Wavelength alignment method for micro-ring modulator, optical communication device, and photonic integrated circuit

Abstract

The present application relates to the technical field of optical communications, and discloses a wavelength alignment method for a micro-ring modulator, an optical communication device, and a photonic integrated circuit. The wavelength alignment method for a micro-ring modulator in embodiments of the present application comprises: a first optical communication device sending a first signal to a second optical communication device, wherein the first signal is obtained by using a micro-ring modulator to modulate first information and radio frequency information to be transmitted, a frequency band corresponding to the first information is different from a frequency band corresponding to said radio frequency information, and the first information comprises first heating information used for heating the micro-ring modulator; receiving a second signal from the second optical communication device, wherein the second signal comprises the first heating information and average optical power information of the first signal; and performing wavelength alignment on the micro-ring modulator on the basis of the second signal.

Description

Wavelength alignment method of micro-ring modulator, optical communication device and optical chip

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202410843398.9, filed on June 27, 2024, and entitled "Wavelength alignment method of micro-ring modulator, optical communication device and optical chip", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of optical communication technology, and particularly relates to a wavelength alignment method of a micro-ring modulator, an optical communication device and an optical chip. BACKGROUND

[0004] Wavelength alignment of a micro-ring modulator is a key technology of the micro-ring modulator.

[0005] At present, in the related art, the relationship between the two is dynamically locked by heating to achieve wavelength alignment of the micro-ring modulator, mainly by taking advantage of the characteristic that the refractive index of silicon material is easily affected by temperature. For example, an optical power monitoring function can be added to the output light path on the sending side, and then the silicon material in the micro-ring modulator is heated according to the optical monitoring result to adjust the refractive index of silicon-based to achieve wavelength alignment.

[0006] However, the aforementioned wavelength alignment scheme based on the sending side still has the problem of waste of photonic integrated circuit (PIC) area, which affects the implementation of high-density micro-ring modulators, especially for high-density applications. The current wavelength alignment scheme of the micro-ring modulator restricts the application range of high-density applications. SUMMARY

[0007] The purpose of the embodiments of the present application is to provide a wavelength alignment method of a micro-ring modulator, an optical communication device and an optical chip.

[0008] In a first aspect, a wavelength alignment method of a micro-ring modulator is provided, applied to a first optical communication device, and the method comprises: sending a first signal to a second optical communication device, wherein the first signal is obtained by modulating first information and to-be-transmitted radio frequency information by using a micro-ring modulator, the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the first information includes first heating information used for heating of the micro-ring modulator; receiving a second signal from the second optical communication device, wherein the second signal includes the first heating information and average optical power information of the first signal; and performing wavelength alignment of the micro-ring modulator according to the second signal.

[0009] In a second aspect, a wavelength alignment method of a micro-ring modulator is provided, and is applied to a second optical communication device. The method comprises: receiving a first signal from a first optical communication device, wherein a frequency band of first information included in the first signal is different from a frequency band of to-be-transmitted radio frequency information, and the first information comprises first heating information when the first optical communication device heats the micro-ring modulator; determining the first heating information and average optical power information of the first signal according to the first signal; and sending a second signal to the first optical communication device, wherein the second signal comprises the first heating information and the average optical power information of the first signal.

[0010] In a third aspect, a first optical communication device is provided. The first optical communication device comprises: an optical chip, wherein a micro-ring modulator is integrated on the optical chip; an optical sending unit, configured to send a first signal to a second optical communication device, wherein the first signal is obtained by modulating first information and to-be-transmitted radio frequency information by using the micro-ring modulator, the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the first information comprises first heating information for heating the micro-ring modulator; an optical receiving unit, configured to receive a second signal from the second optical communication device, wherein the second signal comprises the first heating information and average optical power information of the first signal; and a controller, configured to perform wavelength alignment of the micro-ring modulator according to the second signal.

[0011] In a fourth aspect, a second optical communication device is provided. The second optical communication device comprises: an optical receiving unit, configured to receive a first signal from a first optical communication device, wherein a frequency band of first information included in the first signal is different from a frequency band of to-be-transmitted radio frequency information, and the first information comprises first heating information when the first optical communication device heats the micro-ring modulator; a controller, configured to determine the first heating information and average optical power information of the first signal according to the first signal; and an optical sending unit, configured to send a second signal to the first optical communication device, wherein the second signal comprises the first heating information and the average optical power information of the first signal.

[0012] In a fifth aspect, an optical chip is provided. The optical chip integrates a micro-ring modulator and a heating element for heating the micro-ring modulator. The micro-ring modulator is configured to modulate first information and to-be-transmitted radio frequency information to obtain a first signal. The first information comprises first heating information for heating the micro-ring modulator, and a frequency band corresponding to the first information is different from a frequency band corresponding to to-be-transmitted radio frequency information in the first signal.

[0013] In a fifth aspect, an optical communication device is provided, which includes a memory, a processor, and computer executable instructions stored in the memory and executable on the processor, and when the computer executable instructions are executed by the processor, the steps of the method in the first aspect or the second aspect are implemented.

[0014] In a sixth aspect, a computer readable storage medium is provided, which is configured to store computer executable instructions, and when the computer executable instructions are executed by a processor, the steps of the method in the first aspect or the second aspect are implemented. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0016] FIG. 1 is a structural schematic diagram of an optical transmission system in the related art.

[0017] FIG. 2 is a schematic diagram of an optical transmission system according to an exemplary embodiment of the present application.

[0018] FIG. 3 is a schematic diagram of an optical transmission system according to another exemplary embodiment of the present application.

[0019] FIG. 4 is a flowchart of a wavelength alignment method of a micro-ring modulator according to an exemplary embodiment of the present application.

[0020] FIG. 5 is a schematic diagram of an optical transmission system according to another exemplary embodiment of the present application.

[0021] FIG. 6 is a schematic diagram of an optical transmission system according to another exemplary embodiment of the present application.

[0022] FIG. 7 is a schematic diagram of a data structure of a fourth signal according to an exemplary embodiment of the present application.

[0023] FIG. 8a is a schematic diagram of an optical transmission system according to another exemplary embodiment of the present application.

[0024] FIG. 8b is a schematic diagram of an optical transmission system according to another exemplary embodiment of the present application.

[0025] FIG. 9 is a flowchart of a wavelength alignment method of a micro-ring modulator according to another exemplary embodiment of the present application.

[0026] Fig. 10 is a structural schematic diagram of an optical communication device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical personnel in the technical field better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present application.

[0028] For the micro-ring modulator, it can have but is not limited to the following a)-d) shown in the characteristics.

[0029] a) can support a relatively high modulation rate, from the current industry level, the physical bandwidth can be greater than 60GHZ, can support 224G pulse amplitude modulation (PAM) 4 signal, and the silicon-based MZ modulator is at the same level; and its potential in high-speed modulation is even greater than that of the MZI modulator.

[0030] b) the special properties of the micro-ring modulator itself, that is, the periodic characteristics of the micro-ring resonance peak can be used to realize the multiplexer (mux) / demultiplexer (demux) function, without additional devices, and also makes the size advantage more obvious.

[0031] c) the size of the micro-ring modulator is relatively small, such as compared with the MZ modulator with a size of millimeter level, the size of the micro-ring modulator is generally in the order of microns, which can greatly improve the density of photoelectric conversion, and is particularly suitable for integrated packaging with large-capacity application specific integrated circuit (ASIC).

[0032] d) the micro-ring modulator has very small power consumption, which can be equivalent to a capacitor, and the corresponding driver can use a voltage driving mode. Compared with the MZI modulator, a current driving mode is needed to make it work normally, and the required power consumption is much higher than that of the micro-ring modulator. Especially in the use of non-return to zero (NRZ) encoding mode, lower power consumption can be achieved. This is also the most common use in optical input / output (optical I / O) application scenarios.

[0033] Based on the foregoing excellent characteristics of the microring modulator, the microring modulator becomes a preferred modulator in a high-density optical interconnection scenario. The working principle of the microring modulator is to use the edge of the Lorentz curve of the microring modulator in the resonant state to complete the modulation of the high-speed signal. In the related art, considering the process error of the microring modulator and the range of the working wavelength, the circumference of the microring and the working wavelength must be accurately matched through a certain way. At the same time, because the refractive index of the silicon material is sensitive to temperature, it is also necessary to dynamically lock the relationship between the two, which is usually referred to as wavelength alignment.

[0034] At present, the related art mainly uses the characteristic that the refractive index of the silicon material is easily affected by temperature to dynamically lock the relationship between the two by heating to achieve the wavelength alignment of the microring modulator. For example, the wavelength alignment can be achieved by adding an optical power monitoring function (such as a monitoring module) in the output optical path of the sending side, and then heating the silicon material in the microring modulator according to the optical monitoring result to adjust the refractive index of the silicon-based material.

[0035] For example, as shown in FIG. 1, the sending side divides about 5% of the modulated optical path through the coupler, and sends the optical path to the wavelength alignment controller through the trans impedance amplifier (TIA) and the analog-to-digital converter (ADC), so that the wavelength alignment controller heats the resistance to realize the function of wavelength alignment. In the monitoring module of the PIC in the sending side, a photodetector (PD), a coupling optical splitter, and a monitoring pad (PAD) are included. In general, the size of the PAD corresponding to the radio frequency (RF) is 80um, and the size of the other PAD is 70um. Based on this, it can be obtained that the monitoring module occupies about 30-50% of the area of the PIC in the sending side.

[0036] That is, the foregoing wavelength alignment scheme based on the sending side provided in the related art still has the problem of waste of PIC area, which affects the implementation of the high-density microring modulator, especially for high-density applications. The wavelength alignment scheme of the current microring modulator restricts the application range of the high-density application.

[0037] To this end, the present application provides a wavelength alignment scheme of a microring modulator, as shown in FIG. 2, in which the optical power monitoring function provided in the PIC in the sending side in the related art is cancelled, thereby saving 30%-50% of the area at the level of the PIC in the sending side, which can greatly improve the power density of the microring modulator and reduce the cost.

[0038] For example, as shown in FIG. 3, a schematic diagram of an optical transmission system provided by an exemplary embodiment of the present application is provided, wherein the optical transmission system includes a first optical communication device (i.e., the transmitting side shown in FIG. 3) and a second optical communication device (i.e., the receiving side shown in FIG. 3).

[0039] For the first optical communication device, it can include but is not limited to an optical transmitting unit, a controller, and an optical receiving unit.

[0040] The optical transmitting unit is configured to perform optical modulation on the information to be transmitted and then transmit the information. In this embodiment, the optical transmitting unit can include a PIC, an optical connector, a digital-to-analog converter (DAC), etc.

[0041] The PIC is integrated with a micro-ring modulator and a heating element (e.g., a carbon dioxide resistor or other heating resistor). The heating element is configured to heat the micro-ring modulator. Compared with the PIC in the related art, the first optical communication device as the transmitting side cancels the PD, waveguide coupler, and monitoring PAD in the optical monitoring function for wavelength alignment, which is arranged in the PIC, thereby effectively saving the PIC area of the transmitting side (e.g., by 30% to 50%), realizing high-density micro-ring modulators, increasing the application range of high-density applications, and reducing the implementation cost of wavelength alignment of the micro-ring modulator.

[0042] The controller (also referred to as a wavelength alignment controller, etc.) is configured to perform information control and processing in the wavelength alignment process of the micro-ring modulator, such as controlling the heating element to heat the micro-ring modulator, modulating the heating information and the to-be-transmitted radio frequency information at different frequency bands by using the micro-ring modulator, performing wavelength alignment according to the heating information and average optical power information fed back by the receiving side, initializing the wavelength alignment state, verifying the consistency of the received information, monitoring the channel quality, etc.

[0043] In an embodiment, the controller in the present application can reuse the wavelength alignment controller in the related art, or add a new controller or information processing module on the basis of the existing wavelength alignment controller to perform the functions of the aforementioned controller, which is not limited herein.

[0044] The light receiving unit is configured to process the signal from the second optical communication device. For example, in the present application, the light receiving unit can include a photoelectric conversion unit configured to convert the received optical signal into an electrical signal, a transimpedance amplifier configured to amplify the electrical signal, a mirror element configured to mirror the amplified electrical signal, a band-pass filter configured to filter the mirrored electrical signal, an analog-to-digital converter (ADC) configured to perform analog-to-digital conversion on the filtered signal, and the like.

[0045] The second optical communication device can include a light receiving unit, a controller, and a light transmitting unit.

[0046] The light receiving unit is configured to process the received optical signal and input the controller. For example, the light receiving unit can include, but is not limited to, a photoelectric conversion unit configured to convert the received optical signal into an electrical signal, a transimpedance amplifier configured to amplify the electrical signal, a mirror element configured to mirror the amplified electrical signal, a band-pass filter (e.g., a first band-pass filter, a second band-pass filter, etc.) configured to filter the mirrored electrical signal, and an analog-to-digital converter configured to perform analog-to-digital conversion on the filtered signal.

[0047] The controller is configured to process the information received by the light receiving unit, such as checking the consistency of the received information and determining the average optical power information.

[0048] The light transmitting unit is configured to modulate the information to be transmitted in the controller and transmit the modulated information. The light transmitting unit can include, but is not limited to, a modulator (e.g., a micro-ring modulator, an MZ modulator), an optical connector, a DAC, and the like.

[0049] Based on the foregoing optical transmission system, the technical solutions provided by the embodiments of the present application will be described in detail below through some embodiments and their application scenarios.

[0050] FIG. 4 shows a flow diagram of a wavelength alignment method 400 of a micro-ring modulator according to an embodiment of the present application. The method 400 can be performed by a first optical communication device. In other words, the method can be performed by software and / or hardware installed in the first optical communication device. As shown in FIG. 4, the method 400 can include the following steps.

[0051] In step S410, a first signal is transmitted to a second optical communication device.

[0052] In step S420, a second signal from the second optical communication device is received.

[0053] The first signal is obtained by modulating first information and to-be-transmitted radio frequency information (or to-be-transmitted radio frequency (RF) signal) by the first optical communication device using a micro-ring modulator, the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the first information includes first heating information (also referred to as wavelength control information, heating control information, etc.) for heating of the micro-ring modulator. The first heating information can be determined based on a wavelength alignment initialization process or according to historical experience, which is not limited herein.

[0054] The to-be-transmitted radio frequency information can be, but is not limited to, a Pseudo-Random Binary Sequence (PRBS) and the like. In the embodiment, the to-be-transmitted radio frequency information is a data code stream with high frequency characteristics, such as a 112 GHz PAM code stream and the like.

[0055] The micro-ring modulator can be, but is not limited to, a silicon-based micro-ring modulator and the like, and can also be other micro-ring modulators with strong correlation between modulation performance and temperature change, which is not limited herein.

[0056] Based on this, for the transmission of the first heating information, the first heating information (i.e., wavelength control information) for controlling heating of the micro-ring modulator can be superimposed on the micro-ring modulator at the normal working time of the micro-ring modulator at the transmission side (i.e., the first optical communication device), and modulated together with the to-be-transmitted radio frequency information, so as to achieve the purpose of transmitting the first heating information and the to-be-transmitted radio frequency information together to the second optical communication device side by using the micro-ring modulator. For example, referring to FIG. 3, the first optical communication device can input the first heating information into a DAC through a controller, then process it into an analog signal containing the first heating information by the DAC, and finally superimpose the analog signal on the micro-ring modulator for modulation and transmission.

[0057] It should be noted that when the first heating information is superimposed on the micro-ring modulator, the frequency band of the first heating information (i.e., the analog signal) needs to be controlled or ensured to be different from the frequency band of the to-be-transmitted radio frequency information, such as controlling the frequency band of the first heating information (i.e., the analog signal) to be lower than the frequency band of the to-be-transmitted radio frequency information (i.e., the first heating information is superimposed on the out-of-band channel of the micro-ring modulator for transmission). Thus, on the one hand, the second communication optical device can distinguish the received to-be-transmitted radio frequency information and the first information according to the different frequency bands, so as to realize calculation of average optical power information, and on the other hand, the normal transmission of the to-be-transmitted radio frequency information can be not affected while the first heating information is transmitted.

[0058] For example, after receiving the first signal, the second optical communication device can perform filtering processing on the received first signal according to different information frequency bands, so as to obtain the first information and the to-be-transmitted radio frequency information, and then calculate the average optical power of the first signal according to the to-be-transmitted radio frequency information, and feed back the average optical power of the first signal and the first heating information to the first optical communication device through the second signal, that is, the second signal includes the first heating information and the average optical power information of the first signal.

[0059] As an optional implementation, the second optical communication device can determine the first heating information and the average optical power information according to different information frequency bands in the first signal in various ways. For example, referring to FIG. 3 or FIG. 5 again, when receiving the first signal, the second optical communication device can first convert the first signal from the first optical communication device into an electrical signal through a PD; then amplify the electrical signal through a TIA; then mirror process the amplified electrical signal into a first sub-signal and a second sub-signal through a mirror element; then input the first sub-signal into a controller after filtering through a first band-pass filter, and input the second sub-signal into the controller after filtering through a second band-pass filter; and finally determine the average optical power information of the first signal according to the filtered first sub-signal through the controller, and determine the first information according to the filtered second sub-signal.

[0060] In the filtering process using the first band-pass filter and the second band-pass filter, since the bandwidth characteristics of the first band-pass filter correspond to or are the same as the frequency band of the to-be-transmitted radio frequency information, the first information in the first sub-signal can be filtered out when the first sub-signal is filtered through the first band-pass filter, so as to obtain the to-be-transmitted radio frequency information for calculating the average optical power information of the first signal.

[0061] Similarly, the bandwidth characteristics of the second band-pass filter correspond to or are the same as the frequency band of the first information, so that the to-be-transmitted radio frequency information in the second sub-signal can be filtered out when the second sub-signal is filtered through the second band-pass filter, so as to obtain the first information such as the first heating information, for monitoring the link state and the like.

[0062] In step S430, the wavelength of the micro-ring modulator is aligned according to the second signal.

[0063] The wavelength alignment process of the first optical communication device according to the second signal can also be understood as monitoring the wavelength alignment state of the micro-ring modulator. For example, when it is determined according to the second signal that the micro-ring modulator does not work at the optimal working point, the wavelength alignment of the micro-ring modulator can be performed through alarm, re-execution of the wavelength initialization process, etc., to ensure the modulation performance of the micro-ring modulator.

[0064] For another example, if it is determined according to the second signal that the micro-ring modulator works at the optimal working point, then the second signal is ignored, and the wavelength alignment state of the micro-ring modulator is continuously monitored to ensure the modulation performance of the micro-ring modulator.

[0065] Based on the foregoing description, compared with the scheme of adding an optical monitoring function at the sending side to realize the wavelength alignment of the micro-ring modulator in the related art, in the technical scheme provided in the present application, the wavelength control information (i.e., the first heating information) of the sending side (i.e., the first optical communication device) is transmitted to the receiving side (i.e., the second optical communication device) by means of superimposing information of a specific frequency band on the micro-ring modulator, then the average optical power information is determined according to the received first signal at the receiving side, and the average optical power information and the wavelength control information corresponding thereto are fed back to the sending side, and finally the wavelength alignment is realized according to the feedback average optical power information and the corresponding wavelength control information at the sending side. In this way, on the one hand, the closed-loop control of the micro-ring modulator can be realized while the resonance state of the micro-ring modulator in the first optical communication device is monitored to ensure the modulation performance of the micro-ring modulator, such as the optimal working state of the micro-ring modulator; on the other hand, the photodetector (PD), waveguide coupler, monitoring PAD, etc. in the optical monitoring function for realizing the wavelength alignment in the PIC at the sending side can be cancelled, the PIC area at the sending side can be saved (such as 30% to 50%), the high-density micro-ring modulator can be realized, the application range of high-density applications is increased, and the implementation cost of the wavelength alignment of the micro-ring modulator is reduced.

[0066] Meanwhile, compared with the related art, the present application can also save the splitting power (such as 5%) of the optical splitter in the optical communication device at the sending side, cancel the related functional modules of the TIA in the electronic integrated circuit (EIC) at the sending side, and further reduce the power consumption at the sending side.

[0067] In some embodiments, for the second optical communication device, after receiving the first signal sent by the first optical communication device, it can first determine whether the first heating information in the received first signal is consistent with the first heating information to be sent by the first optical communication device, and in the case of consistency, it is determined that the link between the first optical communication device and the second optical communication device is normal, and the step of sending a second signal to the first optical communication device is performed.

[0068] Alternatively, in the case of inconsistency, the first optical communication device determines that the link between the first optical communication device and the second optical communication device is abnormal, and the first heating information and the average optical power information of the first signal calculated can be ignored. As can be seen, through the sending of the first heating information, in addition to being used by the second optical communication device to determine the average optical power corresponding thereto, it can also be used to monitor the state of the link between the first optical communication device and the second optical communication device, thereby ensuring the accuracy of the average optical power information calculated by the second optical communication device and avoiding invalid feedback in the case of information inconsistency.

[0069] In this embodiment, the second optical communication device can determine the consistency of the first heating information in various ways. For example, as one possible implementation, the first optical communication device can include first check information in the first information when sending the first information. The first check information is used by the second optical communication device to check the consistency between the received first heating information and the first heating information to be sent by the first optical communication device, or in other words, the first check information is used by the second optical communication device to determine whether the received byte is correct.

[0070] In an embodiment, the first check information can be, but is not limited to, a cyclic redundancy check (CRC) code, etc.

[0071] In some embodiments, similar to the checking of the first information by the second optical communication device as described above, the first optical communication device can also determine whether the received second signal is consistent with the second signal to be transmitted by the second optical communication device before performing the wavelength alignment of the micro-ring modulator according to the second signal in S430, and in the case of consistency (i.e. determining that the link between the second optical communication device and the first optical communication device is normal), performing the step of wavelength alignment of the micro-ring modulator according to the second signal; otherwise, determining that the link between the second optical communication device and the first optical communication device is abnormal, and ignoring the second signal. In this way, through the consistency check of the second signal, not only can the link status of the second optical communication device to the first optical communication device be monitored, such as whether it is normal, but also the received information can be ensured to be error-free, thereby ensuring the accuracy of the wavelength alignment state determination result of the micro-ring modulator, such as determining whether the micro-ring modulator is at the optimal operating point or not.

[0072] In the present embodiment, the first optical communication device can determine the consistency of the second signal in various ways. For example, as one possible implementation, the second optical communication device can include second check information in the second signal when transmitting the second signal, so as to check the consistency between the received second signal and the second signal to be transmitted by the second optical communication device, or in other words, the second check information is used by the first optical communication device to determine whether the received byte is correct. In an embodiment, the second check information can be, but is not limited to, CRC code, etc.

[0073] For example, for the consistency check of the second signal, the first optical communication device can determine whether the first heating information in the received second signal is consistent with the first heating information to be transmitted by the second optical communication device, and whether the average optical power information in the received second signal is consistent with the average optical power information to be transmitted by the second optical communication device, according to the second check information.

[0074] For example, in the case of determining that the first heating information in the received second signal is inconsistent with the first heating information to be transmitted by the second optical communication device, and / or the average optical power information in the received second signal is inconsistent with the average optical power information to be transmitted by the second optical communication device, it is determined that the link between the second optical communication device and the first optical communication device is abnormal.

[0075] In some embodiments, referring to FIG. 6, when the first optical communication device transmits the first signal to the second optical communication device, the first optical communication device can also carry specific code stream information in the first information in the first signal, so as to monitor the channel quality of the micro-ring modulator, thereby solving the problem of misjudgment of wavelength alignment caused by optical power waveguide and the like.

[0076] Correspondingly, after obtaining the specific code stream information from the received first signal, the second optical communication device can carry the specific code stream information in the second signal and feed back to the first optical communication device, so that the first optical communication device monitors the channel quality of the micro-ring modulator according to the specific code stream information, such as whether the channel quality of the micro-ring modulator meets the nonlinear characteristics or whether it is within the nonlinear tolerance range, and the like.

[0077] In an embodiment, for the second optical communication device, the specific code stream information can be obtained from the first information filtered based on the second band-pass filter as shown in FIG. 5, or a third band-pass filter can be added to the second optical communication device as shown in FIG. 6. The bandwidth characteristics of the third band-pass filter correspond to or are the same as the frequency band of the first information, so as to filter the third sub-signal output by the mirror element to obtain the first information, and the controller parses the specific code stream information from the first information, which is not limited herein.

[0078] It is worth noting that in the present embodiment, considering that the specific code stream information is used to monitor the channel quality of the micro-ring modulator in the first optical communication device, when the second optical communication device receives the specific code stream information, the second optical communication device does not need to perform consistency verification on the specific code stream information, but only needs to feed back the obtained specific code stream information to the first optical communication device, while the first optical communication device needs to verify the consistency of the specific code stream information according to the second verification information in the second signal, so as to ensure that the received specific code stream information is correct, and further ensure that the monitoring result of the channel quality of the micro-ring modulator determined based on the specific code stream information is correct.

[0079] In an embodiment, the specific code stream information can be generated by an existing signal generator of the first optical communication device, or can be generated by a newly added signal generator dedicated to the specific code stream information, which is not limited herein.

[0080] In some embodiments, the first optical communication device can further perform a wavelength alignment initialization process of the micro-ring modulator when the first condition is met during optical signal transmission using the micro-ring modulator. In other words, the first optical communication device supports a bottom layer reset of the micro-ring controller, or has the function of the bottom layer reset of the micro-ring controller, thereby ensuring the modulation performance of the micro-ring modulator.

[0081] The first condition includes at least one of the following condition 1-condition 3.

[0082] Condition 1: The first optical communication device determines that the received second signal is inconsistent with the second signal to be sent by the second optical communication device. For example, the first optical communication device determines that the first heating information in the received second signal is inconsistent with the first heating information to be sent by the second optical communication device, and / or the average optical power information in the received second signal is inconsistent with the average optical power information to be sent by the second optical communication device, thereby determining that the link between the first optical communication device and the second optical communication device is abnormal, thereby triggering the wavelength alignment initialization process of the micro-ring modulator.

[0083] Condition 2: The first optical communication device determines that the micro-ring modulator is in a wavelength misalignment state, thereby triggering the wavelength alignment initialization process of the micro-ring modulator.

[0084] The first optical communication device can determine that the micro-ring modulator is in a wavelength misalignment state in various ways. For example, the first optical communication device determines that the micro-ring modulator is not at an optimal operating point according to the average optical power information in the second signal, thereby determining that the micro-ring modulator is in a wavelength misalignment state. For another example, the first optical communication device determines that the received first heating information is inconsistent with the first heating information to be sent by the second optical communication device, thereby determining that the micro-ring modulator is in a wavelength misalignment state, and so on.

[0085] Condition 3: First indication information is received, wherein the first indication information is used to instruct the first optical communication device to perform the wavelength alignment initialization process of the micro-ring modulator.

[0086] In an embodiment, the first indication information can be carried in, but not limited to, the second signal. For example, for the case of carrying the first indication information in the second signal, the second optical communication device can carry the first indication information in the second signal to instruct the first optical communication device to perform the wavelength alignment initialization process of the micro-ring modulator when it is determined according to the received first signal that the first optical communication device has wavelength misalignment (such as the received first heating information is inconsistent with the first heating information to be sent by the first optical communication device, etc.).

[0087] As an optional implementation, the wavelength alignment initialization process can include, but is not limited to, the following steps S1-S7, the contents of which are as follows.

[0088] Step S1, the first optical communication device heats the micro-ring modulator according to the second heating information corresponding to the initial heating power. Wherein, the initial heating power can be, but not limited to, configured according to an empirical value.

[0089] Step S2, the first optical communication device sends a third signal to the second optical communication device, wherein the third signal is obtained by modulating the second information and the to-be-transmitted radio frequency information by the micro-ring modulator, the frequency band corresponding to the second information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the second information includes the second heating information.

[0090] Step S3, taking the initial heating power as a reference, repeating steps S1-S2 in a predetermined heating power range according to a predetermined step value until the predetermined heating power range is traversed.

[0091] Wherein, when the heating power control is performed in the predetermined heating power range with a predetermined step value, the wavelength adjustment range of the micro-ring modulator can be not greater than N (N is greater than or equal to 1) free spectral ranges (FSR).

[0092] Step S4, for each third signal received in sequence, the second optical communication device can determine the second heating information and the average optical power information corresponding to the third signal according to the processing manner of the first signal as described above, and save the second heating information and the average optical power information.

[0093] In an embodiment, for each third signal, the second optical communication device can further check the received second heating information with the second heating information to be sent by the first optical communication device through third check information carried in the third signal, similar to the information checking process in the first signal, if consistent, then save the second heating information and the corresponding average optical power information, otherwise, discard. Wherein, the third check information can refer to the description of the first check information, which will not be repeated here.

[0094] Step S5, after determining that the plurality of third signals in the predetermined heating power range are received, the second optical communication device can feed back the saved plurality of pairs of second heating information and average optical power information corresponding to the third signal to the first optical communication device in the form of the fourth signal.

[0095] Wherein, the second optical communication device performs wavelength alignment of the micro-ring modulator by feeding back all the second heating information and the corresponding average optical power information in the wavelength initialization process to the first optical communication device at one time. In this way, resource consumption and power waste caused by multiple information feedback can be avoided; at the same time, resource waste caused by the first optical communication device needing to continuously and multiple times check the fourth signal from the second optical communication device can also be avoided.

[0096] Of course, in the present embodiment, in addition to sending a plurality of pairs of second heating information and average optical power information of the third signal through one fourth signal, as an optional implementation, the second optical communication device can also check the second information in the third signal after receiving each third signal, and feed back a fourth signal to the first optical communication device after checking, and repeat such process until completing all information feedback in the wavelength initialization process. Correspondingly, the first optical communication device determines to receive all fourth signals in the initialization process, and then determines the optimal working point of the micro-ring modulator based on receiving all fourth signals to complete the wavelength alignment of the micro-ring modulator.

[0097] In an optional implementation, the first optical communication device and the second optical communication device have a consistent understanding of the predetermined heating power range or the FSR scanning time corresponding to the predetermined heating power range, so that the second optical communication device can determine whether all third signals in the wavelength alignment initialization process are completed based on the predetermined heating power range or the FSR scanning time corresponding to the predetermined heating power range, thereby ensuring timely feedback of the fourth signal.

[0098] Step S6, the first optical communication device receives a fourth signal from the second optical communication device, wherein the fourth signal comprises a plurality of pairs of the second heating information and the average optical power information of the third signal corresponding to the predetermined heating power range.

[0099] Step S7, the first optical communication device determines the optimal working point of the micro-ring modulator according to the fourth signal to complete the wavelength alignment of the micro-ring modulator.

[0100] The optimal working point of the micro-ring modulator can be understood as the wavelength alignment of the micro-ring modulator, such as the lowest point in the Lorentz curve of the second heating information and the average optical power in the fourth signal, so as to realize the accurate matching of the circumference and working wavelength of the micro-ring.

[0101] In some embodiments, the fourth signal is similar to the second signal described above, for example, as shown in FIG. 7, the fourth signal can also comprise fourth verification information, which is used for the first optical communication device to verify whether the received fourth signal is consistent with the second signal to be sent by the second optical communication device, such as whether the second heating information in the received fourth signal is consistent with the second heating information to be sent by the second optical communication device, whether the average optical power information in the received fourth signal is consistent with the average optical power information to be sent by the second optical communication device, and when consistent, the step of determining the optimal working point of the micro-ring modulator according to the fourth signal is performed again to ensure the accuracy of the optimal working point of the micro-ring modulator, otherwise, the fourth signal is ignored or discarded, and the wavelength initialization process is restarted. As for the fourth verification information, please refer to the description of the second verification information above, which will not be repeated here.

[0102] Based on the description of the wavelength alignment method of the micro-ring modulation described above, the technical scheme provided by the present application can achieve the following technical effects.

[0103] (1) The present application uses the method of determining the average optical power at the receiving side and feeding back to the sending side for optical power monitoring, which cancels the optical power monitoring module in the PIC set in the sending end in the related art, such as the monitoring PD, the waveguide coupler and the monitoring PAD, etc., so that the area occupied by the PIC is greatly reduced, which can be reduced by 30% to 50%, and then the purpose of high-density integration can be realized, and the cost is reduced.

[0104] As for the related functions for wavelength alignment in the present embodiment, they can be realized based on independent functional chips, or based on the chips corresponding to the existing TIA and driver (Driver, DRV), which is not limited here.

[0105] (2) The average optical power is determined at the receiving side and fed back to the transmitting side for optical power monitoring, that is, the average optical power information fed back at the receiving side is used to determine whether to work at the optimal working point, instead of the related art method of setting an optical splitter at the transmitting side to realize optical power monitoring, thereby saving optical power, and under normal circumstances, 5% can be saved.

[0106] (3) By superimposing the heating information on the micro-ring modulator and checking the consistency of the transceiver information, the wavelength alignment judgment result accuracy is improved, the problem of abnormal wavelength alignment judgment result caused by the change of average optical power due to the change of input optical power of the single PD in the related art is avoided, and the reliability of wavelength alignment is improved.

[0107] (4) By configuring the first condition, the first optical communication device can support the bottom layer reset function of the micro-ring modulator, so that when the micro-ring modulator is not at the optimal working point, the wavelength alignment initialization process can be directly started to ensure the modulation performance of the micro-ring modulator.

[0108] (5) By adding specific code stream information, the first optical communication device can monitor the channel quality or channel state of the micro-ring modulator according to the specific code stream information, thereby improving the reliability of wavelength alignment.

[0109] In addition, the application scenarios of the technical solutions provided in the present application can include but are not limited to high-density high-interconnection data centers, high-end routers, servers, computer peripheral devices, etc. Among them, the data center can be but is not limited to an intelligent computing center, such as a data switch, a high-performance computing (HPC) switch, an artificial intelligence (AI) / machine learning (ML) based switch, etc.

[0110] For servers, it can include computing modules such as graphics processing units (GPUs) / data processing units (DPUs) and the like.

[0111] For computer peripheral devices, it can be a computer peripheral device using a peripheral component interconnect express (PCle) and / or a compute express link (CXL), such as a separate memory and resource pool, etc.

[0112] Based on the foregoing description of the wavelength alignment method of the microring modulator, the wavelength alignment method of the microring modulator provided in the present application is further exemplarily described below in combination with examples for the convenience of understanding.

[0113] Example 1

[0114] Please refer to Fig. 5 again. For the sending side, the wavelength alignment process of the microring modulator involved can include two stages, i.e. a wavelength alignment initialization process and a wavelength alignment process in normal operation (also referred to as a wavelength alignment state monitoring process). The implementation processes of the two stages are exemplarily described below respectively. The sending side can be understood as the first optical communication device described above, and the receiving side can be understood as the second optical communication device described above.

[0115] (1) Wavelength alignment initialization process.

[0116] (11) Input the to-be-transmitted radio frequency information, such as a Pseudo-Random Binary Sequence (PRBS), at the RF information (also referred to as RF signal) input of the sending side, wherein the PRBS is used for testing of a high-speed serial channel.

[0117] (12) Start the heating element according to the second heating information corresponding to the initial heating power, so as to heat the microring modulator.

[0118] (13) The sending side can superimpose the second information on the to-be-transmitted radio frequency information and then input the modulated result into the microring modulator to obtain a third signal, and then send the third signal, wherein the second information includes the second heating information and third verification information, and the frequency band of the second information is different from that of the to-be-transmitted radio frequency information.

[0119] (14) Take the initial heating power as a reference, and repeatedly execute (12)-(13) in a predetermined heating power range according to a predetermined step value, until the predetermined heating power range is traversed, i.e. the sending side sends multiple third signals corresponding to different heating powers to the receiving side.

[0120] (15) The receiving side receives multiple third signals from the sending side in sequence, and for each third signal, the second heating information and the average optical power information corresponding to the third signal.

[0121] In an embodiment, when receiving the third signal, the receiving side can first receive the third signal through the PD and the TIA, then mirror the third signal into two paths through the mirror element, such as the fourth sub-signal and the fifth sub-signal, then filter the fourth sub-signal through the first band-pass filter and filter the fifth sub-signal through the second band-pass filter, and finally determine the average optical power information of the third signal according to the filtered fourth sub-signal and determine the second heating information according to the filtered fifth sub-signal.

[0122] (16) For each third signal, after obtaining the second heating information, the receiving side verifies the consistency of the second heating information according to the third verification information carried in the third signal. If the verification is inconsistent, it is discarded. If the verification is consistent, it performs (17).

[0123] (17) In the case of consistent verification, the second heating information is saved corresponding to the average optical power information.

[0124] (18) When the receiving side determines that the traversal of the predetermined heating power range is completed or the FSR scanning time is ended, the receiving side can send the saved multiple pairs of second heating information and average optical transmission power to the sending side in the form of a fourth signal.

[0125] (19) After receiving the fourth signal, the sending side can determine the optimal operating point of the micro-ring modulator according to the multiple pairs of second heating information and average optical transmission power carried in the fourth signal to complete the wavelength alignment process of the micro-ring modulator.

[0126] In an embodiment, after receiving the fourth signal, if the fourth signal carries fourth verification information, the sending side can also verify the consistency of the multiple pairs of second heating information and average optical transmission power information according to the fourth verification information, and in the case of consistency, it is determined that the multiple pairs of second heating information and average optical transmission power are transmitted without error, and then the optimal operating point of the micro-ring modulator can be determined according to the multiple pairs of second heating information and average optical transmission power carried in the fourth signal.

[0127] (2) Wavelength alignment or wavelength alignment state monitoring in normal operation.

[0128] After the optimal working point of the micro-ring modulator at the transmitting side is obtained through the wavelength alignment initialization process shown in (11)-(19) above, considering that the wavelength of the micro-ring modulator may be misaligned due to changes in ambient temperature and the like when normal optical communication transmission is performed based on the optimal working point, the transmitting side can also monitor and fine-tune the wavelength alignment according to the following steps to ensure that the micro-ring modulator always operates at the optimal working point when it is operating normally.

[0129] (21) Input the to-be-transmitted radio frequency information at the RF signal input of the transmitting side.

[0130] (22) Start the heating element according to the first heating information corresponding to the optimal working point to heat the micro-ring modulator.

[0131] That is, heating the micro-ring modulator according to the first heating information can make the micro-ring modulator operate at the optimal working point.

[0132] (23) The transmitting side can superimpose the first information on the to-be-transmitted radio frequency information and then input the modulated first signal obtained by modulating the micro-ring modulator, wherein the first information includes the first heating information and first check information, and the frequency band of the first information is different from that of the to-be-transmitted radio frequency information.

[0133] (24) The receiving side receives the first signal from the transmitting side, and determines the first heating information, the average optical power information corresponding to the first signal, and the first check information according to the first signal.

[0134] In an embodiment, when the receiving side receives the first signal, it can first receive the first signal through a PD and a TIA, then mirror the first signal into two paths, such as a first sub-signal and a second sub-signal, through a mirror element, then filter the first sub-signal through a first band-pass filter and filter the second sub-signal through a second band-pass filter, and finally determine the average optical power information of the first signal according to the filtered first sub-signal, and determine the first heating information and the first check information according to the filtered second sub-signal.

[0135] (25) The receiving side checks the consistency of the first heating information according to the first check information. If the check is inconsistent, it is discarded. If the check is consistent, it performs (26).

[0136] (26) In the case of consistent check, a second signal is sent to the transmitting side, wherein the second signal includes the first heating information, the average optical power information of the first signal, and second check information.

[0137] (27) After receiving the second signal from the sending side, the consistency of the received first heating information and the average optical power information of the first signal is checked according to the second check information. If the consistency is not met, step (28) is performed, otherwise, step (29) is performed.

[0138] (28) In the case of inconsistency, the sending side performs wavelength misalignment state alarm and re-determines the optimal working point of the micro-ring modulator, such as re-performing the wavelength alignment initialization process.

[0139] (29) In the case of consistency, the sending side determines the optimal working point of the micro-ring modulator without fine-tuning the wavelength alignment.

[0140] The difference between the wavelength alignment or wavelength alignment state monitoring in the normal working state shown in the foregoing (21)-(29) and the wavelength alignment initialization process shown in the foregoing (11)-(19) is that the FSR scanning of the micro-ring modulator is not started. However, if it is determined according to the second signal (such as the first check information, specific code stream information, etc.) that the channel or link is abnormal in the normal working state, the wavelength alignment initialization process can also be started or triggered, which will not be described herein again.

[0141] The related steps in the wavelength alignment initialization process and the wavelength alignment process in the normal working state of the micro-ring modulator provided in the present example 1 can refer to the related description in the foregoing method embodiment 400 and achieve the same or corresponding technical effects. To avoid repetition, they will not be described herein again. Of course, in addition to the foregoing related steps, the wavelength alignment initialization process and the wavelength alignment process in the normal working state of the micro-ring modulator provided in the present example 1 can also include more or fewer steps than the foregoing, which is not limited herein.

[0142] In addition, the wavelength alignment related process of the micro-ring modulator in the sending side is described in the present example 1. As a possible implementation manner, for the receiving side, it can also be configured with a micro-ring modulator and perform feedback of the second signal and the fourth signal based on the micro-ring modulator; or the receiving side can be configured with other optical modulators such as MZ modulators, MZI modulators, etc. in addition to the micro-ring modulator, to perform feedback of the second signal and the fourth signal based on the optical modulator.

[0143] For the case where the receiving side is configured with a micro-ring modulator, as shown in FIG. 8a, when performing optical communication between the sending side and the receiving side, the wavelength alignment of the micro-ring modulator can be performed simultaneously or sequentially on the sending side and the receiving side. The wavelength alignment initialization process and the wavelength alignment process in the normal working state of the receiving side are the same as or similar to the wavelength alignment process of the micro-ring modulator of the sending side in the foregoing example 1, and will not be described herein again to avoid repetition.

[0144] As shown in FIG. 8b, for the case that the receiving side is configured with the MZ modulator, when the optical communication between the sending side and the receiving side is performed, the receiving side can directly perform the sending of the second signal and the fourth signal based on the MZ modulator.

[0145] FIG. 9 shows a flow diagram of a wavelength alignment method 600 of a micro-ring modulator provided by an embodiment of the present application. The method can be performed by a first optical communication device. In other words, the method can be performed by software and / or hardware installed in the first optical communication device. As shown in FIG. 6, the method can include the following steps.

[0146] In step S910, a first signal from a first optical communication device is received, wherein a frequency band of first information included in the first signal is different from a frequency band of to-be-transmitted radio frequency information, and the first information includes first heating information of the first optical communication device when the micro-ring modulator is heated.

[0147] In step S920, the first heating information and average optical power information of the first signal are determined according to the first signal.

[0148] In step S930, a second signal is sent to the first optical communication device, wherein the second signal includes the first heating information and the average optical power information of the first signal.

[0149] In some embodiments, the method further includes: determining whether the received first heating information is consistent with first heating information to be sent by the first optical communication device; and determining, in the case of consistency, to perform the step of sending the second signal to the first optical communication device.

[0150] In some embodiments, the first information further includes first check information, and the determination of whether the received first heating information is consistent with the first heating information to be sent by the first optical communication device includes: checking, according to the first check information, whether the received first heating information is consistent with the first heating information to be sent by the first optical communication device.

[0151] In some embodiments, the receiving the first signal from the first optical communication device comprises: mirroring the first signal from the first optical communication device into a first sub-signal and a second sub-signal through a mirror element; filtering the first sub-signal through a first band-pass filter and filtering the second sub-signal through a second band-pass filter, wherein the bandwidth characteristic of the first band-pass filter corresponds to the frequency band of the to-be-transmitted radio frequency information, and the bandwidth characteristic of the second band-pass filter corresponds to the frequency band of the first information; and the determining the first heating information and the average optical power information of the first signal according to the first signal comprises: determining the average optical power information of the first signal according to the filtered first sub-signal, and determining the first heating information according to the filtered second sub-signal.

[0152] In some embodiments, the second signal further comprises second check information, and the second check information is used for the first optical communication device to check whether the received second signal is consistent with the second signal to be transmitted by the second optical communication device.

[0153] In some embodiments, the first information and the second signal further comprise specific code stream information, and the specific code stream information is used for monitoring the channel quality of the micro-ring modulator, and the specific code stream information of the second signal is determined by the second optical communication device according to the specific code stream information in the first information.

[0154] The implementation manners of the wavelength alignment method of the micro-ring modulator provided in the method embodiment 900 have the same or corresponding technical features as the method embodiment 400, and therefore, the related description in the method embodiment 400 can be referred to for the implementation manners in the method embodiment 900, and the same or corresponding technical effects can be achieved. To avoid repetition, no further description is given here.

[0155] The embodiment of the present application further provides a first optical communication device, which comprises an optical chip, a micro-ring modulator integrated on the optical chip, an optical transmitting unit configured to transmit a first signal to a second optical communication device, wherein the first signal is obtained by modulating first information and to-be-transmitted radio frequency information by the micro-ring modulator, the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the first information comprises first heating information used for heating the micro-ring modulator, an optical receiving unit configured to receive a second signal from the second optical communication device, wherein the second signal comprises the first heating information and average optical power information of the first signal, and a controller configured to perform wavelength alignment of the micro-ring modulator according to the second signal.

[0156] In some embodiments, the light receiving unit comprises: a photoelectric conversion unit configured to convert the optical signal received from the second optical communication device into an electrical signal; a transimpedance amplifier configured to amplify the electrical signal; a mirror element configured to mirror the amplified electrical signal to obtain the second signal; a band-pass filter configured to filter the second signal; and an analog-to-digital converter configured to perform analog-to-digital conversion on the filtered second signal.

[0157] In some embodiments, the first optical communication device further comprises a signal generator configured to generate specific code stream information, wherein the specific code stream information is carried in the first information and is used to monitor the channel quality of the micro-ring modulator.

[0158] The implementation manners provided in the device-side embodiments have the same or corresponding technical features as the method embodiments 400, and thus, the related descriptions in the method embodiments 400 can be referred to for the implementation manners in the device-side embodiments, and the same or corresponding technical effects can be achieved. To avoid repetition, no further description is given here.

[0159] The embodiments of the present application also provide a second optical communication device, which comprises a light receiving unit configured to receive a first signal from a first optical communication device, wherein a frequency band of first information included in the first signal is different from a frequency band of to-be-transmitted radio frequency information, and the first information comprises first heating information of the first optical communication device when the micro-ring modulator is heated; a controller configured to determine the first heating information and average optical power information of the first signal according to the first signal; and a light transmitting unit configured to transmit a second signal to the first optical communication device, wherein the second signal comprises the first heating information and the average optical power information of the first signal.

[0160] In some embodiments, the light receiving unit comprises: a photoelectric conversion unit configured to convert the optical signal received from the first optical communication device into an electrical signal; a transimpedance amplifier configured to amplify the electrical signal to obtain the first signal; a mirror element configured to mirror the first signal into a first sub-signal and a second sub-signal; a first band-pass filter configured to filter the first sub-signal and input the controller, wherein the bandwidth characteristic of the first band-pass filter corresponds to the frequency band of the to-be-transmitted radio frequency information; a second band-pass filter configured to filter the second sub-signal and input the controller, wherein the bandwidth characteristic of the second band-pass filter corresponds to the frequency band of the first information; and the controller is further configured to determine whether the heating information is consistent with the heating information to be transmitted by the first optical communication device according to the filtered first sub-signal, and determine the average optical power information of the first signal according to the filtered second sub-signal.

[0161] In some embodiments, the optical transmitting unit comprises an optical modulator, and the optical modulator comprises any one of a micro-ring modulator and an MZ optical modulator.

[0162] In some embodiments, the first information further comprises specific code stream information, and the mirror element is further configured to mirror process the first signal into a third sub-signal; the optical receiving unit further comprises: a third band-pass filter configured to filter the third sub-signal and input the controller, wherein a bandwidth characteristic of the third band-pass filter corresponds to a frequency band of the first information; and the controller is further configured to determine the specific code stream information according to the filtered first sub-signal; wherein the specific code stream information is used to monitor channel quality of the micro-ring modulator, and the second signal comprises the specific code stream information determined according to the filtered first sub-signal.

[0163] The implementation manners provided in the device-side embodiments have the same or corresponding technical features as the method embodiment 400, and therefore, the related description in the method embodiment 400 can be referred to for the implementation manners in the device-side embodiments, and the same or corresponding technical effects are achieved. To avoid repetition, no further description is given here.

[0164] The embodiment of the present application further provides an optical chip, the optical chip is integrated with a micro-ring modulator and a heating element used for heating the micro-ring modulator; the micro-ring modulator is used for modulating first information and to-be-transmitted radio frequency information to obtain a first signal, the first information comprises first heating information when the micro-ring modulator is heated, and a frequency band corresponding to the first information is different from a frequency band corresponding to to-be-transmitted radio frequency information in the first signal.

[0165] In the optical chip provided by the embodiment, the PD, the waveguide coupler, the monitoring PAD and the like in the related art, which are arranged in the PIC and used for implementing the optical monitoring function of wavelength alignment, are cancelled, so that the PIC area can be saved (for example, 30% to 50% can be saved), the micro-ring modulator is implemented with high density, the application range of high-density application is increased, and the implementation cost of wavelength alignment of the micro-ring modulator is reduced.

[0166] The implementation manners provided in the chip-side embodiments have the same or corresponding technical features as the method embodiment 400, and therefore, the related description in the method embodiment 400 can be referred to for the implementation manners in the chip-side embodiments, and the same or corresponding technical effects are achieved. To avoid repetition, no further description is given here.

[0167] FIG. 10 shows a hardware structure diagram of the optical communication device according to an embodiment of the present application. Referring to FIG. 10, at the hardware level, the optical communication device includes a processor, which in an embodiment includes an internal bus, a network interface, and a memory. The memory can include a memory, such as a random-access memory (RAM), and can also include a non-volatile memory, such as at least one disk memory. Of course, the optical communication device can also include other hardware required by the business.

[0168] The processor, the network interface, and the memory can be connected to each other through the internal bus, which can be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only one bidirectional arrow is used in the figure, but it does not mean that there is only one bus or only one type of bus.

[0169] The memory is used to store programs. Specifically, the programs can include program codes including computer operation instructions. The memory can include a memory and a non-volatile memory, and provide instructions and data to the processor.

[0170] The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs, and forms a device for positioning a specified user at the logical level. The processor executes the programs stored in the memory, and specifically is configured to execute the method disclosed in FIG. 4 or FIG. 9 and achieve the functions and advantages of each method described in the foregoing method embodiments, which will not be repeated here.

[0171] The method disclosed in the embodiments of the present application shown in Fig. 4 or Fig. 9 can be applied to a processor or implemented by the processor. The processor can be an integrated circuit chip having a processing capability of signals. In the implementation, each step of the method can be completed by integrated logic circuits of hardware in the processor or instructions in the form of software. The processor can be a general processor, including a central processing unit (CPU), a network processor (NP), etc.; or a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. Each method, step and logic block diagram disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware coding processor for execution, or a combination of hardware and software modules in the coding processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium in the memory is read by the processor, and the hardware thereof is combined to complete the steps of the method.

[0172] The optical communication device can also perform the methods described in the foregoing method embodiments, and achieve the functions and beneficial effects of the methods described in the foregoing method embodiments, which will not be repeated here.

[0173] Of course, in addition to the software implementation, the optical communication device of the present application does not exclude other implementation manners, such as logic devices or a combination of software and hardware, etc. That is, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or a logic device.

[0174] The embodiments of the present application also propose a computer readable storage medium, which stores one or more programs, and when the optical communication device including a plurality of application programs executes the one or more programs, the optical communication device executes the method disclosed in the embodiments of Fig. 4 or Fig. 9 and achieves the functions and beneficial effects of the methods described in the foregoing method embodiments, which will not be repeated here.

[0175] The computer readable storage medium includes a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, etc.

[0176] Further, the embodiment of the present application further provides a computer program product, which comprises a computer program stored in a non-transitory computer readable storage medium, and the computer program comprises program instructions, and when the program instructions are executed by a computer, the following processes are implemented: the method disclosed in the embodiment shown in Fig. 4 or Fig. 9, and the functions and beneficial effects of each method described in the foregoing method embodiments, which are not described here again.

[0177] In summary, the above only describes the preferred embodiments of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0178] The system, device, module or unit illustrated in the above embodiments can be specifically implemented by a computer chip or entity, or by a product with certain functions. A typical implementation device is a computer. Specifically, the computer may, for example, be a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0179] The computer readable medium includes permanent and non-permanent, removable and non-removable media, which can be implemented by any method or technology to store information. The information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, the computer readable medium does not include transitory computer readable media, such as modulated data signals and carriers.

[0180] It is also to be noted that the terms "comprising", "including", and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0181] The various embodiments described in this specification are presented as examples. Each example is provided by way of explanation of the overall subject matter and is not a limitation on the overall subject matter. Changes in, or replacements to, parts of certain examples are covered by this specification. The various embodiments described in this specification are presented as examples. Each example is provided by way of explanation of the overall subject matter and is not a limitation on the overall subject matter. Changes in, or replacements to, parts of certain examples are covered by this specification.

Claims

1. A method of wavelength alignment of a micro-ring modulator, wherein, The method is applied to a first optical communication device, and comprises the following steps: sending a first signal to a second optical communication device, wherein the first signal is obtained by modulating first information and to-be-transmitted radio frequency information by using a micro-ring modulator, the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the first information comprises first heating information used for heating of the micro-ring modulator; receiving a second signal from the second optical communication device, wherein the second signal comprises the first heating information and average optical power information of the first signal; performing wavelength alignment of the micro-ring modulator according to the second signal.

2. The method of claim 1, wherein, The first information further comprises first check information, and the first check information is used for checking consistency between the received first heating information and first heating information to be transmitted by the first optical communication device.

3. The method of claim 1, wherein, Before the wavelength alignment of the micro-ring modulator according to the second signal, the method further comprises the following steps: determining whether the received second signal is consistent with a second signal to be transmitted by the second optical communication device; in the case of consistency, performing the wavelength alignment of the micro-ring modulator according to the second signal.

4. The method of claim 3, wherein, The second signal further comprises second check information, and the determination of whether the received second signal is consistent with the second signal to be transmitted by the second optical communication device comprises the following steps: determining, according to the second check information, whether the first heating information in the received second signal is consistent with first heating information to be transmitted by the second optical communication device and whether the average optical power information in the received second signal is consistent with average optical power information to be transmitted by the second optical communication device.

5. The method of any one of claims 1-4, wherein, The first heating information comprised in the first information is determined based on a wavelength alignment initialization process.

6. The method of any one of claims 1-4, wherein, The method further comprises the following steps: in the case of satisfying a first condition, performing a wavelength alignment initialization process of the micro-ring modulator; wherein the first condition comprises at least one of the following: determining that the received second signal is inconsistent with the second signal to be transmitted by the second optical communication device; determining that the micro-ring modulator is in a wavelength misalignment state; receiving first indication information, wherein the first indication information is used for instructing the first optical communication device to perform the wavelength alignment initialization process of the micro-ring modulator.

7. The method of claim 5 or 6, wherein, The wavelength alignment initialization process comprises the following steps: S1, heating the micro-ring modulator according to second heating information corresponding to an initial heating power; S2, sending a third signal to a second optical communication device, wherein the third signal is obtained by modulating second information and to-be-transmitted radio frequency information by using a micro-ring modulator, the frequency band corresponding to the second information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the second information comprises second heating information of the micro-ring modulator; repeatedly performing S1-S2 in a predetermined heating power range with a predetermined step value as a reference based on the initial heating power until the predetermined heating power range is traversed. receiving a fourth signal from the second optical communication device, wherein the fourth signal comprises a plurality of pairs of the second heating information and average optical power information of the third signal corresponding to the predetermined heating power range; determining an optimal operating point of the micro-ring modulator according to the fourth signal to complete wavelength alignment of the micro-ring modulator.

8. The method of claim 1, wherein, The first information and the second signal further comprise specific code stream information, and the specific code stream information is used to monitor channel quality of the micro-ring modulator, and the specific code stream information of the second signal is determined by the second optical communication device according to the specific code stream information in the first information.

9. The method of claim 8, wherein, The method further comprises: determining, when the received specific code stream information is consistent with the specific code stream information to be sent by the second optical communication device, channel quality of the micro-ring modulator according to the specific code stream information.

10. The method of claim 9, wherein, The consistent information of the specific code stream information is obtained by verifying the second verification information included in the second signal.

11. A method of wavelength alignment of a microring modulator, wherein, The method is applied to a second optical communication device, and the method comprises: receiving a first signal from a first optical communication device, wherein a frequency band of first information included in the first signal is different from a frequency band of to-be-transmitted radio frequency information, and the first information comprises first heating information when the first optical communication device heats a micro-ring modulator; determining the first heating information and average optical power information of the first signal according to the first signal; sending a second signal to the first optical communication device, wherein the second signal comprises the first heating information and the average optical power information of the first signal.

12. The method of claim 11, wherein, The method further comprises: determining whether the received first heating information is consistent with the first heating information to be sent by the first optical communication device; when the determination result is consistent, performing the step of sending the second signal to the first optical communication device.

13. The method of claim 11, wherein, The first information further comprises first verification information, and the determination of whether the received first heating information is consistent with the first heating information to be sent by the first optical communication device comprises: verifying, according to the first verification information, whether the received first heating information is consistent with the first heating information to be sent by the first optical communication device.

14. The method of claim 11, wherein, The receiving of the first signal from the first optical communication device comprises: mirroring the first signal from the first optical communication device into a first sub-signal and a second sub-signal through a mirror element; filtering the first sub-signal through a first band-pass filter and filtering the second sub-signal through a second band-pass filter, wherein a bandwidth characteristic of the first band-pass filter corresponds to the frequency band of the to-be-transmitted radio frequency information, and a bandwidth characteristic of the second band-pass filter corresponds to the frequency band of the first information; The determination of the first heating information and the average optical power information of the first signal according to the first signal comprises: determining the average optical power information of the first signal according to the filtered first sub-signal, and determining the first heating information according to the filtered second sub-signal.

15. The method of claim 11, wherein, The second signal further comprises second check information, which is used for the first optical communication device to check whether the received second signal is consistent with the second signal to be sent by the second optical communication device.

16. The method of claim 11, wherein, The first information and the second signal further comprise specific code stream information, which is used for monitoring the channel quality of the micro-ring modulator, and the specific code stream information of the second signal is determined by the second optical communication device according to the specific code stream information in the first information.

17. A first optical communication device, wherein, The optical chip comprises: a micro-ring modulator integrated on the optical chip; an optical sending unit, configured to send a first signal to a second optical communication device, wherein the first signal is obtained by modulating first information and to-be-transmitted radio frequency information by the micro-ring modulator, the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information, and the first information comprises first heating information used for heating the micro-ring modulator; an optical receiving unit, configured to receive a second signal from the second optical communication device, wherein the second signal comprises the first heating information and average optical power information of the first signal; a controller, configured to perform wavelength alignment of the micro-ring modulator according to the second signal.

18. A second optical communication device, wherein, The optical receiving unit is configured to receive a first signal from a first optical communication device, wherein the first information included in the first signal has a frequency band different from that of to-be-transmitted radio frequency information, and the first information comprises first heating information used for heating the micro-ring modulator by the first optical communication device. The controller is configured to determine the first heating information and average optical power information of the first signal according to the first signal. The optical sending unit is configured to send a second signal to the first optical communication device, wherein the second signal comprises the first heating information and the average optical power information of the first signal. The optical chip comprises a micro-ring modulator and a heating element used for heating the micro-ring modulator.

19. An optical chip, wherein, The micro-ring modulator is configured to modulate first information and to-be-transmitted radio frequency information to obtain a first signal, the first information comprises first heating information used for heating the micro-ring modulator, and the frequency band corresponding to the first information is different from the frequency band corresponding to the to-be-transmitted radio frequency information in the first signal. The computer program is stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1-16 are implemented.

20. An optical communication device, comprising: The computer program is stored in the memory and executable on the processor, and when the computer program is executed by the processor, the steps of the method according to any one of claims 1-16 are implemented.

21. A computer readable medium, wherein, The computer program product comprises a computer program stored in a non-transitory computer readable storage medium, and the computer program comprises program instructions executable by a computer to implement the steps of the method according to any one of claims 1-16.

22. A computer program product, wherein, ​

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