Optical module

Abstract

The invention discloses an optical module. An MCU is configured to control a third power supply chip to determine a second bias current according to a first instruction value of a first instruction signal; controlling a first power supply chip to adjust a first bias current according to a first instruction value of the second instruction signal so as to enable the emergent light power to be within a first preset range; controlling the second power supply chip to adjust the bias voltage according to the first instruction value of the third instruction signal so as to enable the extinction ratio to be within a third preset range; controlling the first power supply chip to adjust the first bias current according to a second instruction value of the second instruction signal so as to enable the emergent light power to be within a second preset range; and controlling the second power supply chip to adjust the bias voltage according to a second instruction value of the third instruction signal, so that the extinction ratio is within a fourth preset range. In the invention, the second bias current is kept unchanged, and the first bias current and the bias voltage are coarsely adjusted and then finely adjusted, so that the emergent light power and the extinction ratio both meet the eye diagram index of the optical module.

Description

Technical Field

[0001] The present application relates to the technical field of optical communication networks, and in particular to an optical module. Background Art

[0002] With the development of new services and application models such as cloud computing, mobile Internet, and video, the advancement of optical communication technology has become increasingly important. In optical communication technology, optical modules, as one of the key components in optical communication equipment, can realize the conversion of optical and electrical signals. In the development of optical communication technology, the data transmission rate of optical modules is required to be continuously improved.

[0003] The optical module includes a laser, and common lasers include a distributed feedback laser (DFB) and an electro-absorption modulated laser (EML). Among them, the EML laser is an integrated device of an electro-absorption modulator (EAM) and a DFB laser.

[0004] In order to ensure that the signal quality of the optical signal transmitted by the EML meets the requirements of the communication protocol, it is necessary to control the EML to have a good eye diagram quality. Summary of the invention

[0005] The present application provides an optical module with good eye diagram quality.

[0006] An optical module, comprising:

[0007] A laser chip, including a light emitting area, a modulation area and an amplification area;

[0008] A first power chip, connected to the light-emitting area, and used to provide a first bias current for the light-emitting area;

[0009] A second power chip is connected to the modulation area and is used to provide a bias voltage for the modulation area;

[0010] A third power chip is connected to the amplifying area and is used to provide a second bias current for the amplifying area;

[0011] The MCU is connected to the first power chip, the second power chip and the third power chip respectively, and is configured as follows:

[0012] Controlling the third power chip to determine a second bias current according to the first instruction value of the first instruction signal;

[0013] Controlling the first power chip to adjust the first bias current according to the first instruction value of the second instruction signal so that the output optical power is within a first preset range;

[0014] Controlling the second power chip to adjust the bias voltage according to the first instruction value of the third instruction signal so that the extinction ratio is within a third preset range;

[0015] Controlling the first power chip to adjust the first bias current according to the second command value of the second command signal so that the output optical power is within a second preset range;

[0016] The second power chip is controlled to adjust the bias voltage according to the second instruction value of the third instruction signal so that the extinction ratio is within a fourth preset range.

[0017] Beneficial effects: The present application provides an optical module, including a laser chip, a first power chip, a second power chip, a third power chip and an MCU. The laser chip includes a light-emitting area, a modulation area and an amplification area. The light-emitting area is used to emit light that does not carry data, the modulation area is used to electrically absorb and modulate the light that does not carry data to obtain data light, and the amplification area is used to amplify the data light. The first power chip is connected to the light-emitting area and the MCU, respectively, and is used to provide a first bias current for the light-emitting area. The second power chip is connected to the modulation area and the MCU, respectively, and is used to provide a bias voltage for the modulation area. The third power chip is connected to the amplification area and the MCU, respectively, and is used to provide a second bias current for the amplification area. The second bias current has a greater impact on the output optical power than the first bias current and the bias voltage. If the first bias current or the bias voltage is determined first and then the second bias current is adjusted, the test result may be inaccurate. Therefore, the second bias current is determined first, and the first bias current and the bias voltage are debugged separately while keeping the second bias current unchanged. Since the first bias current has a greater influence on the output optical power than the bias voltage, the first bias current is roughly adjusted first and then the bias voltage is roughly adjusted when the second bias current is determined. That is, the MCU is configured to: control the third power chip to determine the second bias current according to the first instruction value of the first instruction signal; control the first power chip to adjust the first bias current according to the first instruction value of the second instruction signal, so that the output optical power is within the first preset range; control the second power chip to adjust the bias voltage according to the first instruction value of the third instruction signal, so that the extinction ratio is within the third preset range. However, coarse adjustment of the bias voltage may cause the output optical power to exceed the first preset range. Therefore, it is necessary to finely adjust the first bias current after coarse adjustment of the bias voltage, so that the output optical power returns to the first preset range. That is, the MCU is configured to: control the first power chip to adjust the first bias current according to the second instruction value of the second instruction signal, so that the output optical power is within the second preset range. Among them, the second preset range is within the first preset range. The output optical power is within the second preset range. Even if the bias voltage is adjusted more finely, the output optical power exceeds the second preset range, but it is impossible to exceed the first preset range, so that the output optical power of the optical module meets the eye diagram index. However, fine-tuning the first bias current may cause the extinction ratio to exceed the third preset range. Therefore, it is necessary to fine-tune the bias voltage after fine-tuning the first bias current. That is, the MCU is configured to: control the second power chip to adjust the bias voltage according to the second instruction value of the third instruction signal so that the extinction ratio is within the fourth preset range. Among them, the fourth preset range is within the third preset range. The extinction ratio is within the fourth preset range. Even if the first bias current is adjusted again, the extinction ratio exceeds the fourth preset range, but it is impossible to exceed the third preset range, so that the extinction ratio of the optical module meets the eye diagram index.In the present application, the second bias current is determined, and the first bias current and bias voltage are coarsely adjusted while the second bias current remains unchanged, and then the first bias current and bias voltage are finely adjusted so that the output optical power and the extinction ratio both meet the eye diagram indicators of the optical module, thereby making the optical module have better eye diagram quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A structural diagram of an optical module testing system provided according to some embodiments;

[0020] Figure 2 A structural diagram of an optical module provided according to some embodiments;

[0021] Figure 3 is an exploded view of an optical module provided according to some embodiments;

[0022] Figure 4 A structural diagram of an optical module with a housing removed according to some embodiments;

[0023] Figure 5 Another structural diagram of an optical module with a housing removed according to some embodiments;

[0024] Figure 6 An assembly diagram of a laser chip, a power chip, and an MCU provided according to some embodiments;

[0025] Figure 7 A structural diagram of an MCU provided according to some embodiments;

[0026] Figure 8 A process of a debugging method provided according to some embodiments Figure 1 ;

[0027] Fig. 9 A process of a debugging method provided according to some embodiments Figure 2 ;

[0028] Fig.10 A process of a debugging method provided according to some embodiments Figure 3 . DETAILED DESCRIPTION

[0029] Figure 1FIG. 1 is a structural diagram of an optical module testing system provided according to some embodiments. Figure 1 As shown, in some embodiments, the optical module testing system includes a testing board 100 , an optical module 200 disposed on the testing board 100 , a bit error tester 700 , an oscilloscope 800 , and a testing host 900 .

[0030] The test board 100 is provided with a hot-plug connector. The optical module 200 is inserted into the hot-plug connector to facilitate performance testing of the optical module 200.

[0031] A high-speed signal connector is provided on the test board 100. The bit error detector 700 is connected to the high-speed signal connector via a high-frequency electrical connection line to provide a high-frequency electrical signal to the test system.

[0032] The oscilloscope 800 is connected to the optical module via an optical fiber at one end and to the test host 900 at the other end, and is used to test the eye diagram performance of the optical module transmitter. The display page of the oscilloscope 800 displays the output optical power, extinction ratio and template margin. The output optical power is the average optical power.

[0033] A connection socket is provided on the test board 100. The test host 900 is connected to the connection socket through a wire to control the optical module to complete the performance test. The test host 900 is also connected to the oscilloscope 800 to obtain various index parameters of the eye diagram, such as the output optical power, extinction ratio and template margin.

[0034] After the bit error detector 700 sends a high-frequency electrical signal to the optical module 200, the test host 900 writes the first instruction value of the first instruction signal to the optical module 200. The optical module 200 determines the second bias current according to the first instruction value of the first instruction signal. The test host 900 writes the first instruction value of the second instruction signal to the optical module 200. The optical module adjusts the first bias current according to the first instruction value of the second instruction signal so that the output optical power is within the first preset range. When the test host 900 reads that the output optical power is within the first preset range, the test host 900 writes the first instruction value of the third instruction signal to the optical module 200. The optical module adjusts the bias voltage according to the first instruction value of the third instruction signal so that the extinction ratio is within the third preset range. When the test host 900 reads that the extinction ratio is within the third preset range, the test host 900 writes the second indication value of the second instruction signal to the optical module 200. The optical module 200 adjusts the first bias current again according to the second indication value of the second instruction signal so that the output optical power is within the second preset range. When the test host 900 reads that the output optical power is within the second preset range, the test host 900 writes the second indication value of the third instruction signal to the optical module 200. The optical module 200 adjusts the bias voltage again according to the second indication value of the third instruction signal so that the extinction ratio is within the fourth preset range. When the test host 900 reads that the template margin is greater than the preset value, the test host 900 writes the fourth instruction signal to the optical module 200. According to the fourth instruction signal, the optical module 200 stores the first indication value of the first instruction signal, the second indication value of the second instruction signal, and the second indication value of the third instruction signal. When the test host 900 reads that the template margin is less than the preset value, the test host 900 does not write the fourth instruction signal to the optical module 200, but writes the second instruction value of the first instruction signal or the third instruction value of the first instruction signal to the optical module 200. According to the second instruction value of the first instruction signal or the third instruction value of the first instruction signal, the optical module 200 first adjusts the second bias current, and then readjusts the first bias current and the bias voltage so that the template margin of the eye diagram is greater than the preset value.

[0035] Figure 2 The present invention is a structural diagram of an optical module provided according to some embodiments. Figure 3 FIG. 1 is an exploded view of an optical module provided according to some embodiments. Figure 2 and Figure 3 As shown, the optical module 200 includes a shell, a circuit board 300 disposed in the shell, a light emitting component 400 and a light receiving component 500. However, the present disclosure is not limited thereto. In some embodiments, the optical module 200 includes one of the light emitting component 400 and the light receiving component 500.

[0036] The housing comprises an upper housing 201 and a lower housing 202 . The upper housing 201 covers the lower housing 202 to form the housing having two openings 204 and 205 . The outer contour of the housing is generally a square body.

[0037] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 located on both sides of the bottom plate 2021 and arranged perpendicular to the bottom plate 2021; the upper shell 201 includes a cover plate 2011, and the cover plate 2011 covers the two lower side plates 2022 of the lower shell 202 to form the above-mentioned shell.

[0038] In some embodiments, the lower shell 202 includes a bottom plate 2021 and two lower side plates 2022 located on both sides of the bottom plate 2021 and vertically arranged with the bottom plate 2021; the upper shell 201 includes a cover plate 2011 and two upper side plates located on both sides of the cover plate 2011 and vertically arranged with the cover plate 2011, and the two upper side plates are combined with the two lower side plates 2022 to realize that the upper shell 201 covers the lower shell 202.

[0039] The direction of the line connecting the two openings 204 and 205 may be consistent with the length direction of the optical module 200, or may 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 ( Figure 3 The opening 205 is also located at the end of the optical module 200 ( Figure 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 interface, and the gold finger of the circuit board 300 extends from the electrical interface and is inserted into the electrical connector of the test host; the opening 205 is an optical port, which is configured to access the optical fiber 101 so that the optical fiber 101 is connected to the optical emitting component 400 and / or the optical receiving component 500 in the optical module 200.

[0040] The assembly method of combining the upper shell 201 and the lower shell 202 is adopted, which facilitates the installation of components such as the circuit board 300, the light emitting component 400, and the light receiving component 500 into the above-mentioned shell, and the upper shell 201 and the lower shell 202 can encapsulate and protect the shapes of these components. In addition, when assembling components such as the circuit board 300, the light emitting component 400 and the light receiving component 500, it is convenient to deploy the positioning components, heat dissipation components, and electromagnetic shielding components of these devices, which is conducive to the automated implementation of production.

[0041] In some embodiments, the upper shell 201 and the lower shell 202 are made of metal materials to facilitate electromagnetic shielding and heat dissipation.

[0042] In some embodiments, the optical module 200 further includes an unlocking component 600 located outside its housing. The unlocking component 600 is configured to achieve a fixed connection between the optical module 200 and the test host, or to release the fixed connection between the optical module 200 and the test host.

[0043] For example, the unlocking component 600 is located on the outside of the two lower side plates 2022 of the lower housing 202, and includes a snap-fit ​​component that matches the cage 106 of the test host. When the optical module 200 is inserted into the cage 106, the snap-fit ​​component of the unlocking component 600 fixes the optical module 200 in the cage 106; when the unlocking component 600 is pulled, the snap-fit ​​component of the unlocking component 600 moves accordingly, thereby changing the connection relationship between the snap-fit ​​component and the test host, so as to release the snap-fit ​​fixed connection between the optical module 200 and the test host, so that the optical module 200 can be pulled out of the cage 106.

[0044] The circuit board 300 includes circuit traces, electronic components and chips, etc. The electronic components and chips are connected together according to the circuit design through the circuit traces to realize the functions of power supply, electrical signal transmission and grounding. The electronic components may include capacitors, resistors, triodes, metal-oxide-semiconductor field-effect transistors (MOSFET), etc. The chips may include microcontroller units (MCU), laser driver chips, transimpedance amplifiers (TIA), limiting amplifiers, clock and data recovery chips (CDR), power management chips, and digital signal processing (DSP) chips.

[0045] The circuit board 300 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also realize the load-bearing function. For example, the rigid circuit board can stably carry the above-mentioned electronic components and chips; the rigid circuit board is also easy to insert into the electrical connector in the test host cage.

[0046] The circuit board 300 also includes a gold finger formed on the end surface thereof, and the gold finger is composed of a plurality of independent pins. The circuit board 300 is inserted into the cage 106, and the gold finger is connected to the electrical connector in the cage 106. The gold finger can be provided on the surface of only one side of the circuit board 300 (for example, Figure 4The gold finger is configured to establish an electrical connection with the test host to achieve power supply, grounding, I2C signal transmission, data signal transmission, etc.

[0047] Of course, flexible circuit boards are also used in some optical modules. Flexible circuit boards are generally used in conjunction with rigid circuit boards to supplement rigid circuit boards.

[0048] The light emitting component 400 and / or the light receiving component 500 are located on a side of the circuit board 300 away from the gold finger; in some embodiments, the light emitting component 400 and the light receiving component 500 are physically separated from the circuit board 300, and then electrically connected to the circuit board 300 through corresponding flexible circuit boards or electrical connectors; in some embodiments, the light emitting component and / or the light receiving component can be directly set on the circuit board 300, can be set on the surface of the circuit board, and can also be set on the side of the circuit board.

[0049] Figure 4 A structural diagram of an optical module with a housing removed according to some embodiments. Figure 5 Another structural diagram of an optical module with a housing removed according to some embodiments. Figure 6 FIG. 1 is an assembly diagram of a laser chip, a power chip, and an MCU according to some embodiments. Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the light emitting component 400 includes a laser chip, which includes only a light emitting area, which emits light that does not carry data under the action of a first bias current and modulates the light that does not carry data into data light under the action of a modulation current.

[0050] In some embodiments, the light emitting component 400 includes a laser chip, the laser chip includes a light emitting area and a modulation area, the light emitting area emits light that does not carry data under the action of a first bias current, and the modulation area electrically absorbs and modulates the light that does not carry data under the action of a bias voltage and a modulation signal to obtain data light, wherein the modulation signal is a modulation voltage.

[0051] In some embodiments, the light emitting component 400 includes a laser chip, which includes a light emitting area (LD), a modulation area (EA) and an amplification area (SOA). The light emitting area emits light that does not carry data under the action of a first bias current, the modulation area electrically absorbs and modulates the light that does not carry data under the action of a bias voltage and a modulation signal to obtain data light, and the amplification area amplifies the data light under the action of a second bias current.

[0052] The international standard ITU-T G.9804.3 for 50G GPON was released in September 2021. In order to maintain the current PON link budget of 29dB / 32dB, the 50G PON standard puts forward higher requirements on the output optical power of the OLT optical module. The current conventional 53GBaud EML cannot meet the output optical power requirements of 50G PON. Therefore, a laser chip including the light emitting area, the modulation area and the amplification area is selected, such as Figure 6 As shown, the requirements of output optical power can be met.

[0053] like Figure 4 and Figure 5 As shown, in some embodiments, an MCU 301 , a first power chip 302 , a second power chip 303 and a third power chip 304 are disposed on the circuit board 300 of the optical module, and the MCU 301 is connected to the first power chip 302 , the second power chip 303 and the third power chip 304 , respectively.

[0054] In some embodiments, the first power chip 302 is only connected to the light-emitting area, and is used to provide only the first bias current to the light-emitting area, so that the light-emitting area emits light that does not carry data.

[0055] The first power chip 302 only provides the first bias current for the light emitting area. In order to provide a modulation signal for the modulation area, in some embodiments, the optical module further includes a driver chip. The driver chip is respectively connected to the MCU 301 and the modulation area to provide a modulation signal for the modulation area.

[0056] In some embodiments, the first power chip 302 is not only connected to the light-emitting area, but also connected to the modulation area. The power chip is not only used to provide the first bias current for the light-emitting area, but also used to provide a modulation signal for the modulation area. For example, the first power chip 302 is an integrated chip, which provides the first bias current and the bias voltage.

[0057] In some embodiments, the second power chip 303 is connected to the modulation area to provide a bias voltage for the modulation area, so that the modulation area electrically absorbs and modulates light that does not carry data to obtain data light under the action of the modulation voltage and the bias voltage.

[0058] In some embodiments, the third power chip 304 is connected to the amplifying region to provide a second bias current to the amplifying region so that the amplifying region amplifies the data light.

[0059] The second bias current has a greater impact on the output optical power than the first bias current and bias voltage. If the first bias current or bias voltage is determined first and then the second bias current is adjusted, the test result may be inaccurate. Therefore, the second bias current is determined first, and the first bias current and bias voltage are adjusted separately while keeping the second bias current unchanged. Since the first bias current has a greater impact on the output optical power than the bias voltage, the first bias current is roughly adjusted first and then the bias voltage is roughly adjusted after the second bias current is determined. However, the rough adjustment of the bias voltage may cause the output optical power to exceed the first preset range. Therefore, it is necessary to finely adjust the first bias current after the rough adjustment of the bias voltage to return the output optical power to the first preset range. However, fine adjustment of the first bias current may cause the extinction ratio to exceed the third preset range. Therefore, it is necessary to finely adjust the bias voltage after the fine adjustment of the first bias current. That is, MCU301 is configured to: control the third power supply chip to determine the second bias current according to the first instruction value of the first instruction signal; control the first power supply chip to adjust the first bias current according to the first instruction value of the second instruction signal, so that the output optical power is within the first preset range; control the second power supply chip to adjust the bias voltage according to the first instruction value of the third instruction signal, so that the extinction ratio is within the third preset range; control the first power supply chip to adjust the first bias current according to the second instruction value of the second instruction signal, so that the output optical power is within the second preset range; control the second power supply chip to adjust the bias voltage according to the second instruction value of the third instruction signal, so that the extinction ratio is within the fourth preset range.

[0060] The second preset range is within the first preset range, and the output optical power is within the second preset range. Even if the bias voltage is further adjusted, the output optical power exceeds the second preset range, but it is impossible to exceed the first preset range, so that the output optical power of the optical module meets the eye diagram indicator.

[0061] The fourth preset range is within the third preset range, and the extinction ratio is within the fourth preset range. Even if the first bias current is adjusted again and the extinction ratio exceeds the fourth preset range, it is impossible to exceed the third preset range, so that the extinction ratio of the optical module meets the eye diagram indicator.

[0062] In some embodiments, the second bias current is determined, and the first bias current and bias voltage are coarsely adjusted while the second bias current remains unchanged, and then the first bias current and bias voltage are finely adjusted so that the output optical power and the extinction ratio both meet the eye diagram indicators of the optical module, thereby making the optical module have better eye diagram quality.

[0063] Since the eye diagram indicators of the optical module include not only the output optical power and extinction ratio, but also the template margin. If the template margin is greater than the preset value, the template margin meets the eye diagram indicators; if the template margin is less than the preset value, the template margin does not meet the eye diagram indicators.

[0064] If the template margin of the optical module is greater than the preset value, the first instruction value of the first instruction signal, the second instruction value of the second instruction signal, and the second instruction value of the third instruction signal are stored. That is, the MCU is configured to store the first instruction value of the first instruction signal, the second instruction value of the second instruction signal, and the second instruction value of the third instruction signal according to the fourth instruction signal.

[0065] If the template margin of the optical module is less than the preset value, that is, the fourth instruction signal is not received, the third power chip is controlled to adjust the second bias current according to the second instruction value of the first instruction signal, and the first bias current and bias voltage are readjusted so that the output optical power, extinction ratio and template margin all meet the eye diagram requirements. For example, MCU301 is also configured to: control the third power chip to adjust the second bias current according to the second instruction value of the first instruction signal; control the first power chip to adjust the first bias current according to the third instruction value of the second instruction signal, so that the output optical power is within the first preset range; control the second power chip to adjust the bias voltage according to the third instruction value of the third instruction signal, so that the extinction ratio is within the third preset range; control the first power chip to adjust the first bias current according to the fourth instruction value of the second instruction signal, so that the output optical power is within the second preset range; control the second power chip to adjust the bias voltage according to the fourth instruction value of the third instruction signal, so that the extinction ratio is within the fourth preset range; store the second instruction value of the first instruction signal, the third instruction value of the second instruction signal and the fourth instruction value of the third instruction signal according to the fourth instruction signal.

[0066] If the template margin of the optical module is still less than the preset value (i.e., after adjusting the second bias current according to the second instruction value of the first instruction signal and adjusting the first bias current and the bias voltage, the fourth instruction signal is still not received), the third power supply chip is controlled to adjust the second bias current according to the third instruction value of the first instruction signal, and the first bias current and the bias voltage are readjusted so that the output optical power, extinction ratio and template margin all meet the eye diagram requirements. By way of example, MCU301 is also configured to: control the third power supply chip to adjust the second bias current according to the third instruction value of the first instruction signal; control the first power supply chip to adjust the first bias current according to the fifth instruction value of the second instruction signal, so that the output optical power is within the first preset range; control the second power supply chip to adjust the bias voltage according to the fifth instruction value of the third instruction signal, so that the extinction ratio is within the third preset range; control the first power supply chip to adjust the first bias current according to the sixth instruction value of the second instruction signal, so that the output optical power is within the second preset range; control the second power supply chip to adjust the bias voltage according to the sixth instruction value of the third instruction signal, so that the extinction ratio is within the fourth preset range; and store the third instruction value of the first instruction signal, the fifth instruction value of the second instruction signal, and the sixth instruction value of the third instruction signal according to the fourth instruction signal.

[0067] Among them, the second bias current corresponding to the first instruction value of the first instruction signal, the second bias current corresponding to the second instruction value of the first instruction signal, and the second bias current corresponding to the third instruction value of the first instruction signal are not different in size, but the second bias current corresponding to the first instruction value of the first instruction signal can better meet the needs of most optical modules than the other two second bias currents. The second bias current corresponding to the second instruction value of the first instruction signal can meet the needs of most of the remaining optical modules relative to the second bias current corresponding to the third instruction value of the first instruction signal. A command signal has only one command value at a time, and there is no such thing as a command signal having two command values ​​at a time.

[0068] Figure 7 FIG. 1 is a structural diagram of an MCU provided according to some embodiments. Figure 7 As shown, in some embodiments, MCU301 includes a first register, a second register, a third register and a fourth register, the first register is used to store the first instruction signal, the second register is used to store the second instruction signal, the third register is used to store the third instruction signal, and the fourth register is used to store the fourth instruction signal.

[0069] MCU301 is also configured to: read and send the first instruction value of the first instruction signal to the third power supply chip to determine the second bias current; read and send the first instruction value of the second instruction signal to the first power supply chip to adjust the first bias current, so that the light output optical power is within the first preset range; read and send the first instruction value of the third instruction signal to the second power supply chip to adjust the bias voltage, so that the extinction ratio is within the third preset range; read and send the second instruction value of the second instruction signal to the first power supply chip to adjust the first bias current, so that the light output optical power is within the second preset range; read and send the second instruction value of the third instruction signal to the second power supply chip to adjust the bias voltage, so that the extinction ratio is within the fourth preset range; read the fourth instruction signal, and store the first instruction value of the first instruction signal, the second instruction value of the second instruction signal, and the second instruction value of the third instruction signal.

[0070] In some embodiments, a fifth register is set in the first power chip, a sixth register is set in the second power chip, and a seventh register is set in the third power chip. The fifth register is used to store the second instruction signal, the sixth register is used to store the third instruction signal, and the seventh register is used to store the first instruction signal.

[0071] MCU301 is also configured to: read and write the first instruction value of the first instruction signal into the seventh register to determine the second bias current; read and write the first instruction value of the second instruction signal into the fifth register to adjust the first bias current so that the output optical power is within the first preset range; read and write the first instruction value of the third instruction signal into the sixth register to adjust the bias voltage so that the extinction ratio is within the third preset range; read and write the second instruction value of the second instruction signal into the fifth register to adjust the first bias current so that the output optical power is within the second preset range; read and write the second instruction value of the third instruction signal into the sixth register to adjust the bias voltage so that the extinction ratio is within the fourth preset range; read the fourth instruction signal, and store the first instruction value of the first instruction signal, the second instruction value of the second instruction signal, and the second instruction value of the third instruction signal.

[0072] like Figure 4 and Figure 5 As shown, in some embodiments, a digital-to-analog converter 305 is also provided in the optical module. The digital-to-analog converter 305 is provided on the circuit board 300. The digital-to-analog converter 305 is respectively connected to the MCU, the first power chip, the second power chip and the third power chip for converting digital quantities into analog quantities.

[0073] In some embodiments, the digital-to-analog converter is integrated in the MCU 301 , and the digital-to-analog converter is connected to the first power chip, the second power chip, and the third power chip respectively.

[0074] In addition to providing an optical module, the present application also provides a debugging method. Figure 8 A process of a debugging method provided according to some embodiments Figure 1 .like Figure 8 As shown, in some embodiments, the debugging method includes:

[0075] S100: Controlling a third power chip to determine a second bias current according to a first instruction value of a first instruction signal.

[0076] The second bias current has a greater impact on the output optical power than the first bias current and bias voltage. If the first bias current or bias voltage is determined first and then the second bias current is adjusted, the test result may be inaccurate. Therefore, the second bias current is determined first, and the first bias current and bias voltage are adjusted separately while keeping the second bias current unchanged.

[0077] The first command signal is used to represent the second bias current.

[0078] The test host writes the first instruction value of the first instruction signal into the first register of the MCU. The MCU reads the first instruction value of the first instruction signal and writes the first instruction value of the first instruction signal into the seventh register of the third power chip. The third power chip determines the magnitude of the output second bias current according to the first instruction value of the first instruction signal.

[0079] S200: Controlling the first power chip to adjust the first bias current according to the first instruction value of the second instruction signal so that the output optical power is within a first preset range.

[0080] Since the first bias current has a greater influence on the output optical power than the bias voltage, the first bias current is roughly adjusted first and then the bias voltage is roughly adjusted when the second bias current is determined.

[0081] The second command signal is used to represent the first bias current.

[0082] The test host writes the first instruction value of the second instruction signal into the second register of the MCU. The MCU reads the first instruction value of the second instruction signal and writes the first instruction value of the second instruction signal into the fifth register of the first power chip. The first power chip adjusts the magnitude of the output first bias current according to the first instruction value of the second instruction signal so that the output optical power is within the first preset range.

[0083] S300: Controlling the second power chip to adjust the bias voltage according to the first instruction value of the third instruction signal so that the extinction ratio is within a third preset range.

[0084] The third command signal is used to represent the bias voltage.

[0085] When the test host reads that the output optical power of the oscilloscope is within the first preset range, the first instruction value of the third instruction signal is written into the third register of the MCU. The MCU reads the first instruction value of the third instruction signal and writes the first instruction value of the third instruction signal into the sixth register of the second power chip. The first power chip adjusts the magnitude of the output bias voltage according to the first instruction value of the third instruction signal so that the extinction ratio is within the third preset range.

[0086] S400: Controlling the first power chip to adjust the first bias current according to the second instruction value of the second instruction signal, so that the output optical power is within a second preset range.

[0087] Roughly adjusting the bias voltage may cause the output optical power to exceed the first preset range. Therefore, it is necessary to finely adjust the first bias current after the bias voltage is roughly adjusted to return the output optical power to the first preset range.

[0088] When the test host reads that the extinction ratio of the oscilloscope is within the third preset range, the second instruction value of the second instruction signal is written into the second register of the MCU. The MCU reads the second instruction value of the second instruction signal and writes the second instruction value of the second instruction signal into the fifth register of the first power chip. The first power chip adjusts the magnitude of the output first bias current according to the second instruction value of the second instruction signal so that the output optical power is within the second preset range.

[0089] S500: Controlling the second power chip to adjust the bias voltage according to the second instruction value of the third instruction signal so that the extinction ratio is within a fourth preset range.

[0090] Fine-tuning the first bias current may cause the extinction ratio to exceed the third preset range. Therefore, the bias voltage needs to be fine-tuned after fine-tuning the first bias current.

[0091] When the test host reads that the output optical power of the oscilloscope is within the second preset range, the second instruction value of the third instruction signal is written into the third register of the MCU. The MCU reads the second instruction value of the third instruction signal and writes the second instruction value of the third instruction signal into the sixth register of the second power chip. The first power chip adjusts the output bias voltage according to the second instruction value of the third instruction signal so that the extinction ratio is within the fourth preset range.

[0092] S600: Determine whether the optical module stores a fourth instruction signal.

[0093] When the test host reads that the extinction ratio of the oscilloscope is within the third preset range and the template margin is greater than the preset value, the fourth instruction signal is written into the fourth register of the MCU. When the MCU reads the fourth instruction signal, it indicates that the output optical power, extinction ratio and template margin all meet the eye diagram indicators.

[0094] When the test host reads that the extinction ratio of the oscilloscope is within the third preset range and the template margin is less than the preset value, the fourth instruction signal is not written into the fourth register of the MCU, but the second instruction value of the first instruction signal is written into the first register. The MCU does not read the fourth instruction signal, which means that although the output optical power and extinction ratio meet the eye diagram indicators, the template margin does not meet the eye diagram indicators. Because the template margin is related to the first bias current, the second bias current and the bias voltage, the first bias current, the second bias current and the bias voltage are readjusted.

[0095] S700: If the optical module stores the fourth command signal, store the first command value of the first command signal, the second command value of the second command signal, and the second command value of the third command signal.

[0096] S800: If the optical module does not store the fourth instruction signal, control the third power chip to adjust the second bias current according to the second instruction value of the first instruction signal, and readjust the first bias current and the bias voltage so that the template margin is greater than the preset value.

[0097] Fig. 9 A process of a debugging method provided according to some embodiments Figure 2 .like Fig. 9 As shown, in some embodiments, if the template margin of the optical module is less than a preset value, that is, as in S800, the debugging method includes:

[0098] S801: Controlling a third power chip to adjust a second bias current according to a second instruction value of a first instruction signal.

[0099] S802: Control the first power chip to adjust the first bias current according to the third instruction value of the second instruction signal, so that the output optical power is within a first preset range.

[0100] S803: Control the second power chip to adjust the bias voltage according to the third instruction value of the third instruction signal, so that the extinction ratio is within a third preset range.

[0101] S804: Control the first power chip to adjust the first bias current according to the fourth instruction value of the second instruction signal, so that the output optical power is within a second preset range.

[0102] S805: Control the second power chip to adjust the bias voltage according to the fourth instruction value of the third instruction signal, so that the extinction ratio is within a fourth preset range.

[0103] S806: Determine whether the optical module stores a fourth instruction signal.

[0104] S807: If the optical module stores the fourth command signal, store the second command value of the first command signal, the fourth command value of the second command signal, and the fourth command value of the third command signal.

[0105] S808: If the optical module does not store the fourth instruction signal, control the third power chip to adjust the second bias current, and readjust the first bias current and the bias voltage so that the template margin is greater than a preset value.

[0106] Fig.10 A process of a debugging method provided according to some embodiments Figure 3 .like Fig.10 As shown, in some embodiments, if the template margin of the optical module is less than a preset value, that is, as S808, the debugging method includes:

[0107] S881: Control the third power chip to adjust the second bias current according to the third instruction value of the first instruction signal.

[0108] S882: Control the first power chip to adjust the first bias current according to the fifth instruction value of the second instruction signal so that the output optical power is within a first preset range.

[0109] S883: Control the second power chip to adjust the bias voltage according to the fifth instruction value of the third instruction signal so that the extinction ratio is within a third preset range.

[0110] S884: Control the first power chip to adjust the first bias current according to the sixth command value of the second command signal so that the output optical power is within a second preset range.

[0111] S885: Control the second power chip to adjust the bias voltage according to the sixth instruction value of the third instruction signal so that the extinction ratio is within a fourth preset range.

[0112] S886: Determine whether the optical module stores the fourth instruction signal.

[0113] S887: If the optical module stores the fourth command signal, store the third command value of the first command signal, the sixth command value of the second command signal, and the sixth command value of the third command signal. If the optical module does not store the fourth command signal, end.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical module, characterized in that: include: A laser chip, including a light emitting area, a modulation area and an amplification area; A first power chip, connected to the light-emitting area, and used to provide a first bias current for the light-emitting area; A second power chip, connected to the modulation area, for providing a bias voltage for the modulation area; a third power chip, connected to the amplifying area, and used to provide a second bias current for the amplifying area; The MCU is connected to the first power chip, the second power chip and the third power chip respectively, and is configured as follows: Controlling the third power chip to determine a second bias current according to a first instruction value of the first instruction signal; Controlling the first power chip to adjust the first bias current according to the first instruction value of the second instruction signal so that the output optical power is within a first preset range; Controlling the second power chip to adjust the bias voltage according to the first instruction value of the third instruction signal so that the extinction ratio is within a third preset range; Controlling the first power chip to adjust the first bias current according to the second command value of the second command signal so that the output optical power is within a second preset range; The second power chip is controlled to adjust the bias voltage according to the second instruction value of the third instruction signal so that the extinction ratio is within a fourth preset range.

2. The optical module according to claim 1, characterized in that: The MCU is also configured to: storing a first instruction value of the first instruction signal, a second instruction value of the second instruction signal, and a second instruction value of the third instruction signal according to a fourth instruction signal, wherein the fourth instruction signal is used to characterize that a template margin of an eye diagram is greater than a preset value; When the fourth instruction signal is not received, the third power chip is controlled to adjust the second bias current according to the second instruction value of the first instruction signal, and the first bias current and the bias voltage are readjusted.

3. The optical module according to claim 1, characterized in that: The second preset range is within the first preset range, and the fourth preset range is within the third preset range.

4. The optical module according to claim 2, characterized in that: The MCU is also configured to: Controlling the third power chip to adjust the second bias current according to the second instruction value of the first instruction signal; Controlling the first power chip to adjust the first bias current according to the third instruction value of the second instruction signal so that the output optical power is within a first preset range; Controlling the second power chip to adjust the bias voltage according to a third instruction value of the third instruction signal so that the extinction ratio is within a third preset range; Controlling the first power chip to adjust the first bias current according to a fourth instruction value of the second instruction signal so that the output optical power is within a second preset range; controlling the second power chip to adjust the bias voltage according to a fourth instruction value of the third instruction signal so that the extinction ratio is within a fourth preset range; A second instruction value of the first instruction signal, a third instruction value of the second instruction signal, and a fourth instruction value of the third instruction signal are stored according to a fourth instruction signal.

5. The optical module according to claim 4, characterized in that: The MCU is also configured to: Controlling the third power chip to adjust the second bias current according to a third instruction value of the first instruction signal; Controlling the first power chip to adjust the first bias current according to the fifth instruction value of the second instruction signal so that the output optical power is within a first preset range; Controlling the second power chip to adjust the bias voltage according to a fifth instruction value of the third instruction signal so that the extinction ratio is within a third preset range; Controlling the first power chip to adjust the first bias current according to a sixth instruction value of the second instruction signal so that the output optical power is within a second preset range; controlling the second power chip to adjust the bias voltage according to a sixth instruction value of the third instruction signal so that the extinction ratio is within a fourth preset range; The third instruction value of the first instruction signal, the sixth instruction value of the second instruction signal, and the sixth instruction value of the third instruction signal are stored according to the fourth instruction signal.

6. The optical module according to claim 1, characterized in that: The MCU is provided with a plurality of registers; wherein the first register is used to store a first instruction signal, the second register is used to store a second instruction signal, the third register is used to store a third instruction signal, and the fourth register is used to store a fourth instruction signal; The MCU is also configured to: reading and sending a first instruction value of the first instruction signal to a third power chip to determine a second bias current; Reading and sending a first instruction value of the second instruction signal to a first power chip to adjust a first bias current so that the output optical power is within a first preset range; Reading and sending the first instruction value of the third instruction signal to the second power chip to adjust the bias voltage so that the extinction ratio is within a third preset range; Reading and sending a second instruction value of the second instruction signal to the first power chip to adjust the first bias current so that the output optical power is within a second preset range; reading and sending a second instruction value of the third instruction signal to the second power chip to adjust the bias voltage so that the extinction ratio is within a fourth preset range; The fourth command signal is read, and a first command value of the first command signal, a second command value of the second command signal, and a second command value of the third command signal are stored.

7. The optical module according to claim 1, characterized in that: Also included is a digital-to-analog converter; The digital-to-analog converter is connected to the MCU, the first power chip, the second power chip and the third power chip respectively.

8. The optical module according to claim 1, characterized in that: Also includes driver chip; The driving chip is connected to the MCU and the modulation area respectively, and is used to provide a modulation signal for the modulation area.

9. The optical module according to claim 1, characterized in that: The first power chip is provided with a fifth register, the second power chip is provided with a sixth register, and the third power chip is provided with a seventh register; The MCU is configured as: reading and writing a first instruction value of the first instruction signal into a seventh register to determine a second bias current; Reading and writing the first instruction value of the second instruction signal into the fifth register to adjust the first bias current so that the output optical power is within a first preset range; Reading and writing a first instruction value of the third instruction signal into a sixth register to adjust the bias voltage so that the extinction ratio is within a third preset range; Reading and writing a second instruction value of the second instruction signal into a fifth register to adjust the first bias current so that the output optical power is within a second preset range; Reading and writing a second instruction value of the third instruction signal into a sixth register to adjust the bias voltage so that the extinction ratio is within a fourth preset range; The fourth command signal is read, and the first command value of the first command signal, the second command value of the second command signal, and the second command value of the third command signal are stored.

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