CN115133998B - Optical module and wavelength self-adaption method based on message channel - Google Patents

Abstract

The application provides an optical module and a wavelength self-adaption method based on a message channel, wherein the optical module comprises an optical emission component, an optical receiving component and an MCU, and the optical emission component is used for emitting a first optical signal carrying a low-frequency message channel signal; the light receiving component is used for receiving a second light signal; the MCU is used for sending a wavelength changing instruction and wavelength information, the wavelength information is loaded to the first optical signal in a low-frequency message mode, the optical emission component emits the first optical signal corresponding to the wavelength information according to the instruction, and whether the wavelength is changed again is judged according to a low-frequency message channel signal loaded on the second optical signal. According to the method and the device, the low-frequency signal is loaded on the basis of the normal service signal, the function of a message channel is increased, the self-adaption of the wavelengths of the optical modules at two ends is completed on the basis that the normal service communication function is not affected, the wavelength is self-adaption is carried out by changing the wavelength, the automatic wavelength self-adaption function is realized, and the communication efficiency of the optical modules is improved.

Description

An optical module and a message channel-based wavelength adaptation method

Technical field

The present application relates to the field of optical fiber communication technology, and in particular, to an optical module and a wavelength adaptation method based on a message channel.

Background technique

With the development of new services and application models such as cloud computing, mobile Internet, and video, the development and progress of optical communication technology has become increasingly important. In optical communication technology, optical modules are tools for realizing mutual conversion of optical and electrical signals. They are one of the key components in optical communication equipment. With the development of optical communication technology, the transmission rate of optical modules continues to increase.

Currently, devices at both ends of the network are inseparable from optical modules, and optical modules are generally composed of two parts: transmitting and receiving, so that photoelectric conversion and electro-optical conversion can be performed. Optical modules now include single-fiber bidirectional optical modules and dual-fiber bidirectional optical modules. For example, colored light Tunable-BIDI optical modules refer to single-fiber bidirectional wavelength-tunable optical modules. BIDI optical modules use the BOSA solution, and the wavelengths of transmitting and receiving are different. BIDI Modules are used in pairs. At present, in order to achieve channel communication between pairs of modules, the operator usually manually configures the transmit wavelength of a module, transmits the configured wavelength through the transmit channel, and correspondingly finds the receive channel with the same wavelength as the transmit channel, thereby realizing the optical module. Information links are connected.

However, when using the above method to connect pairs of modules, it is inefficient for operators to manually configure wavelengths. They need to predetermine the channel number/wavelength information in the optical network to which the module fibers are connected, and then manually configure the modules to the corresponding channels/wavelengths. In terms of wavelength, the communication efficiency of colored light Tunable-BIDI optical modules is low.

Contents of the invention

Embodiments of the present application provide an optical module and a message channel-based wavelength adaptation method to realize the automated wavelength adaptation function of the colored light Tunable-BIDI optical module and improve the communication efficiency of the optical module.

In the first aspect, this application provides an optical module, including:

An optical transmitting component configured to transmit a first optical signal carrying a low-frequency message channel signal;

a light receiving component configured to receive a second optical signal from the outside;

The MCU is electrically connected to the optical transmitting component and the optical receiving component, and is configured to issue an instruction to change the wavelength and wavelength information. The wavelength information is loaded into the first optical signal in the form of a low-frequency message. The light emitting component emits a first optical signal corresponding to the wavelength information according to the instruction; and determines whether to change the wavelength of the first optical signal again according to the low-frequency message channel signal loaded on the second optical signal.

In the second aspect, this application provides an optical module, including:

The light receiving component is configured to receive a first optical signal from the outside;

a light emitting component configured to emit a second optical signal;

MCU is electrically connected to the light receiving component and the light transmitting component, and is configured to demodulate the low-frequency message channel signal of the first optical signal, and generate response information according to the low-frequency message channel signal; and, The response information is loaded into the low-frequency message channel signal, and the light-emitting component is controlled to emit a second optical signal carrying the low-frequency message channel signal.

In the third aspect, this application provides a message channel-based wavelength adaptation method, including:

Send a first optical signal, wherein the first optical signal is an optical signal loaded with a low-frequency message channel signal on a high-frequency signal, the high-frequency signal is a normal service signal, and the low-frequency message channel signal is used to indicate wavelength information of the first optical signal;

receiving a second light signal from the outside;

Determine whether to change the wavelength of the first optical signal according to the low-frequency message channel signal loaded on the second optical signal.

In the fourth aspect, this application provides a message channel-based wavelength adaptation method, which method includes:

Receive the first light signal from the outside;

Demodulate the low-frequency message channel signal loaded on the first optical signal to obtain the wavelength information of the first optical signal;

Generate response information according to the wavelength information of the first optical signal;

The response information is loaded into the low-frequency message channel signal, and a second optical signal carrying the low-frequency message channel signal is emitted.

The optical module provided by this application is a colored light Tunable-BIDI optical module used in pairs. Both optical modules include an optical transmitting component, an optical receiving component and an MCU. The first MCU of the first optical module transmits light to the first optical component. Issue an instruction to change the wavelength and wavelength information, the wavelength information is loaded into the first optical signal emitted by the optical transmitting component in the form of a low-frequency message, and the optical transmitting component emits the first optical signal carrying the low-frequency message channel signal to the second optical module according to the instruction; The second optical receiving component of the second optical module receives the first optical signal, and the second MCU demodulates the low-frequency message channel signal carried by the first optical signal to obtain the wavelength information of the first optical signal. According to the wavelength information of the first optical signal Generate response information, load the response information to the low-frequency message channel signal, and control the second optical transmitting component to transmit a second optical signal carrying the low-frequency message channel signal to the first optical module; the first optical receiving component of the first optical module receives For the second optical signal, the first MCU demodulates the low-frequency message channel signal carried by the second optical signal, obtains response information, and determines whether to change the wavelength of the first optical signal again based on the response information. This application loads low-frequency signals on the basis of normal business signals, adds the function of the message channel, and then completes the adaptation of the wavelength of the optical modules at both ends without affecting the normal business communication functions, and adopts the method of changing the wavelength to perform wavelength adaptation. Adaptation can realize automatic wavelength adaptation function, thereby improving the communication efficiency of optical modules.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some of the drawings of the present application. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the connection relationship between optical communication terminals;

Figure 2 is a schematic diagram of the optical network unit structure;

Figure 3 is a schematic structural diagram of an optical module provided in an embodiment of the present application;

Figure 4 is a schematic diagram of an exploded structure of an optical module provided in an embodiment of the present application;

Figure 5 is a schematic structural diagram of an optical module provided by an embodiment of the present application;

Figure 6 is a schematic diagram of the message channel modulation depth test configuration;

Figure 7 is a flow chart of a message channel-based wavelength adaptation method provided by an embodiment of the present application;

FIG. 8 is a flow chart of another message channel-based wavelength adaptation method provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

One of the core links of optical fiber communication is the conversion of photoelectric signals. Optical fiber communication uses optical signals carrying information to be transmitted in optical fibers/optical waveguides. The passive transmission characteristics of light in optical fibers can be used to achieve low-cost, low-loss information transmission. Information processing equipment such as computers use electrical signals, which requires the mutual conversion of electrical signals and optical signals during the signal transmission process.

Optical modules realize the above-mentioned photoelectric conversion functions in the field of optical fiber communication technology. The mutual conversion of optical signals and electrical signals is the core function of the optical module. The optical module realizes the electrical connection with the external host computer through the golden finger on the circuit board. The main electrical connections include power supply, I2C signal, transmission data signal and grounding. The electrical connection method realized by the golden finger has become the standard in the optical module industry. Standard approach, based on this, the circuit board is a necessary technical feature in most optical modules.

Figure 1 is a schematic diagram of the connection relationship of optical communication terminals. As shown in Figure 1, the connection of optical communication terminals mainly includes optical network unit 100, optical module 200, optical fiber 101 and network cable 103;

One end of the optical fiber is connected to the remote server, and one end of the network cable is connected to the local information processing equipment. The connection between the local information processing equipment and the remote server is completed by the connection between the optical fiber and the network cable; and the connection between the optical fiber and the network cable is made by an optical network with an optical module. Unit completed.

The optical port of the optical module 200 is connected to the optical fiber 101, establishing a bidirectional optical signal connection with the optical fiber; the electrical port of the optical module 200 is connected to the optical network unit 100, and establishing a bidirectional electrical signal connection with the optical network unit; the optical module implements optical signals and electrical signals to establish a connection between the optical fiber and the optical network unit; specifically, the optical signal from the optical fiber is converted into an electrical signal by the optical module and then input into the optical network unit 100. The electrical signal is converted into an optical signal by the optical module and input into the optical fiber. The optical module 200 is a tool for realizing mutual conversion of photoelectric signals and does not have the function of processing data. During the above-mentioned photoelectric conversion process, the information does not change.

The optical network unit has an optical module interface 102 for accessing the optical module and establishing a bidirectional electrical signal connection with the optical module; the optical network unit has a network cable interface 104 for accessing the network cable and establishing a bidirectional electrical signal connection with the network cable; The connection between the module and the network cable is established through the optical network unit. Specifically, the optical network unit transmits the signal from the optical module to the network cable, and transmits the signal from the network cable to the optical module. The optical network unit serves as the host computer of the optical module to monitor the optical module. work.

At this point, a two-way signal transmission channel is established between the remote server and the local information processing equipment through optical fibers, optical modules, optical network units and network cables.

Common information processing equipment includes routers, switches, computers, etc.; the optical network unit is the host computer of the optical module, which provides data signals to the optical module and receives data signals from the optical module. Common optical module host computers also have optical lines. Terminal etc.

Figure 2 is a schematic diagram of the optical network unit structure. As shown in Figure 2, there is a circuit board 105 in the optical network unit 100, and a cage 106 is provided on the surface of the circuit board 105; an electrical connector is provided in the cage 106 for accessing the electrical port of an optical module such as Goldfinger; in A radiator 107 is provided on the cage 106, and the radiator 107 has a fin or other protruding structure to increase the heat dissipation area.

The optical module 200 is inserted into the optical network unit. Specifically, the electrical port of the optical module is inserted into the electrical connector in the cage 106 , and the optical port of the optical module is connected to the optical fiber 101 .

The cage 106 is located on the circuit board and wraps the electrical connectors on the circuit board in the cage; the optical module is inserted into the cage, and the cage fixes the optical module. The heat generated by the optical module is conducted to the cage through the optical module shell, and finally passes through the cage. radiator 107 for diffusion.

FIG. 3 is a schematic structural diagram of an optical module 200 provided in an embodiment of the present application, and FIG. 4 is a schematic exploded structural diagram of the optical module 200 provided in this embodiment. As shown in Figures 3 and 4, the optical module 200 provided by the embodiment of the present application includes an upper housing 201, a lower housing 202, an unlocking handle 203, a circuit board 30, a light emitting component 40 and a light receiving component 50.

The upper case 201 is covered on the lower case 202 to form a package cavity with two openings; the outer contour of the package cavity generally presents a square body. Specifically, the lower case includes a mainboard and two sides located on both sides of the mainboard. Two side plates are arranged vertically; the upper shell includes a cover plate, and the cover plate is closed on the two side plates of the upper shell to form a wrapping cavity; the upper shell can also include a cover plate on both sides of the cover plate and a cover plate. The two side walls arranged vertically are combined with the two side plates to realize that the upper shell is covered with the lower shell.

The two openings can specifically be two openings (204, 205) located at the same end of the optical module, or they can be two openings at different ends of the optical module; one of the openings is the electrical port 204, and the gold finger of the circuit board passes through the electrical port 204. Extend and insert into a host computer such as an optical network unit; the other opening is the optical port 205, which is used for external optical fiber access to connect the optical transmitting component 40 and the optical receiving component 50 inside the optical module; the circuit board 30, the optical transmitting component 40 and the optical Optoelectronic devices such as the receiving component 50 are located in the package cavity.

The assembly method of combining the upper casing and the lower casing is used to facilitate the installation of the circuit board 30, the light emitting component 40, the light receiving component 50 and other devices into the casing. The upper casing and the lower casing form the outermost layer of the optical module. Encapsulated protective shell; the upper shell and lower shell are generally made of metal materials, which is conducive to electromagnetic shielding and heat dissipation; the shell of the optical module is generally not made into an integrated structure, so that when assembling circuit boards and other devices, positioning components, Heat dissipation and electromagnetic shielding structures cannot be installed, which is not conducive to production automation.

The unlocking handle 203 is located on the outer wall of the package cavity/lower housing 202 and is used to achieve a fixed connection between the optical module and the host computer, or to release the fixed connection between the optical module and the host computer.

The unlocking handle 203 has an engaging structure that matches the host computer cage; pulling the end of the unlocking handle can cause the unlocking handle to move relatively on the surface of the outer wall; the optical module is inserted into the cage of the host computer, and the optical module is moved by the engaging structure of the unlocking handle. Fixed in the cage of the host computer; by pulling the unlocking handle, the engaging structure of the unlocking handle moves accordingly, thereby changing the connection relationship between the engaging structure and the host computer, so as to release the engaging relationship between the optical module and the host computer, so that the optical module can be The optical module is pulled out from the cage of the host computer.

The circuit board 30 is provided with circuit traces, electronic components (such as capacitors, resistors, transistors, MOS tubes) and chips (such as microprocessor MCU, laser driver chip, limiting amplifier, clock data recovery CDR, power management chip, data Processing chip DSP), etc.

The circuit board 30 connects the electrical devices in the optical module together according to the circuit design through circuit wiring to realize electrical functions such as power supply, electrical signal transmission, and grounding.

The circuit board 30 is generally a rigid circuit board. Due to its relatively hard material, the rigid circuit board can also perform a load-bearing function. For example, the rigid circuit board can smoothly carry chips; when the light-emitting component 40 and the light-receiving component 50 are located on the circuit board, The rigid circuit board can also provide a smooth load; the rigid circuit board can also be inserted into the electrical connector in the host computer cage. Specifically, metal pins/gold fingers are formed on the end surface of one side of the rigid circuit board for connection with the electrical connector. Connector connections; these are inconvenient to achieve with flexible circuit boards.

Flexible circuit boards are also used in some optical modules as a supplement to rigid circuit boards; flexible circuit boards are generally used in conjunction with rigid circuit boards. For example, flexible circuit boards can be used to connect rigid circuit boards and optical transceiver devices.

The light emitting component 40 and the light receiving component 50 are respectively used to transmit and receive optical signals. In this embodiment, the light emitting component 40 is packaged in a housing. The circuit board 30 extends into the housing of the light emitting component 40 and is electrically connected to the components in the housing through metal wires, for example, through gold wires. connect. Of course, in other embodiments, the light emitting component 40 may also be packaged in a non-hermetic manner.

Furthermore, during the operation of the optical module, this embodiment is configured to emit relatively high-frequency data optical signals based on the data electrical signals from the optical line terminal, so as to maintain the original external data transmission service of the optical line terminal. At the same time, The optical module also emits a relatively low-frequency control optical signal based on non-data electrical signals (that is, signals not used for normal transmission services) to send control information to the opposite end optical module to achieve remote control without interrupting normal services. The system transmits control data to enable the optical module at the opposite end to adjust the rate mode.

Since the optical module and the optical module at the opposite end are connected externally using an optical fiber, the data optical signal and the control optical signal are mixed in the same beam of light and transmitted using the same optical fiber. In order to distinguish different signals, this embodiment sets The data light signal and the control light signal have different frequencies. In terms of its implementation, the microprocessor, light-emitting component and light-receiving component in the optical module can be set to control the light-emitting component to superimpose a low-frequency modulation signal (control signal) on the high-frequency signal (data light signal) it emits. Optical signal), this embodiment calls the low-frequency modulated signal a low-frequency message channel.

Figure 5 is a schematic structural diagram of an optical module provided by an embodiment of the present application. As shown in Figure 5, the optical module provided by the embodiment of the present application is a BIDI optical module used in pairs. The BIDI optical module includes a first optical module (head-end optical module) 300 and a second optical module (tail-end optical module). 200. The first optical module 300 is applied to the system side, and the second optical module 200 is applied to the user end. The system end and the user end realize communication connection through the first optical module 300 and the second optical module 200.

Specifically, the first optical module 300 includes an optical transmitting component, an optical receiving component and an MCU. The optical transmitting component is used to transmit a first optical signal carrying a low-frequency message channel signal, and the optical receiving component is used to receive a second optical signal from the outside; The MCU is electrically connected to the optical transmitting component and the optical receiving component, and is used to issue instructions for changing the wavelength and wavelength information. The wavelength information is loaded into the first optical signal in the form of a low-frequency message. The optical transmitting component emits the first optical signal corresponding to the wavelength information according to the instruction. optical signal; and determining whether to change the wavelength of the first optical signal again according to the low-frequency message channel signal loaded on the second optical signal.

In this embodiment of the present application, the first optical module 300 is a colored light tunable optical module with a wavelength tunable function. The number of channels can be configured through software, and the software controls channel switching to switch the optical module to different operating bands. Colored light Tunable-BIDI (Tunable-Bidirectionnal, single-fiber bidirectionally adjustable) optical module refers to a single-fiber bidirectional optical module. The BIDI optical module adopts the BOSA scheme. The wavelengths of transmission and reception are different. BIDI modules are used in pairs, such as First Light The emitting wavelength of the module 300 is λ1 and the receiving wavelength is λ2; the emitting wavelength of the first optical module 300 is λ2 and the receiving wavelength is λ1.

Colored light Tunable-BIDI optical modules are usually paired modules with tunable emission. For example, the first optical module emits a tunable wavelength from λ1-1 to N-1, and the second optical module emits a tunable wavelength from λ1-2 to N. -2. Reception is usually broadband reception. For example, a module that emits adjustable wavelengths from λ1-1 to N-1 can receive all light with wavelengths from λ1-2 to N-2; the other end emits adjustable wavelengths from λ1-2 to N. -2 module can receive all light with wavelengths from λ1-1 to N-1.

The wavelength of the first optical signal emitted by the first light emitting component 320 of the first optical module 300 can be controlled and changed by the first MCU 310 . If the first light emitting component 320 is installed on a semiconductor refrigerator, the first MCU 310 can adjust the wavelength of the optical signal emitted by the first light emitting component 320 by controlling the temperature of the semiconductor refrigerator; or, the first light emitting component 320 can be combined with other light emitting components. The device forms a wavelength resonant cavity, and the first MCU 310 adjusts the wavelength of the optical signal emitted by the first light emitting component 320 by controlling the wavelength resonant cavity.

In the embodiment of the present application, when the first optical transmitting component 320 is controlled by the first MCU 310 to transmit the first optical signal of a certain wavelength, it loads a low-frequency signal on the basis of the normal service signal, adds the function of the message channel, and transmits it through the message channel. The wavelength signal of the first optical signal. In this way, when the first optical module 300 sends the first optical signal to the second optical module 200, the second optical module 200 can obtain the wavelength information of the first optical signal, thereby determining whether the wavelength information of the first optical module 300 is consistent with the second optical module 200. Whether the wavelength information matches, thereby realizing the wavelength adaptive function.

In order to allow the message channel to load the wavelength information of the first optical signal, this application carries a low-frequency message channel signal in the first optical signal emitted by the first optical transmitting component 320. The low-frequency message channel signal is used to load the wavelength information of the first optical signal. wavelength information. Specifically, the first light emitting component 320 includes a laser chip, which is driven by a bias current to generate an optical signal. In order to carry a low-frequency message channel signal, a low-frequency signal is added to the bias current BIAS DC, and the DC negative voltage is Paranically, a low-frequency modulation signal is added to perform data modulation on the low-frequency signal to form a low-frequency message channel signal.

The optical module provided by the embodiment of the present application is actually applied to 10Gbps or 25Gbps signals, that is, the optical signal emitted by the first optical transmitting component 320 is a high-frequency data signal of 10Gbps or 25Gbps. On the basis of the 10Gbps or 25Gbps signal, a low-frequency signal is added. The 10Gbps or 25Gbps signal is a normal service signal. While not occupying the business, another low-frequency signal is added to perform other functions. In this embodiment of the present application, the low-frequency signal may be a 50Kbps low-frequency signal.

Specifically, when selecting the frequency of the low-frequency signal, it can be calculated based on the modulation depth of the message channel. The modulation depth of the message channel is positioned as the difference between the "1" level optical power and the "0" level optical power, divided by 2 of the average optical power. times, calculated from the following formula (1):

Among them, P(1)——the average optical power of the "1" level of the message channel, in mW;

P(0)——The average optical power of the "0" level of the message channel, in mW.

Figure 6 is a schematic diagram of the message channel modulation depth test configuration. As shown in Figure 6, the corresponding optical powers of P(1) and P(0) can be measured accordingly. That is, the optical signal emitted by the first light emitting component 320 undergoes photoelectric conversion through the detector to convert the optical signal into an electrical signal. The electrical signal is filtered through a low-pass filter. On the one hand, the filtered electrical signal is passed through an oscilloscope to obtain the eye diagram of the message channel. , the message channel eye diagram is a high-frequency data signal; on the other hand, the filtered electrical signal is extracted through the message channel clock extraction module to obtain the clock signal. According to the clock signal and the waveform diagram, the average optical power and the "1" level of the message channel are obtained. The average optical power of the message channel "0" level.

After the first optical module 300 sends the first optical signal carrying the low-frequency message channel signal to the second optical module 200, it needs to stay for a period of time, such as 3 seconds, to wait for feedback from the second optical module 200. When the first optical module 300 receives the second optical signal within the preset time, the first optical receiving component 330 converts the second optical signal into an electrical signal, and at the same time, the first MCU 310 demodulates the low-frequency message loaded on the second optical signal. channel signal, and determine whether to change the wavelength of the first optical signal based on the low-frequency message channel signal.

When the first MCU 310 determines that the wavelength of the first optical signal needs to be changed based on the demodulated low-frequency message channel signal, the first MCU 310 changes the wavelength of the first optical signal by adjusting the temperature of the semiconductor refrigerator or adjusting the wavelength resonant cavity, and then Modify the wavelength information of the first optical signal, load the modified wavelength information to the low-frequency message channel signal, control the first optical transmitting component 320 to transmit the first optical signal carrying the new low-frequency message channel signal to the second optical module 200, and Wait for feedback from the second optical module 200 again.

In the embodiment of the present application, the first MCU 310 controls to change the wavelength of the first optical signal emitted by the first optical emitting component 320 until the first MCU 310 determines that the wavelength does not need to be changed based on the low-frequency message channel signal loaded on the second optical signal, and then stops. The wavelength of the first optical signal is changed, and the wavelength at this time is selected to perform link communication between the first optical module 300 and the second optical module 200 .

In this embodiment of the present application, the low-frequency message channel signal loaded on the second optical signal can indicate the return wavelength information of the second optical module 200, and can also indicate whether the second optical module 200 has optical feedback information. When the low-frequency message channel information loaded on the second optical signal indicates the return wavelength information of the second optical module 200, the first MCU 310 determines whether to change the first optical signal based on the return wavelength information and the wavelength information of the first optical signal. Wavelength, if the returned wavelength information matches the wavelength information of the first optical signal, then the change of the wavelength of the first optical signal is terminated, and the wavelength at this time is selected for link communication; the returned wavelength information matches the wavelength of the first optical signal. If the information does not match, change the wavelength of the first optical signal to the next wavelength, send the first optical signal of the new low-frequency message channel signal to the second optical module 200, and wait for feedback from the second optical module 200.

When the low-frequency message channel signal loaded on the second optical signal indicates whether there is optical feedback information, the first MCU 310 determines whether to change the wavelength of the first optical signal based on the presence or absence of optical feedback information. For example, the low-frequency message channel signal indicates whether there is optical feedback information. , then stop changing the wavelength of the first optical signal, and select the wavelength at this time for link communication; the low-frequency message channel signal indicates that there is no optical feedback information, then change the wavelength of the first optical signal to the next wavelength, and send the signal to the second optical module 200 sends the first optical signal of the new low-frequency message channel signal and waits for feedback from the second optical module 200 .

In the embodiment of the present application, the second optical module 200 includes an optical receiving component, an optical transmitting component and an MCU. The optical receiving component is used to receive the first optical signal carrying the message channel signal, and the optical transmitting component is used to transmit the first optical signal carrying the low-frequency message channel. Second optical signal; MCU is electrically connected to the optical transmitting component and the optical receiving component, and is used to generate response information according to the low-frequency message channel signal loaded on the first optical signal, and load the response information to the low-frequency message channel signal to control the optical transmitting component A second optical signal carrying the low frequency message channel signal is emitted.

The second optical receiving component 230 of the second optical module 200 receives the first optical signal emitted by the first optical module 300. The first optical signal is loaded with an optical signal of a low-frequency message channel signal on the high-frequency signal. The high-frequency signal is normal. The service signal and the low-frequency message channel signal are used to indicate the wavelength information of the first optical signal. The second optical receiving component 230 converts the first optical signal into an electrical signal. At the same time, the second MCU 210 demodulates the low-frequency message channel signal in the first optical signal to obtain the wavelength information of the first optical signal. According to the wavelength of the first optical signal The information generates response information. The response information may be return wavelength information. The return wavelength information is loaded into the low-frequency message channel signal, and the second optical transmitting component 220 is controlled to emit a second optical signal carrying the low-frequency message channel signal.

After the first optical module 300 receives the second optical signal, the first MCU 310 demodulates the low-frequency message channel signal in the second optical signal, obtains the return wavelength information of the second optical signal, and then compares the wavelength information of the first optical signal. and the returned wavelength information of the second optical module 200 to determine whether the wavelength information matches. If they match, it means that the wavelength information of the first optical signal is compatible with the wavelength information of the second optical module 200, and link alignment can be performed based on the wavelength. Pass; if they do not match, it means that the wavelength information of the first optical signal is not suitable for the wavelength information of the second optical module 200, and the wavelength of the first optical signal needs to be changed.

In the embodiment of the present application, in order to facilitate the transmission of the first optical signal emitted by the first optical module 300 to the second optical module 200, and the transmission of the second optical signal emitted by the second optical module 200 to the first optical module 300, in The first arrayed waveguide grating 400 and the second arrayed waveguide grating 500 are disposed between the first optical module 300 and the second optical module 200. The first arrayed waveguide grating 400 is connected to the first optical module 300, and the second arrayed waveguide grating 500 is connected to the first optical module 300. The second optical module 200 is connected, and the first arrayed waveguide grating 400 and the second arrayed waveguide grating 500 are connected through an optical fiber 101 .

The first arrayed waveguide grating 400 and the second arrayed waveguide grating 500 have the same wavelength characteristics and have N channels. Each channel allows two wavelengths of light to pass through, which facilitates the application of BIDI optical modules. The characteristics of the arrayed waveguide grating are: channel 1 can only pass light with wavelengths λ1-1 and λ1-2, and channel N can only pass light with wavelengths λN-1 and λN-2.

Arrayed waveguide grating AWG and thin-film filters (TFF) are the two most commonly used WDM (Wavelength Division Multiplexing, wavelength division multiplexing) technologies, which combine multiple channels and different wavelengths of light into a single optical fiber. , thereby improving the propagation efficiency of the optical fiber network. In the embodiment of the present application, the first arrayed waveguide grating 400 applied to the system side can combine multiple lights of different wavelengths into a single optical fiber for transmission to the user end, and the second arrayed waveguide grating 500 applied to the user end can combine light of multiple different wavelengths into a single optical fiber. Multiple light of different wavelengths transmitted by a single optical fiber is demultiplexed, and light of different wavelengths is received through different channels.

During use, if the first optical module 300 is connected to the channel 1-1 of the first arrayed waveguide grating 400, the wavelength of the emitted light of this optical module is λ1-1 and the wavelength of the received light is λ1-2; if the second optical module 200 receives the Channel 2-1 of the two-array waveguide grating 500, the wavelength of the emitted light of this optical module is λ1-2, and the wavelength of the received light is λ1-1. At this time, communication between the first optical module 300 and the second optical module 200 can be realized, and there is no signal transmission between modules working at other wavelengths and the two optical modules, and there is no influence on each other.

The optical module provided by the embodiment of the present application is a colored light Tunable-BIDI optical module used in pairs. Both optical modules include an optical transmitting component, an optical receiving component and an MCU. The first MCU of the first optical module transmits light to the first optical module. The transmitting component sends an instruction to change the wavelength and wavelength information. The wavelength information is loaded into the first optical signal emitted by the optical transmitting component in the form of a low-frequency message. The optical transmitting component emits the first optical signal carrying the low-frequency message channel signal to the second optical signal according to the instruction. module; the second optical receiving component of the second optical module receives the first optical signal, and the second MCU demodulates the low-frequency message channel signal carried by the first optical signal to obtain the wavelength information of the first optical signal. According to the The wavelength information generates response information, loads the response information into the low-frequency message channel signal, and controls the second optical transmitting component to transmit a second optical signal carrying the low-frequency message channel signal to the first optical module; the first optical module receives the first optical signal The component receives the second optical signal, the first MCU demodulates the low-frequency message channel signal carried by the second optical signal, obtains response information, and determines whether to change the wavelength of the first optical signal based on the response information. This application loads low-frequency signals on the basis of normal business signals, adds the function of the message channel, and then completes the adaptation of the wavelength of the optical modules at both ends without affecting the normal business communication functions, and adopts the method of changing the wavelength to perform wavelength adaptation. Adaptation realizes the automatic wavelength adaptation function, thus improving the interconnection efficiency of the optical module.

Based on the optical modules described in the above embodiments, embodiments of the present application also provide a message channel-based wavelength adaptation method, which is applied to the optical modules described in the above embodiments to realize automated wavelength adaptation of two optical modules. Adaptive communication.

FIG. 7 is a flow chart of a message channel-based wavelength adaptation method provided by an embodiment of the present application. As shown in Figure 7, the message channel-based wavelength adaptation method provided by the embodiment of the present application includes:

S100: Send a first optical signal, where the first optical signal is an optical signal loaded with a low-frequency message channel signal on a high-frequency signal. The high-frequency signal is a normal service signal, and the low-frequency message channel signal is used to indicate the status of the first optical signal. wavelength information.

S110: Receive the second optical signal from the outside.

S120: Determine whether to change the wavelength of the first optical signal based on the low-frequency message channel signal loaded on the second optical signal.

In this embodiment of the present application, after the first optical module used in the system is powered on, the first MCU of the first optical module sends a command to change the wavelength and wavelength information. The wavelength information is loaded into the first optical signal in the form of a low-frequency message. The first light emitting component is controlled to emit a first optical signal corresponding to the wavelength information. After the first optical module sends the first optical signal, it waits for feedback from the second optical module within a preset time, that is, the first optical receiving component of the first optical module receives the second optical signal sent by the second optical module, and the first MCU Demodulate the low-frequency message channel signal carried by the second optical signal to obtain response information, and determine whether to change the wavelength of the first optical signal based on the response information.

When the first MCU determines that the wavelength of the first optical signal needs to be changed based on the demodulated low-frequency message channel signal, the first MCU changes the wavelength of the first optical signal by adjusting the temperature of the semiconductor refrigerator or adjusting the wavelength resonant cavity, and then Modify the wavelength information of the first optical signal, load the modified wavelength information to the low-frequency message channel signal, control the first optical transmitting component to transmit the first optical signal carrying the new low-frequency message channel signal to the second optical module, and wait again Feedback from the second optical module.

The first MCU controls to change the wavelength of the first optical signal emitted by the first optical emitting component until the first MCU determines to terminate the change based on the low-frequency message channel signal loaded on the second optical signal, then stops changing the wavelength of the first optical signal, and selects The wavelength at this time enables link communication between the first optical module and the second optical module.

In this embodiment of the present application, the low-frequency message channel signal loaded on the second optical signal can indicate the return wavelength information of the second optical module 200, and can also indicate whether the second optical module 200 has optical feedback information. When the low-frequency message channel information loaded on the second optical signal indicates the return wavelength information of the second optical module 200, the first MCU 310 determines whether to change the first optical signal based on the return wavelength information and the wavelength information of the first optical signal. Wavelength, if the returned wavelength information matches the wavelength information of the first optical signal, then the change of the wavelength of the first optical signal is terminated, and the wavelength at this time is selected for link communication; the returned wavelength information matches the wavelength of the first optical signal. If the information does not match, change the wavelength of the first optical signal to the next wavelength, send the first optical signal of the new low-frequency message channel signal to the second optical module 200, and wait for feedback from the second optical module 200.

When the low-frequency message channel signal loaded on the second optical signal indicates whether there is optical feedback information, the first MCU 310 determines whether to change the wavelength of the first optical signal based on the presence or absence of optical feedback information. For example, the low-frequency message channel signal indicates whether there is optical feedback information. , then stop changing the wavelength of the first optical signal, and select the wavelength at this time for link communication; the low-frequency message channel signal indicates that there is no optical feedback information, then change the wavelength of the first optical signal to the next wavelength, and send the signal to the second optical module. 200 sends the first optical signal of the new low-frequency message channel signal and waits for feedback from the second optical module 200 .

FIG. 8 is a flow chart of another message channel-based wavelength adaptation method provided by an embodiment of the present application. As shown in Figure 8, the message channel-based wavelength adaptation method provided by the embodiment of the present application includes:

S200: Receive the first optical signal from the outside.

S210: Demodulate the low-frequency message channel signal loaded on the first optical signal, and obtain the wavelength information of the first optical signal.

S220: Generate response information according to the wavelength information of the first optical signal.

S230: Load the response information into the low-frequency message channel signal, and transmit the second optical signal carrying the low-frequency message channel signal.

The second optical receiving component of the second optical module receives the first optical signal emitted by the first optical module. The first optical signal is loaded with an optical signal of a low-frequency message channel signal on the high-frequency signal. The high-frequency signal is a normal service signal. The low-frequency message channel signal is used to indicate wavelength information of the first optical signal. The second optical receiving component converts the first optical signal into an electrical signal, and at the same time, the second MCU demodulates the low-frequency message channel signal in the first optical signal to obtain the wavelength information of the first optical signal. According to the wavelength information of the first optical signal Generate response information, which may be return wavelength information, load the return wavelength information into the low-frequency message channel signal, and control the second optical transmitting component 220 to emit a second optical signal carrying the low-frequency message channel signal.

After the first optical module 300 receives the second optical signal, the first MCU 310 demodulates the low-frequency message channel signal in the second optical signal, obtains the return wavelength information of the second optical signal, and then compares the wavelength information of the first optical signal. and the wavelength information of the second optical module to determine whether the wavelength information matches. If they match, it means that the wavelength information of the first optical signal is compatible with the wavelength information of the second optical module, and the link can be interconnected based on the wavelength; if not Matching means that the wavelength information of the first optical signal is not suitable for the wavelength information of the second optical module, and the wavelength of the first optical signal needs to be changed.

In the application of the message channel-based wavelength adaptation method provided by the embodiment of the present application, the first optical module sends a first optical signal to the second optical module. The first optical signal is a high-frequency signal loaded with The optical signal of the low-frequency message channel signal, the high-frequency signal is a normal service signal, and the low-frequency message channel signal is used to indicate the wavelength information of the first optical signal; the second optical module receives the first optical signal sent by the first optical module and demodulates The low-frequency message channel signal loaded on the first optical signal obtains the wavelength information of the first optical signal, generates response information according to the wavelength information of the first optical signal, and loads the response information into the low-frequency message channel signal to control the second optical module Transmit a second optical signal carrying a low-frequency message channel signal to the first optical module; the first optical module receives the second optical signal sent by the second optical module, demodulates the low-frequency message channel signal carried by the second optical signal, and obtains response information, Determine whether to change the wavelength of the first optical signal based on the response information. This application loads low-frequency signals on the basis of normal business signals, adds the function of the message channel, and then completes the adaptation of the wavelength of the optical modules at both ends without affecting the normal business communication functions, and adopts the method of changing the wavelength to perform wavelength adaptation. Adaptation realizes the automatic wavelength adaptation function, thus improving the interconnection efficiency of the optical module.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims (10)

1. An optical module, comprising:

an optical transmitting assembly configured to transmit a first optical signal carrying a low frequency message channel signal;

an optical receiving assembly configured to receive a second optical signal from the outside;

the MCU is electrically connected with the light emitting component and the light receiving component and is configured to send out a wavelength changing instruction and wavelength information, the wavelength information is loaded to the first optical signal in a low-frequency message mode, and the light emitting component emits a first optical signal corresponding to the wavelength information according to the instruction; and judging whether to change the wavelength of the first optical signal again according to the low-frequency message channel signal loaded on the second optical signal.

2. The optical module of claim 1, wherein the optical transmitting assembly is further configured to receive a bias current loaded with a low frequency signal, and generate optical signals of different wavelengths according to the bias current, the optical signals carrying both data light and a low frequency message channel signal.

3. The optical module of claim 1, wherein the MCU is further configured to determine whether to change the wavelength of the first optical signal again based on the backhaul wavelength information indicated by the low frequency message channel signal on the second optical signal and the wavelength information of the first optical signal.

4. The optical module of claim 1, wherein the MCU is further configured to determine whether to again change the wavelength of the first optical signal based on no optical feedback indicated by a low frequency message channel signal on the second optical signal.

5. An optical module, comprising:

a light receiving assembly configured to receive a first light signal from the outside;

an optical emission assembly configured to emit a second optical signal;

the MCU is electrically connected with the light receiving component and the light transmitting component and is configured to demodulate a low-frequency message channel signal of the first optical signal and generate response information according to the low-frequency message channel signal; and loading the response information to the low-frequency message channel signal, and controlling the light emitting component to emit a second light signal carrying the low-frequency message channel signal.

6. The optical module of claim 5, wherein the MCU is further configured to generate response information indicative of the backhaul wavelength information.

7. A message channel-based wavelength adaptation method, the method comprising:

transmitting a first optical signal, wherein the first optical signal is an optical signal with a low-frequency message channel signal loaded on a high-frequency signal, the high-frequency signal is a normal service signal, and the low-frequency message channel signal is used for indicating wavelength information of the first optical signal;

receiving a second optical signal from the outside;

and judging whether to change the wavelength of the first optical signal according to the low-frequency message channel signal loaded on the second optical signal.

8. The message channel-based wavelength adaptation method according to claim 7, wherein determining whether to change the wavelength of the first optical signal based on the low frequency message channel signal loaded on the second optical signal comprises:

demodulating the low-frequency message channel signal loaded by the second optical signal;

judging whether the low-frequency message channel signal indicates back wavelength information;

and if the low-frequency message channel signal indicates the return wavelength information, judging whether to change the wavelength of the first optical signal according to whether the return wavelength information is consistent with the wavelength information of the first optical signal.

9. The message channel-based wavelength adaptation method according to claim 7, wherein determining whether to change the wavelength of the first optical signal based on the low frequency message channel signal loaded on the second optical signal comprises:

demodulating the low-frequency message channel signal loaded by the second optical signal;

judging whether the low-frequency message channel signal indicates optical feedback or not;

if the low frequency message channel signal is not indicative of optical feedback, changing the wavelength of the first optical signal.

10. A message channel-based wavelength adaptation method, the method comprising:

receiving a first optical signal from the outside;

demodulating a low-frequency message channel signal loaded on the first optical signal to obtain wavelength information of the first optical signal;

generating response information according to the wavelength information of the first optical signal;

and loading the response information to the low-frequency message channel signal, and transmitting a second optical signal carrying the low-frequency message channel signal.