Ind Co Ltd | Optical multiplexer/demultiplexer and formation of the same |
| JP2003233086A (en) * | 2002-02-13 | 2003-08-22 | Matsushita Electric Ind Co Ltd | Liquid crystal display device |
| CN101382684A (en) * | 2008-09-19 | 2009-03-11 | 哈尔滨工程大学 | Polarization insensitivity liquid crystal photon crystal filter and making method thereof |
| CN104272374A (en) * | 2012-03-14 | 2015-01-07 | 苹果公司 | Systems and methods for liquid crystal display column inversion using 3-column demultiplexers |
| CN109164643A (en) * | 2018-09-21 | 2019-01-08 | 苏州晶萃光学科技有限公司 | A kind of perfection vortex photogenerator and preparation method thereof |
| CN211603602U (en) * | 2019-12-12 | 2020-09-29 | 华南师范大学 | Liquid crystal optical vortex demultiplexer |
Non-Patent Citations (2)
| Title |
|---|
| 周冠清，袁冬: "用于电响应红外反射窗的液晶聚合物薄膜特性研究" * |
| 娄丽芳: "光通信中波分复用器件的实现技术" * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110927856B (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103430065B (en) | radial optical coupler | |
| US11243450B2 (en) | Saw modulator having optical power component for extended angular redirection of light | |
| KR102355452B1 (en) | Display device for holographic reconstruction | |
| JP2023083284A (en) | Methods of fabricating optical waveguides | |
| US10197715B1 (en) | Methods of diffractive lens and mirror fabrication | |
| CN103246015B (en) | Multicast optical switch | |
| US20190215069A1 (en) | Mode division multiplexing optical communication system | |
| JP6598389B2 (en) | Optical beam deflection element, wavelength selective cross-connect device using the same, and optical cross-connect device | |
| JP2018533069A (en) | Waveguide display | |
| US20210293934A1 (en) | Switched optical phased array based beam steering lidar | |
| CN115698790A (en) | Fiber to chip interconnection | |
| JP2003511717A (en) | Light switch | |
| JP2011075739A (en) | Optical waveguide device | |
| WO2012056987A1 (en) | Light control device | |
| CN111130637B (en) | Measurement method and measurement system of photon spin-orbital angular momentum combined mode | |
| WO2019207438A1 (en) | Optical device for demultiplexing and multiplexing modes with different orbital angular momentum | |
| CN108663740A (en) | The linearly polarized light polarizer based on dielectric nano brick Meta Materials and preparation method | |
| JP2003133201A (en) | Optical recording apparatus and its method | |
| Wang et al. | Multi-channel beam splitters based on gradient metasurfaces | |
| CN211603602U (en) | Liquid crystal optical vortex demultiplexer | |
| CN101881860A (en) | Device for realizing digital optical phase conjugation | |
| WO2021051960A1 (en) | Spectral processing apparatus and reconfigurable optical add-drop multiplexer | |
| CN110927856A (en) | Liquid crystal optical vortex demultiplexer and manufacturing method thereof | |
| CN110082906A (en) | Optical phased array based on imperfect asymmetric AWG | |
| Sakamoto et al. | Hybrid polarization grating for mode detection of vector beams |
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 |