Optical module

Abstract

Disclosed is an optical module, comprising at least two MZM modulators. Each MZM modulator comprises a second optical splitter, interferometer arms, an optical combiner, a third optical splitter, a fourth optical splitter and an optical phase shifter; the second optical splitter, the interferometer arms, the optical combiner, the third optical splitter and the fourth optical splitter are successively connected; the fourth optical splitter is further connected to a first photodetector; the first photodetector is connected to an MCU, such that the MCU reads first monitoring light of the first photodetector, and calculates an output optical power on the basis of the first monitoring light. The optical phase shifters are arranged on interferometer arms, and the optical phase shifters are connected to the MCU, such that the MCU adds a sinusoidal perturbation to the current power of the optical phase shifters, and, on the basis the integral of the product of the power of the optical phase shifters to which the sinusoidal perturbation is added and the output optical power, adjusts the power output to the optical phase shifters; thus, the output optical power can dynamically stay at a minimum point, thereby avoiding deterioration or even failure of the optical shut-off effect caused by aging of optical chips.

Description

Optical module

[0001] This application claims priority to the application filed on July 31, 2024 with the China Patent Office, application number 202411044670.3; the application filed on July 30, 2024 with the China Patent Office, application number 202411038126.8; the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of optical fiber communication, in particular to an optical module. BACKGROUND

[0003] The optical module includes an MCU, the MCU includes a register, the register stores a temperature lookup table, the temperature lookup table includes temperatures, off points and powers of the off points. The MCU finds out the off points and the powers of the off points at the temperatures from the temperature lookup table of the register according to the temperatures, and outputs the powers of the off points to an optical phase shifter. The optical phase shifter adjusts the phase difference of the interference arms according to the powers, so that the outgoing light power reaches a minimum value, i.e., the off point. SUMMARY

[0004] An optical module includes:

[0005] An optical source emits light without carrying data;

[0006] An MCU;

[0007] An optical chip is connected with the MCU, and the optical chip is connected with the optical source, for modulating the light without carrying data into signal light, the optical chip includes:

[0008] A first optical splitter and at least two MZM modulators, an input end of the first optical splitter is used to access the light without carrying data, an output end of the first optical splitter is connected with an input end of the MZM modulator, the MZM modulator includes:

[0009] A second optical splitter, an input end is connected with an output end of the first optical splitter;

[0010] A first interference arm, an input end is connected with a first output end of the second optical splitter;

[0011] A second interference arm, an input end is connected with a second output end of the second optical splitter;

[0012] A combiner, a first input end is connected with an output end of the first interference arm, a second input end is connected with an output end of the second interference arm;

[0013] A third optical splitter, an input end is connected with an output end of the combiner;

[0014] A fourth optical splitter, an input end is connected with a first output end of the third optical splitter;

[0015] a fifth optical splitter, an input end of the fifth optical splitter being connected with the second output end of the third optical splitter,

[0016] a first photodetector, the first photodetector being connected with the first output end of the fourth optical splitter, and being used for monitoring the optical power of the output light; the first photodetector being connected with the MCU, so that the MCU reads the first photodetector signal triggered by the first monitoring light according to the first photodetector, and calculates the optical power of the output light according to the first photodetector signal;

[0017] a second photodetector, the second photodetector being connected with the first output end of the fifth optical splitter, and being used for monitoring the optical power of the auxiliary light; the output light and the auxiliary light having the same amplitude and opposite phase;

[0018] the MZM modulator further comprises an optical phase shifter, the optical phase shifter being arranged on the interference arm; the optical phase shifter is further connected with the MCU, so that the MCU adds a sinusoidal disturbance on the current power of the optical phase shifter, and adjusts the power of the optical phase shifter according to the integral value of the product of the power of the optical phase shifter after the sinusoidal disturbance is added and the optical power of the output light;

[0019] and / or,

[0020] the MCU is configured to receive the optical power of the output light and the optical power of the auxiliary light, calculate the sum of the optical power of the output light and the optical power of the auxiliary light, output an emission abnormal signal when the sum is less than a minimum threshold value or the sum is greater than a maximum threshold value, and output a second control signal to close the silicon light algorithm. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Fig. 1 is a partial structure diagram of an optical communication system according to some embodiments;

[0023] Fig. 2 is a partial structure diagram of a host computer according to some embodiments;

[0024] Fig. 3 is a structure diagram of an optical module according to some embodiments;

[0025] Fig. 4 is an exploded view of an optical module according to some embodiments;

[0026] Fig. 5 is an internal structure diagram of an optical module according to some embodiments;

[0027] FIG. 6 is a structural diagram of an optical chip according to some embodiments;

[0028] FIG. 7 is a relationship diagram of a first MZM modulator and an MCU according to some embodiments;

[0029] FIG. 8 is a relationship diagram of another first MZM modulator and an MCU according to some embodiments;

[0030] FIG. 9 is a relationship curve of power of an optical phase shifter and power of auxiliary light and power of outgoing light according to some embodiments;

[0031] FIG. 10 is a principle diagram of a search algorithm according to some embodiments;

[0032] FIG. 11 is a flow chart of a search algorithm according to some embodiments;

[0033] FIG. 12 is a schematic diagram of an internal structure of an optical module according to some embodiments of the present application;

[0034] FIG. 13 is a schematic diagram of output light and monitoring light according to some embodiments of the present application;

[0035] FIG. 14 is a schematic diagram of a structure of an optical modulation chip according to some embodiments;

[0036] FIG. 15 is a schematic diagram of a structure of an MCU according to some embodiments;

[0037] FIG. 16 is a schematic diagram of a method for monitoring light emitting state of an optical modulation chip according to some embodiments of the present application. DETAILED DESCRIPTION

[0038] Some embodiments of the present disclosure will be described in detail below with reference to the drawings. However, the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided in the present disclosure, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present disclosure.

[0039] Unless the context clearly requires otherwise, throughout the description and the claims, the term "comprise", "comprising", and the like, are to be construed in an open, inclusive and a non-exclusive sense; the terms "first", "second" and the like, are used merely as identifiers not to imply or suggest the relative importance of the elements being described; the term "multiple" means two or more; the term "connected" is to be construed broadly using its ordinary meaning, for example, "connected" can be a fixed connection, or a detachable connection, or integral, or direct, or indirect connection via an intermediate medium; the use of the terms "adapted to" or "configured to" means open and inclusive language that is not to be limited to devices adapted or configured to perform additional tasks or steps; the terms "parallel", "perpendicular", "same", "consistent", "flush" and the like, are not limited to absolute mathematical theoretical relationships, but also include acceptable error ranges in practice, and also include differences based on the same design concept but caused by manufacturing reasons.

[0040] In optical communication technology, in order to establish information transmission between information processing devices, information needs to be loaded onto light, and the transmission of information is achieved by the propagation of light. Here, the light loaded with information is an optical signal. The optical signal can reduce the loss of optical power when transmitted in the information transmission device, so as to achieve high-speed, long-distance and low-cost information transmission. The signal that can be recognized and processed by the information processing device is an electrical signal. The information processing device usually includes an optical network unit (ONU), a gateway, a router, a switch, a mobile phone, a computer, a server, a tablet computer, a television, etc., and the information transmission device usually includes an optical fiber and an optical waveguide, etc.

[0041] The optical module can realize the mutual conversion between the optical signal and the electrical signal between the information processing device and the information transmission device. For example, at least one of the optical signal input end or the optical signal output end of the optical module is connected with an optical fiber, and at least one of the electrical signal input end or the electrical signal output end of the optical module is connected with an optical network unit; a first optical signal from the optical fiber is transmitted to the optical module, the optical module converts the first optical signal into a first electrical signal, and transmits the first electrical signal to the optical network unit; a second electrical signal from the optical network unit is transmitted to the optical module, the optical module converts the second electrical signal into a second optical signal, and transmits the second optical signal to the optical fiber. Since multiple information processing devices can transmit information through electrical signals, at least one of the multiple information processing devices needs to be directly connected with the optical module, without the need for all the information processing devices to be directly connected with the optical module. Here, the information processing device directly connected with the optical module is referred to as the host machine of the optical module. In addition, the optical signal input end or the optical signal output end of the optical module can be referred to as an optical port, and the electrical signal input end or the electrical signal output end of the optical module can be referred to as an electrical port.

[0042] Figure 1 is a partial structure diagram of an optical communication system according to some embodiments. As shown in Figure 1, the optical communication system mainly comprises a remote information processing device 1000, a local information processing device 2000, a host computer 100, an optical module 200, an optical fiber 101, and a network cable 103.

[0043] One end of the optical fiber 101 extends towards the remote information processing device 1000, and the other end of the optical fiber 101 is connected to the optical module 200 through an optical port of the optical module 200. The optical signal can be totally reflected in the optical fiber 101, and the propagation of the optical signal in the total reflection direction can maintain the original optical power. The optical signal is totally reflected multiple times in the optical fiber 101 to transmit the optical signal from the remote information processing device 1000 to the optical module 200, or to transmit the optical signal from the optical module 200 to the remote information processing device 1000, thereby realizing long-distance and low-power-loss information transmission.

[0044] The optical communication system can comprise one or more optical fibers 101, and the optical fiber 101 can be detachably connected or fixedly connected to the optical module 200. The host computer 100 is configured to provide a data signal to the optical module 200, or to receive a data signal from the optical module 200, or to monitor or control the working state of the optical module 200.

[0045] The host computer 100 comprises a housing substantially in the shape of a cuboid, and an optical module interface 102 disposed on the housing. The optical module interface 102 is configured to access the optical module 200 to establish a unidirectional or bidirectional electrical signal connection between the host computer 100 and the optical module 200.

[0046] The host computer 100 further comprises an external electrical interface configured to access an electrical signal network. For example, the external electrical interface comprises a Universal Serial Bus (USB) interface or a network cable interface 104 configured to access a network cable 103 to establish a unidirectional or bidirectional electrical signal connection between the host computer 100 and the network cable 103. One end of the network cable 103 is connected to the local information processing device 2000, and the other end of the network cable 103 is connected to the host computer 100 to establish an electrical signal connection between the local information processing device 2000 and the host computer 100 through the network cable 103. For example, a third electrical signal emitted by the local information processing device 2000 is transmitted to the host computer 100 through the network cable 103, and the host computer 100 generates a second electrical signal according to the third electrical signal. The second electrical signal from the host computer 100 is transmitted to the optical module 200, and the optical module 200 converts the second electrical signal into a second optical signal and transmits the second optical signal to the optical fiber 101. The second optical signal is transmitted in the optical fiber 101 to the remote information processing device 1000. For example, the first optical signal from the remote information processing device 1000 is transmitted through the optical fiber 101, the first optical signal from the optical fiber 101 is transmitted to the optical module 200, the optical module 200 converts the first optical signal into a first electrical signal, the optical module 200 transmits the first electrical signal to the host computer 100, the host computer 100 generates a fourth electrical signal according to the first electrical signal, and the fourth electrical signal is transmitted to the local information processing device 2000. It should be noted that the optical module is a tool for converting optical signals and electrical signals, and the information does not change in the conversion process of the optical signals and the electrical signals, and the encoding and decoding mode of the information can change.

[0047] In addition to the optical network terminal, the host computer 100 further comprises an optical line terminal (OLT), an optical network terminal (ONT), or a data center server, etc.

[0048] FIG. 2 is a partial structure diagram of a host computer according to some embodiments. In order to clearly show the connection relationship between the optical module 200 and the host computer 100, FIG. 2 only shows the structure of the host computer 100 related to the optical module 200. As shown in FIG. 2, the host computer 100 further comprises a PCB circuit board 105 arranged in the shell, a cage 106 arranged on the surface of the PCB circuit board 105, a heat sink 107 arranged on the cage 106, and an electrical connector arranged inside the cage 106. The electrical connector is configured to access the electrical port of the optical module 200; the heat sink 107 has a fin or other protruding structure to increase the heat dissipation area.

[0049] The optical module 200 is inserted into the cage 106 of the host computer 100, and the optical module 200 is fixed by the cage 106. The heat generated by the optical module 200 is conducted to the cage 106, and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected to the electrical connector inside the cage 106, so that the optical module 200 and the host computer 100 are connected in a bidirectional electrical signal connection. In addition, the optical port of the optical module 200 is connected to the optical fiber 101, so that the optical module 200 and the optical fiber 101 are connected in a bidirectional optical signal connection.

[0050] FIG. 3 is a structural diagram of an optical module according to some embodiments, and FIG. 4 is an exploded view of an optical module according to some embodiments. As shown in FIGS. 3 and 4, the optical module 200 includes a shell, a circuit board 300 arranged in the shell, a light source 901, and a light chip 902.

[0051] The shell includes an upper shell 201 and a lower shell 202. The upper shell 201 is covered on the lower shell 202 to form the above-mentioned shell with two openings 204 and 205. The outer contour of the shell generally presents a square body.

[0052] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 arranged perpendicularly to the bottom plate 2021 on both sides of the bottom plate 2021. The upper shell 201 includes a cover plate 2011, which is covered on the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.

[0053] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 arranged perpendicularly to the bottom plate 2021 on both sides of the bottom plate 2021. The upper shell 201 includes a cover plate 2011 and two upper side plates arranged perpendicularly to the cover plate 2011 on both sides of the cover plate 2011. The two upper side plates are combined with the two lower side plates 2022 to achieve that the upper shell 201 is covered on the lower shell 202.

[0054] The direction of the line connecting the two openings 204 and 205 can be consistent with the length direction of the optical module 200, or can be inconsistent with the length direction of the optical module 200. For example, the opening 204 is located at the end of the optical module 200 (the right end of FIG. 3), and the opening 205 is also located at the end of the optical module 200 (the left end of FIG. 3). Alternatively, the opening 204 is located at the end of the optical module 200, and the opening 205 is located at the side of the optical module 200. The opening 204 is an electrical port, and the gold fingers of the circuit board 300 are inserted into the electrical connector of the host computer 100. The opening 205 is an optical port, which is configured to access the external optical fiber 101, so that the optical fiber 101 is connected to the light source 901 and the light chip 902 in the optical module 200.

[0055] The upper shell 201 and the lower shell 202 are combined to facilitate the installation of the circuit board 300, the light source 901, and the light chip 902 into the shells, and the shells can protect the devices. In addition, the positioning components, heat dissipation components, and electromagnetic shielding components of the devices can be arranged when the circuit board 300, the light source 901, and the light chip 902 are assembled, which facilitates the automated production.

[0056] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials to facilitate electromagnetic shielding and heat dissipation.

[0057] In some embodiments, the optical module 200 further includes an unlocking component 600 outside the shell. The unlocking component 600 is configured to achieve the fixed connection between the optical module 200 and the host computer or to release the fixed connection between the optical module 200 and the host computer.

[0058] For example, the unlocking component 600 is located outside the two lower side plates 2022 of the lower shell 202 and includes a clamping component matched with the cage 106 of the host computer 100. When the optical module 200 is inserted into the cage 106, the clamping component of the unlocking component 600 fixes the optical module 200 in the cage 106. When the unlocking component 600 is pulled, the clamping component of the unlocking component 600 moves, thereby changing the connection relationship between the clamping component and the host computer, releasing the fixation between the optical module 200 and the host computer, and allowing the optical module 200 to be pulled out of the cage 106.

[0059] The circuit board 300 includes circuit traces, electronic components, and chips, etc. The electronic components and chips are connected according to the circuit design through the circuit traces to achieve power supply, electrical signal transmission, and grounding functions. The electronic components may, for example, include capacitors, resistors, transistors, and metal oxide semiconductor field effect transistors (MOSFETs). The chips may, for example, include microcontroller units (MCUs), laser drive chips, transimpedance amplifiers (TIAs), limiting amplifiers (LIAs), clock and data recovery chips (CDRs), power management chips, and digital signal processing (DSP) chips.

[0060] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize a bearing function. For example, the rigid circuit board can stably bear the electronic components and chips. The rigid circuit board can also be inserted into the electrical connector in the cage 106 of the host computer 100.

[0061] The circuit board 300 also includes a gold finger formed on the end surface thereof. The gold finger is composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106, and the gold finger is in conduction with the electrical connector in the cage 106. The gold finger can be arranged on only one surface (for example, the upper surface shown in FIG. 4) of the circuit board 300, or can be arranged on both upper and lower surfaces of the circuit board 300 to provide a larger number of pins, thereby adapting to occasions where a large number of pins are required. The gold finger is configured to establish electrical connection with the host computer to realize power supply, grounding, Inter-Integrated Circuit (I2C) signal transmission, data signal transmission, and the like. Of course, a flexible circuit board is also used in some optical modules. The flexible circuit board is generally used in cooperation with the rigid circuit board to supplement the rigid circuit board.

[0062] The light source 901 is a distributed feedback light source, which is different in that a Bragg grating is built in, and belongs to a side-emitting semiconductor light source. At present, the distributed feedback light source mainly uses semiconductor materials as the medium, including gallium antimonide, gallium arsenide, indium phosphide, zinc sulfide, and the like. The biggest feature of the distributed feedback light source is that it has very good monochromaticity, and its line width can generally be made within 1 MHz, and has a very high edge modulation suppression ratio, which can be as high as 40-50 dB or more at present.

[0063] The light source 901 is used to output light that does not carry data. Specifically, the bottom surface of the light source 901 is arranged on the substrate, and the light source 901 emits light through the side surface. The light output by the light source 901 enters the optical chip 902. The optical chip 902 uses silicon as the main base material, and silicon is not an ideal light-emitting material. Therefore, the light source 901 cannot be integrated in the optical chip 902, and an external light source 901 is required to provide the light source 901. The light provided by the light source 901 to the optical chip 902 is light with a single wavelength and stable power, and does not carry data. The light is modulated by the optical chip 902 to realize loading of data into the light.

[0064] The optical chip 902 is arranged on the circuit board 300 and is electrically connected to the circuit board 300. Specifically, the optical chip 902 can be connected to the circuit board 300 by wire bonding. The periphery of the silicon optical chip is connected to the circuit board 300 by a plurality of conductive wires. Therefore, the optical chip 902 is generally arranged on the surface of the circuit board 300.

[0065] The optical chip 902 and the light source 901 can be optically connected through an optical fiber ribbon. The optical chip 902 receives light from the light source 901 through the optical fiber ribbon, and then modulates the light, specifically, loads signals onto the light. The optical chip 902 and the optical fiber socket 600 are optically connected through an optical fiber ribbon. The optical fiber socket 600 realizes optical connection with an external optical fiber of the optical module. The light modulated by the optical chip 902 is transmitted to the optical fiber socket 600 through the optical fiber ribbon, and then transmitted to the external optical fiber through the optical fiber socket 600. The light from the external optical fiber is transmitted to the optical fiber ribbon through the optical fiber socket 600, and then transmitted to the optical chip 902 through the optical fiber ribbon. Thus, the optical chip 902 outputs light carrying data to the external optical fiber of the optical module, or receives light carrying data from the external optical fiber of the optical module.

[0066] In some embodiments, the optical chip 902 can include an MZM modulator (Mach-Zehnder Modulator). The MZM modulator can include a first interference arm and a second interference arm. The first interference arm can be provided with a first modulation electrode, and the second interference arm can include a second modulation electrode. The light emitted by the light source 901 is input into the MZM modulator, and the signal modulation of the light is realized through the modulation electrode to obtain signal light.

[0067] FIG. 5 is an internal structure diagram of an optical module according to some embodiments. FIG. 6 is a structure diagram of an optical chip according to some embodiments. As shown in FIGS. 5 and 6, in some embodiments, the circuit board 300 can be provided with an MCU 301.

[0068] As shown in FIGS. 5 and 6, in some embodiments, the optical chip 902 can include at least two MZM modulators. The at least two MZM modulators modulate the light not carrying data into signal light.

[0069] As shown in FIGS. 5 and 6, in some embodiments, the optical chip 902 can include a first optical splitter. The input end of the first optical splitter can be optically connected with the light source 901. The output end of the first optical splitter can be connected with the at least two MZM modulators. The first optical splitter can divide 1 light into 4 lights, so that the at least two MZM modulators can modulate the 4 lights into 4 signal lights.

[0070] In some embodiments, the at least two MZM modulators can include a first MZM modulator and a second MZM modulator. The input end of the first MZM modulator can be connected with the first output end of the first optical splitter, and the input end of the second MZM modulator can be connected with the second output end of the first optical splitter.

[0071] In some embodiments, the at least two MZM modulators can include a third MZM modulator. The input end of the third MZM modulator can be connected with the third output end of the first optical splitter.

[0072] In some embodiments, the at least two MZM modulators can include a fourth MZM modulator. An input end of the fourth MZM modulator can be connected with a fourth output end of the first optical splitter.

[0073] The at least two MZM modulators include a first MZM modulator, a second MZM modulator, a third MZM modulator, and a fourth MZM modulator, so that the MZM modulator group can modulate 4-way light into 4-way signal light.

[0074] Since the structures of each MZM modulator are the same, the connection relationship between the first MZM modulator and the MCU can be introduced as an example.

[0075] FIG. 7 is a relationship diagram of a first MZM modulator and a MCU according to some embodiments. FIG. 8 is another relationship diagram of a first MZM modulator and a MCU according to some embodiments. As shown in FIGS. 7 and 8, in some embodiments, the first MZM modulator can include a second optical splitter. An input end of the second optical splitter can be connected with a first output end of the first optical splitter. The second optical splitter can divide the 1-way light after the first optical splitter into 2-way light.

[0076] As shown in FIGS. 7 and 8, in some embodiments, the first MZM modulator can include an interference arm.

[0077] In some embodiments, the interference arm can include a first interference arm. An input end of the first interference arm can be connected with a first output end of the second optical splitter, so that the 1-way light after the second optical splitter is transmitted to the first interference arm.

[0078] In some embodiments, the interference arm can include a second interference arm. An input end of the second interference arm can be connected with a second output end of the second optical splitter, so that the 1-way light after the second optical splitter is transmitted to the second interference arm.

[0079] As shown in FIGS. 7 and 8, in some embodiments, the first MZM modulator can include a modulation electrode. The modulation electrode can be arranged on the interference arm. The modulation electrode adjusts the amplitude of the light to modulate the light input into the interference arm.

[0080] In some embodiments, a first modulation electrode can be arranged on the first interference arm. The first modulation electrode acts on the first interference arm to modulate the light input into the first interference arm.

[0081] In some embodiments, a second modulation electrode can be arranged on the second interference arm. The second modulation electrode acts on the second interference arm to modulate the light input into the second interference arm.

[0082] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include a combiner. A first input end of the combiner can be connected with the first interference arm. A second input end of the combiner can be connected with the second interference arm. The combiner can combine the light transmitted by the first interference arm to the combiner and the light transmitted by the second interference arm to the combiner.

[0083] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include a third splitter. An input end of the third splitter can be connected with an output end of the combiner.

[0084] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include a fourth splitter. An input end of the fourth splitter can be connected with a first output end of the third splitter. A first output end of the fourth splitter is connected with the light outlet of the optical chip 902, so that the emergent light output by the first output end of the fourth splitter is output through the light outlet of the optical chip 902.

[0085] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include a fifth splitter. An input end of the fifth splitter can be connected with a second output end of the third splitter.

[0086] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include a first photodetector 403. The first photodetector 403 can be connected with a second output end of the fourth splitter, so as to trigger a first photodetection signal according to the first monitoring light output by the second output end of the fourth splitter.

[0087] The MCU 301 can be connected with the first photodetector 403 to obtain the first photodetection signal, and the emergent light optical power can be calculated according to the first photodetection signal.

[0088] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include a second photodetector 402. The second photodetector 402 can be connected with an output end of the fifth splitter, so as to trigger a second photodetection signal according to the second monitoring light output by the output end of the fifth splitter.

[0089] The MCU 301 can be connected with the second photodetector 402 to obtain the second photodetection signal, and the auxiliary light optical power can be calculated according to the second photodetection signal.

[0090] As shown in FIG. 7 and FIG. 8, in some embodiments, the first MZM modulator can include an optical phase shifter. The optical phase shifter can be arranged on the interference arm. The optical phase shifter modulates the light input into the interference arm by adjusting the phase of the light.

[0091] In some embodiments, the optical phase shifter can be a heater. The power of the heater is adjusted by adjusting the current of the heater, which in turn adjusts the temperature of the interference arm, and thus the refractive index of the interference arm.

[0092] In some embodiments, the optical phase shifter can be an electrode. The power of the electrode is adjusted by adjusting the voltage of the electrode, which in turn adjusts the concentration of carriers in the interference arm, and thus the refractive index of the interference arm.

[0093] In some embodiments, the optical phase shifter can include a first optical phase shifter. The first optical phase shifter can be disposed on the first interference arm. The first optical phase shifter modulates the light input into the first interference arm by adjusting the phase of the light.

[0094] In some embodiments, the optical phase shifter can include a second optical phase shifter. The second optical phase shifter can be disposed on the second interference arm. The second optical phase shifter modulates the light input into the second interference arm by adjusting the phase of the light.

[0095] As shown in FIG. 7, the optical phase shifter is disposed on the first interference arm or the second interference arm.

[0096] As shown in FIG. 8, the first optical phase shifter is disposed on the first interference arm, and the second optical phase shifter is disposed on the second interference arm.

[0097] FIG. 9 is a graph showing the relationship between the power of the optical phase shifter and the optical power of the auxiliary light and the optical power of the output light according to some embodiments. The abscissa of FIG. 9 is the power of the optical phase shifter, and the ordinate of FIG. 9 is the optical power. As shown in FIG. 9, the power of the optical phase shifter has a corresponding relationship with the optical power of the output light and the optical power of the auxiliary light. The MCU can control the optical power of the output light and the optical power of the auxiliary light by setting the power of the optical phase shifter to make the optical power of the output light reach the average optical power, i.e., lock the operating point in the figure.

[0098] The MCU can determine whether the first MZM modulator is at the operating point according to the optical power of the output light and the optical power of the auxiliary light. When the first MZM modulator deviates from the operating point, the power of the optical phase shifter is adjusted to change the phase on the interference arm of the first MZM modulator, which reduces the difference in optical intensity between the output light and the auxiliary light, and thus maintains the first MZM modulator at the operating point.

[0099] As shown in FIG. 9, the power of the optical phase shifter has a corresponding relationship with the optical power of the output light, and the optical power of the output light can be controlled to reach a minimum value by setting the power of the optical phase shifter, i.e., lock the off light point in the figure.

[0100] Since the power of the optical phase shifter is equal to (the current of the optical phase shifter) 2The product of the voltage of the optical phase shifter and the resistance of the optical phase shifter, so the MCU can calculate the current of the optical phase shifter through the power of the optical phase shifter, and output the current to the optical phase shifter to adjust the power of the optical phase shifter, and then adjust the refractive index of the interference arm.

[0101] The power of the optical phase shifter is equal to the voltage of the optical phase shifter multiplied by the resistance of the optical phase shifter, so the MCU can calculate the voltage of the optical phase shifter through the power of the optical phase shifter, and output the voltage to the optical phase shifter to adjust the power of the optical phase shifter, and then adjust the concentration of the carriers in the interference arm, thereby adjusting the refractive index of the interference arm. 2 The power of the optical phase shifter is equal to the voltage of the optical phase shifter multiplied by the resistance of the optical phase shifter, so the MCU can calculate the voltage of the optical phase shifter through the power of the optical phase shifter, and output the voltage to the optical phase shifter to adjust the power of the optical phase shifter, and then adjust the concentration of the carriers in the interference arm, thereby adjusting the refractive index of the interference arm.

[0102] As shown in FIG. 6, the optical chip includes a plurality of MZM modulators, one MZM modulator, a first photodetector and a second photodetector form a channel, and the plurality of MZM modulators and the corresponding first photodetector and second photodetector form a plurality of channels. One channel of the optical chip can output one channel of signal light. The optical module has the function of individually controlling the output light power of the signal light of each channel to reach the minimum value point, that is, the signal light is at the off light point. If the light source is controlled to be off, the optical chip cannot output signal light. If you want to control the output light power of the signal light of a certain MZM modulator to reach the minimum value point, that is, the off light point, you only need to individually control a certain MZM modulator.

[0103] As shown in FIG. 7, the MCU controls the power of the optical phase shifter to control the output light power to reach the minimum value, that is, the off light point.

[0104] As shown in FIG. 8, the MCU controls the power of the first optical phase shifter and the power of the second optical phase shifter to control the output light power to reach the minimum value, that is, the off light point.

[0105] But the off light point is not fixed and is easily affected by temperature. In some embodiments, the temperature lookup table is stored in the register of the MCU 301, and the temperature lookup table includes temperature, off light point and power of the off light point. The MCU 301 looks up the off light point and the power of the optical phase shifter corresponding to the off light point at the temperature from the temperature lookup table according to the temperature, and outputs the power of the optical phase shifter corresponding to the off light point to the optical phase shifter. The optical phase shifter adjusts the phase difference of the interference arm according to the power, so that the output light power reaches the minimum value, that is, the off light point.

[0106] However, the off light point is affected not only by temperature but also by the aging degree of the optical chip. The off light point will have different shifts when the aging degree of the optical chip is different. If the off light point is still adjusted by using the temperature lookup table at this time, deviation will inevitably occur, thereby leading to poor light-off effect or even failure. In order to solve this problem, in some embodiments, a search algorithm is provided. The specific process of the search algorithm is as follows: a sinusoidal perturbation is added to the current power of the optical phase shifter, and the integral value of the product of the power of the optical phase shifter after the sinusoidal perturbation is added and the light power of the outgoing light is calculated to determine whether the integral value is equal to 0; if the integral value is greater than 0, the power of the optical phase shifter is controlled to decrease until the integral value is equal to 0; if the integral value is less than 0, the power of the optical phase shifter is controlled to increase until the integral value is equal to 0; if the integral value is equal to 0, it is kept unchanged. According to the adjustment of the power of the optical phase shifter according to the integral value, the light power of the outgoing light can be dynamically adjusted, so that the light power of the outgoing light can be dynamically located at the minimum point, thereby avoiding the poor light-off effect or even failure caused by the aging of the optical chip.

[0107] FIG. 10 is a schematic diagram of a search algorithm according to some embodiments. As shown in FIG. 10, u represents the power of the optical phase shifter, f(u) represents the light power of the “outgoing light”, u’ represents the power of the optical phase shifter corresponding to the current minimum value, and f(u’) represents the light power of the outgoing light corresponding to the current minimum value.

[0108] If the current power of the optical phase shifter is on the left side of u’, which is the position of u1 on the graph, at this time the algorithm adds a sinusoidal perturbation centered at u1, as shown in the graph u i1 The sinusoidal perturbation will form a gray part similar to the sinusoidal graph marked in f(u i1 ) on the light power of the outgoing light.

[0109] Then the gray part of u i1 is multiplied by the gray part of f(u i1 ) and accumulated, that is, the integral of the product: ∫[u i1 ×f(u i1 )].

[0110] Because u1 and f(u i1 ) are inversely proportional, ∫[u i1 ×f(u i1 )] < 0.

[0111] Similarly, if the current power of the optical phase shifter is on the right side of u’, which is the position of u2 on the graph, after similar calculation, ∫[u i2 ×f(u i2 )] > 0.

[0112] FIG. 11 is a flowchart of a search algorithm according to some embodiments. As shown in FIG. 11, the search algorithm includes:

[0113] S100: adding a sinusoidal perturbation to the current power of the optical phase shifter.

[0114] S200: calculating the integral value of the product of the power of the optical phase shifter after adding the sinusoidal perturbation and the output light power.

[0115] It is determined whether the integral value is equal to 0. If the integral value is equal to 0, it indicates that the current power of the optical phase shifter is located at the minimum point, and then it is kept unchanged. If the integral value is not equal to 0, it indicates that the current power of the optical phase shifter deviates from the minimum point, and it is determined whether the integral value is greater than 0.

[0116] S300: if the integral value is greater than 0, the power of the optical phase shifter is controlled to decrease until the integral value is equal to 0.

[0117] If the integral value is greater than 0, it indicates that the current power of the optical phase shifter is located to the right of the extreme value, as shown by u2 in FIG. 10. If the integral value is greater than 0, the power of the optical phase shifter is controlled to stepwise decrease until the integral value is equal to 0. Step = K*integral value, K is a positive number greater than 0.

[0118] S400: if the integral value is less than 0, the power of the optical phase shifter is controlled to increase until the integral value is equal to 0.

[0119] If the integral value is less than 0, it indicates that the current power of the optical phase shifter is located to the left of the extreme value, as shown by u1 in FIG. 10. If the integral value is less than 0, the power of the optical phase shifter is controlled to stepwise increase until the integral value is equal to 0. Step = K*integral value, K is a positive number greater than 0.

[0120] According to the adjustment of the power of the optical phase shifter based on the integral value, the output light power can be dynamically adjusted, so that the output light power can be dynamically located at the minimum point, thereby avoiding the deterioration of the light-off effect caused by the aging of the optical chip, and even avoiding the failure.

[0121] In some embodiments, FIG. 12 is a schematic diagram of the internal structure of an optical module provided by the embodiments of the present application. As shown in FIG. 12, the optical chip 902 further includes an input light port and an output light port. The input light port is used for transmitting light without carrying signals from the light source 500 into the optical chip 902, and the output light port is used for outputting the signal light after the split beam is modulated by the MZM modulator.

[0122] The input end of the second optical splitter can be connected with the input light port of the optical chip 902. For example, the input end of the second optical splitter can be connected with the light source 500 through the first optical splitter to receive the light input into the optical chip 902 from the light source 500; the first output end of the second optical splitter is connected with the input end of the first interference arm; the second output end of the second optical splitter is connected with the input end of the second interference arm, and the second optical splitter divides the received light into two parts and transmits them to the first interference arm and the second interference arm respectively. The ratio of the light power split by the first optical splitter to the first interference arm and the second interference arm is 1:1.

[0123] In some embodiments, the first modulation electrode and the heater on the first interference arm jointly act on the first interference arm to modulate the light input into the first interference arm. The second modulation electrode on the second interference arm acts on the second interference arm to modulate the light input into the second interference arm. The output ends of the first interference arm and the second interference arm are respectively connected to the input ends of the combiner, and the combiner performs combining processing on the light input into the first interference arm and the second interference arm. The output end of the combiner is connected to the input end of the third beam splitter, the first output end of the third beam splitter is connected to the input end of the fourth beam splitter, and the second output end of the third beam splitter is connected to the input end of the fifth beam splitter.

[0124] The first output end of the fourth beam splitter is connected to the output light port, and the second output end of the fourth beam splitter is used for transmitting the split light to the first photodetector 403; the first output end of the fourth beam splitter transmits the split light to the second photodetector 402. In the embodiment, the third beam splitter splits the light from the combiner into the output light and the monitoring light, and the fourth beam splitter and the fifth beam splitter are used to detect the light intensity of the output light and the light intensity of the monitoring light.

[0125] In some embodiments, the output light and the monitoring light output by the third beam splitter are two orthogonal lasers, that is, the output light and the monitoring light have the same amplitude but opposite phases. FIG. 13 is a schematic diagram of the output light and the monitoring light according to some embodiments of the present application. As shown in FIG. 13, the output light and the monitoring light are orthogonally distributed, and the optimal working point is the point indicated by the circle in the figure. At this position, when the modulation electric input signal changes around the bias voltage point, the modulated output light signal will change basically according to the corresponding rule of the modulation electric signal, thereby realizing the modulation of information.

[0126] The fourth beam splitter splits a certain proportion of light from the output light to the first photodetector 403, and the fifth beam splitter splits a certain proportion of light from the monitoring light to the second photodetector 402.

[0127] The splitting ratio of the fourth beam splitter and the splitting ratio of the fifth beam splitter can be the same or different. For convenience of calculation, the splitting ratio of the fourth beam splitter and the splitting ratio of the fifth beam splitter are the same. For example, the fourth beam splitter splits 2% of the light from the output light to the first photodetector 403, and the fifth beam splitter splits 2% of the light from the monitoring light to the second photodetector 402. The first photodetector 403 receives the output light output from the second output end of the fourth beam splitter and generates a first photocurrent according to the received output light. The second photodetector 402 receives the output light output from the second output end of the fifth beam splitter and generates a second photocurrent according to the received output light.

[0128] The light intensity of the output light and the light intensity of the monitoring light are also in quadrature, and the light intensity of the output light and the light intensity of the monitoring light cannot simultaneously reach a minimum value or a maximum value.

[0129] The MCU 301 can be connected with the first photodetector 402, and the MCU 301 can obtain the first photocurrent and calculate the light power of the output light. The MCU 301 can be connected with the second photodetector 403, and the MCU 301 can obtain the second photocurrent and calculate the light power of the monitoring light.

[0130] When the first beam splitter is damaged, the light intensity of the output light and the light intensity of the monitoring light cannot be in quadrature distribution, and at this time, the optimal working point of the MZM modulator cannot be accurately controlled, which will cause the output light to be unstable and the optical device to be easily damaged. In order to solve the above problems, the MCU 301 can be configured to: calculate the sum of the light power of the monitoring light and the light power of the output light; when the sum is greater than or equal to a minimum threshold value and the sum is less than or equal to a maximum threshold value, obtain the data of the light-emitting control bit; when the light-emitting control bit is a first preset data, output an emission normal signal and start the silicon light algorithm. When the sum is greater than the maximum threshold value or the sum is less than the minimum threshold value, output an emission abnormal signal. When the sum is greater than or equal to the minimum threshold value and the sum is less than or equal to the maximum threshold value, and the light-emitting control bit is a second preset data, output an emission abnormal signal and close the silicon light algorithm. The light power of the output light can meet the preset value due to the damage of the beam splitter of the optical modulation chip, but the difference between the auxiliary light power and the output light power is too large, and the optimal working point cannot be calculated to control the Mach-Zehnder electro-optical modulator in the optical modulation chip to be stable at the working point, thereby improving the stability of the optical modulation chip.

[0131] In some embodiments, the maximum threshold value is less than or equal to the light power of the input end of the first beam splitter. The minimum threshold value is greater than or equal to one-eighth of the light power of the input end of the first beam splitter.

[0132] FIG. 14 is a schematic diagram of an optical modulation chip structure according to some embodiments. As shown in FIG. 14, the optical modulation chip can include a plurality of MZM modulators to realize the modulation of a plurality of signals. For example, the optical modulation chip can include a first beam splitter. The input end of the first beam splitter is connected with the input optical port of the optical chip 902, and the first beam splitter has four output ends, each of which is connected with an MZM.

[0133] In some embodiments, the light power of the input end of the second beam splitter is equal to one-fourth of the light power of the input end of the first beam splitter.

[0134] In some embodiments, the maximum threshold can be less than or equal to one fourth of the optical power of the input end of the first optical splitter. The minimum threshold can be greater than or equal to one thirty-second of the optical power of the input end of the first optical splitter.

[0135] FIG. 15 is a schematic diagram of an MCU structure according to some embodiments. As shown in FIG. 15, in some embodiments, the MCU can include a first register. The first register is electrically connected to the host computer.

[0136] The host computer can write a control value to the first register. For example, when the host computer outputs a light-emitting control instruction, the control value of the light-emitting control bit written to the first register is a first preset data. When the host computer outputs a light-off control instruction, the value of the light-emitting control bit written is a second preset data. For example, the first preset data can be 0, and the second preset data can be 1.

[0137] In some embodiments, the MCU can include a second register. The second register can be used to store the minimum threshold and the maximum threshold. In some embodiments, the maximum threshold is less than or equal to the optical power of the input end of the first optical splitter. The minimum threshold is greater than or equal to one fourth of the optical power of the input end of the first optical splitter.

[0138] The MCU can include a third register. The third register can be used to store state data of the light-emitting signal.

[0139] The MCU can include a first calculator. The first calculator is connected to the first register and the second register. The first calculator can obtain the optical power of the monitoring light and the optical power of the output light, and calculate the sum of the optical power of the monitoring light and the optical power of the output light. The first calculator can obtain the data in the first register and the second register.

[0140] The first calculator can be configured to: when the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, write normal state data to the third register; obtain the value of the light-emitting control bit, and when the value of the light-emitting control bit is the first preset data, output a first control signal to the second calculator to make the second calculator start the operation of the silicon light algorithm. For example, the normal state data can be a third preset data, such as 0.

[0141] When the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, it indicates that the current light-emitting power is normal.

[0142] When the value of the light-emitting control bit is the first preset data, it indicates that the host computer outputs a light-emitting instruction, and the light modulation chip needs to perform light-emitting work.

[0143] When the sum is less than the minimum threshold, a second control signal is output to the second operator to stop the silicon light algorithm operation, and abnormal state data is written into the third register. The host computer obtains the state data of the current light emission signal by reading the value of the third register. For example, the abnormal state data can be fourth preset data, such as 1.

[0144] When the sum is greater than the maximum threshold, a second control signal is output to the second operator to stop the silicon light algorithm operation, and abnormal state data is written into the third register. The host computer obtains the state data of the current light emission signal by reading the value of the third register. For example, the abnormal state data can be fourth preset data, such as 1.

[0145] When the sum is greater than the maximum threshold or the sum is less than the minimum threshold, it indicates that the current light emission power is abnormal. A second control signal is output to the second operator to stop the silicon light algorithm operation.

[0146] The first operator can be configured to: when the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, write normal state data into the third register; obtain the value of the light emission control bit, and when the value of the light emission control bit is the second preset data, output a second control signal to the second operator to close the silicon light algorithm operation.

[0147] When the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, it indicates that the current light emission power is normal.

[0148] When the value of the light emission control bit is the second preset data, it indicates that the host computer outputs a light-off instruction, and the light modulation chip does not need to perform light emission work.

[0149] In the embodiment of the application, the sum of the light power of the monitoring light and the light power of the output light is calculated. When the sum is less than the minimum threshold or greater than the maximum threshold, it indicates that the light splitter of the light modulation chip is damaged or the input light intensity is insufficient. When the sum is less than the minimum threshold or greater than the maximum threshold, the emission abnormality is reported, and the silicon light algorithm operation is closed, which can avoid the situation that the light power of the output light meets the preset value due to the damage of the light splitter of the light modulation chip, but the difference between the auxiliary light power and the output light power is too large, and the optimal working point cannot be calculated.

[0150] The sum of the optical power of the monitoring light and the optical power of the output light is calculated; when the sum is greater than or equal to a minimum threshold value and the sum is less than or equal to a maximum threshold value, the data of the light-emitting control bit is obtained; when the light-emitting control bit is the first preset data, the silicon light algorithm is started. When the sum is greater than the maximum threshold value and the sum is less than or equal to the minimum threshold value, an output power abnormality alarm is output. When the sum is greater than or equal to the minimum threshold value and the sum is less than or equal to the maximum threshold value, and the light-emitting control bit is the second preset data, an emission abnormality signal is output, and the silicon light algorithm is closed. The stability of the light modulation chip can be improved.

[0151] FIG. 16 is a schematic diagram of a method for monitoring the light-emitting state of a light modulation chip according to some embodiments of the present application. As shown in FIG. 16, the method for monitoring the light-emitting state of the light modulation chip can include:

[0152] S500: The optical power of the monitoring light and the optical power of the output light are obtained.

[0153] S600: The sum of the optical power of the monitoring light and the optical power of the output light is calculated.

[0154] S700: When the sum is greater than or equal to a minimum threshold value and the sum is less than or equal to a maximum threshold value, an emission normality signal is output; the data of the light-emitting control bit is obtained, and when the light-emitting control bit is the first preset data, a first control signal is output to start the silicon light algorithm operation.

[0155] In some embodiments, outputting the emission normality signal can be writing normal state data to the light-emitting control bit of the third register; the normal state data can be the third preset data.

[0156] Starting the silicon light algorithm operation can be outputting the first control signal to the second operator to make the second operator start the silicon light algorithm operation.

[0157] S800: When the sum is greater than or equal to a minimum threshold value and the sum is less than or equal to a maximum threshold value, an emission normality signal is output; the data of the light-emitting control bit is obtained, and when the light-emitting control bit is the second preset data, a second control signal is output to close the silicon light algorithm operation.

[0158] S900: When the sum is greater than the maximum threshold value or the sum is less than the minimum threshold value, an emission abnormality signal is output, and a second control signal is output to close the silicon light algorithm.

[0159] In some embodiments, outputting the emission abnormality signal can be writing abnormal state data to the light-emitting control bit of the third register; the abnormal state data can be the fourth preset data.

[0160] The operation of the silicon light algorithm can be outputting a second control signal to the second operator to make the second operator close the silicon light algorithm operation. The light power of the output light can meet the preset value due to the damage of the optical splitter of the light modulation chip, but the difference between the auxiliary light power and the output light power is too large, and the optimal working point cannot be calculated to control the Mach-Zehnder electro-optical modulator in the light modulation chip to be stable at the working point, thereby improving the stability of the light modulation chip.

[0161] Since the above embodiments are described in combination with other manners, the same parts exist between different embodiments, and the same and similar parts between various embodiments in the specification can be referred to each other. Herein, no further detailed description is given.

[0162] It should be noted that in the specification, the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the circuit structure, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such circuit structure, article or device. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of another identical element in the circuit structure, article or device including the element.

[0163] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light module comprising: a light source emitting light without carrying data; an MCU; a light chip connected with the MCU, and the light chip is connected with the light source, for modulating the light without carrying data into signal light, the light chip comprising: a first beam splitter, an input end of the first beam splitter being used for accessing the light without carrying data, and an output end of the first beam splitter being connected with an input end of at least two MZM modulators, the MZM modulator comprising: a second beam splitter, an input end of the second beam splitter being connected with an output end of the first beam splitter; a first interference arm, an input end of the first interference arm being connected with a first output end of the second beam splitter; a second interference arm, an input end of the second interference arm being connected with a second output end of the second beam splitter; a combiner, a first input end of the combiner being connected with an output end of the first interference arm, and a second input end of the combiner being connected with an output end of the second interference arm; a third beam splitter, an input end of the third beam splitter being connected with an output end of the combiner; a fourth beam splitter, an input end of the fourth beam splitter being connected with a first output end of the third beam splitter; a fifth beam splitter, an input end of the fifth beam splitter being connected with a second output end of the third beam splitter, a first photodetector, the first photodetector being connected with a first output end of the fourth beam splitter, for monitoring optical power of output light; the first photodetector being connected with the MCU, so that the MCU reads a first photodetector signal triggered by the first monitoring light by the first photodetector, and calculates the optical power of the output light according to the first photodetector signal; a second photodetector, the second photodetector being connected with a first output end of the fifth beam splitter, for monitoring optical power of auxiliary light; the output light and the auxiliary light having the same amplitude and opposite phase; the MZM modulator further comprising an optical phase shifter, the optical phase shifter being arranged on the interference arm, and the optical phase shifter being further connected with the MCU, so that the MCU adds a sinusoidal disturbance on the current power of the optical phase shifter, and adjusts the power output to the optical phase shifter according to the integral value of the product of the power of the optical phase shifter after adding the sinusoidal disturbance and the optical power of the output light; and / or, the MCU being configured to receive the optical power of the output light and the optical power of the auxiliary light, calculate a sum value of the optical power of the output light and the optical power of the auxiliary light, output an emission abnormal signal when the sum value is less than a minimum threshold value or the sum value is greater than a maximum threshold value, and output a second control signal to close the silicon light algorithm.

2. The optical module according to claim 1, wherein the MCU judging whether the integral value is equal to 0, if the integral value is equal to 0, the power output to the optical phase shifter does not need to be adjusted; if the integral value is not equal to 0, judging whether the integral value is greater than 0, if the integral value is greater than 0, reducing the power output to the optical phase shifter until the integral value is equal to 0; if the integral value is less than 0, increasing the power output to the optical phase shifter until the integral value is equal to 0.

3. The optical module according to claim 1, wherein the MCU calculating the voltage or current of the optical phase shifter according to the power of the optical phase shifter, and outputting the voltage or the current to the optical phase shifter.

4. The optical module according to claim 1, wherein the optical phase shifter being arranged on the first interference arm or the second interference arm.

5. The optical module according to claim 1, wherein The light phase shifter comprises a first light phase shifter and a second light phase shifter, the first light phase shifter is arranged on the first interference arm, and the second light phase shifter is arranged on the second interference arm.

6. The optical module of claim 1, wherein, The MZM modulator further comprises a first modulation electrode and a second modulation electrode, the first modulation electrode is arranged on the first interference arm, and the second modulation electrode is arranged on the second interference arm.

7. The optical module of claim 1, wherein, The maximum threshold is less than or equal to the optical power of the input end of the first optical splitter. The minimum threshold is greater than or equal to one-eighth of the optical power of the input end of the first optical splitter.

8. The optical module according to claim 1, wherein The MZM modulator further comprises: A heater is arranged on the first interference arm and used for adjusting the phase of light of the first interference arm.

9. The optical module of claim 1, wherein, The MCU is further configured to: When the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, a normal emission signal is outputted; when the data of the light emission control bit is the second preset data, a second control signal is outputted to close the silicon light algorithm operation.

10. The optical module of claim 1, wherein, The MCU is further configured to: When the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, a normal emission signal is outputted; when the data of the light emission control bit is the first preset data, a first control signal is outputted to start the silicon light algorithm operation.

11. The optical module of claim 1, wherein, The MCU comprises: A first register connected with the upper computer, the first register is used for the value of the light emission control bit; A second register used for storing the minimum threshold and the maximum threshold; A third register used for storing the state data of the light emission signal; A first operator connected with the first register, the second register and the third register; the first operator is configured to: calculate the sum of the optical power of the output light and the optical power of the auxiliary light, when the sum is less than the minimum threshold or greater than the maximum threshold, write the abnormal state data into the third register, and output a second control signal to a second operator to close the silicon light algorithm.

12. The optical module according to claim 11, wherein, The first operator is configured to: when the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, write the normal state data into the third register; obtain the value of the light emission control bit, and when the value of the light emission control bit is the first preset data, output a first control signal to the second operator to make the second operator start the operation of the silicon light algorithm.

13. The optical module of claim 1, wherein, The proportion of the light split by the fourth optical splitter to the first photodetector is the same as the proportion of the light split by the fifth optical splitter to the second photodetector.

14. A method for monitoring the light emission state of an optical modulation chip, comprising: obtaining the optical power of the monitoring light and the optical power of the output light; calculating the sum of the optical power of the monitoring light and the optical power of the output light; when the sum is greater than the maximum threshold or the sum is less than the minimum threshold, output an abnormal emission signal and a second control signal to close the silicon light algorithm.

15. The method for monitoring the light emission state of the optical modulation chip according to claim 14, comprising: when the sum is greater than or equal to the minimum threshold and the sum is less than or equal to the maximum threshold, output a normal emission signal. Data of the light-emitting control bit is acquired, and when the light-emitting control bit is the second preset data, a second control signal is output to turn off the silicon light algorithm operation. When the sum is greater than or equal to the minimum threshold value and less than or equal to the maximum threshold value, a normal emission signal is output; data of the light-emitting control bit is acquired, and when the light-emitting control bit is the first preset data, a first control signal is output to start the silicon light algorithm operation.

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