Optical communication device, optical communication chip and electronic equipment

Abstract

The invention provides an optical communication device, an optical communication chip and electronic equipment, and relates to the technical field of optical communication. The optical communication device comprises an input port, a beam splitter, a first modulation link, a second modulation link, an optical coupler and an output port. Wherein the input end of the beam splitter is connected with the input port. The first output end of the beam splitter is connected with the input end of the first modulation link. And the second output end of the beam splitter is connected with the input end of the second modulation link. The output end of the first modulation link and the output end of the second modulation link are connected with the input end of the optical coupler. And the output end of the optical coupler is connected with the output port. The first modulation link and the second modulation link each include a plurality of different micro-ring modulators connected in series. Distorted coherent optical signals can be divided into two paths through the two modulation links to be subjected to various types of nonlinear processing, so that optical signals with various specific wavelengths are extracted and then are coupled and output through the optical coupler, and modulation and recovery of the coherent optical signals are realized.

Description

Technical Field

[0001] The present application relates to the field of optical communication technologies, and in particular, to an optical communication device, an optical communication chip, and an electronic device. Background Art

[0002] Optical domain signal processing technology has developed rapidly in recent years. Through optical domain signal processing technology, the gradual upgrade from electrical computing to optical computing can be achieved, using light to supplement electricity, improving the computing speed, and reducing the system power consumption. Among them, in order to implement the operation of a neural network in the hardware architecture, currently, the optical domain signal processing system usually considers introducing a reservoir neural network architecture constructed by a microring modulator to execute. However, currently, the reservoir neural network architecture constructed by a microring modulator cannot achieve the modulation and restoration of coherent optical signals. Therefore, there is an urgent need to provide a solution to solve the above problems. Summary of the Invention

[0003] Embodiments of the present application provide an optical communication device, an optical communication chip, and an electronic device to solve the problem that the existing reservoir neural network architecture constructed by a microring modulator cannot achieve the modulation and restoration of coherent optical signals.

[0004] To solve the above problems, the embodiments of the present application provide the following technical solutions:

[0005] In a first aspect, an optical communication device is provided. The optical communication device includes an input port, a beam splitter, a first modulation link, a second modulation link, an optical coupler, and an output port. Among them, the input end of the beam splitter is connected to the input port. The first output end of the beam splitter is connected to the input end of the first modulation link. The second output end of the beam splitter is connected to the input end of the second modulation link. The output ends of the first modulation link and the second modulation link are both connected to the input end of the optical coupler. The output end of the optical coupler is connected to the output port. The first modulation link includes a plurality of different first microring modulators connected in series. The second modulation link includes a plurality of different second microring modulators connected in series. Among them, the input port is used to input a first coherent optical signal. The beam splitter is used to divide the first coherent optical signal into a first optical signal and a second optical signal. The first modulation link can perform amplitude modulation on the first optical signal and output a third optical signal. The second modulation link can perform phase modulation on the second optical signal and output a fourth optical signal. The optical coupler can then output a second coherent optical signal to the output port according to the input third optical signal and fourth optical signal. During the transmission process, the optical signals with different wavelengths in the coherent optical signal will affect each other, resulting in signal distortion of each optical signal carried. Therefore, the above first coherent optical signal is usually a distorted coherent optical signal. Among them, because the microring modulator can perform non-linear processing on the input distorted optical signal, so as to extract the optical signal with a specific wavelength from the distorted optical signal. Therefore, when both the first modulation link and the second modulation link include a plurality of different microring modulators connected in series, different degrees of non-linear processing can be performed on the first optical signal and the second optical signal through the two modulation links respectively, so as to output the third optical signal and the fourth optical signal. Among them, both the third optical signal and the fourth optical signal include a plurality of optical signals with specific wavelengths. Because the wavelengths of the multiple optical signals included in the true signal (i.e., the undistorted coherent optical signal) are known parameters, the above multiple specific wavelengths can be determined according to the wavelengths of the multiple optical signals in the true signal. Based on this, when the optical signals with the above multiple specific wavelengths are coupled by the optical coupler, a coherent optical signal closer to the true signal (i.e., the above second coherent optical signal) can be restored.

[0006] In some embodiments, the output end of at least one first microring modulator in the first modulation link is also directly connected to the input end of the optical coupler through a first Mach-Zehnder interferometer, and / or the output end of at least one second microring modulator in the second modulation link is also directly connected to the input end of the optical coupler through a second Mach-Zehnder interferometer. In this way, the intensity of the optical signal output by the microring modulator can be adjusted by the first Mach-Zehnder interferometer, so as to further compensate and repair the optical signal output by the first modulation link, making the coherent optical signal output by the output port closer to the real coherent optical signal. In addition, the intensity of the optical signal output by the microring modulator can also be adjusted by the second Mach-Zehnder interferometer, so as to further compensate and repair the optical signal output by the second modulation link.

[0007] In some embodiments, the output end of the first modulation link is also connected to the input end of the first modulation link through a third Mach-Zehnder interferometer. And / or, the output end of the second modulation link is also connected to the input end of the second modulation link through a fourth Mach-Zehnder interferometer. In this way, the optical signal output by the output end of the first modulation link can be used as feedback and transmitted to the input end of the first modulation link, and the intensity of the optical signal can be adjusted by the third Mach-Zehnder interferometer, so as to better compensate and restore the optical signal transmitted by the first modulation link. In addition, the optical signal output by the output end of the second modulation link can also be used as feedback and transmitted to the input end of the second modulation link, and the intensity of the optical signal can be adjusted by the fourth Mach-Zehnder interferometer, so as to better compensate and restore the optical signal transmitted by the second modulation link.

[0008] In some embodiments, the first modulation link and the second modulation link are the same or different modulation links. In this way, the transmitted coherent optical signal can be modulated, compensated and repaired synchronously through two identical modulation links, or the transmitted coherent optical signal can be compensated and repaired through two different modulation links, so that the microring modulators needed in the two adjustment links can be better selected according to actual needs to modulate and compensate and repair optical signals of different wavelengths.

[0009] In some embodiments, at least one of the radius, thickness, refractive index of the micro - ring, and the spacing between the micro - ring and the waveguide in each first micro - ring modulator in the first modulation link is different. At least one of the radius, thickness, refractive index of the micro - ring, and the spacing between the micro - ring and the waveguide in each second micro - ring modulator in the second modulation link is different. The non - linear processing ability of the micro - ring modulator is easily affected by various factors such as the radius, thickness, refractive index of the micro - ring, and the spacing between the micro - ring and the waveguide. If at least one of the radius, thickness, refractive index of the micro - ring, and the spacing between the micro - ring and the waveguide of two micro - ring modulators is different, then these two micro - ring modulators can perform non - linear processing on the input optical signal to different degrees, so as to extract optical signals of multiple specific wavelengths from the input optical signal. Therefore, at least one of the radius, thickness, refractive index, etc. of the micro - rings in each micro - ring modulator in the first modulation link and the second modulation link can be set according to the usage requirements of the actual application scenario, so as to extract optical signals of multiple specific wavelengths from the input coherent optical signal.

[0010] In some embodiments, the above - mentioned optical communication device further includes a first optical amplifier disposed between the input port and the input end of the beam splitter. Through the first optical amplifier, the coherent optical signal input from the input port can be amplified according to actual requirements.

[0011] In some embodiments, the above - mentioned optical communication device further includes a second optical amplifier disposed between the first output end of the beam splitter and the input end of the first modulation link; and / or, a third optical amplifier disposed between the second output end of the beam splitter and the input end of the second modulation link. Through the second optical amplifier and the third optical amplifier, the optical signals input into the first modulation link and the second modulation link can be amplified according to actual requirements.

[0012] In some embodiments, a fourth optical amplifier is provided between any two adjacent first micro - ring modulators in the first modulation link; and / or, a fifth optical amplifier is provided between any two adjacent second micro - ring modulators in the second modulation link. Through the fourth optical amplifier and the fifth optical amplifier, the optical signals transmitted between any two adjacent micro - ring modulators in the first modulation link and the second modulation link can be amplified according to actual requirements.

[0013] In some embodiments, the above optical communication device further includes a control circuit. The control circuit includes a first heating circuit. The first heating circuit is used to heat at least one of the first Mach-Zehnder interferometer, the second Mach-Zehnder interferometer, the third Mach-Zehnder interferometer, and the fourth Mach-Zehnder interferometer. Through the above control circuit, the temperature of each Mach-Zehnder interferometer can be adjusted, so as to control the intensity of the optical signal output by each Mach-Zehnder interferometer according to actual needs, realize the compensation and repair of the input signal, and make the optical signal output from the input port closer to the real signal.

[0014] In some embodiments, the control circuit further includes a connection port connected to the first heating circuit, and a controller connected to the connection port. The first heating circuit can be controlled through the controller provided on the optical communication device, without externally connecting a controller during use, making it more convenient to use.

[0015] In some embodiments, the controller is connected to the connection port in a detachable manner. In this way, the user can select the type of controller according to actual needs.

[0016] In some embodiments, the above control circuit further includes a second heating circuit. The second heating circuit is used to heat the first micro-ring modulator and / or the second micro-ring modulator. Through the second heating circuit, the temperature of each micro-ring modulator can be adjusted, so as to control the resonant wavelength of each micro-ring modulator according to actual needs, and thus different nonlinear processing can be performed on the transmitted optical signal.

[0017] In a second aspect, an optical communication chip is provided. The optical communication chip includes a substrate and the optical communication device in any of the above embodiments provided on the substrate.

[0018] In a third aspect, an electronic device is provided. The electronic device includes the optical communication device in any of the above embodiments, a photodetector connected to the optical communication device, and a processor connected to the photodetector.

[0019] For the technical effects brought by the second aspect, the third aspect and possible embodiments, reference can be made to the description of the technical effects brought by the first aspect and possible embodiments above, which will not be elaborated here. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a micro-ring modulator provided by an embodiment of the present application;

[0021] Figure 2 It is a schematic structural diagram of a reservoir neural network provided by an embodiment of the present application;

[0022] Figure 3 Schematic diagram of the structure of an optical communication system provided by an embodiment of the present application;

[0023] Figure 4 Schematic diagram of the structure of a signal compensation and recovery link provided by an embodiment of the present application;

[0024] Figure 5 Schematic diagram of the structure of another signal compensation and recovery link provided by an embodiment of the present application;

[0025] Figure 6 Schematic diagram of the structure of an optical communication device provided by an embodiment of the present application;

[0026] Figure 7 Relationship diagram between the wavelength and signal intensity of a microring modulator provided by an embodiment of the present application;

[0027] Figure 8 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0028] Figure 9 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0029] Figure 10 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0030] Figure 11 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0031] Figure 12 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0032] Figure 13 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0033] Figure 14 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0034] Figure 15 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0035] Figure 16 Schematic diagram of the structure of yet another optical communication device provided by an embodiment of the present application;

[0036] Figure 17 Constellation diagram of 16 - bit quadrature amplitude modulation provided by an embodiment of the present application;

[0037] Figure 18Schematic diagram of the compensation and recovery process of a coherent optical signal provided by an embodiment of the present application;

[0038] Figure 19 Schematic diagram of the structure of an electronic device provided by an embodiment of the present application;

[0039] Figure 20 Schematic diagram of the structure of an optical communication chip provided by an embodiment of the present application. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0041] In order to clearly describe the technical solutions in the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the terms such as "first" and "second" do not limit the quantity and execution order, and the terms such as "first" and "second" do not necessarily mean different. At the same time, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific way for easy understanding.

[0042] When describing some embodiments, expressions such as "coupled", "coupled to" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components have direct physical contact or point contact with each other. Another example is that when describing some embodiments, the term "coupled" may be used to indicate that two or more components have direct physical contact or electrical contact, or may also mean that two or more components do not have direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

[0043] First, some basic concepts related to the embodiments of the present application are explained:

[0044] Micro-ring modulator: Such as Figure 1As shown, the microring modulator 100 is an optical device that does not require an external power supply. It consists of a straight waveguide 110 and a resonant ring 120 (also called a microring). The distance between them can be designed by oneself, and there is no physical connection between them. The input signal is input from the waveguide 110. Since the optical signal is an electromagnetic field, its field strength distribution will penetrate out of the waveguide 110 and then enter the microring. The output signal at the right end of the waveguide 110 consists of two parts: (1) the signal that does not enter the microring; (2) the signal that enters the microring and returns to the waveguide after traveling one (or several) rounds. Since the material, refractive index, radius of the microring, and the distance between the microring and the waveguide can all be designed, the signal transmitted from the microring experiences the nonlinear effect in the microring, making the finally measured output signal diverse.

[0045] Reservoir neural network: Also called reservoir computing neural network. As Figure 2 shown, the reservoir neural network consists of three parts: an input layer, a reservoir layer, and an output layer. The input layer multiplies the input signal by the input weight W in (vector or matrix) and inputs it into the reservoir layer. The reservoir layer consists of one or more interconnected non-linear nodes, which perform non-linear transformation on the input signal and perform non-linear processing on the input signal in a higher dimension. In other words, the input with a one-dimensional dimension is projected onto a higher dimension by multiplying the weight. For example, if the dimension of the input signal is a 1*M vector and there are N non-linear nodes (usually N>M) in the reservoir layer, and the input weight W in is an M*N matrix, then after multiplying the 1*M signal by the input weight matrix, the dimension becomes 1*N. Since N>M, the dimension of the signal becomes higher. The reservoir layer outputs the signal through the output weight W out and enters the final output layer. The biggest feature of the reservoir neural network different from the traditional neural network is that its input weight W in and the connection weights W of each node in the reservoir layer are randomly generated and fixed during each round of operation without training. The only thing that needs to be trained is the weight W out of the output layer. This architecture greatly reduces the number of parameters in the system and also provides the possibility for hardware implementation. During the training process, W in and W can be randomly generated in each round, and only W out is trained. After the training is completed, W in , W, and W out are fixed. Currently, there are mainly two architectures for reservoir neural networks, and the difference lies in the connection method of the middle reservoir layer. As Figure 2 shown in (a) of Figure 2As shown in (b) therein, in another architecture, the neurons in the reservoir layer are arranged and connected in sequence. The difference between this architecture and the architecture in (a) is that it has only one real non-linear node, that is, in the implementation process, a specific non-linear function or physical architecture is required to play the role of the real non-linear node, and the nodes in the rest of the dotted line part are "virtual nodes". The relationship between it and the previous node is that there is a time delay t. The implementation method is that when collecting data from the real non-linear node, it is collected once every time t. If there are several virtual nodes in the network, it will be collected several times at intervals of t.

[0046] The present application will be described in detail below with reference to the accompanying drawings and embodiments:

[0047] As Figure 3 shown, an optical communication system 300 in the field of optical communication technology generally includes a transmitter 310 and a receiver 320. The transmitter 310 includes a driving circuit 311, a light source 312, a modulator 313, a controller 314, etc. The receiver 320 includes a signal compensation and restoration link 321, a photodetector 322, a host 323, etc. When an optical signal needs to be transmitted, the controller 314 can drive the light source 312 to output an optical signal through the driving circuit 311. Then, after the controller 314 controls the modulator 313 to modulate the optical signal, it is transmitted to the signal compensation and restoration link 321 in the receiver 320 through an optical fiber. After the signal compensation and restoration link 321 compensates and restores the received optical signal, it is subjected to photoelectric conversion by the photodetector 322 and transmitted to the host 323 for processing. Among them, the host 323 can be a computer or a processor; the above-mentioned controller 314 can also be a processor. The processor includes, but is not limited to, a central processing unit (CPU), a network processing unit (NPU), a graphics processing unit (GPU), a digital signal processor (DSP), or a general-purpose processor. In the above implementation method, in order to realize the compensation and repair of distorted signals, in the related art, as Figure 4As shown, the signal compensation and recovery link 400 implements a reservoir neural network based on a microring modulator. Exemplarily, there are a total of 16 microring modulators in the reservoir layer 412 of the reservoir neural network, and each microring modulator has a non-linear effect on the input signal. The optical signal input by the input layer 411 is injected into a certain microring modulator among the 16 microring modulators and then transmitted to other microrings by them. The optical signal output by the output layer 413 is connected to a computer or a processor through a photodetector to perform training on the output weights, and the trained output weights are fixed values. Since it is difficult to implement different input weights for signal superposition in the optical domain, the input weights are omitted in this architecture, and the optical domain signal is directly input to each microring node. The implementation process of this architecture is as follows: The input signal is a distorted signal after being transmitted through an optical link. After being input to the reservoir layer for non-linear action, it is output to the output layer for training. The target of training is the real signal (i.e., the undistorted optical signal) sent by the optical transmitter. After training, the output weights (vector or matrix) are obtained. After the training is completed, during normal use, signal compensation is performed. The optical signal output by the reservoir neural network is multiplied by the output weights to obtain the optical signal closest to the real signal, thereby realizing the compensation and recovery of the distorted signal. However, the above solution cannot modulate and recover optical signals of multiple wavelengths in a coherent optical signal.

[0048] Exemplarily, such as Figure 5 As shown, in order to implement the compensation and repair of distorted signals, the signal compensation and recovery link 500 provided by some solutions needs to first perform optoelectronic conversion through the optoelectronic conversion circuit 511 to convert the optical signal into an electrical signal. Secondly, the input weight W is multiplied by the electrical signal in the electrical domain through the adjustment circuit 512 in . Thirdly, the electrical signal is converted into an optical signal through the electro-optical conversion circuit 513. Then, the optical signal is modulated by the Mach-Zehnder modulator 514 (mach-zehnder modulator, MZM) and used as the input signal of the microring modulator 515. Then, after the input signal is non-linearly processed by the microring modulator 515, it is subjected to optoelectronic conversion through the photodetector 516, and data recovery is performed in the electrical domain through the processor 517. However, the above solution requires multiple electro-optical conversions and optoelectronic conversions, reducing the communication efficiency, and at the same time, it cannot modulate and recover optical signals of multiple wavelengths in a coherent optical signal.

[0049] In coherent optical communication, the coherent optical signal transmitted from the transmitter to the receiver is often a distorted signal. This distorted signal needs to be modulated and recovered in order to obtain the signals carried by optical signals of different wavelengths. However, when modulating and recovering a distorted coherent optical signal, two modulation links need to be set to modulate the amplitude and phase of the coherent optical signal respectively and then recover it into a coherent optical signal close to the real signal, and Figure 5The signal compensation and restoration link 500 therein cannot achieve the modulation and restoration of coherent optical signals. Therefore, how to modulate and restore coherent optical signals is an urgent problem to be solved at present.

[0050] To solve the above problems, as Figure 6 shown, an embodiment of the present application provides an optical communication device 600. The optical communication device 600 includes an input port 610, a first modulation link 620, a second modulation link 630, an optical coupler 640, an output port 650, and a beam splitter 660. Among them, the input end of the beam splitter 660 is connected to the input port 610. The first output end of the beam splitter 660 is connected to the input end of the first modulation link 620. The second output end of the beam splitter 660 is connected to the input end of the second modulation link 630. The output ends of the first modulation link 620 and the second modulation link 630 are both connected to the input end of the optical coupler 640 through waveguides. The output end of the optical coupler 640 is connected to the output port 650 through a waveguide. The first modulation link 620 includes a plurality of different first microring modulators connected in series. The second modulation link 630 includes a plurality of different second microring modulators connected in series. Among them, the input port 610 can input a first coherent optical signal. The beam splitter 660 splits the first coherent optical signal into a first optical signal and a second optical signal. The first modulation link 620 can perform amplitude modulation on the first optical signal and output a third optical signal. The second modulation link 630 can perform phase modulation on the second optical signal and output a fourth optical signal. The optical coupler 640 then outputs a second coherent optical signal through the input third optical signal and fourth optical signal, that is, a coherent optical signal close to the real signal (i.e., an undistorted coherent optical signal).

[0051] In a coherent optical communication system employing wavelength division multiplexing (WDM), the coherent optical signal usually consists of optical signals of multiple wavelengths. During the transmission process, the optical signals of different wavelengths in the coherent optical signal will affect each other, resulting in signal distortion of each optical signal carried. Therefore, the above-mentioned first coherent optical signal is usually a distorted coherent optical signal. Among them, since the microring modulator can perform non-linear processing on the input distorted optical signal, so as to extract the optical signal of a specific wavelength from the distorted optical signal. Therefore, when both the first modulation link 620 and the second modulation link 630 include a plurality of different microring modulators connected in series, different degrees of non-linear processing can be performed on the first optical signal and the second optical signal through the two modulation links respectively, so as to output a third optical signal and a fourth optical signal. Among them, both the third optical signal and the fourth optical signal include optical signals of multiple specific wavelengths. Since the wavelengths of the multiple optical signals included in the real signal are known parameters, the above-mentioned multiple specific wavelengths can be determined according to the wavelengths of the multiple optical signals in the real signal. Based on this, when the optical signals of the above-mentioned multiple specific wavelengths are coupled through an optical coupler, a second coherent optical signal closer to the real signal can be restored. In addition, through the above method, the coherent optical signal can be adjusted and restored directly in the optical domain, without multiple optoelectronic conversions and electro-optical conversions, improving the signal transmission efficiency.

[0052] In one implementation, the coherent optical signal input from the input port 610 can be divided into two paths by the beam splitter 660 according to actual requirements and then transmitted to the first modulation link 620 and the second modulation link 630 respectively for processing. In one example, the above-mentioned beam splitter 660 can be an equal-dividing beam splitter to equally divide the coherent optical signal input from the input port into two optical signals. In another example, the above-mentioned beam splitter 660 can be a non-equal-dividing beam splitter. For example, a 2-to-8 beam splitter can be selected to divide the coherent optical signal input from the input port 610 into two parts of 20% and 80%. Among them, the 20% part is input into the first modulation link 620, and the 80% part is input into the second modulation link 630; or, the 80% part is input into the first modulation link 620, and the 20% part is input into the second modulation link 630. Through the above method, different optical signals can be modulated through the above two modulation links according to actual requirements, so that the optical signal output from the output end of the optical coupler 640 can better meet the actual requirements.

[0053] In the above implementation, the selection of the beam splitter 660 is only an example provided by the embodiments of the present application. During specific implementation, the manufacturer can select according to actual usage requirements, and the embodiments of the present application do not make specific restrictions on this. In addition, the ratio of the optical signals input to the first modulation link 620 and the second modulation link 630 can also be selected according to actual requirements.

[0054] In the above implementation process, the optical coupler 640 described above can be a waveguide coupler. The waveguide coupler can be a directly coupled waveguide coupler or an indirectly coupled waveguide coupler, and the embodiments of the present application do not make specific limitations on this. Among them, there are no obstacles between the input waveguide and the output waveguide of the directly coupled waveguide coupler, and the optical signal can be directly transmitted. There are certain obstacles between the input waveguide and the output waveguide of the indirectly coupled waveguide coupler, such as gratings, diffraction gratings, and microlenses, and the optical signal is transmitted through gratings, diffraction gratings, microlenses, etc. Of course, in practical applications, the waveguide coupler can also adopt a combination of direct coupling and indirect coupling.

[0055] In some embodiments, at least one of the radius, thickness, refractive index of the micro-ring, and the spacing between the micro-ring and the waveguide in each of the first micro-ring modulators in the first modulation link is different. At least one of the radius, thickness, refractive index of the micro-ring, and the spacing between the micro-ring and the waveguide in each of the second micro-ring modulators in the second modulation link is different. In the micro-ring modulator, the radius, thickness, refractive index of the micro-ring, and the spacing between the micro-ring and the waveguide will all affect the non-linear processing ability of the micro-ring modulator. Therefore, the radius, thickness, refractive index of the micro-ring, and the spacing between the micro-ring and the waveguide can be designed specifically so that the micro-ring modulator can extract optical signals of specific wavelengths. Among them, the radius of the micro-ring includes the inner diameter and the outer diameter. By adjusting the inner diameter and the outer diameter of the micro-ring, the non-linear processing ability of the micro-ring modulator can be adjusted. The thickness of the micro-ring refers to the width perpendicular to the radius direction of the micro-ring (unit: μm). Different thicknesses of the micro-ring result in different non-linear processing abilities of the micro-ring modulator. Therefore, the thickness of the micro-ring can be adjusted to adjust the non-linear processing ability of the micro-ring modulator. The refractive index of the micro-ring is mainly affected by the material. Therefore, the material of the micro-ring can be adjusted according to actual needs to adjust the non-linear processing ability of the micro-ring modulator.

[0056] Among them, the principle of restoring the transmitted optical signal by the micro-ring controller is as follows: As Figure 7 shown, this figure shows the relationship between the wavelength of the optical signal input to a certain micro-ring modulator and the signal intensity of the optical signal output by the micro-ring modulator. Among them, the abscissa represents the wavelength of the optical signal input to the micro-ring modulator. Figure 7 The left vertical coordinate in the figure represents the signal intensity of the optical signal output by the micro-ring modulator. Figure 7 The right vertical coordinate in the figure represents the signal intensity after the optical signal is normalized. It can be seen from the figure that the micro-ring modulator has a strong absorption of signals of specific wavelengths, resulting in a very low transmission efficiency of the optical signal at this wavelength, so as to extract the optical signal of the set wavelength from the optical signal output from the output end and realize the modulation of the distorted signal.

[0057] In some embodiments, the first modulation link 620 and the second modulation link 630 can be the same modulation link. Among them, the number of the first microring modulators in the first modulation link 620 is the same as that of the second microring modulators in the second modulation link 630, and the multiple microring modulators used are the same (that is, the radius, thickness, refractive index of the microrings in the microring modulators at the same position, and the distance between the microring and the waveguide are the same), and the series connection order of the multiple microring modulators is also the same. The transmitted coherent optical signal can be modulated synchronously through two identical modulation links.

[0058] In one example, as Figure 8 shown, the first modulation link 620 can include four serially connected microring modulators (Q1 - Q4). For these four microring modulators, except for the inner diameter of the microrings, the difference between the inner diameter and the outer diameter of the microrings, the refractive index, thickness of the microrings, and the distance between the microrings and the waveguide are the same. For example, the inner diameter r1 of the microring of the first microring modulator Q1 is 20 micrometers (μm). The inner diameter r2 of the microring of the second microring modulator Q2 is 15 micrometers (μm). The inner diameter r3 of the microring of the third microring modulator Q3 is 22 micrometers (μm). The inner diameter r4 of the microring of the fourth microring modulator Q4 is 18 micrometers (μm). The optical signals of four wavelengths can be modulated through the four microring modulators in the first modulation link 620, so as to extract the optical signals of four wavelengths in the distorted signal input at the input port. Correspondingly, the second modulation link 630 can also include the above four microring modulators, and extract the optical signals of four wavelengths in the signal input at the input port through the above four microring modulators.

[0059] In some embodiments, the first modulation link 620 and the second modulation link 630 can be different modulation links. Different non - linear processes can be performed on the coherent optical signal input at the input port through two different modulation links, so as to modulate the coherent optical signal according to actual requirements.

[0060] In one example, as Figure 9 shown, the number of microring modulators in the first modulation link 620 and the second modulation link 630 can be the same. For example, the first modulation link includes four serially connected microring modulators (Q1 - Q4), and the second modulation link also includes four serially connected microring modulators (Q5 - Q8). However, at least one of the four microring modulators in the first modulation link 620 is different from the four microring modulators in the second modulation link 630. Among them, when the difference between the inner diameter and the outer diameter of the four microring modulators in the first modulation link 620 is the same as that of the four microring modulators in the second modulation link 630, at least one microring modulator has a different inner diameter.

[0061] For example, the inner radius r1 of the microring of the first microring modulator Q1 in the first modulation link 620 may be 20 micrometers (μm); the inner radius r2 of the microring of the second microring modulator Q2 may be 15 micrometers (μm); the inner radius r3 of the microring of the third microring modulator Q3 may be 22 micrometers (μm); the inner radius r4 of the microring of the fourth microring modulator Q4 may be 18 micrometers (μm). The inner radius r1 of the microring of the microring modulator Q5 in the second modulation link 630 may be 24 micrometers (μm); the inner radius r2 of the microring of the second microring modulator Q6 may be 15 micrometers (μm); the inner radius r3 of the microring of the third microring modulator Q7 may be 22 micrometers (μm); the inner radius r4 of the microring of the fourth microring modulator Q8 may be 18 micrometers (μm).

[0062] For another example, the inner radius r1 of the microring of the first microring modulator Q1 in the first modulation link 620 may be 21 micrometers (μm); the inner radius r2 of the microring of the second microring modulator Q2 may be 16 micrometers (μm). The inner radius r3 of the microring of the third microring modulator Q3 may be 22 micrometers (μm). The inner radius r4 of the microring of the fourth microring modulator Q4 may be 18 micrometers (μm). The inner radius r1 of the microring of the microring modulator Q5 in the second modulation link 630 may be 24 micrometers (μm); the inner radius r2 of the microring of the second microring modulator Q6 may be 15 micrometers (μm); the inner radius r3 of the microring of the third microring modulator Q7 may be 23 micrometers (μm); the inner radius r4 of the microring of the fourth microring modulator Q8 may be 19 micrometers (μm).

[0063] In another example, as Figure 10 shown, the number of microring modulators in the first modulation link 620 and the second modulation link 630 may also be different. For example, the first modulation link 620 includes four serially connected microring modulators (Q1 to Q4), and the second modulation link 630 also includes five serially connected microring modulators (Q5 to Q9). Among them, when the difference between the inner diameter and the outer diameter of the microring modulator is the same, some or all of the multiple first microring modulators in the first modulation link 620 and the multiple second microring modulators in the second modulation link 630 may be the same or may all be different.

[0064] For example, the inner radius r1 of the micro-ring of the first micro-ring modulator Q1 in the first modulation link 620 may be 20 micrometers (μm); the inner radius r2 of the micro-ring of the second micro-ring modulator Q2 may be 15 micrometers (μm); the inner radius r3 of the micro-ring of the third micro-ring modulator Q3 may be 22 micrometers (μm); the inner radius r4 of the micro-ring of the fourth micro-ring modulator Q4 may be 18 micrometers (μm). The inner radius r1 of the micro-ring of the micro-ring modulator Q5 in the second modulation link 630 may be 24 micrometers (μm); the inner radius r2 of the micro-ring of the second micro-ring modulator Q6 may be 15 micrometers (μm); the inner radius r3 of the micro-ring of the third micro-ring modulator Q7 may be 22 micrometers (μm); the inner radius r4 of the micro-ring of the fourth micro-ring modulator Q8 may be 18 micrometers (μm); the inner radius r4 of the fifth micro-ring modulator Q9 may be 23 micrometers (μm).

[0065] For another example, the inner radius r1 of the micro-ring of the first micro-ring modulator Q1 in the first modulation link 620 may be 21 micrometers (μm); the inner radius r2 of the micro-ring of the second micro-ring modulator Q2 may be 16 micrometers (μm); the inner radius r3 of the micro-ring of the third micro-ring modulator Q3 may be 22 micrometers (μm); the inner radius r4 of the micro-ring of the fourth micro-ring modulator Q4 may be 19 micrometers (μm). The inner radius r1 of the micro-ring of the micro-ring modulator Q5 in the second modulation link 630 may be 24 micrometers (μm); the inner radius r2 of the micro-ring of the second micro-ring modulator Q6 may be 15 micrometers (μm); the inner radius r3 of the micro-ring of the third micro-ring modulator Q7 may be 21 micrometers (μm); the inner radius r4 of the micro-ring of the fourth micro-ring modulator Q8 may be 18 micrometers (μm); the inner radius r4 of the fifth micro-ring modulator Q9 may be 23 micrometers (μm).

[0066] In the above embodiments, the number of micro-ring modulators in the first modulation link 620 and the second modulation link 630, as well as the radius of the micro-rings in the two micro-ring modulators, are only an example given in the embodiments of the present application. In specific implementation, the number of micro-ring modulators in the above two modulation links and the radius of the micro-rings in each micro-ring modulator can be adjusted according to actual needs. In addition, in addition to the different inner diameters of the micro-rings in the multiple micro-ring modulators in the above two modulation links, at least one of the thickness, outer diameter, difference between the inner diameter and the outer diameter, refractive index, and the distance between the micro-ring and the waveguide in each micro-ring modulator can also be different, and its specific implementation manner can be selected according to actual needs, and the embodiments of the present application do not make specific limitations here.

[0067] In some embodiments, considering that the coherent optical signal input at the input port is a distorted signal. In order to compensate and repair the distorted signal, the output end of one less first micro-ring modulator in the first modulation link 620 is also directly connected to the input end of the optical coupler through a first Mach-Zehnder interferometer. Exemplarily, such asFigure 11 As shown, it is assumed that the first modulation link 620 includes n first microring modulators (Q1 to Qn). The output end of each first microring modulator is connected to the input end of the optical coupler through a Mach-Zehnder interferometer ( Figure 11 MZI1 to MZIn in it). Among them, the output ends of the Mach-Zehnder interferometers in MZI1 to MZIn-1 are respectively connected to the input end of the next series-connected Mach-Zehnder interferometer and the input end of the optical coupler 640. By each Mach-Zehnder interferometer, the intensity of the optical signal output from each microring modulator in the first modulation link 620 to the optical coupler 640 can be adjusted, so as to compensate the optical signal output by the optical coupler 640, making the optical signal output from the output end of the optical coupler 640 closer to the true signal output by the transmitter (i.e., the undistorted coherent optical signal), so that the subsequent processing results are more accurate.

[0068] In some embodiments, the output end of at least one second microring modulator in the second modulation link 630 is also directly connected to the input end of the optical coupler through a second Mach-Zehnder interferometer. Exemplarily, as Figure 12 shown, it is assumed that the second modulation link 630 includes n second microring modulators (Qn+1 to Q2n). The output end of each second microring modulator is connected to the input end of the optical coupler through a Mach-Zehnder interferometer ( Figure 12 MZIn+1 to MZI2n in it). Among them, the output ends of the Mach-Zehnder interferometers in MZIn+1 to MZI2n-1 are respectively connected to the input end of the next series-connected Mach-Zehnder interferometer and the input end of the optical coupler 640. By each Mach-Zehnder interferometer, the intensity of the optical signal output from each microring modulator in the second modulation link to the optical coupler 640 can be adjusted, so as to compensate the optical signal output by the optical coupler 640, making the coherent optical signal output from the output end of the optical coupler 640 closer to the true signal output by the transmitter, so that the subsequent processing results are more accurate.

[0069] In the above embodiments, the first Mach-Zehnder interferometer and the second Mach-Zehnder interferometer can be various conventional Mach-Zehnder interferometers, and the embodiments of the present application do not make specific limitations thereto. In addition, the setting manners of the first Mach-Zehnder interferometer in the first modulation link 620 and the second Mach-Zehnder interferometer in the second modulation link 630 are only examples provided by the embodiments of the present application. When implementing specifically, the manufacturer can choose to set the first Mach-Zehnder interferometer between the output ends of some micro-ring modulators in the first modulation link 620 and the input end of the optical coupler 640, and / or set the second Mach-Zehnder interferometer between the output ends of some micro-ring modulators in the second modulation link 630 and the input end of the optical coupler 640, and the specific implementation manners can be selected according to actual requirements, and the embodiments of the present application do not make specific limitations thereto.

[0070] In some embodiments, in order to better compensate the optical signals transmitted on the first modulation link 620 and the second modulation link 630, a feedback loop can also be selected to be set on the first modulation link 620 and the second modulation link 630, and the optical signals at the input ends of the two modulation links are compensated through this feedback loop. Among them, the above feedback loop can also be implemented using a Mach-Zehnder interferometer. Exemplarily, as Figure 13 shown, the output end of the first modulation link 620 is further connected to the input end of the first modulation link 620 through the third Mach-Zehnder interferometer MZIx. The output end of the second modulation link 630 is further connected to the input end of the second modulation link 630 through the fourth Mach-Zehnder interferometer MZIy. The intensity of the optical signal fed back from the output end of the first modulation link 620 to the input end of the first modulation link 620 can be adjusted through the third Mach-Zehnder interferometer MZIx, so as to compensate the optical signal transmitted on the first modulation link 620. The intensity of the off-signal fed back from the output end of the second modulation link 630 to the input end of the second modulation link 630 can be adjusted through the fourth Mach-Zehnder interferometer MZIy, so as to compensate the optical signal transmitted on the second modulation link 630. Based on this, the optical signal output from the output end of the optical coupler 640 can be closer to the real signal output by the transmitter, so that the subsequent processing results are more accurate.

[0071] In the above embodiments, the third Mach-Zehnder interferometer MZIx and the fourth Mach-Zehnder interferometer MZIy can be various conventional Mach-Zehnder interferometers, and the embodiments of the present application do not make specific limitations thereto. In addition, the third Mach-Zehnder interferometer MZIx and the fourth Mach-Zehnder interferometer MZIy can be selectively set according to actual requirements during specific implementation. During specific implementation, only the third Mach-Zehnder interferometer MZIx can also be set, or only the fourth Mach-Zehnder interferometer MZIy can be set, and the embodiments of the present application do not make specific limitations thereto.

[0072] In some embodiments, such as Figure 14 shown, the above optical communication device 600 may further include a control circuit. Among them, the control circuit includes a first heating circuit 671 and a connection port 672 connected to the first heating circuit 671. Among them, the above first Mach-Zehnder interferometer, second Mach-Zehnder interferometer, third Mach-Zehnder interferometer, and fourth Mach-Zehnder interferometer are all heated through the first heating circuit 671. Since the adjustment of the intensity of the optical signal transmitted by the Mach-Zehnder interferometer can be achieved by changing the heating temperature, the Mach-Zehnder interferometer can be heated by the voltage input through the connection port 672 by configuring the corresponding first heating circuit 671 on the optical communication device 600, so as to adjust the intensity of the signal output by the Mach-Zehnder interferometer, without the need to set the corresponding first heating circuit 671 during specific use, and the optical signal transmitted can be compensated and restored more conveniently. Among them, the above first heating circuit 671 may include a plurality of heaters. At the same time, each of the above Mach-Zehnder interferometers is heated by one heater.

[0073] Optionally, the control circuit in the above optical communication device 600 may further include a controller 673 connected to the connection port 672. Through this controller, the temperature of the first heating circuit 671 can be controlled and adjusted according to the true signal and the optical signal output from the output port 650, so that the optical signal output from the output port 650 is consistent with the true signal, or the error between the optical signal output from the output port 650 and the true signal is within an allowable range. Among them, the controller 673 can be connected to a memory, and program instructions can be stored in the memory. Through these program instructions, the controller 673 can first determine the error between the true signal and the optical signal output from the output port 650. Then, according to this error, the heating temperature of each Mach-Zehnder interferometer is determined. Finally, according to this heating temperature, parameters such as the voltage and current of the first heating circuit are adjusted. Among them, the above-mentioned controller 673 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor can also be other devices with processing functions, such as circuits, devices, or software modules, which are not limited in this application. The memory can be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, USB flash drive, and optical data storage device, etc. The above-mentioned heating temperature can be determined according to the variation relationship between the temperature and the light intensity of each Mach-Zehnder interferometer actually used, and the embodiments of this application do not make specific limitations on this.

[0074] Exemplarily, after the above optical communication device 600 is installed in the receiving link of a certain receiving device (such as a receiver), it can be calibrated according to the true signal first to determine the heating temperature of each Mach-Zehnder interferometer. Then, the controller 673 saves the corresponding voltage, current and other parameters of each Mach-Zehnder interferometer, and adjusts the heating temperature of each Mach-Zehnder interferometer according to the above voltage, current and other parameters during the subsequent communication process. After the heating temperature of each Mach-Zehnder interferometer is adjusted, it remains unchanged, so as to compensate and recover the distorted signal during the subsequent communication process.

[0075] In some embodiments, such as Figure 15As shown, considering that after heating the microring, the microring modulator can also have a specific nonlinearity for an input signal of a certain wavelength (for example, having a high absorption rate for the signal of this wavelength, and thus a low transmission rate). Therefore, corresponding second heating circuits 674 can also be provided for each first microring modulator in the first modulation link 620 and each second microring modulator in the second modulation link 630 on the above optical communication device 600. The second heating circuit 674 can be connected to the controller 673 through the connection port 672. Through the second heating circuit 674, the first microring modulator or the second microring modulator can be heated according to actual needs, so as to adjust the resonant wavelength of the microring, obtain different nonlinear effects, and modulate signals of different wavelengths in the transmitted optical signal. Among them, the above second heating circuit 674 can also include multiple heaters. At the same time, each first microring modulator or second microring modulator is heated by one heater respectively.

[0076] In some embodiments, the controller 673 can be connected to the connection port 672 in a detachable manner. In this way, the user can select the required type of controller according to actual usage needs to meet the usage requirements of different application scenarios. In addition, the controller 673 can also be selected in an external connection manner, so as to reduce the size and manufacturing cost of the optical communication device 600.

[0077] In some embodiments, as Figure 16 shown, the above optical communication device 600 can also include a first optical amplifier P1 disposed between the input port and the input end of the beam splitter 660. Through the first optical amplifier P1, the coherent optical signal input from the input port 610 can be amplified according to actual needs.

[0078] Optionally, the above optical communication device 600 can also include a second optical amplifier P2 disposed between the first output end of the beam splitter 660 and the input end of the first modulation link 620. And / or, a third optical amplifier P3 disposed between the second output end of the beam splitter 660 and the input end of the second modulation link 630. Through the second optical amplifier P2 and the third optical amplifier P3, the optical signals input to the first modulation link 620 and the second modulation link 630 can be amplified according to actual needs.

[0079] In the above embodiments, the above embodiments are only an example given in this application. The first optical amplifier P1, the second optical amplifier P2, and the third optical amplifier P3 in the optical communication device 600 can be selectively provided according to actual needs, and the embodiments of this application do not make specific limitations on this.

[0080] In some embodiments, a fourth optical amplifier P4 is provided between any two adjacent microring modulators in the first modulation link 620. And / or, a fifth optical amplifier P5 is provided between any two adjacent microring modulators in the second modulation link 630. The fourth optical amplifier P4 and the fifth optical amplifier P5 can amplify the optical signals transmitted between any two adjacent microring modulators in the first modulation link 620 and the second modulation link 630 according to actual requirements. Among them, an optical amplifier can also be provided between two adjacent microring modulators in the first modulation link 620 and the second modulation link 630.

[0081] In the above embodiments, the fourth optical amplifier P4 and the fifth optical amplifier P5 can be selectively provided according to actual requirements, and the embodiments of the present application do not make specific restrictions on this. In addition, whether to provide an optical amplifier can be selected according to actual requirements between each group of two adjacent microring modulators in the first modulation link 620 and the second modulation link 630.

[0082] Further, in order to verify the effect of the optical communication device 600 provided by the embodiments of the present application, the embodiments of the present application also experimentally verified the performance of the above optical communication device 600. Among them, the transmission distance of the set data is 400 kilometers (km), and the transmission rate is 10 gigabaud (GBaud), that is, 10 gig (G) symbols are transmitted per second. Among them, each signal point transmitted is called a symbol, the modulation format is 16-ary quadrature amplitude modulation (16-QAM), the training signal uses 4000 symbols, and the test signal after training uses 8000 symbols. Among them, the signal distribution diagram of 16-ary quadrature amplitude modulation is as Figure 17 shown. There are 16 different signals in 16-QAM. The abscissa of each signal point is the real part, and the ordinate is the imaginary part. Each signal point is represented by four bits. Therefore, compared with QPSK (2*2 = 4 kinds of signals), 16-QAM has more signal types and can achieve a higher transmission rate. There are 16 symbols in 16-QAM. Assuming that the symbol transmission rate is 10 GBaud, since each symbol is represented by four-bit information, the corresponding transmission bit rate is 10*4 = 40 Gbit / s. It can be seen that at the same symbol rate, the modulation format can determine different bit rates. The more symbol types, the more bits used to represent the information, the higher the bit rate, and a higher transmission rate can also be achieved.

[0083] Before the optical communication device 600 is officially put into use, the above optical communication device 600 can be trained with a training signal. Among them, after the training signal is input into the above optical communication device 600, the controller can determine the error between the optical signal output by the optical communication device and the training signal, and then determine the heating temperature of each Mach-Zehnder interferometer and / or the heating temperature of each micro-ring in the micro-ring modulator according to the error. Finally, according to the heating temperature of each Mach-Zehnder interferometer and the heating temperature of the micro-rings in each micro-ring modulator, parameters such as the voltage and current of the corresponding heating circuits are determined. When conducting inspections, each Mach-Zehnder interferometer and the micro-rings in each micro-ring modulator can be heated according to the parameters such as the voltage and current of each heating circuit and the heating temperature can be kept unchanged, so as to compensate and recover the inspection signal. Among them, the effect of signal compensation and recovery is as Figure 18 shown. As can be seen from Figure 18 (a) in, the initial coherent optical signal is distributed on 16 standard signal points. After fiber transmission, the distorted coherent optical signal received by the receiver is as Figure 18 (b) in, and at this time, the original positions of each signal point can no longer be distinguished. After being modulated and compensated and recovered by the above optical communication device 600, the compensated and recovered coherent optical signal is as Figure 18 (c) in. As can be seen from Figure 18 , the above optical communication device 600 provided by the embodiments of the present application can effectively compensate and recover the distorted coherent optical signal after transmission.

[0084] In some embodiments, as Figure 19 shown, the embodiments of the present application further provide an electronic device 2000, which includes the optical communication device 600 in any of the above embodiments. A photodetector 2010 connected to the optical communication device 600. A processor 2020 connected to the photodetector 2010. Among them, the input end of the above optical communication device 600 can be connected to the output end of the transmitter through an optical fiber. After receiving the distorted coherent optical signal, the optical communication device 600 can be modulated and compensated and recovered through the first modulation link 620 and the second modulation link 630, so as to obtain an optical signal closer to the real signal. After the optical signal is subjected to photoelectric conversion by the photodetector 2010, a corresponding electrical signal can be obtained. The processor 2020 can obtain more accurate communication data after performing corresponding processing based on the electrical signal. Among them, the above electronic device 2000 can be a receiver, a terminal with receiver function, a computer, a server, etc.

[0085] In some embodiments, as Figure 20As shown in the figure, the embodiment of the present application further provides an optical communication chip 2100, which includes a substrate 2110 and the above-mentioned optical communication device 600 disposed on the substrate 2110. Among them, the optical communication device 600 can be connected to an optical fiber through an input terminal and connected to subsequent processing devices such as a photodetector through an output terminal. The above-mentioned substrate 2110 can be various conventional substrates used in the field of chip manufacturing, such as a printed circuit board (PCB), a silicon substrate, etc.

[0086] In one implementation, the above-mentioned communication chip 2100 can also selectively dispose a controller 2120 on the substrate. Through this controller 2120, the temperature of each micro-ring modulator and Mach-Zehnder interferometer in the first modulation link 620 and the second modulation link 630 can be controlled. In this way, the wireless external controller is more convenient to use.

[0087] The above-mentioned controller 2120 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor can also be other devices with processing functions, such as circuits, devices, or software modules, which are not limited in this application.

[0088] Those of ordinary skill in the art can realize that the functions of the modulation links of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0089] In several embodiments provided by the present application, it should be understood that the disclosed links and electronic devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the links is only a logical function division, and there can be other division methods in actual implementation. For example, multiple links or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0090] Further, in the above implementation process, the optical communication device in the above embodiments may also include other types of devices, and the embodiments of the present application do not make specific limitations thereto. In addition, in the optical communication devices, photodetectors, processors, etc. in various embodiments of the present application, they may be integrated in one device, or each device may exist physically separately, or two or more devices may be integrated in one device.

[0091] The above are only specific implementation manners of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical communication device, characterized in that: include: An input port, a beam splitter, a first modulation link, a second modulation link, an optical coupler, and an output port; wherein, The input end of the beam splitter is connected to the input port; the first output end of the beam splitter is connected to the input end of the first modulation link; the second output end of the beam splitter is connected to the input end of the second modulation link: The output end of the first modulation link and the output end of the second modulation link are both connected to the input end of the optical coupler; the output end of the optical coupler is connected to the output port; The first modulation chain includes a plurality of different first micro-ring modulators connected in series; The second modulation chain includes a plurality of different second micro-ring modulators connected in series.

2. The optical communication device according to claim 1, characterized in that The input port is used to input a first coherent optical signal; The beam splitter is used to split the first coherent optical signal into a first optical signal and a second optical signal; The first modulation link is used to perform amplitude modulation on the first optical signal and output a third optical signal; The second modulation link is used to perform phase modulation on the second optical signal and output a fourth optical signal; The optical coupler is used for inputting the third optical signal and the fourth optical signal, and outputting a second coherent optical signal to the output port.

3. The optical communication device according to claim 1 or 2, characterized in that: The output end of at least one of the first micro-ring modulators in the first modulation link is also directly connected to the input end of the optical coupler through a first Mach-Zehnder interferometer; and / or, the output end of at least one of the second micro-ring modulators in the second modulation link is also directly connected to the input end of the optical coupler through a second Mach-Zehnder interferometer.

4. The optical communication device according to any one of claims 1 to 3, characterized in that: The output end of the first modulation link is also connected to the input end of the first modulation link through a third Mach-Zehnder interferometer; and / or the output end of the second modulation link is also connected to the input end of the second modulation link through a fourth Mach-Zehnder interferometer.

5. The optical communication device according to any one of claims 1 to 4, characterized in that: The first modulation link and the second modulation link are the same or different modulation links.

6. The optical communication device according to any one of claims 1 to 5, characterized in that: At least one of the radius, thickness, refractive index and spacing between the microring and the waveguide of the microring in each of the first microring modulators in the first modulation link is different; at least one of the radius, thickness, refractive index and spacing between the microring and the waveguide of the microring in each of the second microring modulators in the second modulation link is different.

7. The optical communication device according to any one of claims 1 to 6, characterized in that: Also includes: A first optical amplifier is disposed between the input port and the input end of the beam splitter.

8. The optical communication device according to any one of claims 1 to 7, characterized in that: Also includes: a second optical amplifier disposed between the first output end of the beam splitter and the input end of the first modulation link; and / or, a third optical amplifier arranged between the second output end of the beam splitter and the input end of the second modulation link.

9. The optical communication device according to any one of claims 1 to 8, characterized in that: A fourth optical amplifier is provided between any two adjacent first micro-ring modulators in the first modulation link; and / or a fifth optical amplifier is provided between any two adjacent second micro-ring modulators in the second modulation link.

10. The optical communication device according to any one of claims 3 to 9, characterized in that: It also includes a control circuit; the control circuit includes a first heating circuit; the first heating circuit is used to heat at least one of the first Mach-Zehnder interferometer, the second Mach-Zehnder interferometer, the third Mach-Zehnder interferometer and the fourth Mach-Zehnder interferometer.

11. The optical communication device according to claim 10, characterized in that: The control circuit further includes a second heating circuit; wherein the second heating circuit is used to heat the first micro-ring modulator and / or the second micro-ring modulator.

12. An optical communication chip, characterized in that: It comprises a backing plate, and an optical communication device as claimed in any one of claims 1 to 11 arranged on the backing plate.

13. An electronic device, characterized in that: It comprises the optical communication device as described in any one of claims 1 to 11; a photodetector connected to the optical communication device; and a processor connected to the photodetector.

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