CN114089472A - Polymer mode multiplexer, space division multiplexing device and space division multiplexing method - Google Patents
Polymer mode multiplexer, space division multiplexing device and space division multiplexing method Download PDFInfo
- Publication number
- CN114089472A CN114089472A CN202111356235.0A CN202111356235A CN114089472A CN 114089472 A CN114089472 A CN 114089472A CN 202111356235 A CN202111356235 A CN 202111356235A CN 114089472 A CN114089472 A CN 114089472A
- Authority
- CN
- China
- Prior art keywords
- mode
- polymer
- few
- multiplexer
- waveguide
- 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.)
- Pending
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 55
- 238000010168 coupling process Methods 0.000 claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 claims abstract description 30
- 230000008878 coupling Effects 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000005253 cladding Methods 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims description 81
- 239000013307 optical fiber Substances 0.000 claims description 46
- 238000004891 communication Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 4
- 230000010287 polarization Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
-
- 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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/12088—Monomode
-
- 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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12133—Functions
- G02B2006/12152—Mode converter
-
- 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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12133—Functions
- G02B2006/12164—Multiplexing; Demultiplexing
Abstract
A polymer mode multiplexer, a space division multiplexing device and a space division multiplexing method relate to the field of optical devices in optical communication, the multiplexer comprises at least one single-mode waveguide and a few-mode waveguide, each single-mode waveguide is connected with an input port, two ends of the few-mode waveguide are respectively connected with an input port and an output port, the single-mode waveguide and the few-mode waveguide are arranged in a polymer cladding, the polymer cladding is a photoelectric polymer with a refractive index of 1.4-1.7, and a section of coupling area is formed between the single-mode waveguide and the few-mode waveguide; and the optical signal entering the single mode waveguide is subjected to mode conversion in the coupling area and enters the few-mode waveguide, the residual optical signal is led out through the tip of the single mode waveguide, and the optical signal entering the few-mode waveguide is not subjected to mode conversion. The invention improves the compatibility of mode multiplexing and multi-core multiplexing, combines the functions of fan-in and fan-out of the multi-core fan and the mode multiplexer together, and reduces the complexity of the whole device.
Description
Technical Field
The invention relates to the field of optical devices in optical communication, in particular to a polymer mode multiplexer, a space division multiplexing device and a space division multiplexing method.
Background
In order to increase the transmission capacity of an optical transmission system, the amplitude, frequency, phase and polarization of light have been utilized and approach the limit by optical transmission techniques such as high-order modulation formats, digital coherent reception, polarization multiplexing, and the like. Space division multiplexing optical transmission technology using a mode and a fiber core as new multiplexing dimensions is also applied successively, and is widely considered as a main technical trend for breaking through the transmission capacity limit of single-mode optical fibers and coping with capacity crisis in the industry. The existing space division multiplexing optical transmission system comprises two types of few-mode multiplexing and multi-core multiplexing transmission, and a transmission medium of the optical transmission system comprises few-mode single-core optical fibers and single-mode multi-core optical fibers.
The few-mode multi-core multiplexing technology combines a multi-core multiplexing technology and a few-mode multiplexing technology. A plurality of few-mode fiber cores are arranged in a cladding of the few-mode multi-core fiber, and each fiber core can simultaneously transmit a plurality of LP (Linear polarization). Its advantages include: 1. the high spectrum efficiency far exceeding the single fiber transmission capacity can be obtained by multiplying the number of the fiber cores and the number of the modes; 2. the method can compromise the crosstalk damage and refractive index design difficulty of mode multiplexing high-order mode multiplexing and the design and manufacturing difficulty of multi-core multiplexing high-density fiber core multiplexing on the optical fiber; 3. the requirement for receiver MIMO-DSP (Multiple Input Multiple Output-Digital Signal Processing) equalization Processing can be reduced under the same spatial multiplexing channel. When multiple dimensions such as mode multiplexing, multi-core multiplexing, wavelength division multiplexing and the like are combined, the capacity of the optical transmission system is further refreshed.
However, the few-mode multi-core multiplexing system has some problems: 1. the platform compatibility of the mode multiplexing device and the multi-core fan-in fan-out device is poor; 2. the complexity of the space division multiplexing device is high due to the mode multiplexing device and the multi-core fan-in and fan-out device.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a polymer mode multiplexer, a space division multiplexing device and a space division multiplexing method, which improve the compatibility of mode multiplexing and multi-core multiplexing, combine the functions of fan-in and fan-out of a multi-core fan and the functions of the mode multiplexer and reduce the complexity of the whole device.
To achieve the above object, in one aspect, a polymer mode multiplexer is provided, including:
each single mode waveguide is connected with an input port, two ends of each few-mode waveguide are respectively connected with an input port and an output port, the single mode waveguides and the few-mode waveguides are arranged in a polymer cladding, the polymer cladding is a photoelectric polymer with the refractive index of 1.4-1.7, and a section of coupling area is formed between the single mode waveguides and the few-mode waveguides;
and the optical signal entering the single mode waveguide is subjected to mode conversion in the coupling area and enters the few-mode waveguide, the residual optical signal is led out through the tip of the single mode waveguide, and the optical signal entering the few-mode waveguide is not subjected to mode conversion.
Preferably, the width of the single-mode waveguide ranges from 1 μm to 12 μm, and the width of the few-mode waveguide ranges from 3 μm to 12 μm; the heights of the single-mode waveguide and the few-mode waveguide are the same, and the height range is 3-15 mu m; the length range of the coupling area is 300 mu m-10 mm; the distance between the single-mode waveguide and the few-mode waveguide is 200 nm-2 mu m.
Preferably, the number of mode multiplexes of the polymer mode multiplexer is equal to the number of input ports of the polymer mode multiplexer.
On the other hand, a space division multiplexing device based on the polymer mode multiplexer is provided, which comprises a single-mode fiber, a polymer mode multiplexer and a multi-core few-mode fiber, wherein the number of the single-mode fibers divided by the number of the mode multiplexing of the polymer mode multiplexer is equal to the number of the cores of the multi-core few-mode fiber is equal to the number of the polymer mode multiplexers;
the single mode optical fiber is used for being divided into a plurality of groups, and optical signals of each group enter an input port of a polymer mode multiplexer; the polymer mode multiplexer is used for coupling optical signals in the single-mode optical fiber to the multi-core few-mode optical fiber after mode multiplexing.
Preferably, the number of the single-mode optical fibers is greater than or equal to 4, the number of the polymer mode multiplexers is greater than or equal to 2, and the number of the polymer mode multiplexers is greater than or equal to 2.
Preferably, when the mode multiplexing number of the polymer mode multiplexer is 2 and the number of the cores of the multicore few-mode optical fiber is 4, the number of the single-mode optical fibers is 8, and the 8 single-mode optical fibers are divided into 4 groups, each group includes two single-mode optical fibers, the number of the polymer mode multiplexer is 4, and each polymer mode multiplexer has two input ports.
Preferably, when the mode multiplexing number of the polymer mode multiplexer is 3 and the number of cores of the multicore few-mode optical fiber is 7, the number of the single-mode optical fibers is 21, and the 21 single-mode optical fibers are divided into 7 groups of 3 single-mode optical fibers, the number of the polymer mode multiplexers is 7, and each polymer mode multiplexer has 3 input ports.
Preferably, when the mode multiplexing number of the polymer mode multiplexer is 3 and the number of cores of the multicore few-mode optical fiber is 4, the number of the single-mode optical fibers is 12, and the 12 single-mode optical fibers are divided into 4 groups of 3 single-mode optical fibers, the number of the polymer mode multiplexers is 4, and each polymer mode multiplexer has 3 input ports.
In another aspect, a space division multiplexing method based on the space division multiplexing device is provided, which includes the steps of:
calculating the number of single-mode fibers according to the number of fiber cores of the multi-core few-mode fibers and the mode multiplexing number of the polymer mode multiplexer;
equally dividing a plurality of single-mode fibers into a plurality of groups, wherein the number of the groups of the single-mode fibers is equal to the number of the polymer mode multiplexers, and an optical signal of each group of the single-mode fibers enters an input port of one polymer mode multiplexer;
each polymer mode multiplexer converts a fundamental mode in a plurality of single-mode fibers into a high-order mode and carries out mode multiplexing, and then the high-order mode is transmitted to a fiber core of a multi-core few-mode fiber through an output port, so that multi-core multiplexing is achieved.
Preferably, in each polymer mode multiplexer, the single-mode waveguide receives an optical signal from the input port, the optical signal undergoes mode conversion through the coupling region, enters the few-mode waveguide, and the residual optical signal is led out through the tip of the single-mode waveguide; the few-mode waveguide does not perform mode conversion on an optical signal received from the input port.
One of the above technical solutions has the following beneficial effects:
the polymer cladding of the polymer mode multiplexer adopts photoelectric polymer with the refractive index of 1.4-1.7, so that the polymer mode multiplexer can be used as a polymer platform for realizing mode multiplexing and multi-core multiplexing, and the space division multiplexing device based on the polymer mode multiplexer can combine the functions of fan-in and fan-out of the multi-core and the mode multiplexer together, thereby realizing the dense space division multiplexing function and reducing the complexity of the whole device.
Moreover, one space division multiplexing device can fuse multiple dimensions such as multiple cores, modes, wavelengths and the like, and compared with the multi-core fan-in fan-out device required by multi-core multiplexing and the mode multiplexing device required by mode multiplexing in the prior art, the space division multiplexing device solves two kinds of multiplexing, and is more compact in structure, efficient in performance and low in cost.
Drawings
FIG. 1 is a schematic top view of a polymer mode multiplexer according to one embodiment of the present invention;
FIG. 2 is a schematic side view of FIG. 1;
FIG. 3 is a schematic top view of another embodiment of a polymer mode multiplexer according to the present invention;
FIG. 4 is a side view of FIG. 3;
fig. 5 is a schematic diagram of a spatial division multiplexing device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a space division multiplexing device according to another embodiment of the present invention.
Reference numerals:
1. a polymer mode multiplexer; 10 a single mode waveguide; 12. a few-mode waveguide; 13. a polymer cladding; 11. a first single waveguide; 11', a second single waveguide; 2. a single mode optical fiber; 3. a four-core few-mode optical fiber; 4. a seven-core few-mode optical fiber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention provides a polymer mode multiplexer which comprises at least one single-mode waveguide and a few-mode waveguide, wherein one end of each single-mode waveguide is connected with an input port, the other end of each single-mode waveguide is provided with a tip, and two ends of each few-mode waveguide are respectively connected with an input port and an output port. The single-mode waveguide and the few-mode waveguide are arranged in a polymer cladding, and the polymer cladding is a photoelectric polymer with the refractive index of 1.4-1.7. A section of coupling region is formed between each single-mode waveguide and few-mode waveguide.
The optical signal entering the single mode waveguide is subjected to mode conversion in the coupling area and enters the few-mode waveguide, the residual optical signal is led out through the tip end of the single mode waveguide, and the optical signal entering the few-mode waveguide is not subjected to mode conversion.
The number of waveguides (including single-mode waveguides and few-mode waveguides) is equal to the number of mode multiplexing of the polymer mode multiplexer, which is equal to the number of input ports of the polymer mode multiplexer. The number of mode multiplexes indicates how many modes the polymer mode multiplexer supports.
Compared with other platforms such as silicon base, silicon nitride and the like, the polymer has refractive index closer to that of the optical fiber, so that the polymer is more suitable for coupling of the multi-core optical fiber. Meanwhile, the refractive index of the polymer material can be adjusted between 1.4-1.7, so that a waveguide and a cladding structure with refractive index difference are designed, and a mode multiplexing function is realized by designing the waveguide structure and the coupling region. Also, currently, many polymer materials have international certifications for thermal stability, chemical stability and safety, and thus, the polymer mode multiplexer is a preferred polymer platform for realizing mode multiplexing and multi-core multiplexing.
Furthermore, in the polymer mode multiplexer, the width range of the single-mode waveguide is 1-12 μm, and the width range of the few-mode waveguide is 3-12 μm; the heights of the single-mode waveguide and the few-mode waveguide are the same, and the height range is 3-15 mu m; the length range of the coupling area is 300 mu m-10 mm; the spacing of the single mode waveguide and the few mode waveguide ranges from 200nm to 2 μm, and refers to the spacing of the coupling region positions.
The polymer mode multiplexer has a function of converting a fundamental mode in a plurality of single-mode fibers into a high-order mode and performing mode multiplexing. In some embodiments, the polymer mode multiplexer may be a directional-coupling type mode multiplexer.
As shown in fig. 1 and 2, an embodiment of a polymer mode multiplexer 1 is provided. In this embodiment, the number of mode multiplexes is 2, and the polymer mode multiplexer 1 includes a single-mode waveguide 10, a few-mode waveguide 12, and a polymer cladding 13. For ease of understanding, only the ends of the single mode waveguide 10 and few mode waveguide 12 are illustrated in fig. 2. Wherein, the heights of the single-mode waveguide 10 and the few-mode waveguide 12 are both H, and the range of H is 3-15 μm; the width of the single mode waveguide 10 is wa，waThe range of (A) is 1 to 12 μm; the few-mode waveguide 12 has a width wb，wbThe range of (A) is 3 to 12 μm; the interval between the single-mode waveguide 10 and the few-mode waveguide 12 is gap, and the range of the gap is 200 nm-2 mu m; the length of the coupling region of the single mode waveguide 10 and the few mode waveguide 12 is L, and the range of L is 300 mu m-10 mm. The optical signal entering the single mode waveguide 10 through the input port enters the few-mode waveguide 2 through mode conversion in the coupling region, the residual optical signal is led out through the waveguide tip, and the optical signal entering the few-mode waveguide 2 through the other input port is only transmitted without mode conversion.
Another embodiment of a polymer mode multiplexer 1 is provided, as shown in fig. 3 and 4. In the present embodiment, the number of mode multiplexes is 3, and the polymer mode multiplexer 1 includes two single-mode waveguides (a first single waveguide 11 and a second single waveguide 11'), one few-mode waveguide 12, and a polymer cladding 13. For ease of understanding, only the ends of two single mode and few mode waveguides are illustrated in FIG. 4. The heights of the first single waveguide 11, the second single waveguide 11' and the few-mode waveguide 12 are all H, and the range of H is 3-15 μm. The first single waveguide 11 has a width waA second single waveguide 11' having a width wcBoth widths are in the range of 1 μm to 12 μm, and waAnd wcEither the same or different. Few mode waveThe width of the guide 12 is wb，wbThe range of (B) is 3 to 12 μm. The first single waveguide 11 and the few-mode waveguide 12 have gap between them1The second single waveguide 11' and the few-mode waveguide 12 are spaced apart by gap2，gap1And gap2All of which range from 200nm to 2 μm, and gap1And gap2Either the same or different. The coupling region length of the first single waveguide 11 and the few-mode waveguide 12 is L1The coupling region length of the second single waveguide 11' and the few-mode waveguide 12 is L2，L1And L2All of which range from 300 μm to 10mm, and L1And L2Either the same or different. The optical signals input into the first single waveguide 11 and the second single waveguide 11' respectively undergo mode conversion through corresponding coupling regions, then enter the few-mode waveguide 12, and the residual optical signals are led out through the tip of the single-mode waveguide; the optical signal input to the few-mode waveguide 2 is transmitted without mode conversion.
Based on the polymer mode multiplexer, the invention further provides a space division multiplexing device, which comprises a single-mode fiber, a polymer mode multiplexer and a multi-core few-mode fiber, wherein the number of the single-mode fibers is divided by the number of the mode multiplexing of the polymer mode multiplexer, which is the number of the cores of the multi-core few-mode fiber, which is the number of the polymer mode multiplexers. The single mode optical fiber is used for being divided into a plurality of groups, and light of each group enters an input port of the polymer mode multiplexer; the polymer mode multiplexer is used for multiplexing optical signals in the single-mode optical fiber in a mode and then coupling the optical signals into the multi-core few-mode optical fiber so as to achieve multi-core multiplexing.
Specifically, the number of the single-mode fibers is not less than 4, the number of the polymer mode multiplexers is not less than 2, and the number of the mode multiplexes of the polymer mode multiplexers is not less than 2.
As shown in fig. 5, when the number of mode multiplexes is 2 and the multicore few-mode fiber is a four-core few-mode fiber 3 (i.e., the number of cores is 4), the number of single-mode fibers 2 is 8. The 8 single mode fibres are divided into 4 groups of two, only two single mode fibres 2 of the same group being shown in figure 5 for clarity. At this time, each group of two single-mode fibers 2 corresponds to one polymer mode multiplexer 1 corresponding to 4 polymer mode multiplexers 1, and each polymer mode multiplexer 1 includes two input ports and one output port. In each group, the optical signal of one single-mode fiber 2 is transmitted from one input port to the single-mode waveguide, and the optical signal of the other single-mode fiber 2 is transmitted from the other input port to the few-mode waveguide. The optical signal entering the single-mode waveguide is subjected to mode conversion through the coupling region, then enters the few-mode waveguide, and the residual optical signal is led out through the tip end of the single-mode waveguide; the optical signals entering the input few-mode waveguide are only transmitted without mode conversion, and all the optical signals in the few-mode waveguide are output from the output port and coupled with one fiber core of the four-core few-mode optical fiber 3. Finally, the coupling of the signals of the 8 single-mode fibers to the single multi-core few-mode fiber is realized, and the dense space division multiplexing function is realized.
As shown in fig. 6, when the number of modes multiplexed by the polymer mode multiplexer 1 is 3 and the multicore few-mode fiber is the seven-core few-mode fiber 4 (the number of cores of the multicore few-mode fiber is 7), the number of single-mode fibers 2 is 21. The 21 single mode fibres 2 are divided into 7 groups of 3, only 3 single mode fibres 2 of the same group being shown in figure 6 for clarity. Each polymer multiplexer 1 has three input ports and one output port, corresponding to 7 polymer mode multiplexers 1. Each group of 3 single-mode fibers 2 are respectively input into three input ports of a polymer multiplexer 1, are subjected to mode multiplexing in the polymer multiplexer 1, are output through an output port, and are coupled with a fiber core of a seven-core few-mode fiber 4. In addition, the six groups of single-mode fibers 2 are respectively subjected to mode multiplexing through different polymer multiplexers 1 in the same mode, and then are output through an output port and coupled with other fiber cores of the seven-core few-mode fiber 4, so that multi-core multiplexing is achieved. Finally, the coupling of the signals of the 21 single-mode fibers 2 to the single seven-core few-mode fiber 4 is realized, and the dense space division multiplexing function is realized.
In principle, as in the above embodiment, when the number of mode multiplexes of the polymer mode multiplexer 1 is 3 and the number of cores of the multicore few-mode fiber is 4, the number of the single-mode fibers 2 is 12, and the 12 single-mode fibers 2 are divided into 4 groups of 3 single-mode fibers 2, each group has 4 single-mode fibers, and each polymer mode multiplexer has 3 input ports. Each group of 3 single-mode fibers 2 are respectively input into three input ports of a polymer multiplexer 1, are subjected to mode multiplexing in the polymer multiplexer 1, are output through an output port, and are coupled with a fiber core of a four-core few-mode fiber 3. And the other three groups of single-mode fibers 2 are respectively subjected to mode multiplexing through different polymer multiplexers 1 in the same mode, output through an output port and coupled with other fiber cores of the four-core few-mode fiber 3. Finally, the coupling of the signals of the 12 single-mode fibers 2 to the single four-core few-mode fiber 3 is realized, and the dense space division multiplexing function is realized.
Based on the above embodiments of the spatial division multiplexing device, the present invention further provides a spatial division multiplexing method, including the following steps:
s101, calculating the number of single-mode fibers according to the number of fiber cores of the multi-core few-mode fibers and the mode multiplexing number of the polymer mode multiplexer;
s102, equally dividing a plurality of single-mode fibers into a plurality of groups, wherein the number of the groups of the single-mode fibers is equal to the number of the polymer mode multiplexers, and an optical signal of each group of the single-mode fibers enters an input port of one polymer mode multiplexer;
and S103, each polymer mode multiplexer converts a basic mode in a plurality of single-mode optical fibers into a high-order mode for multiplexing, and then transmits the high-order mode to a fiber core of a multi-core few-mode optical fiber through an output port.
In each polymer mode multiplexer, a single-mode waveguide receives an optical signal from an input port, the optical signal undergoes mode conversion through a coupling area and enters a few-mode waveguide, and a residual optical signal is led out through the tip of the single-mode waveguide. The few-mode waveguide does not perform mode conversion on an optical signal received from the input port.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (10)
1. A polymer mode multiplexer, comprising:
each single mode waveguide is connected with an input port, two ends of each few-mode waveguide are respectively connected with an input port and an output port, the single mode waveguides and the few-mode waveguides are arranged in a polymer cladding, the polymer cladding is a photoelectric polymer with the refractive index of 1.4-1.7, and a section of coupling area is formed between the single mode waveguides and the few-mode waveguides;
and the optical signal entering the single mode waveguide is subjected to mode conversion in the coupling area and enters the few-mode waveguide, the residual optical signal is led out through the tip of the single mode waveguide, and the optical signal entering the few-mode waveguide is not subjected to mode conversion.
2. The polymer mode multiplexer of claim 1, wherein said single mode waveguide has a width in the range of 1 μm to 12 μm, and said few mode waveguide has a width in the range of 3 μm to 12 μm; the heights of the single-mode waveguide and the few-mode waveguide are the same, and the height range is 3-15 mu m; the length range of the coupling area is 300 mu m-10 mm; the distance between the single-mode waveguide and the few-mode waveguide is 200 nm-2 mu m.
3. The polymer mode multiplexer of claim 1, wherein a number of modes multiplexed by the polymer mode multiplexer is equal to a number of input ports of the polymer mode multiplexer.
4. A space division multiplexing device based on the polymer mode multiplexer of claim 1, comprising a single mode fiber, a polymer mode multiplexer, and a multicore few-mode fiber, wherein the number of single mode fibers divided by the number of mode multiplexes of the polymer mode multiplexer is equal to the number of cores of the multicore few-mode fiber is equal to the number of polymer mode multiplexers;
the single mode optical fiber is used for being divided into a plurality of groups, and optical signals of each group enter an input port of a polymer mode multiplexer; the polymer mode multiplexer is used for coupling optical signals in the single-mode optical fiber to the multi-core few-mode optical fiber after mode multiplexing.
5. The spatial multiplexing device of claim 4 wherein the number of single mode fibers is equal to or greater than 4, the number of polymer mode multiplexers is equal to or greater than 2, and the number of mode multiplexes of polymer mode multiplexers is equal to or greater than 2.
6. The spatial multiplexing device of claim 4, wherein the number of modes multiplexed by the polymer mode multiplexer is 2, and the number of cores of the multicore few-mode optical fiber is 4, the number of single-mode optical fibers is 8, and the 8 single-mode optical fibers are divided into 4 groups of two single-mode optical fibers each, and the number of polymer mode multiplexers is 4, and each polymer mode multiplexer has two input ports.
7. The spatial multiplexing device of claim 4, wherein the number of modes multiplexed by the polymer mode multiplexer is 3, and when the number of cores of the multicore few-mode optical fiber is 7, the number of single-mode optical fibers is 21, and the 21 single-mode optical fibers are divided into 7 groups of 3 single-mode optical fibers, and the number of polymer mode multiplexers is 7, each polymer mode multiplexer having 3 input ports.
8. The spatial multiplexing device of claim 4, wherein the number of modes multiplexed by the polymer mode multiplexer is 3, and when the number of cores of the multicore few-mode optical fiber is 4, the number of single-mode optical fibers is 12, and the 12 single-mode optical fibers are divided into 4 groups of 3 single-mode optical fibers, and the number of polymer mode multiplexers is 4, and each polymer mode multiplexer has 3 input ports.
9. A space division multiplexing method based on the space division multiplexing device according to claim 4, characterized by comprising the steps of:
calculating the number of single-mode fibers according to the number of fiber cores of the multi-core few-mode fibers and the mode multiplexing number of the polymer mode multiplexer;
equally dividing a plurality of single-mode fibers into a plurality of groups, wherein the number of the groups of the single-mode fibers is equal to the number of the polymer mode multiplexers, and an optical signal of each group of the single-mode fibers enters an input port of one polymer mode multiplexer;
each polymer mode multiplexer converts a fundamental mode in a plurality of single-mode fibers into a high-order mode and carries out mode multiplexing, and then the high-order mode is transmitted to a fiber core of a multi-core few-mode fiber through an output port, so that multi-core multiplexing is achieved.
10. A space division multiplexing method according to claim 9 wherein in each polymer mode multiplexer, a single mode waveguide receives an optical signal from an input port, the optical signal undergoes mode conversion through a coupling region to enter a few-mode waveguide, and a residual optical signal is extracted through a tip of the single mode waveguide; the few-mode waveguide does not perform mode conversion on an optical signal received from the input port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111356235.0A CN114089472A (en) | 2021-11-16 | 2021-11-16 | Polymer mode multiplexer, space division multiplexing device and space division multiplexing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111356235.0A CN114089472A (en) | 2021-11-16 | 2021-11-16 | Polymer mode multiplexer, space division multiplexing device and space division multiplexing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114089472A true CN114089472A (en) | 2022-02-25 |
Family
ID=80301014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111356235.0A Pending CN114089472A (en) | 2021-11-16 | 2021-11-16 | Polymer mode multiplexer, space division multiplexing device and space division multiplexing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114089472A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690312A (en) * | 2022-03-31 | 2022-07-01 | 武汉邮电科学研究院有限公司 | Multi-dimensional multiplexing multi-core optical fiber fan-in fan-out chip |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11183747A (en) * | 1997-12-22 | 1999-07-09 | Nippon Telegr & Teleph Corp <Ntt> | Three-dimensional polymer optical waveguide array and manufacture thereof |
| JPH11295538A (en) * | 1998-04-07 | 1999-10-29 | Japan Aviation Electronics Ind Ltd | 2-wavelength optical multiplexer-multiplexer |
| JP2015114548A (en) * | 2013-12-12 | 2015-06-22 | 日本電信電話株式会社 | Optical multiplexer/demultiplexer and optical communication system |
| CN105467520A (en) * | 2015-12-15 | 2016-04-06 | 武汉邮电科学研究院 | Broadband polarization beam splitter/combiner based on gradient waveguide directional coupler |
| CN109445026A (en) * | 2018-12-28 | 2019-03-08 | 武汉邮电科学研究院有限公司 | Mode conversion and multiplexer based on plasma structure |
| CN110927868A (en) * | 2019-11-15 | 2020-03-27 | 武汉邮电科学研究院有限公司 | Directional coupling-based plasma mode conversion and multiplexer |
| CN112946824A (en) * | 2021-02-25 | 2021-06-11 | 吉林大学 | Three-dimensional mode separator/multiplexer based on silicon-based optical waveguide and preparation method thereof |
| CN113050223A (en) * | 2019-12-26 | 2021-06-29 | 中兴通讯股份有限公司 | Polymer waveguide connector, manufacturing method thereof and connector set |
| CN113311537A (en) * | 2021-06-22 | 2021-08-27 | 桂林电子科技大学 | Polymer three-mode multiplexer based on cascade conical coupler |
-
2021
- 2021-11-16 CN CN202111356235.0A patent/CN114089472A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11183747A (en) * | 1997-12-22 | 1999-07-09 | Nippon Telegr & Teleph Corp <Ntt> | Three-dimensional polymer optical waveguide array and manufacture thereof |
| JPH11295538A (en) * | 1998-04-07 | 1999-10-29 | Japan Aviation Electronics Ind Ltd | 2-wavelength optical multiplexer-multiplexer |
| JP2015114548A (en) * | 2013-12-12 | 2015-06-22 | 日本電信電話株式会社 | Optical multiplexer/demultiplexer and optical communication system |
| CN105467520A (en) * | 2015-12-15 | 2016-04-06 | 武汉邮电科学研究院 | Broadband polarization beam splitter/combiner based on gradient waveguide directional coupler |
| CN109445026A (en) * | 2018-12-28 | 2019-03-08 | 武汉邮电科学研究院有限公司 | Mode conversion and multiplexer based on plasma structure |
| CN110927868A (en) * | 2019-11-15 | 2020-03-27 | 武汉邮电科学研究院有限公司 | Directional coupling-based plasma mode conversion and multiplexer |
| CN113050223A (en) * | 2019-12-26 | 2021-06-29 | 中兴通讯股份有限公司 | Polymer waveguide connector, manufacturing method thereof and connector set |
| CN112946824A (en) * | 2021-02-25 | 2021-06-11 | 吉林大学 | Three-dimensional mode separator/multiplexer based on silicon-based optical waveguide and preparation method thereof |
| CN113311537A (en) * | 2021-06-22 | 2021-08-27 | 桂林电子科技大学 | Polymer three-mode multiplexer based on cascade conical coupler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690312A (en) * | 2022-03-31 | 2022-07-01 | 武汉邮电科学研究院有限公司 | Multi-dimensional multiplexing multi-core optical fiber fan-in fan-out chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3208960B1 (en) | Mode converter | |
| CN102844695A (en) | Multimode optical coupler interfaces | |
| Takahashi et al. | Uncoupled 4-core fibre with ultra-low loss and low inter core crosstalk | |
| CN104459881A (en) | Wavelength division multiplexing type silicon substrate optical receiving chip insensitive to polarization | |
| US7630643B2 (en) | Multimode optical transmission system and multimode optical transmission method | |
| CN102183821A (en) | Arrayed waveguide grating wavelength division multiplexer | |
| US6049646A (en) | Integrated burster multiplexer duplexer device for multicore fibers | |
| JP3344446B2 (en) | Optical transceiver module | |
| Kopp et al. | Pitch reducing optical fiber array for dense optical interconnect | |
| CN114089472A (en) | Polymer mode multiplexer, space division multiplexing device and space division multiplexing method | |
| CN104969565A (en) | Wavelength-division multiplexing (wdm) receiver device and passive optical network system | |
| CN101741475B (en) | Fiber-to-the-home planar lightwave circuit triplexer | |
| Tottori et al. | Integrated optical connection module for 7-core multi-core fiber and 7 single mode fibers | |
| JP3391650B2 (en) | Optical splitter | |
| CN216052278U (en) | Four-core lens optical fiber for silicon optical chip and silicon optical chip packaging structure | |
| CN201654271U (en) | Planar optical waveguide type single-fiber three-way multiplexer used for fiber to the home | |
| CN110941048B (en) | High extinction ratio coarse wavelength division multiplexer/demultiplexer based on multi-mode interference principle | |
| CN112596254B (en) | Compact polarization beam splitter based on photonic crystal | |
| CN210109383U (en) | Four-channel array waveguide grating wavelength division demultiplexer | |
| Tottori et al. | Multi functionality demonstration for multi core fiber fan-in/fan-out devices using free space optics | |
| Jung et al. | All-fiber optical interconnection for dissimilar multicore fibers with low insertion loss | |
| CN1215670C (en) | Coarse wave division complexing apparatus and preparation method of its used conpler | |
| Shikama et al. | Low-loss fiber-bundle-type fan-in/fan-out device for 6-mode 19-core fiber | |
| Itoh et al. | 1-square-inch 100GHz 40ch VMUX/DEMUX based on single-chip PLC integration with 2.5%-Delta silica-based waveguides | |
| Lee et al. | PLC platform for bidirectional transceiver with wide multimode output waveguide to receiver |
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 |