CN213690019U - Industrial optical module, optical fiber communication equipment and optical fiber communication system - Google Patents
Industrial optical module, optical fiber communication equipment and optical fiber communication system Download PDFInfo
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- CN213690019U CN213690019U CN202021741886.2U CN202021741886U CN213690019U CN 213690019 U CN213690019 U CN 213690019U CN 202021741886 U CN202021741886 U CN 202021741886U CN 213690019 U CN213690019 U CN 213690019U
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Abstract
The utility model discloses an industrial grade optical module, optical fiber communication equipment and optical fiber communication system. The industrial grade optical module comprises: the electrical interface is used for accessing an electrical signal; the laser emission component is connected with the electrical interface and used for converting the electrical signal accessed by the electrical interface into an optical signal with the wavelength lower than a preset typical value and outputting the optical signal; a temperature control circuit having a resistance element for performing heating compensation on the laser emitting assembly; the main control device is electrically connected with the laser emission assembly and the temperature control circuit respectively; and the main control device is used for detecting the working temperature of the laser emission assembly and outputting a corresponding temperature control signal to the temperature control circuit according to the working temperature of the laser emission assembly, so that the temperature control circuit can drive the resistance element to carry out heating compensation on the laser emission assembly according to the received temperature control signal. The utility model discloses industrial grade optical module can realize industrial grade temperature control under the prerequisite that does not use the TEC scheme.
Description
Technical Field
The utility model relates to an optical fiber communication field, in particular to industrial grade optical module, optical fiber communication equipment and optical fiber communication system.
Background
At present, in 5G base station construction planning, in consideration of optical fiber resources and bandwidth, a CWDM (CWDM: coarse wavelength division multiplexing, which needs to be matched with a passive wavelength division device) optical module is required to realize networking, and an industrial optical module applicable to an outdoor base station is required. The standard of the wavelength range protocol of each channel of the passive wavelength division equipment is that the typical value of the central wavelength is plus or minus 6.5nm, the wavelength of the laser emitted by the laser emitter is changed to 0.1 nm/DEG C along with the temperature, and the wavelength of the laser is easy to exceed the limit range of the passive wavelength division channel range within the industrial temperature range (-40-85 ℃ and the normal working temperature is 25 ℃).
The existing optical module adopts a TEC scheme (Thermo Electric Cooler) to maintain the working temperature unchanged; however, the TEC scheme requires a complex control circuit to be added, and the temperature can be correspondingly cooled/heated once changing, which not only increases the cost of the system, but also increases the power consumption of the system, which is not favorable for large-scale deployment under the condition that the power consumption of the 5G base station is greatly increased compared with that of the 4G base station, and when the TEC scheme is at a high temperature, a large current needs to be generated for cooling, and the large current can further raise the temperature of the module, thereby vicious circle and failure of the TEC scheme.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an industrial grade optical module aims at not using under the prerequisite of TEC scheme, realizes industrial grade temperature control.
In order to achieve the above object, the present invention provides an industrial-grade optical module. The industrial grade optical module comprises:
the electrical interface is used for accessing an electrical signal;
the laser emission component is connected with the electrical interface and used for converting the electrical signal accessed by the electrical interface into an optical signal with the wavelength lower than a preset typical value and outputting the optical signal;
the temperature control circuit comprises a resistance element for heating compensation of the laser emitting assembly; and
the main control device is electrically connected with the laser emission assembly and the temperature control circuit respectively;
the main control device is used for detecting the working temperature of the laser emission assembly and outputting a corresponding temperature control signal to the temperature control circuit according to the working temperature of the laser emission assembly, so that the temperature control circuit can drive the resistance element to heat and compensate the laser emission assembly according to the received temperature control signal.
Optionally, the laser emission assembly includes a laser driver and a laser emitter, and the laser driver is electrically connected to the electrical interface, the master control device and the laser emitter respectively;
the laser driver is used for driving the laser transmitter to convert an electric signal into an optical signal and output the optical signal according to the electric signal input by the electric interface under the control of the main control device;
the main control device is used for detecting the working temperature of the laser transmitter to serve as the working temperature of the laser transmitting assembly.
Optionally, the temperature control circuit further includes a constant current source circuit, connected to the resistive element, and configured to provide a constant current source to control the resistive element to perform heating operation.
Optionally, the constant current source circuit includes an operational amplifier, a current-limiting resistor and a switching tube; the in-phase end of the operational amplifier and one end of the resistance element are connected with each other and then electrically connected with the main control device, and the output end of the operational amplifier is connected with the controlled end of the switching tube; the input end of the switch tube is connected with the other end of the resistor element, and the output end of the switch tube is connected with one end of the current-limiting resistor; the other end of the current limiting resistor is grounded; and the output end of the operational amplifier is connected with the common end of the switching tube and the current-limiting resistor.
Optionally, the industrial-grade light module further includes: a laser receiver and a limiting amplifier; the limiting amplifier is electrically connected with the electrical interface, the master control device and the limiting amplifier respectively;
the laser receiver is used for accessing an optical signal, converting the optical signal into an electric signal and outputting the electric signal to the limiting amplifier; and the limiting amplifier is used for outputting the electric signal output by the laser receiver to the electric interface after limiting and amplifying under the control of the main control device.
Optionally, the industrial-grade optical module further includes a transmit signal shaping circuit and a receive signal shaping circuit;
the emission signal shaping circuit is respectively and electrically connected with the electrical interface, the laser driver and the master control device; the emission signal shaping circuit is used for shaping the electric signal accessed by the electric interface under the control of the main control device and outputting the shaped electric signal to the laser driver;
the receiving signal shaping circuit is respectively and electrically connected with the limiting amplifier, the electrical interface and the master control device; and the received signal shaping circuit is used for shaping the electric signal output by the amplitude limiting amplifier after amplitude limiting amplification under the control of the main control device and outputting the shaped electric signal to the electric interface.
Optionally, the industrial-grade optical module further includes a power management circuit; the power management circuit is respectively and electrically connected with the master control device, the electrical interface, the laser transmitter, the laser driver, the laser receiver and the limiting amplifier;
the electrical interface is also used for accessing a power supply signal;
the power management circuit is used for respectively outputting the power signals accessed by the electrical interface to the laser transmitter, the laser driver, the laser receiver and the limiting amplifier after corresponding voltage conversion under the control of the main control device so as to respectively supply power for the laser transmitter, the laser driver, the laser receiver and the limiting amplifier.
Optionally, the industrial-grade light module further includes:
the electrical interface, the master control device, the laser driver, the temperature control circuit, the limiting amplifier and the power management circuit are arranged on the printed circuit board; and
the printed circuit board is accommodated in the shell; the shell corresponds to the laser driver, the laser transmitter, the limiting amplifier and the laser receiver and is respectively provided with a connecting part in a protruding mode, and the laser driver, the laser transmitter, the limiting amplifier and the laser receiver are attached to the corresponding connecting parts respectively to transfer heat to the shell.
The utility model also provides an optical fiber communication device, which comprises a wavelength division multiplexer, a wavelength division demultiplexer and the industrial optical module;
the wavelength division multiplexer is connected with the laser transmitter and is used for outputting optical signals output by the laser transmitter after wavelength division multiplexing;
the wavelength division demultiplexer is connected with the laser receiver and used for accessing optical signals and outputting the accessed optical signals to the laser receiver after decomposition and multiplexing.
The utility model also provides an optical fiber communication system, the optical fiber communication system includes optical signal transceiver and the industrial optical module as above, the optical signal transceiver and the industrial optical module are connected through optical fiber communication;
or, the optical fiber communication system comprises an optical signal transceiver and the above optical fiber communication device; the optical signal transceiver is in communication connection with the industrial-grade optical module in the optical fiber communication equipment through optical fibers.
The utility model discloses industrial-grade optical module is through setting up electric interface, laser emission subassembly, temperature control circuit and master control set to through adjusting the laser emission subassembly, make the laser emission subassembly can convert the electric signal that the electric interface inserts into the optical signal output that the wavelength is less than the typical value, take place the wavelength surplus of skew in order to enlarge the laser wavelength of optical signal when high temperature, thereby enlarged the temperature upper limit that optical signal takes place the high temperature skew; and detecting the real-time working temperature of the laser emission assembly through the main control device, and controlling the temperature control circuit to increase the working temperature of the laser emission assembly according to the detection result so as to counteract the influence of the low-temperature environment on the optical signal. The utility model discloses industrial-grade optical module is through adjusting the wavelength that laser emission subassembly outputted optical signal to make the optical signal wavelength when high temperature, can not surpass the upper limit of passageway wavelength range, and utilize the temperature control circuit that master control set's temperature detection function and simple device found, rise the temperature of laser emission subassembly when low temperature, thereby can realize industrial-grade temperature control under the prerequisite that does not use the TEC scheme, and the adjustment process of wavelength takes place in the normal manufacturing process of laser emission subassembly, need not to increase extra adjustment cost; compared with the TEC scheme, a complex control circuit is not required to be added, the system cost is greatly reduced, the power consumption of the system is reduced when the temperature rise process is only carried out at low temperature, the large-scale deployment of the 5G base station is facilitated, the upper limit of the high temperature can be selected according to actual needs, and vicious circle caused by high-temperature refrigeration can be avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of a functional module according to an embodiment of the industrial-grade optical module of the present invention;
fig. 2 is a schematic diagram of a functional module according to another embodiment of the industrial-grade optical module of the present invention;
FIG. 3 is a circuit diagram of an embodiment of the temperature control circuit of FIG. 2;
fig. 4 is a comparison graph of the laser wavelength of the laser emitting assembly of the conventional laser emitting assembly and the industrial optical module of the present invention along with the temperature change.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) | |
| 10 | |
70 | Transmitted |
|
| 20 | |
80 | Received |
|
| 21 | |
90 | |
|
| 22 | Laser transmitter | | Resistance element | |
| 30 | Temperature control circuit | R2 | Current- |
|
| 40 | Master control device | U1 | |
|
| 50 | Laser receiver | T1 | Switch |
|
| 60 | Limiting amplifier |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an industrial grade optical module.
Referring to fig. 1 to 4, in an embodiment of the present invention, the industrial-grade optical module includes:
an electrical interface 10 for accessing electrical signals;
the laser emitting component 20 is connected with the electrical interface 10 and is used for converting the electrical signal accessed by the electrical interface 10 into an optical signal with a wavelength lower than a preset typical value and outputting the optical signal;
a temperature control circuit 30 including a resistive element for heating compensation of the laser emitting assembly 20;
the main control device 40 is electrically connected with the laser emitting assembly 20 and the temperature control circuit 30 respectively;
the main control device 40 is configured to detect the operating temperature of the laser emitting assembly 20, and output a corresponding temperature control signal to the temperature control circuit 30 according to the operating temperature of the laser emitting assembly 20, so that the temperature control circuit 30 can drive the resistance element to perform heating compensation on the laser emitting assembly 20 according to the received temperature control signal.
In this embodiment, the electrical interface 10 may be implemented by using a communication interface such as a gold finger, and the electrical interface 10 may be used to access electrical signals with multiple rates such as 622M, 10G, and 25G, and this embodiment takes the access of 25G electrical signals as an example for description.
The laser emitting assembly 20 may be implemented using laser driver circuitry and a laser transmitter electrical connection. The laser emitting assembly 20 is configured to perform photoelectric conversion on the input 25G electrical signal, and output a corresponding 25G optical signal in the form of laser light. 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 by adjusting accordingly during the manufacturing process of the laser emitting assembly 20; it should be noted that the lower limit of the wavelength adjustment for the 25G optical signal cannot be lower than the lower limit of the wavelength range of the channel (one wavelength channel only passes one optical signal, the wavelength range of the channel is a typical value of the central wavelength ± 6.5nm, and the optical signal is affected by temperature to 0.1 nm/deg.c, and the wavelength increases with the temperature increase and decreases with the temperature decrease). It will be appreciated that when the wavelength of a 25G optical signal is below the typical value for the central wavelength of the corresponding channel, the temperature value required to rise to the upper limit of the wavelength range of the channel will also increase.
The temperature control circuit 30 is constructed by using a switching device, a resistance element, and an operational amplifier. The temperature control circuit 30 is provided with a resistance element for heating compensation, and through related design, the resistance element can be provided in the laser emitting assembly 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 for heating compensation of the laser emitting assembly 20. It is understood that, in other alternative embodiments, the resistance element for heating compensation may also be disposed on the package of the laser emitting assembly 20, and the specific position of the resistance element is determined according to actual needs, and is not limited herein.
The main control device 40 can be implemented by a microprocessor such as an MCU, a DSP, or an FPGA, and a person skilled in the art can integrate related hardware circuits and software programs or algorithms into the main control device 40, and can connect with other functional circuits and modules in the industrial optical module by using related ports and pins, and perform various functions and process data of the industrial optical module by operating the related circuits and software programs in the main control device 40 and calling related data, so as to perform DDM monitoring and real-time adjustment on the industrial optical module. The main control device 40 may be integrated with a temperature detection circuit, and is electrically connected to the laser emitting assembly 20 and the temperature control circuit 30 through related ports or pins, respectively; the temperature detection circuit can be realized by adopting a voltage division circuit consisting of thermistors; the main control device 40 can analyze the change of the voltage value on the thermistor through an integrated software program and algorithm to obtain the real-time working temperature of the laser emitting assembly 20, and compare the real-time working temperature with a reference temperature pre-stored in the main control device 40, when the working temperature of the laser emitting assembly 20 is equal to or greater than the reference temperature, the main control device 40 does not output a temperature control signal to the temperature control circuit 30, and at this time, the temperature control circuit 30 stops working; when the operating temperature of the laser emitting assembly 20 is lower than the reference temperature, the main control device 40 may output a corresponding temperature driving signal according to a temperature difference between the operating temperature and the reference temperature, so as to drive the temperature control circuit 30 to correspondingly increase the temperature of the laser emitting assembly 20. It is to be understood that; when the temperature of the laser emitting assembly 20 is heated and compensated to the preset temperature value by the temperature control circuit 30, the main control device 40 controls the temperature control circuit 30 to stop working. It should be noted that the reference temperature must be a value that the wavelength of the 25G optical signal does not exceed the lower limit of the channel wavelength range at the reference temperature; and because the temperature rise needs time, in order to avoid that the wavelength of the 25G optical signal exceeds the lower limit of the channel wavelength range (the temperature drop speed exceeds the heating compensation speed) in the temperature rise, a certain margin value needs to be reserved for the value of the reference temperature. In other alternative embodiments, the temperature detection circuit may also be implemented using a temperature sensor.
In an alternative embodiment, taking 25 ℃ as the normal operating temperature for example, the wavelength of the laser emitting assembly 20 at 25 ℃ is adjusted from 1271nm to 1269nm, which corresponds to a channel wavelength range of (1271+ 6.5-1271-6.5). After adjustment, the residual of 8.5nm exists between 1269nm and 1277.5(1271+6.5) nm, and the wavelength of a 25G optical signal is not overproof before the temperature is 110 ℃ (25 ℃ and 85 ℃) corresponding to the residual of 85 ℃ temperature rise; low temperature conditions 1269nm have a margin of only 4.5nm from the lower limit of the wavelength range 1264.5nm (1271-6.5), corresponding to a 45 ℃ cooling margin, and a temperature change of 65 ℃ from 25 ℃ to-40 ℃, so that from preset temperature values, for example: the heating is started at a temperature below-10 c, so that the temperature of the laser emitting assembly 20 is maintained at a preset temperature value of-10 c, so as to ensure that the wavelength of the 25G optical signal is not reduced at a low temperature. This allows the laser transmitter 22 to emit 25G of optical signals in the temperature range of-40 c to 110 c without exceeding the wavelength range of the channel.
The utility model discloses industrial-grade optical module is through setting up electrical interface 10, laser emission subassembly 20, temperature control circuit 30 and master control set 40 to through adjustment laser emission subassembly 20, make laser emission subassembly 20 can convert the electric signal that electrical interface 10 inserts into the optical signal output that the wavelength is less than typical value, take place the wavelength surplus of skew in order to enlarge the laser wavelength of optical signal when high temperature, thereby enlarged the temperature upper limit that optical signal takes place the high temperature skew; and detecting the real-time working temperature of the laser emitting assembly 20 through the main control device 40, and controlling the temperature control circuit 30 to increase the working temperature of the laser emitting assembly 20 according to the detection result so as to counteract the influence of the low-temperature environment on the optical signal. The utility model discloses industrial-grade optical module is through adjusting the wavelength that laser emission subassembly 20 exported optical signal to make the optical signal wavelength when high temperature, can not surpass the upper limit of passageway wavelength range, and utilize the temperature control circuit 30 that the temperature detection function of master control set 40 and simple device found, rise the temperature of laser emission subassembly 20 when low temperature, thereby can be under the prerequisite that does not use the TEC scheme, realize industrial-grade temperature control, and the adjustment process of wavelength takes place in the normal manufacturing process of laser emission subassembly 20, need not to increase extra adjustment cost; compared with the TEC scheme, a complex control circuit is not required to be added, the system cost is greatly reduced, the power consumption of the system is reduced when the temperature rise process is only carried out at low temperature, the large-scale deployment of the 5G base station is facilitated, the upper limit of the high temperature can be selected according to actual needs, and vicious circle caused by high-temperature refrigeration can be avoided.
Referring to fig. 1 to 4, in an 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;
the laser driver 21 is configured to drive the laser emitter 22 to convert an electrical signal into an optical signal and output the optical signal according to the electrical signal input by the electrical interface 10 under the control of the main control device 40;
the main control device 40 is configured to detect an operating temperature of the laser transmitter 22 as an operating temperature of the laser emitting assembly 20.
In this embodiment, the laser driver 21 may be implemented by a laser driving circuit, and the laser emitter 22 may be implemented by an FP semiconductor laser chip or a DFP semiconductor laser chip; the laser driver 21 is configured to control the corresponding electronic device to operate in an optimal operating interval according to various control signals output by the main control device 40, so that the 25G electrical signals can be accessed at different times according to the electrical interface 10 to drive the laser transmitter 22 to emit corresponding laser light, so as to implement conversion from the 25G electrical signals to the 25G optical signals. It is understood that when the laser transmitter 22 employs a DFP semiconductor laser chip, a person skilled in the art can change the grating-forming optical coupling by adjusting the pitch between the gratings in the fabrication process to adjust the wavelength of the 25G optical signal to be below the typical value of the channel center wavelength (the principle of FP semiconductor laser chips: outputting laser light by exciting a semiconductor substance to emit light in transition between energy bands and oscillating the light using a resonant cavity, feeding back and generating radiation amplification, the DFP semiconductor laser chip being oscillated instead of the grating-forming optical coupling). Of course, in alternative embodiments, laser wavelength adjustment may also be achieved 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.
The influence of the ambient temperature is reflected in the shift of the wavelength of the 25G optical signal, so the master control device 40 detects the temperature of the laser emitter 22 as the ambient temperature of the 25G optical signal. It is understood that the master control device 40 can also detect the temperature of other components, such as the temperature of the laser driver 21, and accordingly calculate the ambient temperature of the 25G optical signal. By adjusting the wavelength in the normal manufacturing process of the laser emitter 22, additional adjustment cost is not required, the upper limit of the temperature can be flexibly adjusted according to actual needs, and the method is favorably applied to various use scenes of 5G.
Referring to fig. 1 to 4, in an embodiment of the present invention, the temperature control circuit 30 further includes a constant current source circuit, connected to the resistor element R1, for providing a constant current source to control the resistor element R1 to perform heating operation.
The constant current source circuit comprises an operational amplifier U1, a current limiting resistor R2 and a switching tube T1; the non-inverting end of the operational amplifier U1 and one end of the resistor element R1 are connected with each other and then electrically connected with the master control device 40, and the output end of the operational amplifier U1 is connected with the controlled end of the switch tube T1; the input end of the switch tube T1 is connected with the other end of the resistor element R1, and the output end of the switch tube T1 is connected with one end of the current-limiting resistor R2; the other end of the current limiting resistor R2 is grounded; the output end of the operational amplifier U1 is connected with the common end of the switch tube T1 and the current limiting resistor R2.
In this embodiment, the constant current source circuit may be constructed by using a switching device, a resistance element, and an operational amplifier, where the switching device may be one or a combination of a triode, an MOS transistor, and an IGBT. The constant current source circuit can make the current flowing through the resistance element for heating compensation constant according to the temperature control signal output by the main control device 40, so that the resistance element can perform corresponding heating compensation according to the detection result of the main control device 40; specifically, in the process that the main control device 40 detects that the working temperature of the laser emitting assembly 20 is from the reference temperature to-40 ℃, when the working temperature is closer to-40 ℃, the constant current source circuit makes the current value flowing through the resistor larger according to the received temperature control signal, so that the heat generated by the resistor is also larger; the value of the current flowing through the temperature sensor is made smaller as the operating temperature is closer to the reference temperature, and is made 0 when the temperature is equal to the reference temperature.
Since the value of the current flowing through the resistance element R1 is I ═ V/R2The heating value of the resistance element can be calculated by the formula Q ═ I2R1Therefore, the main control device 40 can control the heat generated by the resistor element R1 by controlling the voltage values output to one end of the resistor element R1 and the non-inverting end of the operational amplifier U1. Of course, in alternative embodiments, the constant current source circuit may be implemented by other circuit structures. By constructing the temperature control circuit 30 using the constant current source circuit and the resistance element R1, the main control device 40 can control the temperature compensated by the resistance element R1 by controlling the voltage.
Referring to fig. 1 to 4, in an 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 master control device 40 and the limiting amplifier 60 respectively;
the laser receiver 50 is configured to access an optical signal, and is configured to convert the optical signal into an electrical signal and output the electrical signal to the limiting amplifier 60; the limiting amplifier 60 is configured 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 and amplifying.
In this embodiment, the laser receiver 50 may be implemented by a photosensitive device such as an avalanche photodiode, and the limiting amplifier 60 may be implemented by a limiting amplifier circuit. The laser receiver 50 changes the current flowing through it when receiving the optical signal, thereby converting the 25G optical signal into a 25G electrical signal. The amplitude limiting amplification circuit is used for outputting the 25G electric signal obtained by the conversion of the laser receiver 50 after amplitude limiting amplification, specifically, when the signal amplitude of the 25G electric signal received by the amplitude limiting amplifier 60 is normal, the amplitude limiting amplifier 60 works in a linear working area, and the 25G electric signal is output after being amplified; when the signal amplitude of the 25G electrical signal exceeds the upper limit level, the limiting amplifier 60 operates in the nonlinear operating region, and the limiting amplifier 60 outputs an upper limit electrical signal. At this time, the main control device 40 may detect the rate of the electrical signal input to the limiting amplifier 60 through the corresponding detection port, and may adjust the amplification factor and the upper limit level of the limiting amplifier 60 through the corresponding control port, so that the operating state of the limiting amplifier 60 may be matched to the rate of the electrical signal. Through setting up the light receiving component, make the utility model discloses industrial grade optical module still has the function of receiving optical signal to through setting up limiting amplifier 60, can carry out preliminary treatment to the signal of telecommunication of optical signal conversion.
Referring to fig. 1 to 4, in an embodiment of the present invention, the industrial-grade optical module further includes a transmit signal shaping circuit 70 and a receive signal shaping circuit 80;
the emission signal shaping circuit 70 is electrically connected to the electrical interface 10, the laser driver 21 and the master control device 40 respectively; the emission signal shaping circuit 70 is configured to shape an electrical signal accessed by the electrical interface 10 under the control of the master control device 40, and output the shaped electrical signal to the laser driver 21;
the received signal shaping circuit 80 is electrically connected to the limiting amplifier 60, the electrical interface 10, and the master control device 40, respectively; the received signal shaping circuit 80 is configured to shape the electrical signal output by the limiting amplifier 60 after limiting and amplifying under the control of the main control device 40, and output the shaped electrical signal to the electrical interface 10.
In this embodiment, the transmit signal shaping circuit 70 and the receive signal shaping circuit 80 can both be implemented by using a CDR clock data recovery circuit. Both the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 can be used to shape the received electrical signal and output the shaped electrical signal, so that the shaped 25G electrical signal meets the transmission requirement of the subsequent functional module. For example, the transmit signal shaping circuit 70 and the receive signal shaping circuit 80 may extract a corresponding data sequence from the input 25G electrical signal according to a corresponding reference clock, and recover the data sequence to a corresponding clock signal, so as to convert the 25G electrical signal into a clock signal form, and perform corresponding shaping processing such as phase adjustment and jitter reduction on the 25G electrical signal in the clock signal form through data alignment, so as to improve the signal quality and make the signal meet the corresponding transmission requirements.
In this embodiment, the master control device 40 may further detect the rates of the electrical signals input to the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 through the corresponding ports, respectively, and configure the operating states 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 processes thereof may be matched with the rates of the electrical signals, and the reference clock may be output by the master control device 40 according to the detection results. It is understood that the master control device 40 can also control the opening and bypassing of the transmit signal shaping circuit 70 and the receive signal shaping circuit 80 to achieve compatible transmission of the high-rate electrical signal and the low-rate electrical signal. The stability of the 25G electrical signal can be improved by providing the transmit signal shaping circuit 70 and the receive signal shaping circuit 80, which is beneficial to increasing the effective distance of signal transmission.
Referring to fig. 1 to 4, in an 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 master 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;
the electrical interface 10 is also used for accessing a power supply signal;
the power management circuit 90 is configured to, under the control of the main control device 40, output power signals accessed by the electrical interface 10 to the laser transmitter 22, the laser driver 21, the laser receiver 50, and the limiting amplifier 60 after corresponding voltage conversion, so as to supply power to the laser transmitter 22, the laser driver 21, the laser receiver 50, and the limiting amplifier 60, respectively.
In this embodiment, the power management circuit 90 may be implemented by a multi-channel DC-DC circuit or a power management integrated circuit. The electrical interface 10 is further configured to receive a dc voltage to provide a power supply voltage for the operation of the optical module. In an alternative embodiment, the power supply terminals of the master control device 40, the transmission signal shaping circuit 70 and the reception signal shaping circuit 80 are respectively connected to the electrical interface 10, and the direct-current voltage accessed by the electrical interface 10 directly supplies power. 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 result of the other functional circuits, so as to provide a suitable operating voltage for the functional module or the components in the circuit. In other optional embodiments, the power management circuit 90 further has a power-on slow start function, so as to control a power-on timing sequence of each functional circuit in the optical module at a power-on initial stage of the optical module, so as to avoid damage to each circuit caused by a power-on impact current. It can be understood that the main control device 40 can also be used to detect the working voltages of the functional circuits in the optical module, and output corresponding control signals to the power management circuit 90 when detecting that the working voltages of the functional circuits are over-voltage or under-voltage, so as to control the power management circuit 90 to cut off the power supply of the circuit. By arranging the power management circuit 90, each functional module in the optical module can work in a proper working interval, so that the overall loss of the optical module is reduced.
Referring to fig. 1 to 4, in an embodiment of the present invention, the industrial-grade optical module further includes:
the electrical interface 10, the master control device 40, the laser driver 21, the temperature control circuit 30, the limiting amplifier 60 and the power management circuit 90 are disposed on the printed circuit board; and
the printed circuit board is accommodated in the shell; the shell corresponds laser driver 21, laser emitter 22, limiting amplifier 60 and laser receiver 50 has protruding connecting portion that has stretched respectively, just laser driver 21, laser emitter 22, limiting amplifier 60 and laser receiver 50 sets up with the laminating of the connecting portion that corresponds respectively, in order to transmit the heat extremely the shell.
In this embodiment, the housing may be made of a high thermal conductive material, and the printed circuit board may be a printed circuit board with a high TG value. The laser driver 21, the laser transmitter 22, the limiting amplifier 60 and the laser receiver 50 in the optical module are devices which have large heat productivity and are sensitive to temperature; therefore, the outer shell enhances the heat dissipation capability of the device at high temperature by increasing the bonding area of the device. In other alternative embodiments, EMI (electromagnetic interference) materials may also be used in the package in the device to ensure the stability of the EMI characteristics of the device. By adopting the shell with high heat conduction material and the printed circuit board with high TG value, each functional circuit in the optical module can work normally at high temperature.
The utility model also provides an optical fiber communication device, which comprises a wavelength division multiplexer, a wavelength division demultiplexer and the industrial optical module;
the wavelength division multiplexer is connected with the laser transmitter 22 and is used for outputting the optical signal output by the laser transmitter 22 after wavelength division multiplexing;
the wavelength division demultiplexer is connected to the laser receiver 50, and is configured to access an optical signal, and output the accessed optical signal to the laser receiver 50 after decomposition and multiplexing.
The optical fiber communication equipment comprises the industrial-grade optical module; the detailed structure of the industrial-grade optical module can refer to the above embodiments, and is not described herein again; it can be understood that, because the industrial-grade optical module is used in the optical fiber communication device, the embodiment of the optical fiber communication device includes all technical solutions of all embodiments of the industrial-grade optical module, and the achieved technical effects are also completely the same, and are not described herein again.
In this embodiment, the optical fiber communication device may be configured to access multiple electrical signals, and the optical fiber communication device is correspondingly provided with a plurality of laser emitters 22, where the plurality of laser emitters 22 are configured to convert the multiple electrical signals into corresponding optical signals respectively and output the optical signals to the wavelength division multiplexer, so as to output the multiple optical signals through optical fibers after performing wavelength division multiplexing, thereby improving the utilization rate of the optical fibers; it is understood that, when the optical fiber communication device receives the wavelength division multiplexed optical signal through the optical fiber, the wavelength division demultiplexer may decompose the wavelength division multiplexed optical signal into corresponding optical signals and output the optical signals to the corresponding laser receivers 50, so as to convert the optical signals into corresponding electrical signals and output the electrical signals.
The utility model also provides an optical fiber communication system, the optical fiber communication system includes optical signal transceiver and the industrial optical module as above, the optical signal transceiver and the industrial optical module are connected through optical fiber communication;
or, the optical fiber communication system comprises an optical signal transceiver and the above optical fiber communication device; the optical signal transceiver is in communication connection with the industrial-grade optical module in the optical fiber communication equipment through optical fibers.
The optical fiber communication system comprises the industrial optical module; the detailed structure of the industrial-grade optical module can refer to the above embodiments, and is not described herein again; it can be understood that, because the 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 industrial-grade optical module, and the achieved technical effects are also completely the same, and are not described herein again. The optical fiber communication system may further include the above optical fiber communication device, which is already described above and will not be further described herein.
In this embodiment, can be according to actual need corresponding being provided with a plurality ofly among the optical fiber communication system the utility model discloses industrial grade optical module or a plurality of optical fiber communication equipment, accessible fiber connection is in order to carry out fiber communication each other.
The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.
Claims (10)
1. An industrial grade light module, comprising:
the electrical interface is used for accessing an electrical signal;
the laser emission component is connected with the electrical interface and used for converting the electrical signal accessed by the electrical interface into an optical signal with the wavelength lower than a preset typical value and outputting the optical signal;
the temperature control circuit comprises a resistance element for heating compensation of the laser emitting assembly; and
the main control device is electrically connected with the laser emission assembly and the temperature control circuit respectively;
the main control device is used for detecting the working temperature of the laser emission assembly and outputting a corresponding temperature control signal to the temperature control circuit according to the working temperature of the laser emission assembly, so that the temperature control circuit can drive the resistance element to heat and compensate the laser emission assembly according to the received temperature control signal.
2. The industrial-grade optical module according to claim 1, wherein the laser emitting component comprises a laser driver and a laser emitter, and the laser driver is electrically connected to the electrical interface, the master control device and the laser emitter respectively;
the laser driver is used for driving the laser transmitter to convert an electric signal into an optical signal and output the optical signal according to the electric signal input by the electric interface under the control of the main control device;
the main control device is used for detecting the working temperature of the laser transmitter to serve as the working temperature of the laser transmitting assembly.
3. The industrial grade light module of claim 2 wherein the temperature control circuit further comprises a constant current source circuit connected to the resistive element for providing a constant current source to control the resistive element to perform the heating operation.
4. The industrial-grade optical module according to claim 3, wherein the constant current source circuit comprises an operational amplifier, a current limiting resistor and a switch tube; the in-phase end of the operational amplifier and one end of the resistance element are connected with each other and then electrically connected with the main control device, and the output end of the operational amplifier is connected with the controlled end of the switching tube; the input end of the switch tube is connected with the other end of the resistor element, and the output end of the switch tube is connected with one end of the current-limiting resistor; the other end of the current limiting resistor is grounded; and the output end of the operational amplifier is connected with the common end of the switching tube and the current-limiting resistor.
5. The industrial grade light module of claim 2 further comprising: a laser receiver and a limiting amplifier; the limiting amplifier is electrically connected with the electrical interface, the master control device and the limiting amplifier respectively;
the laser receiver is used for accessing an optical signal, converting the optical signal into an electric signal and outputting the electric signal to the limiting amplifier; and the limiting amplifier is used for outputting the electric signal output by the laser receiver to the electric interface after limiting and amplifying under the control of the main control device.
6. The optical module of claim 5, wherein the optical module further comprises a transmit signal shaping circuit and a receive signal shaping circuit;
the emission signal shaping circuit is respectively and electrically connected with the electrical interface, the laser driver and the master control device; the emission signal shaping circuit is used for shaping the electric signal accessed by the electric interface under the control of the main control device and outputting the shaped electric signal to the laser driver;
the receiving signal shaping circuit is respectively and electrically connected with the limiting amplifier, the electrical interface and the master control device; and the received signal shaping circuit is used for shaping the electric signal output by the amplitude limiting amplifier after amplitude limiting amplification under the control of the main control device and outputting the shaped electric signal to the electric interface.
7. The industrial grade light module of claim 6 further comprising a power management circuit; the power management circuit is respectively and electrically connected with the master control device, the electrical interface, the laser transmitter, the laser driver, the laser receiver and the limiting amplifier;
the electrical interface is also used for accessing a power supply signal;
the power management circuit is used for respectively outputting the power signals accessed by the electrical interface to the laser transmitter, the laser driver, the laser receiver and the limiting amplifier after corresponding voltage conversion under the control of the main control device so as to respectively supply power for the laser transmitter, the laser driver, the laser receiver and the limiting amplifier.
8. The industrial grade light module of claim 7 further comprising:
the electrical interface, the master control device, the laser driver, the temperature control circuit, the limiting amplifier and the power management circuit are arranged on the printed circuit board; and
the printed circuit board is accommodated in the shell; the shell corresponds to the laser driver, the laser transmitter, the limiting amplifier and the laser receiver and is respectively provided with a connecting part in a protruding mode, and the laser driver, the laser transmitter, the limiting amplifier and the laser receiver are attached to the corresponding connecting parts respectively to transfer heat to the shell.
9. An optical fiber communication device, characterized in that the optical fiber communication device comprises a wavelength division multiplexer, a wavelength division demultiplexer and the industrial optical module according to any one of claims 5 to 8;
the wavelength division multiplexer is connected with the laser transmitter and is used for outputting optical signals output by the laser transmitter after wavelength division multiplexing;
the wavelength division demultiplexer is connected with the laser receiver and used for accessing optical signals and outputting the accessed optical signals to the laser receiver after decomposition and multiplexing.
10. An optical fiber communication system, characterized in that the optical fiber communication system comprises an optical signal transceiver and the industrial-grade optical module according to any one of claims 1 to 8, wherein the optical signal transceiver is connected with the industrial-grade optical module through optical fiber communication;
alternatively, the optical fiber communication system comprises an optical signal transceiver and the optical fiber communication device according to claim 9; the optical signal transceiver is in communication connection with the industrial-grade optical module in the optical fiber communication equipment through optical fibers.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021741886.2U CN213690019U (en) | 2020-08-18 | 2020-08-18 | Industrial optical module, optical fiber communication equipment and optical fiber communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021741886.2U CN213690019U (en) | 2020-08-18 | 2020-08-18 | Industrial optical module, optical fiber communication equipment and optical fiber communication system |
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| CN213690019U true CN213690019U (en) | 2021-07-13 |
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| CN202021741886.2U Active CN213690019U (en) | 2020-08-18 | 2020-08-18 | Industrial optical module, optical fiber communication equipment and optical fiber communication system |
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| Country | Link |
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| CN (1) | CN213690019U (en) |
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