CN111399127A - Optical beam splitter and optical system - Google Patents
Optical beam splitter and optical system Download PDFInfo
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- CN111399127A CN111399127A CN202010356803.6A CN202010356803A CN111399127A CN 111399127 A CN111399127 A CN 111399127A CN 202010356803 A CN202010356803 A CN 202010356803A CN 111399127 A CN111399127 A CN 111399127A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
Abstract
The present disclosure relates to an optical splitter, including: a beam input for receiving an incident beam; a light beam output end for emitting the emitted light beam; and the super-surface material chip is positioned between the light beam incident end and the light beam output end and used for dispersing the converged light beam input from the light beam input end into a plurality of diffracted light beams with different propagation directions based on diffraction effect. The optical beam splitter in the embodiment of the disclosure can realize that the input polymerization light beam generates diffraction effect in the super-surface material chip, thereby generating a plurality of diffraction light beams and outputting the diffraction light beams in different directions, and further realizing the beam splitting and emitting of the incident light beam.
Description
Technical Field
The present disclosure relates to the field of optical technologies, and in particular, to an optical splitter and an optical system.
Background
A beam splitter is an optical device that can split a beam of light into two or more beams of light. An optical splitter for use in fiber optic communications can split the energy in the fiber into specific components as desired to meet fiber optic communications requirements. Conventional optical splitters are mostly fabricated based on waveguide coupling theory, which has a plurality of optical beam output ports. However, in a specific application, the manufacturing cost of the existing optical splitter is relatively high.
Disclosure of Invention
In one aspect, the present disclosure provides an optical splitter.
The optical splitter provided by the embodiment of the present disclosure includes:
a beam input for receiving an incident beam;
a light beam output end for emitting the emitted light beam; and
and the super-surface material chip is positioned between the light beam incident end and the light beam output end and used for dispersing the converged light beam input from the light beam input end into a plurality of diffracted light beams with different propagation directions based on the diffraction effect.
In some embodiments, the meta-material chip includes: a super-surface layer;
the super surface layer includes: a plurality of unit particles for dispersing the converged light beam input from the light beam input end into a plurality of diffracted light beams having different propagation directions.
In some embodiments, the plurality of unit particles comprises: the unit particles have different volumes; wherein, the spot areas of the diffraction beams formed by the unit particles with different volumes are different.
In some embodiments, a plurality of said unit particles of which said volumes are different form a plurality of particle arrays;
a plurality of said particle arrays arranged laterally and periodically;
alternatively, the first and second electrodes may be,
a plurality of said particle arrays arranged periodically in a longitudinal direction;
alternatively, the first and second electrodes may be,
a plurality of the particle arrays are arranged in a circumferential periodic manner.
In some embodiments, the focusing lens is positioned between the chip with the super surface material and the beam output end, and the chip with the super surface material is positioned at the focal point of the focusing lens.
In some embodiments, the diffracted light beams emitted from the chip with the super surface material are at least three beams, and any three beams of the diffracted light beams are emitted from the same emission position in a conical shape with different propagation directions.
In some embodiments, further comprising:
an output collimator array located between the focusing lens and the beam output end;
the output collimator array comprises first end faces of output collimators parallel to a plane of the focusing lens.
In some embodiments, further comprising:
a micro-lens array positioned between the focusing lens and the beam output end,
the plane of the micro lenses included in the micro lens array is parallel to the plane of the focusing lens.
In some embodiments, the optical splitter further comprises:
an optical fiber connected to the second end face of the output collimator; the second end surface is opposite to the first end surface.
In some embodiments, the optical module further comprises a plugging slot, the plugging slot is located between the light beam incidence end and the light beam output end, and the super surface material chip is inserted into the plugging slot.
In another aspect, the present disclosure also provides an optical system.
The optical system provided by the embodiment of the present disclosure includes the optical beam splitter provided in the above aspect.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the light splitting of the light beam splitter is realized by utilizing the diffraction effect of the super-surface material chip. When the optical splitter is used specifically, the super-surface material chip capable of realizing the corresponding light splitting effect is arranged in the optical splitter according to the light splitting effect required based on the light splitting characteristic of the super-surface material chip. In addition, the optical splitter in the embodiment of the disclosure has the advantages of simple structure, convenience in manufacturing, small volume, low manufacturing cost and the like, and can meet the communication requirements in optical fiber communication.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a first schematic diagram illustrating a structure of an optical splitter according to an exemplary embodiment.
Fig. 2 is a first schematic diagram illustrating the exit of a diffracted beam according to an exemplary embodiment.
Fig. 3 is a schematic diagram of a structure of an optical splitter shown in accordance with an exemplary embodiment.
FIG. 4 is a diagram illustrating a diffracted beam exit diagram two, according to an exemplary embodiment.
Fig. 5 is a first diagram illustrating a first distribution of mean power diffracted beam spots, according to an example embodiment.
Fig. 6 is a second diagram illustrating a spot distribution of a split-power diffracted beam according to an exemplary embodiment.
Fig. 7 is a schematic diagram illustrating cell particle distribution within a super surface material chip, according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a first schematic diagram illustrating a structure of an optical splitter according to an exemplary embodiment. As shown in fig. 1, the optical splitter includes at least:
a beam input 10 for receiving an incident beam;
a beam output end 17 for emitting the emitted beam; and
and the super surface material chip 12 is positioned between the light beam incident end 10 and the light beam output end 17 and is used for dispersing the converged light beam input from the light beam input end 10 into a plurality of diffracted light beams with different propagation directions based on diffraction effect.
In the present exemplary embodiment, the light splitting structure is a metamaterial chip 12 and the incident light beam is a converging light beam. After the polymerized light beams are incident to the chip with the super surface material, diffraction effect is generated in the chip, and a plurality of diffracted light beams with different propagation directions are generated. Meanwhile, in the present exemplary embodiment, the super surface material chip is a light transmitting element. The specific structure of the chip for realizing the diffraction of the polymerized light beam can be specifically designed according to the light splitting effect realized by specific requirements. In specific application, the super surface material chip 12 with different light splitting effects is used according to different light splitting requirements.
In some embodiments, the meta-material chip includes: a super-surface layer;
the super surface layer includes: a plurality of unit particles for dispersing the converged light beam input from the light beam input end into a plurality of diffracted light beams having different propagation directions. In the present exemplary embodiment, the metamaterial is a basic particle such as a molecule or atom of a natural material replaced with an ordered artificial unit "particle" to form an equivalent material. The incident polymerization light beam is subjected to diffraction reaction through the unit particles of the super surface layer, so that the polymerization light beam is split. The split beams are emitted along different angles, so that different beam transmission directions are formed.
In some embodiments, the plurality of unit particles comprises: the unit particles have different volumes; wherein, the spot areas of the diffraction beams formed by the unit particles with different volumes are different. In the present exemplary embodiment, the unit particles in the meta-surface material chip may be unit particles having different volume sizes. The area of a light spot formed after the light beam passes through the unit particles and is subjected to diffraction reaction is influenced by the volume of the unit particles. The light beam formed by diffraction of unit particles with larger volume has larger light spot area; the light beam formed by diffraction of the unit particles with small volume has small spot area.
In some embodiments, a plurality of said unit particles of which said volumes are different form a plurality of particle arrays;
a plurality of said particle arrays arranged laterally and periodically;
alternatively, the first and second electrodes may be,
a plurality of said particle arrays arranged periodically in a longitudinal direction;
alternatively, the first and second electrodes may be,
a plurality of the particle arrays are arranged in a circumferential periodic manner.
The transverse and longitudinal directions are directions substantially perpendicular to each other of the meta-material chips.
A plurality of particle arrays arranged laterally and periodically; a plurality of the particle arrays are arranged periodically in the longitudinal direction, and a rectangular array composed of the particle arrays is formed again.
The plurality of particle arrays are arranged circumferentially, specifically, they may be arranged along the radius of the circle at equal angles, forming a circular array.
In the present exemplary embodiment, a plurality of unit particles whose volumes are not the same form a plurality of particle arrays. The array of particles may be a rectangular array of N x N, where N is greater than or equal to 2. The array of particles may also be a concentric circular array. On the basis that a plurality of different particle arrays are formed by unit particles with different volumes, the different particle arrays are arranged transversely, longitudinally or circumferentially in a periodic manner to form the whole arrangement of the unit particles in the chip with the super surface material. Thus, the surface of the unit particle arrangement periodic structure is formed on the super-surface material chip. The periodic structure surface in the super surface material chip can provide the phase of gradient change. When the converging light beam is incident on the surface of the periodic structure, a diffraction effect occurs, causing the incident converging light beam to split. The diffracted beams after splitting are output along different angles.
In some embodiments, the focusing lens is positioned between the chip with the super surface material and the beam output end, and the chip with the super surface material is positioned at the focal point of the focusing lens.
As shown in fig. 1, the focusing lens 13 may be a convex lens. The convex lens in the optical beam splitter is arranged behind the focusing lens along the transmission direction of the optical path, so that the chip 12 with the super surface material is positioned at the focus of the focusing lens 13, and the diffracted light beams scattered by the chip 12 with the super surface material can be enabled to be transmitted through the focusing lens 13 and then become parallel light beams.
In some embodiments, the number of the diffracted beams emitted through the chip with the super surface material is at least two, and the diffracted beams emitted from the same position are emitted in a plane shape in different propagation directions. Fig. 2 is a first schematic diagram illustrating the exit of a diffracted beam according to an exemplary embodiment. As shown in fig. 2, in the present exemplary embodiment, a diffracted light beam 33 generated by diffracting the converged light beam 31 by the super surface material chip 32 may be emitted in a planar shape. The emergent light can be two, three, five or more diffracted lights, but the diffracted lights can be in the same plane. Spots 34 formed on the same plane by the diffracted beams 33 are on a straight line.
In some embodiments, further comprising:
an output collimator array located between the focusing lens and the beam output end;
the output collimator array comprises first end faces of output collimators parallel to a plane of the focusing lens. Fig. 3 is a schematic diagram of a structure of an optical splitter shown in accordance with an exemplary embodiment. As shown in fig. 3, in the present exemplary embodiment, the parallel light beam output in parallel through the focusing lens is directly input into the output collimator 31. The number of output collimators 31 in the output collimator array corresponds to the number of diffracted beams. For example, a chip with super surface material diffracts to generate 5 diffracted beams, 5 output collimators 31 are arranged in the output collimator array.
In order to ensure that the light beams output through the output collimators can be output in parallel in the horizontal direction, a plurality of output collimators are arranged parallel to each other in the present exemplary embodiment and are all parallel to the optical axis of the focusing lens, as shown in fig. 3, to achieve parallel output of diffracted light beams.
In some embodiments, the diffracted light beams emitted from the chip with the super surface material are at least three beams, and any three beams of the diffracted light beams are emitted from the same emission position in a conical shape with different propagation directions. FIG. 4 is a diagram illustrating a diffracted beam exit diagram two, according to an exemplary embodiment. As shown in fig. 4, in the present exemplary embodiment, a diffracted beam 43 generated by the polymerized beam 41 diffracting through the metamaterial chip 42 may be emitted in a conical shape. The distribution of the spots 44 formed on the same plane by the diffracted beams 43 is shown in fig. 4.
In some embodiments, further comprising:
a micro-lens array positioned between the focusing lens and the beam output end,
the plane of the micro lenses included in the micro lens array is parallel to the plane of the focusing lens. As shown in fig. 1, in the present exemplary embodiment, parallel light beams output in parallel through the focusing lens 13 are incident into the microlenses 14 in the microlens array one-to-one, and the parallel light beams are output through the optical centers of the microlenses 14. The number of microlenses in the microlens array coincides with the number of diffracted beams. For example, 5 diffracted beams are generated by the diffraction of the super surface material chip, and 5 microlenses are arranged in the microlens array. The microlens array is directly connected to the optical fiber array 15, and the optical fiber array 15 contains 5 optical fibers 16.
In some embodiments, the optical splitter further comprises:
an optical fiber connected to the second end face of the output collimator; the second end surface is opposite to the first end surface. In the present exemplary embodiment, the output collimator is directly connected to the optical fiber. The diffracted beam becomes a parallel beam and is directly led out through the optical fiber.
In some embodiments, the optical module further comprises a plugging slot, the plugging slot is located between the light beam incidence end and the light beam output end, and the super surface material chip is inserted into the plugging slot. In the present exemplary embodiment, as shown in FIG. 1, a plug slot 18 is provided in the optical splitter to facilitate ultra surface material chip replacement. When the optical splitter is used specifically, the metamaterial chips with different unit particle structures are replaced according to different light splitting effect requirements, so that different light splitting characteristics of the optical splitter are met, and the optical splitter is simple to operate and convenient to use.
As shown in fig. 1, in some embodiments, an input collimator 11 is further included, and the input collimator 11 is located between the beam incident end 10 and the super surface material chip 12. The collimated aggregate beam output by the input collimator 11 is incident on the metamaterial chip 12.
When the optical beam splitter is particularly applied to the disclosed embodiment, multiple ports can be equally divided in power by designing the periodic arrangement of the particle arrays in the metamaterial chip, so that the energy output by each output port is consistent, for example, the optical beam splitter can be provided with two, three or five output ports, 1 × 2, 1 × 3 and 1 × 5 beam splitters can be realized in the optical beam splitter by replacing the corresponding metamaterial chip, the diffracted light beams are output in power through the output ports, the spot distribution of the diffracted light beams is shown in fig. 5, and fig. 5 is a first schematic diagram of the spot distribution of the equally divided power diffracted light beams according to an exemplary embodiment.
When the optical splitter with 5 output ports is applied, when the chip a, the chip B and the chip C with the super surface material are respectively inserted into the plugging slot of the optical splitter, the light spots emitted from the five ports are distributed as shown in fig. 5. The output energy of each port is equal. The light beam spots of the emergent five ports are equal in size.
When the same optical beam splitter is applied to realize the purpose that the output energy of the ports is not equal so as to form a certain proportion of energy output, the sizes of the light spots of the obtained light beams are different. Fig. 6 is a second diagram illustrating a spot distribution of a split-power diffracted beam according to an exemplary embodiment. As shown in fig. 6, when the chip D and the chip E with super surface materials are respectively inserted into the insertion slot of the beam splitter, the energy output ratios of the two output ports are 95:5 and 50: 50. the proportional relation of the sizes of the light beam spots of the emergent ports is consistent with the proportional relation of energy output.
Fig. 7 is a schematic diagram illustrating cell particle distribution within a super surface material chip, according to an exemplary embodiment. As shown in fig. 7, the unit particles 71 inside the chip of the meta-surface material are distributed in a periodic arrangement, so that the chip has a periodic structure surface, which can provide a phase with a gradient change. This is obtained by the diffraction effect of light, which occurs when incident light is projected onto the surface of the periodic structure, so that the light beam generates different diffraction orders, each with a different energy. Through design derivation, the energy distribution of diffraction orders can be controlled by changing the distribution of the periodic structure, so that two or more output light beams are obtained, and the energy proportion of each light beam can be controlled. The embodiment of the disclosure also provides an optical system, which includes the optical beam splitter provided by the above embodiments.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (11)
1. A beam splitter, comprising:
a beam input for receiving an incident beam;
a light beam output end for emitting the emitted light beam; and
and the super-surface material chip is positioned between the light beam incident end and the light beam output end and used for dispersing the converged light beam input from the light beam input end into a plurality of diffracted light beams with different propagation directions based on the diffraction effect.
2. The optical splitter of claim 1 wherein the metamaterial chip comprises: a super-surface layer;
the super surface layer includes: a plurality of unit particles for dispersing the converged light beam input from the light beam input end into a plurality of diffracted light beams having different propagation directions.
3. The optical beam splitter according to claim 2, wherein the plurality of unit particles include: the unit particles have different volumes; wherein, the spot areas of the diffraction beams formed by the unit particles with different volumes are different.
4. The optical beam splitter according to claim 3 wherein a plurality of said unit particles having different volumes form a plurality of particle arrays;
a plurality of said particle arrays arranged laterally and periodically;
alternatively, the first and second electrodes may be,
a plurality of said particle arrays arranged periodically in a longitudinal direction;
alternatively, the first and second electrodes may be,
a plurality of the particle arrays are arranged in a circumferential periodic manner.
5. The optical beam splitter of claim 1 further comprising a focusing lens located between the metamaterial chip and the beam output end, and wherein the metamaterial chip is located at a focal point of the focusing lens.
6. The optical beam splitter according to claim 1, wherein the diffracted beams emitted from the metamaterial chip are at least three beams, and any three beams of the diffracted beams are emitted from the same emission position in a conical shape with different propagation directions.
7. The optical splitter of claim 5, further comprising:
an output collimator array located between the focusing lens and the beam output end;
the output collimator array comprises first end faces of output collimators parallel to a plane of the focusing lens.
8. The optical splitter of claim 5, further comprising:
a micro-lens array positioned between the focusing lens and the beam output end,
the plane of the micro lenses included in the micro lens array is parallel to the plane of the focusing lens.
9. The optical splitter of claim 7, further comprising:
an optical fiber connected to the second end face of the output collimator; the second end surface is opposite to the first end surface.
10. The optical splitter according to any one of claims 1 to 9, further comprising a plug slot, wherein the plug slot is located between the beam incident end and the beam output end, and the chip with super surface material is inserted into the plug slot.
11. An optical system comprising a beam splitter as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010356803.6A CN111399127A (en) | 2020-04-29 | 2020-04-29 | Optical beam splitter and optical system |
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| CN202010356803.6A CN111399127A (en) | 2020-04-29 | 2020-04-29 | Optical beam splitter and optical system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114296179A (en) * | 2021-12-30 | 2022-04-08 | 武汉邮电科学研究院有限公司 | Optical splitter and design method thereof |
| WO2022115121A1 (en) * | 2020-11-25 | 2022-06-02 | Corning Incorporated | Metasurface-based optical signal manipulation devices for optical fiber communications |
-
2020
- 2020-04-29 CN CN202010356803.6A patent/CN111399127A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022115121A1 (en) * | 2020-11-25 | 2022-06-02 | Corning Incorporated | Metasurface-based optical signal manipulation devices for optical fiber communications |
| CN114296179A (en) * | 2021-12-30 | 2022-04-08 | 武汉邮电科学研究院有限公司 | Optical splitter and design method thereof |
| CN114296179B (en) * | 2021-12-30 | 2023-12-01 | 武汉邮电科学研究院有限公司 | Optical beam splitter and design method thereof |
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