CN112311472A - Optical module receiving device, control method and storage medium - Google Patents
Optical module receiving device, control method and storage medium Download PDFInfo
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- CN112311472A CN112311472A CN202011514835.0A CN202011514835A CN112311472A CN 112311472 A CN112311472 A CN 112311472A CN 202011514835 A CN202011514835 A CN 202011514835A CN 112311472 A CN112311472 A CN 112311472A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/67—Optical arrangements in the receiver
- H04B10/671—Optical arrangements in the receiver for controlling the input optical signal
- H04B10/672—Optical arrangements in the receiver for controlling the input optical signal for controlling the power of the input optical signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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Abstract
The invention discloses an optical module receiving device, comprising: the signal processing module is used for outputting a digital signal according to the analog signal; the amplification module is used for receiving the incident light signal and amplifying the incident light signal to obtain an amplified light signal; the input end of the signal conversion module is connected with the amplifier, the output end of the signal conversion module is connected with the signal processing module, and the signal conversion module converts the amplified optical signal to obtain a differential electric signal; the sampling module is arranged between the signal conversion module and the signal processing module and is used for sampling the differential electric signal to obtain an analog signal; the control and regulation module is arranged between the amplification module and the signal processing module, the technical problems that the SOA is driven and controlled, the optical module meets the saturated optical power requirement and protects the device are solved, and the technical effects of automatically controlling the saturated optical power of the SOA and protecting the device are achieved.
Description
Technical Field
The present invention relates to the field of optical communication technologies, and in particular, to an optical module receiving apparatus, a control method, and a storage medium.
Background
With the accelerated development of the industries such as the internet, cloud computing and big data, the application of 100G products is wider and wider, the long-distance requirements are increased, and a new generation of optical modules with higher speed, smaller volume and lower power consumption are required in the market. Standard segregation of 100G ER 440 km and 100G ZR 480 km. Compared with the traditional CFP/CFP2 packaged optical module, the optical module has the advantages of lower power consumption, lower cost and smaller size. For an Optical module with a Semiconductor Optical Amplifier (SOA), how to drive and control the SOA enables the Optical module to meet the requirement of saturated Optical power, prevents the Optical power from damaging devices due to overlarge power, prevents the module from packet loss in long-distance transmission, and how to accurately report received Optical power, so that the accurate monitoring of the state of the module by a system is a key point of industrial research.
Disclosure of Invention
The invention mainly aims to provide an optical module receiving device, and aims to solve the technical problems of how to drive and control an SOA (service oriented architecture), so that an optical module meets the requirement of saturated optical power, and the device is prevented from being damaged due to overlarge optical power.
In order to achieve the above object, an optical module receiving apparatus according to the present invention includes: the signal processing module is used for outputting a digital signal according to the analog signal; the amplification module is used for receiving an incident light signal and amplifying the incident light signal to obtain an amplified light signal; the input end of the signal conversion module is connected with the amplifier, the output end of the signal conversion module is connected with the signal processing module, and the signal conversion module converts the amplified optical signal to obtain a differential electrical signal; the sampling module is arranged between the signal conversion module and the signal processing module, and samples the differential electric signal to obtain the analog signal; and the control and regulation module is arranged between the amplification module and the signal processing module and regulates the amplification module according to the digital signal.
Optionally, the signal conversion module includes: the input end of the decomposition multiplexing unit is connected with the amplifier, and the decomposition multiplexing unit decomposes the amplified optical signal to obtain a plurality of paths of optical signals; the input end of the photoelectric conversion module is connected with the output end of the decomposition multiplexing unit, and the photoelectric conversion module converts the plurality of paths of optical signals into a plurality of paths of electric signals; and the input end of the linear amplification unit is connected with the output end of the photoelectric conversion module, and the linear amplification unit converts the multiple paths of electric signals into multiple paths of differential electric signals.
Optionally, the photoelectric conversion module further includes: the photoelectric conversion unit is connected with the output end of the decomposition multiplexing unit and encodes the multiple paths of optical signals to obtain multiple paths of optical signals; and the plurality of photodiodes are connected with the photoelectric conversion unit and convert the plurality of paths of optical signals into a plurality of paths of optical signals.
Optionally, the sampling module samples multiple paths of the differential electrical signals to obtain multiple analog signals; the signal processing module outputs a plurality of digital signals according to a plurality of analog signals.
Optionally, the control and regulation module further comprises: the current control unit is arranged between the amplification module and the signal processing module and used for carrying out current regulation on the amplification module according to the digital signal; the protection unit is arranged between the current control unit and the sampling module, and the protection unit carries out gain adjustment on the current control unit according to the analog signals.
Optionally, the control and regulation module further comprises: the temperature control unit is arranged between the amplifying module and the signal processing module and adjusts the temperature of the amplifying module according to the digital signal.
Optionally, the apparatus further comprises: and the input end of the clock recovery module is connected with the output end of the signal conversion module, and the clock recovery module is used for performing clock recovery processing on the differential electric signal.
The present invention also provides a method for controlling an optical module receiving apparatus, which is applied to the optical module receiving apparatus described in any one of the above embodiments, and the method includes:
initializing the amplification module and setting a target temperature for the amplification module;
when the temperature of the amplifying module reaches the target temperature, acquiring an output light power value of the device;
adjusting the current value entering the amplifying module according to the relation between the output light power value and a preset light power range;
and acquiring and reporting the adjusted current input optical power value of the device.
Further, the obtaining and reporting the adjusted input optical power value of the apparatus includes: acquiring a current value entering the amplification module; searching a gain value corresponding to the current input optical power value according to a preset power table; acquiring a preset power calibration coefficient; and calculating an input optical power value of the device according to the current value, the gain value and the preset power calibration coefficient and reporting the input optical power value.
The present invention also provides a computer-readable storage medium having stored thereon a control program for an optical transceiver, the control program for an optical transceiver implementing the steps of the method for controlling an optical transceiver as described above when executed by a signal processing module.
An optical module receiving apparatus according to an aspect of the present invention includes: the signal processing module is used for outputting a digital signal according to the analog signal; the amplification module is used for receiving the incident light signal and amplifying the incident light signal to obtain an amplified light signal; the input end of the signal conversion module is connected with the amplifier, the output end of the signal conversion module is connected with the signal processing module, and the signal conversion module converts the amplified optical signal to obtain a differential electric signal; the sampling module is arranged between the signal conversion module and the signal processing module and is used for sampling the differential electric signal to obtain an analog signal; the control and regulation module is arranged between the amplification module and the signal processing module, the control and regulation module regulates the amplification module according to a digital signal, the signal conversion module converts an amplified optical signal of the amplification module, the sampling module samples a converted differential electrical signal to obtain an analog signal, the signal processing module outputs the analog signal as the digital signal, and the control and regulation module regulates the amplification module according to the digital signal to prevent the device from being damaged due to overlarge optical power, so that the technical problems of driving and controlling the SOA (service oriented architecture) and enabling the optical module to meet the saturated optical power requirement and protect the device are solved, and the technical effects of automatically controlling the saturated optical power of the SOA and automatically controlling the large optical protection device are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of an optical module receiving apparatus provided in an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an optical module receiving apparatus provided in the embodiment of the present invention;
fig. 3 is a first flowchart illustrating a method for controlling an optical module receiving apparatus according to an embodiment of the present invention;
fig. 4 is a second flowchart illustrating a control method for an optical module receiving apparatus according to an embodiment of the present invention;
fig. 5 is a third flowchart illustrating a control method for an optical module receiving apparatus according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
32 | |
| 2 | Amplifying |
311 | |
| 3 | |
312 | |
| 4 | |
51 | |
| 5 | |
52 | |
| 6 | |
53 | |
| 31 | Photoelectric conversion module |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" and/or "appears throughout, the meaning includes three parallel schemes, for example," A and/or B "includes scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The embodiment of the invention provides an optical module receiving device, an optical module receiving method and a storage medium.
Referring to fig. 1 to 2, in an embodiment of the present invention, the optical module receiving apparatus includes:
the signal processing module 1, the signal processing module 1 is used for outputting the digital signal according to the analog signal.
Specifically, the signal processing module 1 is an MCU (micro controller Unit), and the signal processing module 1 is configured to output a digital signal according to an analog signal. In the signal processing module 1, an analog-to-digital converter (ADC) 1-ADC4 acquisition port acquires analog electric signals in real time; the DAC1 outputs digital signals to control the output current of the SOA control circuit; the DAC2 is used to implement temperature control for the SOA. In addition, the device is also provided with an SDA data line and an SCL control line which are used for reporting the optical power to the Host terminal reporting module.
And the amplifying module 2 is used for receiving the incident light signal and amplifying the incident light signal to obtain an amplified light signal.
Specifically, the amplification module 2 is an SOA, and generally has two types of traveling wave amplification and resonant amplification, the material of the traveling wave SOA is the same as that of a general semiconductor laser, and the amplification waveband is near 1310 nm. The amplifying module 2 is configured to receive an incident light signal sent by the light input unit, and amplify the incident light signal to obtain an amplified light signal. The incident optical signal is a 4-Wavelength LWDM (LAN WDM, Wavelength Division Multiplexing) optical signal.
The input end of the signal conversion module 3 is connected with the amplifier, the output end of the signal conversion module 3 is connected with the signal processing module 1, and the signal conversion module 3 converts the amplified optical signal to obtain a differential electrical signal.
Specifically, the input end of the signal conversion module 3 is connected with the amplifier, the output end of the signal conversion module 3 is connected with the signal processing module 1, the signal conversion module 3 firstly performs demultiplexing on the amplified optical signal, and then converts the decomposed optical signal to obtain a differential electrical signal. Wavelength division multiplexing is to combine a series of optical carrier signals carrying various information with different wavelengths together by a Multiplexer (Multiplexer) at a transmitting end and couple the signals into the same optical fiber for transmission, and to separate the optical signals with various wavelengths by a Demultiplexer (Demultiplexer) at a receiving end.
And the sampling module 4 is arranged between the signal conversion module 3 and the signal processing module 1, and the sampling module 4 samples the differential electric signal to obtain an analog signal.
Specifically, the sampling module 4 is a sampling resistor R, the sampling module 4 is disposed between the Signal conversion module 3 and the Signal processing module 1, and the sampling module 4 samples the differential electrical Signal, converts the differential electrical Signal into a voltage as an RSSI (Received Signal Strength Indication) analog Signal, and is used for collecting and processing an interface of the analog-to-digital ADC1 of the MCU control unit.
And the control and regulation module 5 is arranged between the amplification module 2 and the signal processing module 1, and the control and regulation module 5 regulates the amplification module 2 according to the digital signal.
Specifically, the control and adjustment module 5 is disposed between the amplification module 2 and the signal processing module 1, and the control and adjustment module 5 adjusts the amplification module 2 according to the digital signal, including adjusting the driving current and the temperature of the amplification module 2. Because the SOA needs a constant driving current to amplify the optical signal and the working performance of the SOA is better within a set temperature range, the control and adjustment module 5 adjusts the amplification module 2 according to the digital signal and automatically controls the SOA to achieve the required saturated optical power.
Optionally, the signal conversion module 3 includes: the input end of the decomposition multiplexing unit is connected with the amplifier, and the decomposition multiplexing unit decomposes the amplified optical signal to obtain a plurality of paths of optical signals; the input end of the photoelectric conversion module 31 is connected with the output end of the decomposition multiplexing unit, and the photoelectric conversion module 31 converts the multi-channel optical signals into multi-channel electric signals; and the input end of the linear amplification unit 32 is connected with the output end of the photoelectric conversion module 31, and the linear amplification unit 32 converts the multiple paths of electric signals into multiple paths of differential electric signals.
Specifically, the input end of the demultiplexing unit is connected to the amplifier, and the demultiplexing unit demultiplexes the amplified optical signal to obtain a plurality of optical signals. The incident is an optical signal, an optical fiber contains 4 wavelengths of optical signals, the wavelengths are 1294.53nm-1296.59nm, 1299.02nm-1301.09nm, 1303.54nm-1305.63nm and 1308.09nm-1310.19nm respectively, the wavelength division demultiplexing is to separate the 4 wavelengths of the optical signals contained in 1 optical fiber through an optical path unit, and the technology of simultaneously transmitting two or a plurality of optical signals with different wavelengths in the same optical fiber is called wavelength division multiplexing, namely WDM. The input end of the photoelectric conversion module 31 is connected with the output end of the decomposition multiplexing unit, and the photoelectric conversion module 31 converts the multi-path optical signals into multi-path electric signals. After the 4-channel Non-return-to-zero (Non-return-to-zero) NRZ optical signals with LWDM wavelengths are converted into tiny NRZ electrical signals by the PIN photodiode 312, the tiny NRZ electrical signals are output to a linear trans-impedance amplifier TIA (trans-impedance amplifier), and the tiny electrical signals are amplified and converted into 4-channel NRZ differential electrical signals with certain amplitudes by the TIA.
The transmitting end loads the NRZ coding signal of the electric signal to the laser, so that the optical signal generated by the laser also conforms to the NRZ coding rule, namely the NRZ optical signal. In an actual link, after light is transmitted through an optical fiber at a long distance, light energy loss occurs in the optical fiber transmission process, and the light energy loss reaches the photodiode 312 at the receiving end, at this time, an optical signal is very weak, and an electrical signal converted by the photodiode 312 is also very weak, that is, a tiny NRZ electrical signal. The trans-impedance amplifier amplifies the received tiny signal and outputs the signal in a differential transmission mode. Differential transmission is a signal transmission technology, and is different from the traditional method of one signal wire and one ground wire, wherein the differential transmission transmits signals on the two wires, and the two signals have the same amplitude and opposite phases.
Optionally, the photoelectric conversion module 31 further includes: the photoelectric conversion unit 311, the photoelectric conversion unit 311 is connected with the output end of the decomposition multiplexing unit, and the photoelectric conversion unit 311 encodes the multiple optical signals to obtain multiple optical signals; the photodiodes 312, the photodiodes 312 are connected to the photoelectric conversion unit 311, and the photodiodes 312 convert the multiple optical signals into multiple optical signals.
Specifically, the photoelectric conversion unit 311 is connected to the output end of the demultiplexing unit, the photoelectric conversion unit 311 encodes the multiple optical signals to obtain multiple optical signals, wherein one end of the photoelectric conversion unit 311 receives incident light, the other end of the photoelectric conversion unit 311 is connected to the multiple photodiodes 312, the multiple photodiodes 312 convert the multiple optical signals into multiple optical signals, and 4 optical signals separated by the wavelength division demultiplexing element are converted into electrical signals by the PIN photodiodes 312. The photodiode 312 is a PIN type photodiode 312, also called a PIN junction diode, a PIN diode, a photodetector in which an I-type layer is generated between a P region and an N region in the vicinity of a PN junction between two semiconductors or a junction between a semiconductor and a metal, and light radiation is absorbed to generate a photocurrent.
Optionally, the sampling module 4 samples the multiple paths of differential electrical signals to obtain multiple analog signals; the signal processing module 1 outputs a plurality of digital signals according to a plurality of analog signals.
Specifically, the monitoring current flowing through the PIN photodiode 312 is converted into a voltage as an RSSI signal and sent to the port of the MCU control unit analog-to-digital ADC1 for collection processing. A mirror current circuit is arranged in the TIA, the current 1:1 of the photodiode 312 is output from a pin of the TIA, the current signal is reserved to GND through a resistor, voltage can be generated on the resistor, the voltage is collected through the MCU, the current of the photodiode 312 = the voltage/resistance value on the resistor, the current of the photodiode 312 is known through the voltage, and then the SOA is subjected to current control.
Optionally, the control and regulation module 5 further comprises: the current control unit 51, the current control unit 51 is set up between signal processing module 1 and the amplification module 2, the current control unit 51 carries on the current regulation to the amplification module 2 according to the digital signal; and the protection unit 52, the protection unit 52 is arranged between the current control unit 51 and the sampling module 4, and the protection unit 52 performs gain adjustment on the current control unit 51 according to a plurality of analog signals.
Specifically, the current control unit 51 is disposed between the amplification module 2 and the signal processing module 1, and the current control unit 51 adjusts the current of the amplification module 2 according to the digital signal. Since the SOA requires a constant driving current to amplify the optical signal, and the amplification gains of the optical signal corresponding to the magnitude of the current are different, the current control unit 51 mainly generates a current driving source capable of controlling the magnitude of the current. The protection unit 52 comprises a large optical protection unit 52 and a saturated optical power control unit, wherein the protection unit 52 is arranged between the current control unit 51 and the sampling module 4, the drive current of the SOA is set to be in an appointed negative gain state by monitoring the RSSI value of 4 paths of optical signals and rapidly controlling the SOA control unit through a hardware circuit if a certain path of signal exceeds a target set value, the input optical power is attenuated, an optical device is protected, meanwhile, the saturated optical power meets the index requirement, and the gain adjustment of the current control unit 51 is realized.
The RSSI signal values with 4 wavelengths correspond to the photocurrent received by the photodiode 312 with 4 wavelengths, and the input optical power can be known through the value and the gain of the SOA, and if the RSSI exceeds a certain value, the incident optical power is too high, and the gain of the SOA needs to be reduced, so that the protection module is not damaged or transmission problems occur.
Optionally, the control and regulation module 5 further comprises: the temperature control unit 53, the temperature control unit 53 is set between the amplifying module 2 and the signal processing module 1, the temperature control unit 53 adjusts the temperature of the amplifying module 2 according to the digital signal.
Specifically, the temperature control unit 53 is disposed between the amplification module 2 and the signal processing module 1, and the temperature control unit 53 is mainly configured to adjust the temperature of the amplification module 2 according to the digital signal, control a TEC (Thermoelectric cooler), and ensure that the SOA operates within a set temperature range, so that the SOA has better working performance. Under the same current and different temperatures, the optical amplification gains of the SOA are different, and if the thermoelectric cooler is not adopted for temperature control, the working temperature of the SOA is kept stable, and the stable SOA optical gain cannot be obtained, so that automatic gain control cannot be realized. The DAC2 is used for setting the control temperature of the temperature control unit 53, and the ADC5 and ADC6 are used for receiving information such as the temperature fed back by the temperature control unit 53.
Optionally, the optical module receiving apparatus further includes: and the input end of the clock recovery module 6 is connected with the output end of the signal conversion module 3, and the clock recovery module 6 is used for performing clock recovery processing on the differential electric signal.
Specifically, the input end of the clock recovery module 6 is connected to the output end of the signal conversion module 3, and the clock recovery module 6 (CDR) is an important component of the optical module, and is also called a clock recovery circuit. The photoelectric conversion module 31 is used for photoelectric conversion, a transmitting end converts an electrical signal into an optical signal, and a receiving end converts the optical signal into the electrical signal after the optical signal is transmitted through an optical fiber, and the clock recovery module 6 is mainly used for extracting a data sequence from the received electrical signal and recovering a clock timing signal corresponding to the data sequence, so as to recover the received specific information.
Because weak signals received by the TIA can have some noises after being amplified, when a circuit board is transmitted to an input end of the clock recovery module 6, the quality of the whole signal is not good due to the loss of the circuit board, the noise on the signal needs to be eliminated through the clock recovery module 6, the lost signal on the circuit board is compensated, and finally a high-quality signal is obtained and transmitted, so that the clock recovery module 6 is arranged to carry out clock recovery, amplification and equalization processing on alternating current differential signals output by the TIA, and finally, electric signals are output through a gold finger of an external interface optical module QSFP 28.
The QSFP28 golden finger is one of multiple packaging types of the optical module, and is used for the connection of the communication between the interior of the optical module and the switch, the golden finger is a hardware pin for the communication between the optical module and the outside, the definition of the pin is well regulated according to the protocol requirements of different packaging modules, and the electric signals of the golden finger are divided into two types. In a transmitting terminal, an exchange transmits an electrical signal to a module through a gold finger, and the module converts the signal into an optical signal. At the other receiving end, the photodiode 312 converts the optical signal into an electrical signal, and the electrical signal is processed inside the module and transmitted to the switch through a gold finger.
An optical module receiving apparatus provided in an embodiment of the present invention includes: the signal processing module 1, the signal processing module 1 is used for outputting the digital signal according to the analog signal; the amplifying module 2 is used for receiving the incident light signal and amplifying the incident light signal to obtain an amplified light signal; the input end of the signal conversion module 3 is connected with the amplifier, the output end of the signal conversion module 3 is connected with the signal processing module 1, and the signal conversion module 3 converts the amplified optical signal to obtain a differential electrical signal; the sampling module 4 is arranged between the signal conversion module 3 and the signal processing module 1, and the sampling module 4 samples the differential electric signal to obtain an analog signal; the control and regulation module 5, the control and regulation module 5 is arranged between the amplification module 2 and the signal processing module 1, the control and regulation module 5 regulates the amplification module 2 according to digital signals, the signal conversion module 3 converts amplified optical signals of the amplification module 2, the sampling module 4 samples the converted differential electrical signals to obtain analog signals, the signal processing module 1 outputs the analog signals to digital signals, and the control and regulation module 5 regulates the amplification module 2 according to the digital signals to prevent the device from being damaged due to overlarge optical power, so that the technical problems of driving and controlling the SOA and enabling the optical module to meet the saturated optical power requirement and protect the device are solved, and the technical effects of automatically controlling the saturated optical power of the SOA and protecting the device are achieved.
An embodiment of the present invention further provides a method for controlling an optical module receiving apparatus, which is applied to the optical module receiving apparatus, and with reference to fig. 3 to 5, the method includes:
step S101, initializing an amplification module 2, and setting a target temperature for the amplification module 2;
step S102, when the temperature of the amplifying module 2 reaches the target temperature, obtaining the output light power value of the device;
step S103, adjusting the current value entering the amplifying module 2 according to the relation between the output light power value and the preset light power range;
and step S104, acquiring and reporting the current input optical power value of the adjusted device.
Specifically, a thermistor is arranged inside the SOA to feed back the temperature of the SOA in real time, the DAC2 is used for setting the control temperature of the temperature control unit 53, and the ADC5 and the ADC6 are used for receiving information such as the temperature fed back by the temperature control unit 53. When the module receiving device is subjected to power control, the module receiving device is initialized firstly, the MCU sets the target temperature for the SOA of the amplification module 2, and then the gain of the SOA is set to be in a negative gain state, so that the device is prevented from being damaged by incoming large light. After initialization is completed, when the SOA reaches a target temperature, the output optical power at the moment is monitored through the RSSI, if the optical power is within a large optical power range defined by the module, the optical power is adjusted to be a corresponding large optical SOA gain, and the normal work of the module is ensured; if the optical power belongs to the optical power in the small optical range, adjusting the SOA gain in the small optical range corresponding to the SOA current; and if the optical power is in the intermediate range of the small light and the large light, adjusting the SOA current according to the optical power to adjust the SOA gain to be corresponding. Therefore, the SOA gain can be automatically controlled within the optical power range of the whole protocol, so that the module can normally work.
Further, obtaining and reporting the adjusted input optical power value of the device includes: acquiring the current value entering the amplification module 2; searching a gain value corresponding to the current input optical power value according to a preset power table; acquiring a preset power calibration coefficient; and calculating and reporting an input optical power value of the device according to the current value, the gain value and a preset power calibration coefficient.
Specifically, after the adjustment, the current value of the current entering the amplification module 2 is obtained first, and the current driving current value of the SOA of the amplification module 2 is read. Since the RSSI reflects the current received by the photodiode 312, the optical power received by the photodiode 312 can be calculated, and then the gain value corresponding to the current input optical power value is looked up according to the preset power table. If the optical power of the module needs to be known, the amplification gain of the SOA needs to be known, and then the incident optical power of the module is reversely pushed out, so that the optical power of the module can be reported correctly. Each module in the device can calibrate the optical power report, the power calibration coefficient of each module is stored in the calibration process, after the preset power calibration coefficient is obtained, the incident optical power value can be calculated and reported according to the SOA current, the calibration coefficient and the RSSI current, the accurate report of the optical power received by the optical module is effectively realized, and no packet loss occurs in the long-distance transmission of the module.
The present invention also provides a computer-readable storage medium having stored thereon a control program for an optical transceiver, the control program for an optical transceiver implementing the steps of the method for controlling an optical transceiver as described above when executed by a signal processing module.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An optical module receiving apparatus, comprising:
the signal processing module is used for outputting a digital signal according to the analog signal;
the amplification module is used for receiving an incident light signal and amplifying the incident light signal to obtain an amplified light signal;
the input end of the signal conversion module is connected with the amplifier, the output end of the signal conversion module is connected with the signal processing module, and the signal conversion module converts the amplified optical signal to obtain a differential electrical signal;
the sampling module is arranged between the signal conversion module and the signal processing module, and samples the differential electric signal to obtain the analog signal;
and the control and regulation module is arranged between the amplification module and the signal processing module and regulates the amplification module according to the digital signal.
2. The apparatus of claim 1, wherein the signal conversion module comprises:
the input end of the decomposition multiplexing unit is connected with the amplifier, and the decomposition multiplexing unit decomposes the amplified optical signal to obtain a plurality of paths of optical signals;
the input end of the photoelectric conversion module is connected with the output end of the decomposition multiplexing unit, and the photoelectric conversion module converts the plurality of paths of optical signals into a plurality of paths of electric signals;
and the input end of the linear amplification unit is connected with the output end of the photoelectric conversion module, and the linear amplification unit converts the multiple paths of electric signals into multiple paths of differential electric signals.
3. The apparatus of claim 2, wherein the photoelectric conversion module further comprises:
the photoelectric conversion unit is connected with the output end of the decomposition multiplexing unit and encodes the multiple paths of optical signals to obtain multiple paths of optical signals;
and the plurality of photodiodes are connected with the photoelectric conversion unit and convert the plurality of paths of optical signals into a plurality of paths of optical signals.
4. The apparatus of claim 2, wherein the sampling module samples a plurality of paths of the differential electrical signals to obtain a plurality of analog signals; the signal processing module outputs a plurality of digital signals according to a plurality of analog signals.
5. The apparatus of claim 3, wherein the control and regulation module further comprises:
the current control unit is arranged between the amplification module and the signal processing module and used for carrying out current regulation on the amplification module according to the digital signal;
the protection unit is arranged between the current control unit and the sampling module, and the protection unit carries out gain adjustment on the current control unit according to the analog signals.
6. The apparatus of claim 3, wherein the control and regulation module further comprises:
the temperature control unit is arranged between the amplifying module and the signal processing module and adjusts the temperature of the amplifying module according to the digital signal.
7. The apparatus of claim 1, further comprising:
and the input end of the clock recovery module is connected with the output end of the signal conversion module, and the clock recovery module is used for performing clock recovery processing on the differential electric signal.
8. A method for controlling a light module receiving apparatus, the method being applied to the light module receiving apparatus according to any one of claims 1 to 7, the method comprising:
initializing the amplification module and setting a target temperature for the amplification module;
when the temperature of the amplifying module reaches the target temperature, acquiring an output light power value of the device;
adjusting the current value entering the amplifying module according to the relation between the output light power value and a preset light power range;
and acquiring and reporting the adjusted current input optical power value of the device.
9. The method of claim 8, wherein the obtaining and reporting the adjusted input optical power value of the device comprises:
acquiring a current value entering the amplification module;
searching a gain value corresponding to the current input optical power value according to a preset power table;
acquiring a preset power calibration coefficient;
and calculating an input optical power value of the device according to the current value, the gain value and the preset power calibration coefficient and reporting the input optical power value.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a control program of an optical module receiving apparatus, which when executed by a signal processing module, implements the steps of the method for controlling an optical module receiving apparatus as claimed in claim 8.
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| CN113141215A (en) * | 2021-04-13 | 2021-07-20 | 索尔思光电（成都）有限公司 | SOA current automatic control method and system integrated in optical module |
| CN113985534A (en) * | 2021-10-19 | 2022-01-28 | 青岛海信宽带多媒体技术有限公司 | Optical module and SOA gain control method |
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| US20180069633A1 (en) * | 2016-09-07 | 2018-03-08 | Fujitsu Limited | Optical transmission device and optical communication system |
| CN209283247U (en) * | 2018-11-29 | 2019-08-20 | 深圳市易飞扬通信技术有限公司 | 100Gbps optical module |
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