CN209472619U - A kind of test device for EDFA gain of light module - Google Patents
A kind of test device for EDFA gain of light module Download PDFInfo
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- CN209472619U CN209472619U CN201920310733.3U CN201920310733U CN209472619U CN 209472619 U CN209472619 U CN 209472619U CN 201920310733 U CN201920310733 U CN 201920310733U CN 209472619 U CN209472619 U CN 209472619U
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Abstract
The utility model discloses a kind of test devices for EDFA gain of light module, it is made of signal acquisition circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit, interface circuit and power circuit, pass through the circuit system in the utility model, the temperature information pumped in EDFA gain of light module, current information, input optical power size, Output optical power size can be monitored in real time, and the driving voltage of pumping is adjusted according to practical factory demand, to adjust Output optical power size, so that Output optical power size meets factory test request.A kind of test device for EDFA gain of light module provided by the utility model simplifies the work of EDFA gain of light module factory testing, improves production efficiency.
Description
Technical field
The utility model belongs to optical communication field, fills more particularly, to a kind of test for EDFA gain of light module
It sets.
Background technique
EDFA is the abbreviation of Erbium Doped Fiber Amplifier (erbium-doped fiber amplifier).It is to utilize optical fiber
The amplification of optical signal is realized in the stimulated radiation of the rare earth element adulterated in fibre core --- erbium.The birth of erbium-doped fiber amplifier is
The revolutionary breakthrough of fiber optic communication field, it makes it possible the fiber optic communication of long range, large capacity, high-speed, is DWDM system
System and following High Speed System, the indispensable important devices of all-optical network.It is researched and developed and application, has to the development of fiber optic communication
Important meaning.Since being succeeded in developing from First EDFA Erbium-Doped Fiber Amplifier by Southampton University of Southampton, EDFA is due to its height
Gain, low noise, coupling efficiency is high, and temperature polarization insensitive has many advantages, such as tens nanometers of amplification bandwidth, is widely used in
Optical communication system.
In the market, common EDFA mainly has two kinds of photoelectric integral EDFA module and EDFA gain of light module, wherein photoelectricity
Integrated EDFA not only has gain of light module, is provided simultaneously with active circuit module, therefore its volume is bigger than normal, has in application aspect
Certain limitation.And EDFA gain of light module is mainly light passive module, mainly includes 5 parts: Er-doped fiber
(EDF), photo-coupler (WDM), optoisolator (ISO), optical filter (Optical Filter), pumping source (Pumping
Supply), photodetector (PD, Photodiode)；Since it is mainly passive module, have it is small in size, low in energy consumption,
The features such as easy to use, can according to user using the case where be very easily mounted in various application systems, such as
In SDH rack, in CATV machine box, in dwdm system rack etc..
However, there is no the producers for much individually producing EDFA gain of light module on the market at present, therefore it is directed to EDFA light
The test circuit of gain module is also considerably less, is unable to satisfy the factory test of EDFA gain of light module.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the utility model provides a kind of for EDFA gain of light mould
The test device of block, its object is to pass through level-one pumping and second level in test circuit real-time monitoring EDFA optical power gain module
The temperature information of pumping, current information, input optical power size, Output optical power size, and adjust the driving electricity of level-one pumping
Stream, the driving current of diode pumping, the technology of factory test can not be carried out to EDFA gain of light module by thus solving the prior art
Problem.
To achieve the above object, it according to the one aspect of the utility model, provides a kind of for EDFA gain of light module
Test device characterized by comprising signal acquisition circuit, temperature detection circuit, decompression pumping driving circuit, master control electricity
Road, interface circuit and power circuit, the signal acquisition circuit, temperature detection circuit, decompression pump described in driving circuit warp
Interface circuit is connected to EDFA gain of light module to be measured；Wherein:
The signal acquisition circuit is connect with the governor circuit signal, to acquire EDFA gain of light module testing input light
Signal and output optical signal are simultaneously transmitted to the governor circuit；
The temperature detection circuit is connect with the governor circuit signal, for EDFA gain of light module pumping temperature letter
Number detection and monitoring；
The decompression pumping driving circuit is connect with the governor circuit signal, for EDFA gain of light module pumping electricity
The generation and adjusting of stream；
Test input optical signal, output optical signal and the pumping temperature letter of the governor circuit acquisition EDFA gain of light module
Number and handle, governor circuit output is for be depressured the PWM modulation signal for pumping driving circuit to adjust EDFA gain of light mould
Block pump voltage size；
The power circuit and the signal acquisition circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit
It is connected, to provide operating voltage.
Preferably, the test device for EDFA gain of light module, interface module are connecting terminal.
Preferably, the test device for EDFA gain of light module, connecting terminal include at least 30pin.
Preferably, the test device for EDFA gain of light module, connecting terminal are that AWG26-28 line footpath connects
Line terminals.
Preferably, the test device for EDFA gain of light module, temperature detection circuit includes thermistor,
The thermistor is attached on the EDFA gain of light module pumping shell so that the thermistor resistance value is with the EDFA light
Gain module pumps temperature linearity variation.
Preferably, the test device for EDFA gain of light module, thermistor are negative temperature coefficient heat-sensitive
Resistance.
Preferably, the test device for EDFA gain of light module, decompression pumping driving circuit be based on
The Buck conversion circuit of DCDC chip.
Preferably, the test device for EDFA gain of light module, further includes warning circuit, the alarm electricity
Road is connect with the governor circuit signal, to export for the test when the collected EDFA gain of light module of the governor circuit
It is sounded an alarm when optical signal and/or pumping temperature signal exception.
Preferably, the test device for EDFA gain of light module, warning circuit are LED light.
Preferably, the test device for EDFA gain of light module, interface circuit described in governor circuit are connected
Host computer is connected to expand.
In general, have the above technical solutions conceived by the present invention are compared with the prior art, with following
Beneficial effect:
(1) a kind of test device for EDFA gain of light module provided by the utility model, by signal acquisition circuit, temperature
Detection circuit, decompression pumping driving circuit, governor circuit, interface circuit and power circuit composition are spent, the utility model is passed through
In circuit system, it is big that temperature information, current information, the input optical power pumped in EDFA gain of light module can be monitored in real time
Small, Output optical power size, and the driving voltage pumped is adjusted according to practical factory demand, so that it is big to adjust Output optical power
It is small, so that Output optical power size meets factory test request.It is provided by the utility model a kind of for EDFA gain of light mould
The test device of block simplifies the work of EDFA gain of light module factory testing, improves production efficiency.
(2) a kind of test device for EDFA gain of light module provided by the utility model, interface circuit is by adopting
With AWG26-28 line footpath connecting terminal, with the connection for power cable and the communications cable, so that it is firm to reach circuit connection, and
It can guarantee that each circuit can be transferred through enough electric currents, while connecting terminal disconnects circuit at any time, without it
Weld or be intertwined, it is easy to operate, and device entirety wiring is beautiful, constructs and safeguards and is more convenient.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment 1；
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which: 1- inputs photoelectricity two
Pole pipe；The pumping of 2- level-one；3- diode pumping；4- output photoelectric diode；The first thermistor of 5-；The first reduction voltage circuit of 6-；7-
Connecting terminal；The second reduction voltage circuit of 8-；The second thermistor of 9-；10- main control chip；11- warning circuit.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.In addition, institute in the various embodiments of the present invention described below
The technical characteristic being related to can be combined with each other as long as they do not conflict with each other.
The utility model provides a kind of test device for EDFA gain of light module, as shown in Figure 1, comprising: signal
Acquisition Circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit, interface circuit and power circuit, the letter
Number Acquisition Circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit are connected to EDFA to be measured through the interface circuit
Gain of light module；Wherein:
The signal acquisition circuit is connect with the governor circuit signal, to acquire EDFA gain of light module testing input light
Signal and output optical signal are simultaneously transmitted to the governor circuit；
Preferably, the signal acquisition circuit uses photodiode, and the photodiode is preferably mini encapsulation
InGaAs photodiode, the rich safe science and technology Mini-Coaxial InGaAs PIN Photodiode of model, input electricity
Pressure is 5V, and detectable maximum input optical power is 10dBm；The photodiode is divided into input photodiode and output light
Electric diode, the input photodiode receive EDFA gain of light module testing input optical signal for monitoring described in input
The power of the light of EDFA gain of light module；The output photoelectric diode receive EDFA gain of light module testing output optical signal with
For monitoring the power for exporting the light of the EDFA gain of light module；
The temperature detection circuit is connect with the governor circuit signal, for EDFA gain of light module pumping temperature letter
Number detection and monitoring；
Preferably, the temperature detection circuit uses thermistor, preferably negative tempperature coefficient thermistor, model
Quick wound electric thin NTC thermistor；The negative tempperature coefficient thermistor is attached to the EDFA gain of light module pumping shell
Above so that the negative tempperature coefficient thermistor resistance value changes with EDFA gain of light module pumping temperature linearity, the master control
Circuit pumps temperature information by acquiring the negative tempperature coefficient thermistor resistance value to obtain the EDFA gain of light module.
The decompression pumping driving circuit is connect with the governor circuit signal, for EDFA gain of light module pumping electricity
The generation and adjusting of stream；
Preferably, the decompression pumping driving circuit is the Buck conversion circuit based on DCDC chip, DCDC chip
Electric current 0A~8A is exported so that decompression pumping driving circuit output voltage is+0.6V~+3.2V for ADP1872；
Test device provided by the utility model for EDFA gain of light module, decompression pump circuit is preferably first
Reduction voltage circuit and the second reduction voltage circuit, the pump being respectively used in the drive control and second level amplification of the pumping in first order amplification
The drive control at Pu.
Test input optical signal, output optical signal and the pumping temperature letter of the governor circuit acquisition EDFA gain of light module
Number and handle, governor circuit output is for be depressured the PWM modulation signal for pumping driving circuit to adjust EDFA gain of light mould
Block pump voltage size；
Preferably, the test device for EDFA gain of light module, governor circuit use STM32 master control core
Piece, preferably STM32F 103C8T6, provide inside the STM32 main control chip the independent analog-digital converter in 4 tunnels (AD1, AD2,
AD3, AD4), it is respectively used to the letter of input photodiode, the first thermistor, the second thermistor, output photoelectric diode
Number acquisition；The chip also provides 2 road pulse-width signal PWM1 (Pulse Width Modulation) and PWM2 simultaneously, respectively
For adjusting the output voltage of the first reduction voltage circuit and the second reduction voltage circuit, the drive of level-one pumping and diode pumping is adjusted with this
Dynamic voltage swing, realizes control function of power；The main control chip additionally provides serial communication interface RS232, with realize with it is upper
The protocol communication of position machine and control；Preferably, the governor circuit, RS232 interface are connected to expand with the interface circuit
It is connected to host computer, to realize and the protocol communication of host computer and control.
The interface circuit is by EDFA gain of light module to be measured and test circuit connection, and the signal acquisition circuit is through institute
It states interface circuit acquisition EDFA to be measured and outputs and inputs optical power signals；The temperature detection circuit is acquired through the interface circuit
EDFA to be measured pumps temperature signal；The decompression pumping driving circuit is through the interface circuit output signal to realize EDFA to be measured
The drive control of pumping；
Test device provided by the utility model for EDFA gain of light module, due to using multiple circuits, and it is every
A circuit requires to be powered, if each circuit is individually connected to power circuit, it will causes the complication of design, and shadow
Device whole design is rung, it is not convenient for safeguarding；And if being integrated into single line is connected to power circuit, it will cause line current is excessive,
The problems such as easy to damage；Therefore, to solve these problems, the utility model designs an interface circuit, the interface circuit and institute
Power circuit connection is stated, the power circuit is connected with the interface circuit and is electrically connected to the signal through the interface circuit
Acquisition Circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit, to provide operating voltage, so as to avoid other
The problems such as circuit is directly connected to power circuit and causes current overload, not convenient for safeguarding.
Preferably, the interface module uses connecting terminal, and the connecting terminal includes at least 30pin, line footpath
Preferably AWG26-28 line footpath, model is samtec TEM-120-02-03.0-G-D-L1-K-TR, described
AWG26-28 line footpath connecting terminal includes at least following wiring: 1 pair of power supply of level-one pumping；Due to diode pumping peak value work electricity
Stream is in 10A, therefore diode pumping supply lines is 10 pairs；The supply lines 1 for inputting photodiode is right, the confession of output photoelectric diode
Electric wire 1 is right；3, RS232 serial communication line, to carry out signal interaction with the governor circuit；It is firm to reach circuit connection,
And can guarantee that each circuit can be transferred through enough electric currents, while connecting terminal disconnects circuit at any time, without handle
They weld or are intertwined, easy to operate, and the wiring of device entirety is beautiful, and construction and maintenance are more square
Just.
The power circuit is+5V DC power supply, to provide operating voltage.
The test device for EDFA gain of light module, further includes warning circuit, the warning circuit and institute
The connection of governor circuit signal is stated, with the test output optical signal for working as the collected EDFA gain of light module of the governor circuit
And/or it is sounded an alarm when pumping temperature signal exception；
Preferably, the warning circuit is LED light, and the LED light is connect with the governor circuit signal, for working as institute
It is described when stating the test output optical signal and/or pumping temperature signal exception of the collected EDFA gain of light module of governor circuit
LED light is lighted to sound an alarm；Preferably, the LED light is that Shenzhen surmounts 0603 paster LED of photoelectricity.
The test device for EDFA gain of light module, further includes host computer, the governor circuit connects through RS232
Mouth is expanded and is connected to host computer, to carry out information exchange；The host computer is preferably terminal computer.
When work, the external+5V DC power supply of AWG26-28 line footpath connecting terminal, AWG26-28 line footpath connecting terminal will be to be measured
EDFA gain of light module and test circuit connection, AWG26-28 line footpath connecting terminal include following cable: input photodetector
Voltage detection cable it is a pair of, which accesses the AD1 of governor circuit ARM chip；The voltage detection line of output photoelectric detector
Cable is a pair of, which accesses the AD4 of governor circuit ARM chip；Cable 10 for pumping power supply is right；It is logical for RS232 serial ports
The cable of letter 3；The first thermistor and the second thermistor are respectively adhered on level-one pumping and second level using heat-conducting silicone grease
On the shell of pumping；When test, from the 1550nm signal light of the input terminal input -5dBm of EDFA gain of light module, the signal light
By 1:99 coupler, 1% end enters in input photodiode, and by the signal judgement of AD1 acquisition, input light meets at this time
It is required that；After input optical power reaches special value, by changing the duty ratio of the PWM1 in governor circuit, to realize to first
The increase to level-one pumping output power is realized in the increase of the output voltage of reduction voltage circuit；When the output of level-one power reaches special
After definite value, by changing the duty ratio of the PWM2 in governor circuit, to realize the increase of the output voltage to the second reduction voltage circuit,
Realize the increase to diode pumping output power；EDFA gain of light module exports the coupler of soft exchange 1:99, wherein 1% termination
Enter output photoelectric diode, for monitoring the power of output light, is sentenced by the voltage signal of the output photoelectric diode of AD4 acquisition
Whether the disconnected module of the EDFA gain of light at this time output power meets design requirement.
When work, when the test output optical signal and/or pumping temperature signal exception that governor circuit obtains, governor circuit
Driving warning circuit sounds an alarm, and LED light is lighted, and staff's failure is reminded, to avoid device failure；Meanwhile the master control
The test output optical signal and/or pumping temperature signal that circuit will acquire are transmitted to host computer by RS232 interface.
It is described further with reference to embodiments:
Embodiment 1: the utility model provides a kind of test device for EDFA gain of light module, as shown in Figure 1, packet
Include: signal acquisition circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit, interface circuit, warning circuit and
Power circuit；Wherein:
The signal acquisition circuit encapsulates InGaAs photodiode, the rich safe science and technology Mini- of model using mini
Coaxial InGaAs PIN Photodiode；The temperature detection circuit uses negative tempperature coefficient thermistor, and model is excellent
It is selected as quick wound electric thin NTC thermistor；The decompression pumping driving circuit is the buck converter electricity based on DCDC chip
Road, DCDC chip are ADP1872；The governor circuit use STM32 main control chip, model STM32F 103C8T6,
The independent analog-digital converter in 4 tunnels (AD1, AD2, AD3, AD4) is provided inside the STM32 main control chip, is respectively used to input light
The signal acquisition of electric diode, the first thermistor, the second thermistor, output photoelectric diode, governor circuit pass through RS232
Collected information is transmitted to host computer by interface；The chip also provides 2 road pulse-width signal PWM1 (Pulse simultaneously
Width Modulation) and PWM2, it is respectively used to adjust the output voltage of the first reduction voltage circuit and the second reduction voltage circuit, with this
To adjust the driving voltage size of level-one pumping and diode pumping, realization control function of power；The main control chip additionally provides
Serial communication interface RS232, to realize and the protocol communication of host computer and control；The interface module uses AWG26-28
Line footpath connecting terminal, connecting terminal 40pin, the AWG26-28 line footpath connecting terminal include at least following wiring: level-one
1 pair of the power supply of pumping；Since diode pumping peak operation current is in 10A, diode pumping supply lines is 10 pairs；Input photoelectricity
The signal acquisition line 1 of diode is right, and the signal acquisition line 1 of output photoelectric diode is right；3, RS232 serial communication line, with institute
It states governor circuit and carries out signal interaction；The power circuit is+5V DC power supply；The warning circuit is LED light, model
Shenzhen surmounts 0603 paster LED of photoelectricity.
When work, when the test output optical signal and/or pumping temperature signal exception that governor circuit obtains, governor circuit
Driving warning circuit sounds an alarm, and LED light is lighted, and staff's failure is reminded, to avoid device failure；Meanwhile the master control
The test output optical signal and/or pumping temperature signal that circuit will acquire are transmitted to host computer by RS232 interface.
The following are specific test process:
EDFA gain of light module to be tested includes with lower component in the present embodiment: Er-doped fiber (EDF), photo-coupler
(WDM), optoisolator (ISO), optical filter (Optical Filter), 2 pumping sources (Pumping Supply)；
In the present embodiment, EDFA gain of light module is connect with test device by 40pin connecting terminal, it is described
40pin connecting terminal external+5V DC power supply includes following cable in 40pin connecting terminal: inputting the voltage of photodiode
Cable a pair is detected, which accesses the AD1 of governor circuit ARM chip；The voltage detection cable of output photoelectric diode is a pair of,
The AD4 of signal access governor circuit ARM chip；Cable 10 for pumping power supply is right；Cable for RS232 serial communication
3.The first thermistor and the second thermistor are respectively adhered on level-one pumping and diode pumping using heat-conducting silicone grease first
Shell on；When test:
The signal light of the 1550nm of step 1:EDFA gain of light module input -5dBm, the signal light pass through 1:99 coupler,
1% end enters in input photodiode, for monitoring the power of input light, is inputted at this time by the signal judgement of AD1 acquisition
Light is met the requirements；
Step 2: after input optical power reaches special value, adjusting PWM1 signal, make the output electricity of the first reduction voltage circuit
Pressure reaches+1.6V, and the output power of level-one 980nm pumping at this time is 300mW；
Step 3: after the output of level-one power reaches particular value, adjusting PWM2 signal, make the output of the second reduction voltage circuit
Voltage reaches+3.2V, and the output power of second level 940nm pumping at this time is 8W；
Step 4:EDFA gain of light module exports the coupler of soft exchange 1:99, wherein 1% terminates into two pole of output photoelectric
Pipe passes through the voltage signal judgement EDFA light increasing at this time of the output photoelectric diode of AD4 acquisition for monitoring the power of output light
Beneficial module output power reaches 37dBm, meets design requirement, and detection is qualified.
In test process, when the test output optical signal and/or pumping temperature signal exception that governor circuit obtains, master control
Circuit drives warning circuit sounds an alarm, and staff's failure is reminded, to avoid device failure.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of test device for EDFA gain of light module characterized by comprising signal acquisition circuit, temperature sensing
Circuit, decompression pumping driving circuit, governor circuit, interface circuit and power circuit；The signal acquisition circuit, temperature are visited
Slowdown monitoring circuit, decompression pumping driving circuit are connected to EDFA gain of light module to be measured through the interface circuit；Wherein:
The signal acquisition circuit is connect with the governor circuit signal, to acquire EDFA gain of light module testing input optical signal
With output optical signal and be transmitted to the governor circuit；
The temperature detection circuit is connect with the governor circuit signal, for EDFA gain of light module pumping temperature signal
Detection and monitoring；
The decompression pumping driving circuit is connect with the governor circuit signal, for EDFA gain of light module pumping current
It generates and adjusts；
Test input optical signal, output optical signal and the pumping temperature signal of the governor circuit acquisition EDFA gain of light module are simultaneously
Processing, the governor circuit output is for being depressured the PWM modulation signal of pumping driving circuit to adjust EDFA gain of light module pump
Pu voltage swing；
The power circuit and the signal acquisition circuit, temperature detection circuit, decompression pumping driving circuit, governor circuit phase
Even, to provide operating voltage.
2. being used for the test device of EDFA gain of light module as described in claim 1, which is characterized in that the interface circuit mould
Block is connecting terminal.
3. being used for the test device of EDFA gain of light module as claimed in claim 2, which is characterized in that the connecting terminal is extremely
It less include 30pin.
4. being used for the test device of EDFA gain of light module as claimed in claim 2 or claim 3, which is characterized in that the terminals
Son is AWG26-28 line footpath connecting terminal.
5. being used for the test device of EDFA gain of light module as described in claim 1, which is characterized in that the temperature sensing electricity
Road includes thermistor, and the thermistor is attached on the EDFA gain of light module pumping shell so that the thermistor hinders
Value is with EDFA gain of light module pumping temperature linearity variation.
6. being used for the test device of EDFA gain of light module as claimed in claim 5, which is characterized in that the thermistor is
Negative tempperature coefficient thermistor.
7. being used for the test device of EDFA gain of light module as described in claim 1, which is characterized in that the decompression pumping is driven
Dynamic circuit is the Buck conversion circuit based on DCDC chip.
8. being used for the test device of EDFA gain of light module as described in claim 1, which is characterized in that further include alarm electricity
Road, the warning circuit are connect with the governor circuit signal, for working as the collected EDFA gain of light of the governor circuit
It is sounded an alarm when the test output optical signal and/or pumping temperature signal exception of module.
9. being used for the test device of EDFA gain of light module as claimed in claim 8, which is characterized in that the warning circuit is
LED light.
10. being used for the test device of EDFA gain of light module as described in claim 1, which is characterized in that the governor circuit
It is connected with the interface circuit to expand and be connected to host computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920310733.3U CN209472619U (en) | 2019-03-12 | 2019-03-12 | A kind of test device for EDFA gain of light module |
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| CN201920310733.3U CN209472619U (en) | 2019-03-12 | 2019-03-12 | A kind of test device for EDFA gain of light module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953643A (en) * | 2021-01-27 | 2021-06-11 | 电子科技大学 | FM-EDFA automatic gain control device |
-
2019
- 2019-03-12 CN CN201920310733.3U patent/CN209472619U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953643A (en) * | 2021-01-27 | 2021-06-11 | 电子科技大学 | FM-EDFA automatic gain control device |
| CN112953643B (en) * | 2021-01-27 | 2022-07-26 | 电子科技大学 | FM-EDFA automatic gain control device |
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