CN115765865A - 100G high-speed optical module three-temperature adjusting and testing system with flow test function - Google Patents
100G high-speed optical module three-temperature adjusting and testing system with flow test function Download PDFInfo
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Abstract
The invention discloses a 100G high-speed optical module three-temperature regulating and testing system with a flow test function, which comprises a flow tester, an error code meter, an optical attenuator, a wavelength division multiplexer, an optical splitter, an optical power meter, an intelligent clock recovery system, an optical oscillograph and a TEC controller, wherein the flow tester is used for measuring the flow of a light source; a signal switching instrument is arranged between the flow tester and the error code instrument; the output end of the flow tester/error code instrument is connected with the input end of the optical attenuator, the output end of the optical attenuator is connected with the input end of the wavelength division multiplexer, the output end of the wavelength division multiplexer is connected with the input end of the optical splitter, the output end of the optical splitter is respectively connected with the input ends of the flow tester/error code instrument, the optical power meter and the intelligent clock recovery system, and the intelligent clock recovery system is connected with the optical oscillograph; the TEC controller may automatically set the temperature. The system integrates the flow test and the high and low temperature debugging test, the temperature can be automatically set by setting the TEC controller, and the flow test can be automatically carried out after the optical parameters are tested.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a 100G high-speed optical module three-temperature adjusting and testing system with a flow test function.
Background
At present, 100G QSFP28 LR4 production debugging equipment of stage is high-low temperature case control high temperature, low temperature, normal atmospheric temperature debugging earlier, then high temperature, low temperature, normal atmospheric temperature test again, because high-low temperature case intensification cooling all relatively slow so need separately test, this needs 6 processes, then pulls out next station again and goes to carry out the test of beating this needs a process, therefore traditional test needs 7 processes at least to test. Referring to fig. 1, an internal distribution schematic diagram of a current 100 GQSFP28 LR4 production debugging device is shown, where the conventional debugging device includes an error code instrument device, and since the error code instrument device can only test an NRZ code pattern, and a network data stream is actually used by a client, the two formats are not consistent, so that the conventional debugging device needs to perform two processes when performing a flow test, that is, the first process performs adjustment and test of optical BOSA parameters, and the second process performs a flow test through an additional flow tester. The debugging and the streaming are completely independent and separated, so that the time and the labor are wasted, the optical fibers need to be plugged and unplugged in the two processes, the testing efficiency is influenced, and the equipment yield is also influenced by multiple plugging and unplugging; product circulation on-line increases the probability of shell scratching.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a 100G high-speed optical module three-temperature regulation and test system with a flow test function, which integrates a streaming test and a high-low temperature debugging test into a whole, automatically performs the flow test after optical parameters are tested, and can realize one-station test.
In order to achieve the purpose, the invention adopts the following technical scheme: a three-temperature adjusting and testing system of a 100G high-speed optical module with a flow test function comprises a flow tester, an error code meter, an optical attenuator, a wavelength division multiplexer, an optical splitter, an optical power meter, an intelligent clock recovery system, an optical oscillograph and a TEC controller;
a signal switching instrument is arranged between the flow tester and the error code instrument, the signal switching instrument receives an electric signal of the flow tester or the error code instrument, analyzes the received signal, recodes the signal, selects a corresponding signal according to software requirements, is connected to a light source through an RF head on the signal switching instrument, transmits the signal to the input end of the program control optical control system and finally inputs the signal to an optical port of a product;
the output end of the flow tester/error code instrument is connected with the input end of the optical attenuator, the output end of the optical attenuator is connected with the input end of the wavelength division multiplexer, the output end of the wavelength division multiplexer is connected with the input end of the optical splitter, the output end of the optical splitter is respectively connected with the input ends of the flow tester/error code instrument, the optical power meter and the intelligent clock recovery system, and the intelligent clock recovery system is connected with an optical oscilloscope;
the TEC controller can automatically set the temperature, and the TEC controller is used for replacing the function of the high-low temperature box; the TEC controller adopts water cooling for heat dissipation, is provided with a plurality of refrigerating fins, and is internally provided with outward-arranged fans, so that external hot air cannot enter the TEC controller, the TEC controller is always cold air inside, and ultra-low temperature adjustment is realized;
the emission of the product to be tested passes through a wavelength division multiplexer, the wavelength passes through an optical splitter for one to three, and the emission is respectively sent to a flow tester, an optical power meter and an intelligent clock recovery system, and finally reaches an optical wave indicator, so that the test of basic performance is completed;
during flow test, an optical signal comes out from an optical port of the flow tester/an optical port of the error code meter, passes through the optical attenuator and the wavelength division multiplexer, finally reaches a product to be tested, and then is output from a network port of the product to be tested and returns to the inside of the flow tester.
Furthermore, a main control chip of the flow tester is controlled by the FPGA, eight network bandwidth signals are output in the flow tester and then output to the MAC chip, the MAC chip can analyze internal data flow through output content, the data flow is converted into optical digital signals, and then the optical signals are sent out through the optical module.
The system further comprises an internal control card, wherein the internal control card comprises a power module, a logic control input port with an optical coupling isolation module, a logic main control chip, a PWM wave generator, a high-speed optical coupling isolation module and a general optical coupling isolation module;
the input end of the logic main control chip is connected with the output end of the logic control input port with the optical coupling isolation module, the output end of the logic main control chip is respectively connected with the input end of the PWM wave generator and the input end of the general optical coupling isolation module, and the output end of the PWM wave generator is connected with the input end of the high-speed optical coupling isolation module.
Further, the flow tester is an ethernet tester.
Furthermore, each channel of the device is provided with an independent eye diagram quality analyzer, so that the quality of the eye diagram can be analyzed in advance, a module with poor eye diagram comparison can be analyzed in advance, and the waste of resources of the eye diagram analyzer after the eye diagram analyzer enters the device is avoided.
The eye pattern quality analyzer comprises an optical power meter, a program-controlled optical attenuator and an FPGA high-speed sampling plate, and the working principle is that the optical power meter is used for detecting received optical power, the received optical power is attenuated to fixed received optical power through the program-controlled optical attenuator, sampling is carried out through high-speed sampling current of the FPGA, sampled points are displayed on a time domain panel, and the extinction ratio, the rise time, the fall time and the eye height of a transmitting eye pattern of a current test module can be read.
The TEC controller adopts liquid glass water, and then the liquid glass water is put into the industrial refrigerator to reach-45 ℃, so that the rapid and efficient heat dissipation is realized.
Heat insulation cotton is placed inside and outside the metal cover inside the TEC controller, so that a double-side heat insulation effect is formed, and cold air loss is prevented.
A temperature sensor is arranged in an optical module of the TEC controller, the temperature of the TECs on a plurality of surfaces is adjusted respectively by reading the temperature in the module, the control of a large-current PID is adopted, the temperature of each surface is controlled respectively by controlling a refrigerating sheet to adjust the specific temperature, and therefore the stability of the specific temperature is controlled.
The device integrates the flow test and the high and low temperature debugging test, the temperature can be automatically set by setting the TEC controller, the flow test can be automatically carried out after the optical parameters are tested, the error code can be tested, the flow can also be tested, and the one-station test can be realized. Compared with the traditional test, the invention has the following beneficial effects:
1. the manual and optical fiber plugging times are saved, the equipment yield is improved, and the shell scratching probability increased by online upstream transfer of products is avoided;
2. the equipment cost is saved, and the price is lower than that of respective equipment which is separately bought, debugged and streamed;
3. the whole software process can be controlled;
4. the device is provided with an automatic control card, 64 cylinders of 8-path private server motors can be independently controlled, a servo motor or a stepping motor can be controlled to control automatic material changing, and a client can conveniently realize automatic control under the condition of small modification;
5. the flow tester is arranged in the production debugging equipment, and the network packet is in the same format as the network packet actually used by a client, so that the production debugging equipment can be closer to the actual use.
Drawings
FIG. 1 is a block diagram of a conventional 100 GQSFP28 LR4 comprehensive tester;
FIG. 2 is a block diagram of the 100 GQSFP28 LR4 production commissioning system of the present invention;
FIG. 3 is a one-way block diagram of an integrated internal control card;
FIG. 4 is a flow chart of the conventional 100 GQSFP28 LR4 production debugging equipment;
FIG. 5 is a testing process of the 100 GQSFP28 LR4 production testing equipment of the present invention;
FIG. 6 is a schematic configuration diagram of the inside of the system of the present invention;
FIG. 7 is a basic block diagram of a conventional optical flow measurement process;
FIGS. 8-11 are flow charts of conventional optical test flows;
FIG. 12 is an internal block diagram of the flow meter of the present invention;
FIG. 13 is a basic block diagram of an eye diagram quality analyzer of the present invention;
FIG. 14 is a sample exemplary diagram of an eye diagram quality analyzer of the present invention;
FIG. 15 is a basic flow diagram of the system of the present invention;
fig. 16 is a schematic diagram of the signal switching device of the present invention.
Detailed Description
The following describes a specific implementation of the three-temperature regulation and measurement system of 100G high-speed optical module with flow rate test according to an embodiment and with reference to fig. 1 to 15.
A three-temperature adjusting and testing system of a 100G high-speed optical module with a flow test is shown in FIG. 6 and comprises a flow tester, an error code meter, an optical attenuator, a wavelength division multiplexer, an optical splitter, an optical power meter, an intelligent clock recovery system, an optical oscillograph and a TEC controller;
a signal switching instrument is arranged between the flow tester and the error code instrument, the signal switching instrument receives an electric signal of the flow tester or the error code instrument, analyzes the received signal, recodes the signal, selects a corresponding signal according to software requirements, is connected to a light source through an RF head on the signal switching instrument, transmits the signal to the input end of the program control optical control system and finally inputs the signal to an optical port of a product;
the output end of the flow tester/error code instrument is connected with the input end of the optical attenuator, the output end of the optical attenuator is connected with the input end of the wavelength division multiplexer, the output end of the wavelength division multiplexer is connected with the input end of the optical splitter, the output end of the optical splitter is respectively connected with the input ends of the flow tester/error code instrument, the optical power meter and the intelligent clock recovery system, and the intelligent clock recovery system is connected with an optical oscilloscope;
the TEC controller can automatically set the temperature, and the TEC controller is used for replacing the function of the high-low temperature box; the TEC controller adopts water cooling heat dissipation, is provided with a plurality of refrigerating fins, and is internally provided with outward-arranged fans, so that external hot air cannot enter the TEC controller, the TEC controller is always cold air inside, and ultra-low temperature adjustment is realized;
the emission of the product to be tested passes through the wavelength division multiplexer, the wavelength passes through the optical splitter for one to three, and the emission passes through the flow tester, the optical power meter and the intelligent clock recovery system respectively, and finally reaches the optical wave indicator, and the test of the basic performance is completed;
during flow rate test, an optical signal comes out from an optical port of the flow rate tester/an optical port of the error code detector, passes through the optical attenuator and the wavelength division multiplexer, finally reaches a product to be tested, and then is output from a network port of the product to be tested and returns to the inside of the flow rate tester.
The signal switching instrument is a high-frequency and high-speed signal switching tool made of FPGA, an FPGA board capable of testing flow information and a board capable of independently testing sensitivity, and the middle part of the signal switching instrument is connected with a program control by a high-frequency switch. The general working principle of the signal switching instrument is as follows: 2 into one output (as shown in figure 16).
The working principle of the signal switching instrument is as follows: the received signal can be a test signal or a network signal, signal clock separation is firstly carried out, then the signal is unlocked according to CDR in the FPGA, then signal restoration is carried out according to the locked signal, and the signal is sent again according to a target format.
The signal switching instrument receives the electric signal of the flow tester or the error code instrument, analyzes the received signal, recodes the signal, selects a corresponding signal according to the software requirement, is connected to the light source through the RF head on the signal switching instrument, sends the signal to the input end of the program control optical control system, and finally inputs the signal to the optical port of the product.
Flow tester: it is a device that can simulate the authentication of a network packet used by a user, and is generally a code pattern transmitted in accordance with the network format actually used by the user.
Error code instrument: the device is a device specially used for testing the sending and receiving of products, and can only send test patterns, such as the PRBS7, the PRBS23, the PRBS3 and the like, and confirm whether the products have problems or not through the size of the loop-back packet loss rate.
Optical port/error code instrument: because our product is mainly optical module, it is light to send and receive, so no matter it is error code meter or flow tester, must convert the electrical signal into the optical signal to send, so must add a light source to convert.
The flow test needs to be performed by looping back, so that an optical signal comes out from an optical port of the flow tester/an optical port of the error code meter, passes through the optical attenuator and the wavelength division multiplexer, finally reaches a product to be tested, is output from a network port of the product to be tested and returns to the flow tester, and then whether packet loss and an error code rate exist or not is judged according to an FPGA chip in the flow tester. The advantage of this test is close to user's reality, because the general test is for the error code appearance simulation PRBS pattern, and the user uses the network data stream, so the difference before this, this application test system can be very close to customer's use.
The emission of the product to be tested passes through the wavelength division multiplexer, the 1310-segment wavelength can pass through the optical splitter 1 to 3, the flow tester, the optical power meter and the intelligent clock recovery system and finally reaches the eye pattern instrument (optical oscillograph), so that the basic performance such as optical power, extinction ratio, eye pattern optical jitter, eye pattern rising edge and eye pattern falling edge can be tested. Parameters such as reception monitoring, RX advanced de-alarm, saturated optical power, etc. may still be tested with respect to the receiving portion of the product under test.
The TEC controller is used to replace the high and low temperature cabinet function because typical TEC control temperatures typically act at 40 degrees of room temperature depending on the efficiency of heat dissipation, while our module requires-45 degrees of ambient temperature. In order to realize low temperature control, the following means are adopted:
1. the system for water-cooling heat dissipation is modified, air used by a common TEC is circulated to dissipate heat, so the heat dissipation efficiency is not very high, water-cooling heat dissipation is adopted, but common cooling water freezes at 0 DEG, so liquid glass water is adopted in the system, and then the liquid glass water is placed in the industrial refrigerator to reach-45 ℃, so that the heat dissipation with higher efficiency can be realized.
2. Adopt the refrigeration piece of a plurality of faces, the surface of the abundant contact product of ability makes its quick cooling, and general TEC all only designs one face, because the upper surface needs upper and lower control, and this makes the system relatively complicated, because this system has automatic control system, so the cylinder can be relaxed in this cooperation realize having the module push down, rises when pulling out the module.
3. The reason that traditional control can't accomplish so low temperature still be exactly thermal-insulated not good of doing, and the metal covering the inside that this application designed and the outside has all placed thermal-insulated cotton, forms two-sided thermal-insulated effect, prevents that air conditioning from running off.
4. In addition, when the fan is used at a low temperature, water vapor can be introduced, which is one of the reasons that the traditional control cannot be realized;
5. temperature control: the TEC control is characterized in that the control of the specific temperature is the most important, the temperature sensors are arranged in the optical module, the temperature of the TECs on the plurality of surfaces can be respectively adjusted by reading the temperature in the module, and the specific temperature can be adjusted by respectively controlling the temperature of each surface by using the control of a large-current PID (proportion integration differentiation) for controlling the refrigerating sheet.
As shown in fig. 2, in the adjustment and measurement equipment produced by 100G QSFP28 in the embodiment of the present application, the error detector is added to the streaming equipment, so that the cost of the streaming quantity can be saved, and the cost is not increased. As shown in fig. 4 and 5, for the testing process of the conventional debugging device and the debugging device in the embodiment of the present application, it can also be seen from the process that the improved device does not increase much in the testing time.
Referring to fig. 12, a main control chip of the flow tester is controlled by the FPGA, and the eight internal network bandwidth signals are output and then output to the MAC chip, and the MAC chip can analyze internal data streams through output contents, convert the data streams into optical digital signals, and then send the optical signals out through the optical module.
In this embodiment, preferably, the optical fiber coupler further includes an internal control card, as shown in fig. 3, where the internal control card includes a power module, a logic control input port with an optical coupling isolation module, a logic main control chip, a PWM wave generator, a high-speed optical coupling isolation module, and a general optical coupling isolation module;
the input end of the logic main control chip is connected with the output end of the logic control input port with the optical coupling isolation module, the output end of the logic main control chip is respectively connected with the input end of the PWM wave generator and the input end of the general optical coupling isolation module, and the output end of the PWM wave generator is connected with the input end of the high-speed optical coupling isolation module.
Preferably, in this embodiment, the traffic tester is an ethernet tester.
The controller capable of independently controlling 64 cylinders of 8-path private server motors is further integrated in the 100G QSFP28 LR4 production debugging and testing system with the flow test, full-automatic feeding and discharging can be achieved, and automatic control can be conveniently achieved by customers under the condition of small modification. The logic control input port is provided with an optical coupling isolation module for receiving signals sent by a sensor in the whole test system so as to inform the logic main control chip of the actual position of a module to be tested, the logic main control chip can control the air cylinder and the motor conveniently, the PWM wave generator and the high-speed optical coupling isolation module are used for transmitting control signals of the logic main control chip to the motor, the universal optical coupling isolation module for the air cylinder is used for transmitting control signals of the logic main control chip to the air cylinder, and the internal control card can realize the control of 8-path motors and 64-path air cylinders.
In this embodiment, each channel of the device preferably has an independent eye diagram quality analyzer, which can analyze the quality of the eye diagram in advance, and a module with poor eye diagram comparison can analyze the eye diagram in advance, thereby avoiding wasting the resources of the eye diagram after entering the eye diagram.
The eye diagram quality analyzer is an auxiliary device capable of replacing an optical eye diagram analyzer, and comprises an optical power meter, a program-controlled optical attenuator and an FPGA high-speed sampling plate inside. The main working principle is as follows: and detecting the received optical power by using an optical power meter, attenuating the received optical power to a fixed received optical power by using a program-controlled optical attenuator, sampling by using high-speed sampling current of an FPGA (field programmable gate array), and displaying the sampled point on a time domain panel. As shown in fig. 14, we can read the extinction ratio, the rise time, the fall time, and the eye height of the transmission eye pattern of the current test module from the pattern. The configuration is then modified and retested, which can thus replace part of the eye diagram instrument's role.
Since the price of the optical oscillograph is expensive and only one channel can be used for testing, which is a great test for the testing cost, for example, fig. 13 is a basic block diagram of an eye diagram quality analyzer, the eye diagram signal analyzer recovers and restores the received signal through an algorithm according to the signal received by a receiving device, then depicts the restored signal sample again, and then finds out parameters related to the eye diagram quality, such as the eye height, the eye width and the like of the eye diagram through the algorithm. And then passes through an optical attenuator to cooperate with controlling the magnitude of the input light to confirm whether the limit value is reached.
As can be seen from the flow charts of the conventional optical test flow in fig. 8-11, the high temperature, the low temperature, and the normal temperature of the conventional production debugging system need to be separately tested, and the flow high and low temperatures need to be separately tested according to this method, which requires many processes. However, as shown in fig. 15, in the system of the present application, after the temperature of the TEC controller is set and the temperature is stabilized, the first to fourth channels are debugged, and after the module test is completed, the flow tester is configured to directly perform the flow test. The invention integrates the flow test and the high and low temperature debugging test into a whole, the TEC controller can automatically set the temperature, and the flow test can be automatically carried out after the optical parameters are tested.
The foregoing is a detailed description of the preferred embodiments of the present patent, and it should be understood that this invention is not limited to the embodiments described above, but rather, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a take three temperature regulation of 100G high-speed optical module of flow test system which characterized in that: the device comprises a flow tester, an error code meter, an optical attenuator, a wavelength division multiplexer, an optical splitter, an optical power meter, an intelligent clock recovery system, an optical oscilloscope and a TEC controller;
a signal switching instrument is arranged between the flow tester and the error code instrument, the signal switching instrument receives an electric signal of the flow tester or the error code instrument, analyzes the received signal, recodes the signal, selects a corresponding signal according to software requirements, is connected to a light source through an RF head on the signal switching instrument, sends the signal to an input end of a program control optical control system and finally inputs the signal to an optical port of a product;
the output end of the flow tester/error code instrument is connected with the input end of the optical attenuator, the output end of the optical attenuator is connected with the input end of the wavelength division multiplexer, the output end of the wavelength division multiplexer is connected with the input end of the optical splitter, the output end of the optical splitter is respectively connected with the input ends of the flow tester/error code instrument, the optical power meter and the intelligent clock recovery system, and the intelligent clock recovery system is connected with the optical oscillograph;
the TEC controller can automatically set the temperature, and the TEC controller is used for replacing the function of the high-low temperature box; the TEC controller adopts water cooling heat dissipation, is provided with a plurality of refrigerating fins, and is internally provided with outward-arranged fans, so that external hot air cannot enter the TEC controller, the TEC controller is always cold air inside, and ultra-low temperature adjustment is realized;
the emission of the product to be tested passes through the wavelength division multiplexer, the wavelength passes through the optical splitter for one to three, and the emission passes through the flow tester, the optical power meter and the intelligent clock recovery system respectively, and finally reaches the optical wave indicator, and the test of the basic performance is completed;
during flow rate test, an optical signal comes out from an optical port of the flow rate tester/an optical port of the error code detector, passes through the optical attenuator and the wavelength division multiplexer, finally reaches a product to be tested, and then is output from a network port of the product to be tested and returns to the inside of the flow rate tester.
2. The three-temperature regulating and testing system with the flow test function for the 100G high-speed optical module according to claim 1, characterized in that: the main control chip of the flow tester is controlled by the FPGA, eight network bandwidth signals are output in the main control chip and then output to the MAC chip, the MAC chip can analyze internal data flow through output content, the data flow is converted into optical digital signals, and then the optical signals are sent out through the optical module.
3. The 100G high-speed optical module three-temperature regulation and measurement system with the flow test function according to claim 1, wherein: the system also comprises an internal control card, wherein the internal control card comprises a power module, a logic control input port with an optical coupling isolation module, a logic main control chip, a PWM wave generator, a high-speed optical coupling isolation module and a general optical coupling isolation module;
the input end of the logic main control chip is connected with the output end of the logic control input port with the optical coupling isolation module, the output end of the logic main control chip is respectively connected with the input end of the PWM wave generator and the input end of the general optical coupling isolation module, and the output end of the PWM wave generator is connected with the input end of the high-speed optical coupling isolation module.
4. The 100G high-speed optical module three-temperature regulation and measurement system with the flow test function according to claim 1, wherein: the flow tester is an Ethernet tester.
5. The 100G high-speed optical module three-temperature regulation and measurement system with the flow test function according to claim 1, wherein: each channel of the device is provided with an independent eye pattern quality analyzer, the quality of an eye pattern can be analyzed in advance, a module with poor eye pattern comparison can be analyzed in advance, and the waste of resources of the eye pattern analyzer after the eye pattern analyzer enters the device is avoided.
6. The 100G high-speed optical module three-temperature regulation and measurement system with the flow test function according to claim 5, wherein the three-temperature regulation and measurement system comprises: the eye pattern quality analyzer comprises an optical power meter, a program-controlled optical attenuator and an FPGA high-speed sampling plate, and the working principle is that the optical power meter is used for detecting received optical power, the received optical power is attenuated to fixed received optical power through the program-controlled optical attenuator, sampling is carried out through high-speed sampling current of the FPGA, sampled points are displayed on a time domain panel, and the extinction ratio, the rise time, the fall time and the eye height of a transmitting eye pattern of a current test module can be read.
7. The 100G high-speed optical module three-temperature regulation and measurement system with the flow test function according to claim 1, wherein: the TEC controller adopts liquid glass water, and then the liquid glass water is put into the industrial refrigerator to enable the liquid glass water to reach minus 45 ℃ so as to accelerate heat dissipation.
8. The 100G high-speed optical module three-temperature regulation and measurement system with the flow test function according to claim 1, wherein: heat insulation cotton is placed inside and outside the metal cover inside the TEC controller, so that a double-sided heat insulation effect is formed, and cold air loss is prevented.
9. The three-temperature regulating and testing system with the flow test function for the 100G high-speed optical module according to claim 1, characterized in that: the temperature sensors are arranged in the optical module, the TEC temperatures of a plurality of surfaces are respectively adjusted by reading the temperature in the module, the control of a large-current PID is adopted, and the temperature of each surface is respectively controlled by controlling the refrigerating sheet to adjust the specific temperature, so that the stability of the specific temperature is controlled.
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