CN109831256B - Optical module and optical communication device - Google Patents
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Abstract
The invention provides an optical module and optical communication equipment, and relates to the technical field of optical communication, wherein the optical module comprises a compatible circuit, a control chip, a driving chip and an optical device; the compatible circuit is respectively connected with the control chip and the driving chip, and the driving chip is also respectively connected with the control chip and the optical device; the compatible circuit comprises an interconnected gateway interface and a coupling circuit, wherein the coupling circuit comprises an interconnected coupling switch and an alternating current coupling element; the control chip is used for controlling the working state of the coupling switch so as to enable or disable the alternating current coupling element; the control chip is also used for sending a coupling control instruction to the driving chip so that the driving chip drives the optical device to emit light in a target coupling mode corresponding to the coupling control instruction. Therefore, the optical module can be compatible with gateway equipment in different coupling modes by controlling the coupling circuit and the driving chip through the control chip, so that the difficulty and the cost of production management are reduced, and the situation of inventory accumulation of the optical module is relieved.
Description
Technical Field
The present invention relates to the field of optical communications technologies, and in particular, to an optical module and an optical communications device.
Background
The optical module is connected with the gateway equipment, and the optical module is used for performing photoelectric conversion On an electric signal transmitted by the gateway equipment or a received optical signal, and has optional functions such as Tx_SD (transmitted signal intensity detection), burst On (Burst enable), rx_SD (received signal intensity detection) and the like. The optical module of the GPON (Gigabit-Capable Passive Optical Network, passive optical access system) or the EPON (Ethernet Passive Optical Network ) ONU (Optical Network Unit, optical network unit) is applied to the point-to-multipoint or Gigabit passive optical network Ethernet user end, the transmission distance reaches 20Km, the optical module conforms to various international related protocols, the metal shell of the optical module ensures that the optical module has good EMI (Electromagnetic Interference ) and EMC (Electro Magnetic Compatibility, electromagnetic compatibility) characteristics, and the optical module has numerous advantages of high bandwidth, high efficiency, large coverage, rich user interfaces and the like.
The electrical signal transmitted by the gateway device generally has two modes of ac coupling and dc coupling, so that the input end of the corresponding gateway device of the optical module generally adopts a coupling capacitor or a coupling resistor to match the transmission characteristic of the gateway device.
At present, existing low-speed ONU (GPON ONU and EPON ONU) optical modules include optical modules with two coupling modes: the direct current coupling optical module and the alternating current coupling optical module are produced respectively according to the order requirement during production. However, this not only increases the difficulty and cost of production management, but also tends to result in stacking of inventory.
Disclosure of Invention
The invention aims to provide an optical module and optical communication equipment so as to improve the compatibility of the optical module on different gateway equipment and reduce the difficulty and cost of production management.
The invention provides an optical module, which comprises a compatible circuit, a control chip, a driving chip and an optical device, wherein the compatible circuit is connected with the control chip; the compatible circuit is respectively connected with the control chip and the driving chip, and the driving chip is also respectively connected with the control chip and the optical device; the compatible circuit comprises a gateway interface and a coupling circuit, wherein the gateway interface is used for connecting a transmitting end of gateway equipment, and the coupling circuit comprises a coupling switch and an alternating current coupling element which are connected with each other; the control chip is used for controlling the working state of the coupling switch so as to enable or disable the alternating current coupling element; the control chip is also used for sending a coupling control instruction to the driving chip so that the driving chip drives the optical device to emit light in a target coupling mode corresponding to the coupling control instruction; the target coupling mode comprises direct current coupling or alternating current coupling.
Further, the coupling switch comprises a first coupling switch and a second coupling switch; the first end of the first coupling switch is connected with the gateway interface through the alternating current coupling element, the second end of the first coupling switch is connected with the driving chip, and the control end of the first coupling switch is connected with the control chip; the first end of the second coupling switch is connected with the gateway interface, the second end of the second coupling switch is connected with the driving chip, and the control end of the second coupling switch is connected with the control chip.
Further, the first end of the second coupling switch is connected with the gateway interface through a direct current coupling element.
Further, the coupling switch comprises a MOS tube, the alternating current coupling element comprises a coupling capacitor, and the direct current coupling element comprises a coupling resistor.
Further, the compatible circuit further comprises a detection circuit and a bias circuit which are connected with the gateway interface, and the detection circuit and the bias circuit are respectively connected with the control chip; the detection circuit is used for detecting the working voltage of the transmitting end connected with the gateway interface and sending the working voltage to the control chip; and the control chip is used for starting the bias circuit when the working voltage is smaller than a preset voltage threshold value.
Further, the detection circuit comprises an analog-to-digital converter, and the control chip comprises a micro control unit MCU.
Further, the model of the analog-to-digital converter includes AMC7820, and the model of the MCU includes EFM8BB21F16G.
Further, the bias circuit comprises a first resistor, a second resistor and a bias switch, wherein the resistance value of the first resistor is different from that of the second resistor; the first end of the first resistor is connected with the first end of the second resistor, and the second end of the first resistor and the second end of the second resistor are respectively connected with the control chip; the first end and the second end of the bias switch are respectively connected with the gateway interface and the common end of the first resistor and the common end of the second resistor, and the control end of the bias switch is connected with the control chip; the control chip is used for controlling the bias switch to be conducted when the bias circuit is started, and controlling the level of the second end of the first resistor and the level of the second end of the second resistor according to the target coupling mode.
Further, the resistance value of the first resistor is smaller than the resistance value of the second resistor, and the control chip is specifically configured to control the second end of the first resistor to be at a high level and control the second end of the second resistor to be at a low level when the target coupling mode is ac coupling; and when the target coupling mode is direct current coupling, controlling the second end of the first resistor to be at a low level and controlling the second end of the second resistor to be at a high level.
The invention also provides optical communication equipment, which comprises the optical module and gateway equipment; and the transmitting end of the gateway equipment is connected with the optical module.
The optical module provided by the invention comprises a compatible circuit, a control chip, a driving chip and an optical device; the compatible circuit is respectively connected with the control chip and the driving chip, and the driving chip is also respectively connected with the control chip and the optical device; the compatible circuit comprises an interconnected gateway interface and a coupling circuit, wherein the gateway interface is used for connecting the transmitting end of the gateway equipment, and the coupling circuit comprises an interconnected coupling switch and an alternating current coupling element; the control chip is used for controlling the working state of the coupling switch so as to enable or disable the alternating current coupling element; the control chip is also used for sending a coupling control instruction to the driving chip so that the driving chip drives the optical device to emit light in a target coupling mode corresponding to the coupling control instruction; the target coupling mode comprises direct current coupling or alternating current coupling. According to the optical module and the optical communication equipment, the control chip is used for controlling the coupling circuit and the driving chip, so that the optical module can be compatible with gateway equipment in different coupling modes, namely, the compatibility of the optical module on different gateway equipment is improved, the difficulty and the cost of production management are reduced, and the inventory accumulation situation of the optical module is relieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an optical module according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a coupling circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another optical module according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram of an optical module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optical communication device according to an embodiment of the present invention.
Icon: a 100-compatible circuit; 101-a gateway interface; 102-a coupling circuit; 103-a detection circuit; 104-a bias circuit; 200-a control chip; 300-driving a chip; 400-optical device; 10-an optical module; 20-gateway device.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, only one coupling mode can be adopted for the optical module, and the optical module can be divided into a direct current coupling optical module and an alternating current coupling optical module. If the ac coupling optical module adopts a dc transmission mode, it will not work normally, otherwise, if the dc coupling optical module adopts an ac transmission mode, it will not work normally. Therefore, the direct current coupling optical module and the alternating current coupling optical module are generally produced according to the requirements at present, however, the difficulty and the cost of production management are increased, and stock accumulation is easy to cause. Based on the above, the embodiment of the invention provides an optical module and an optical communication device, wherein the optical module can be compatible with gateway devices with different coupling modes, so that convenience is brought to production, the manufacturing cost is reduced, and the coupling mode of the produced optical module can be modified according to the requirement, thereby avoiding the waste of produced inventory.
For the sake of understanding the present embodiment, first, a detailed description is given of an optical module disclosed in the present embodiment.
Fig. 1 is a schematic structural diagram of an optical module according to an embodiment of the present invention, and as shown in fig. 1, the optical module includes a compatible circuit 100, a control chip 200, a driving chip 300, and an optical device 400; the compatible circuit 100 is connected to the control chip 200 and the driving chip 300, respectively, and the driving chip 300 is also connected to the control chip 200 and the optical device 400, respectively.
Specifically, the compatible circuit 100 includes an interconnected gateway interface 101 and a coupling circuit 102, the gateway interface 101 being for connecting to a transmitting end of a gateway device, the coupling circuit 102 including an interconnected coupling switch and an ac coupling element. The control chip 200 is used to control the operating state of the coupling switch to enable or disable the ac coupling element. The control chip 200 is further configured to send a coupling control instruction to the driving chip 300, so that the driving chip 300 drives the optical device 400 to emit light in a target coupling manner corresponding to the coupling control instruction; the target coupling mode comprises direct current coupling or alternating current coupling.
The coupling mode of the optical module can be selected according to the need, and the optical module controls the coupling circuit 102 to select to use direct current coupling or alternating current coupling through the control chip 200, for example, the optical module can be selected by burning firmware or other modes, and can also be selected by a user (user). The driving chip 300 may also be referred to as an LDD (Laser diode Driver ), and the optical device 400 may also be referred to as a BOSA (Bi-Directional Optical Sub-Assembly). The corresponding relation between the coupling control instruction and the target coupling mode is written in the register of the driving chip 300 in advance, for example, the coupling control instruction includes 0 and 1,0 corresponding to direct current coupling, and 1 corresponding to alternating current coupling, so that the driving chip 300 can drive the optical device 400 to emit light according to the target coupling mode corresponding to the coupling control instruction.
In an alternative implementation, after the user determines the coupling mode according to the need, the determined target coupling mode may be sent to the control chip 200 through an input device, where the input device may be a button, a keyboard, a touch screen, or the like, and is not limited herein. After receiving the signal indicating the target coupling mode, the control chip 200 controls the operating states of the coupling circuit 102 and the driving chip 300 according to the target coupling mode. Specifically, when the target coupling mode is dc coupling, the control chip 200 controls the coupling switch to be in a first working state, and the ac coupling element does not work in the first working state, and simultaneously controls the driving chip 300 to drive the optical device 400 to emit light by adopting dc coupling; when the target coupling mode is ac coupling, the control chip 200 controls the coupling switch to be in a second working state, and the ac coupling element works in the second working state, and simultaneously controls the driving chip 300 to drive the optical device 400 to emit light by adopting ac coupling.
In the embodiment of the invention, the optical module comprises a compatible circuit, a control chip, a driving chip and an optical device; the compatible circuit is respectively connected with the control chip and the driving chip, and the driving chip is also respectively connected with the control chip and the optical device; the compatible circuit comprises an interconnected gateway interface and a coupling circuit, wherein the gateway interface is used for connecting the transmitting end of the gateway equipment, and the coupling circuit comprises an interconnected coupling switch and an alternating current coupling element; the control chip is used for controlling the working state of the coupling switch so as to enable or disable the alternating current coupling element; the control chip is also used for sending a coupling control instruction to the driving chip so that the driving chip drives the optical device to emit light in a target coupling mode corresponding to the coupling control instruction; the target coupling mode comprises direct current coupling or alternating current coupling. According to the optical module and the optical communication equipment, the control chip is used for controlling the coupling circuit and the driving chip, so that the optical module can be compatible with gateway equipment in different coupling modes, namely, the compatibility of the optical module on different gateway equipment is improved, the difficulty and the cost of production management are reduced, and the inventory accumulation situation of the optical module is relieved.
Optionally, in a specific implementation, the coupling switch includes a first coupling switch and a second coupling switch; a first end of the first coupling switch is connected with the gateway interface 101 through an alternating current coupling element, a second end of the first coupling switch is connected with the driving chip 300, and a control end of the first coupling switch is connected with the control chip 200; the first end of the second coupling switch is connected with the gateway interface 101, the second end of the second coupling switch is connected with the driving chip 300, and the control end of the second coupling switch is connected with the control chip 200. It should be noted that the positions of the first coupling switch and the ac coupling element may be interchanged.
When the optical module works, the working states of the first coupling switch and the second coupling switch are opposite: when the first coupling switch is turned on, the second coupling switch is turned off; when the first coupling switch is turned off, the second coupling switch is turned on, so that only one path exists between the transmitting end of the gateway device and the driving chip 300 in the working process of the optical module. Specifically, the first coupling switch is used for controlling the working state of the alternating-current coupling element, the alternating-current coupling element works when the first coupling switch is on, and the alternating-current coupling element does not work when the first coupling switch is off. The second coupling switch is used for being conducted when the first coupling switch is in a cut-off state so as to connect the transmitting end of the gateway equipment with the driving chip 300, and the optical module is coupled by direct current; the first coupling switch is turned off when in an on state, so that the optical module adopts alternating current coupling.
Optionally, in order to better match the transmission characteristics of the gateway device, the first end of the second coupling switch is connected to the gateway interface 101 through a dc coupling element. The second coupling switch is used for controlling the working state of the direct current coupling element, the direct current coupling element works when the second coupling switch is conducted, and the direct current coupling element does not work when the second coupling switch is cut off. By providing a dc coupling element, the optical module can better match the transmission characteristics of the gateway device.
Optionally, the coupling switch includes a MOS (metal oxide semiconductor ) tube, the ac coupling element includes a coupling capacitor, and the dc coupling element includes a coupling resistor. The MOS tube can be an NMOS tube or a PMOS tube, and the type of the MOS tube is not limited as long as the MOS tube which can play a role of a switch can be used.
Based on the above, in order to facilitate understanding, the embodiment of the present invention discloses a circuit structure of a coupling circuit, referring to a schematic circuit structure of a coupling circuit shown in fig. 2, the coupling circuit 102 is composed of a first coupling unit corresponding to an anode and a second coupling unit corresponding to a cathode, the first coupling unit includes a resistor R103, a capacitor C1, and NMOS transistors Q2 and Q3, the second coupling unit includes a resistor R104, a capacitor C2, and NMOS transistors Q4 and Q5, where the resistor R103 and the resistor R104 are coupling resistors (in practical application, r103=r104=0Ω may be selected), the capacitor C1 and the capacitor C2 are coupling capacitors, the NMOS transistors Q2 and Q5 are first coupling switches, and the NMOS transistors Q3 and Q4 are second coupling switches. Before the optical module starts to work, a working coupling mode is selected firstly, when direct current coupling is used, the control chip 200 controls the C end to enable the NMOS transistors Q3 and Q4 to be conducted, the NMOS transistors Q2 and Q5 are in a cut-off state, and the resistors R103 and 104 start to work, namely the resistors R103 and 104 are used for communication; when ac coupling is used, the control chip 200 controls the terminal B to turn on the NMOS transistors Q2 and Q5, and the transistors Q3 and Q4 are turned off, so that the capacitors C1 and C2 start to operate, i.e., the capacitors C1 and C2 are used for communication.
In this embodiment, the control chip 200 controls the NMOS transistors Q2, Q3, Q4, and Q5, so that the optical module adopts a corresponding coupling mode during operation. In particular, the gates of the NMOS transistors Q2, Q5 are connected together and controlled by the control chip 200, and the gates of the NMOS transistors Q3, Q4 are also connected together and controlled by the control chip 200. Thus, the coupling circuit 102 is conveniently connected with the control chip 200, and the control chip 200 is also convenient for controlling the NMOS transistors Q2, Q3, Q4 and Q5.
Considering that gateway devices developed by current clients are various, some gateway devices are inside a transmitting end and do not have pull-up and pull-down resistors matched with the transmission characteristics of optical modules, so that the optical modules cannot be used on the gateway devices. Referring to the schematic structural diagram of another optical module shown in fig. 3, on the basis of the above embodiment, the compatible circuit 100 further includes a detection circuit 103 and a bias circuit 104, both of which are connected to the gateway interface 101, and the detection circuit 103 and the bias circuit 104 are further connected to the control chip 200, respectively; the detection circuit 103 is configured to detect an operating voltage of a transmitting end connected to the gateway interface 101, and send the operating voltage to the control chip 200; the control chip 200 is configured to enable the bias circuit 104 when the operating voltage is less than a preset voltage threshold.
The voltage threshold and the rated operation of the optical moduleVoltage V cc In connection with, for example, setting the voltage threshold to V cc -1.6V. The bias circuit 104 is internally provided with a pull-up resistor for matching transmission characteristics, and the optical module can enable the transmitting end to have bias voltage by enabling the bias circuit 104, so that gateway equipment without bias voltage can be matched.
In this embodiment, the optical module can detect the working voltage of the transmitting end of the gateway device, and determine whether to enable the bias circuit 104 according to the detection result, so that when the client is applied, different types of gateway devices compatible with the client, even some old gateway devices, can be ensured, and the compatibility of the optical module is further improved.
Optionally, referring to a schematic circuit structure of an optical module shown in fig. 4, the detection circuit 103 includes an analog-to-digital converter, and the control chip 200 includes an MCU (Microcontroller Unit, micro control unit).
The analog-to-digital converter is also called an AD converter, and can be, but not limited to, a 12-bit, two-channel, low-power-consumption and successive approximation type analog-to-digital converter, wherein the analog-to-digital converter has high conversion speed and response time of microsecond level. The analog-to-digital converter may be connected to the MCU via an SPI (Serial Peripheral Interface ) bus.
When the control chip 200 starts the detection circuit 103, the analog-to-digital converter collects voltages at points M and N in fig. 4, and transmits collected voltage data to the MCU for processing through the SPI bus. The MCU processes the voltage data sampled by the analog-to-digital converter and compares it with a set decision voltage (voltage threshold) to determine whether to turn on the bias circuit 104. The MCU outputs a high level or a low level according to the result of the judgment, and controls the working state of the bias circuit 104, so as to achieve the effect of compatibility with different gateway devices. When enabled, the AD converter will no longer collect voltage data until the next restart to reduce power consumption.
Optionally, the model of the analog-to-digital converter includes AMC7820, and the model of the MCU includes EFM8BB21F16G.
Alternatively, in a specific implementation, referring to fig. 4, the bias circuit 104 is configured by two bias units, that is, a first bias unit corresponding to the positive electrode and a second bias unit corresponding to the negative electrode, where the first bias unit includes a first resistor (resistor R101), a second resistor (resistor R102), and a bias switch (NMOS tube Q1), and the second bias unit includes a first resistor (resistor R105), a second resistor (resistor R106), and a bias switch (NMOS tube Q6), and the resistance value of the first resistor and the second resistor in each bias unit is different.
The elements in the first bias unit and the second bias unit are corresponding, and the connection relationship between the elements in the first bias unit is described below with reference to fig. 4 by taking the first bias unit as an example: the first end of the resistor R101 is connected to the first end of the resistor R102, the second end (E end) of the resistor R101 and the second end (G end) of the resistor R102 are respectively connected to the MCU, the first end and the second end of the NMOS tube Q1 are respectively connected to the gateway interface 101 (not shown in fig. 4) and the common end of the resistor R101 and the resistor R102, and the control end (a end) of the NMOS tube Q1 is connected to the MCU.
Specifically, when the control chip 200 turns on the detection circuit 103, the analog-to-digital converter collects voltage data of M and N points in fig. 4 at regular time intervals, and sends the collected ADC values to the MCU for processing. The voltages at the M point and the N point can be calculated by the following formula:
wherein U is M The voltage at the point M is indicated,representing ADC value collected by analog-to-digital converter at M point, U N Represents the voltage at point N, +.>Representing the ADC value acquired by the analog-to-digital converter at point N.
MCU judges U M 、U N Whether the following conditions are satisfied or not is used to control the switching (on or off) of the NMOS transistors Q1, Q6 in fig. 4, so as to control the bias circuit 104 to operate:
U M <V cc -1.6V (3)
U N <V cc -1.6V (4)
wherein V is cc Indicating the nominal operating voltage of the optical module.
Further alternatively, referring to fig. 4, the mcu is further configured to control the a terminal and the D terminal to turn on the NMOS transistors Q1 and Q6 when the bias circuit 104 is enabled, and control the level of the E terminal, the F terminal, the G terminal, and the H terminal according to the target coupling manner. Thus, the MCU can control the output form of the bias circuit 104 according to different coupling modes, and the requirement of the AC and DC coupling bias circuit can be met by using the minimum elements.
Specifically, when the resistance of the resistor R101 is smaller than the resistance of the resistor R102, and the resistance of the resistor R105 is smaller than the resistance of the resistor R106 (in practical application, the resistance of each resistor may be selected to be r101=r105=82Ω, r102=r106=130Ω), the MCU is specifically configured to control the E terminal and the F terminal to be high level and control the G terminal and the H terminal to be low level when the target coupling mode is ac coupling; and when the target coupling mode is direct current coupling, controlling the E end and the F end to be low level, and controlling the G end and the H end to be high level.
The present invention is not limited to the above-described embodiments. The invention can be extended to any new feature or any new combination disclosed in this specification, for example, the multiple NMOS transistors in fig. 4 can be integrated NMOS transistors, the integrated NMOS can be integrated with 8 NMOS transistors, the integrated NMOS has small occupied space, and the volume of the optical module can be reduced.
In summary, the embodiment of the invention can realize the compatibility of gateway equipment with different coupling modes by selecting different coupling modes, and can judge whether to start the bias circuit or not by detecting the working voltage of the transmitting end, and automatically change the output form of the bias circuit according to different coupling modes, thereby realizing the compatibility of gateway equipment with different models, and further relieving the high compatibility requirement of the optical module.
The embodiment of the present invention further provides an optical communication device, and referring to a schematic structural diagram of an optical communication device shown in fig. 5, where the optical communication device includes an optical module 10 as in the foregoing embodiment, and further includes a gateway device 20; the transmitting end of the gateway device 20 is connected to the optical module 10.
In the embodiment of the invention, the optical module comprises a compatible circuit, a control chip, a driving chip and an optical device; the compatible circuit is respectively connected with the control chip and the driving chip, and the driving chip is also respectively connected with the control chip and the optical device; the compatible circuit comprises an interconnected gateway interface and a coupling circuit, wherein the gateway interface is used for connecting the transmitting end of the gateway equipment, and the coupling circuit comprises an interconnected coupling switch and an alternating current coupling element; the control chip is used for controlling the working state of the coupling switch so as to enable or disable the alternating current coupling element; the control chip is also used for sending a coupling control instruction to the driving chip so that the driving chip drives the optical device to emit light in a target coupling mode corresponding to the coupling control instruction; the target coupling mode comprises direct current coupling or alternating current coupling. The optical communication equipment provided by the embodiment of the invention enables the optical module to be compatible with gateway equipment with different coupling modes through the control of the control chip on the coupling circuit and the driving chip, namely improves the compatibility of the optical module on different gateway equipment, thereby reducing the difficulty and the cost of production management and relieving the situation of stock accumulation of the optical module.
It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the optical communication device described above may refer to the corresponding process in the foregoing optical module embodiment, which is not described herein again.
The optical communication device provided by the embodiment of the invention has the same technical characteristics as the optical module provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. The optical module is characterized by comprising a compatible circuit, a control chip, a driving chip and an optical device; the compatible circuit is respectively connected with the control chip and the driving chip, and the driving chip is also respectively connected with the control chip and the optical device;
the compatible circuit comprises a gateway interface and a coupling circuit, wherein the gateway interface is used for connecting a transmitting end of gateway equipment, and the coupling circuit comprises a coupling switch and an alternating current coupling element which are connected with each other;
the control chip is used for controlling the working state of the coupling switch so as to enable or disable the alternating current coupling element; the control chip is also used for sending a coupling control instruction to the driving chip so that the driving chip drives the optical device to emit light in a target coupling mode corresponding to the coupling control instruction; the target coupling mode comprises direct current coupling or alternating current coupling.
2. The light module of claim 1, wherein the coupling switch comprises a first coupling switch and a second coupling switch;
the first end of the first coupling switch is connected with the gateway interface through the alternating current coupling element, the second end of the first coupling switch is connected with the driving chip, and the control end of the first coupling switch is connected with the control chip;
the first end of the second coupling switch is connected with the gateway interface, the second end of the second coupling switch is connected with the driving chip, and the control end of the second coupling switch is connected with the control chip.
3. The optical module of claim 2, wherein the first end of the second coupling switch is interfaced with the gateway through a dc coupling element.
4. A light module as recited in claim 3, wherein the coupling switch comprises a MOS transistor, the ac coupling element comprises a coupling capacitor, and the dc coupling element comprises a coupling resistor.
5. The optical module of claim 1, wherein the compatible circuit further comprises a detection circuit and a bias circuit, each connected to the gateway interface, the detection circuit and the bias circuit further being connected to the control chip, respectively;
the detection circuit is used for detecting the working voltage of the transmitting end connected with the gateway interface and sending the working voltage to the control chip; and the control chip is used for starting the bias circuit when the working voltage is smaller than a preset voltage threshold value.
6. The optical module of claim 5, wherein the detection circuit comprises an analog-to-digital converter and the control chip comprises a micro control unit MCU.
7. The optical module of claim 6, wherein the model of the analog-to-digital converter comprises AMC7820 and the model of the MCU comprises EFM8BB21F16G.
8. The optical module of claim 5, wherein the bias circuit comprises a first resistor, a second resistor, and a bias switch, the first resistor having a different resistance than the second resistor;
the first end of the first resistor is connected with the first end of the second resistor, and the second end of the first resistor and the second end of the second resistor are respectively connected with the control chip; the first end and the second end of the bias switch are respectively connected with the gateway interface and the common end of the first resistor and the common end of the second resistor, and the control end of the bias switch is connected with the control chip;
the control chip is used for controlling the bias switch to be conducted when the bias circuit is started, and controlling the level of the second end of the first resistor and the level of the second end of the second resistor according to the target coupling mode.
9. The optical module according to claim 8, wherein the resistance of the first resistor is smaller than the resistance of the second resistor, and the control chip is specifically configured to control the second end of the first resistor to be at a high level and control the second end of the second resistor to be at a low level when the target coupling mode is ac coupling; and when the target coupling mode is direct current coupling, controlling the second end of the first resistor to be at a low level and controlling the second end of the second resistor to be at a high level.
10. An optical communication device comprising an optical module according to any of the preceding claims 1-9, further comprising a gateway device; and the transmitting end of the gateway equipment is connected with the optical module.
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| CN101285875A (en) * | 2007-04-10 | 2008-10-15 | 扬智科技股份有限公司 | Detection circuit and alternating-current /direct current coupling configuration checking method |
| CN206820248U (en) * | 2017-03-13 | 2017-12-29 | 武汉汉源光通信技术有限公司 | Laser emission automatic control circuit and related chip, optical module and equipment |
| CN107645294A (en) * | 2016-07-21 | 2018-01-30 | 中芯国际集成电路制造(上海)有限公司 | A kind of ac/dc termination power |
| CN209375659U (en) * | 2019-04-17 | 2019-09-10 | 东莞铭普光磁股份有限公司 | Optical module and optical communication equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106330323B (en) * | 2016-09-18 | 2019-01-08 | 青岛海信宽带多媒体技术有限公司 | OLT optical module and OLT |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285875A (en) * | 2007-04-10 | 2008-10-15 | 扬智科技股份有限公司 | Detection circuit and alternating-current /direct current coupling configuration checking method |
| CN107645294A (en) * | 2016-07-21 | 2018-01-30 | 中芯国际集成电路制造(上海)有限公司 | A kind of ac/dc termination power |
| CN206820248U (en) * | 2017-03-13 | 2017-12-29 | 武汉汉源光通信技术有限公司 | Laser emission automatic control circuit and related chip, optical module and equipment |
| CN209375659U (en) * | 2019-04-17 | 2019-09-10 | 东莞铭普光磁股份有限公司 | Optical module and optical communication equipment |
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