CN107769857B - Optical signal modulation processing method, device and system - Google Patents
Optical signal modulation processing method, device and system Download PDFInfo
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- CN107769857B CN107769857B CN201610700350.8A CN201610700350A CN107769857B CN 107769857 B CN107769857 B CN 107769857B CN 201610700350 A CN201610700350 A CN 201610700350A CN 107769857 B CN107769857 B CN 107769857B
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Abstract
The invention provides a method, a device and a system for modulating and processing an optical signal, and relates to the field of optical transmission. The method comprises the following steps: sending a detection signal with a preset phase waveform to a modulator, wherein the modulator modulates an electric signal sent by a digital signal processor to a preset wavelength optical wave according to the preset phase waveform of the detection signal to obtain a target optical signal; acquiring a target electrical signal obtained by converting the target optical signal; determining a modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the target electric signal; and sending the modulation phase sequence to the digital signal processor so that the digital signal processor sends an electric signal corresponding to the modulation phase sequence to the modulator. The scheme of the invention solves the problem that the optical modules can not be communicated because the phase sequence of the optical signal obtained by the modulation of the modulator after the wavelength is switched and the electrical signal sent by the DSP is different.
Description
Technical Field
The present invention relates to the field of optical transmission, and in particular, to a method, an apparatus, and a system for modulating and processing an optical signal.
Background
In the field of optical transmission, an electrical signal needs to be added to light for transmission after the light is modulated by a modulator during optical transmission, and the transmitted optical signal needs to be correctly analyzed on the receiving side of an optical module.
However, during the modulation process, the phase of the modulated optical signal changes after each operation of switching the wavelength. The transmission channel is fixed when the digital signal processor DSP transmits a signal to be transmitted to the modulator, and the DSP detects the data received by the modulator according to the fixed phase information carried by the fixed phase. In this case, if the phase of the optical signal adjusted by the modulator changes, the DSP sends the data with the fixed phase to the modulator according to the fixed data channel, and the relationship between the phase of the optical signal and the phase of the optical signal after the current change is not the same, the information of the corresponding phase that the receiving side cannot receive at the corresponding optical phase occurs, so that the optical modules cannot communicate with each other.
Disclosure of Invention
The invention aims to provide an optical signal modulation processing method, an optical signal modulation processing device and an optical signal modulation processing system, which aim to solve the problem that optical modules cannot be communicated due to the fact that the phase sequence of an optical signal obtained by modulating a modulator after wavelength switching and an electrical signal sent by a DSP is different.
To achieve the above object, an embodiment of the present invention provides an optical signal modulation processing method, including:
sending a detection signal with a preset phase waveform to a modulator, wherein the modulator modulates an electric signal sent by a digital signal processor to a preset wavelength optical wave according to the preset phase waveform of the detection signal to obtain a target optical signal;
acquiring a target electrical signal obtained by converting the target optical signal;
determining a modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the target electric signal;
and sending the modulation phase sequence to the digital signal processor so that the digital signal processor sends an electric signal corresponding to the modulation phase sequence to the modulator.
Wherein, before the step of sending the detection signal with the preset phase waveform to the modulator, the method further comprises:
sending a voltage debugging signal to the modulator, wherein the modulator modulates an electric signal sent by a digital signal processor to a preset wavelength and then obtains a voltage debugging optical signal according to a preset phase waveform of the voltage debugging signal;
acquiring a voltage debugging electric signal obtained after the voltage debugging optical signal is converted;
and outputting a voltage adjusting signal to the modulator according to the voltage debugging electric signal, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
Wherein before the step of obtaining the target electrical signal converted from the target optical signal, the method further comprises:
and outputting a voltage adjusting signal to the modulator to enable the bias voltage of the modulator to be a third preset voltage value.
Wherein, the step of determining the modulation phase sequence of the optical wave corresponding to the preset wavelength by the modulator according to the target electrical signal comprises:
filtering the target electric signal to obtain a first signal in a first polarization state and a second signal in a second polarization state;
determining phase relation information of the first signal and the second signal when the bias voltage of the modulator is a third preset voltage value;
and determining the modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the phase relation information.
Wherein, before the step of sending the detection signal with the preset phase waveform to the modulator, the method further comprises:
acquiring the signal quality of a voltage debugging electric signal when the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value;
if the signal quality meets a preset condition, sending a detection signal with a preset phase waveform to a modulator; otherwise, the voltage adjusting signal is output to the modulator again.
Wherein, after the step of sequentially sending the modulation phases to the digital signal processor, further comprising:
and turning off the detection signal, and outputting a voltage adjustment signal to the modulator to enable the bias voltage of the modulator to reach a first preset voltage value and the phase voltage to reach a second preset voltage value.
Wherein, the detection signal is a square wave scrambling signal or a sine wave scrambling signal.
In order to achieve the above object, an embodiment of the present invention further provides an optical signal modulation processing apparatus, including:
the first sending module is used for sending a detection signal with a preset phase waveform to a modulator, wherein the modulator modulates an electric signal sent by the digital signal processor to a preset wavelength light wave according to the preset phase waveform of the detection signal to obtain a target optical signal;
the first acquisition module is used for acquiring a target electrical signal obtained by converting the target optical signal;
the determining module is used for determining the modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the target electric signal;
and the second sending module is used for sending the modulation phase sequence to the digital signal processor so as to enable the digital signal processor to send the electric signals corresponding to the modulation phase sequence to the modulator.
Wherein, the optical signal modulation processing apparatus further includes:
the third sending module is used for sending a voltage debugging signal to the modulator before sending a detection signal with a preset phase waveform to the modulator, wherein the modulator modulates an electric signal sent by the digital signal processor to a preset wavelength and then obtains a voltage debugging optical signal according to the preset phase waveform of the voltage debugging signal;
the second acquisition module is used for acquiring the voltage debugging electric signal after the voltage debugging optical signal is converted;
and the first processing module is used for outputting a voltage adjusting signal to the modulator according to the voltage debugging electric signal, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
Wherein, the optical signal modulation processing apparatus further includes:
and the second processing module is used for outputting a voltage adjusting signal to the modulator before acquiring the target electrical signal converted by the target optical signal, so that the bias voltage of the modulator is a third preset voltage value.
Wherein the determining module comprises:
the first processing submodule is used for filtering the target electric signal to obtain a first signal in a first polarization state and a second signal in a second polarization state;
the first determining submodule is used for determining phase relation information of the first signal and the second signal when the bias voltage of the modulator is a third preset voltage value;
and the second determining submodule is used for determining the modulation phase sequence of the light wave corresponding to the preset wavelength by the modulator according to the phase relation information.
Wherein, the optical signal modulation processing apparatus further includes:
the third acquisition module is used for acquiring the signal quality of the voltage debugging electric signal when the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value before sending the detection signal with the preset phase waveform to the modulator;
the third processing module is used for sending a detection signal with a preset phase waveform to the modulator if the signal quality meets a preset condition; otherwise, the voltage adjusting signal is output to the modulator again.
Wherein, the optical signal modulation processing apparatus further includes:
and the fourth processing module is used for turning off the detection signal and outputting a voltage adjusting signal to the modulator after the modulation phase is sequentially sent to the digital signal processor, so that the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value.
Wherein, the detection signal is a square wave scrambling signal or a sine wave scrambling signal.
In order to achieve the above object, an embodiment of the present invention further provides an optical signal modulation processing system, including the optical signal modulation processing apparatus as described above.
The technical scheme of the invention has the following beneficial effects:
according to the optical signal modulation processing method provided by the embodiment of the invention, a detection signal with a preset phase waveform is sent to the modulator, so that the modulator modulates the received electric signal sent by the DSP to a preset wavelength optical wave according to the detection signal to obtain a target optical signal. And then, acquiring a target electrical signal obtained by converting the target optical signal, so that the modulation phase sequence of the optical wave of the preset wavelength corresponding to the modulator can be determined by the target electrical signal. Finally, the determined adjustment phase sequence is communicated to the DSP. Therefore, the DSP can know the modulation phase sequence of the modulator corresponding to the light wave with the preset wavelength, and can finish the corresponding transmission of the electrical signal and the optical phase, and the DSP can correctly analyze the data after receiving the data and finish the intercommunication, thereby solving the problem that the receiving side cannot correctly analyze and does not intercommunicate because the phase sequence is changed after the modulation.
Drawings
FIG. 1 is a first flowchart illustrating steps of a method for modulating and processing an optical signal according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second step of a method for modulating and processing an optical signal according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a third step of the optical signal modulation processing method according to the embodiment of the present invention;
fig. 4 is a first schematic application diagram of an optical signal modulation processing method according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating an application of the optical signal modulation processing method according to the embodiment of the present invention;
fig. 6 is a schematic diagram of a specific flow chart of the optical signal modulation processing method applied to the FPGA according to the embodiment of the present invention;
fig. 7 is a schematic structural diagram of an optical signal modulation processing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an optical signal modulation processing method aiming at the problem that optical modules can not be communicated due to the difference between the phase sequence of optical signals obtained by modulation of a modulator after wavelength switching and electrical signals sent by a DSP (digital signal processor), and the communication among the optical modules is realized by determining the modulation phase sequence of optical waves corresponding to the modulator and informing the DSP.
As shown in fig. 1, an optical signal modulation processing method according to an embodiment of the present invention includes:
102, acquiring a target electrical signal obtained by converting the target optical signal;
103, determining a modulation phase sequence of the optical wave with the preset wavelength corresponding to the modulator according to the target electric signal;
and 104, sending the modulation phase sequence to the digital signal processor so that the digital signal processor sends an electric signal corresponding to the modulation phase sequence to the modulator.
Through steps 101 to 104, in the optical signal modulation processing method according to the embodiment of the present invention, a detection signal having a preset phase waveform is first sent to the modulator, so that the modulator modulates the received electrical signal sent by the DSP to a preset wavelength optical wave according to the detection signal to obtain a target optical signal. And then, acquiring a target electrical signal obtained by converting the target optical signal, so that the modulation phase sequence of the optical wave of the preset wavelength corresponding to the modulator can be determined by the target electrical signal. Finally, the determined adjustment phase sequence is communicated to the DSP. Therefore, the DSP can know the modulation phase sequence of the modulator corresponding to the light wave with the preset wavelength, and can finish the corresponding transmission of the electrical signal and the optical phase, and the DSP can correctly analyze the data after receiving the data and finish the intercommunication, thereby solving the problem that the receiving side cannot correctly analyze and does not intercommunicate because the phase sequence is changed after the modulation.
In addition, as shown in fig. 2, the optical signal modulation processing method according to the embodiment of the present invention, before step 101, further includes:
and 107, outputting a voltage adjusting signal to the modulator according to the voltage debugging electric signal, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
In this embodiment, in order to better determine the modulation phase sequence of the modulator corresponding to the preset wavelength light wave, before sending the detection signal for detection, a voltage tuning signal is sent to the modulator, so that the modulator operates in a relatively stable state. Therefore, in step 105, a voltage debug signal is sent to the modulator, so that the modulator can modulate the received electrical signal sent by the DSP onto a preset wavelength light wave according to the preset phase waveform of the voltage debug signal to obtain a voltage debug optical signal. Then, in step 106, a voltage debugging electrical signal obtained by converting the voltage debugging optical signal is obtained. Then, in step 107, a voltage adjusting signal is outputted to the modulator according to the voltage adjusting electrical signal, so that the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value.
It should be noted that, when the modulator operates in the steady state, the obtained voltage debugging electrical signal is close to 0, so in step 107, according to whether the voltage debugging electrical signal is close to 0, a corresponding voltage adjusting signal is output according to a preset rule (a corresponding relationship between a change of the bias voltage and the phase voltage of the modulator and a change of the voltage debugging electrical signal), and the operating voltage of the modulator is adjusted until the obtained voltage debugging electrical signal is close to 0. At this time, the modulator bias voltage is a first preset voltage value, and the phase voltage is a second preset voltage value. The first preset voltage value and the second preset voltage value are not limited to fixed values, and only represent values corresponding to the bias voltage and the phase voltage when the voltage debugging electric signal is close to 0, for example, in one-time voltage adjustment, when the voltage debugging electric signal is close to 0, the voltage value of the bias voltage is a, and the voltage value of the phase voltage is B; in another voltage adjustment, when the voltage debugging electrical signal is close to 0, the voltage value of the bias voltage is C, and the voltage value of the phase voltage is D, which are different from the previously obtained voltage values.
Thus, after voltage regulation, the modulator operates in a steady state. However, to detect the modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator, on the basis of the above embodiment, before step 101, the method further includes:
and step 108, outputting a voltage adjusting signal to the modulator to enable the bias voltage of the modulator to be a third preset voltage value.
In order to determine the modulation phase sequence, before sending the detection signal, the step 108 is required to bias the bias voltage of the modulator, where the bias voltage is a third preset voltage value, and the third preset voltage value is different from the first preset voltage value in the stable operating state. And in order to avoid the interference of the voltage debugging signal to the detection signal, the voltage debugging signal is turned off before the detection signal is sent.
Then, a detection signal with a preset phase waveform may be sent to the modulator, until the modulation phase sequence of the optical wave corresponding to the preset wavelength of the modulator is determined.
Specifically, as shown in fig. 3, step 103 includes:
The obtained target electric signal is firstly filtered to obtain a first signal in a first polarization state and a second signal in a second polarization state. When the first polarization state is an X polarization state, the second polarization state is a Y polarization state; when the first polarization state is the Y polarization state, the second polarization state is the X polarization state. As shown in step 108, the offset voltage of the modulator is adjusted to the third predetermined voltage value before the detection signal is transmitted, so that the phase relationship information between the first signal and the second signal when the offset voltage is the third predetermined voltage value can be determined. If the first signal is positive and the second signal is negative and the corresponding phase relationship information is 0, the phase relationship information includes four cases. And then, determining the modulation phase sequence of the light wave corresponding to the preset wavelength by the modulator according to the phase relation information.
Specifically, phase relationship information corresponding to different modulation phase sequences may be stored in advance, and after the phase relationship information is determined, the modulation phase sequence of the modulator corresponding to the preset wavelength light wave can be correspondingly determined. Or, according to the condition of the phase relation information, calculating the modulation phase sequence of the light wave corresponding to the preset wavelength of the modulator, trying to analyze the light signal received by the light module at the receiving side according to the calculation result, and determining the modulation phase sequence corresponding to the current phase relation information after correct analysis.
The modulation phase sequence of the modulator corresponding to the predetermined wavelength light wave is determined, and is reported to the DSP in step 104. At this time, the modulation phase sequence of the modulator corresponding to the preset wavelength light wave is already determined, and detection is not required, so on the basis of the foregoing embodiment, after step 104, the method further includes:
step 109, turning off the detection signal, and outputting a voltage adjustment signal to the modulator, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
And turning off the detection signal to avoid the influence of the detection signal on the adjustment process, outputting a voltage adjustment signal to the modulator, and adjusting the bias voltage and the phase voltage of the modulator to reach the voltage value of the modulator working in the stable state so as to ensure that the modulator works in the stable state. Of course, in order to keep the modulator operating in a stable state, the voltage debug signal is continuously transmitted after the detection signal is turned off, and once the modulator operating state is no longer stable, the operating voltage can be continuously adjusted to recover the stable operating state.
In addition, it should be noted that, when the modulator operates in the stable state, the working voltage is more valued, so that after the working voltage is adjusted according to the voltage debugging signal to make the modulator operate in the stable state, a situation that the optical signal generated after modulation is converted into an electrical signal under the working voltage, the signal quality of the electrical signal does not reach the standard occurs, and if the detection of the modulation phase sequence is continued, a result with a larger error is obtained. Therefore, on the basis of the above embodiment, before the step 101, the method further includes:
step 110, acquiring the signal quality of the voltage debugging electric signal when the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value;
step 111, if the signal quality meets a preset condition, sending a detection signal with a preset phase waveform to a modulator; otherwise, the voltage adjusting signal is output to the modulator again.
After the working voltage of the modulator is adjusted, acquiring the signal quality of the current voltage debugging electric signal, judging whether the signal quality meets a preset condition (whether the signal quality meets the standard), and if the signal quality meets the preset condition, sending a detection signal; if the preset condition is not met, the voltage adjusting signal is output to the modulator again, and the working voltage of the modulator is adjusted again. Of course, the adjustment of the operating voltage may be performed again by sending the voltage debug signal again after initializing the modulator, and performing the adjustment based on the voltage debug signal, which is not described herein again.
In an embodiment of the present invention, the detection signal is a square wave scrambling signal or a sine wave scrambling signal.
The square wave scrambling signal is more convenient to generate and obvious in contrast, so that the square wave scrambling signal can be used as a detection signal; the sine wave scrambled signal may be used as the detection signal in consideration of a smoother waveform and less generation of glitches. In an application, a more suitable signal type may be selected according to specific requirements.
In specific application, the optical signal modulation processing method of the embodiment of the invention is realized by a programmable logic device FPGA. As shown in fig. 4 and 5, the modulator modulates the electrical signal sent by the DSP onto a preset wavelength light wave according to a preset phase waveform of the voltage debugging signal or the detection signal sent by the FPGA, so as to complete sending of the optical signal; the laser provides local oscillation light for modulation for the modulator; the photodiode IPM converts the optical signal into an electrical signal; the hardware circuit filter circuit filters the electric signal; and voltage debugging signals or detection signals sent by the FPGA are sent to the modulator, electric signals obtained after conversion and filtering of optical signals modulated by the modulator are obtained in real time, and the modulation phase sequence of the modulator corresponding to the preset wavelength light waves is determined. The DSP can adjust the electrical signals of the channels 1-4 to be correspondingly sent with the optical phase according to the received modulation phase sequence, so that the problem that the data cannot be correctly analyzed on the receiving side due to the change of the optical phase of the signal modulated by the modulator after the laser switches different wavelengths is solved.
The modulator structure comprises a bias loop and a phase loop, wherein the bias loop needs a working voltage as a bias voltage, and the phase loop needs a working voltage as a phase voltage. The bias loop comprises 4 bias corresponding to two paths of X polarization states and two paths of Y polarization states, and the phase loop comprises 2 phase corresponding to X bias states and Y polarization states.
Therefore, the FPAG adopts the method of the embodiment of the present invention, and the basic flow is shown in fig. 6:
s601, initializing a modulator, and clearing a bias loop and a phase loop;
s602, sending a voltage debugging signal dds to enable a bias loop and lock the loop (the bias voltage reaches a first preset voltage value in a stable working state);
s603, judging whether the bias loop is locked, if so, executing the next step; if not, returning to the S602;
s604, enabling a phase loop and locking the loop (the phase voltage reaches a second preset voltage value in a stable working state);
s605, judging whether the phase loop is locked, if so, executing the next step; if not, returning to the S604;
s606, keeping the bias loop and the phase loop locked, and recording the current locking point (the bias voltage and the voltage value of the phase voltage under the stable working state);
s607, turning off dds signal, sending detection signal dither;
s608, biasing the bias loop locking point, detecting the detection result (phase relation information) of the feedback signal of the diter signal on the phase (X _ phase and Y _ phase);
s609, determining the modulation phase sequence of the modulator corresponding to the preset wavelength light wave according to the detection result, and informing the DSP;
s610, turning off a diter signal, correcting the bias loop (adjusting the bias voltage to be the recorded first preset voltage value), sending dds signals, and setting a phase loop locking point (adjusting the phase voltage to be the recorded first preset voltage value);
s611, the bias loop and the phase loop are re-enabled.
Taking the use of a square wave scrambling signal as an example of a check signal, after the optical module starts the wave cutting operation, the FPGA firstly sends dds signals to the modulator, and performs voltage locking according to the received corresponding electric signals converted by the IPM; and then sending the square wave scrambling signal to a modulator, determining a modulation phase sequence of the modulator corresponding to the preset wavelength optical wave according to the received corresponding electric signal converted by the IPM, and informing the DSP. After the modulation phase sequence of the modulator corresponding to the preset wavelength light wave is determined, the current modulation phase sequence and the DSP corresponding command can be checked and recorded through register information. When the wavelength is continuously switched, other modulation phase sequences and the DSP corresponding commands are found and then stored, so that the butt joint and the intercommunication can be realized more conveniently and quickly.
Of course, the above specific implementation flow of the optical signal modulation processing method according to the embodiment of the present invention may be modified adaptively according to different usage scenarios or for different modulators. The optical signal modulation processing method of the embodiment of the present invention is not limited to be implemented by an FPGA, and may also be implemented by other device structures such as a field programmable gate array, a programmable logic device, and the like, which are not listed here.
In summary, the optical signal modulation processing method according to the embodiment of the present invention is configured to notify the DSP of the modulation phase sequence of the optical wave with the preset wavelength corresponding to the modulator based on the detection signal with the preset phase waveform, so that the DSP can correspondingly adjust the internal data transmission sequence to complete the corresponding transmission of the electrical signal and the optical phase, thereby solving the problem that the data cannot be normally analyzed at the receiving side due to the change of the optical phase of the signal modulated by the modulator after the laser switches different wavelengths in the conventional adjustment.
As shown in fig. 7, an embodiment of the present invention further provides an optical signal modulation processing apparatus, including:
a first sending module 701, configured to send a detection signal with a preset phase waveform to a modulator, where the modulator modulates an electrical signal sent by a digital signal processor to a preset wavelength optical wave according to the preset phase waveform of the detection signal to obtain a target optical signal;
a first obtaining module 702, configured to obtain a target electrical signal obtained by converting the target optical signal;
a determining module 703, configured to determine, according to the target electrical signal, a modulation phase sequence of the optical wave with a preset wavelength corresponding to the modulator;
a second sending module 704, configured to send the modulation phase sequence to the digital signal processor, so that the digital signal processor sends an electrical signal corresponding to the modulation phase sequence to the modulator.
Wherein, the optical signal modulation processing apparatus further includes:
the third sending module is used for sending a voltage debugging signal to the modulator before sending a detection signal with a preset phase waveform to the modulator, wherein the modulator modulates an electric signal sent by the digital signal processor to a preset wavelength and then obtains a voltage debugging optical signal according to the preset phase waveform of the voltage debugging signal;
the second acquisition module is used for acquiring the voltage debugging electric signal after the voltage debugging optical signal is converted;
and the first processing module is used for outputting a voltage adjusting signal to the modulator according to the voltage debugging electric signal, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
Wherein, the optical signal modulation processing apparatus further includes:
and the second processing module is used for outputting a voltage adjusting signal to the modulator before acquiring the target electrical signal converted by the target optical signal, so that the bias voltage of the modulator is a third preset voltage value.
Wherein the determining module comprises:
the first processing submodule is used for filtering the target electric signal to obtain a first signal in a first polarization state and a second signal in a second polarization state;
the first determining submodule is used for determining phase relation information of the first signal and the second signal when the bias voltage of the modulator is a third preset voltage value;
and the second determining submodule is used for determining the modulation phase sequence of the light wave corresponding to the preset wavelength by the modulator according to the phase relation information.
Wherein, the optical signal modulation processing apparatus further includes:
the third acquisition module is used for acquiring the signal quality of the voltage debugging electric signal when the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value before sending the detection signal with the preset phase waveform to the modulator;
the third processing module is used for sending a detection signal with a preset phase waveform to the modulator if the signal quality meets a preset condition; otherwise, the voltage adjusting signal is output to the modulator again.
Wherein, the optical signal modulation processing apparatus further includes:
and the fourth processing module is used for turning off the detection signal and outputting a voltage adjusting signal to the modulator after the modulation phase is sequentially sent to the digital signal processor, so that the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value.
Wherein, the detection signal is a square wave scrambling signal or a sine wave scrambling signal.
The optical signal modulation processing device of the embodiment of the invention is used for correspondingly adjusting the internal data transmission sequence and finishing the corresponding transmission of the electric signal and the optical phase on the basis of the modulation phase sequence of the optical wave with the preset wavelength of the modulator by the detection signal with the preset phase waveform and informing the DSP of the modulation phase sequence, thereby solving the problem that the data cannot be normally analyzed at the receiving side caused by the change of the optical phase of the signal modulated by the modulator after the laser switches different wavelengths in the existing adjustment.
The apparatus is an apparatus to which the optical signal modulation processing method is applied, and the implementation of the embodiment of the optical signal modulation processing method is applied to the apparatus, and the same technical effects can be achieved.
The embodiment of the invention also provides an optical signal modulation processing system, which comprises the optical signal modulation processing device.
The system is a system to which the optical signal modulation processing method is applied, and the implementation of the embodiment of the optical signal modulation processing method is applied to the system, and the same technical effects can be achieved.
It is further noted that many of the functional units described in this specification have been labeled as modules, in order to more particularly emphasize their implementation independence.
In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.
Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.
When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
The exemplary embodiments described above are described with reference to the drawings, and many different forms and embodiments of the invention may be made without departing from the spirit and teaching of the invention, therefore, the invention is not to be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of elements may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values, when stated, includes the upper and lower limits of the range and any subranges therebetween.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. An optical signal modulation processing method, comprising:
sending a detection signal with a preset phase waveform to a modulator, wherein the modulator modulates an electric signal sent by a digital signal processor to a preset wavelength optical wave according to the preset phase waveform of the detection signal to obtain a target optical signal;
acquiring a target electrical signal obtained by converting the target optical signal;
determining a modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the target electric signal;
and sending the modulation phase sequence to the digital signal processor so that the digital signal processor sends an electric signal corresponding to the modulation phase sequence to the modulator.
2. The method of claim 1, wherein the step of sending the detection signal with the predetermined phase waveform to the modulator is preceded by the step of:
sending a voltage debugging signal to the modulator, wherein the modulator modulates an electric signal sent by a digital signal processor to a preset wavelength and then obtains a voltage debugging optical signal according to a preset phase waveform of the voltage debugging signal;
acquiring a voltage debugging electric signal obtained after the voltage debugging optical signal is converted;
and outputting a voltage adjusting signal to the modulator according to the voltage debugging electric signal, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
3. The optical signal modulation processing method according to claim 1, wherein before the step of obtaining the target electrical signal obtained by converting the target optical signal, the method further comprises:
and outputting a voltage adjusting signal to the modulator to enable the bias voltage of the modulator to be a third preset voltage value.
4. The method according to claim 3, wherein the step of determining the modulation phase sequence of the optical waves corresponding to the preset wavelength by the modulator according to the target electrical signal comprises:
filtering the target electric signal to obtain a first signal in a first polarization state and a second signal in a second polarization state;
determining phase relation information of the first signal and the second signal when the bias voltage of the modulator is a third preset voltage value;
and determining the modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the phase relation information.
5. The method of claim 2, wherein the step of sending the detection signal with the predetermined phase waveform to the modulator is preceded by the step of:
acquiring the signal quality of a voltage debugging electric signal when the bias voltage of the modulator reaches a first preset voltage value and the phase voltage reaches a second preset voltage value;
if the signal quality meets a preset condition, sending a detection signal with a preset phase waveform to a modulator; otherwise, the voltage adjusting signal is output to the modulator again.
6. The method of claim 1, wherein the step of sequentially sending the modulation phases to the digital signal processor is further followed by:
and turning off the detection signal, and outputting a voltage adjustment signal to the modulator to enable the bias voltage of the modulator to reach a first preset voltage value and the phase voltage to reach a second preset voltage value.
7. The optical signal modulation processing method according to claim 1, wherein the detection signal is a square wave scrambling signal or a sine wave scrambling signal.
8. An optical signal modulation processing apparatus, comprising:
the first sending module is used for sending a detection signal with a preset phase waveform to a modulator, wherein the modulator modulates an electric signal sent by the digital signal processor to a preset wavelength light wave according to the preset phase waveform of the detection signal to obtain a target optical signal;
the first acquisition module is used for acquiring a target electrical signal obtained by converting the target optical signal;
the determining module is used for determining the modulation phase sequence of the light wave with the preset wavelength corresponding to the modulator according to the target electric signal;
and the second sending module is used for sending the modulation phase sequence to the digital signal processor so as to enable the digital signal processor to send the electric signals corresponding to the modulation phase sequence to the modulator.
9. The optical signal modulation processing apparatus according to claim 8, further comprising:
the third sending module is used for sending a voltage debugging signal to the modulator before sending a detection signal with a preset phase waveform to the modulator, wherein the modulator modulates an electric signal sent by the digital signal processor to a preset wavelength and then obtains a voltage debugging optical signal according to the preset phase waveform of the voltage debugging signal;
the second acquisition module is used for acquiring the voltage debugging electric signal after the voltage debugging optical signal is converted;
and the first processing module is used for outputting a voltage adjusting signal to the modulator according to the voltage debugging electric signal, so that the bias voltage of the modulator reaches a first preset voltage value, and the phase voltage reaches a second preset voltage value.
10. The optical signal modulation processing apparatus according to claim 8, further comprising:
and the second processing module is used for outputting a voltage adjusting signal to the modulator before acquiring the target electrical signal obtained by converting the target optical signal, so that the bias voltage of the modulator is a third preset voltage value.
11. The optical signal modulation processing apparatus of claim 10, wherein the determining module comprises:
the first processing submodule is used for filtering the target electric signal to obtain a first signal in a first polarization state and a second signal in a second polarization state;
the first determining submodule is used for determining phase relation information of the first signal and the second signal when the bias voltage of the modulator is a third preset voltage value;
and the second determining submodule is used for determining the modulation phase sequence of the light wave corresponding to the preset wavelength by the modulator according to the phase relation information.
12. An optical signal modulation processing system comprising the optical signal modulation processing apparatus according to any one of claims 8 to 11.
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