CN112422182B - Multifunctional adjusting and measuring device and method for WDM (wavelength division multiplexing) optical module - Google Patents
Multifunctional adjusting and measuring device and method for WDM (wavelength division multiplexing) optical module Download PDFInfo
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- CN112422182B CN112422182B CN202011305754.XA CN202011305754A CN112422182B CN 112422182 B CN112422182 B CN 112422182B CN 202011305754 A CN202011305754 A CN 202011305754A CN 112422182 B CN112422182 B CN 112422182B
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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
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
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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
- H04B10/0799—Monitoring line transmitter or line receiver equipment
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Abstract
The invention discloses a multifunctional adjusting and measuring device and method for WDM wavelength division multiplexing optical modules, wherein a device error code meter and a multi-channel test board are arranged on the multi-channel test board, the transmitting end of each optical module is connected with an optical splitter, each optical splitter is respectively connected with an adjusting optical switch, an optical power meter and a wavelength meter, the adjusting optical switch is connected with an optical oscilloscope, the signal output end of each optical splitter is connected with an optical fiber, the optical fiber is connected with the signal input end of a receiving and testing device, and the signal output end of the receiving and testing device is connected with the receiving end of each optical module. The invention has the advantages that the debugging, testing, reporting and other functions are completed in one workstation, the simultaneous debugging and testing of 3 optical modules can be realized, the working state is automatically controlled and switched, the parallel running of the debugging and testing processes is ensured, the testing time is shortened, and the working efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of 5G communication modules, in particular to a multifunctional adjusting and measuring device and method for a WDM wavelength division multiplexing optical module.
Background
In the production process of the optical module, in order to obtain the nearly optimal product transmission performance index, BIAS current and MOD current of each product need to be correspondingly debugged, so that indexes such as average emitted light power, extinction ratio, eye pattern template margin, ascending and descending crossing points and the like of the product can be ensured to be in a proper range; the DDM report information of the product is calibrated according to SFF8472 protocol standard, and the DDM report information comprises indexes such as module power supply voltage, module temperature, emitted light power, received light power, BIAS current and the like; and testing module transmitting and receiving parameters, including transmitting wavelength, transmitting spectrum, transmitting turn-off voltage, receiving sensitivity, receiving alarm power, receiving overload power, DDM monitoring accuracy and other indexes; and the transmission performance of the optical module is also considered, and the optical module is subjected to transmission long fiber function test. Because the 5G front light module is used in severe environments such as an outdoor signal tower, the light module needs to ensure stable operation within the temperature range of-40 ℃ to 85 ℃.
The rapid construction of the 5G network has high-speed increase of the demand of the 25G color light module, so that the light module manufacturer needs to improve the product output under the condition of not increasing the investment. The traditional test technology generally adopts a computer to connect a test instrument to debug and test the optical modules on the test board, generally only 1 optical module is tested at a time, after one optical module is tested, the optical module is manually taken down, and the next optical module is installed on the test board for testing. Because of the numerous test items, the test temperature requirements of different test items are different, and the conventional test technology is respectively completed on a plurality of different stations for debugging, DDM calibration, index test and functional test.
Disclosure of Invention
In view of the above, the present invention provides a multifunctional device and method for adjusting WDM wavelength division multiplexing optical modules, which are used for solving the problems in the prior art.
A WDM wavelength division multiplexing optical module multifunctional adjusting and measuring device comprises a code error meter;
the multichannel test board, install a plurality of optical modules on the multichannel test board, the transmitting end of every optical module all is connected with an optical divider, and each optical divider links to each other with debugging optical switch, optical power meter and wavelength meter respectively, debugging optical switch links to each other with the oscilloscope, and the signal output part of every optical divider all is connected with an optic fibre, and optic fibre links to each other with receiving test device's signal input part, receiving test device's signal output part links to each other with each optical module's receiving end.
Preferably, the receiving and testing device comprises a light source module, a testing light switch connected with the light source module, and an optical attenuator connected with the signal output end of the testing light switch, wherein the signal output end of the optical attenuator is respectively connected with the receiving end of each light module.
Preferably, the number of light sources in the light source module is the same as the number of test light switches, and each test light switch is connected with its corresponding unique one of the light sources.
Preferably, the number of the test optical switches is the same as that of the optical modules, and the signal input end of each test optical switch is connected with the corresponding optical fiber.
Preferably, the multi-channel test plate is placed within a thermal flow meter.
A method for adjusting and measuring WDM wavelength division multiplexing optical module specifically comprises the following steps:
s1, placing a multi-channel test board of the multifunctional testing device of the WDM wavelength division multiplexing optical module in a heat flow instrument;
s2, setting the temperature regulation of the optical module through a heat flow instrument;
s3, one of the signal input ports of the debugging optical switch is opened, so that an optical signal emitted by one optical module is transmitted to the optical oscilloscope through the corresponding optical divider and the currently opened signal input port, and the driving current of the current optical module is gradually adjusted, so that the emission performance and the light-emitting wavelength of the current optical module meet the set requirements;
s4, sequentially switching and debugging signal input ports of the optical switch, repeating the step S3, and respectively debugging each optical module to enable the emission performance and the emission wavelength of each optical module to meet the set requirements;
s5, turning on each test optical switch, transmitting optical signals emitted by the light source module to the corresponding optical module through each test optical switch and the optical attenuator, adjusting the attenuation power of the optical attenuator, and simultaneously testing whether the receiving index of each optical module meets the requirement;
s6, controlling the optical signals sent by each optical module to be transmitted to a receiving end through the corresponding optical splitter, the corresponding optical fiber, the corresponding test optical switch and the corresponding optical attenuator, and simultaneously, sending test codes to each optical module by the error code meter to complete error rate self-loop test;
and S7, adjusting the temperature of the optical module, and repeating the steps S3-S6 to finish the adjustment test of the optical module at different temperatures.
Preferably, after the receiving index test of each optical module in step S5 is completed, DDM parameters of each optical module need to be read, and the DDM parameters of each optical module are compared with corresponding data measured by an external instrument, so as to ensure that the DDM parameters of each optical module meet the requirements.
Preferably, the DDM parameters of the optical module include DDM voltage, DDM temperature, DDM transmit power, and DDM receive power.
Preferably, the switching time of the signal output port of the debug optical switch in the step S4 is less than 0.1 seconds.
Preferably, the emission performance of the optical module includes an emission optical power and an extinction ratio.
The beneficial effects of the invention are as follows:
1. the invention can test 3 optical modules simultaneously, and the functions of debugging, testing, reporting and the like are completed in one workstation, and the debugging test signal realizes state transition through the switching of the input ports of the debugging optical switch and the testing optical switch, so that the 3 optical modules can carry out debugging and testing simultaneously, automatically control and switch the working state, ensure the parallel running of the debugging and testing processes, shorten the testing time and greatly improve the working efficiency.
2. After the multifunctional debugging device is adopted, the number of module debugging and testing operators is reduced by 60%, the debugging and testing time of a single module is reduced by 30 seconds, obvious economic benefits are obtained, and the multifunctional debugging device has high practical value.
3. After the multifunctional testing device is adopted, the times of the operator for plugging and unplugging the optical module and the test optical fiber are only 1/4-1/2 of those of the traditional testing method, and the operator can operate a plurality of machines by 1 person, so that the manual efficiency is improved; the equipment testing process reduces the interaction times with operators, improves the equipment utilization rate, does not depend on the operators to operate the plug modules at accurate time in the equipment testing process, reduces the equipment waiting time, reduces the labor intensity of the operators, and provides a pilot condition for realizing full-automatic test of automatic feeding and discharging of the optical modules in the later period.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present application is described in further detail below by way of specific embodiments and with reference to the accompanying drawings.
The invention provides a multifunctional adjusting and measuring device of a WDM wavelength division multiplexing optical module, which comprises an error code meter, a multi-channel test board, an optical module, an optical branching device, an adjusting optical switch, an optical oscilloscope, an optical power meter, a wavelength meter, an optical fiber, a test optical switch, an optical attenuator and a light source module.
The multi-channel test plate is placed in a heat flow meter. The multichannel test board is provided with a plurality of optical modules, the transmitting end of each optical module is connected with an optical splitter, each optical splitter is respectively connected with a debugging optical switch, an optical power meter and a wavelength meter, the debugging optical switch is connected with an optical oscilloscope, the signal output end of each optical splitter is connected with an optical fiber, the optical fiber is connected with the signal input end of a receiving test device, and the signal output end of the receiving test device is connected with the receiving end of each optical module.
The receiving test device comprises a light source module, a test light switch connected with the light source module and an optical attenuator connected with the signal output end of the test light switch, wherein the signal output end of the optical attenuator is respectively connected with the receiving end of each light module.
The number of the light sources in the light source module is the same as the number of the test light switches, and each test light switch is connected with a corresponding only one light source.
The number of the test optical switches is the same as that of the optical modules, and the signal input end of each test optical switch is connected with the corresponding optical fiber.
In this embodiment, three optical modules are installed on the multi-channel test board, and the transmitting end of each optical module is connected with an optical splitter, that is, three optical splitters are connected with the debug optical switch, the optical power meter and the wavelength meter, and the signal output end of each optical splitter is connected with an optical fiber. The three optical fibers are respectively connected to the three test optical switches, the three test optical switches are all connected with the optical attenuator, and the input ends of the three test optical switches are respectively connected with the corresponding light sources. The optical attenuators are respectively connected with the receiving ends of the three optical modules.
The invention relates to a method for adjusting and measuring a WDM wavelength division multiplexing optical module, which specifically comprises the following steps:
s1, placing a multi-channel test board of the multifunctional testing device of the WDM wavelength division multiplexing optical module in a heat flow instrument.
S2, setting the temperature regulation of the optical module through a heat flow instrument.
S3, one of the signal input ports of the debugging optical switch is opened, so that an optical signal emitted by one of the optical modules is transmitted to the optical oscilloscope through the corresponding optical divider and the currently opened signal input port, and the driving current of the current optical module is gradually adjusted, so that the emission performance and the emission wavelength of the current optical module meet the set requirements.
The driving current of the optical module includes BIAS current and MOD current.
The emission performance of the optical module includes the emitted optical power and the extinction ratio.
Specifically, it is assumed that a leftmost signal input port of the debug optical switch is turned on, an optical signal sent by the optical module 1 is transmitted to the optical oscilloscope through the optical splitter 1 and the leftmost signal input port of the debug optical switch, and then BIAS current and MOD current of the optical module 1 are adjusted step by step, so that emission performance and emission wavelength of the optical module reach set requirements.
S4, sequentially switching and debugging signal input ports of the optical switch, repeating the step S3, and respectively debugging each optical module to enable the emission performance and the emission wavelength of each optical module to meet the set requirements.
Specifically, after the emission debugging of the optical module 1 is completed, the signal input port of the intermediate position of the debugging optical switch is switched on, the optical signal sent by the optical module 2 is transmitted to the optical oscilloscope through the optical divider 2 and the signal input port of the intermediate position of the debugging optical switch, and then the BIAS current and the MOD current of the optical module 2 are adjusted step by step, so that the emission performance and the light-emitting wavelength of the optical module reach the set requirements.
After the emission debugging of the optical module 2 is completed, the right-most signal input port of the debugging optical switch is switched on, the steps are repeated, and the emission debugging of the optical module 3 is performed.
The switching time of the signal output port of the debug optical switch is less than 0.1 seconds.
S5, turning on each test optical switch, transmitting optical signals sent by the light source modules to the corresponding optical modules through each test optical switch and the optical attenuator, adjusting the attenuation power of the optical attenuator, and simultaneously testing whether the receiving index of each optical module meets the requirement.
The receiving indexes of the optical module comprise receiving indexes such as receiving sensitivity, receiving alarm power, receiving alarm removing power, receiving overload power and the like.
Specifically, the test optical switch B, C, D is turned on, so that the optical signals emitted by the three light sources in the light source module are respectively transmitted to the corresponding test optical switch B, C, D, the three test optical switches B, C, D transmit the received optical signals to the optical attenuators and transmit the received optical signals from the corresponding signal output ports of the optical attenuators to the corresponding optical modules, and then the attenuation power of the optical attenuators is adjusted, and meanwhile, whether the receiving index of each optical module meets the requirement is tested.
After the receiving index test of each optical module is finished, the DDM parameters of each optical module are read, and the DDM parameters of each optical module are compared with corresponding data obtained by measuring an external instrument, so that the DDM parameters of each optical module are ensured to meet the requirements.
The DDM parameters of the optical module include DDM voltage, DDM temperature, DDM transmit power, and DDM receive power.
This step may be performed in synchronization with step S3.
S6, controlling the optical signals sent by the optical modules to be transmitted to the receiving ends of the optical splitters, the optical fibers, the test optical switches and the optical attenuators which correspond to the optical modules, and simultaneously, sending test codes to the optical modules by the error code meter to finish error rate self-loop test.
And S7, adjusting the temperature of the optical module, and repeating the steps S3-S6 to finish the adjustment test of the optical module at different temperatures.
In this embodiment, the optical module may be tested in a normal temperature environment, -40 ℃ low temperature environment, and 85 ℃ high temperature environment, respectively.
The invention can test 3 optical modules simultaneously, and the functions of debugging, testing, reporting and the like are completed in one workstation, and the debugging test signal realizes state transition through the switching of the input ports of the debugging optical switch and the testing optical switch, so that the 3 optical modules can carry out debugging and testing simultaneously, automatically control and switch the working state, ensure the parallel running of the debugging and testing processes, shorten the testing time and greatly improve the working efficiency. After the multifunctional debugging device is adopted, the number of module debugging and testing operators is reduced by 60%, the debugging and testing time of a single module is reduced by 30 seconds, obvious economic benefits are obtained, and the multifunctional debugging device has high practical value.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (8)
1. The method for adjusting and measuring the WDM wavelength division multiplexing optical module is characterized by comprising the following steps of:
s1, placing a multi-channel test board of the multifunctional testing device of the WDM wavelength division multiplexing optical module in a heat flow instrument;
s2, setting the temperature regulation of the optical module through a heat flow instrument;
s3, one of the signal input ports of the debugging optical switch is opened, so that an optical signal emitted by one optical module is transmitted to the optical oscilloscope through the corresponding optical divider and the currently opened signal input port, and the driving current of the current optical module is gradually adjusted, so that the emission performance and the light-emitting wavelength of the current optical module meet the set requirements;
s4, sequentially switching and debugging signal input ports of the optical switch, repeating the step S3, and respectively debugging each optical module to enable the emission performance and the emission wavelength of each optical module to meet the set requirements;
s5, turning on each test optical switch, transmitting optical signals emitted by the light source module to the corresponding optical module through each test optical switch and the optical attenuator, adjusting the attenuation power of the optical attenuator, and simultaneously testing whether the receiving index of each optical module meets the requirement;
after the receiving index test of each optical module is finished, the DDM parameters of each optical module are read, and the DDM parameters of each optical module are compared with corresponding data obtained by measuring an external instrument, so that the DDM parameters of each optical module are ensured to meet the requirements;
the DDM parameters of the optical module comprise DDM voltage, DDM temperature, DDM transmitting power and DDM receiving power;
s6, controlling the optical signals sent by each optical module to be transmitted to a receiving end through the corresponding optical splitter, the corresponding optical fiber, the corresponding test optical switch and the corresponding optical attenuator, and simultaneously, sending test codes to each optical module by the error code meter to complete error rate self-loop test;
and S7, adjusting the temperature of the optical module, and repeating the steps S3-S6 to finish the adjustment test of the optical module at different temperatures.
2. The method according to claim 1, wherein the switching time of the signal output port of the optical switch is less than 0.1 seconds in step S4.
3. The method of tuning a WDM wavelength division multiplexing optical module of claim 1, wherein the emission performance of the optical module includes an emission optical power and an extinction ratio.
4. The method for testing a WDM wavelength division multiplexing optical module of claim 1, wherein the WDM wavelength division multiplexing optical module multifunctional testing device comprises:
a code error meter;
the multichannel test board, install a plurality of optical modules on the multichannel test board, the transmitting end of every optical module all is connected with an optical divider, and each optical divider links to each other with debugging optical switch, optical power meter and wavelength meter respectively, debugging optical switch links to each other with the oscilloscope, and the signal output part of every optical divider all is connected with an optic fibre, and optic fibre links to each other with receiving test device's signal input part, receiving test device's signal output part links to each other with each optical module's receiving end.
5. The method of tuning a WDM wavelength division multiplexing optical module of claim 4, wherein the reception test device includes a light source module, a test optical switch connected to the light source module, and an optical attenuator connected to a signal output terminal of the test optical switch, and signal output terminals of the optical attenuator are respectively connected to receiving terminals of the respective optical modules.
6. The method of tuning a WDM wavelength division multiplexing optical module of claim 5, wherein the number of light sources in the optical source module is equal to the number of test optical switches, each test optical switch being connected to its corresponding unique one of the light sources.
7. The method of tuning WDM wavelength division multiplexing optical module of claim 6, wherein the number of the test optical switches is equal to the number of the optical modules, and the signal input end of each test optical switch is connected to its corresponding optical fiber.
8. The method of tuning a WDM wavelength division multiplexing optical module of claim 4, wherein the multi-channel test board is placed in a thermal flow meter.
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| CN113037368B (en) * | 2021-03-01 | 2022-08-19 | 深圳市易飞扬通信技术有限公司 | Optical module testing system and method |
| CN113507318B (en) * | 2021-05-24 | 2022-11-15 | 武汉联特科技股份有限公司 | Automatic test system for time sequence parameters of QSFP28 optical module |
| CN114142924A (en) * | 2021-11-02 | 2022-03-04 | 苏州苏驼通信科技股份有限公司 | Optical module test platform |
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| CN114363740B (en) * | 2021-12-29 | 2024-09-20 | 中国电信股份有限公司 | Optical module, device, forward link system and performance detection method thereof |
| CN115372779B (en) * | 2022-08-18 | 2024-04-05 | 无锡芯光互连技术研究院有限公司 | Method and device for testing working state of thermo-optical switch array |
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| CN115733555B (en) * | 2023-01-10 | 2023-05-02 | 中天通信技术有限公司 | DWDM optical module transmitting end debugging method, device, equipment and computer medium |
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| CN107453806A (en) * | 2016-06-01 | 2017-12-08 | 成都芯瑞科技股份有限公司 | Optical module multichannel automates device for adjusting and measuring |
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