CN114465662B - Optical module - Google Patents

Abstract

The application provides an optical module, which comprises a circuit board, an MCU (micro control unit) arranged on the circuit board, a laser driving chip arranged on the circuit board and a laser chip electrically connected with the laser driving chip, wherein the circuit board is provided with a golden finger for receiving signal rate, and the MCU is used for generating a switching instruction according to the signal rate and judging whether to continue outputting the switching instruction according to a first preset value; the laser driving chip is electrically connected with the MCU and comprises a change-over switch and a first register, wherein the change-over switch is used for switching a signal transmission path according to a switching instruction and outputting a modulation current corresponding to the signal rate according to the switched signal transmission path; the first register is used for generating a first preset value according to the conducting state of the speed-switched link; the laser chip is used for emitting optical signals with corresponding rates according to the modulation current. According to the method and the device, whether the rate switching is successful or not is automatically identified through the driving chip, the phenomenon that the rate switching of the optical module is unstable is avoided, and the automatic stabilizing function of the rate switching is realized.

Description

Optical module

Technical Field

The application relates to the technical field of optical communication, in particular to an optical module.

Background

With the development of new business and application modes such as cloud computing, mobile internet, video and the like, the development and progress of optical communication technology become more and more important. In the optical communication technology, the optical module is a tool for realizing the mutual conversion of optical signals, is one of key devices in optical communication equipment, and the transmission rate of the optical module is continuously improved along with the development of the optical communication technology.

In the current network application, the application scenario of multi-rate switching, such as 10.3125G switching with 2.5G switching, 25.78G switching with 10.3125G switching, etc., is often involved, the current optical module performs the action of rate switching by issuing an instruction through the MCU, and the switching circuit implements the channel connection action, and the switching action can be performed once under one instruction, so that the whole rate switching action is completed.

However, with the improvement of the rate of the optical module, experiments show that after the rate switching action of the optical module is finished, the situation that the switching is unsuccessful occurs, namely, the switching circuit fails to finish the rate channel switching successfully, the optical module cannot normally work at the current latest rate, the transmission link is not enabled, namely, the one-time rate switching action of the current optical module has an unstable factor, and the problem that certain probability switching is unsuccessful occurs.

Disclosure of Invention

The embodiment of the application provides an optical module, which aims to solve the problem that an unstable factor exists in the rate switching of the optical module and a certain probability of switching failure can occur.

In a first aspect, the present application provides an optical module comprising:

the circuit board is provided with a golden finger and is used for receiving the speed of the transmitted signal;

The MCU is arranged on the circuit board and is used for generating a switching instruction according to the speed of the transmitting signal and judging whether to continue outputting the switching instruction according to a first preset value;

the laser driving chip is arranged on the circuit board and is electrically connected with the MCU, and comprises a change-over switch and a first register, wherein the change-over switch is used for switching a signal transmission path according to the change-over instruction and outputting a modulation current corresponding to the signal rate according to the switched signal transmission path; the first register is used for generating a first preset value according to the conducting state of the link after rate switching and sending the first preset value to the MCU;

and the laser chip is electrically connected with the laser driving chip and is used for transmitting optical signals with corresponding rates according to the modulation current.

In a second aspect, the present application provides an optical module comprising:

the circuit board is provided with a golden finger and is used for receiving the transmission rate of signals;

the MCU is arranged on the circuit board and is used for generating a switching instruction according to the transmission rate of the signal and judging whether to continue outputting the switching instruction according to a second preset value;

the receiving chip is arranged on the circuit board and is used for converting the received optical signals into electric signals;

The receiving driving chip is arranged on the circuit board and is electrically connected with the MCU and the receiving chip, and comprises a change-over switch and a second register, wherein the change-over switch is used for switching a signal transmission path according to the switching instruction and transmitting the converted electric signal to the golden finger according to the signal rate of the switched signal transmission path; the second register is used for generating a second preset value according to the conducting state of the link after rate switching, and sending the second preset value to the MCU.

In a third aspect, the present application provides an optical module comprising:

the circuit board is provided with a golden finger and is used for receiving the signal rate;

the MCU is arranged on the circuit board and used for generating a transmitting rate switching instruction and a receiving rate switching instruction according to the signal rate; judging whether to continue outputting the transmitting rate switching instruction according to a first preset value, and judging whether to continue outputting the receiving rate switching instruction according to a second preset value;

the receiving and transmitting driving chip is arranged on the circuit board and is electrically connected with the MCU, and comprises a first change-over switch, a first register, a second change-over switch and a second register, wherein the first change-over switch is used for switching a transmitting signal transmission path according to the transmitting rate switching instruction and outputting a modulating current corresponding to the signal rate according to the switched transmitting signal transmission path; the first register is used for generating a first preset value according to the conducting state of the transmission link after rate switching; the second change-over switch is used for switching a receiving signal transmission path according to the receiving rate switching instruction and transmitting the converted electric signal to the golden finger according to the signal rate of the switched receiving signal transmission path; the second register is used for generating a second preset value according to the conducting state of the receiving link after rate switching;

The laser chip is electrically connected with the receiving and transmitting driving chip and is used for transmitting optical signals with corresponding rates according to the modulation current;

and the receiving chip is electrically connected with the receiving and transmitting driving chip and is used for converting the received optical signals into electric signals.

As can be seen from the above embodiments, the present application provides an optical module, where the optical module includes a circuit board, an MCU, a laser driving chip and a laser chip, and a gold finger is disposed on the circuit board and is used for receiving a rate of transmitting signals; the MCU is arranged on the circuit board and used for generating a switching instruction according to the speed of the transmitted signal; the laser driving chip is arranged on the circuit board and is electrically connected with the MCU, and comprises a change-over switch and a first register, wherein the change-over switch is used for switching a signal transmission path according to a switching instruction and outputting a modulation current corresponding to a signal rate according to the switched signal transmission path; the laser chip is electrically connected with the laser driving chip and is used for transmitting optical signals with corresponding rates according to the modulation current. After the signal transmission channel is switched according to the change-over switch, whether the switched signal link is conducted or not is detected, a first register in the laser driving chip can generate a first preset value according to the conducting state of the link after rate switching, and the first preset value is sent to the MCU; and the MCU judges whether the switching is successful or not according to the first preset value, and continuously outputs a switching instruction when the switching is unsuccessful. After the speed switching is finished according to the change-over switch in the laser driving chip, whether the speed switching is successful or not is identified according to the preset value generated by the first register, the MCU continues to switch until the speed switching is successful under the condition that the speed switching is unsuccessful, the phenomenon that the speed switching of the optical module is unstable can be avoided, and the automatic stabilizing function of the speed switching of the optical module is realized.

Drawings

In order to more clearly illustrate the technical solutions of the present disclosure, the drawings that need to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings may be obtained according to these drawings to those of ordinary skill in the art. Furthermore, the drawings in the following description may be regarded as schematic diagrams, not limiting the actual size of the products, the actual flow of the methods, the actual timing of the signals, etc. according to the embodiments of the present disclosure.

Fig. 1 is a connection diagram of an optical communication system according to some embodiments;

fig. 2 is a block diagram of an optical network terminal according to some embodiments;

FIG. 3 is a block diagram of an optical module according to some embodiments;

fig. 4 is an exploded view of a light module according to some embodiments;

fig. 5 is a schematic diagram of a partial structure of a circuit board in an optical module according to an embodiment of the present application;

fig. 6 is a partial block diagram of a first optical module according to an embodiment of the present application;

fig. 7 is a schematic diagram of a partial structure of a circuit board in an optical module according to an embodiment of the present application;

Fig. 8 is a second partial structural block diagram of an optical module provided in an embodiment of the present application;

fig. 9 is a schematic diagram of a partial structure of a circuit board in an optical module according to an embodiment of the present application;

fig. 10 is a partial block diagram III of an optical module according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present disclosure will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by one of ordinary skill in the art based on the embodiments provided by the present disclosure are within the scope of the present disclosure.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and its other forms such as the third person referring to the singular form "comprise" and the present word "comprising" are to be construed as open, inclusive meaning, i.e. as "comprising, but not limited to. In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", "some examples", "and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

In describing some embodiments, expressions of "coupled" and "connected" and their derivatives may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. As another example, the term "coupled" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled (communicatively coupled)" may also mean that two or more elements are not in direct contact with each other, but yet still co-operate or interact with each other. The embodiments disclosed herein are not necessarily limited to the disclosure herein.

At least one of "A, B and C" has the same meaning as at least one of "A, B or C," both include the following combinations of A, B and C: a alone, B alone, C alone, a combination of a and B, a combination of a and C, a combination of B and C, and a combination of A, B and C.

"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.

The use of "adapted" or "configured to" herein is meant to be an open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

As used herein, "about," "approximately" or "approximately" includes the stated values as well as average values within an acceptable deviation range of the particular values as determined by one of ordinary skill in the art in view of the measurement in question and the errors associated with the measurement of the particular quantity (i.e., limitations of the measurement system).

In the optical communication technology, light is used to carry information to be transmitted, and an optical signal carrying the information is transmitted to an information processing device such as a computer through an information transmission device such as an optical fiber or an optical waveguide, so as to complete the transmission of the information. Since the optical signal has a passive transmission characteristic when transmitted through an optical fiber or an optical waveguide, low-cost and low-loss information transmission can be realized. Further, since a signal transmitted by an information transmission device such as an optical fiber or an optical waveguide is an optical signal and a signal that can be recognized and processed by an information processing device such as a computer is an electrical signal, it is necessary to perform mutual conversion between the electrical signal and the optical signal in order to establish an information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer.

The optical module realizes the function of interconversion between the optical signal and the electric signal in the technical field of optical fiber communication. The optical module comprises an optical port and an electric port, the optical module realizes optical communication with information transmission equipment such as optical fibers or optical waveguides through the optical port, realizes electric connection with an optical network terminal (for example, optical cat) through the electric port, and is mainly used for realizing power supply, I2C signal transmission, data signal transmission, grounding and the like; the optical network terminal transmits the electric signal to information processing equipment such as a computer through a network cable or wireless fidelity (Wi-Fi).

Fig. 1 is a connection diagram of an optical communication system according to some embodiments. As shown in fig. 1, the optical communication system mainly includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101, and a network cable 103;

one end of the optical fiber 101 is connected to the remote server 1000, and the other end is connected to the optical network terminal 100 through the optical module 200. The optical fiber itself can support long-distance signal transmission, such as signal transmission of several kilometers (6-8 kilometers), on the basis of which, if a repeater is used, it is theoretically possible to realize ultra-long-distance transmission. Thus, in a typical optical communication system, the distance between the remote server 1000 and the optical network terminal 100 may typically reach several kilometers, tens of kilometers, or hundreds of kilometers.

One end of the network cable 103 is connected to the local information processing device 2000, and the other end is connected to the optical network terminal 100. The local information processing apparatus 2000 may be any one or several of the following: routers, switches, computers, cell phones, tablet computers, televisions, etc.

The physical distance between the remote server 1000 and the optical network terminal 100 is greater than the physical distance between the local information processing apparatus 2000 and the optical network terminal 100. The connection between the local information processing device 2000 and the remote server 1000 is completed by an optical fiber 101 and a network cable 103; and the connection between the optical fiber 101 and the network cable 103 is made by the optical module 200 and the optical network terminal 100.

The optical module 200 includes an optical port and an electrical port. The optical port is configured to connect with the optical fiber 101 such that the optical module 200 establishes a bi-directional optical signal connection with the optical fiber 101; the electrical port is configured to be accessed into the optical network terminal 100 such that the optical module 200 establishes a bi-directional electrical signal connection with the optical network terminal 100. The optical module 200 performs mutual conversion between optical signals and electrical signals, so that a connection is established between the optical fiber 101 and the optical network terminal 100. For example, an optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input to the optical network terminal 100, and an electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input to the optical fiber 101.

The optical network terminal 100 includes a substantially rectangular parallelepiped housing (housing), and an optical module interface 102 and a network cable interface 104 provided on the housing. The optical module interface 102 is configured to access the optical module 200, so that the optical network terminal 100 and the optical module 200 establish a bidirectional electrical signal connection; the network cable interface 104 is configured to access the network cable 103 such that the optical network terminal 100 establishes a bi-directional electrical signal connection with the network cable 103. A connection is established between the optical module 200 and the network cable 103 through the optical network terminal 100. By way of example, since the optical network terminal 100 transmits an electrical signal from the optical module 200 to the network cable 103 and transmits a signal from the network cable 103 to the optical module 200, the optical network terminal 100 can monitor the operation of the optical module 200 as a host computer of the optical module 200. The upper computer of the optical module 200 may include an optical line terminal (Optical Line Terminal, OLT) or the like in addition to the optical network terminal 100.

The remote server 1000 establishes a bidirectional signal transmission channel with the local information processing device 2000 through the optical fiber 101, the optical module 200, the optical network terminal 100 and the network cable 103.

Fig. 2 is a block diagram of an optical network terminal according to some embodiments, and fig. 2 only shows a structure of the optical network terminal 100 related to the optical module 200 in order to clearly show a connection relationship between the optical module 200 and the optical network terminal 100. As shown in fig. 2, the optical network terminal 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on a surface of the PCB circuit board 105, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access an electrical port of the optical module 200; the heat sink 107 has a convex portion such as a fin that increases the heat dissipation area.

The optical module 200 is inserted into the cage 106 of the optical network terminal 100, the optical module 200 is fixed by the cage 106, and heat generated by the optical module 200 is transferred to the cage 106 and then diffused through the heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected with an electrical connector inside the cage 106, so that the optical module 200 establishes a bi-directional electrical signal connection with the optical network terminal 100. In addition, the optical port of the optical module 200 is connected to the optical fiber 101, so that the optical module 200 establishes a bi-directional electrical signal connection with the optical fiber 101.

Fig. 3 is a block diagram of an optical module according to some embodiments, and fig. 4 is an exploded view of an optical module according to some embodiments. As shown in fig. 3 and 4, the optical module 200 includes a housing, a circuit board 300 disposed in the housing, and an optical transceiver;

the housing includes an upper housing 201 and a lower housing 202, the upper housing 201 being capped on the lower housing 202 to form the above-described housing having two openings 204 and 205; the outer contour of the housing generally presents a square shape.

In some embodiments of the present disclosure, the lower housing 202 includes a bottom plate and two lower side plates disposed at both sides of the bottom plate and perpendicular to the bottom plate; the upper case 201 includes a cover plate, and two upper side plates disposed at two sides of the cover plate and perpendicular to the cover plate, and two side walls are combined with the two side plates to realize that the upper case 201 is covered on the lower case 202.

The direction of the connection line of the two openings 204 and 205 may be identical to the length direction of the optical module 200 or not identical to the length direction of the optical module 200. Illustratively, opening 204 is located at the end of light module 200 (right end of fig. 3) and opening 205 is also located at the end of light module 200 (left end of fig. 3). Alternatively, the opening 204 is located at the end of the light module 200, while the opening 205 is located at the side of the light module 200. The opening 204 is an electrical port, and the golden finger of the circuit board 300 extends out of the electrical port 204 and is inserted into an upper computer (such as the optical network terminal 100); the opening 205 is an optical port configured to be connected to the external optical fiber 101, so that the optical fiber 101 is connected to an optical transceiver device inside the optical module 200.

By adopting the assembly mode of combining the upper shell 201 and the lower shell 202, devices such as the circuit board 300, the optical transceiver and the like are conveniently installed in the shell, and the upper shell 201 and the lower shell 202 can form packaging protection for the devices. In addition, when devices such as the circuit board 300 are assembled, the positioning component, the heat dissipation component and the electromagnetic shielding component of the devices are conveniently arranged, and the automatic implementation and production are facilitated.

In some embodiments, the upper housing 201 and the lower housing 202 are generally made of metal materials, which is beneficial to electromagnetic shielding and heat dissipation.

In some embodiments, the optical module 200 further includes an unlocking member 203 located on an outer wall of the housing, and the unlocking member 203 is configured to achieve a fixed connection between the optical module 200 and the host computer, or release the fixed connection between the optical module 200 and the host computer.

Illustratively, the unlocking member 203 is located on the outer walls of the two lower side plates of the lower housing 202, and includes a snap-in member that mates with the cage of the host computer (e.g., cage 106 of the optical network terminal 100). When the optical module 200 is inserted into the cage of the upper computer, the optical module 200 is fixed in the cage of the upper computer by the clamping component of the unlocking component 203; when the unlocking member 203 is pulled, the engaging member of the unlocking member 203 moves along with the unlocking member, so as to change the connection relationship between the engaging member and the host computer, so as to release the engagement relationship between the optical module 200 and the host computer, and thus the optical module 200 can be pulled out from the cage of the host computer.

The circuit board 300 includes circuit traces, electronic components and chips, which are connected together by the circuit traces according to a circuit design to realize functions such as power supply, electrical signal transmission, and grounding. The electronic components may include, for example, capacitors, resistors, transistors, metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). The chips may include, for example, a micro control unit (Microcontroller Unit, MCU), transimpedance amplifier (Transimpedance Amplifier, TIA), clock data recovery chip (Clock and Data Recovery, CDR), power management chip, digital signal processing (Digital Signal Processing, DSP) chip.

The circuit board 300 is generally a hard circuit board, and the hard circuit board can also realize a bearing function due to the relatively hard material, for example, the hard circuit board can stably bear chips; the hard circuit board can also be inserted into an electrical connector in the upper computer cage.

The circuit board 300 further includes a gold finger formed on an end surface thereof, the gold finger being composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106 and is conductively connected to the electrical connectors within the cage 106 by the gold fingers. The golden finger can be arranged on the surface of one side of the circuit board 300 (for example, the upper surface shown in fig. 4) or on the surfaces of the upper side and the lower side of the circuit board 300, so as to adapt to the occasion with large pin number requirements. The golden finger is configured to establish electrical connection with the upper computer to achieve power supply, grounding, I2C signal transmission, data signal transmission and the like. Of course, flexible circuit boards may also be used in some optical modules. The flexible circuit board is generally used in cooperation with the rigid circuit board to supplement the rigid circuit board.

The optical transceiver device includes an optical transmitting assembly 400 and an optical receiving assembly 500, which are respectively used for realizing the transmission of the optical signal and the reception of the optical signal. The light emitting assembly 400 generally includes a light emitter, a lens and a light detector, wherein the lens and the light detector are respectively located at different sides of the light emitter, the front side and the back side of the light emitter respectively emit light beams, and the lens is used for converging the light beams emitted by the front side of the light emitter, so that the light beams emitted by the light emitter are converged light, and are conveniently coupled to an external optical fiber. In order to drive the light emitter in the light emitting assembly 400 to generate a laser beam, the circuit board 300 is provided with an emitting driving chip, the emitting driving chip can be electrically connected with the light emitter through wire bonding, so that the golden finger transmits an electric signal transmitted by the upper computer to the emitting driving chip, the emitting driving chip transmits power supply parameters to the light emitter, and the light emitter generates a laser signal according to the power supply parameters.

The light receiving assembly 500 generally includes a receiving chip and a transimpedance amplifier, the receiving chip is configured to convert a received external light signal into an electrical signal, the electrical signal is amplified by the transimpedance amplifier and then transmitted to the gold finger on the circuit board 300, and the electrical signal is transmitted to the host computer via the gold finger. In order to adjust the electric signal transmitted to the upper computer, the circuit board 300 is provided with a receiving driving chip, and the receiving driving chip is electrically connected with the receiving chip or the transimpedance amplifier, so that the electric signal output by the receiving chip is transmitted to the receiving driving chip, the electric signal is adjusted by the receiving driving chip, and the adjusted electric signal is transmitted to the upper computer.

In the current network application, the application scenario of multi-rate switching, such as 10.3125G and 2.5G switching, 25.78G and 10.3125G switching, etc., is often involved. An optical module, which is an important component in current network applications, needs to have a rate switching function to match application scenarios with various rate changes. The switching rate of the optical module is realized through a CDR (clock data recovery) chip in the module, the CDR chip is integrated in a driving chip, the driving chip comprises a change-over switch, a bypass and the CDR chip, one end of the bypass and one end of the CDR chip are electrically connected with the change-over switch, the other end of the bypass and the other end of the clock chip are electrically connected with an output port of the laser driving chip, and the change-over switch selects the bypass or the clock chip according to a rate switching instruction so as to select a signal transmission path of the bypass or a signal transmission path of the clock chip for signal transmission.

Taking the switching of the rates of 25.78G and 10.3125G as an example, the signal will first enter a switch before entering the CDR chip, and the switch will continue to select which path to transmit through according to the rate of the signal, for example, when the rate of the signal is 25.78G, the signal is transmitted to the back end after clock data recovery by the transmitting or receiving CDR chip, and when the rate of the signal is 10.3125G, the signal will not pass through the CDR chip any more, but will bypass another path beside the CDR chip, which is equivalent to bypassing the CDR chip at this time.

In some embodiments, the switch does not have the function of automatically identifying the signal rate, but only the function of performing the switching of the signal transmission channel, and the switching action requires an instruction issued by the MCU outside the CDR chip according to the current real-time signal rate. If the signal rate is 25.78G, the MCU gives a command a to the switch, and the switch connects the signal transmission channel to the CDR; when the signal rate is 10.3125G, the MCU gives an instruction B to the change-over switch, and at the moment, the change-over switch connects the signal transmission channel to the bypass path to realize the internal rate switching of the optical module, and the optical module can normally work under the current signal rate after the rate switching is successful.

However, with the increase of the optical module rate, experiments show that after the optical module rate switching action is finished, the situation that the switching is unsuccessful occurs, that is, the switching switch fails to complete channel switching, the optical module cannot normally work at the current latest rate, and the transmission link is not enabled.

In order to solve the above problems, the present application provides an optical module, which can automatically identify whether a handover is successful or not, and continue the handover under the condition of unsuccessful handover until an automatic stabilization function of successful rate handover is ensured.

Fig. 5 is a schematic diagram of a local structure of a circuit board in an optical module according to an embodiment of the present application, and fig. 6 is a schematic diagram of a local structure of an optical module according to an embodiment of the present application. As shown in fig. 5 and 6, the optical module provided in the embodiment of the present application includes a circuit board 300, an MCU320, a laser driving chip 330 and a laser chip 340, where a gold finger 310 is disposed on the circuit board 300, and the gold finger 310 is used for receiving a rate of transmitting signals. In some embodiments, the user switches the transmission signal rate and inputs a signal rate at the host computer, such as 25.78g,10.3125g, to the circuit board 300 via the golden finger 310.

The MCU320 is disposed on the circuit board 300, and is configured to detect a rate of a transmission signal transmitted by the golden finger 310, and generate a switching command according to the rate of the transmission signal.

The laser driving chip 330 is disposed on the circuit board 300 and electrically connected to the MCU320, and includes a switch, a bypass, a transmitting clock chip and a first register, where the switch is configured to switch a signal transmission path according to a switching instruction, that is, the switch selects to connect the bypass or the transmitting clock chip according to the switching instruction, if the transmitting signal rate is 25.78G, the switch selects to connect the switch to the transmitting clock chip according to the switching instruction, and the electrical signal outputs a modulation current corresponding to the signal rate after clock data recovery by the transmitting clock chip; when the speed of the transmitted signal is 10.3125G, the change-over switch selectively connects the change-over switch to the bypass according to the change-over instruction, and the electric signal passes through the bypass and outputs the modulation current corresponding to the signal speed.

The laser chip 340 is electrically connected with the laser driving chip 330, and the laser chip 340 emits an optical signal with a corresponding rate according to the modulation current, so that the optical signal generated by the laser chip 340 is emitted at a corresponding signal rate.

The first register is configured to generate a first preset value according to a conducting state of the link after rate switching, and send the first preset value to the MCU320, where the MCU320 determines whether to continue outputting the switching command according to the first preset value.

In some embodiments, to identify whether the optical module is operating normally at the post-switching rate after the rate switching action is completed, it may be possible to identify whether the switching action is successful by the link state of the optical module. If the rate switching is successful, the optical module link is in a conducting state, and a corresponding register is arranged in the optical module to characterize the state; if the rate switching fails, the optical module is in an exercise state, and a corresponding register in the optical module performs another characterization on the state.

The laser driving chip 330 recognizes that the link on state of the optical module is a self-contained function inside the driving chip, and when the link is on, some functional parts inside the driving chip need to work, and there are marked electrical signals (such as voltage signals and current signals); if the link is not conductive, some functional parts inside the driving chip are not working, and the signals such as voltage signals or current signals are also marked. Therefore, whether the link is turned on or not can be determined based on the electric signal flag in the laser driving chip 330.

In some embodiments, after the rate switching, the optical module link is in a conductive state, which indicates that the rate switching is successful, and the first register generates a first preset value of 0; after the rate switching, the optical module link is in a broken link state, which indicates that the rate switching is unsuccessful, and the first register generates a first preset value of 1.

The MCU320 receives a first preset value reported by the first register, and when the first preset value is detected to be 0, the MCU320 judges that the rate switching is successful and finishes the rate switching action; when the first preset value is detected to be 1, the MCU320 determines that the rate switching is unsuccessful, and then the MCU continues to send a switching instruction to the switch, and continues to perform the rate switching action until the MCU320 detects that the first preset value is 0, and the rate switching is successful.

In the present application, by setting a first register in the laser driving chip 330, the laser driving chip 330 automatically detects whether the transmission link is turned on after the rate is switched, stores a first preset value of 0 or 1 in the first register according to whether the transmission link is turned on, and transmits the first preset value to the MCU320; MCU320 judges whether the rate switching is successful according to the first preset value reported by the first register, and continues to issue the switching instruction and complete the next switching action under the unsuccessful condition until the rate switching is successful. Therefore, the phenomenon of unstable rate switching of the optical module is thoroughly avoided, and the automatic stabilizing function of the rate switching of the optical module is realized.

Likewise, not only the first register may be integrated in the laser driving chip 330 of the light emitting component 400, the first register may send different preset values to the MCU320 according to the on state of the link after the rate switching, the MCU320 may determine whether the rate switching is successful according to the preset values, but also the second register may be integrated in the driving chip of the light receiving component 500, and determine whether the receiving rate switching is successful according to the preset values reported to the MCU by the second register.

Fig. 7 is a schematic diagram of a partial structure of a circuit board in an optical module according to an embodiment of the present application, and fig. 8 is a block diagram of a partial structure of an optical module according to an embodiment of the present application. As shown in fig. 7 and 8, the optical module provided in the embodiment of the present application includes a circuit board 300, an MCU320, a receiving driving chip 350 and a receiving chip 360, where a gold finger 310 is disposed on the circuit board 300, and the gold finger 310 is used for receiving a transmission rate of a signal. In some embodiments, the user switches the received signal rate, and inputs the received signal rate to the host computer, such as 25.78g,10.3125g, etc., for transmission to the circuit board 300 via the golden finger 310.

The MCU320 is disposed on the circuit board 300, and is configured to detect a rate of a received signal transmitted by the golden finger 310, and generate a switching command according to the rate of the received signal.

The receiving chip 360 is disposed on the circuit board 300, and converts the received external optical signal into an electrical signal, and transmits the converted electrical signal to the receiving driving chip 350.

In some embodiments, the optical module provided in the embodiments of the present application further includes a transimpedance amplifier, where the transimpedance amplifier is disposed on the circuit board 300 and electrically connected to the receiving chip 360 and the receiving driving chip 350, the receiving chip 360 converts the received optical signal into an electrical signal, the electrical signal is transmitted to the transimpedance amplifier, the transimpedance amplifier amplifies the electrical signal, and the amplified electrical signal is transmitted to the receiving driving chip 350.

The receiving driving chip 350 is disposed on the circuit board 300 and electrically connected to the MCU320 and the receiving chip 360, and includes a switch, a bypass, a receiving clock chip and a second register, where the switch is configured to switch a signal transmission path according to a switching instruction, that is, the switch selects to connect the bypass or the receiving clock chip according to the switching instruction, if the rate of a received signal is 25.78G, the switch selects to connect the switch to the receiving clock chip according to the switching instruction, and an electrical signal from the receiving chip 360 is transmitted to the golden finger 310 at a corresponding signal rate after clock data recovery by the receiving clock chip; if the rate of the received signal is 10.3125G, the switch selectively connects the switch to the bypass according to the switching command, and the electrical signal from the receiving chip 360 is transmitted to the golden finger 310 at the corresponding signal rate after passing through the bypass.

The second register is configured to generate a second preset value according to the on state of the link after rate switching, and send the second preset value to the MCU320, where the MCU320 determines whether to continue outputting the switching command according to the second preset value.

In some embodiments, to identify whether the optical module is operating normally at the post-switching rate after the rate switching action is completed, it may be possible to identify whether the switching action is successful by the link state of the optical module. The receiving driving chip 350 recognizes that the link on state of the optical module is a self-contained function inside the driving chip, and when the link is on, some functional parts inside the driving chip need to work, and there are marked electrical signals (such as voltage signals and current signals); if the link is not conductive, some functional parts inside the driving chip are not working, and the signals such as voltage signals or current signals are also marked. Therefore, it can be determined whether the link is turned on according to the electric signal flag in the reception driving chip 350.

In some embodiments, after the rate switch, the optical module link is in a conductive state, which indicates that the rate switch is successful, and the second register generates a second preset value of 0; after the rate switching, the optical module link is in a broken link state, which indicates that the rate switching is unsuccessful, and the second register generates a second preset value of 1.

The MCU320 receives a second preset value reported by a second register, and when the second preset value is detected to be 0, the MCU320 judges that the rate switching is successful and finishes the rate switching action; when the second preset value is detected to be 1, the MCU320 determines that the rate switching is unsuccessful, and then the MCU continues to send a switching instruction to the switch, and continues to perform the rate switching action until the MCU320 detects that the second preset value is 0, and the rate switching is successful.

In this application, by setting a second register in the receiving driving chip 350, the receiving driving chip 350 automatically detects whether the transmission link is turned on after the rate is switched, stores a second preset value of 0 or 1 in the second register according to whether the transmission link is turned on, and transmits the second preset value to the MCU320; MCU320 judges whether the rate switch is functional according to the second preset value reported by the second register, and continues to issue the switch instruction and complete the next switch action under the unsuccessful condition until the rate switch is successful. Therefore, the phenomenon of unstable rate switching of the optical module is thoroughly avoided, and the automatic stabilizing function of the rate switching of the optical module is realized.

In some embodiments, not only the first register may be set in the transmitting driving chip to detect whether the transmitting rate switching is successful, the second register may be set in the receiving driving chip to detect whether the receiving rate switching is successful, but also the first register and the second register may be set in the receiving driving chip to detect whether the transmitting rate switching and the receiving rate switching are successful.

Fig. 9 is a schematic diagram of a partial structure of a circuit board in an optical module according to an embodiment of the present application, and fig. 10 is a block diagram of a partial structure of an optical module according to an embodiment of the present application. As shown in fig. 9 and 10, the optical module provided in the embodiment of the present application includes a circuit board 300, an MCU320, a transceiver driving chip 370, a laser chip 340 and a receiving chip 360, where a gold finger 310 is disposed on the circuit board 300, and the gold finger 310 is used for receiving a signal rate. In some embodiments, the user switches the transmission/reception signal rate, and inputs the signal rate to the upper computer, such as 25.78g,10.3125g, etc., via the golden finger 310 to the circuit board 300.

The MCU320 is disposed on the circuit board 300, and is configured to detect a signal rate transmitted by the golden finger 310, and generate a transmission rate switching instruction and a reception rate switching instruction according to the signal rate.

The transceiver driving chip 370 is disposed on the circuit board 300 and electrically connected to the MCU320, and includes a first switch, a first register, a second switch and a second register, where the first switch is configured to switch a transmission signal transmission path according to a transmission rate switching instruction, and output a modulation current corresponding to a signal rate according to the transmission signal transmission path after switching, i.e., the first switch selectively connects the switch to a bypass or a transmission clock chip according to the transmission rate switching instruction, and outputs a modulation current corresponding to the signal rate after an electrical signal transmitted by the golden finger 310 passes through the bypass or the transmission clock chip.

The laser chip 340 is electrically connected with the transceiver driving chip 370, and the laser chip 340 emits an optical signal with a corresponding rate according to the received modulation current, so that the laser chip 340 emits an optical signal with a corresponding signal rate according to the modulation current.

The first register is configured to generate a first preset value according to a conducting state of the transmission link after rate switching, and send the first preset value to the MCU320, where the MCU320 determines whether to continue outputting the transmission switching instruction according to the first preset value.

In some embodiments, the transceiver driver chip 370 identifies that the link on state of the optical module is a self-contained function within the driver chip, after the rate switching, the transmitting link of the optical module is in the on state, which indicates that the transmitting rate switching is successful, and the first register generates a first preset value of 0; after the rate switching, the transmitting link of the optical module is in a broken link state, which indicates that the rate switching is unsuccessful, and the first register generates a first preset value of 1.

The MCU320 receives a first preset value reported by the first register, and when the first preset value is detected to be 0, the MCU320 judges that the transmission rate is successfully switched, and the rate switching action is ended; when the first preset value is detected to be 1, the MCU320 determines that the transmission rate switching is unsuccessful, and then the MCU continues to send a transmission rate switching instruction to the switch, and continues to perform the transmission rate switching action until the MCU320 detects that the first preset value is 0, and the transmission rate switching is successful.

The receiving chip 360 is electrically connected to the transceiving driving chip 370, and is used for converting a received external optical signal into an electrical signal and transmitting the electrical signal to the transceiving driving chip 370.

The second switch is configured to switch the receiving signal transmission path according to the receiving rate switching instruction, and transmit the converted electrical signal to the golden finger 310 according to the signal rate of the switched receiving signal transmission path, so as to implement receiving of the optical signal. That is, the second switch selects to connect the bypass or the receiving clock chip according to the receiving rate switching instruction, and the electrical signal from the receiving chip 360 is transmitted to the golden finger 310 at the corresponding signal rate after being processed by the selected bypass or receiving clock chip.

The second register is configured to generate a second preset value according to the on state of the receiving link after rate switching, and send the second preset value to the MCU320, where the MCU320 determines whether to continue outputting the receiving rate switching instruction according to the second preset value.

In some embodiments, the transceiver driver chip 370 identifies that the link on state of the optical module is a self-contained function within the driver chip, and after the rate switching, the receiving link of the optical module is in the on state, which indicates that the receiving rate switching is successful, and the second register generates a second preset value of 0; after the rate switching, the receiving link of the optical module is in a broken link state, which indicates that the receiving rate switching is unsuccessful, and the second register generates a second preset value of 1.

The MCU320 receives a second preset value reported by a second register, and when the second preset value is detected to be 0, the MCU320 judges that the receiving rate switching is successful and finishes the rate switching action; when the second preset value is detected to be 1, the MCU320 determines that the receiving rate switching is unsuccessful, and then the MCU continues to send a receiving rate switching instruction to the switch, and continues to perform the receiving rate switching action until the MCU320 detects that the second preset value is 0, and the receiving rate switching is successful.

In the optical module provided by the embodiment of the application, the MCU sends the switching instruction to the driving chip according to the signal rate, when the switching switch in the driving chip switches the signal transmission channel according to the switching instruction, in order to avoid that the switching switch fails to complete the channel switching, the driving chip automatically identifies whether the rate switching is successful or not, and generates different preset values in the register in the driving chip according to whether the switching is successful or not, the MCU determines whether the rate switching is successful or not according to the preset values, and continues to automatically issue the switching instruction under the unsuccessful condition, and completes the next switching action until the rate switching is successful, so that the phenomenon that the rate switching of the optical module is unstable is avoided, and the automatic stabilizing function of the rate switching of the optical module is realized.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An optical module, comprising:

the circuit board is provided with a golden finger and is used for receiving the speed of the transmitted signal;

the MCU is arranged on the circuit board and is used for generating a switching instruction according to the speed of the transmitting signal and judging whether to continue outputting the switching instruction according to a first preset value;

the laser driving chip is arranged on the circuit board and is electrically connected with the MCU, and comprises a change-over switch and a first register, wherein the change-over switch is used for switching a signal transmission path according to the change-over instruction and outputting a modulation current corresponding to the signal rate according to the switched signal transmission path; the first register is used for generating a first preset value according to the conducting state of the link after rate switching and sending the first preset value to the MCU;

And the laser chip is electrically connected with the laser driving chip and is used for transmitting optical signals with corresponding rates according to the modulation current.

2. The optical module of claim 1, wherein the laser driver chip further comprises a bypass and a clock chip, wherein one end of the bypass and one end of the clock chip are electrically connected with the switch, the other end of the bypass and the other end of the clock chip are electrically connected with the output port of the laser driver chip, and the switch is communicated with the bypass or the clock chip according to the switching instruction.

3. The optical module of claim 1, wherein the laser driver chip is further configured to detect an internal electrical signal flag, and determine whether the link after rate switching is on based on the electrical signal flag.

4. The optical module of claim 3, wherein the first register is configured to generate a first preset value of 0 when the link state is an on state after rate switching;

and the MCU is used for judging that the rate switching is unsuccessful according to the first preset value and continuously sending a switching instruction to the switching switch.

5. The optical module of claim 3, wherein the first register is configured to generate a first preset value of 1 when the link state is a broken link state after rate switching;

And the MCU is used for judging that the rate switching is successful according to the first preset value.

6. An optical module, characterized in that,

the circuit board is provided with a golden finger and is used for receiving the transmission rate of signals;

the MCU is arranged on the circuit board and is used for generating a switching instruction according to the transmission rate of the signal and judging whether to continue outputting the switching instruction according to a second preset value;

the receiving chip is arranged on the circuit board and is used for converting the received optical signals into electric signals;

the receiving driving chip is arranged on the circuit board and is electrically connected with the MCU and the receiving chip, and comprises a change-over switch and a second register, wherein the change-over switch is used for switching a signal transmission path according to the switching instruction and transmitting the converted electric signal to the golden finger according to the signal rate of the switched signal transmission path; the second register is used for generating a second preset value according to the conducting state of the link after rate switching, and sending the second preset value to the MCU.

7. The optical module of claim 6, wherein the second register is configured to generate a second preset value of 0 when the link state is an on state after rate switching;

And the MCU is used for judging that the rate switching is unsuccessful according to the second preset value and continuously sending a switching instruction to the switching switch.

8. The optical module of claim 6, wherein the second register is configured to generate a second preset value of 1 when the link state is a broken link state after rate switching;

and the MCU is used for judging that the rate switching is successful according to the second preset value.

9. The optical module of claim 6, further comprising:

and the transimpedance amplifier is arranged on the circuit board, is electrically connected with the receiving chip and the receiving driving chip and is used for amplifying the electric signal from the receiving chip, and the amplified electric signal is transmitted to the receiving driving chip for speed adjustment.

10. An optical module, comprising:

the circuit board is provided with a golden finger and is used for receiving the signal rate;

the MCU is arranged on the circuit board and used for generating a transmitting rate switching instruction and a receiving rate switching instruction according to the signal rate; judging whether to continue outputting the transmitting rate switching instruction according to a first preset value, and judging whether to continue outputting the receiving rate switching instruction according to a second preset value;

The receiving and transmitting driving chip is arranged on the circuit board and is electrically connected with the MCU, and comprises a first change-over switch, a first register, a second change-over switch and a second register, wherein the first change-over switch is used for switching a transmitting signal transmission path according to the transmitting rate switching instruction and outputting a modulating current corresponding to the signal rate according to the switched transmitting signal transmission path; the first register is used for generating a first preset value according to the conducting state of the transmission link after rate switching; the second change-over switch is used for switching a receiving signal transmission path according to the receiving rate switching instruction and transmitting the converted electric signal to the golden finger according to the signal rate of the switched receiving signal transmission path; the second register is used for generating a second preset value according to the conducting state of the receiving link after rate switching;

the laser chip is electrically connected with the receiving and transmitting driving chip and is used for transmitting optical signals with corresponding rates according to the modulation current;

and the receiving chip is electrically connected with the receiving and transmitting driving chip and is used for converting the received optical signals into electric signals.