Industrial-grade optical modules, fiber-optic communication equipment and fiber-optic communication systems

Abstract

The present invention discloses an industrial-grade optical module, optical fiber communication equipment and optical fiber communication system. The industrial-grade optical module includes: an electrical interface for accessing electrical signals; a laser emitting component connected to the electrical interface, and used to convert the electrical signal accessed by the electrical interface into an optical signal output with a wavelength lower than a preset typical value; a temperature control circuit, having a resistor element for heating and compensating the laser emitting component; a main control device, which is electrically connected to the laser emitting component and the temperature control circuit respectively; the main control device is used to detect the operating temperature of the laser emitting component, and control the operation of the temperature control circuit according to the operating temperature of the laser emitting component, so that the resistor element performs heating and compensation on the laser emitting component. The industrial-grade optical module of the present invention can achieve industrial-grade temperature control without using the TEC solution.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber communication, and in particular to an industrial-grade optical module, optical fiber communication equipment and an optical fiber communication system. Background Art

[0002] At present, the construction plan of 5G base stations requires the use of CWDM (CWDM: coarse wavelength division multiplexing, which requires the use of passive wavelength division equipment to cooperate with it) optical modules to achieve networking, and industrial-grade optical modules suitable for outdoor base stations are required. The wavelength range protocol standard for each channel of passive wavelength division equipment is a typical value of plus or minus 6.5nm for the central wavelength, while the wavelength of the laser emitted by the laser transmitter changes with temperature by 0.1nm / ℃. Within the industrial temperature range (-40℃~85℃, the normal operating temperature is 25℃), the wavelength of the laser can easily exceed the limit range of the passive wavelength division channel range.

[0003] Existing optical modules use the TEC solution (Thermo Electric Cooler) to maintain a constant operating temperature; however, the TEC solution requires the addition of a complex control circuit, and once the temperature changes, it will cool / heat the system accordingly, which will not only increase the cost of the system, but also increase the power consumption of the system. In the case that the power consumption of 5G base stations has been greatly increased compared to 4G base stations, it is not conducive to large-scale deployment. In addition, the TEC solution needs to generate a large current for cooling at high temperatures, and the large current will further increase the module temperature, thus forming a vicious cycle and making the TEC solution ineffective. Summary of the invention

[0004] The main purpose of the present invention is to provide an industrial-grade optical module, aiming to achieve industrial-grade temperature control without using a TEC solution.

[0005] To achieve the above object, the present invention proposes an industrial-grade optical module. The industrial-grade optical module comprises:

[0006] Electrical interface, used for receiving electrical signals;

[0007] A laser emitting component connected to the electrical interface and used to convert the electrical signal received by the electrical interface into an optical signal with a wavelength lower than a preset central wavelength for output;

[0008] a temperature control circuit, comprising a resistor element for compensating the laser emitting assembly for heating; and

[0009] A main control device, electrically connected to the laser emitting assembly and the temperature control circuit respectively;

[0010] The main control device is used to detect the operating temperature of the laser emitting component and control the operation of the temperature control circuit according to the operating temperature of the laser emitting component, so that the resistance element performs heating compensation on the laser emitting component.

[0011] Optionally, the main control device controls the temperature control circuit to operate according to the operating temperature of the laser emitting component:

[0012] Used to compare the operating temperature of the laser emitting component with a reference temperature. When the operating temperature of the laser emitting component is lower than the reference temperature, the temperature control circuit is controlled to operate so as to increase the temperature of the laser emitting component. When the operating temperature of the laser emitting component is equal to or higher than the reference temperature, the temperature control circuit is controlled to stop operating.

[0013] Optionally, the laser emitting assembly includes a laser driver and a laser emitter, and the laser driver is electrically connected to the electrical interface, the main control device and the laser emitter respectively;

[0014] The laser driver is used to drive the laser emitter to convert the electrical signal into an optical signal and then output it under the control of the main control device according to the electrical signal input by the electrical interface;

[0015] The main control device is used to detect the operating temperature of the laser emitter as the operating temperature of the laser emitting component.

[0016] Optionally, the temperature control circuit further includes a constant current source circuit connected to the resistance element for providing a constant current power supply to control the resistance element to perform heating.

[0017] Optionally, the industrial-grade optical module further includes: a laser receiver and a limiting amplifier; the limiting amplifier is electrically connected to the electrical interface, the main control device and the laser receiver respectively;

[0018] The laser receiver is used to receive the optical signal to be converted, and to convert the optical signal into an electrical signal and then output it to the limiting amplifier; the limiting amplifier is used to, under the control of the main control device, output the electrical signal output by the laser receiver to the electrical interface after limiting amplification.

[0019] Optionally, the industrial-grade optical module further includes a transmission signal shaping circuit and a reception signal shaping circuit;

[0020] The transmission signal shaping circuit is electrically connected to the electrical interface, the laser driver and the main control device respectively; the transmission signal shaping circuit is used to extract the clock and align the data of the electrical signal connected to the electrical interface under the control of the main control device to obtain a shaped electrical signal, and output the shaped electrical signal to the laser driver;

[0021] The received signal shaping circuit is electrically connected to the limiting amplifier, the electrical interface and the main control device respectively; the received signal shaping circuit is used to, under the control of the main control device, perform clock extraction and data alignment on the electrical signal output after limiting amplification by the limiting amplifier to obtain a shaped electrical signal, and output the shaped electrical signal to the electrical interface.

[0022] Optionally, the industrial-grade optical module further includes a power management circuit; the power management circuit is electrically connected to the main control device, the electrical interface, the laser transmitter, the laser driver, the laser receiver and the limiting amplifier respectively;

[0023] The electrical interface is also used to access a power signal;

[0024] The power management circuit is used to, under the control of the main control device, convert the power signal connected to the electrical interface into a corresponding voltage and output it to the laser transmitter, the laser driver, the laser receiver and the limiting amplifier respectively, so as to power the laser transmitter, the laser driver, the laser receiver and the limiting amplifier respectively.

[0025] Optionally, the industrial-grade optical module further includes:

[0026] a printed circuit board, on which the electrical interface, the main control device, the laser driver, the temperature control circuit, the limiting amplifier and the power management circuit are arranged; and

[0027] The shell has a printed circuit board accommodated in the shell; the shell has connecting parts protruding from it corresponding to the laser driver, the laser transmitter, the limiting amplifier and the laser receiver, and the laser driver, the laser transmitter, the limiting amplifier and the laser receiver are fitted with their corresponding connecting parts to transfer heat to the shell.

[0028] The present invention also provides an optical fiber communication device, which includes a wavelength division multiplexer, a wavelength demultiplexer and the industrial-grade optical module as described above;

[0029] The wavelength division multiplexer is connected to the laser transmitter of the industrial-grade optical module to output the optical signal output by the laser transmitter after wavelength division multiplexing;

[0030] The wavelength division multiplexer is connected to the laser receiver of the industrial-grade optical module to access the optical signal, and outputs the accessed optical signal to the laser receiver after demultiplexing.

[0031] The present invention further provides an optical fiber communication system, the optical fiber communication system comprising an optical signal transceiver and an industrial-grade optical module as described above, the optical signal transceiver and the industrial-grade optical module being connected via optical fiber communication;

[0032] Alternatively, the fiber optic communication system includes an optical signal transceiver device and the fiber optic communication device as described above; the optical signal transceiver device is connected to the industrial-grade optical module in the fiber optic communication device via fiber optic communication.

[0033] The industrial-grade optical module of the present invention is provided with an electrical interface, a laser emitting component, a temperature control circuit and a main control device, and by adjusting the laser emitting component, the laser emitting component can convert the electrical signal connected to the electrical interface into an optical signal output with a wavelength lower than the typical value, so as to expand the wavelength margin of the laser wavelength of the optical signal that shifts at high temperature, thereby expanding the upper temperature limit of the optical signal that shifts at high temperature; and the real-time operating temperature of the laser emitting component is detected by the main control device, and the temperature control circuit is controlled to increase the operating temperature of the laser emitting component according to the detection result, so as to offset the influence of the low temperature environment on the optical signal. The industrial-grade optical module of the present invention adjusts the wavelength of the optical signal output by the laser emitting component so that the wavelength of the optical signal does not exceed the upper limit of the channel wavelength range at high temperature, and utilizes the temperature detection function of the main control device and the temperature control circuit constructed with simple devices to increase the temperature of the laser emitting component at low temperature, thereby achieving industrial-grade temperature control without using the TEC solution, and the wavelength adjustment process occurs during the normal manufacturing process of the laser emitting component without adding additional adjustment costs; compared with the TEC solution, there is no need to add complex control circuits, which greatly reduces the system cost, and the heating process only occurs at low temperatures, reducing the system power consumption, which is conducive to the large-scale deployment of 5G base stations, and the high temperature upper limit can be selected according to actual needs, and a vicious cycle will not be generated due to high-temperature refrigeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 This is a functional module schematic diagram of an embodiment of an industrial-grade optical module of the present invention;

[0036] Figure 2 This is a functional module schematic diagram of another embodiment of the industrial-grade optical module of the present invention;

[0037] Figure 3 for Figure 2 A schematic diagram of the circuit structure of an embodiment of a temperature control circuit;

[0038] Figure 4 The figure is a comparison of the laser wavelength changes with temperature of the traditional laser emitting component and the laser emitting component of the industrial-grade optical module of the present invention.

[0039] Description of Figure Numbers:

[0040] Label name Label name 10 Electrical interface 60 Limiting Amplifier 20 Laser emission components 70 Transmit signal shaping circuit 21 Laser Driver 80 Receive signal shaping circuit 22 Laser transmitter 90 Power Management Circuit 30 Temperature control circuit R1, R2 The first resistor and the second resistor 40 Main control device U1 Operational Amplifier 50 Laser Receiver T1 triode

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] The invention provides an industrial-grade optical module.

[0047] Reference Figures 1 to 4 In one embodiment of the present invention, the industrial-grade optical module includes:

[0048] An electrical interface 10, used for receiving electrical signals;

[0049] The laser emitting component 20 is connected to the electrical interface 10 and is used to convert the electrical signal received by the electrical interface 10 into an optical signal with a wavelength lower than a preset typical value for output;

[0050] The temperature control circuit 30 includes a resistance element for performing heating compensation on the laser emitting assembly 20;

[0051] A main control device 40 is electrically connected to the laser emitting assembly 20 and the temperature control circuit 30 respectively;

[0052] The main control device 40 is used to detect the operating temperature of the laser emitting component 20 and control the operation of the temperature control circuit 30 according to the operating temperature of the laser emitting component 20 so that the resistance element performs heating compensation on the laser emitting component 20.

[0053] The main control device 40 controls the temperature control circuit 30 to work according to the working temperature of the laser emitting assembly 20 as follows:

[0054] It is used to compare the operating temperature of the laser emitting component 20 with a reference temperature. When the operating temperature of the laser emitting component 20 is lower than the reference temperature, the temperature control circuit 30 is controlled to operate so as to increase the temperature of the laser emitting component 20. When the operating temperature of the laser emitting component 20 is equal to or higher than the reference temperature, the temperature control circuit 30 is controlled to stop operating.

[0055] In this embodiment, the electrical interface 10 can be implemented using a communication interface such as a gold finger. The electrical interface 10 can be used to access electrical signals of various rates such as 622M, 10G, and 25G. This embodiment is described using access to 25G electrical signals as an example.

[0056] The laser emitting assembly 20 can be realized by electrically connecting a laser driving circuit and a laser emitter. The laser emitting assembly 20 is used to convert the input 25G electrical signal into photoelectricity and output the corresponding 25G optical signal in the form of a laser. Those skilled in the art can make the wavelength of the 25G optical signal lower than the typical value of the center wavelength of the corresponding channel through corresponding adjustments during the production process of the laser emitting assembly 20; it should be noted that the adjustment lower limit of the wavelength of the 25G optical signal cannot be lower than the lower limit of the wavelength range of the channel (a wavelength channel only passes one beam of optical signal, the wavelength range of the channel is the typical value of the center wavelength ±6.5nm, and the optical signal is affected by temperature at 0.1nm / ℃, and the wavelength increases when the temperature rises, and decreases when the temperature decreases). It can be understood that when the wavelength of the 25G optical signal is lower than the typical value of the center wavelength of the corresponding channel, the temperature value required to reach the upper limit of the wavelength range of the channel also increases.

[0057] The temperature control circuit 30 is provided with a resistance element for heating compensation, and through relevant design, the resistance element can be arranged in the laser emitting component 20, so that the temperature control circuit 30 can control the temperature emitted by the resistance element by controlling the current flowing through the resistance element, thereby controlling the temperature of heating compensation for the laser emitting component 20. It can be understood that in other optional embodiments, the resistance element for heating compensation can also be arranged on the package of the laser emitting component 20, and the specific location of the resistance element is determined according to actual needs and is not limited here.

[0058] The main control device 40 can be implemented by a microprocessor such as MCU, DSP or FPGA. The technicians in this field can integrate relevant hardware circuits and software programs or algorithms in the main control device 40, and use relevant ports and pins to connect with other functional circuits and modules in the industrial optical module. By running the relevant circuits and software programs in the main control device 40 and calling relevant data, the various functions of the industrial optical module and processing data can be executed, and the industrial optical module can be DDM monitored and adjusted in real time. The main control device 40 can be integrated with a temperature detection circuit, and is electrically connected to the laser emission component 20 and the temperature control circuit 30 through relevant ports or pins; wherein, the temperature detection circuit can be implemented by a voltage divider circuit composed of a thermistor; the main control device 40 can analyze the change of the voltage value on the thermistor through the integrated software program and algorithm to obtain the real-time operating temperature of the laser emission component 20, and compare the real-time operating temperature with a reference temperature pre-stored in the main control device 40. When the operating temperature of the laser emission component 20 is lower than the reference temperature, the temperature control circuit 30 is driven to increase the temperature of the laser emission component 20. It is understandable that when the temperature of the laser emitting assembly 20 is heated and compensated to a preset temperature value by the temperature control circuit 30, the main control device 40 will control the temperature control circuit 30 to stop working. It should be noted that the value of the reference temperature must satisfy that the wavelength of the 25G optical signal does not exceed the lower limit of the channel wavelength range at this reference temperature; and since the temperature rise takes time, in order to avoid the wavelength of the 25G optical signal exceeding the lower limit of the channel wavelength range when the temperature rises (the temperature drop rate exceeds the heating compensation rate), the reference temperature value needs to leave a certain margin value. In other optional embodiments, the temperature detection circuit can also be implemented using a temperature sensor.

[0059] In an optional embodiment, taking 25° C. as an example of a normal operating temperature, by adjusting the wavelength value of the laser emitting component 20 at 25° C. from 1271 nm to 1269 nm, the wavelength range of the corresponding channel is (1271+6.5 to 1271-6.5). After adjustment, there is a margin of 8.5nm from 1269nm to 1277.5 (1271+6.5)nm, corresponding to a temperature rise margin of 85°C, which can ensure that the wavelength of the 25G optical signal does not exceed the standard before the temperature reaches 110°C (25°C+85°C); in the low temperature condition, there is only a margin of 4.5nm from 1269nm to the lower limit of the wavelength range 1264.5nm (1271-6.5), corresponding to a temperature drop margin of 45°C, and there is a temperature change of 65°C from 25°C to -40°C, so heating is started from a preset temperature value, for example: -10°C, and the temperature of the laser emitting component 20 is maintained at a preset temperature value of -10°C to ensure that the wavelength of the 25G optical signal does not drop at low temperatures. In this way, the wavelength of the 25G optical signal emitted by the laser emitter 22 in the temperature range of -40°C to 110°C does not exceed the wavelength range of the channel.

[0060] The industrial-grade optical module of the present invention is provided with an electrical interface 10, a laser emitting component 20, a temperature control circuit 30 and a main control device 40, and by adjusting the laser emitting component 20, the laser emitting component 20 can convert the electrical signal connected to the electrical interface 10 into an optical signal output with a wavelength lower than the typical value, so as to expand the wavelength margin of the laser wavelength of the optical signal that shifts at high temperature, thereby expanding the upper temperature limit of the optical signal that shifts at high temperature; and the real-time operating temperature of the laser emitting component 20 is detected by the main control device 40, and the temperature control circuit 30 is controlled to increase the operating temperature of the laser emitting component 20 according to the detection result, so as to offset the influence of the low temperature environment on the optical signal. The industrial-grade optical module of the present invention adjusts the wavelength of the optical signal output by the laser emitting component 20 so that the wavelength of the optical signal does not exceed the upper limit of the channel wavelength range at high temperature, and utilizes the temperature detection function of the main control device 40 and the temperature control circuit 30 constructed with simple components to increase the temperature of the laser emitting component 20 at low temperature, thereby achieving industrial-grade temperature control without using the TEC solution, and the wavelength adjustment process occurs during the normal manufacturing process of the laser emitting component 20 without adding additional adjustment costs; compared with the TEC solution, there is no need to add complex control circuits, which greatly reduces the system cost, and the heating process only occurs at low temperatures, reducing the system power consumption, which is conducive to the large-scale deployment of 5G base stations, and the high temperature upper limit can be selected according to actual needs, and a vicious cycle will not be generated due to high-temperature refrigeration.

[0061] Reference Figures 1 to 4 In one embodiment of the present invention, the laser emitting assembly 20 includes a laser driver 21 and a laser emitter 22, and the laser driver 21 is electrically connected to the electrical interface 10, the main control device 40 and the laser emitter 22 respectively;

[0062] The laser driver 21 is used to drive the laser emitter 22 to convert the electrical signal into an optical signal and then output it under the control of the main control device 40 according to the electrical signal input from the electrical interface 10;

[0063] The main control device 40 is used to detect the operating temperature of the laser emitter 22 as the operating temperature of the laser emitting assembly 20 .

[0064] In this embodiment, the laser driver 21 can be implemented by a laser driving circuit, and the laser emitter 22 can be implemented by a FP semiconductor laser chip or a DFP semiconductor laser chip; the laser driver 21 is used to control the corresponding electronic device to work in the optimal working range according to various control signals output by the main control device 40, so that the laser emitter 22 can be driven to emit corresponding lasers according to the 25G electrical signal connected to the electrical interface 10 at different times, so as to realize the conversion of the 25G electrical signal to the 25G optical signal. It can be understood that when the laser emitter 22 adopts a DFP semiconductor laser chip, those skilled in the art can change the grating to form optical coupling by adjusting the grating pitch between the gratings during the manufacturing process, so as to adjust the wavelength of the 25G optical signal to below the typical value of the channel center wavelength (the principle of the FP semiconductor laser chip: by stimulating the semiconductor material to transition between energy bands to emit light, and using the resonant cavity to make the light oscillate, feedback and generate radiation amplification, thereby outputting laser, and the DFP semiconductor laser chip replaces oscillation with optical coupling formed by the grating). Of course, in other optional embodiments, the laser wavelength can be adjusted by adjusting the ratio of high-energy particles to low-energy particles in the laser emitter 22, or by adjusting the feedback effect of the resonant cavity, or by adjusting the overall gain medium.

[0065] The influence of ambient temperature is reflected in the offset of the wavelength of the 25G optical signal. Therefore, the main control device 40 detects the temperature of the laser transmitter 22 as the ambient temperature of the 25G optical signal. It can be understood that the main control device 40 can also detect the temperature of other components, such as the temperature of the laser driver 21, and obtain the ambient temperature of the 25G optical signal through corresponding calculations. By adjusting the wavelength during the normal manufacturing process of the laser transmitter 22, there is no need to increase additional adjustment costs, and the upper temperature limit can be flexibly adjusted according to actual needs, which is conducive to application in various usage scenarios of 5G.

[0066] Reference Figures 1 to 4 In one embodiment of the present invention, the temperature control circuit 30 further includes a constant current source circuit connected to the resistor element for providing a constant current power supply to control the resistor element to perform heating.

[0067] In this embodiment, the constant current source circuit is constructed by using a switch device, a resistor element and an operational amplifier, wherein the switch device can be a combination of one or more of a triode, a MOS tube and an IGBT. The constant current source circuit is used to stably control the current flowing through the resistor element for heating compensation under the control of the main control device 40, so that the resistor element can perform corresponding heating compensation according to the detection result of the main control device 40; specifically, when the main control device 40 detects that the operating temperature of the laser emission component 20 is from the reference temperature to -40°C, when the operating temperature is closer to -40°C, the constant current source circuit can make the current value flowing through the resistor larger according to the received temperature control signal, so that the heat generated is also greater; when the operating temperature is closer to the reference temperature, the current value flowing through it is smaller, and when the temperature is equal to the reference temperature, the current value flowing through it is 0.

[0068] In an optional embodiment, the temperature control circuit 30 includes an operational amplifier U1, a first resistor R1, a second resistor R2 and an NPN transistor T1; wherein the first resistor R1 is a resistor element for heating compensation; the operational amplifier U1, the second resistor R2 and the transistor T1 are connected to each other to form a constant current source circuit. One end of the first resistor R1 and the in-phase end of the operational amplifier U1 are connected to each other and then electrically connected to the relevant port / pin of the main control device 40, the other end of the first resistor R1 is connected to the input end of the NPN transistor T1, the controlled end of the NPN transistor T1 is connected to the output end of the operational amplifier U1, the output end of the NPN transistor T1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, and the reverse end of the operational amplifier U1 is connected to the common end of the NPN transistor T1 and the second resistor R2. The current value flowing through the first resistor R1 is I=V cc R2, the heat generated by the first resistor R1 can be calculated by the formula Q = I 2 R 1 Therefore, the main control device 40 can control the heat generated by the first resistor R1 by controlling the voltage value output to one end of the first resistor R1 and the non-inverting end of the operational amplifier U1. By using a constant current source circuit and the resistor element R1 to construct the temperature control circuit 30, the main control device 40 can control the temperature compensated by the resistor element R1 by controlling the voltage.

[0069] Reference Figures 1 to 4 In one embodiment of the present invention, the industrial-grade optical module further includes: a laser receiver 50 and a limiting amplifier 60; the limiting amplifier 60 is electrically connected to the electrical interface 10, the main control device 40 and the limiting amplifier 60 respectively;

[0070] The laser receiver 50 is used to receive an optical signal and convert the optical signal into an electrical signal and output it to the limiting amplifier 60; the limiting amplifier 60 is used to, under the control of the main control device 40, output the electrical signal output by the laser receiver 50 to the electrical interface 10 after limiting amplification.

[0071] In this embodiment, the laser receiver 50 can be implemented by using a photosensitive device such as an avalanche photodiode, and the limiting amplifier 60 can be implemented by using a limiting amplifier circuit. When the laser receiver 50 receives an optical signal, the current flowing through it will change, thereby converting the 25G optical signal into a 25G electrical signal. The limiting amplifier 60 is used to output the 25G electrical signal converted by the laser receiver 50 after limiting amplification. Specifically, when the signal amplitude of the 25G electrical signal received by the limiting amplifier 60 is normal, the limiting amplifier 60 works in the linear working area, amplifies the 25G electrical signal and outputs it; when the signal amplitude of the 25G electrical signal exceeds the upper limit level, the limiting amplifier 60 works in the nonlinear working area, and the limiting amplifier 60 outputs an upper limit electrical signal. At this time, the main control device 40 can detect the rate of the electrical signal input to the limiting amplifier 60 through the corresponding detection port, and at the same time adjust the amplification factor and the upper limit level of the limiting amplifier 60 through the corresponding control port, so that the working state of the limiting amplifier 60 can match the rate of the electrical signal. By providing a light receiving component, the industrial-grade optical module of the present invention also has the function of receiving optical signals, and by providing a limiting amplifier 60, the electrical signal converted from the optical signal can be preliminarily processed.

[0072] Reference Figures 1 to 4 , in one embodiment of the present invention, the industrial-grade optical module further includes a transmission signal shaping circuit 70 and a reception signal shaping circuit 80;

[0073] The transmission signal shaping circuit 70 is electrically connected to the electrical interface 10, the laser driver 21 and the main control device 40 respectively; the transmission signal shaping circuit 70 is used to extract the clock and align the data of the electrical signal received by the electrical interface 10 under the control of the main control device 40 to obtain a shaped electrical signal, and output the shaped electrical signal to the laser driver 21;

[0074] The received signal shaping circuit 80 is electrically connected to the limiting amplifier 60, the electrical interface 10 and the main control device 40 respectively; the received signal shaping circuit 80 is used to, under the control of the main control device 40, perform clock extraction and data alignment on the electrical signal output after limiting amplification by the limiting amplifier 60 to obtain a shaped electrical signal, and output the shaped electrical signal to the electrical interface 10.

[0075] In this embodiment, both the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 can be implemented by using a CDR clock data recovery circuit. The transmission signal shaping circuit 70 and the reception signal shaping circuit 80 are used to extract the corresponding data sequence from the input 25G electrical signal according to the corresponding reference clock, and recover the corresponding clock signal from the data sequence, so that the 25G electrical signal is converted into the form of a clock signal; since the 25G electrical signal is lost during the transmission process, it is also necessary to perform phase adjustment on the 25G electrical signal in the form of a clock signal by means of data alignment, reduce jitter and other corresponding shaping processes, so that the 25G electrical signal in the form of a clock signal meets the transmission requirements of subsequent functional modules.

[0076] In this embodiment, the main control device 40 can also detect the rate of the electrical signal input to the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 through the corresponding ports, and configure the working state of the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 through the corresponding ports, so that the clock extraction and shaping processing can match the rate of the electrical signal, and the reference clock can be obtained by the main control device 40 according to the detection result output. It can be understood that the main control device 40 can also control the opening and bypassing of the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 to achieve compatible transmission of high-rate electrical signals and low-rate electrical signals. By setting the transmission signal shaping circuit 70 and the reception signal shaping circuit 80, the stability of the 25G electrical signal can be improved, which is conducive to increasing the effective distance of signal transmission.

[0077] Reference Figures 1 to 4 In one embodiment of the present invention, the industrial-grade optical module further includes a power management circuit 90; the power management circuit 90 is electrically connected to the main control device 40, the electrical interface 10, the laser transmitter 22, the laser driver 21, the laser receiver 50 and the limiting amplifier 60 respectively;

[0078] The electrical interface 10 is also used to access the power signal;

[0079] The power management circuit 90 is used to, under the control of the main control device 40, connect the power signal of the electrical interface 10 to the laser emitter 22, the laser driver 21, the laser receiver 50 and the limiting amplifier 60 respectively after corresponding voltage conversion, so as to power the laser emitter 22, the laser driver 21, the laser receiver 50 and the limiting amplifier 60 respectively.

[0080] In this embodiment, the power management circuit 90 can be implemented by a multi-channel DC-DC circuit or a power management integrated circuit. The electrical interface 10 is also used to access the DC voltage to provide the power supply voltage for the optical module to work. In an optional embodiment, the power supply ends of the main control device 40, the transmission signal shaping circuit 70 and the receiving signal shaping circuit 80 are respectively connected to the electrical interface 10, and the DC voltage connected to the electrical interface 10 is directly powered. The main control device 40 can control the power management circuit 90 to output a suitable power supply voltage to the corresponding functional circuit according to the monitoring results of other functional circuits to provide a suitable working voltage for the functional module or components in the circuit. In other optional embodiments, the power management circuit 90 also has a power-on slow start function, which is used to control the power-on timing of each functional circuit in the optical module at the initial stage of powering on the optical module to avoid damage to each circuit caused by the power-on impact current. It can be understood that the main control device 40 can also be used to detect the working voltage of each functional circuit in the optical module, and when the working voltage of each functional circuit is detected to be overvoltage or undervoltage, the corresponding control signal is output to the power management circuit 90 to control the power management circuit 90 to disconnect the power supply of the circuit. By providing the power management circuit 90 , each functional module in the optical module can work in a suitable working range, thereby reducing the overall loss of the optical module.

[0081] Reference Figures 1 to 4 In one embodiment of the present invention, the industrial-grade optical module further includes:

[0082] a printed circuit board, on which the electrical interface 10, the main control device 40, the laser driver 21, the temperature control circuit 30, the limiting amplifier 60 and the power management circuit 90 are arranged; and

[0083] The shell has the printed circuit board accommodated in it; the shell has connecting parts protruding from it corresponding to the laser driver 21, the laser emitter 22, the limiting amplifier 60 and the laser receiver 50, and the laser driver 21, the laser emitter 22, the limiting amplifier 60 and the laser receiver 50 are fitted with their corresponding connecting parts to transfer heat to the shell.

[0084] In this embodiment, the shell can be made of high thermal conductivity material, and the printed circuit board can use a printed circuit board with a high TG value. The laser driver 21, laser transmitter 22, limiting amplifier 60 and laser receiver 50 in the optical module are all devices that generate large amounts of heat and are sensitive to temperature; therefore, the shell increases the bonding area with such devices to enhance the heat dissipation capacity of the above devices at high temperatures. In other optional embodiments, EMI (electromagnetic interference) materials can also be used in the packaging of the above devices to ensure the stability of the EMI characteristics of the above devices. By using a shell made of high thermal conductivity material and a printed circuit board with a high TG value, it can be ensured that the functional circuits in the optical module can work normally at high temperatures.

[0085] The present invention also provides an optical fiber communication device, the optical fiber communication device comprising a wavelength division multiplexer, a wavelength demultiplexer and the industrial-grade optical module as described above;

[0086] The wavelength division multiplexer is connected to the laser transmitter 22, so as to output the optical signal output by the laser transmitter 22 after wavelength division multiplexing;

[0087] The wavelength division multiplexer is connected to the laser receiver 50 to receive optical signals and output the received optical signals to the laser receiver 50 after demultiplexing.

[0088] The fiber optic communication device includes the above-mentioned industrial-grade optical module; the detailed structure of the industrial-grade optical module can refer to the above-mentioned embodiment and will not be repeated here; it can be understood that since the above-mentioned industrial-grade optical module is used in the fiber optic communication device, the embodiment of the fiber optic communication device includes all technical solutions of all embodiments of the above-mentioned industrial-grade optical module, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0089] In this embodiment, the fiber optic communication device can be used to access multiple electrical signals, and a plurality of laser transmitters 22 are correspondingly arranged in the fiber optic communication device. The plurality of laser transmitters 22 are used to convert the multiple electrical signals into corresponding optical signals and then output them to the wavelength division multiplexer, so as to wavelength-division multiplex the multiple optical signals and then output them through the optical fiber, thereby improving the utilization rate of the optical fiber; it can be understood that when the fiber optic communication device receives the wavelength-division multiplexed optical signal through the optical fiber, the wavelength division multiplexer can decompose the wavelength-division multiplexed optical signal into corresponding optical signals and output them to the corresponding laser receivers 50, so as to convert them into corresponding electrical signals and then output them.

[0090] The present invention also provides an optical fiber communication system, the optical fiber communication system comprising an optical signal transceiver and an industrial-grade optical module as described above, the optical signal transceiver and the industrial-grade optical module being connected via optical fiber communication;

[0091] Alternatively, the fiber optic communication system includes an optical signal transceiver device and the fiber optic communication device as described above; the optical signal transceiver device is connected to the industrial-grade optical module in the fiber optic communication device via fiber optic communication.

[0092] The optical fiber communication system includes the above-mentioned industrial-grade optical module; the detailed structure of the industrial-grade optical module can refer to the above-mentioned embodiment, which will not be repeated here; it can be understood that since the above-mentioned industrial-grade optical module is used in the optical fiber communication system, the embodiment of the optical fiber communication system includes all technical solutions of all embodiments of the above-mentioned industrial-grade optical module, and the technical effects achieved are also exactly the same, which will not be repeated here. The optical fiber communication system can also include the above-mentioned optical fiber communication equipment, which has been described above and will not be repeated here.

[0093] In this embodiment, a plurality of industrial-grade optical modules of the present invention or a plurality of optical fiber communication devices may be provided in the optical fiber communication system according to actual needs, and they may be connected to each other via optical fibers for optical fiber communication.

[0094] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An industrial-grade optical module, characterized in that: The industrial-grade optical module includes: Electrical interface, used for receiving electrical signals; A laser emitting assembly connected to the electrical interface and used to convert the electrical signal connected to the electrical interface into an optical signal for output; the laser emitting assembly is used to convert the electrical signal connected to the electrical interface into an optical signal for output having a wavelength lower than a typical value of the central wavelength of the corresponding channel when operating at a preset normal operating temperature, so that when the operating temperature of the laser emitting assembly increases, the wavelength of the optical signal output by the laser emitting assembly is not higher than the upper limit of the wavelength range of the corresponding channel; A temperature control circuit, comprising a resistor element for performing heating compensation on the laser emitting assembly, wherein when the operating temperature of the laser emitting assembly is lower than a preset reference temperature, the temperature control circuit operates to increase the operating temperature of the laser emitting assembly so that the wavelength of the optical signal output by the laser emitting assembly is not lower than the lower limit of the wavelength range of the corresponding channel; A main control device, electrically connected to the laser emitting assembly and the temperature control circuit respectively; The main control device is used to detect the operating temperature of the laser emitting component and control the operation of the temperature control circuit according to the operating temperature of the laser emitting component, so that the resistance element performs heating compensation on the laser emitting component.

2. The industrial-grade optical module according to claim 1, characterized in that: The main control device controls the temperature control circuit to work according to the working temperature of the laser emitting component: Used to compare the operating temperature of the laser emitting component with a reference temperature. When the operating temperature of the laser emitting component is lower than the reference temperature, the temperature control circuit is controlled to operate so as to increase the temperature of the laser emitting component. When the operating temperature of the laser emitting component is equal to or higher than the reference temperature, the temperature control circuit is controlled to stop operating.

3. The industrial-grade optical module according to claim 2, characterized in that: The laser emission assembly includes a laser driver and a laser emitter, and the laser driver is electrically connected to the electrical interface, the main control device and the laser emitter respectively; The laser driver is used to drive the laser emitter to convert the electrical signal into an optical signal and then output it under the control of the main control device according to the electrical signal input by the electrical interface; The main control device is used to detect the operating temperature of the laser emitter as the operating temperature of the laser emitting component.

4. The industrial-grade optical module according to claim 3, characterized in that: The temperature control circuit also includes a constant current source circuit connected to the resistance element for providing a constant current power supply to control the resistance element to perform heating.

5. The industrial-grade optical module according to claim 3, characterized in that: The industrial-grade optical module further includes: a laser receiver and a limiting amplifier; the limiting amplifier is electrically connected to the electrical interface, the main control device and the laser receiver respectively; The laser receiver is used to receive the optical signal to be converted, and to convert the optical signal to be converted into an electrical signal and then output it to the limiting amplifier; the limiting amplifier is used to, under the control of the main control device, output the electrical signal output by the laser receiver to the electrical interface after limiting amplification.

6. The industrial-grade optical module according to claim 5, characterized in that: The industrial-grade optical module also includes a transmission signal shaping circuit and a reception signal shaping circuit; The transmission signal shaping circuit is electrically connected to the electrical interface, the laser driver and the main control device respectively; The transmission signal shaping circuit is used to extract the clock and align the data of the electrical signal connected to the electrical interface under the control of the main control device to obtain a shaped electrical signal, and output the shaped electrical signal to the laser driver; The received signal shaping circuit is electrically connected to the limiting amplifier, the electrical interface and the main control device respectively; the received signal shaping circuit is used to, under the control of the main control device, perform clock extraction and data alignment on the electrical signal output after limiting amplification by the limiting amplifier to obtain a shaped electrical signal, and output the shaped electrical signal to the electrical interface.

7. The industrial-grade optical module according to claim 6, characterized in that: The industrial-grade optical module further includes a power management circuit; the power management circuit is electrically connected to the main control device, the electrical interface, the laser transmitter, the laser driver, the laser receiver and the limiting amplifier respectively; The electrical interface is also used to access a power signal; The power management circuit is used to, under the control of the main control device, convert the power signal connected to the electrical interface into a corresponding voltage and output it to the laser transmitter, the laser driver, the laser receiver and the limiting amplifier respectively, so as to power the laser transmitter, the laser driver, the laser receiver and the limiting amplifier respectively.

8. The industrial-grade optical module according to claim 7, characterized in that: The industrial-grade optical module also includes: a printed circuit board, on which the electrical interface, the main control device, the laser driver, the temperature control circuit, the limiting amplifier and the power management circuit are arranged; and The shell has a printed circuit board accommodated in the shell; the shell has connecting parts protruding from it corresponding to the laser driver, the laser transmitter, the limiting amplifier and the laser receiver, and the laser driver, the laser transmitter, the limiting amplifier and the laser receiver are fitted with their corresponding connecting parts to transfer heat to the shell.

9. An optical fiber communication device, characterized in that: The optical fiber communication equipment includes a wavelength division multiplexer, a wavelength demultiplexer and an industrial-grade optical module as claimed in any one of claims 1 to 8; The wavelength division multiplexer is connected to the laser transmitter of the industrial-grade optical module to output the optical signal output by the laser transmitter after wavelength division multiplexing; The wavelength division multiplexer is connected to the laser receiver of the industrial-grade optical module to access the optical signal, and outputs the accessed optical signal to the laser receiver after demultiplexing.

10. An optical fiber communication system, characterized in that: The optical fiber communication system comprises an optical signal transceiver device and an industrial-grade optical module according to any one of claims 1 to 8, wherein the optical signal transceiver device is connected to the industrial-grade optical module via optical fiber communication; Alternatively, the fiber optic communication system includes an optical signal transceiver device and the fiber optic communication device as claimed in claim 9; the optical signal transceiver device is connected to the industrial-grade optical module in the fiber optic communication device via fiber optic communication.

Images