Waveguide network structure and optical chip based on parallel microring tunable basic unit

Abstract

The invention provides a waveguide network structure and an optical chip based on parallel micro-ring adjustable basic units, which relate to the field of optical computing and include: at least one network unit, each network unit includes at least one adjustable basic unit; the adjustable basic unit includes: two waveguides arranged in parallel; at least one parallel micro-ring group, which is arranged between the two waveguides along the extension direction of the waveguides and coupled with the two waveguides; at least two parallel micro-ring groups are not coupled with each other, each parallel micro-ring group includes at least two micro-ring resonators, and at least two micro-ring resonators are arranged along the extension direction of the waveguides and coupled with each other; a phase modulator is arranged in a coupling area between the parallel micro-ring group and the waveguide, a coupling area between the micro-ring resonators, and a preset area on the micro-ring resonator, and the phase modulator is used to independently adjust the coupling coefficient and phase of the adjustable basic unit, so that the adjustable basic unit can be configured as needed between a straight-through state, a cross state, and a partial coupling state.

Description

Technical Field

[0001] The present invention relates to the field of optical computing technology, and in particular to a waveguide network structure and an optical chip based on parallel micro-ring adjustable basic units. Background Art

[0002] With the further development of information technology, applications such as large models, artificial intelligence, the Internet of Things, and data centers urgently need the ability to quickly transmit and process massive amounts of data at low cost. However, due to the limitations of physical limits, microelectronics technology is gradually unable to meet the increasing demand for computing power. In this context, due to the advantages of light such as large bandwidth, low power consumption, multiple multiplexing dimensions, and low susceptibility to electromagnetic interference, integrated optics has become the best candidate to solve this problem. In the early days of the development of integrated optics, application-specific photonic integrated circuits (ASPICs) roughly followed the development process of ASICs in the integrated circuit field, but because the research and development of ASPICs often requires multiple design-tapeout-test cycles, it has a very high time cost and economic cost. This means that only large-scale application scenarios such as data centers and transceiver modules can offset the R&D costs, and it is difficult to achieve cost effects for small-scale and medium-scale application scenarios. Summary of the invention

[0003] In view of the above problems, the present invention provides a waveguide network structure and an optical chip based on parallel micro-ring adjustable basic units, which are used to at least partially solve the above technical problems.

[0004] A first aspect of an embodiment of the present invention provides a waveguide network structure based on parallel micro-ring adjustable basic units, which includes: at least one network unit, each network unit includes at least one adjustable basic unit; each adjustable basic unit includes: two waveguides arranged in parallel; at least one parallel micro-ring group, which is arranged between the two waveguides along the extension direction of the waveguide and coupled with the two waveguides; when the number of parallel micro-ring groups is at least two, at least two parallel micro-ring groups are not coupled with each other, and each parallel micro-ring group includes at least two micro-ring resonators, which are arranged along the extension direction of the waveguide and coupled with each other; a phase modulator is arranged in a coupling area between the parallel micro-ring group and the waveguide, a coupling area between the micro-ring resonators, and a preset area on the micro-ring resonator, and the phase modulator is configured to independently adjust the coupling coefficient and phase of the adjustable basic unit so that the adjustable basic unit can be configured as needed between a straight-through state, a cross state, and a partially coupled state.

[0005] According to an embodiment of the present invention, when the adjustable basic unit operates in a through state, light input from one port of one waveguide of two waveguides arranged in parallel is output from another port of the same waveguide; when the adjustable basic unit operates in a cross state, light input from one port of one waveguide of two waveguides arranged in parallel is output from at least one port of the other waveguide; when the adjustable basic unit operates in a partially coupled state, light input from one port of one waveguide of two waveguides arranged in parallel is output from another port of the same waveguide and from at least one port of the other waveguide.

[0006] According to an embodiment of the present invention, the number of microrings with different resonant wavelengths in the microring resonator is equal to the number of wavelength division multiplexing wavelengths of the waveguide network structure, and the total number of microring resonators may be greater than or equal to the number of wavelengths.

[0007] According to an embodiment of the present invention, the shape of the microring resonator includes a circular ring, an elliptical shape or a racetrack shape, at least two microring resonators in the same parallel microring group have the same or different shapes, and the shapes of microring resonators in different parallel microring groups are the same or different.

[0008] According to an embodiment of the present invention, the shape of the waveguide structure of the microring resonator includes at least a strip shape or a ridge shape, the shape of the waveguide structure of two microring resonators in the same parallel microring group is the same or different, and the shape of the waveguide structure of the microring resonators between different parallel microring groups is the same or different.

[0009] According to an embodiment of the present invention, the types of waveguide network structures include square networks, triangular networks, hexagonal networks, Clements networks similar to Mach-Zehnder interferometers, Reck networks similar to Mach-Zehnder interferometers, or a combination of at least two of the above networks or a network isomorphic to the above networks.

[0010] According to an embodiment of the present invention, the phase modulator includes a thermo-optic phase modulator, an electro-optic phase modulator, and an opto-mechanical phase modulator.

[0011] According to an embodiment of the present invention, the waveguide comprises a strip waveguide or a ridge waveguide.

[0012] According to an embodiment of the present invention, the material of the waveguide network structure includes SOI, silicon nitride, lithium niobate or indium phosphide.

[0013] A second aspect of an embodiment of the present invention provides an optical chip, including: a waveguide network structure, wherein the waveguide network structure adopts the waveguide network structure based on parallel micro-ring adjustable basic units as described above.

[0014] The waveguide network structure and optical chip based on parallel micro-ring adjustable basic units provided by the present invention have at least the following technical effects:

[0015] A structure consisting of two parallel waveguides and several parallel microring groups that resonate at different wavelengths and are coupled to the two waveguides is used as an adjustable basic unit. There are several phase modulators in the coupling area between the parallel microring group and the waveguide, the coupling area between the microring resonators, and other areas of the microring. Through the modulation of the phase by these modulators, the coupling coefficient and the phase can be independently adjusted, so that the adjustable basic unit works in different states and realizes different signal processing functions, including but not limited to filtering, matrix operations, etc. And because the resonant wavelengths of different parallel microrings are different and not coupled to each other, the network can be independently configured for different wavelengths. This structure combined with wavelength division multiplexing technology and control algorithms can greatly improve the complexity and flexibility of existing waveguide network functions.

[0016] This waveguide network structure based on the new adjustable basic unit is used as a reconfigurable optical hardware with higher flexibility. Compared with ASPIC, it can greatly reduce the time and economic cost of integrated optical path research and development for certain specific applications, greatly reduce the time required to enter the market, and more easily achieve economies of scale. In addition, compared with the waveguide network constructed with the traditional adjustable basic unit based on Mach-Zehnder Interferometer (MZI), the waveguide network using this new adjustable basic unit has better scalability and can be combined with wavelength division multiplexing technology to achieve higher computing power. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0018] Figure 1 A schematic diagram of the structure of an adjustable basic unit based on parallel micro-rings provided according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic top view of a microring resonator provided according to an embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram shows a top view of a parallel micro-ring group provided according to an embodiment of the present invention;

[0021] Figure 4 A schematic top view of microring resonators between different parallel microring groups provided according to an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram of a layout of a phase modulator provided according to an embodiment of the present invention is shown;

[0023] Figure 6A schematic diagram schematically shows a parallel micro-ring group coupled with two parallel waveguides according to an embodiment of the present invention;

[0024] Figure 7 A schematic diagram showing a structure of a hexagonal waveguide network unit provided according to an embodiment of the present invention;

[0025] Figure 8 A schematic diagram showing a structure of a rectangular waveguide network unit provided according to an embodiment of the present invention;

[0026] Fig. 9 A schematic diagram showing a structure of a triangular waveguide network unit provided according to an embodiment of the present invention;

[0027] Fig.10 Schematically shows a circuit diagram of optical transmission in a Bar state of a single phase modulator coupling region provided according to an embodiment of the present invention;

[0028] Fig.11 A schematic diagram of a light transmission circuit in a Cross state of a single phase modulator coupling region provided according to an embodiment of the present invention is shown;

[0029] Fig.12 A schematic diagram of a light transmission circuit diagram in a TunableCoupling state of a single phase modulator coupling region provided in accordance with an embodiment of the present invention is shown;

[0030] Fig.13 The schematic diagram shows a light transmission circuit diagram of a single adjustable basic unit composed of a single parallel micro-ring group provided according to an embodiment of the present invention in the Bar state.

[0031] Fig.14A A schematic diagram of a light transmission circuit diagram of a single adjustable basic unit composed of a single parallel micro-ring group provided according to an embodiment of the present invention in a Cross state;

[0032] Fig. 14B A schematic diagram of a circuit diagram of optical transmission in a Cross state of a single adjustable basic unit consisting of a single parallel micro-ring group provided according to another embodiment of the present invention is shown;

[0033] Fig. 14C A schematic diagram of a light transmission circuit diagram of a single adjustable basic unit composed of a single parallel micro-ring group provided in accordance with another embodiment of the present invention in a Cross state is shown;

[0034] Fig.15A A schematic diagram of a light transmission line diagram of a single tunable basic unit composed of a single parallel micro-ring group provided according to an embodiment of the present invention in a Tunable Coupling state is shown;

[0035] Fig. 15B A schematic diagram of a light transmission line diagram of a single tunable basic unit composed of a single parallel micro-ring group provided according to another embodiment of the present invention in a Tunable Coupling state is shown;

[0036] Fig. 15C The diagram schematically shows a circuit diagram of optical transmission in a Tunable Coupling state of a single tunable basic unit composed of a single parallel micro-ring group provided according to another embodiment of the present invention. DETAILED DESCRIPTION

[0037] Below, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of embodiments of the present invention. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of concepts of the present invention.

[0038] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0039] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0040] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0041] In order to realize reconfigurable optical hardware, an embodiment of the present invention provides a waveguide network structure based on parallel micro-ring adjustable basic units, including: at least one network unit, each network unit includes at least one adjustable basic unit. Each adjustable basic unit includes: two waveguides arranged in parallel; at least one parallel micro-ring group, arranged between the two waveguides along the extension direction of the waveguide and coupled with the two waveguides; when the number of parallel micro-ring groups is at least two, at least two parallel micro-ring groups are not coupled with each other, each parallel micro-ring group includes at least two micro-ring resonators, and the at least two micro-ring resonators are arranged along the extension direction of the waveguide and coupled with each other; a phase modulator is arranged in the coupling area between the parallel micro-ring group and the waveguide, the coupling area between the micro-ring resonators, and the preset area on the micro-ring resonator, and the phase modulator is configured to independently adjust the coupling coefficient and phase of the adjustable basic unit, so that the waveguide network structure can be configured as needed between the straight-through state (bar state), the cross state (cross state) and the partial coupling state (tunable coupling state).

[0042] Based on the above embodiment, the two parallel waveguides may include strip waveguides or ridge waveguides. The present invention does not limit the specific shape. It only needs to ensure that the waveguides are well coupled with the parallel microring groups and the microring resonators are well coupled with each other.

[0043] Based on the above embodiment, the number of microrings with different resonant wavelengths in the microring resonator is equal to the number of wavelength division multiplexing wavelengths of the waveguide network structure, and the total number of microring resonators can be greater than or equal to the number of wavelengths.

[0044] Figure 1 The schematic diagram shows the structure of an adjustable basic unit based on parallel micro-rings according to an embodiment of the present invention.

[0045] like Figure 1 As shown, the structure of the parallel microring adjustable basic unit may include two parallel straight waveguides and a plurality of spatially discrete parallel microring groups coupled to the two straight waveguides, each parallel microring group includes at least two microring resonators, and the at least two microring resonators are arranged along the extension direction of the waveguide and coupled to each other. Figure 1 Only the first parallel micro-ring group and the last parallel micro-ring group are shown, and the remaining parallel micro-ring groups are represented by ellipsis.

[0046] In one possible implementation, the resonant wavelength of the first parallel microring group is different from that of the last parallel microring group. There is a phase modulator in the coupling region between the parallel microring group and the two straight waveguides, and in the coupling region between the two microring resonators in the parallel microring group, which can be used to change the coupling coefficient. However, the phase modulator introduces an additional phase while changing the coupling coefficient. If independent adjustment of the coupling coefficient and the phase is to be achieved, additional phase modulators can be added to other regions of the microring resonator. By adjusting the coupling coefficient, the working state of the new adjustable basic unit can be changed.

[0047] Figure 2 A top view of a microring resonator provided according to an embodiment of the present invention is schematically shown.

[0048] like Figure 2 As shown, based on the above embodiments, the shape of the microring resonator at least includes a circular ring, an elliptical shape or a racetrack shape, and the present invention does not limit the specific type.

[0049] Figure 3 The top view of a parallel micro-ring group provided according to an embodiment of the present invention is schematically shown.

[0050] like Figure 3 As shown, the shapes of at least two microring resonators in the same parallel microring group are the same or different. For example, the shapes of the two microring resonators in the same parallel microring group can be circular, elliptical or racetrack. For another example, the shape of one microring resonator in the same parallel microring group can be circular, and the shape of the other microring resonator can be elliptical. For another example, the shape of one microring resonator in the same parallel microring group can be circular, and the shape of the other microring resonator can be racetrack. The present invention is not limited to this.

[0051] It should be noted that the shape of the above-mentioned microring resonator, the type of phase modulator, the type of waveguide network structure, etc., cannot cover all shapes or types that can realize various working states of the adjustable basic unit. Variations of the shape of the microring resonator, the type of phase modulator, and the type of waveguide network structure should all fall within the scope of protection required by the present invention.

[0052] Figure 4 The top view of microring resonators between different parallel microring groups provided according to an embodiment of the present invention is schematically shown.

[0053] In an embodiment of the present invention, the shapes of microring resonators in different parallel microring groups are the same or different. Figure 4As shown, for example, between different parallel microring groups, the shape of two microring resonators in one parallel microring group is circular, and the shape of two microring resonators in another parallel microring group is elliptical. For another example, between different parallel microring groups, the shape of one microring resonator in one parallel microring group is circular, and the shape of another microring resonator is elliptical, and the shape of one microring resonator in another parallel microring group is circular, and the shape of another microring resonator is elliptical. The present invention does not limit the specific shape.

[0054] Figure 5 The diagram schematically shows a layout diagram of a phase modulator provided according to an embodiment of the present invention.

[0055] In the embodiment of the present invention, there is no limit to the number of phase modulators in the parallel micro-ring group, but at least the coupling coefficient should be adjustable. For the phase adjustment, whether to adopt an independently adjustable phase modulator configuration scheme can be determined based on whether the application has a demand for the phase.

[0056] like Figure 5 As shown, both side regions of the two microring resonators in the parallel microring group are provided with phase modulators for adjusting the coupling coefficient. It can be understood that both side regions of the two microring resonators in the parallel microring group can also be provided with phase modulators for adjusting the phase.

[0057] Figure 6 The figure schematically shows the coupling between a parallel micro-ring group and two parallel waveguides provided according to an embodiment of the present invention.

[0058] like Figure 5 and Figure 6 As shown, in the embodiment of the present invention, the phase modulator of the parallel micro-ring group and the waveguide coupling region can be a single drive ( Figure 5 ), can also be dual drive ( Figure 6 ), both single-drive and dual-drive can achieve independent regulation of coupling coefficient and phase through their respective corresponding phase modulator configuration schemes. In one possible implementation, the coupling coefficient can be adjusted by a single-drive modulation method, and the phase can be modulated by the phase modulator in the rest of the micro-ring, which can reduce the impact of crosstalk caused by the close proximity of the dual-drive modulation area.

[0059] Based on the above embodiments, the shape of the waveguide structure of the microring resonator includes at least a strip shape or a ridge shape. When the number of the microring resonators is at least two, the shapes of the waveguide structures of at least two microring resonators are the same or different.

[0060] Based on the above embodiments, the phase modulator may include a thermo-optic phase modulator, an electro-optic phase modulator, or an opto-mechanical phase modulator, and the present invention does not limit the specific type.

[0061] Based on the above embodiments, the types of waveguide network structures may include square networks, triangle networks, hexagonal networks, or a combination of at least two of the square networks, triangle networks, and hexagonal networks. It should be understood that in other embodiments, the waveguide network structure may be a combination of the above networks or any structural deformation isomorphic to the above networks, or other waveguide networks.

[0062] Figure 7 The structure of a hexagonal waveguide network unit provided according to an embodiment of the present invention is schematically shown. Figure 8 The structure of a rectangular waveguide network unit provided according to an embodiment of the present invention is schematically shown. Fig. 9 The structure of a triangular waveguide network unit provided according to an embodiment of the present invention is schematically shown.

[0063] like Figure 7-Figure 9 As shown, since the corresponding new adjustable basic unit has two parallel micro-ring groups with different resonant wavelengths, and the two parallel micro-ring groups do not interfere with each other, the waveguide network can be independently configured for different wavelengths with the help of wavelength division multiplexing technology and control algorithm, thereby greatly improving the complexity and flexibility of the network and the processing capacity for massive signals. This is the most significant feature of the present invention compared to the current waveguide network using MZI as the adjustable basic unit, and it is also the most prominent advantage. In addition, since the size of the micro-ring resonator is smaller than that of the MZI, as an additional advantage, the waveguide network structure proposed by the present invention can further improve the integration compared to the existing waveguide network structure.

[0064] Based on the above embodiments, the waveguide network structure can be instantiated on different material platforms, and the materials of the material platform may include SOI, silicon nitride, lithium niobate or indium phosphide.

[0065] On the basis of the above embodiment, when the waveguide network structure works in a straight-through state, light input from one port of one waveguide of two parallel-arranged waveguides is output from another port of the same waveguide.

[0066] When the waveguide network structure operates in the cross state, light input from one port of one waveguide of two parallel-arranged waveguides is output from at least one port of the other waveguide.

[0067] When the waveguide network structure operates in a partially coupled state, light input from one port of one waveguide of two parallel waveguides is output from another port of the same waveguide and from at least one port of the other waveguide.

[0068] Fig.10The schematic diagram shows a circuit diagram of light transmission in the Bar state of a single phase modulator coupling region provided according to an embodiment of the present invention. Fig.11 The diagram schematically shows a circuit diagram of light transmission in a Cross state of a single phase modulator coupling region provided according to an embodiment of the present invention. Fig.12 The schematic diagram shows a circuit diagram of optical transmission in a Tunable Coupling state of a single phase modulator coupling region provided according to an embodiment of the present invention.

[0069] like Figure 10-12 As shown, for example, the two ports on the left side of the phase modulator can be called port 1 (upper port) and port 3 (lower port), and the two ports on the right side can be called port 2 (upper port) and port 4 (lower port). According to the propagation direction of the output light, the three output states are as follows:

[0070] Bar state: light input from port 1 is only output from port 2, or light input from port 3 is only output from port 4, and vice versa;

[0071] Cross state: light input from port 1 is only output from port 4, light input from port 3 is only output from port 2, and vice versa;

[0072] In the Tunable Coupling state, light input from port 1 will be output from ports 2 and 4 at the same time. The specific splitting ratio and phase relationship are related to the working state of the thermal phase shifter. Light input from port 3 will be output from ports 2 and 4 at the same time. The specific splitting ratio and phase relationship are related to the working state of the phase modulator, and vice versa. It should be noted that the above state is established under ideal conditions. In actual use, due to weak reflection and crosstalk, ports that are not marked with light output may also detect extremely weak light signal output, but this has no effect on the overall performance.

[0073] Fig.13 The schematic diagram shows a light transmission circuit diagram of a single adjustable basic unit composed of a single parallel micro-ring group provided according to an embodiment of the present invention in the Bar state.

[0074] Fig.14A The diagram schematically shows a circuit diagram of light transmission in a Cross state of a single adjustable basic unit consisting of a single parallel micro-ring group provided according to an embodiment of the present invention. Fig. 14B The diagram schematically shows a circuit diagram of light transmission in the Cross state of a single adjustable basic unit composed of a single parallel micro-ring group provided according to another embodiment of the present invention. Fig. 14C The diagram schematically shows a circuit diagram of light transmission in the Cross state of a single adjustable basic unit composed of a single parallel micro-ring group provided according to another embodiment of the present invention.

[0075] Fig.15A The diagram schematically shows a circuit diagram of optical transmission in a Tunable Coupling state of a single tunable basic unit composed of a single parallel micro-ring group provided according to an embodiment of the present invention. Fig. 15B The diagram schematically shows a circuit diagram of optical transmission in a Tunable Coupling state of a single tunable basic unit composed of a single parallel micro-ring group provided according to another embodiment of the present invention. Fig. 15C The diagram schematically shows a circuit diagram of optical transmission in a Tunable Coupling state of a single tunable basic unit composed of a single parallel micro-ring group provided according to another embodiment of the present invention.

[0076] like Figure 13-15C As shown, the two ports on the left side of the adjustable basic unit are called port A (upper port) and port C (lower port), and the two ports on the right side are called port B (upper port) and port D (lower port).

[0077] In some possible embodiments, the adjustable basic unit is generally used to implement three types of input-output relationships, and the definitions of these three working states may be, for example:

[0078] like Fig.13 As shown, Bar state: light input from port A will only be output from port B, light input from port C will only be output from port D, and vice versa;

[0079] like Figure 14A-Figure 14C As shown, in Cross state: light input from port A will be output from port C or port D or both. Light input from port C will be output from port A or port B or both, and vice versa.

[0080] like Figure 15A-Figure 15C As shown, in the Tunable state, the light input from port A will only be output from port B, port C, and port D, or the light input from port A will only be output from port B and port C, or the light input from port A will only be output from port B and port D. The light input from port C will only be output from port D, port A, and port B, or the light input from port C will only be output from port D and port A, or the light input from port C will only be output from port D and port B.

[0081] The specific splitting ratio and phase relationship are determined by the working state of the thermal phase modulator, and vice versa.

[0082] It should be noted that, since the adjustable basic unit indicated in the present invention may include more than one parallel micro-ring group corresponding to the same wavelength, the combination of different parallel micro-ring groups can undoubtedly achieve a more complex working state, not limited to the above three working states, which should not be a limitation of the present invention. Those skilled in the art can make any combination according to application requirements.

[0083] Based on the above waveguide network structure, an embodiment of the present invention further provides an optical chip, including: a waveguide network structure, wherein the waveguide network structure adopts the above-mentioned waveguide network structure based on parallel micro-ring adjustable basic units.

[0084] It should be noted that the waveguide network structure provided by the present invention can be applied to application scenarios of multiple wavelengths, and can also be applied to application scenarios of a single wavelength. Technicians in optical computing, optical signal processing and other related fields can perform corresponding applications as needed, such as signal bands, input optical modes, etc. The waveguide network structure provided by the present invention can be used as one or several modules in a large system, or a small part of a large waveguide network.

[0085] For any unfinished details in the optical chip embodiment, please refer to the above-mentioned waveguide network structure Buffon, which will not be repeated here.

[0086] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems and methods according to various embodiments of the present invention. In this regard, each box in the flowchart or block diagram may represent a module, a program segment or a part of a code, and the above-mentioned module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0087] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0088] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A waveguide network structure based on parallel micro-ring adjustable basic units, characterized in that: include: at least one network unit, each network unit comprising at least one adjustable basic unit; Each adjustable base unit includes: Two waveguides arranged in parallel; At least two parallel micro-ring groups are arranged between two waveguides along the extension direction of the waveguide and coupled with the two waveguides; at least two parallel micro-ring groups are not coupled with each other; each parallel micro-ring group includes at least two micro-ring resonators, and the at least two micro-ring resonators are arranged along the extension direction of the waveguide and coupled with each other; the number of micro-rings with different resonant wavelengths in the parallel micro-ring groups is equal to the number of wavelength division multiplexing wavelengths of the waveguide network structure, the total number of micro-ring resonators is greater than or equal to the number of wavelengths, and the resonant wavelengths of the first parallel micro-ring group and the last parallel micro-ring group are different; A phase modulator is arranged in a coupling region between the parallel microring group and the waveguide, a coupling region between microring resonators, and a preset region on the microring resonator, and the phase modulator is configured to independently adjust the coupling coefficient and phase of the adjustable basic unit so that the adjustable basic unit can be configured as needed between a straight-through state, a cross state, and a partially coupled state.

2. The waveguide network structure according to claim 1, characterized in that: When the adjustable basic unit operates in the through state, light input from one port of one of the two parallel waveguides is output from the other port of the same waveguide; When the adjustable basic unit operates in the crossed state, light input from one port of one waveguide of two parallel waveguides is output from at least one port of the other waveguide; when the adjustable basic unit operates in the partially coupled state, light input from one port of one waveguide of two parallel waveguides is output from another port of the same waveguide and from at least one port of the other waveguide.

3. The waveguide network structure according to claim 1 or 2, characterized in that: The shapes of the microring resonators include circular rings, elliptical shapes or racetrack shapes. The shapes of at least two microring resonators in the same parallel microring group are the same or different, and the shapes of microring resonators in different parallel microring groups are the same or different.

4. The waveguide network structure according to claim 1 or 2, characterized in that: The shape of the waveguide structure of the microring resonator includes a strip shape or a ridge shape. The shapes of the waveguide structures of at least two microring resonators in the same parallel microring group are the same or different. The shapes of the waveguide structures of microring resonators in different parallel microring groups are the same or different.

5. The waveguide network structure according to claim 1 or 2, characterized in that: The types of the waveguide network structure include a square network, a triangle network, a hexagonal network, a Clements network similar to a Mach-Zehnder interferometer, a Reck network similar to a Mach-Zehnder interferometer, or a combination of at least two of the above networks.

6. The waveguide network structure according to claim 1 or 2, characterized in that: The phase modulator includes a thermo-optic phase modulator, an electro-optic phase modulator, and an opto-mechanical phase modulator.

7. The waveguide network structure according to claim 1 or 2, characterized in that: The waveguide includes a strip waveguide or a ridge waveguide.

8. The waveguide network structure according to claim 1, characterized in that: The material of the waveguide network structure includes SOI, silicon nitride, lithium niobate or indium phosphide.

9. An optical chip, characterized in that: include: A waveguide network structure, wherein the waveguide network structure adopts the waveguide network structure based on the parallel micro-ring adjustable basic unit as described in any one of claims 1 to 8.

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