WO2023155057A1

WO2023155057A1 - Optical equalizer and optical signal processing method

Info

Publication number: WO2023155057A1
Application number: PCT/CN2022/076404
Authority: WO
Inventors: 周雷; 吴彤宇; 李芮
Original assignee: 华为技术有限公司
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2023-08-24

Abstract

The present application provides an optical equalizer and an optical signal processing method, which can meet the requirement of flexibly setting coefficients in practical application. The optical equalizer of the present application comprises: a control module, an adjustment module, an optical switch, a first conversion module, and a second conversion module, wherein the control module may send a first control signal to the adjustment module and send a second control signal to the optical switch; after receiving an optical signal and the first control signal, the adjustment module may adjust the intensity of the optical signal on the basis of the first control signal; after receiving the adjusted optical signal and the second control signal, the optical switch may send the adjusted optical signal to the first conversion module or the second conversion module on the basis of the second control signal; and if the first conversion module has received the adjusted optical signal, the first conversion module converts the adjusted optical signal into a first electrical signal, and if the second conversion module receives the adjusted optical signal, the second conversion module converts the adjusted optical signal into a second electrical signal, wherein the second electrical signal and the first electrical signal have opposite polarities.

Description

Optical equalizer and optical signal processing method

technical field

The present application relates to the field of optical communication, in particular to an optical equalizer and an optical signal processing method.

Background technique

In an optical network, the transmission of optical signals is realized through optical fiber links between the sending end and the receiving end. Due to effects such as dispersion of the optical fiber, interference signals may be included in the optical signal, affecting the quality of the optical signal received at the receiving end. In order to ensure the quality of the optical signal, an optical equalizer can be installed in the receiving end to interfere with the signal in the optical domain to obtain an optical signal with better quality. Then, the optical signal can be converted into an electrical signal, and the electrical signal can be sent to other devices in the receiving end for subsequent processing, so as to complete the communication between the sending end and the receiving end.

The working principle of the optical equalizer is as follows: by setting a set of coefficients and multiplying the intensity of the received optical signal by the set of coefficients, an adjusted optical signal is obtained. Since this group of coefficients can include positive values, negative values and zero, and only positive values and zero (light intensity) in the optical field, there is no negative value, in order to make the optical signal can be realized on the positive and negative values (polarity) In related technologies, an optical equalizer usually includes an adjustment module and a conversion module, wherein the adjustment module can multiply the intensity of the optical signal by the absolute value of a certain coefficient to obtain an adjusted optical signal, and the conversion module can adjust the The final optical signal is converted into an electrical signal of a certain polarity, which corresponds to the positive or negative of the coefficient (for example, when the coefficient is positive, the polarity of the electrical signal is positive, and when the coefficient is negative value, the polarity of the electrical signal is negative). In this way, the optical equalizer realizes the conversion of the optical signal between positive and negative values.

In the optical equalizer of the related art, since the connection relationship between the adjustment module and the conversion module is fixed, the combination of the two can only realize the adjustment on the fixed polarity, that is, the optical signal can only be adjusted to a positive value, Or it can only adjust the optical signal to a negative value, which cannot meet the needs of flexible configuration coefficients in practical applications.

Contents of the invention

Embodiments of the present application provide an optical equalizer and an optical signal processing method, which can meet the requirement for flexible configuration of coefficients in practical applications.

A first aspect of the embodiments of the present application provides an optical equalizer, which includes: a control module, an adjustment module, an optical switch, a first conversion module, and a second conversion module.

When the optical equalizer is working, the control module can calculate the coefficient of the optical equalizer, and the coefficient can be positive or negative. After obtaining the optical equalizer coefficient, the control module can divide the optical equalizer coefficient into two parts, the first part is the amplitude (absolute value) of the optical equalizer coefficient, and the second part is the polarity (sign) of the optical equalizer coefficient , then, the control module can generate a first control signal corresponding to the magnitude of the optical equalizer coefficient and a second control signal corresponding to the polarity of the optical equalizer coefficient, and send the first control signal to the adjustment module, and the second The control signal is sent to the optical switch. Wherein, the first control signal and the second control signal may be voltage signals or current signals.

After the adjustment module receives the first control signal, it can determine the magnitude of the coefficient of the optical equalizer based on the magnitude of the first control signal, so as to obtain the magnitude of the coefficient of the optical equalizer. Then, the adjustment module can multiply the intensity of the received optical signal by the magnitude of the coefficient of the optical equalizer to obtain the adjusted optical signal.

After receiving the second control signal, the optical switch can determine to conduct the connection between it and the first conversion module or the second conversion module based on the polarity (or magnitude) of the second control signal. The connection between one conversion module sends the adjusted optical signal to the first conversion module, and if the optical switch conducts the connection with the second conversion module, the adjusted optical signal is sent to the second conversion module.

If the first conversion module receives the adjusted optical signal, it can perform photoelectric conversion on the adjusted optical signal to obtain the first electrical signal; if the second conversion module receives the adjusted optical signal, it can convert the adjusted optical signal The signal is photoelectrically converted to obtain a second electrical signal, which is opposite in polarity to the first electrical signal, for example, the first electrical signal is a positive current signal, and the second electrical signal is a negative current signal, and so on. After the first conversion module obtains the first electrical signal or the second conversion module obtains the second electrical signal, since the first conversion module and the second conversion module can share one output terminal, the first electrical signal or the second electrical signal passes through the output At the end, the output of the entire optical equalizer is generated.

The above optical equalizer includes a control module, an adjustment module, an optical switch, a first conversion module and a second conversion module. When the optical equalizer is in working state, the control module can send the first control signal to the adjustment module, and send the second control signal to the optical switch. After the adjustment module receives the optical signal from the outside and the first control signal from the control module, it can adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal. After receiving the adjusted optical signal from the adjustment module and the second control signal from the control module, the optical switch can send the adjusted optical signal to the first conversion module or the second conversion module based on the second control signal. If the first conversion module receives the adjusted optical signal, it converts the adjusted optical signal into the first electrical signal; if the second conversion module receives the adjusted optical signal, it converts the adjusted optical signal into the first electrical signal. Two electrical signals, the polarity of the second electrical signal is opposite to that of the first electrical signal. It can be seen that due to the existence of the optical switch, the connection relationship between the adjustment module and the conversion module is not fixed, and the optical switch can make the adjustment module and the first conversion module indirectly connected, so that the two can realize the adjustment of the optical signal on the positive value, The optical switch can also indirectly connect the adjustment module and the second conversion module, so that the two can adjust the optical signal to a negative value, so it can meet the demand for flexible configuration coefficients in practical applications.

In a possible implementation, the control module is further configured to modify the size of the first control signal based on the output of the optical equalizer, the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal, and the first control signal The size of affects the degree of adjustment. In the aforementioned implementation, the control module can also calculate new optical equalizer coefficients according to the output of the optical equalizer. If the new optical equalizer coefficients have a change in magnitude compared with the previous optical equalizer coefficients, the control module The module can correspondingly modify the size of the first control signal to obtain a new first control signal, and send it to the adjustment module, so as to change the degree of adjustment of the intensity of the optical signal by the adjustment module.

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, an optical switch, configured to: send an adjusted optical signal to the first conversion module based on the third electrical signal; or, Based on the fourth electrical signal, the adjusted optical signal is sent to the second conversion module. In the aforementioned implementation manner, after receiving the second control signal, the optical switch can determine to conduct the connection with the first conversion module or the second conversion module based on the polarity (or magnitude) of the second control signal, if the second The control signal is the third electrical signal (for example, the third electrical signal is a positive electrical signal, etc.), and the optical switch conducts the connection between it and the first conversion module, and sends the adjusted optical signal to the first conversion module. signal, if the second control signal is the fourth electrical signal (for example, the fourth electrical signal is a negative electrical signal, etc.), the optical switch conducts the connection between it and the second conversion module, and sends a signal to the second conversion module Send the adjusted optical signal.

In a possible implementation manner, the second control signal is the third electrical signal or the fourth electrical signal, and the control module is further configured to: based on the output of the optical equalizer, convert the signal sent to the optical switch from the third electrical signal to is replaced with the fourth electrical signal, so that the optical switch sends the adjusted optical signal to the second conversion module based on the fourth electrical signal; or, based on the output of the optical equalizer, the signal sent to the optical switch is changed from the fourth electrical signal It is replaced with the third electrical signal, so that the optical switch sends the adjusted optical signal to the first conversion module based on the third electrical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal. In the aforementioned implementation, the control module can also calculate new optical equalizer coefficients according to the output of the optical equalizer. If the new optical equalizer coefficients have a change in polarity compared with the previous optical equalizer coefficients, If the signal currently output to the optical switch is the third electrical signal, the control module replaces the signal output to the optical switch with the fourth electrical signal, and if the signal currently output to the optical switch is the fourth electrical signal, the control module replaces Then the signal output to the optical switch is replaced with the third electrical signal, so as to reverse the polarity of the electrical signal obtained based on the optical signal.

In a possible implementation manner, the polarity of the third electrical signal is opposite to that of the fourth electrical signal, or, the third electrical signal is a non-zero electrical signal, and the fourth electrical signal is zero.

In a possible implementation manner, the adjustment module is an optical modulator.

In a possible implementation manner, the first conversion module and the second conversion module are photodiodes.

A second aspect of the embodiments of the present application provides an optical equalizer, and the optical equalizer includes: a control module, an optical switch, a first adjustment module, a second adjustment module, a first conversion module, and a second conversion module.

When the optical equalizer is working, the control module calculates the coefficient of the optical equalizer, which can be positive or negative. After obtaining the optical equalizer coefficients, the control module can divide the optical equalizer coefficients into two parts, the first part is the amplitude of the optical equalizer coefficients, and the second part is the polarity of the optical equalizer coefficients, then the control module can generate The first control signal corresponding to the magnitude of the equalizer coefficient generates a second control signal corresponding to the polarity of the optical equalizer coefficient, and sends the first control signal to the first adjustment module and the second adjustment module, and the second control signal The signal is sent to the optical switch.

After the optical switch receives the second control signal, it can determine to conduct the connection between it and the first adjustment module or the second adjustment module based on the polarity (or magnitude) of the second control signal. When the connection between the adjustment modules is adjusted, an optical signal is sent to the first adjustment module, and if the optical switch conducts the connection with the second adjustment module, an optical signal is sent to the second adjustment module.

After the first adjustment module and the second adjustment module receive the first control signal, they can determine the magnitude of the optical equalizer coefficient based on the magnitude of the first control signal, so as to obtain the magnitude of the optical equalizer coefficient. If the first adjustment module receives the optical signal from the optical switch, it can multiply the intensity of the received optical signal by the amplitude of the coefficient of the optical equalizer to obtain the adjusted optical signal. If the second adjustment module receives the optical signal from the optical switch, it can also multiply the intensity of the received optical signal by the amplitude of the coefficient of the optical equalizer to obtain the adjusted optical signal.

If the first conversion module receives the adjusted optical signal, it can perform photoelectric conversion on the adjusted optical signal to obtain the first electrical signal; if the second conversion module receives the adjusted optical signal, it can convert the adjusted optical signal The signal is photoelectrically converted to obtain a second electrical signal, which is opposite in polarity to the first electrical signal, for example, the first electrical signal is a positive current signal, and the second electrical signal is a negative current signal, and so on. After the first conversion module obtains the first electrical signal or the second conversion module obtains the second electrical signal, since the first conversion module and the second conversion module can share one output terminal, the first electrical signal or the second electrical signal passes through the output At the end, the output of the current round of the entire optical equalizer will be generated.

The above optical equalizer includes a control module, an optical switch, a first adjustment module, a second adjustment module, a first conversion module and a second conversion module. When the optical equalizer is in the working state, the control module can send the first control signal to the first adjustment module and the second adjustment module, and send the second control signal to the optical switch. After receiving the optical signal from the outside and the second control signal from the control module, the optical switch can send an optical signal to the first adjustment module or the second adjustment module based on the second control signal. If the first adjustment module receives the optical signal from the optical switch, it adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the first conversion module, so that the first conversion module converts the adjusted The optical signal is converted into a first electrical signal. If the second adjustment module receives the optical signal from the optical switch, it adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the second conversion module, so that the second conversion module converts the adjusted The optical signal is converted into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal. It can be seen that due to the existence of the optical switch, there are multiple paths for transmitting optical signals. The optical switch can make the optical signal go through the path formed by the first adjustment module and the first conversion module. The optical switch can also make the optical signal go through the path formed by the second adjustment module and the second conversion module. This path can make the optical signal realize the adjustment on the negative value, so it can meet the requirements of flexible configuration coefficients in practical applications. demand.

In a possible implementation, the control module is further configured to modify the size of the first control signal based on the output of the optical equalizer, the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal, and the first control signal The size of affects the degree of adjustment. In the aforementioned implementation, the control module can also calculate new optical equalizer coefficients according to the output of the optical equalizer. If the new optical equalizer coefficients have a change in magnitude compared with the previous optical equalizer coefficients, the control module The module can modify the size of the first control signal accordingly to obtain a new first control signal, and send it to the first adjustment module and the second adjustment module, so as to change the intensity of the optical signal by the first adjustment module and the second adjustment module. Degree of adjustment.

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, an optical switch, configured to: send an optical signal to the first adjustment module based on the third electrical signal; or, based on the fourth An electrical signal is used to send an optical signal to the second adjustment module. In the foregoing implementation manner, after receiving the second control signal, the optical switch can determine to conduct the connection with the first adjustment module or the second adjustment module based on the polarity (or magnitude) of the second control signal, if the second The control signal is the third electrical signal (for example, the third electrical signal is a positive electrical signal, etc.), the optical switch conducts the connection between it and the first adjustment module, and sends an optical signal to the first adjustment module, if The second control signal is the fourth electrical signal (for example, the fourth electrical signal is a negative electrical signal, etc.), and the optical switch conducts the connection between it and the second adjustment module, and sends an optical signal to the second adjustment module .

In a possible implementation manner, the second control signal is the third electrical signal or the fourth electrical signal, and the control module is further configured to: based on the output of the optical equalizer, convert the signal sent to the optical switch from the third electrical signal to changing to the fourth electrical signal, so that the optical switch sends an optical signal to the second adjustment module based on the fourth electrical signal; or, based on the output of the optical equalizer, changing the signal sent to the optical switch from the fourth electrical signal to the first Three electrical signals, so that the optical switch sends an optical signal to the first adjustment module based on the third electrical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal. In the aforementioned implementation, the control module can also calculate new optical equalizer coefficients according to the output of the optical equalizer. If the new optical equalizer coefficients have a change in polarity compared with the previous optical equalizer coefficients, If the signal currently output to the optical switch is the third electrical signal, the control module replaces the signal output to the optical switch with the fourth electrical signal, and if the signal currently output to the optical switch is the fourth electrical signal, the control module replaces Then the signal output to the optical switch is replaced with the third electrical signal, so as to reverse the polarity of the electrical signal obtained based on the optical signal.

In a possible implementation manner, the polarity of the third electrical signal is opposite to that of the fourth electrical signal; or, the third electrical signal is a non-zero electrical signal, and the fourth electrical signal is zero.

The third aspect of the embodiment of the present application provides an optical equalizer, which includes: a control module, configured to send a first control signal to an adjustment module, and send a second control signal to an electric switch; The intensity of the optical signal is adjusted based on the first control signal to obtain the adjusted optical signal; the conversion module is used to convert the adjusted optical signal into an electrical signal; the electric switch is used to convert the optical signal from the The electrical signal of the conversion module is converted into a first electrical signal or a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.

It can be seen from the above optical equalizer that when the optical equalizer is in the working state, the control module can send the first control signal to the adjustment module, and send the second control signal to the electric switch. After the adjustment module receives the optical signal from the outside and the first control signal from the control module, it can adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal. After the conversion module receives the adjusted optical signal from the adjustment module and the second control signal from the control module, it can convert the adjusted optical signal into an electrical signal and send it to the electrical switch. Under the action of the second control signal, the electric switch can convert the adjusted optical signal into a first electric signal or a second electric signal, and the polarity of the second electric signal is opposite to that of the first electric signal. It can be seen that due to the existence of the electric switch, even if the connection relationship between the adjustment module and the conversion module is fixed, the electric switch can not only adjust the optical signal output by the two to a positive value, but also make the optical signal to a negative value. Therefore, it can meet the needs of flexible configuration coefficients in practical applications.

In a possible implementation, the control module is further configured to modify the size of the first control signal based on the output of the optical equalizer, the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal, and the first control signal The size of affects the degree of adjustment.

In a possible implementation manner, the second control signal is the third electrical signal or the fourth electrical signal, and the electrical switch is configured to: convert the electrical signal from the conversion module into the first electrical signal based on the third electrical signal; Or, based on the fourth electrical signal, convert the electrical signal from the converting module into the second electrical signal.

In a possible implementation manner, the second control signal is the third electrical signal or the fourth electrical signal, and the control module is further configured to: based on the output of the optical equalizer, convert the signal sent to the electrical switch from the third electrical signal to replaced by the fourth electrical signal, so that the electrical switch converts the electrical signal from the conversion module into the second electrical signal based on the fourth electrical signal; or, based on the output of the optical equalizer, the signal sent to the electrical switch is converted from the fourth electrical signal The electrical signal is replaced with the third electrical signal, so that the electrical switch converts the electrical signal from the conversion module into the first electrical signal based on the third electrical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal.

The fourth aspect of the embodiments of this application provides a receiving end in an optical network, the receiving end includes the first aspect, any possible implementation of the first aspect, the second aspect, or any of the second aspects The optical equalizer described in one possible implementation manner.

The fifth aspect of the embodiments of the present application provides an optical signal processing method, which is implemented by an optical equalizer, and the optical equalizer includes: a control module, an adjustment module, an optical switch, a first conversion module, and a second conversion module, the The method includes: sending a first control signal to the adjustment module through the control module, and sending a second control signal to the optical switch; adjusting the intensity of the optical signal based on the first control signal through the adjustment module to obtain an adjusted optical signal; The switch sends the adjusted optical signal to the first conversion module based on the second control signal, so that the first conversion module converts the adjusted optical signal into the first electrical signal, or, through the optical switch based on the second control signal, sends the adjusted optical signal to the first electrical signal. The second conversion module sends the adjusted optical signal, so that the second conversion module converts the adjusted optical signal into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.

It can be seen from the above optical equalizer that when the optical equalizer is in the working state, the control module can send the first control signal to the adjustment module, and send the second control signal to the optical switch. After the adjustment module receives the optical signal from the outside and the first control signal from the control module, it can adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal. After receiving the adjusted optical signal from the adjustment module and the second control signal from the control module, the optical switch can send the adjusted optical signal to the first conversion module or the second conversion module based on the second control signal. If the first conversion module receives the adjusted optical signal, it converts the adjusted optical signal into the first electrical signal; if the second conversion module receives the adjusted optical signal, it converts the adjusted optical signal into the first electrical signal. Two electrical signals, the polarity of the second electrical signal is opposite to that of the first electrical signal. It can be seen that due to the existence of the optical switch, the connection relationship between the adjustment module and the conversion module is not fixed, and the optical switch can make the adjustment module and the first conversion module indirectly connected, so that the two can realize the adjustment of the optical signal on the positive value, The optical switch can also indirectly connect the adjustment module and the second conversion module, so that the two can adjust the optical signal to a negative value, so it can meet the demand for flexible configuration coefficients in practical applications.

In a possible implementation, the method further includes: using the control module to modify the size of the first control signal based on the output of the optical equalizer, the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal, the first The magnitude of the control signal affects the degree of adjustment.

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, and sending the adjusted optical signal to the first conversion module or the second conversion module through the optical switch based on the second control signal includes : sending the adjusted optical signal to the first conversion module through the optical switch based on the third electrical signal; or, sending the adjusted optical signal to the second conversion module through the optical switch based on the fourth electrical signal.

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, and the method further includes: through the control module based on the output of the optical equalizer, transferring the signal sent to the optical switch from the third electrical signal to The signal is replaced with the fourth electrical signal, so that the optical switch sends the adjusted optical signal to the second conversion module based on the fourth electrical signal; or, through the control module based on the output of the optical equalizer, the signal sent to the optical switch is changed from The fourth electrical signal is replaced with the third electrical signal, so that the optical switch sends an adjusted optical signal to the first conversion module based on the third electrical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal.

The sixth aspect of the embodiments of the present application provides an optical signal processing method, which is implemented by an optical equalizer, and the optical equalizer includes: a control module, an optical switch, a first adjustment module, a second adjustment module, and a first conversion module and a second conversion module, the method includes: sending the first control signal to the first adjustment module and the second adjustment module through the control module, and sending the second control signal to the optical switch; An adjustment module sends an optical signal, so that the first adjustment module adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the first conversion module, so that the first conversion module converts the adjusted optical signal The signal is converted into the first electrical signal, or, based on the second control signal, the optical switch sends the optical signal to the second adjustment module, so that the second adjustment module adjusts the intensity of the optical signal based on the first control signal, and sends the optical signal to the second adjustment module. The second conversion module sends the adjusted optical signal, so that the second conversion module converts the adjusted optical signal into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.

It can be seen from the above method that when the optical equalizer is in the working state, the control module can send the first control signal to the first adjustment module and the second adjustment module, and send the second control signal to the optical switch. After receiving the optical signal from the outside and the second control signal from the control module, the optical switch can send an optical signal to the first adjustment module or the second adjustment module based on the second control signal. If the first adjustment module receives the optical signal from the optical switch, it adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the first conversion module, so that the first conversion module converts the adjusted The optical signal is converted into a first electrical signal. If the second adjustment module receives the optical signal from the optical switch, it adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the second conversion module, so that the second conversion module converts the adjusted The optical signal is converted into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal. It can be seen that due to the existence of the optical switch, there are multiple paths for transmitting optical signals. The optical switch can make the optical signal go through the path formed by the first adjustment module and the first conversion module. The optical switch can also make the optical signal go through the path formed by the second adjustment module and the second conversion module. This path can make the optical signal realize the adjustment on the negative value, so it can meet the requirements of flexible configuration coefficients in practical applications. demand.

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, and sending an optical signal to the first adjustment module or the second adjustment module through the optical switch based on the second control signal includes: Sending an optical signal to the first adjustment module through the optical switch based on the third electrical signal; or sending an optical signal to the second adjustment module through the optical switch based on the fourth electrical signal.

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, and the method further includes: through the control module based on the output of the optical equalizer, transferring the signal sent to the optical switch from the third electrical signal to The signal is replaced with a fourth electrical signal, so that the optical switch sends an optical signal to the second adjustment module based on the fourth electrical signal; or, the control module sends the signal to the optical switch from the fourth electrical The signal is replaced with the third electrical signal, so that the optical switch sends an optical signal to the first adjustment module based on the third electrical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal.

The seventh aspect of the embodiments of the present application provides an optical signal processing method, which is implemented by an optical equalizer, and the optical equalizer includes: a control module, an adjustment module, a conversion module, and an electric switch, and the method includes: through the control module Send the first control signal to the adjustment module, and send the second control signal to the electric switch; adjust the intensity of the optical signal based on the first control signal through the adjustment module to obtain an adjusted optical signal; convert the adjusted optical signal through the conversion module The signal is converted into an electrical signal; the electrical signal from the conversion module is converted into a first electrical signal or a second electrical signal based on a second control signal through an electrical switch, and the polarity of the second electrical signal is opposite to that of the first electrical signal.

It can be seen from the above method that: when the optical equalizer is in the working state, the control module can send the first control signal to the adjustment module, and send the second control signal to the electric switch. After the adjustment module receives the optical signal from the outside and the first control signal from the control module, it can adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal. After the conversion module receives the adjusted optical signal from the adjustment module and the second control signal from the control module, it can convert the adjusted optical signal into an electrical signal and send it to the electrical switch. Under the action of the second control signal, the electric switch can convert the adjusted optical signal into a first electric signal or a second electric signal, and the polarity of the second electric signal is opposite to that of the first electric signal. It can be seen that due to the existence of the electric switch, even if the connection relationship between the adjustment module and the conversion module is fixed, the electric switch can not only adjust the optical signal output by the two to a positive value, but also make the optical signal to a negative value. Therefore, it can meet the needs of flexible configuration coefficients in practical applications.

In a possible implementation manner, the second control signal is the third electrical signal or the fourth electrical signal, and the electrical signal from the conversion module is converted into the first electrical signal or the second electrical signal based on the second control signal through the electrical switch. The signal includes: converting the electrical signal from the conversion module into a first electrical signal through the electrical switch based on the third electrical signal; or converting the electrical signal from the conversion module into a second electrical signal based on the fourth electrical signal through the electrical switch .

In a possible implementation manner, the second control signal is a third electrical signal or a fourth electrical signal, and the method further includes: through the control module based on the output of the optical equalizer, transferring the signal sent to the electrical switch from the third electrical signal to The signal is replaced with the fourth electrical signal, so that the electrical switch converts the electrical signal from the conversion module into the second electrical signal based on the fourth electrical signal; or, based on the output of the optical equalizer, converts the signal sent to the electrical switch from the first The four electrical signals are replaced with the third electrical signal, so that the electrical switch converts the electrical signal from the conversion module into the first electrical signal based on the third electrical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal .

The optical equalizer provided in the embodiment of the present application includes a control module, an adjustment module, an optical switch, a first conversion module, and a second conversion module. When the optical equalizer is in the working state, the control module can send the first control signal to the adjustment module, and send the second control signal to the optical switch. After the adjustment module receives the optical signal from the outside and the first control signal from the control module, it can adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal. After receiving the adjusted optical signal from the adjustment module and the second control signal from the control module, the optical switch can send the adjusted optical signal to the first conversion module or the second conversion module based on the second control signal. If the first conversion module receives the adjusted optical signal, it converts the adjusted optical signal into the first electrical signal; if the second conversion module receives the adjusted optical signal, it converts the adjusted optical signal into the first electrical signal. Two electrical signals, the polarity of the second electrical signal is opposite to that of the first electrical signal. It can be seen that due to the existence of the optical switch, the connection relationship between the adjustment module and the conversion module is not fixed, and the optical switch can make the adjustment module and the first conversion module indirectly connected, so that the two can realize the adjustment of the optical signal on the positive value, The optical switch can also indirectly connect the adjustment module and the second conversion module, so that the two can adjust the optical signal to a negative value, so it can meet the demand for flexible configuration coefficients in practical applications.

Description of drawings

FIG. 1 is a schematic diagram of an optical equalizer of the related art;

FIG. 2 is a schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 3 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 4 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a tap unit provided in an embodiment of the present application;

FIG. 6 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 7 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 8 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 9 is another schematic structural diagram of a tap unit provided in an embodiment of the present application;

FIG. 10 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 11 is another schematic structural diagram of an optical equalizer provided in an embodiment of the present application;

FIG. 12 is a schematic flowchart of an optical signal processing method provided in an embodiment of the present application;

FIG. 13 is another schematic flowchart of the optical signal processing method provided by the embodiment of the present application;

FIG. 14 is another schematic flowchart of the optical signal processing method provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application.

The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the terms used in this way can be interchanged under appropriate circumstances, and this is merely a description of the manner in which objects with the same attribute are described in the embodiments of the present application. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product, or apparatus comprising a series of elements is not necessarily limited to those elements, but may include elements not expressly included. Other elements listed explicitly or inherent to the process, method, product, or apparatus.

In an optical network, the transmission of optical signals is realized through optical fiber links between the sending end and the receiving end. Due to effects such as dispersion of the optical fiber, interference signals may be included in the optical signal, affecting the quality of the optical signal received at the receiving end. In order to ensure the quality of the optical signal, an optical equalizer can be set in the receiving end to eliminate interference signals and obtain optical signals with better quality. Then, the optical signal is converted into an electrical signal, and the electrical signal is sent to other devices in the receiving end for subsequent processing, so as to complete the communication between the sending end and the receiving end.

The working principle of the optical equalizer is as follows: by setting a set of coefficients and multiplying the intensity of the received optical signal by the set of coefficients, an adjusted optical signal is obtained. Since this group of coefficients can include positive values, negative values and zero, and only positive values and zero (intensity of light) in the optical field, there is no negative value, in order to make the optical signal can be realized on the positive and negative values (polarity) In related technologies, an optical equalizer usually includes an adjustment module and a conversion module, wherein the adjustment module can multiply the intensity of the optical signal by the absolute value of a certain coefficient to obtain an adjusted optical signal, and the conversion module can adjust the The final optical signal is converted into an electrical signal of a certain polarity, which corresponds to the positive or negative of the coefficient (for example, when the coefficient is positive, the polarity of the electrical signal is positive, and when the coefficient is negative value, the polarity of the electrical signal is negative). In this way, the optical equalizer realizes the conversion of the optical signal between positive and negative values.

For example, as shown in Figure 1 (Fig. 1 is a schematic diagram of an optical equalizer of the related art), assume that there are optical signals X1 and X2 mixed with interference signals, and the corresponding coefficients are 0.2 and -0.5, and the optical equalizer may include : adjustment module 1, adjustment module 2, conversion module 1 and conversion module 2. After the optical equalizer receives the optical signal X1 and the optical signal X2, it can send the optical signal X1 to the adjustment module 1, and the adjustment module 1 can multiply the intensity of the optical signal X1 by 0.2 to obtain the adjusted optical signal 0.2×X1. Next, the adjustment module 1 can send the adjusted optical signal 0.2×X1 to the conversion module 1, and the conversion module 1 can convert the adjusted optical signal 0.2×X1 into a positive current I1. Similarly, the optical equalizer can also send the optical signal X2 to the adjustment module 2, and the adjustment module 2 can multiply the intensity of the optical signal X2 by 0.5 to obtain an adjusted optical signal 0.5×X2. Then, the adjustment module 2 can send the adjusted optical signal 0.5×X2 to the conversion module 2, and the conversion module 2 can convert the adjusted optical signal 0.5×X2 into a negative negative current I2 (at this time, the current I2 can represent Optical signal - 0.5×X2). Finally, the current I1 and the current I2 are combined to obtain the output I1-I2 of the optical equalizer, which can be used by other devices in the receiving end for subsequent processing.

In the optical equalizer of the related art, since the connection relationship between the adjustment module and the conversion module is fixed, the combination of the two can only realize the adjustment on one coefficient, that is, the optical signal can only be adjusted to a positive value (still As in the above example, the adjustment module 1 and the conversion module 1 can only adjust the optical signal X1 to a positive current I1), or can only adjust the optical signal to a negative value (still as the above example, the adjustment module 2 and the conversion module 2 can only The optical signal X2 can be adjusted to a negative current I2), which cannot meet the demand for flexible configuration coefficients in practical applications.

In order to solve the above problems, the embodiment of the present application provides a new optical equalizer. There are three basic structures of the optical equalizer. The first basic structure of the optical equalizer will be introduced below, as shown in FIG. 2 ( Fig. 2 is a schematic structural diagram of the optical equalizer provided by the embodiment of the present application), the optical equalizer includes: a control module, an adjustment module (also referred to as a multiplication module), an optical switch, a first conversion module and a second conversion module module. Wherein, the first input end of the adjustment module is used as the input end of the entire optical equalizer, the first input end of the adjustment module is used to receive optical signals, the first output end of the control module is connected to the second input end of the adjustment module, and the control module The second output end of the optical switch is connected to the input end of the optical switch, the first output end of the optical switch is connected to the input end of the first conversion module, the second output end of the optical switch is connected to the input end of the second conversion module, and the first conversion module and the second conversion module can share one output end, the output end shared by the two is connected to the input end of the control module, and the output end shared by the two can be used as the output end of the entire optical equalizer. The following will introduce each module separately:

The control module may be presented as a chip or the like. The control module can realize various functions. For example, the control module can calculate the optical equalizer coefficient and divide the coefficient into two parts of amplitude (absolute value) and polarity (sign). Then, the control module can generate corresponding control signals, and send them to the adjustment module and the optical switch respectively, so as to control the adjustment module to realize the adjustment of the coefficient amplitude of the optical signal, and control the optical switch to select a path, and then combine the first conversion module or the second The conversion module realizes the adjustment of the coefficient polarity of the optical signal. In this way, the control module can make the optical signal adjust on the coefficient.

Adjustment modules, which can be presented as optical modulators, phase-change materials, and microcirculators, etc. Under the action of the control signal of the control module, the adjustment module can adjust the coefficient amplitude of the received optical signal, so that the intensity of the optical signal can be amplified or reduced by a certain multiple. It should be noted that the adjustment module can determine the magnitude of the coefficient amplitude based on the magnitude of the control signal it receives. For example, if the received control signal is a voltage signal of 2V, the adjustment module can determine that the coefficient magnitude is 0.2, and Multiply the intensity of the optical signal by 0.2. For another example, if a current signal whose control signal is 1.5A is received, the adjustment module may determine that the magnitude of the coefficient is 1.5, and multiply the intensity of the light signal by 1.5, and so on.

The optical switch can choose one of the following two situations under the action of the control signal of the control module: (1) turn on the connection between it and the first conversion module, and disconnect it from the second conversion module to send the adjusted optical signal to the first conversion module; (2) turn on the connection between it and the second conversion module, and disconnect it from the first conversion module to convert The adjusted optical signal is sent to the second converting module. It should be noted that the optical switch can choose to implement one of the above two situations based on the polarity (or magnitude, etc.) of the control signal it receives. For example, if the optical switch receives a positive electrical signal ( positive current signal or positive voltage signal), then turn on the connection between it and the first conversion module, and disconnect the connection between the remaining second conversion modules, if the optical switch receives a negative electrical signal (negative current signal or Negative voltage signal), then the connection between it and the second conversion module is turned on, and the connection between the other first conversion modules is disconnected. As another example, if the optical switch receives a non-zero electrical signal (non-zero current signal or voltage signal), it will turn on the connection between it and the first conversion module, and disconnect the connection between the remaining second conversion modules. , if the optical switch receives a zero electrical signal (that is, the control module does not send any electrical signal to the optical switch), it will be connected to the second conversion module, and the rest of the first conversion modules will be disconnected. Connection.

Both the first conversion module and the second conversion module may be presented as photodiodes (photo-diodes, PDs). The first conversion module and the second conversion module can make the adjusted optical signal from the optical switch realize the adjustment on the coefficient polarity, for example, the first conversion module can convert the adjusted optical signal into a positive electrical signal (positive current signal or positive voltage signal), and the second conversion module can convert the adjusted optical signal into a negative electrical signal (negative current signal or negative voltage signal).

It is worth noting that the control module can calculate a new optical equalizer coefficient based on the output of the entire optical equalizer, and based on the new optical equalizer coefficient, re-control the processing of the optical signal by the adjustment module and the optical switch to form an automatic feedback mechanism. It can be seen that the optical equalizer can realize multiple rounds of optical signal processing, and each round of optical signal processing corresponds to an optical equalizer coefficient. For any round of optical signal processing, the round of optical signal processing corresponds to The optical equalizer coefficients of are generated based on the output of the last round of the optical equalizer. Since the steps implemented by each component in the optical equalizer are similar in each round of optical signal processing, the following is an introduction to one of the optical signal processing rounds (hereinafter referred to as the current round) (for the sake of For the convenience of description, the control signal sent from the control module to the adjustment module is called the first control signal, the control signal sent from the control module to the optical switch is called the second control signal, and the electrical signal obtained by the first conversion module is called the first control signal. An electrical signal, the electrical signal obtained by the second conversion module is called the second electrical signal, the second control signal can be switched between the paired two electrical signals, and these two electrical signals are called the third electrical signal and the second electrical signal Four electrical signals):

The control module calculates the optical equalizer coefficient of the current round based on the output of the previous round, and the coefficient can be either a positive value or a negative value. After obtaining the optical equalizer coefficients of the current round, the control module can divide the optical equalizer coefficients of the current round into two parts, the first part is the amplitude of the optical equalizer coefficients of the current round, and the second part is the The polarity of the optical equalizer coefficient, then, the control module can generate the first control signal corresponding to the amplitude of the optical equalizer coefficient of the current round, and generate the second control signal corresponding to the polarity of the optical equalizer coefficient of the current round signal, and send the first control signal to the adjustment module, and send the second control signal to the optical switch. Wherein, the first control signal and the second control signal may be voltage signals or current signals. For example, as shown in 3 (Fig. 3 is another structural schematic diagram of the optical equalizer provided by the embodiment of the present application), after the control module calculates the coefficients a, b and c of the current round (assuming that a, b and c are respectively 0.2, 1 and -0.5), can generate the control signal 1 corresponding to 丨a丨, indicating the control signal 2 corresponding to 丨b丨, the control signal 3 corresponding to 丨c丨, and the control signal corresponding to sign(a) 4. Control signal 5 corresponding to sign(b) and control signal 6 corresponding to sign(c). Then, the control module can send the control signal 1, the control signal 2, the control signal 3, the control signal 4, the control signal 5 and the control signal 6 to the optical modulator 1, the optical modulator 2, the optical modulator 3, and the optical switch respectively. 1. Optical switch 2 and optical switch 3.

After the adjustment module receives the first control signal, it can determine the amplitude of the optical equalizer coefficient of the current round based on the magnitude of the first control signal, so as to obtain the amplitude of the optical equalizer coefficient of the current round. Then, the adjustment module can multiply the intensity of the received optical signal by the magnitude of the coefficient of the optical equalizer to obtain the adjusted optical signal. Still as in the above example, after receiving the control signal 1, the optical modulator 1 can determine 丨a丨 based on the control signal 1, and multiply the intensity of the optical signal X1 by 丨a丨 to obtain the adjusted optical signal 丨a丨×X1 , which is 0.2×X1, and sent to optical switch 1. Similarly, the optical modulator 2 can also obtain the adjusted optical signal 丨b丨×X2, that is, 1×X2, and send it to the optical switch 2, and the optical modulator 3 can also obtain the adjusted optical signal 丨c丨×X3 , that is, 0.5×X3, and sent to optical switch 3. It should be noted that the input terminals of the three optical modulators can be used as the input terminals of the optical equalizer, and optical delay lines are arranged on the input terminals of the optical modulator 1 and the optical modulator 2 . Then, after the outside world successively inputs optical signal X1, optical signal X2 and optical signal X3, due to the existence of optical delay line, optical modulator 1, optical modulator 2 and optical modulator 3 can receive optical signal X1, optical signal X1 and optical signal X3 at the same time. X2 and light signal X3.

After receiving the second control signal, the optical switch can determine to conduct the connection with the first conversion module or the second conversion module based on the polarity (or magnitude) of the second control signal, if the second control signal is the third electrical signal (for example, the third electrical signal is a positive electrical signal, etc.), the optical switch conducts the connection between it and the first conversion module, and sends the adjusted optical signal to the first conversion module, if the second The control signal is the fourth electrical signal (for example, the fourth electrical signal is a negative electrical signal, etc.), and the optical switch conducts the connection between it and the second conversion module, and sends the adjusted optical signal to the second conversion module. Signal. Still as in the above example, after receiving the control signal 4, the optical switch 1 can determine sign(a) based on the control signal 4. Since the sign(a) is a positive sign, the optical switch 1 can conduct between it and PD1 (passing through The connection of the multiplexer 1), and send the adjusted optical signal 1a1×X1 to the multiplexer 1. Similarly, the optical switch 2 can also conduct the connection between it and the PD1, and send the adjusted optical signal 1b1×X2 to the multiplexer 1 . The optical switch 3 can also conduct the connection between it and the PD2 (through the multiplexer 2 in the middle), and send the adjusted optical signal 1c1×X3 to the multiplexer 2 .

If the first conversion module receives the adjusted optical signal, it can perform photoelectric conversion on the adjusted optical signal to obtain the first electrical signal; if the second conversion module receives the adjusted optical signal, it can convert the adjusted optical signal The signal is photoelectrically converted to obtain a second electrical signal, the second electrical signal is opposite in polarity to the first electrical signal, for example, the first electrical signal is a positive voltage signal, and the second electrical signal is a negative voltage signal, and for example, the first electrical signal The electrical signal is a positive current signal, the second electrical signal is a negative current signal, and so on. After the first conversion module obtains the first electrical signal or the second conversion module obtains the second electrical signal, since the first conversion module and the second conversion module can share one output terminal, the first electrical signal or the second electrical signal passes through the output At the end, the output of the current second round of the entire optical equalizer will be generated and sent to the outside world and the control module. Still as in the above example, after receiving the adjusted optical signal 丨a丨×X1 and the adjusted optical signal 丨b丨×X2, the multiplexer 1 can synthesize the two into an optical signal 丨a丨×X1+丨b丨×X2 and send to PD1. PD1 can convert the synthesized optical signal 丨a丨×X1+丨b丨×X2 into a positive current I1. Similarly, PD2 can convert the synthesized optical signal IcI×X3 into negative current I2. The positive current I1 and the negative current I2 are collected at the output terminal shared by PD1 and PD2, and the current round output of the entire optical equalizer is obtained as I=I1-I2, and sent to the control module and external devices.

After the control module receives the output of the current second round of the optical equalizer, it can use some algorithms to calculate the output of the current second round, so as to evaluate the characteristics of the channel (that is, the channel between the optical switch and the conversion module), and the following can be obtained Optical equalizer coefficients for a round. It should be noted that if the characteristics of the channel do not change much, the coefficients of the optical equalizer in the next round may be consistent with the coefficients of the optical equalizer in the current round; The equalizer coefficients may have changed compared to the optical equalizer coefficients of the current round. Compared with the optical equalizer coefficient of the current round, there may be three situations in which the optical equalizer coefficient of the next round changes: (1) If the optical equalizer coefficient of the next round only changes in magnitude, the control The module can only modify the size of the first control signal to obtain a new first control signal and send it to the adjustment module; (2) if the light equalization coefficient of the next round only changes in polarity, the When the optical switch outputs the third electrical signal, the control module outputs the fourth electrical signal to the optical switch in the next round; Output the third electrical signal to the optical switch in the next round; (3) If the optical equalization coefficient of the next round has both a change in amplitude and a change in polarity, the control module can execute the aforementioned ( The operations in 1) and (2) will not be repeated here. In this way, the adjustment module, the optical switch, the first conversion module and the second conversion module in the optical equalizer can continue to perform the next round of optical signal processing under the control of the control module, which is the same as the current round of optical signal processing. The optical signal processing is similar and will not be repeated here.

Still as in the above example, after the control module evaluates the characteristics of the channel based on I, if it is found that the characteristics of the channel have not changed much, then it is determined that the optical equalizer coefficients of the next round are still a, b and c, and the coefficients of the optical equalizer in the next round are still changed to Control signal 1, control signal 2, control signal 3, control signal 4, control signal 5 and control signal 6 are respectively sent to optical modulator 1, optical modulator 2, optical modulator 3, optical switch 1, optical switch 2 and Optical switch 3. If it is found that the characteristics of the channel change greatly, then determine the optical equalizer coefficients of the next round as d, e and f (set d, e and f to be -0.3, -0.8 and 0.2 respectively), and in the next round Control signal 7, control signal 8, control signal 9, control signal 10, control signal 11 and control signal 12 are respectively sent to optical modulator 1, optical modulator 2, optical modulator 3, optical switch 1, optical switch 2 and Optical switch 3, so that these components perform the next round of optical signal processing.

It is worth noting that if the current round is the first round, the optical equalizer coefficients of the first round can be preset coefficients, and the preset coefficients can be set according to actual needs, and there is no limitation here.

Furthermore, in the example shown in Figure 3, inside the optical equalizer, except for the control module, most components are connected through optical waveguides, in order to reduce the number of crossing optical waveguides, the The optical equalizer is deformed to obtain the optical equalizer as shown in Figure 4 (Figure 4 is another structural schematic diagram of the optical equalizer provided by the embodiment of the application), the optical equalizer includes: a control module, a tap unit 1, a tap Unit 2, tap unit 3, multiplexer 1, multiplexer 2, PD1 and PD2. The internal structure of the tap unit 1 is as shown in Figure 5 (Fig. 5 is a schematic structural diagram of the tap unit provided by the embodiment of the present application), and the tap unit 3 includes: a beam splitter 3, an optical modulator 3, an optical switch 3 and a delay waveguide 3. Wherein, the beam splitter 3 is used for splitting the optical signal into two paths for transmission after receiving the optical signal input from the outside. Wherein, the first path is: sending the optical signal to the optical modulator 3, and the optical modulator 3 sends the adjusted optical signal to the optical switch 3 after the optical modulator 3 adjusts the optical signal, and the optical switch 3 selectively transmits the adjusted optical signal The optical signal is sent to PD1 or PD2; the second path is: the optical signal is sent to the delay waveguide 3, and the delay waveguide 3 delays the optical signal to a certain extent before sending it to the beam splitter 2 of the tap unit 2. It should be noted that both the adjustment operation of the optical modulator 3 and the selection operation of the optical switch 3 are completed by the control signal of the control module, and reference may be made to the relevant description in FIG. 3 , which will not be repeated here. Similarly, the structures and functions of the tap unit 1 and the tap unit 2 are also similar to those of the tap unit 3 , which will not be repeated here.

The above is a detailed description of the first basic structure of the optical equalizer, and the second basic structure of the optical equalizer will be introduced below, as shown in Figure 6 (Figure 6 is the optical equalizer provided by the embodiment of the present application Another structural diagram of an optical equalizer), the optical equalizer includes: a control module, an optical switch, a first adjustment module, a second adjustment module, a first conversion module, and a second conversion module. Wherein, the first input end of the optical switch is used as the input end of the entire optical equalizer, the input end of the optical switch is used to receive optical signals, and the first output end of the control module is connected with the input end of the first adjustment module and the second adjustment module respectively. The input end of the control module is connected to the second input end of the optical switch, the output end of the first adjustment module is connected to the input end of the first conversion module, and the output end of the second adjustment module is connected to the second conversion module The input terminal of the first conversion module and the second conversion module can share an output terminal, and the output terminal shared by the two is connected to the input terminal of the control module, and the output terminal shared by the two can be used as the output terminal of the entire optical equalizer . The following will introduce each module separately:

The control module may be presented as a chip or the like. The control module can realize various functions. For example, the control module can calculate the optical equalizer coefficient and divide the coefficient into two parts of amplitude (absolute value) and polarity (sign). Then, the control module can generate corresponding control signals, which are respectively sent to the first adjustment module, the second adjustment module and the optical switch, so as to control the optical switch to select a path, so as to combine the first adjustment module and the first conversion module to realize the optical signal in the coefficient The adjustment on the amplitude and the polarity of the coefficient, or the adjustment of the amplitude of the coefficient and the polarity of the coefficient on the optical signal can be realized by combining the second adjustment module and the second conversion module. In this way, the control module can make the optical signal adjust on the coefficient.

The optical switch can choose one of the following two situations under the action of the control signal of the control module: (1) turn on the connection between it and the first adjustment module, and disconnect it from the second adjustment module to send the optical signal to the first adjustment module; (2) turn on the connection between it and the second adjustment module, and disconnect it from the first adjustment module to send the optical signal to the second adjustment module. It should be noted that the optical switch can choose to implement one of the above two situations based on the polarity (or magnitude, etc.) of the control signal it receives. For example, if the optical switch receives a positive electrical signal ( positive current signal or positive voltage signal), then conduct the connection between it and the first adjustment module, and disconnect the connection between the remaining second adjustment modules, if the optical switch receives a negative electrical signal (negative current signal or Negative voltage signal), the connection between it and the second adjustment module is turned on, and the connection between the other first adjustment modules is disconnected. As another example, if the optical switch receives a non-zero electrical signal (non-zero current signal or voltage signal), it will turn on the connection between it and the first adjustment module, and disconnect the other second adjustment modules. , if the optical switch receives a zero electrical signal (that is, the control module does not send any electrical signal to the optical switch), it will be connected to the second adjustment module, and the rest of the first adjustment modules will be disconnected. Connection.

The first adjustment module and the second adjustment module may be presented in the form of a light modulator or the like. The first adjustment module and the second adjustment module can adjust the coefficient amplitude of the received optical signal under the action of the control signal of the control module, so that the intensity of the optical signal can be amplified or reduced by a certain factor. It should be noted that the first adjustment module and the second adjustment module can determine the magnitude of the coefficient amplitude based on the magnitude of the control signal they receive. For example, if the received control signal is a voltage signal of 2V, the first adjustment The module and the second adjustment module can determine the magnitude of the coefficient to be 0.2 and multiply the intensity of the optical signal by 0.2. For another example, if a current signal whose control signal is 1.5A is received, the first adjustment module and the second adjustment module may determine that the magnitude of the coefficient is 1.5, and multiply the intensity of the optical signal by 1.5, and so on.

Both the first conversion module and the second conversion module may be presented in the form of PD. The first conversion module and the second conversion module can make the adjusted optical signal from the optical switch realize the adjustment on the coefficient polarity, for example, the first conversion module can convert the adjusted optical signal into a positive electrical signal (positive current signal or positive voltage signal), and the second conversion module can convert the adjusted optical signal into a negative electrical signal (negative current signal or negative voltage signal).

It is worth noting that the control module can calculate a new optical equalizer coefficient based on the output of the entire optical equalizer, and based on the new optical equalizer coefficient, re-control the processing of the optical signal by the adjustment module and the optical switch to form an automatic feedback mechanism. It can be seen that the optical equalizer can realize multiple rounds of optical signal processing, and each round of optical signal processing corresponds to an optical equalizer coefficient. For any round of optical signal processing, the round of optical signal processing corresponds to The optical equalizer coefficients of are generated based on the output of the last round of the optical equalizer. Since the steps implemented by each component in the optical equalizer are similar in each round of optical signal processing, the following is an introduction to one of the optical signal processing rounds (hereinafter referred to as the current round) (for the sake of For ease of description, the control signal sent by the control module to the first adjustment module and the second adjustment module is called the first control signal, the control signal sent by the control module to the optical switch is called the second control signal, and the first conversion module The obtained electric signal is called the first electric signal, and the electric signal obtained by the second conversion module is called the second electric signal, and the second control signal can be switched between the paired two electric signals, and these two electric signals are called for the third electrical signal and the fourth electrical signal):

The control module calculates the optical equalizer coefficient of the current round based on the output of the previous round, and the coefficient can be either a positive value or a negative value. After obtaining the optical equalizer coefficients of the current round, the control module can divide the optical equalizer coefficients of the current round into two parts, the first part is the amplitude of the optical equalizer coefficients of the current round, and the second part is the The polarity of the optical equalizer coefficient, then, the control module can generate the first control signal corresponding to the amplitude of the optical equalizer coefficient of the current round, and generate the second control signal corresponding to the polarity of the optical equalizer coefficient of the current round signal, and send the first control signal to the first adjustment module and the second adjustment module, and send the second control signal to the optical switch. Wherein, the first control signal and the second control signal may be voltage signals or current signals. For example, as shown in 7 (FIG. 7 is another structural schematic diagram of the optical equalizer provided by the embodiment of the present application), after the control module calculates the coefficients a, b and c of the current round (assuming that a, b and c are respectively 0.2, 1 and -0.5), can generate the control signal 1 corresponding to 丨a丨, indicating the control signal 2 corresponding to 丨b丨, the control signal 3 corresponding to 丨c丨, and the control signal corresponding to sign(a) 4. Control signal 5 corresponding to sign(b) and control signal 6 corresponding to sign(c). Then, the control module can send the control signal 1 to the light modulator 1 and the light modulator 4, send the control signal 2 to the light modulator 2 and the light modulator 5, and send the control signal 3 to the light modulator 3 and the light modulator 6, The control signal 4 , the control signal 5 and the control signal 6 are sent to the optical switch 1 , the optical switch 2 and the optical switch 3 respectively.

After the optical switch receives the second control signal, it can determine to conduct the connection with the first adjustment module or the second adjustment module based on the polarity (or magnitude) of the second control signal, if the second control signal is the third electrical signal (for example, the third electrical signal is a positive electrical signal, etc.), the optical switch conducts the connection between it and the first adjustment module, and sends an optical signal to the first adjustment module, if the second control signal is For the fourth electrical signal (for example, the fourth electrical signal is a negative electrical signal, etc.), the optical switch conducts the connection between it and the second adjustment module, and sends an optical signal to the second adjustment module. Still as in the above example, after the optical switch 1 receives the control signal 4, it can determine the sign(a) based on the control signal 4. Since the sign(a) is a positive sign, the optical switch 1 can conduct the connection between it and the optical modulator 1. connection, and send the optical signal X1 to the optical modulator 1. Similarly, the optical switch 2 can also conduct the connection between it and the optical modulator 2 and send the optical signal X2 to the optical modulator 2 . The optical switch 3 can also conduct the connection between it and the optical modulator 6 , and send the optical signal X3 to the optical modulator 6 . It should be noted that the input terminals of the three optical switches can be used as the input terminals of the optical equalizer, and optical delay lines are arranged on the input terminals of the optical switch 1 and the optical switch 2 . Then, after the outside world successively inputs optical signal X1, optical signal X2, and optical signal X3, due to the existence of optical delay lines, optical switch 1, optical switch 2, and optical switch 3 can receive optical signal X1, optical signal X2, and optical signal at the same time. X3.

After the first adjustment module and the second adjustment module receive the first control signal, they can determine the magnitude of the optical equalizer coefficient of the current round based on the magnitude of the first control signal, thereby obtaining the magnitude of the optical equalizer coefficient of the current round magnitude. If the first adjustment module receives the optical signal from the optical switch, it can multiply the intensity of the received optical signal by the amplitude of the coefficient of the optical equalizer to obtain the adjusted optical signal. If the second adjustment module receives the optical signal from the optical switch, it can also multiply the intensity of the received optical signal by the amplitude of the coefficient of the optical equalizer to obtain the adjusted optical signal. Still as in the above example, after the optical modulator 1 and the optical modulator 4 receive the control signal 1, they can determine Ia| based on the control signal 1. Since only the optical modulator 1 has received the optical signal X1, the optical modulator 1 can multiply the intensity of the optical signal X1 by 丨a丨 to obtain the adjusted optical signal 丨a丨×X1, which is 0.2×X1, and adjust The final optical signal 丨a丨×X1 is sent to the multiplexer 1. Similarly, the optical modulator 2 can also obtain the adjusted optical signal 1b1×X2, that is, 01×X2, and send the adjusted optical signal 1b1×X2 to the multiplexer 1. The optical modulator 6 can also obtain the adjusted optical signal 1c1×X3, that is, 0.5×X3, and send the adjusted optical signal 1c1×X3 to the multiplexer 2.

After the control module receives the output of the current second round of the optical equalizer, it can use some algorithms to calculate the output of the current second round, so as to evaluate the characteristics of the channel (that is, the channel between the optical switch and the conversion module), and the following can be obtained Optical equalizer coefficients for a round. It should be noted that if the characteristics of the channel do not change much, the coefficients of the optical equalizer in the next round may be consistent with the coefficients of the optical equalizer in the current round; The equalizer coefficients may have changed compared to the optical equalizer coefficients of the current round. Compared with the optical equalizer coefficient of the current round, there may be three situations in which the optical equalizer coefficient of the next round changes: (1) If the optical equalizer coefficient of the next round only changes in magnitude, the control The module can only modify the size of the first control signal to obtain a new first control signal and send it to the first adjustment module and the second adjustment module; (2) if the optical equalization coefficient of the next round only changes in polarity Change, in the case that the third electrical signal is output to the optical switch in the current round, the control module outputs the fourth electrical signal to the optical switch in the next round, and the fourth electrical signal is output to the optical switch in the current round In the case of , the control module outputs the third electrical signal to the optical switch in the next round; (3) If the optical equalization coefficient of the next round changes both in amplitude and in polarity, the control module The module can perform the operations in (1) and (2) mentioned above together, which will not be repeated here. In this way, the adjustment module, the optical switch, the first conversion module and the second conversion module in the optical equalizer can continue to perform the next round of optical signal processing under the control of the control module, which is the same as the current round of optical signal processing. The optical signal processing is similar and will not be repeated here.

Still as in the above example, after the control module evaluates the characteristics of the channel based on I, if it is found that the characteristics of the channel have not changed much, then it is determined that the optical equalizer coefficients of the next round are still a, b and c, and the coefficients of the optical equalizer in the next round are still changed to Control signal 1 is sent to optical modulator 1 and optical modulator 4, control signal 2 is sent to optical modulator 2 and optical modulator 5, control signal 3 is sent to optical modulator 3 and optical modulator 6, control signal 4, control The signal 5 and the control signal 6 are respectively sent to the optical switch 1 , the optical switch 2 and the optical switch 3 . If it is found that the characteristics of the channel change greatly, then determine the optical equalizer coefficients of the next round as d, e and f (set d, e and f to be -0.3, -0.8 and 0.2 respectively), and in the next round Control signal 7 is sent to optical modulator 1 and optical modulator 4, control signal 8 is sent to optical modulator 2 and optical modulator 5, control signal 9 is sent to optical modulator 3 and optical modulator 6, control signal 10, control The signal 11 and the control signal 12 are sent to the optical switch 1 , the optical switch 2 and the optical switch 3 respectively, so that these components perform the next round of optical signal processing.

Furthermore, in the example shown in Figure 7, inside the optical equalizer, except for the control module, most components are connected through optical waveguides, in order to reduce the number of crossing optical waveguides, the The optical equalizer is deformed to obtain the optical equalizer as shown in Figure 8 (Figure 8 is another structural schematic diagram of the optical equalizer provided by the embodiment of the present application), the optical equalizer includes: a control module, a tap unit 1, a tap Unit 2, tap unit 3, multiplexer 1, multiplexer 2, PD1 and PD2. The internal structure of the tap unit 3 is shown in Figure 9 (Fig. 9 is another structural schematic diagram of the tap unit provided by the embodiment of the present application), the tap unit 3 includes: an optical switch 3, a beam splitter 3, a beam splitter 6, an optical Modulator 3, optical modulator 6, beam combiner 3 and delay waveguide 3, wherein, after receiving the optical signal input from the outside, the optical switch 3 can selectively send the optical signal to the optical signal to the beam splitter 3 or beam splitter 6. If the beam splitter 3 receives the optical signal, it divides the optical signal into two paths for transmission, wherein, the first path is to send the optical signal to the optical modulator 3, and the optical modulator 3 adjusts the optical signal, and then adjusts the optical signal. The final optical signal is sent to PD1. The second path is: sending the optical signal to the delay waveguide 3 (through the beam combiner 3 in the middle), and the delay waveguide 3 delays the optical signal to a certain extent before sending it to the optical switch 2 of the tap unit 2 . If the beam splitter 6 receives the optical signal, it divides the optical signal into two paths for transmission, wherein, the first path is to send the optical signal to the optical modulator 6, and the optical modulator 6 adjusts the optical signal and then adjusts the optical signal. The final optical signal is sent to PD2. The second path is: sending the optical signal to the delay waveguide 3 (through the beam combiner 3 in the middle), and the delay waveguide 3 delays the optical signal to a certain extent before sending it to the optical switch 2 of the tap unit 2 . It should be noted that the adjustment operation of the optical modulator 3 and the optical modulator 6 and the selection operation of the optical switch 3 are all completed by the control signal of the control module, which can be referred to the relevant description part in FIG. 3 , and will not be repeated here. Similarly, the structures and functions of the tap unit 1 and the tap unit 2 are also similar to those of the tap unit 3 , which will not be repeated here.

The optical equalizer provided in the embodiment of the present application includes a control module, an optical switch, a first adjustment module, a second adjustment module, a first conversion module, and a second conversion module. When the optical equalizer is in the working state, the control module can send a first control signal to the first adjustment module and the second adjustment module, and send a second control signal to the optical switch. After receiving the optical signal from the outside and the second control signal from the control module, the optical switch can send an optical signal to the first adjustment module or the second adjustment module based on the second control signal. If the first adjustment module receives the optical signal from the optical switch, it adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the first conversion module, so that the first conversion module converts the adjusted The optical signal is converted into a first electrical signal. If the second adjustment module receives the optical signal from the optical switch, it adjusts the intensity of the optical signal based on the first control signal, and sends the adjusted optical signal to the second conversion module, so that the second conversion module converts the adjusted The optical signal is converted into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal. It can be seen that due to the existence of the optical switch, there are multiple paths for transmitting optical signals. The optical switch can make the optical signal go through the path formed by the first adjustment module and the first conversion module. The optical switch can also make the optical signal go through the path formed by the second adjustment module and the second conversion module. This path can make the optical signal realize the adjustment on the negative value, so it can meet the requirements of flexible configuration coefficients in practical applications. demand.

The above is a detailed description of the second basic structure of the optical equalizer, and the third basic structure of the optical equalizer will be introduced below, as shown in Figure 10 (Figure 10 is the optical equalizer provided by the embodiment of the present application Another schematic diagram of the optical equalizer), the optical equalizer includes: a control module, an adjustment module (also called a multiplication module), a conversion module and an electric switch. Wherein, the first input end of the adjustment module is used as the input end of the entire optical equalizer, the first input end of the adjustment module is used to receive optical signals, the first output end of the control module is connected to the second input end of the adjustment module, and the control module The second output end of the electric switch is connected to the first input end of the electric switch, the output end of the adjustment module is connected to the input end of the conversion module, the output end of the conversion module is connected to the second input end of the electric switch, and the output end of the electric switch is connected to the control The input end of the module is connected, and the output end of the electric switch can be used as the output end of the whole optical equalizer. The following will introduce each module separately:

The control module may be presented as a chip or the like. The control module can realize various functions. For example, the control module can calculate the optical equalizer coefficient and divide the coefficient into two parts of amplitude (absolute value) and polarity (sign). Then, the control module can generate corresponding control signals and send them to the adjustment module and the electric switch respectively, so as to control the adjustment module to realize the adjustment of the coefficient amplitude of the optical signal, and control the electric switch to select a path, and then combine the first conversion module or the second The second conversion module realizes the adjustment of the coefficient polarity of the optical signal. In this way, the control module can make the optical signal adjust on the coefficient.

The conversion module may be presented in the form of a photo-diode (PD). The conversion module and the second conversion module can convert the adjusted optical signal from the adjustment module into an electrical signal, for example, a voltage signal or a current signal.

The electric switch can choose one of the following two situations under the action of the control signal of the control module: (1) convert the electric signal from the conversion module into a positive electric signal (positive current signal or positive voltage signal ), and output the positive electrical signal; (2) convert the electrical signal from the conversion module into a negative electrical signal (negative current signal or negative voltage signal), and output the negative electrical signal.

It is worth noting that the control module can calculate new optical equalizer coefficients based on the output of the entire optical equalizer, and based on the new optical equalizer coefficients, re-control the processing of the optical signal by the adjustment module and the electrical switch to form a Automatic feedback mechanism. It can be seen that the optical equalizer can realize multiple rounds of optical signal processing, and each round of optical signal processing corresponds to an optical equalizer coefficient. For any round of optical signal processing, the round of optical signal processing corresponds to The optical equalizer coefficients of are generated based on the output of the last round of the optical equalizer. Since the steps implemented by each component in the optical equalizer are similar in each round of optical signal processing, the following is an introduction to one of the optical signal processing rounds (hereinafter referred to as the current round) (for the sake of For the convenience of description, the control signal sent from the control module to the adjustment module is called the first control signal, and the control signal sent from the control module to the electric switch is called the second control signal. The two electrical signals are called the third electrical signal and the fourth electrical signal, and the electrical signal obtained by the electrical switch processing the electrical signal from the adjustment module in the third electrical signal is called the first electrical signal, The electrical signal obtained by processing the electrical signal from the adjustment module with the electrical switch in the fourth electrical signal is called the second electrical signal):

The control module calculates the optical equalizer coefficient of the current round based on the output of the previous round, and the coefficient can be either a positive value or a negative value. After obtaining the optical equalizer coefficients of the current round, the control module can divide the optical equalizer coefficients of the current round into two parts, the first part is the amplitude of the optical equalizer coefficients of the current round, and the second part is the The polarity of the optical equalizer coefficient, then, the control module can generate the first control signal corresponding to the amplitude of the optical equalizer coefficient of the current round, and generate the second control signal corresponding to the polarity of the optical equalizer coefficient of the current round signal, and send the first control signal to the adjustment module, and send the second control signal to the electric switch. Wherein, the first control signal and the second control signal may be voltage signals or current signals. For example, as shown in 11 (FIG. 11 is another structural schematic diagram of the optical equalizer provided by the embodiment of the present application), after the control module calculates the coefficients a, b and c of the current round (assuming that a, b and c are respectively 0.2, 1 and -0.5), can generate the control signal 1 corresponding to 丨a丨, indicating the control signal 2 corresponding to 丨b丨, the control signal 3 corresponding to 丨c丨, and the control signal corresponding to sign(a) 4. Control signal 5 corresponding to sign(b) and control signal 6 corresponding to sign(c). Then, the control module can send the control signal 1, the control signal 2, the control signal 3, the control signal 4, the control signal 5 and the control signal 6 to the optical modulator 1, the optical modulator 2, the optical modulator 3, the electrical switch 1. Electric switch 2 and electric switch 3.

After the adjustment module receives the first control signal, it can determine the magnitude of the current round of optical equalizer coefficients based on the magnitude of the first control signal, thereby obtaining the magnitude of the current round of optical equalizer coefficients. Then, the adjustment module can multiply the intensity of the received optical signal by the magnitude of the coefficient of the optical equalizer to obtain the adjusted optical signal. Still as in the above example, after receiving the control signal 1, the optical modulator 1 can determine 丨a丨 based on the control signal 1, and multiply the intensity of the optical signal X1 by 丨a丨 to obtain the adjusted optical signal 丨a丨×X1 , which is 0.2×X1, and sent to PD1. Similarly, the optical modulator 2 can also obtain the adjusted optical signal 丨b丨×X2, that is, 1×X2, and send it to PD2, and the optical modulator 3 can also obtain the adjusted optical signal 丨c丨×X3, namely 0.5×X3, and sent to PD3. It should be noted that the input terminals of the three optical modulators can be used as the input terminals of the optical equalizer, and optical delay lines are arranged on the input terminals of the optical modulator 1 and the optical modulator 2 . Then, after the outside world successively inputs optical signal X1, optical signal X2 and optical signal X3, due to the existence of optical delay line, optical modulator 1, optical modulator 2 and optical modulator 3 can receive optical signal X1, optical signal X1 and optical signal X3 at the same time. X2 and light signal X3.

After the conversion module receives the adjusted optical signal from the adjustment module, it can perform photoelectric conversion on the adjusted optical signal to convert the adjusted optical signal into an electrical signal. Still as in the above example, PD1 receives the adjusted optical signal丨a丨×X1 is converted into current I1 and sent to electric switch 1. Similarly, PD2 can convert the adjusted optical signal 丨b丨×X2 into current I2 and send it to the electrical switch 2, and PD3 can convert the adjusted optical signal 丨c丨×X3 into current I3 and send it to the electrical switch 2. switch 3.

After the electric switch receives the second control signal, it can determine to turn on its processing of the electric signal from the conversion module based on the polarity (or magnitude) of the second control signal, if the second control signal is a third electric signal (for example, The third electrical signal is a positive electrical signal, etc.), the electrical switch converts the electrical signal from the conversion module into a first electrical signal, and outputs the first electrical signal, if the second control signal is a fourth electrical signal (for example, The fourth electrical signal is a negative electrical signal, etc.), the electrical switch converts the electrical signal from the conversion module into a second electrical signal, and outputs the second electrical signal, the polarity of the second electrical signal is opposite to that of the first electrical signal, For example, the first electrical signal is a positive voltage signal, and the second electrical signal is a negative voltage signal. For example, the first electrical signal is a positive current signal, and the second electrical signal is a negative current signal, and so on. Still as in the above example, after the electric switch 1 receives the control signal 4, it can determine the sign(a) based on the control signal 4. Since the sign(a) is a positive sign, the electric switch 1 can convert the current I1 into a positive current I4. Similarly, the electric switch 2 can also convert the current I2 into a positive current I5, and the electric switch 3 can also convert the current I3 into a negative current I6.

Since the output terminal of the electrical switch can be used as the output terminal of the entire optical equalizer, when the first electrical signal or the second electrical signal passes through the output terminal, it will generate the output of the current second round of the entire optical equalizer and send it to the outside world and control module. Still as in the above example, the positive current I4, the positive current 5 and the negative current I6 are collected at the output terminals shared by the electric switch 1, the electric switch 2 and the electric switch 3, and the output of the current round of the entire optical equalizer is I=I4+ I5-I6, and sent to the control module and external devices.

After the control module receives the output of the current second round of the optical equalizer, it can use some algorithms to calculate the output of the current second round, so as to evaluate the characteristics of the channel (that is, the channel between the electric switch and the conversion module), and the following can be obtained Optical equalizer coefficients for a round. It should be noted that if the characteristics of the channel do not change much, the coefficients of the optical equalizer in the next round may be consistent with the coefficients of the optical equalizer in the current round; The equalizer coefficients may have changed compared to the optical equalizer coefficients of the current round. Compared with the optical equalizer coefficient of the current round, there may be three situations in which the optical equalizer coefficient of the next round changes: (1) If the optical equalizer coefficient of the next round only changes in magnitude, the control The module can only modify the size of the first control signal to obtain a new first control signal and send it to the adjustment module; (2) if the light equalization coefficient of the next round only changes in polarity, the When the electric switch outputs the third electric signal, the control module outputs the fourth electric signal to the electric switch in the next round; Output the third electrical signal to the electric switch in the next round; (3) If the optical equalization coefficient of the next round has both a change in amplitude and a change in polarity, the control module can also execute the aforementioned ( The operations in 1) and (2) will not be repeated here. In this way, the adjustment module, electrical switch, and conversion module in the optical equalizer can continue the next round of optical signal processing under the control of the control module. This process is similar to the current round of optical signal processing. Here No longer.

Still as in the above example, after the control module evaluates the characteristics of the channel based on I, if it is found that the characteristics of the channel have not changed much, then it is determined that the optical equalizer coefficients of the next round are still a, b and c, and the coefficients of the optical equalizer in the next round are still changed to Control signal 1, control signal 2, control signal 3, control signal 4, control signal 5 and control signal 6 are respectively sent to optical modulator 1, optical modulator 2, optical modulator 3, electric switch 1, electric switch 2 and Electric switch 3. If it is found that the characteristics of the channel change greatly, then determine the optical equalizer coefficients of the next round as d, e and f (set d, e and f to be -0.3, -0.8 and 0.2 respectively), and in the next round The control signal 7, the control signal 8, the control signal 9, the control signal 10, the control signal 11 and the control signal 12 are respectively sent to the optical modulator 1, the optical modulator 2, the optical modulator 3, the electric switch 1, the electric switch 2 and the Electric switch 3, so that these components perform the next round of optical signal processing.

In the embodiment of the present application, when the optical equalizer is in the working state, the control module can send the first control signal to the adjustment module, and send the second control signal to the electric switch. After the adjustment module receives the optical signal from the outside and the first control signal from the control module, it can adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal. After the conversion module receives the adjusted optical signal from the adjustment module and the second control signal from the control module, it can convert the adjusted optical signal into an electrical signal and send it to the electrical switch. Under the action of the second control signal, the electric switch can convert the adjusted optical signal into a first electric signal or a second electric signal, and the polarity of the second electric signal is opposite to that of the first electric signal. It can be seen that due to the existence of the electric switch, even if the connection relationship between the adjustment module and the conversion module is fixed, the electric switch can not only adjust the optical signal output by the two to a positive value, but also make the optical signal to a negative value. Therefore, it can meet the needs of flexible configuration coefficients in practical applications.

The above is the detailed description of the optical equalizer provided in the embodiment of the present application, and the optical signal processing method provided in the embodiment of the present application will be introduced below. Fig. 12 is a schematic flow chart of the optical signal processing method provided by the embodiment of the present application. As shown in Fig. 12, the method is realized by the optical equalizer shown in Fig. 2, and the optical equalizer includes: a control module, an adjustment module, An optical switch, a first conversion module and a second conversion module, the method includes:

1201. Send the first control signal to the adjustment module through the control module, and send the second control signal to the optical switch;

1202. Use the adjustment module to adjust the intensity of the optical signal based on the first control signal, to obtain an adjusted optical signal;

1203. Send the adjusted optical signal to the first conversion module through the optical switch based on the second control signal, so that the first conversion module converts the adjusted optical signal into the first electrical signal, or, through the optical switch based on the second The control signal sends the adjusted optical signal to the second conversion module, so that the second conversion module converts the adjusted optical signal into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.

For descriptions of steps 1201 to 1203, reference may be made to relevant descriptions of the embodiment shown in FIG. 2 , and details are not repeated here.

Fig. 13 is another schematic flowchart of the optical signal processing method provided by the embodiment of the present application. As shown in Fig. 13, the method is realized by the optical equalizer shown in Fig. 6, and the optical equalizer includes: a control module, an optical switch , a first adjustment module, a second adjustment module, a first conversion module and a second conversion module, the method comprising:

1301. Send the first control signal to the first adjustment module and the second adjustment module through the control module, and send the second control signal to the optical switch;

1302. Use the optical switch to send an optical signal to the first adjustment module based on the second control signal, so that the first adjustment module adjusts the intensity of the optical signal based on the first control signal, and send the adjusted optical signal to the first conversion module signal, so that the first conversion module converts the adjusted optical signal into a first electrical signal, or, through the optical switch based on the second control signal, sends an optical signal to the second adjustment module, so that the second adjustment module based on the first The control signal adjusts the intensity of the optical signal, and sends the adjusted optical signal to the second conversion module, so that the second conversion module converts the adjusted optical signal into a second electrical signal, and the second electrical signal and the first electrical signal The signal polarity is reversed.

For descriptions of steps 1301 to 1302, reference may be made to relevant descriptions of the embodiment shown in FIG. 6 , and details are not repeated here.

Fig. 14 is another schematic flowchart of the optical signal processing method provided by the embodiment of the present application. As shown in Fig. 14, the method is realized by the optical equalizer shown in Fig. 10, and the optical equalizer includes: a control module, an electric switch , adjustment module, conversion module, the method includes:

1401. Send the first control signal to the adjustment module through the control module, and send the second control signal to the electric switch;

1402. Use the adjustment module to adjust the intensity of the optical signal based on the first control signal, to obtain an adjusted optical signal;

1403. Convert the adjusted optical signal into an electrical signal through a conversion module;

1404. Convert the electrical signal from the converting module into a first electrical signal or a second electrical signal based on the second control signal through the electrical switch, where the polarity of the second electrical signal is opposite to that of the first electrical signal.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the application, and should cover Within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

An optical equalizer, characterized in that the optical equalizer comprises:

A control module, configured to send a first control signal to the adjustment module, and send a second control signal to the optical switch;

The adjustment module is configured to adjust the intensity of the optical signal based on the first control signal to obtain an adjusted optical signal;

The optical switch is configured to send the adjusted optical signal to the first conversion module or the second conversion module based on the second control signal;

The first conversion module is configured to convert the adjusted optical signal into a first electrical signal;

The second converting module is configured to convert the adjusted optical signal into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.
The optical equalizer according to claim 1, wherein the control module is further configured to modify the size of the first control signal based on the output of the optical equalizer, and the output of the optical equalizer is based on the The first electrical signal and the second electrical signal are generated, and the magnitude of the first control signal affects the adjustment degree.
The optical equalizer according to claim 1 or 2, wherein the second control signal is a third electrical signal or a fourth electrical signal, and the optical switch is used for:

sending the adjusted optical signal to a first conversion module based on the third electrical signal;

or,

Sending the adjusted optical signal to a second conversion module based on the fourth electrical signal.
The optical equalizer according to any one of claims 1 to 3, wherein the second control signal is a third electrical signal or a fourth electrical signal, and the control module is further used for:

Based on the output of the optical equalizer, the signal sent to the optical switch is changed from the third electrical signal to the fourth electrical signal, so that the optical switch sends the signal to the optical switch based on the fourth electrical signal. The second conversion module sends the adjusted optical signal;

or,

Based on the output of the optical equalizer, the signal sent to the optical switch is changed from the fourth electrical signal to the third electrical signal, so that the optical switch sends the signal to the optical switch based on the third electrical signal. The first conversion module sends the adjusted optical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal.
The optical equalizer according to claim 3 or 4, wherein the polarity of the third electrical signal is opposite to that of the fourth electrical signal, or the third electrical signal is a non-zero electrical signal, so The fourth electrical signal is zero.
The optical equalizer according to any one of claims 1 to 5, wherein the adjustment module is an optical modulator.
The optical equalizer according to any one of claims 1 to 6, wherein the first conversion module and the second conversion module are photodiodes.
An optical equalizer, characterized in that the optical equalizer comprises:

A control module, configured to send a first control signal to the first adjustment module and the second adjustment module, and send a second control signal to the optical switch;

The optical switch is configured to send an optical signal to the first adjustment module or the second adjustment module based on the second control signal;

The first adjustment module is configured to adjust the intensity of the optical signal based on the first control signal, and send the adjusted optical signal to the first conversion module;

The second adjustment module is configured to adjust the intensity of the optical signal based on the first control signal, and send the adjusted optical signal to a second conversion module;

The first conversion module is configured to convert the adjusted optical signal into a first electrical signal;

The second converting module is configured to convert the adjusted optical signal into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.
The optical equalizer according to claim 8, wherein the control module is further configured to modify the magnitude of the first control signal based on the output of the optical equalizer, and the output of the optical equalizer is based on the The first electrical signal and the second electrical signal are generated, and the magnitude of the first control signal affects the adjustment degree.
The optical equalizer according to claim 8 or 9, wherein the second control signal is a third electrical signal or a fourth electrical signal, and the optical switch is used for:

sending an optical signal to the first adjustment module based on the third electrical signal;

or,

Sending an optical signal to the second adjustment module based on the fourth electrical signal.
The optical equalizer according to any one of claims 8 to 10, wherein the second control signal is a third electrical signal or a fourth electrical signal, and the control module is further used for:

Based on the output of the optical equalizer, the signal sent to the optical switch is changed from the third electrical signal to the fourth electrical signal, so that the optical switch sends the signal to the optical switch based on the fourth electrical signal. The second adjustment module sends the optical signal;

or,

Based on the output of the optical equalizer, the signal sent to the optical switch is changed from the fourth electrical signal to the third electrical signal, so that the optical switch sends the signal to the optical switch based on the third electrical signal. The first adjustment module sends the optical signal, and the output of the optical equalizer is generated based on the first electrical signal and the second electrical signal.
The optical equalizer according to claim 10 or 11, wherein the polarity of the third electrical signal is opposite to that of the fourth electrical signal; or, the third electrical signal is a non-zero electrical signal, so The fourth electrical signal is zero.
The optical equalizer according to any one of claims 8 to 12, wherein the adjustment module is an optical modulator.
The optical equalizer according to any one of claims 8 to 13, wherein the first conversion module and the second conversion module are photodiodes.
A receiving end in an optical network, characterized in that the receiving end includes the optical equalizer according to any one of claims 1-14.
An optical signal processing method, characterized in that the method is implemented by an optical equalizer, and the optical equalizer includes: a control module, an adjustment module, an optical switch, a first conversion module, and a second conversion module, and the method includes :

sending a first control signal to the adjustment module through the control module, and sending a second control signal to the optical switch;

Adjusting the intensity of the optical signal based on the first control signal by the adjustment module to obtain an adjusted optical signal;

sending the adjusted optical signal to a first conversion module based on the second control signal by the optical switch, so that the first conversion module converts the adjusted optical signal into a first electrical signal, Or, the optical switch sends the adjusted optical signal to the second conversion module based on the second control signal, so that the second conversion module converts the adjusted optical signal into a second electrical signal signal, the polarity of the second electrical signal is opposite to that of the first electrical signal.
An optical signal processing method, characterized in that the method is implemented by an optical equalizer, and the optical equalizer includes: a control module, an optical switch, a first adjustment module, a second adjustment module, a first conversion module, and a second A conversion module, the method comprising:

sending the first control signal to the first adjustment module and the second adjustment module through the control module, and sending the second control signal to the optical switch;

The optical switch sends an optical signal to the first adjustment module based on the second control signal, so that the first adjustment module adjusts the intensity of the optical signal based on the first control signal, and sends the optical signal to the first adjustment module. The first conversion module sends the adjusted optical signal, so that the first conversion module converts the adjusted optical signal into a first electrical signal, or, through the optical switch based on the second control signal, sending an optical signal to a second adjustment module, so that the second adjustment module adjusts the intensity of the optical signal based on the first control signal, and sending the adjusted optical signal to the second conversion module , so that the second conversion module converts the adjusted optical signal into a second electrical signal, and the polarity of the second electrical signal is opposite to that of the first electrical signal.