CN107171721B - Method and system for detecting receiving optical power of multichannel laser - Google Patents
Method and system for detecting receiving optical power of multichannel laser Download PDFInfo
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- CN107171721B CN107171721B CN201710417853.9A CN201710417853A CN107171721B CN 107171721 B CN107171721 B CN 107171721B CN 201710417853 A CN201710417853 A CN 201710417853A CN 107171721 B CN107171721 B CN 107171721B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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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- 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
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Abstract
The invention discloses a method and a system for detecting the receiving optical power of a multichannel laser, comprising the following steps: acquiring a received light current value of a received light channel, and judging whether a light zone to which the received light belongs is a high light zone or a low light zone based on the received light current value; acquiring a temperature value of the laser, and determining whether a temperature zone to which the laser belongs is a low temperature zone, a normal temperature zone or a high temperature zone based on the temperature value; reading a first parameter and a second parameter of a received light power function based on the determined optical area and the temperature area; the received optical power of the received optical channel is determined based on the received optical power function. Compared with the existing table look-up method for determining the optical power, the method does not need to store a temperature and optical power relation table, occupies less storage space, enables the saved storage space to perfect other functions needing a memory, and solves the technical problem that the optical power algorithm of the existing optical module needs large storage space.
Description
Technical Field
The invention belongs to the technical field of optical fiber communication, and particularly relates to a method and a system for detecting the receiving optical power of a multichannel laser.
Background
The optical module is an important component of an optical fiber communication system, and the high-speed multi-channel optical module is small in size, large in unit volume bandwidth and increasingly widely applied to optical fiber communication.
The digital diagnosis optical module (DDMI) is also called an intelligent module, the optical module is designed by adding a chip and an auxiliary circuit, a network management unit can monitor the temperature, the power supply voltage, the laser bias and the transmitting and receiving optical powers of a transceiver module in real time, the measurement of the parameters provides a performance detection means for a system, the management unit can be helped to find out the position where a fault occurs in an optical fiber link, the maintenance work is simplified, the reliability of the system is improved, a method can also be provided for predicting the service life of the optical module, the bias current of a laser can be improved or reduced, the optical power of the laser can be improved or reduced along with the aging of the laser, the inclined efficiency of the laser can be reduced, and the service life of the laser can be roughly predicted by monitoring the optical power and the bias current of the optical module.
The optical power algorithm of the optical transceiver module is one of the core algorithms of the firmware, the existing commonly used optical power algorithm is a table lookup method, the table lookup is to store the temperature and optical power relation table entry in the EEPORM or FLASH of the optical module, the index of the table entry is the temperature, the optical power values of different temperature points are stored according to the sequence from low to high, after the temperature is calculated by the firmware, the optical power values of two temperature points before and after the latest are searched in the temperature optical power table, and the slope of the two points is used for calculating the optical power value of the middle temperature point, therefore, in order to improve the measurement accuracy of the optical power, the more the temperature points are better, but the more the temperature points are used for storing the table entry, the larger the capacity is required, but the EEPROM and FLASH resources of the optical module are limited, and.
Disclosure of Invention
The application provides a method and a system for detecting the receiving power of a multichannel laser, which solve the technical problem that the storage space required by the optical power algorithm of the existing optical module is large.
In order to solve the technical problems, the application adopts the following technical scheme:
a method for detecting the receiving optical power of a multichannel laser is provided, which comprises the following steps: acquiring a received light current value of a received light channel; judging the light area region to which the received light belongs based on the received light current value; acquiring a temperature value of a laser, and determining a temperature zone to which the laser belongs based on the temperature value; reading a first parameter and a second parameter of a received light power function based on the light area region and the temperature region; determining a received optical power of the received optical channel based on the received optical power function; the light area is divided into a high light area and a low light area; the temperature zone is divided into a low temperature zone, a normal temperature zone and a high temperature zone.
The system comprises a received light current value acquisition module, a light area division module, a temperature area division module, a received light power function parameter reading module and a received light power determination module; the receiving light current value acquisition module is used for monitoring and acquiring receiving light current values of all receiving light channels; the light zone division module is used for judging the light zone to which the received light belongs based on the received light current value of one received light channel; the temperature dividing module is used for acquiring a temperature value of the laser and determining the temperature zone of the laser based on the temperature value; the receiving optical power function parameter reading module is used for reading a first parameter and a second parameter of a receiving optical power function based on the optical area and the belonging temperature area; the receiving optical power determining module is used for determining the receiving optical power of the receiving optical channel based on the receiving optical power function; the light area is divided into a high light area and a low light area; the temperature zone is divided into a low temperature zone, a normal temperature zone and a high temperature zone.
Compared with the prior art, the application has the advantages and positive effects that: in the method and the system for detecting the receiving optical power of the multichannel laser, a receiving optical current value of each receiving optical channel of the laser is obtained, a set current value is used as a partition threshold value according to the receiving optical current value, the optical area partition to which the receiving light belongs is judged, when the receiving optical current value is larger than the partition threshold value, the receiving light belongs to a highlight area, and when the receiving optical current value is smaller than the partition threshold value, the receiving light belongs to a highlight area; a temperature value of the laser is also acquired, and the temperature zone of the laser is judged according to a temperature setting threshold value; in the application, parameters of a received light power function are different according to different light area divisions and temperature divisions, after the light area division and the temperature area are determined, a first parameter K and a second parameter D which are set by the received light power function Y = KX + D and correspond to the light area division and the temperature area are read, and then the received light power of a received light channel is determined according to the received light power function; furthermore, a received light power curve can be drawn according to a received light power function according to real-time monitoring of the received light current value, and smoothing processing is performed at the change position of the light area of the received light, so that a user can intuitively know the received light power condition of each channel. Compared with the mode of determining the optical power by the existing table look-up method, the received optical power detection method provided by the application does not need to store temperature and optical power relation table items, only needs to store a plurality of groups of parameters, occupies less storage space, enables the saved storage space to perfect other functions needing a memory, solves the technical problem that the storage space needed by the optical power algorithm of the existing optical module is large, and enables the received optical power detection precision to be higher because the parameters of the received optical power function are determined by adopting a light area division mode and a temperature area division mode, and smooth processing is carried out on adjacent light area divisions and temperature areas.
Other features and advantages of the present application will become more apparent from the detailed description of the embodiments of the present application when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart of a method for detecting received optical power of a multi-channel laser according to the present application;
fig. 2 is a system block diagram of a system for detecting optical power of a multi-channel laser.
Detailed Description
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
The method for detecting the receiving optical power of the multichannel laser, as shown in fig. 1, includes the following steps:
step S11: a received light current value of one received light channel is acquired.
For each receiving light channel of the laser, a receiving light current value within the receiving light channel is acquired.
Step S12: the light area section to which the received light belongs is determined based on the received light current value.
In the embodiment of the present application, the received light is divided into two light areas according to the value of the received light current: the receiving light with the receiving light current value higher than the set threshold is divided into a high light area, the receiving light with the receiving light current value smaller than the set threshold is divided into a low light area, the receiving light belongs to different light area partitions, and parameters corresponding to a receiving light power function in the subsequent steps are different.
Step S13: and acquiring a temperature value of the laser, and determining a temperature zone to which the laser belongs based on the temperature value.
In the embodiment of the present application, according to the laser, specifically to the driver chip of the laser, the temperature size divides three temperature zones: the low temperature area, the normal temperature area and the high temperature area can be determined according to the obtained temperature of the laser, the laser belongs to different temperature areas, and parameters corresponding to the received optical power function in the subsequent steps are different.
It should be noted that the sequence of step S13 and steps S11 and S12 is not specifically limited.
Step S14: and reading a first parameter and a second parameter of the received light power function based on the optical area region and the temperature region.
Take the received optical power function as Y = KX + D as an example, where K is the first parameter, D is the second parameter, Y is the received optical power, and X is the received optical current value of the received optical channel. And after the light area region to which the received light belongs and the temperature region to which the laser belongs are determined, reading corresponding first parameters and second parameters from the memory.
Different first parameters and second parameters are allocated according to different divisions of the optical area and the temperature area, and six different parameter combinations can be given in the embodiment of the application, as shown in the following table:
watch 1
| Partitioning | Parameter(s) |
| Highlight region + low temperature region | K1、D1 |
| Highlight region + normal temperature region | K2、D2 |
| Highlight region + high temperature region | K3、D3 |
| Low light region and low temperature region | K4、D4 |
| Low light region + normal temperature region | K5、D5 |
| Low optical region + high temperature region | K6、D6 |
In the embodiment of the application, the first parameter and the second parameter are read from the memory, so that before the light receiving power is calculated, the first parameter and the second parameter of the received light power function corresponding to all light zones and all temperature zones are read from the memory to be stored in the memory, whether the read parameters are all in the set range is judged, if yes, the read parameters are reserved for use, and if not, the read parameters are replaced by the preset set parameters, so that the accurate detection of the received light power is ensured.
Step S15: the received optical power of the received optical channel is determined based on the received optical power function.
After the first parameter and the second parameter are determined, the received light power is calculated with the received light current value as a variable according to the received light power function.
Step S16: and drawing and displaying a received light power curve of the received light channel.
Based on the monitored received light current value, the received light current value is taken as a horizontal axis, the received light power is taken as a vertical axis, a received light power curve of a received light channel is drawn, wherein based on real-time monitoring of the received light current value, a light region area and a temperature region where the received light is located change, a first parameter and a second parameter of a received light power function are determined to also change, therefore, the drawn received light power curve is a combined curve with a change of light slope, in order to optimize the received light power curve and improve the detection precision of the received light power, whether the light region area where the received light belongs changes or not can be judged, and/or in a mode of judging whether the temperature region of the laser changes or not, when the light region area where the received light belongs and/or the temperature region of the laser changes, the received light power curve is subjected to smoothing treatment on the change, for example, the curve is smoothed by performing an averaging process on both sides of the received light current value corresponding to the light partition, which is not limited in this embodiment.
The receiving optical power is detected and a receiving optical power curve is drawn in a coordinate system by adopting the steps aiming at a plurality of receiving optical channels of the laser, so that a user can intuitively know the receiving optical power condition of each receiving optical channel of the laser.
Compared with the conventional table look-up method for determining the optical power, the method for detecting the receiving optical power of the multichannel laser does not need to store a temperature and optical power relation table entry, only needs to store a plurality of groups of parameters, occupies a small storage space, can improve other functions needing a memory by the saved storage space, and solves the technical problem of large storage space needed by an optical power algorithm of the conventional optical module.
Based on the method for detecting the received optical power of the multichannel laser, the application also provides a system for detecting the received optical power of the multichannel laser, which comprises a received optical current value obtaining module 21, a light area division module 22, a temperature area division module 23, a received optical power function parameter reading module 24 and a received optical power determining module 25, as shown in fig. 2.
The received light current value obtaining module 21 is configured to monitor and obtain received light current values of all the received light channels; the light zone division module 22 is configured to determine, based on a received light current value of one received light channel, a light zone to which the received light belongs; the temperature dividing module 23 is configured to obtain a temperature value of the laser, and determine a laser temperature zone based on the temperature value; the received light power function parameter reading module 24 is configured to read a first parameter and a second parameter of the received light power function based on the optical area and the temperature zone to which the optical area belongs; the received light power determination module 25 is configured to determine the received light power of the received light channel based on the received light power function; the light area is divided into a high light area and a low light area; the temperature zone is divided into a low temperature zone, a normal temperature zone and a high temperature zone.
Specifically, the application provides a received optical power function of Y = KX + D; wherein, K is a first parameter, D is a second parameter, Y is the received optical power, and X is the received optical current value of the received optical channel.
The system for detecting the receiving optical power of the multi-channel laser further comprises a storage module 26, a parameter reading module 27, a memory 28, a parameter judging module 29 and a replacing module 30; the storage module 26 is configured to store first parameters and second parameters of the received optical power function corresponding to all optical zones and all temperature zones; the parameter reading module 27 is configured to read the first parameter and the second parameter of the received optical power function of 7 corresponding to all optical regions and all temperature regions from the 7 storage module 26 into the memory 28; the parameter judgment module 29 is used for judging whether the read parameters are all in the set range; if not, the replacing module 30 is configured to replace the read parameter stored in the storage module with the set parameter, so as to ensure the accuracy of the received optical power detection.
The multichannel laser receiving optical power detection system provided by the embodiment of the application further comprises a receiving optical power curve drawing module 31 and a receiving optical power curve display module 32; the received light power curve drawing module 31 is configured to draw a received light power curve of the received light channel after the received light power determination module determines the received light power of the received light channel; the received optical power display module 32 is used for displaying a received optical power curve. The received light power drawing module 31 further includes a correction unit 311; the correction unit 31 is configured to determine whether a light area region to which the received light belongs and/or a temperature region to which the laser device belongs changes based on the monitored received light current value and/or temperature value; if yes, smoothing is carried out on the received light power curve at the light area and/or temperature area change position.
The working method of the receiving optical power detection system of the multi-channel laser has been described in detail in the above-mentioned receiving optical power detection method of the multi-channel laser, and is not described herein again.
The multichannel laser receiving optical power detection method and the multichannel laser receiving optical power detection system provided by the application use the receiving optical power function, adopt the optical area partition and the temperature partition mode to determine the parameters of the receiving optical power function, and compared with the existing table look-up method for determining the optical power, the method does not need to store the temperature and optical power relation table items, only needs to store a plurality of groups of parameters, occupies a small storage space, enables the saved storage space to perfect other functions needing a storage, and solves the technical problem that the storage space needed by the optical power algorithm of the existing optical module is large. In addition, because the parameters of the received light power function are determined by adopting the light area division and temperature area division and smoothing processing is carried out on the adjacent light area division and temperature area, the detection precision of the received light power is higher.
It should be noted that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
Claims (6)
1. A method for detecting the receiving optical power of a multichannel laser is characterized by comprising the following steps:
acquiring a received light current value of a received light channel;
judging the light area region to which the received light belongs based on the received light current value;
acquiring a temperature value of a laser, and determining a temperature zone to which the laser belongs based on the temperature value;
reading a first parameter and a second parameter of a received light power function based on the light area region and the temperature region;
determining a received optical power of the received optical channel based on the received optical power function; the light area is divided into a high light area and a low light area; the temperature area is divided into a low temperature area, a normal temperature area and a high temperature area; assigning a first parameter and a second parameter with a combination of optical zone regions and temperature zones, the combination comprising: a high light region + low temperature region, a high light region + normal temperature region, a high light region + high temperature region, a low light region + low temperature region, a low light region + normal temperature region, and a low light region + high temperature region;
drawing and displaying a received light power curve of the received light channel;
in drawing and displaying a received light power curve of the received light channel, the method further includes:
judging whether the light area region to which the received light belongs and/or the temperature region to which the laser belongs are changed or not based on the monitored received light current value and/or the monitored temperature value; if so,
and smoothing the received light power curve at the change position of the light area and/or the change position of the temperature area.
2. The method for detecting the received optical power of a multi-channel laser as claimed in claim 1, wherein the received optical power function is Y = KX + D;
wherein K is the first parameter, D is the second parameter, Y is the received optical power, and X is the received optical current value of the received optical channel.
3. The method for detecting the received optical power of a multi-channel laser as claimed in claim 1, wherein before obtaining the received optical current value of one received optical channel, the method further comprises:
reading first parameters and second parameters of all light area regions and all temperature regions corresponding to the received light power function;
judging whether the read parameters are all in the set range, if not,
replacing the read parameters with set parameters.
4. A multichannel laser receiving optical power detection system is characterized by comprising a receiving optical current value acquisition module, an optical area division module, a receiving optical power function parameter reading module and a receiving optical power determination module;
the receiving light current value acquisition module is used for monitoring and acquiring receiving light current values of all receiving light channels;
the light zone division module is used for judging the light zone to which the received light belongs based on the received light current value of one received light channel;
the temperature zone dividing module is used for acquiring a temperature value of the laser and determining the temperature zone of the laser based on the temperature value;
the receiving optical power function parameter reading module is used for reading a first parameter and a second parameter of a receiving optical power function based on the optical area and the belonging temperature area;
the receiving optical power determining module is used for determining the receiving optical power of the receiving optical channel based on the receiving optical power function; the light area is divided into a high light area and a low light area; the temperature area is divided into a low temperature area, a normal temperature area and a high temperature area; assigning a first parameter and a second parameter with a combination of optical zone regions and temperature zones, the combination comprising: a high light region + low temperature region, a high light region + normal temperature region, a high light region + high temperature region, a low light region + low temperature region, a low light region + normal temperature region, and a low light region + high temperature region;
the system also comprises a receiving light power curve drawing module and a receiving light power curve display module;
the receiving optical power curve drawing module is used for drawing a receiving optical power curve of the receiving optical channel after the receiving optical power determining module determines the receiving optical power of the receiving optical channel;
the receiving optical power display module is used for displaying the receiving optical power curve;
the receiving optical power drawing module further comprises a correction unit;
the correction unit is used for judging whether the light area region to which the received light belongs and/or the temperature region to which the laser belongs changes or not based on the monitored received light current value and/or the monitored temperature value; and if so, smoothing the received light power curve at the change position of the light area and/or the change position of the temperature area.
5. The multi-channel laser receiving optical power detection system as claimed in claim 4, wherein the receiving optical power function is Y = KX + D;
wherein K is the first parameter, D is the second parameter, Y is the received optical power, and X is the received optical current value of the received optical channel.
6. The system for detecting the receiving optical power of the multi-channel laser as claimed in claim 4, wherein the system further comprises a storage module, a parameter reading module, a parameter judging module and a replacing module;
the storage module is used for storing first parameters and second parameters of all optical area regions and all temperature regions corresponding to the received optical power function;
the parameter reading module is used for reading the first parameters and the second parameters of the received optical power function corresponding to all optical area regions and all temperature regions from the storage module into the memory;
the parameter judgment module is used for judging whether the read parameters are all in a set range; and if not, the replacing module is used for replacing the read parameters stored by the storage module by using set parameters.
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| CN111510210A (en) * | 2020-04-16 | 2020-08-07 | 中航海信光电技术有限公司 | Parallel optical receiving module optical power test system |
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| CN102394692B (en) * | 2011-10-26 | 2014-09-03 | 索尔思光电（成都）有限公司 | DDMI optical module receiving end monitoring circuit and burst-mode luminous-power monitoring method thereof |
| CN102340350B (en) * | 2011-10-31 | 2014-06-11 | 索尔思光电（成都）有限公司 | DDMI (digital diagnostic monitoring interface) optical module transmitter circuit and optical power monitoring method for same |
| TW201338320A (en) * | 2012-03-05 | 2013-09-16 | Alpha Networks Inc | Method of controlling optical power and extinction ratio over full temperature range |
| CN103763024A (en) * | 2014-01-26 | 2014-04-30 | 索尔思光电（成都）有限公司 | Method for improving detection precision of APD in optical module |
| CN105656548A (en) * | 2016-01-29 | 2016-06-08 | 四川华拓光通信股份有限公司 | Gigabit-capable passive optical network-optical line terminal (GPON-OLT) burst receive optical power based detection system and application method thereof |
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Address after: 266100 Songling Road, Laoshan District, Qingdao, Shandong Province, No. 399 Patentee after: Qingdao Xinghang Photoelectric Technology Co.,Ltd. Address before: 266104 in the investment service center of Beizhai sub district office, beizhaike community, Laoshan District, Qingdao City, Shandong Province Patentee before: HISENSE & JONHON OPTICAL-ELECTRICAL TECHNOLOGIES Co.,Ltd. |