Dual-channel and miniaturized optical module driving circuit and dual-channel optical module

Abstract

The invention discloses a dual-channel and miniaturized optical module driving circuit and a dual-channel optical module, and relates to the technical field of optical modules.The dual-channel optical module comprises a first channel and a second channel; each of the first channel and the second channel comprises a laser diode, a limiting amplifier, an electro-absorption modulated laser and an avalanche photodiode; the optical module driving circuit comprises an interface unit, a control unit and a driving unit. The interface unit is connected with the control unit, and the control unit is connected with the driving unit; and the driving unit is respectively connected with the laser diodes, the limiting amplifiers, the electro-absorption modulated lasers and the avalanche photodiodes of the first channel and the second channel. According to the dual-channel parallel processing mechanism, synchronous receiving and transmitting of bidirectional data are achieved through an independent signal path, and the bandwidth limitation of a traditional single-channel architecture is broken through. Meanwhile, due to the centralized control of the two channels, the integration level is remarkably improved, and the overall size of the equipment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical modules, and particularly to a dual-channel and miniaturized optical module driving circuit. Background Art

[0002] With the rapid development of optical fiber communication technology, XGSPON (10G Symmetric Passive Optical Network) technology has become the mainstream solution in the field of optical fiber access networks due to its high bandwidth and bidirectional symmetric transmission characteristics.

[0003] As the core component of the XGSPON system, the OLT (Optical Line Terminal) optical module undertakes key functions such as optoelectronic signal conversion, data scheduling, and transmission control. Its performance directly determines the network transmission efficiency, signal quality, and system reliability.

[0004] However, the traditional XGSPON_OLT optical module design generally adopts a single-channel architecture, which gradually exposes the following technical bottlenecks in practical applications: the bandwidth capacity of a single transmission channel is limited, making it difficult to meet the urgent needs of high-concurrency and large-flow data transmission on the user side, resulting in limited overall throughput of the system; secondly, the existing module circuit design has low integration, leading to a large device volume. The above problems seriously restrict the large-scale application of XGSPON technology in high-speed access scenarios, and it is urgent to achieve breakthroughs through architecture innovation and integrated design. Summary of the Invention

[0005] An embodiment of the present invention proposes a dual-channel and miniaturized optical module driving circuit, aiming to solve at least one of the technical problems in the above background art.

[0006] To solve the above problems, in a first aspect, an embodiment of the present invention proposes a dual-channel and miniaturized optical module driving circuit, which is applied to a dual-channel optical module. The dual-channel optical module includes a first channel and a second channel. Both the first channel and the second channel include a laser diode, a limiting amplifier, an electro-absorption modulated laser, and an avalanche photodiode;

[0007] The optical module driving circuit includes an interface unit, a control unit, and a driving unit; the interface unit is connected to the control unit, and the control unit is connected to the driving unit; the driving unit is respectively connected to the laser diode, the limiting amplifier, the electro-absorption modulated laser, and the avalanche photodiode of the first channel and the second channel.

[0008] A further technical solution thereof is that the interface unit includes a communication interface, a first-channel signal interface, and a second-channel signal interface, and the

[0009] communication interface, the first-channel signal interface, and the second-channel signal interface are all connected to the control unit.

[0010] A further technical solution thereof is that the driving unit includes a first driving subunit, and the first driving subunit is connected to the control unit, the laser diode of the first channel, and the limiting amplifier.

[0011] A further technical solution thereof is that the driving unit includes a second driving subunit, and the second driving subunit is connected to the control unit, the laser diode of the second channel, and the limiting amplifier.

[0012] A further technical solution thereof is that the driving unit includes a third driving subunit, and the third driving subunit is connected to the control unit and the electro-absorption modulator laser of the first channel.

[0013] A further technical solution thereof is that the driving unit includes a fourth driving subunit, and the fourth driving subunit is connected to the control unit and the electro-absorption modulator laser of the second channel.

[0014] A further technical solution thereof is that the driving unit includes a fifth driving subunit, and the fifth driving subunit is connected to the control unit, and the avalanche photodiodes of the first channel and the second channel.

[0015] A further technical solution thereof is that the dual-channel optical module further includes a thermoelectric cooler, and the fifth driving subunit is connected to the thermoelectric cooler.

[0016] A further technical solution thereof is that a connection unit is further included, and the driving unit is connected to the laser diodes, limiting amplifiers, electro-absorption modulator lasers, and avalanche photodiodes of the first channel and the second channel through the connection unit.

[0017] In a second aspect, an embodiment of the present invention provides a dual-channel optical module, which includes the dual-channel and miniaturized optical module driving circuit as described in the first aspect.

[0018] Compared with the prior art, the technical effects that can be achieved by the embodiments of the present invention include:

[0019] The present invention provides a dual-channel and miniaturized optical module driving circuit, which is applied to a dual-channel optical module. The dual-channel optical module includes a first channel and a second channel. Both the first channel and the second channel include a laser diode, a limiting amplifier, an electro-absorption modulated laser, and an avalanche photodiode. The optical module driving circuit includes an interface unit, a control unit, and a driving unit. The interface unit is connected to the control unit, and the control unit is connected to the driving unit. The driving unit is respectively connected to the laser diode, the limiting amplifier, the electro-absorption modulated laser, and the avalanche photodiode of the first channel and the second channel. The dual-channel parallel processing mechanism of the present invention realizes the synchronous transceiver of bidirectional data through independent signal paths, breaking through the bandwidth limitation of the traditional single-channel architecture. At the same time, the centralized control of the dual channels significantly improves the integration degree and reduces the overall volume of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] One or more embodiments are exemplarily illustrated by the pictures in the corresponding accompanying drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, unless otherwise stated, and the drawings in the drawings do not constitute a proportional limitation.

[0023] Figure 1 It is a structural block diagram of a dual-channel and miniaturized optical module driving circuit proposed by an embodiment of the present invention;

[0024] Figure 2 It is a circuit block diagram of a dual-channel and miniaturized optical module driving circuit proposed by an embodiment of the present invention;

[0025] Figure 3 It is another structural block diagram of a dual-channel and miniaturized optical module driving circuit proposed by an embodiment of the present invention.

[0026] Reference numeral

[0027] The first channel 10, the second channel 20, the laser diode 30, the limiting amplifier 40, the electro-absorption modulated laser 50, the avalanche photodiode 60, the thermoelectric cooler 70, the interface unit 100, the control unit 200, the drive unit 300, the connection unit 400, the first drive subunit 310, the second drive subunit 320, the third drive subunit 330, the fourth drive subunit 340, and the fifth drive subunit 350. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Similar component numbers in the drawings represent similar components. Obviously, the embodiments to be described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0030] It should also be understood that the terms used in the specification of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the specification of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms.

[0031] See Figures 1 - 3 , an embodiment of the present invention provides a dual-channel and miniaturized optical module drive circuit, which is applied to a dual-channel optical module. The dual-channel optical module includes a first channel 10 and a second channel 20. Both the first channel 10 and the second channel 20 include a laser diode 30, a limiting amplifier 40, an electro-absorption modulated laser 50, and an avalanche photodiode 60. Specifically, both the first channel 10 and the second channel 20 include a transmit optical subassembly (TOSA) and a receive optical subassembly (ROSA). Among them, the laser diode 30 (LDD) and the electro-absorption modulated laser 50 (EML) belong to the components of the transmit optical subassembly; the limiting amplifier 40 (LA) and the avalanche photodiode 60 (APD) belong to the components of the receive optical subassembly.

[0032] Specifically, the optical module driving circuit includes an interface unit 100, a control unit 200, and a driving unit 300; the interface unit 100 is connected to the control unit 200, and the control unit 200 is connected to the driving unit 300; the driving unit 300 is respectively connected to the laser diodes 30, limiting amplifiers 40, electro-absorption modulated lasers 50, and avalanche photodiodes 60 of the first channel 10 and the second channel 20.

[0033] In the embodiment of the present invention, the dual-channel architecture realizes the bidirectional symmetric data transmission capability by independently setting the laser diodes 30, limiting amplifiers 40, electro-absorption modulated lasers 50 (EML), and avalanche photodiodes 60 (APD) of the first channel 10 and the second channel 20, significantly improving the bandwidth capacity and signal processing efficiency of the optical module. The hierarchical connection architecture of the interface unit 100, the control unit 200, and the driving unit 300 centrally integrates power supply, signal transmission, and control logic, reducing the number of discrete components, thereby optimizing the module volume and power consumption. The independent driving control of each channel device by the driving unit 300 can avoid signal crosstalk and enhance the system reliability through redundant design. In addition, the dual-channel parallel processing mechanism can adapt to high-density network deployment scenarios and meet the stringent requirements of fiber access networks for high speed and low latency.

[0034] Specifically, the control unit 200 can be specifically an MCU chip, and the control unit 200 communicates with the interface unit 100 and the driving unit 300 through the I2C bus.

[0035] The present invention proposes a dual-channel and miniaturized optical module driving circuit, which is applied to a dual-channel optical module. The dual-channel optical module includes a first channel 10 and a second channel 20. Both the first channel 10 and the second channel 20 include a laser diode 30, a limiting amplifier 40, an electro-absorption modulated laser 50, and an avalanche photodiode 60; the optical module driving circuit includes an interface unit 100, a control unit 200, and a driving unit 300; the interface unit 100 is connected to the control unit 200, and the control unit 200 is connected to the driving unit 300; the driving unit 300 is respectively connected to the laser diodes 30, limiting amplifiers 40, electro-absorption modulated lasers 50, and avalanche photodiodes 60 of the first channel 10 and the second channel 20. The dual-channel parallel processing mechanism of the present invention realizes the synchronous transceiver of bidirectional data through independent signal paths, breaking through the bandwidth limitation of the traditional single-channel architecture. At the same time, the centralized control of the dual channels significantly improves the integration level and reduces the overall volume of the device.

[0036] Furthermore, in some preferred embodiments, the interface unit 100 includes a communication interface, a first channel 10 signal interface, and a second channel 20 signal interface, and the communication interface, the first channel 10 signal interface, and the second channel 20 signal interface are all connected to the control unit 200.

[0037] In specific implementation, the interface unit 100 realizes the physical isolation transmission of control instructions and dual-channel data streams by separately setting a communication interface, a first channel 10 signal interface, and a second channel 20 signal interface. The communication interface is responsible for the configuration interaction between the external device and the control unit 200, while the independent channel signal interfaces respectively carry the transceiver signals of the first channel 10 and the second channel 20, avoiding resource competition of multiple signals on a single interface. This design not only reduces the complexity of the signal transmission path but also optimizes the signal integrity through dedicated channels, reducing the impact of electromagnetic interference on the high-speed data link, thereby improving the overall transmission stability. At the same time, the modular layout of the interface unit 100 provides a compatibility basis for subsequent function expansion.

[0038] Specifically, the interface unit 100 can be specifically a gold finger interface circuit that meets SFPDD, which is used to provide high-speed data transmission and power supply and supports dual-channel signal transmission. SFPDD is a high-speed interface standard in the optical module field, with the full name of Small Form-factor Pluggable Dual Density (small form-factor pluggable dual-density interface). Its core design goal is to achieve high-density and high-rate data transmission and power supply through a compact package and a dual-channel architecture. In the present invention, in the technical solution, the gold finger interface circuit integrates the control signals, power supply, and high-speed data link of the dual-channel XGSPON_OLT, becoming a key technical carrier for realizing the miniaturization and high integration of the optical module.

[0039] Specifically, the communication interface can be specifically an I2C interface. The first channel 10 signal interface includes the TX / RX signal pins and control signal pins of the first channel 10; the second channel 20 signal interface includes the TX / RX signal pins and control signal pins of the second channel 20.

[0040] Furthermore, in some preferred embodiments, the driving unit 300 includes a first driving subunit 310 and a second driving subunit 320, and the first driving subunit 310 is connected to the control unit 200, the laser diode 30 of the first channel 10, and the limiting amplifier 40.

[0041] The second driving subunit 320 is connected to the control unit 200, the laser diode 30 of the second channel 20, and the limiting amplifier 40.

[0042] In specific implementation, the first driving subunit 310 and the second driving subunit 320 independently control the laser diodes 30 (LDD) and the limiting amplifiers 40 (LA) of the first channel 10 and the second channel 20 respectively, ensuring precise regulation of the transmitting and receiving functions of each channel. The LDD driving circuit optimizes the stability of the optical signal output power by dynamically adjusting the working current of the laser; the LA driving circuit adjusts the gain and suppresses the noise of the received signal to improve the signal-to-noise ratio. The physical isolation design of the dual driving subunits further reduces the coupling interference between channels and ensures the signal independence in the parallel transmission scenario. In addition, the channel-by-channel driving strategy can flexibly allocate resources according to different load requirements to achieve optimal energy efficiency.

[0043] Specifically, both the first driving subunit 310 and the second driving subunit 320 can be driving chips, such as LD driving chips. The LD driving chip is the core integrated circuit in the optical module for driving and controlling the laser diode 30 (Laser Diode, LD). Its core function is to provide precise current regulation and working state management for the laser. Specifically, through the output of a high-precision current source, the chip ensures that the laser diode 30 emits light stably at the preset working point. At the same time, it integrates overcurrent protection, temperature compensation, and a modulation signal input interface to adapt to the high-speed optical communication scenario. In the embodiment of the present invention, the LD driving chip independently drives the laser diodes 30 of the first channel 10 and the second channel 20, receives the modulation signal sent by the control unit 200 through the differential signal input port, and converts it into a driving current to control the light emission intensity and modulation waveform of the laser. In addition, the built-in feedback loop of the chip can monitor the working current and temperature of the laser in real time, and avoid device overload or performance drift by dynamically adjusting the output parameters, ultimately achieving high stability and low bit error rate of the optical signal transmission. This design not only improves the transmission efficiency of the optical module, but also reduces the risk of signal crosstalk through channel-by-channel independent control, providing a hardware guarantee for the reliable operation of the dual-channel architecture.

[0044] Furthermore, in some preferred embodiments, the driving unit 300 includes a third driving subunit 330 and a fourth driving subunit 340. The third driving subunit 330 is connected to the control unit 200 and the electro-absorption modulated laser 50 of the first channel 10.

[0045] The fourth driving subunit 340 is connected to the control unit 200 and the electro-absorption modulated laser 50 of the second channel 20.

[0046] In specific implementation, the third driving subunit 330 and the fourth driving subunit 340 are respectively dedicated to driving the electro-absorption modulated lasers 50 (EMLs) of the first channel 10 and the second channel 20. By independently regulating the EA current and the SOA current, precise matching of the modulation depth of the optical signal and the amplifier gain for each channel is achieved. The high-frequency response characteristics of the EML driving circuit can adapt to the high-speed modulation requirements, ensure the fidelity of the signal waveform, and avoid timing conflicts caused by sharing driving resources among multiple channels. The channel-separated driving design also allows dynamic adjustment of the modulation parameters according to the link state. For example, when transmitting over a long distance, the SOA gain is enhanced to compensate for optical losses, thereby improving the adaptability of the system to different application scenarios.

[0047] Specifically, the third driving subunit 330 and the fourth driving subunit 340 can specifically be EML driving chips. An EML driving chip is an integrated circuit specifically used to control electro-absorption modulated lasers 50 (Electro-Absorption Modulated Laser, EML). Its core function is to achieve high-speed modulation and precise control of optical signals. The chip converts electrical signals into high-linearity optical modulation signals by adjusting the bias current of the electro-absorption modulator (EA) and the gain current of the semiconductor optical amplifier (SOA), and at the same time integrates a monitoring circuit to provide real-time feedback on the modulation depth and optical power status. In the dual-channel optical module of the present invention, the EML driving chips independently drive the electro-absorption modulated lasers 50 of the first channel 10 and the second channel 20, and receive configuration instructions from the MCU through the I2C control channel to dynamically adjust the EA current to match the transmission requirements at different rates and distances. For example, in a high-speed modulation scenario, the chip reduces signal distortion by optimizing the driving waveform to ensure the eye diagram quality; while in long-distance transmission, the SOA current is increased to compensate for optical link losses and maintain the signal strength. In addition, the built-in MPD (monitoring photodiode) current detection function of the chip can calibrate the output power in real time to avoid performance degradation caused by device aging or temperature fluctuations. This highly integrated driving design not only simplifies the circuit layout but also achieves parallel modulation of dual-channel signals through channel-separated independent control, significantly improving the transmission efficiency and reliability of the optical module.

[0048] Further, in some preferred embodiments, the driving unit 300 includes a fifth driving subunit 350, and the fifth driving subunit 350 is connected to the control unit 200 and the avalanche photodiodes 60 of the first channel 10 and the second channel 20.

[0049] In specific implementation, the fifth driving subunit 350 centrally controls the dual-channel avalanche photodiodes 60 (APDs). By uniformly adjusting the APD bias voltage and gain parameters, the consistency of the signal detection sensitivity at the receiving end is ensured. The high-voltage output stability of the APD driving circuit can suppress dark current noise and enhance the weak light signal detection ability, especially suitable for low optical power or long-distance transmission scenarios. The centralized driving design reduces the repetitive circuit layout, lowers the module complexity and power consumption. At the same time, through the shared control logic, the real-time synchronous monitoring of the dual-channel APD status is realized, which is convenient for quick diagnosis and fault isolation, and improves the system maintenance efficiency.

[0050] Further, in some preferred embodiments, the dual-channel optical module further includes a thermoelectric cooler 70, and the fifth driving subunit 350 is connected to the thermoelectric cooler 70.

[0051] In specific implementation, the connection between the fifth driving subunit 350 and the thermoelectric cooler 70 (TEC) deeply integrates the APD driving and temperature control functions. The TEC driving circuit maintains the stability of the APD operating temperature by dynamically adjusting the cooling current, avoiding gain fluctuations or increased noise caused by temperature drift. In addition, the TEC can be extended to the temperature control of lasers (such as EMLs) to ensure the consistency of the emission wavelength. The coordinated management of temperature control and APD driving not only improves the signal quality at the receiving end, but also extends the device life by suppressing the heat accumulation effect, thereby enhancing the long-term operation reliability of the optical module in a high-temperature environment.

[0052] Specifically, the number of the thermoelectric coolers 70 is 2, which are respectively arranged in the first channel 10 and the second channel 20.

[0053] The dual-channel optical module includes two thermoelectric coolers 70, which are respectively arranged in the first channel 10 and the second channel 20. The fifth driving subunit 350 is connected to the two thermoelectric coolers 70 and independently controls their working states in different channels.

[0054] Specifically, the fifth driving subunit 350 is a functional unit in the optical module for coordinating the control of the thermoelectric cooler 70 (TEC) and the avalanche photodiode 60 (APD). Its specific implementation includes the following core parts:

[0055] TEC driving module:

[0056] Function implementation: Through the output of a high-precision current source, the direction and magnitude of the current flowing through the thermoelectric cooler 70 are dynamically adjusted to realize the control of the module temperature rise / fall. For example, when the MCU detects that the TOSA temperature exceeds the standard, an instruction is sent through the I2C interface, and the driving circuit adjusts the current input of the thermoelectric cooler 70 in the first channel 10 or the first channel 10, so as to quickly stabilize the device operating temperature.

[0057] Circuit composition: Integrated H-bridge drive chip, supporting bidirectional current output; The temperature feedback loop collects the data of the thermistor in real time through the ADC to form a closed-loop control.

[0058] APD drive module:

[0059] Function implementation: Provide a high-voltage bias for the avalanche photodiode 60, and adjust the operating point of the avalanche photodiode 60 through the gain control circuit to adapt to different optical signal intensities. For example, under weak light conditions, the drive circuit increases the bias voltage to enhance the avalanche gain of the avalanche photodiode 60, thereby improving the reception sensitivity.

[0060] Circuit composition: It includes a DC-DC boost chip that converts the low-voltage input into the high voltage (typical value 40 - 60V) required by the avalanche photodiode 60; Integrated current limiting protection and noise filtering circuits to ensure the stability of the high-voltage output.

[0061] Cooperative control mechanism:

[0062] Temperature-sensitivity linkage: The TEC drive module maintains a low-temperature working environment for the APD to reduce the influence of thermal noise on the received signal; At the same time, the APD drive module dynamically adjusts the bias voltage according to the temperature feedback to compensate for the gain change caused by temperature drift.

[0063] Independent channel control: Separate the TEC current input and APD voltage input of the dual channels through a 32PIN interface (such as J1 / J2) to ensure the independence of the temperature control and reception enhancement functions of each channel and avoid cross-interference.

[0064] The fifth drive subunit 350 realizes miniaturization through an integrated design. At the same time, the separate-channel control logic meets the high-density deployment requirements of the dual-channel optical module. Finally, the fifth drive subunit 350 significantly improves the reception sensitivity and long-term reliability of the optical module while ensuring temperature stability.

[0065] Furthermore, in some preferred embodiments, it further includes a connection unit 400. The drive unit 300 is connected to the laser diodes 30, limiting amplifiers 40, electro-absorption modulator lasers 50, and avalanche photodiodes 60 of the first channel 10 and the second channel 20 through the connection unit 400.

[0066] In specific implementation, the connection unit 400 serves as the physical medium between the driving unit 300 and the optical device, and realizes the rapid docking of the internal circuit of the module and the optical transmitting / receiving sub-assembly through standardized interface definitions (such as TOSA 16PIN, ROSA 15PIN). Its high-density wiring design shortens the signal transmission path, reduces the influence of parasitic capacitance and inductance on high-frequency signals, thereby improving signal integrity. The plug-and-play structure of the connection unit 400 also simplifies the replacement and maintenance processes of the optical device, reducing the operation and maintenance costs. In addition, its shielding design and impedance matching characteristics can effectively suppress external electromagnetic interference, ensuring the stability of dual-channel high-speed data transmission.

[0067] Specifically, the connection unit 400 can be a connector, and realizes the physical docking of the TOSA / ROSA optical device and the driving circuit through a connector (such as a board-to-board connector). Its plug-and-play design supports rapid replacement and maintenance. For example, PIN3 (TX_DISABLE1) of the TOSA interface is directly connected to the disable control signal of the driving unit 300, which can quickly cut off the laser output in case of a fault, improving the system security. Finally, through the collaborative design of independent wiring for each channel, electromagnetic compatibility optimization, and thermal management, this circuit provides a hardware basis for the stable operation of the dual-channel optical module.

[0068] The technical effects of the present invention at least include:

[0069] The dual-channel and miniaturized optical module driving circuit provided by the present invention effectively solves the technical bottlenecks in the integration degree and transmission efficiency of traditional optical modules through innovative architecture design. Specifically, the driving circuit adopts a dual-channel independent architecture. Both the first channel 10 and the second channel 20 include core functional units such as a laser diode 30 (LDD), a limiting amplifier 40 (LA), an electro-absorption modulated laser 50 (EML), and an avalanche photodiode 60 (APD). Combined with the hierarchical collaborative design of the interface unit 100, the control unit 200, and the driving unit 300, the overall performance of the optical module is improved.

[0070] In terms of optimizing the integration degree, the interface unit 100 integrates the external device interaction, power supply, and high-speed data transmission functions into a single physical layer through the integration of standardized communication interfaces and dual-channel signal interfaces, significantly reducing the number of discrete components used. As the core scheduling center, the control unit 200 realizes two-way communication with the interface unit 100 and the driving unit 300 through the I2C bus, dynamically coordinating the transmission and reception logics of the two channels. The driving unit 300 is further divided into multiple groups of independent sub-units, which accurately drive the LDD, LA, EML, and APD of each channel respectively. This modular design not only simplifies the circuit layout but also greatly compresses the physical size of the optical module through the high integration of functional units, enabling it to adapt to the miniaturized packaging requirements of high-density network devices.

[0071] In terms of improving transmission efficiency, the dual-channel parallel processing mechanism realizes the synchronous transceiver of bidirectional data through independent signal paths, breaking through the bandwidth limitation of the traditional single-channel architecture. The first driving subunit 310 and the second driving subunit 320 separately provided in the driving unit 300 can perform dynamic current regulation according to the characteristics of each channel laser to ensure the stability of the optical signal modulation depth and output power; the third driving subunit 330 and the fourth driving subunit 340 suppress the noise interference in the receiving link through adaptive gain adjustment and improve the signal-to-noise ratio. In addition, the fifth driving subunit 350 optimizes the avalanche gain consistency in a weak light environment through centralized high-voltage bias control, further enhancing the receiving sensitivity. The physical isolation design of the dual channels effectively reduces the risk of signal crosstalk. Combined with the real-time status monitoring function of the control unit 200, it can maintain a stable data transmission rate and low bit error rate under complex working conditions.

[0072] Furthermore, the driving circuit solves the heat dissipation problem in high-load scenarios through the collaborative temperature control design of the thermoelectric cooler 70 (TEC) and the APD. The control unit 200 dynamically adjusts the TEC driving current based on real-time temperature feedback to ensure the stable operating temperature of the laser and the receiving device, avoiding wavelength shift or gain fluctuation caused by thermal drift. At the same time, the high-density connector design and impedance matching optimization of the interface unit 100 shorten the signal transmission path and reduce the influence of parasitic parameters on the integrity of high-frequency signals. Through multi-dimensional innovations in the hardware architecture and control strategy, the overall solution significantly improves the transmission reliability, environmental adaptability, and long-term operation stability of the optical module while achieving miniaturization, providing key technical support for the large-scale deployment of high-speed fiber access networks.

[0073] An embodiment of the present invention provides a dual-channel optical module, and the dual-channel optical module includes the dual-channel and miniaturized optical module driving circuit as described in any one of the above embodiments.

[0074] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0075] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0077] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0079] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0080] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

[0081] As described above, the specific implementation manners of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A dual-channel and miniaturized optical module driving circuit, characterized in that, Applied to a dual-channel optical module, the dual-channel optical module includes a first channel and a second channel, and both the first channel and the second channel include a laser diode, a limiting amplifier, an electro-absorption modulated laser, and an avalanche photodiode; The optical module driving circuit includes an interface unit, a control unit, and a driving unit; the interface unit is connected to the control unit, and the control unit is connected to the driving unit; the driving unit is respectively connected to the laser diode, the limiting amplifier, the electro-absorption modulated laser, and the avalanche photodiode of the first channel and the second channel.

2. The dual-channel and miniaturized optical module driving circuit according to claim 1, wherein The interface unit includes a communication interface, a first-channel signal interface, and a second-channel signal interface, and the communication interface, the first-channel signal interface, and the second-channel signal interface are all connected to the control unit.

3. The dual-channel and miniaturized optical module driving circuit according to claim 1, characterized in that The driving unit includes a first driving subunit, and the first driving subunit is connected to the control unit, the laser diode, and the limiting amplifier of the first channel.

4. The dual-channel and miniaturized optical module driving circuit according to claim 1, wherein The driving unit includes a second driving subunit, and the second driving subunit is connected to the control unit, the laser diode, and the limiting amplifier of the second channel.

5. The dual-channel and miniaturized optical module driving circuit according to claim 1, wherein The driving unit includes a third driving subunit, and the third driving subunit is connected to the control unit and the electro-absorption modulated laser of the first channel.

6. The dual-channel and miniaturized optical module driving circuit according to claim 1, characterized in that, The driving unit includes a fourth driving subunit, and the fourth driving subunit is connected to the control unit and the electro-absorption modulated laser of the second channel.

7. The dual-channel and miniaturized optical module driving circuit according to claim 1, characterized in that The driving unit includes a fifth driving subunit, and the fifth driving subunit is connected to the control unit, the avalanche photodiodes of the first channel and the second channel.

8. The dual-channel and miniaturized optical module driving circuit according to claim 7, wherein The dual-channel optical module further includes a thermoelectric cooler, and the fifth driving subunit is connected to the thermoelectric cooler.

9. The dual-channel and miniaturized optical module driving circuit according to claim 1, wherein It further includes a connection unit, and the driving unit is connected to the laser diode, the limiting amplifier, the electro-absorption modulated laser, and the avalanche photodiode of the first channel and the second channel through the connection unit.

10. A dual-channel optical module, characterized in that, It includes a dual-channel and miniaturized optical module driving circuit according to any one of claims 1-9.

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