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

Abstract

The application discloses a kind of double-channel and miniaturized optical module drive circuit and double-channel optical module, it is related to optical module technical field, double-channel optical module includes first channel and second channel, the first channel and the second channel all include laser diode, limiting amplifier, electroabsorption modulated laser and avalanche photodiode;Optical module drive circuit includes interface unit, control unit and drive unit;Interface unit is connected with the control unit, the control unit is connected with the drive unit;The drive unit is connected with the laser diode, limiting amplifier, electroabsorption modulated laser and avalanche photodiode of the first channel and the second channel respectively.The double-channel parallel processing mechanism of the application is realized by independent signal path The synchronous reception and transmission of two-way data, break through the bandwidth limit of traditional single-channel architecture.At the same time, the centralized control of double-channel, significantly improve the integration, reduce the volume of equipment as a whole.

Description

Technical Field

[0001] This invention relates to the field of optical module technology, and in particular to a dual-channel and miniaturized optical module driving circuit. Background Technology

[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 network due to its high bandwidth and bidirectional symmetrical transmission characteristics.

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

[0004] However, traditional XGSPON_OLT optical module designs generally adopt a single-channel architecture, which has gradually revealed 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 users for high-concurrency, high-volume data transmission, resulting in limited overall system throughput; secondly, the low integration of existing module circuit designs leads to large device size. These problems severely restrict the large-scale application of XGSPON technology in high-speed access scenarios, and breakthroughs are urgently needed through architectural innovation and integrated design. Summary of the Invention

[0005] This invention provides a dual-channel and miniaturized optical module driving circuit, aiming to solve at least one of the technical problems mentioned in the background art.

[0006] To address the aforementioned issues, in a first aspect, embodiments of the present invention propose a dual-channel and miniaturized optical module driving circuit, applied to a dual-channel optical module. The dual-channel optical module includes a first channel and a second channel, both of which 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 connected to the laser diode, limiting amplifier, electro-absorption modulated laser, and avalanche photodiode of the first channel and the second channel, respectively.

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

[0009] The 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 is that the driving unit includes a first driving subunit, which is connected to the control unit, the laser diode of the first channel, and the limiting amplifier.

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

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

[0013] A further technical solution is that the driving unit includes a fourth driving subunit, which is connected to the control unit and the electroabsorption modulated laser of the second channel.

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

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

[0016] A further technical solution includes a connection unit, through which the driving unit is connected to the laser diode, limiting amplifier, electro-absorption modulated laser, and avalanche photodiode of the first channel and the second channel.

[0017] Secondly, embodiments of the present invention provide a dual-channel optical module, which includes a dual-channel and miniaturized optical module driving circuit as described in the first aspect.

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

[0019] This invention proposes a dual-channel and miniaturized optical module driving circuit for use in dual-channel optical modules. The dual-channel optical module includes a first channel and a second channel, each comprising 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 connected to the laser diode, limiting amplifier, electro-absorption modulated laser, and avalanche photodiode of both the first and second channels. The dual-channel parallel processing mechanism of this invention achieves synchronous bidirectional data transmission and reception through independent signal paths, overcoming the bandwidth limitations of traditional single-channel architectures. Simultaneously, the centralized control of the dual channels significantly improves integration and reduces the overall size of the device. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

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

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

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

[0026] Figure Labels

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

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection 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, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

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

[0031] See Figures 1-3 This invention proposes a dual-channel and miniaturized optical module driving circuit for use in 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 light-emitting sub-assembly (TOSA) and a light-receiving sub-assembly (ROSA). The laser diode 30 (LDD) and the electro-absorption modulated laser 50 (EML) are components of the light-emitting sub-assembly; the limiting amplifier 40 (LA) and the avalanche photodiode 60 (APD) are components of the light-receiving sub-assembly.

[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 connected to the laser diode 30, the limiting amplifier 40, the electroabsorption modulated laser 50, and the avalanche photodiode 60 of the first channel 10 and the second channel 20, respectively.

[0033] In this embodiment of the invention, the dual-channel architecture achieves bidirectional symmetrical data transmission capability by independently configuring the laser diode 30, limiting amplifier 40, electro-absorption modulated laser 50 (EML), and avalanche photodiode 60 (APD) in 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, control unit 200, and drive unit 300 centrally integrates power supply, signal transmission, and control logic, reducing the number of discrete components and thus optimizing module size and power consumption. The independent drive control of each channel device by the drive unit 300 avoids signal crosstalk and enhances system reliability through redundant design. Furthermore, the dual-channel parallel processing mechanism is adaptable to high-density network deployment scenarios, meeting the stringent requirements of fiber optic access networks for high speed and low latency.

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

[0035] This invention proposes a dual-channel and miniaturized optical module driving circuit for use in dual-channel optical modules. 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 connected to the laser diode 30, the limiting amplifier 40, the electro-absorption modulated laser 50, and the avalanche photodiode 60 of both the first channel 10 and the second channel 20. The dual-channel parallel processing mechanism of this invention achieves synchronous bidirectional data transmission and reception through independent signal paths, breaking through the bandwidth limitations of traditional single-channel architectures. Simultaneously, the centralized control of the dual channels significantly improves integration and reduces the overall size 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, all of which are connected to the control unit 200.

[0037] In practical implementation, the interface unit 100 achieves physical isolation transmission of control commands and dual-channel data streams by separating the communication interface, the first channel 10 signal interface, and the second channel 20 signal interface. The communication interface is responsible for configuration interaction between external devices and the control unit 200, while the independent channel signal interfaces respectively carry the transmit and receive signals of the first channel 10 and the second channel 20, avoiding resource contention among multiple signals on a single interface. This design not only reduces the complexity of the signal transmission path but also optimizes signal integrity through dedicated channels, reducing the impact of electromagnetic interference on high-speed data links, thereby improving overall transmission stability. Simultaneously, the modular layout of the interface unit 100 provides a compatibility basis for subsequent functional expansion.

[0038] Specifically, the interface unit 100 can be a gold finger interface circuit that meets SFPDD requirements, used to provide high-speed data transmission and power supply, supporting dual-channel signal transmission. SFPDD is a high-speed interface standard in the field of optical modules, short for Small Form-factor Pluggable Dual Density. Its core design goal is to achieve high-density, high-speed data transmission and power supply through compact packaging and a dual-channel architecture. In this 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 technology carrier for realizing the miniaturization and high integration of optical modules.

[0039] Specifically, the communication interface may be an I2C interface, the first channel 10 signal interface includes the TX / RX signal pin and the control signal pin of the first channel 10; the second channel 20 signal interface includes the TX / RX signal pin and the control signal pin 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, wherein the first driving subunit 310 is connected to the control unit 200 and the laser diode 30 and limiting amplifier 40 of the first channel 10.

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

[0042] In practice, the first driving subunit 310 and the second driving subunit 320 independently control the laser diode 30 (LDD) and limiting amplifier 40 (LA) of the first channel 10 and the second channel 20, respectively, ensuring precise control of the transmission and reception functions of each channel. The LDD driving circuit optimizes the stability of the optical signal output power by dynamically adjusting the laser operating current; the LA driving circuit adjusts the gain and suppresses noise of the received signal to improve the signal-to-noise ratio. The physical isolation design of the dual driving subunits further reduces inter-channel coupling interference and ensures signal independence in parallel transmission scenarios. In addition, the channel-specific 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 used to drive and control the laser diode 30 (LD). Its core function is to provide precise current regulation and operating status management for the laser. Specifically, the chip ensures that the laser diode 30 emits light stably at a preset operating point through a high-precision current source output. It also integrates overcurrent protection, temperature compensation, and a modulation signal input interface to adapt to high-speed optical communication scenarios. In this embodiment, the LD driving chip independently drives the laser diodes 30 of the first channel 10 and the second channel 20, respectively. It receives the modulation signal from the control unit 200 through the differential signal input port and converts it into driving current, thereby controlling the laser's emission intensity and modulation waveform. Furthermore, the chip's built-in feedback loop can monitor the laser's operating current and temperature in real time, dynamically adjusting output parameters to avoid device overload or performance drift, ultimately achieving high stability and low bit error rate in optical signal transmission. This design not only improves the transmission efficiency of the optical module, but also reduces the risk of signal crosstalk through independent channel control, providing hardware assurance 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, wherein the third driving subunit 330 is connected to the control unit 200 and the electroabsorption modulated laser 50 of the first channel 10.

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

[0046] In specific implementation, the third driving subunit 330 and the fourth driving subunit 340 are dedicated to driving the electro-absorption modulated laser 50 (EML) of the first channel 10 and the second channel 20, respectively. By independently adjusting the EA current and SOA current, precise matching of the modulation depth of the optical signal and the amplifier gain of each channel is achieved. The high-frequency response characteristics of the EML driving circuit can adapt to high-speed modulation requirements, ensuring signal waveform fidelity while avoiding timing conflicts caused by multiple channels sharing driving resources. The channel-specific driving design also allows for dynamic adjustment of modulation parameters according to the link status, such as enhancing SOA gain to compensate for optical loss during long-distance transmission, thereby improving the system's adaptability to different application scenarios.

[0047] Specifically, the third driving subunit 330 and the fourth driving subunit 340 can be EML driving chips. The EML driving chip is an integrated circuit specifically designed to control the electro-absorption modulated laser (EML) 50, and its core function is to achieve high-speed modulation and precise control of the optical signal. This chip converts the electrical signal into a highly linear optical modulation signal by adjusting the bias current of the electro-absorption modulator (EA) and the gain current of the semiconductor optical amplifier (SOA), while integrating a monitoring circuit to provide real-time feedback on the modulation depth and optical power status. In the dual-channel optical module of this invention, the EML driving chip independently drives the electro-absorption modulated lasers 50 of the first channel 10 and the second channel 20, respectively. It receives configuration commands from the MCU through the I2C control channel and dynamically adjusts the EA current to match the transmission requirements of different rates and distances. For example, in high-speed modulation scenarios, the chip reduces signal distortion by optimizing the driving waveform to ensure eye diagram quality; while in long-distance transmission, it compensates for optical link loss by increasing the SOA current to maintain signal strength. Furthermore, the chip's built-in MPD (Monitoring Photodiode) current detection function can calibrate the output power in real time, avoiding performance degradation caused by device aging or temperature fluctuations. This highly integrated driver design not only simplifies circuit layout but also achieves parallel modulation of dual signals through independent channel control, significantly improving the transmission efficiency and reliability of the optical module.

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

[0049] In practical 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 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 detection capability of weak light signals, making it particularly suitable for low-light power or long-distance transmission scenarios. The centralized driving design reduces redundant circuit layout, lowers module complexity and power consumption, and enables real-time synchronous monitoring of the dual-channel APD status through shared control logic, facilitating rapid diagnosis and fault isolation, and improving system maintenance efficiency.

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

[0051] In practical implementation, the connection between the fifth drive subunit 350 and the thermoelectric cooler 70 (TEC) deeply integrates APD driving and temperature control functions. The TEC drive circuit maintains the stability of the APD operating temperature by dynamically adjusting the cooling current, avoiding gain fluctuations or noise increases caused by temperature drift. Furthermore, the TEC can be extended to 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 receiver but also extends device lifespan by suppressing heat accumulation effects, thereby enhancing the long-term operational reliability of the optical module in high-temperature environments.

[0052] Specifically, there are two thermoelectric coolers 70, which are respectively located in the first channel 10 and the second channel 20.

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

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

[0055] TEC drive module:

[0056] Functionality: By dynamically adjusting the direction and magnitude of the current flowing through the thermoelectric cooler 70 through a high-precision current source output, the module temperature can be controlled to rise or fall. For example, when the MCU detects that the TOSA temperature exceeds the limit, it sends a command through the I2C interface to drive the circuit to adjust the current input of the first channel 10 or the thermoelectric cooler 70 of the first channel 10, thereby quickly stabilizing the device's operating temperature.

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

[0058] APD driver module:

[0059] Functionality: The circuit provides a high-voltage bias to the avalanche photodiode 60 and adjusts its operating point via a gain control circuit to adapt to different light signal intensities. For example, under low-light conditions, the drive circuit increases the bias voltage to enhance the avalanche gain of the avalanche photodiode 60, thereby improving receiver sensitivity.

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

[0061] Collaborative control mechanism:

[0062] Temperature-sensitivity linkage: The TEC driver module maintains the APD in a low-temperature operating environment to reduce the impact of thermal noise on the received signal; at the same time, the APD driver module dynamically adjusts the bias voltage according to temperature feedback to compensate for gain changes caused by temperature drift.

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

[0064] The fifth driver subunit 350 achieves miniaturization through integrated design, while its channel-specific control logic meets the high-density deployment requirements of dual-channel optical modules. Ultimately, the fifth driver subunit 350 significantly improves the receiving sensitivity and long-term reliability of the optical module while ensuring temperature stability.

[0065] Furthermore, in some preferred embodiments, a connection unit 400 is also included, through which the driving unit 300 is connected to the laser diode 30, the limiting amplifier 40, the electroabsorption modulated laser 50, and the avalanche photodiode 60 of the first channel 10 and the second channel 20.

[0066] In practical implementation, the connection unit 400 serves as the physical medium between the drive unit 300 and the optical devices. Through standardized interface definitions (such as TOSA16PIN and ROSA15PIN), it enables rapid docking between the internal circuitry of the module and the optical transmitting / receiving sub-components. Its high-density wiring design shortens the signal transmission path and reduces the impact of parasitic capacitance and inductance on high-frequency signals, thereby improving signal integrity. The pluggable structure of the connection unit 400 also simplifies the replacement and maintenance process of optical devices, reducing operation and maintenance costs. Furthermore, its shielding design and impedance matching characteristics 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, which (such as a board-to-board connector) enables physical connection between the TOSA / ROSA optical device and the driving circuit. Its pluggable design supports quick 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 failure, improving system safety. Finally, this circuit provides a hardware foundation for the stable operation of the dual-channel optical module through independent wiring for each channel, electromagnetic compatibility optimization, and thermal management co-design.

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

[0069] The dual-channel and miniaturized optical module driving circuit provided by this invention effectively solves the technical bottlenecks of traditional optical modules in terms of integration and transmission efficiency 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, a comprehensive improvement in the performance of the optical module is achieved.

[0070] In terms of integration optimization, the interface unit 100 integrates a standardized communication interface with a dual-channel signal interface, concentrating external device interaction, power supply, and high-speed data transmission functions into a single physical layer, significantly reducing the number of discrete components. The control unit 200, as the core scheduling hub, achieves bidirectional communication with the interface unit 100 and the driver unit 300 via an I2C bus, dynamically coordinating the transmission and reception logic of the dual channels. The driver unit 300 is further subdivided into multiple independent sub-units, each precisely driving the LDD, LA, EML, and APD of each channel. This modular design not only simplifies circuit layout but also significantly reduces the physical size of the optical module through the high integration of functional units, enabling it to meet the miniaturized packaging requirements of high-density network equipment.

[0071] In terms of improving transmission efficiency, the dual-channel parallel processing mechanism achieves synchronous bidirectional data transmission and reception through independent signal paths, breaking through the bandwidth limitations of traditional single-channel architectures. The first driving subunit 310 and the second driving subunit 320, separated within the driving unit 300, can dynamically adjust the current according to the characteristics of each channel's laser, ensuring the stability of optical signal modulation depth and output power. The third driving subunit 330 and the fourth driving subunit 340, through adaptive gain adjustment, suppress noise interference in the receiving link and improve the signal-to-noise ratio. Furthermore, the fifth driving subunit 350, through centralized high-voltage bias control, optimizes avalanche gain consistency in low-light environments, further enhancing receiving sensitivity. The physical isolation design of the dual channels effectively reduces the risk of signal crosstalk, and 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 operating conditions.

[0072] Furthermore, the drive circuit solves the heat dissipation problem under high load scenarios through the coordinated temperature control design of the thermoelectric cooler 70 (TEC) and the APD. The control unit 200 dynamically adjusts the TEC drive current based on real-time temperature feedback to ensure stable operating temperatures of the laser and receiving devices, avoiding wavelength shift or gain fluctuations caused by thermal drift. Meanwhile, the high-density connector design and impedance matching optimization of the interface unit 100 shorten the signal transmission path and reduce the impact of parasitic parameters on high-frequency signal integrity. Through multi-dimensional innovation in hardware architecture and control strategies, the overall solution achieves miniaturization while significantly improving the transmission reliability, environmental adaptability, and long-term operational stability of the optical module, providing key technical support for the large-scale deployment of high-speed fiber optic access networks.

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

[0074] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0075] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0076] Furthermore, 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 number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0077] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0080] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims and their equivalents, this invention also intends to include these modifications and variations.

[0081] The above description describes specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dual-channel and miniaturized optical module driving circuit, characterized in that, It is applied to a dual-channel optical module, which 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 connected to the laser diode, limiting amplifier, electro-absorption modulated laser, and avalanche photodiode of the first channel and the second channel, respectively. The interface unit includes a communication interface, a first channel signal interface, and a second channel signal interface. The communication interface, the first channel signal interface, and the second channel signal interface are all connected to the control unit.

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

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

4. The dual-channel and miniaturized optical module driving circuit according to claim 1, characterized in that, The driving unit includes a third driving subunit, which is connected to the control unit and the electroabsorption modulated laser of the first channel.

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

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

7. The dual-channel and miniaturized optical module driving circuit according to claim 6, characterized in that, The dual-channel optical module also includes a thermoelectric cooler, and the fifth driving subunit is connected to the thermoelectric cooler.

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

9. A dual-channel optical module, characterized in that, Includes the dual-channel and miniaturized optical module driver circuit as described in any one of claims 1-8.

Images