CN106197951B - A kind of Active Optical Fiber photon darkens the circuit system of test - Google Patents
A kind of Active Optical Fiber photon darkens the circuit system of test Download PDFInfo
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- CN106197951B CN106197951B CN201610590373.8A CN201610590373A CN106197951B CN 106197951 B CN106197951 B CN 106197951B CN 201610590373 A CN201610590373 A CN 201610590373A CN 106197951 B CN106197951 B CN 106197951B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
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Abstract
The invention discloses the circuit systems that a kind of Active Optical Fiber photon darkens test, the system includes mainly core control and state detection circuit, working state indicating circuit, the pulse laser seed pumping driving circuit of power, frequency, adjustable pulse width, the level-one of power adjustable pumps laser driving circuit, the diode pumping high power laser driving circuit and power detection circuit of power adjustable.Beneficial effects of the present invention：Devise a kind of semiconductor laser device driving circuit that a control is more, it constitutes Active Optical Fiber photon and darkens a kind of required optical fiber laser circuit system of test, the seed source power of the optical fiber laser, frequency, adjustable pulse width, level-one pumps and diode pumping power adjustable, disclosure satisfy that the Active Optical Fiber photon under different parameters setting darkens test；And the power test circuit built in system is devised, the integrated testing that the system of realization darkens Active Optical Fiber photon.
Description
Technical field
The invention belongs to measuring techniques for optical fiber fields, and the electricity of test is darkened more particularly, to a kind of Active Optical Fiber photon
Road system.
Background technology
With the rapid development of optical communication technique, optical fiber laser also has gradually developed, and as optical fiber laser
The stability of main gain media, active rare earth doped fiber is extremely important, and wherein photon darkening is that one of them is very important
Parameter, it is a kind of induction absorption loss phenomenon that photon, which darkens effect, and doped fiber sandwich layer background loss can be caused permanently to increase,
So test rare earth doped fiber photon darkening is very important.
Invention content
The technical problem to be solved by the present invention is to darken effect for active rare earth doped fiber photon, provide a kind of survey
Examination Parameter adjustable, the operation is stable, can integrated testing photon darken effect and show the circuit system of test result.
Used technical solution is the present invention to solve above-mentioned technical problem：
A kind of Active Optical Fiber photon darkens the circuit system of test, including core control and state detection circuit, work shape
State indicating circuit, seed source driving circuit, level-one pumping driving circuit, diode pumping driving circuit and optical power detecting electricity
Road.The core control and state detection circuit include central processing unit and peripheral circuit, seed source control and state-detection connects
Mouth, level-one pumping control and state detection interfaces, diode pumping control and state detection interfaces, optical power detecting and temperature sensing
Device interface, condition indication circuit interface, Computer Communications Interface.The central processing unit and peripheral circuit by high speed processor,
Processor minimum system and high speed D/A, AD and processor I/O port composition, are control, detect and acquire the core of other circuit modules
Center portion point；Seed source control and state detection interfaces, level-one pumping control and state detection interfaces, diode pumping control and
State detection interfaces, optical power detecting and temperature sensor interface, condition indication circuit interface, Computer Communications Interface are respectively
Connect seed source driving circuit, level-one pumping driving circuit, diode pumping driving circuit, optical power detecting circuit, working condition
The interface of indicating circuit and computer.
The working state indicating circuit includes working status indication interface and mode indicator part；The work shape
State indicating device is indicator light or LCD liquid crystal displays, and indicating mode is that indicator light is bright, goes out, flickers or LCD liquid crystal display states.
The seed source driving circuit includes seed source driving interface, location status circuit, pulse generating circuit, switch electricity
Road, constant current source driving circuit, PWM temperature control circuits, die power detection circuit, seed source tube core, plug-and-play circuit.The position
Status circuit is made of pull-up resistor, and core control and state detection circuit are by judging that low and high level judges inserting for seed source
Pull out state；The pulse generating circuit can be 5~500KHz, pulsewidth tune by control and regulation frequency and pulsewidth, frequency-tuning range
Adjusting range is 5~500ns；The switching circuit is made of analog switch or relay, controls the driving shape to constant-current source circuit
State；The constant current source driving circuit generates driving current driving seed source and shines, and driving current is adjustable, and with sample resistance,
The actual value of driving current is acquired, closed-loop feedback circuit is formed, ensures driving current constant, while judging constant current source driving circuit
Working condition；The constant-current source driving current is adjustable, and current range is 0~1A, current regulation sensitivity 0.25mA；The PWM temperature
Control circuit control tube core is operated in temperature constant state, with TEC semiconductor coolers, thermistor composition closed loop feedback control electricity
The working condition of tube core is effectively ensured in road；The die power detection circuit includes photoelectric switching circuit, amplifying circuit, acquisition
Tube core Output optical power size judges tube core output power stability, forms closed-loop control, ensures the stable luminous power of output,
The working condition of detectable tube core simultaneously；Several working conditions feedback of seed source driving circuit can be very good to judge seed source
Failure cause, location status judge whether seed source circuit connects, driving current working condition feedback judge constant-current source whether work
Make normally, tube core optical power feedback judges whether tube core is working properly, the failures such as whether disconnected fibre of optical fiber, its comprehensive three kinds of states inspections
Survey, can with investigation basic fault point；The seed resource module that the driving circuit is formed, short term power stability<±0.005dB@
15min, long-time stability<±0.02dB@8h.
The level-one pumping driving circuit includes level-one pumping driving interface, location status circuit, switching circuit, constant-current source
Driving circuit, PWM temperature control circuits, die power detection circuit, seed source tube core, plug-and-play circuit, various pieces it is basic
Circuit function is similar with seed source driving circuit.The level-one pump module that the driving circuit is formed, short term power stability<±
0.005dB@15min, long-time stability<±0.02dB@8h.
The diode pumping driving circuit packet diode pumping driving interface, location status circuit, switching circuit, radiation air
Fan, high constant-current source driving circuit, die power detection circuit, seed source tube core, plug-and-play circuit.Wherein diode pumping is driven
Mobile interface, location status circuit, switching circuit, die power detection circuit, plug-and-play circuit basic function and seed source drive
Circuit is similar.The high constant-current source driving circuit is driven using the constant-current source circuit or PLD constant currents of high-power MOS tube composition
Dynamic circuit, 0~10A of drive current range；The radiator fan starts while tube core drives, it is heat sink to tube core and tube core into
Sector-style is cold；The diode pumping tube core output power is larger, and heat dissipation capacity is larger, while being dissipated using heat sink passive heat dissipation and air-cooled active
The mode of heat；The diode pumping module that the driving circuit is formed relies primarily on closed loop feedback and software algorithm carries out power stability
Control, power stability<±0.02dB.
The optical power detecting circuit, including luminous power probe, photoelectric switching circuit, signal amplification circuit optical power detecting
Circuit interface and temperature sensor circuit.The luminous power probe, photoelectric switching circuit, signal amplification circuit are will to pass through to be tested
The luminous power of optical fiber is converted to electric signal, is amplified to the voltage range for facilitating processing；The temperature sensor circuit is detection work(
The actual temperature situation of rate probe segment, and temperature-compensating is carried out to detection of optical power according to temperature change；Photodetection electricity
Road module photoelectricity formula is as follows：
Φ=U/Z (1)
Wherein Φ is detection of optical power, and U is collection voltages value, and Z is detector sensitivity, and wherein Z is affected by temperature, so
Temperature-compensating is carried out, temperature-compensating formula is as follows：
Z=Z0+(T-T0)*ZC (2)
Wherein Z0For the normal sensibility at a temperature of correction, ZCFor the linear correction factor relative to normal sensibility, T0For
Temperature is corrected, T is actual temperature.
Z in formula (2)0、T0、ZCIt is particular value, T is the value of temperature sensor detection, it can thus be concluded that going out the Z values after temperature compensation；
U is the opto-electronic conversion voltage value of circuit acquisition in formula (1), and final probe power can be got by formula (2) and formula (1)
Value；The optical power detecting circuit power range of receiving：0~50W, the linearity<± 0.5%, repeatability<1%.
The operation principle of the present invention：It is controlled by computer, sets the pulse laser warp that the seed source of parameter is sent out
It crosses the first isolator and pumps the pump light exported with the level-one for setting driving current after WDM synthesizes light beam, by putting in advance
Big active doping optical fibre, then passes through the second isolator and the pump light for the diode pumping output for setting driving current passes through respectively
Signal end and the pumping end of optical-fiber bundling device are crossed, the light exported after economic cooperation beam provides measurement letter for active doping optical fibre to be measured
Number, signal is coupled to power probe after active doping optical fibre, and the power voltage value of optical power detecting circuit acquisition returns to
Computer carries out data processing, finally obtains brightness test result.
Description of the drawings
Fig. 1 is the structural schematic diagram of core control and state detection circuit of the present invention；
Fig. 2 is the structural schematic diagram of condition indication circuit of the present invention；
Fig. 3 is the structural schematic diagram of seed source driving circuit of the present invention；
Fig. 4 is the structural schematic diagram of level-one pumping driving circuit of the present invention；
Fig. 5 is the structural schematic diagram of diode pumping driving circuit of the present invention；
Fig. 6 is the structural schematic diagram of optical power detecting circuit of the present invention；
Fig. 7 is the structure chart of Active Optical Fiber brightness optical system for testing system of the present invention；
Fig. 8 is the structure chart of Active Optical Fiber brightness test circuit system of the present invention；
Fig. 9 is the structure chart that Active Optical Fiber photon of the present invention darkens test total system；
In all the appended drawings, identical reference numeral is used for indicating identical element or structure, wherein：
1- seed source driving circuits, the first isolators of 2-, 3- level-ones pump driving circuit, 4- level-one pump protection devices, 5-
Wavelength division multiplexer, 6- pre-amplification active doping optical fibres, the second isolators of 7-, 8- diode pumping driving circuits, 9- diode pumpings are protected
Protect device, 10- optical-fiber bundling devices, 11- tested optical fibers, 12- optical power detecting circuits.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
Shown in referring to Fig.1~Fig. 8, Active Optical Fiber photon of the present invention darkens the circuit system of test, including core
Control and state detection circuit, working state indicating circuit, seed source driving circuit, level-one pumping driving circuit, diode pumping
Driving circuit, optical power detecting circuit, the above circuit are attached according to light path and the joint demand of electrical connection, are formed final
Test system.
Core shown in Fig. 1 controls and state detection circuit includes central processing unit and peripheral circuit, seed source control and shape
State detect interface, level-one pumping control and state detection interfaces, diode pumping control and state detection interfaces, optical power detecting and
Temperature sensor interface, condition indication circuit interface, Computer Communications Interface.Wherein line represents electrical connection, arrow direction
The direction of representation signal carries out circuit design according to this principle schematic.
Working state indicating circuit shown in Fig. 2 includes working status indication interface and mode indicator part.Main electricity
Gas sense is directed toward mode indicator part by interface, can be indicator light or LED, specific instruction content includes that power supply refers to
Show, seed source, level-one pumping, the position of diode pumping, operation, malfunction, the communications status of computer and system.According to institute
State the specific implementation that content carries out circuit design.
Fig. 3, Fig. 4, Fig. 5 are seed source driving circuit, level-one pumping driving circuit and diode pumping driving circuit respectively
Schematic diagram.The most circuit design of three is similar, identical circuit design part include location status circuit, switching circuit,
Die power detection circuit, plug-and-play circuit.Location status circuit is made of pull-up resistor；Switching circuit by analog switch or after
Electric appliance forms；Die power detection circuit turns potential circuit, filter circuit, signal by photodiode, operational amplifier, electric current
Amplifying circuit forms, and optical signal is switched to current signal, and current signal switchs to voltage signal, filtered, appropriate to amplify.Seed source
Pulse-generator circuit in driving circuit is the FPGA module programming row by high speed into frequency, adjustable pulse width；Seed source drives
PWM temperature control circuits in circuit and level-one pumping driving circuit, are made of temperature controlling chip, TEC refrigerators, thermistor；Kind
Constant-current source circuit in component driving circuit and level-one pumping driving circuit is by high speed D/A, operational amplifier, metal-oxide-semiconductor, sampling electricity
Resistance etc. collectively constitutes；High constant-current source driving circuit in diode pumping driving circuit is by high speed D/A, amplifier, high-power MOS
Pipe, sample resistance are collectively constituted or are made of high speed D/A, PLD driving circuits, sample resistance.Specific circuit design implements root
It is carried out according to the electrical connection of Fig. 3,4,5 and above-mentioned details.
Fig. 6 is power detection circuit diagram.Including luminous power probe, photoelectric switching circuit, signal amplification circuit, light work(
Rate detection circuit interface, temperature sensing circuit.Wherein luminous power probe, photoelectric switching circuit, signal amplification circuit are by reception
Laser signal is converted to the electric signal for being suitble to acquisition, and temperature sensor circuit provides temperature for optical power detecting circuit and measures, into
Trip temperature compensates, and circuit design is with reference to Fig. 6.
Designed each circuit module portion is connected in a manner of optical device in light path system.Connection type is according to Fig. 7
Shown in Active Optical Fiber brightness optical system for testing system diagram.As seen from the figure, involved in light path to module be respectively seed source driving
Circuit 1, level-one pumping driving circuit 3, diode pumping driving circuit 8 and optical power detecting circuit 12.Specific implementation is such as
Shown in Fig. 7, seed source driving circuit 1 is distinguished through the first isolator 2 and level-one pumping driving circuit 3 through level-one pump protection device 4
Synthesized after into the both ends of wavelength division multiplexer (WDM) 5 a branch of signal through pre-amplification active doping optical fibre 6 and the second isolator 7 with
It is a branch of testing laser that diode pumping driving circuit 8 closes beam after diode pumping protector 9 enters bundling device 10 jointly, into quilt
It is coupled on optical power detecting circuit 12 after surveying optical fiber 11.
The Active Optical Fiber brightness test circuit for being electrically connected to implement as shown in Figure 8 between designed each circuit module
System diagram carries out.Centered on core control and state detection circuit, seed source driving circuit, level-one pumping driving circuit, two
Grade pumping driving circuit, optical power detecting circuit, condition indication circuit are coupled with the kind of core control and state detection circuit
Component control and state detection interfaces, level-one pumping control and state detection interfaces, diode pumping control and state detection interfaces,
Optical power detecting and temperature sensor interface, condition indication circuit interface；Computer Communications Interface is connected to the survey of Active Optical Fiber brightness
It tries on the computer that circuit system needs.
Fig. 9 is that Active Optical Fiber photon of the present invention darkens test total system schematic diagram, a kind of Active Optical Fiber brightness test electricity
The method of operation of road system is as follows：First, power-on self-test, system detect each pump module location status, constant-current source driving automatically
Circuit state, pumping light power state, and control working state indicating circuit and show self-detection result, if self-test does not pass through,
Computer is not allowed to operate system, self-test allows computer to operate circuit system after passing through；Then pass through meter
The various parameters that user needs, seed source driving current, working frequency, pulsewidth are arranged in calculation machine, and level-one pumps operating current, two level
Pump operating current；Three pumpings are opened successively after setting parameter, are sequentially seed source, level-one pumping, diode pumping, mode
Can open pump switch or key sequence delay turn on pump successively manually；Automatic trigger luminous power circuit power is believed after turn on pump
Number acquisition and is transferred on computer temperature signal collection；Computer receive after power signal and temperature signal to performance number into
Row calculates and carries out temperature compensation, provides correct optical power value；Computer carries out data processing to optical power value and obtains final light
Son is darkened test result and is shown with curve mode and preserved in a document with preset format.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of Active Optical Fiber photon darkens the circuit system of test, it is characterised in that：By core control and state detection circuit,
Working state indicating circuit, seed source driving circuit, level-one pumping driving circuit, diode pumping driving circuit and optical power detecting
Circuit forms；Seed source, the first isolator, level-one pumping, wavelength division multiplexer, the second isolator, diode pumping, diode pumping are protected
It protects device and optical-fiber bundling device composition Active Optical Fiber photon darkens the required light path of test；The optical power detecting circuit is provided with
Source optical fiber photon darkens test data；Entire circuit system is communicated and is controlled by computer, and collecting test data are simultaneously handled
Test result is shown；The core control and state detection circuit are for detecting seed source, level-one pumping and diode pumping
Position, operating current, power output and malfunction；And for controlling seed source, level-one pumping and diode pumping
The function of driving switch, driving current, working frequency and the pulsewidth that works；And the photoelectricity for acquiring optical power detecting circuit
Conversion signal；And for being communicated with computer, communication mode is serial communication, network interface communication, usb communication or wireless communication.
2. Active Optical Fiber photon as described in claim 1 darkens the circuit system of test, it is characterised in that：The working condition
Indicating circuit is used for power supply instruction, seed source, level-one pumping, diode pumping position instruction, operation instruction, indicating fault and circuit
The communication of system and computer indicates, indicating mode be indicator light it is bright, go out, flicker or LCD liquid crystal displays instruction.
3. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the circuit system of test, it is characterised in that：The seed
Source driving circuit is used to adjust the frequency and pulsewidth of the driving current of seed source and the driving current of seed source, wherein driving
Electric current is 0~1A, and drive current adjustment sensitivity is 0.25mA, and frequency is 5~500KHz, and pulsewidth is 5~500ns；Described kind
Component driving circuit includes the constant-temperature circuit being made of PWM temperature control circuits and TEC refrigerators, thermistor, for making tube core work
Make under temperature constant state, short term power stability<± 0.005dB@15min, long-time stability<±0.02dB@8h；The seed
Source driving circuit includes driving current sample resistance, for acquiring driving current and feeding back driving condition；The seed source driving
Circuit is including further including die power detection and amplifying circuit, for feeding back optical output power state；The seed source driving electricity
The interface that road is controlled with core and state detection circuit is connect has position judgment pull-up resistor, by judging that low and high level determines
Whether connect in place.
4. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the circuit system of test, it is characterised in that：The level-one
Pumping driving circuit is used to adjust the driving current of level-one pumping, and wherein 0~1A of drive current range, drive current adjustment is sensitive
Spend 0.25mA；The level-one pumping driving circuit includes the constant temperature being made of PWM temperature control circuits and TEC refrigerators, thermistor
Circuit, for making tube core be operated under temperature constant state, short term power stability<± 0.005dB@15min, long-time stability<±
0.02dB@8h；The level-one pumping driving circuit includes driving current sample resistance, for acquiring driving current and feeding back driving
State；The level-one pumping driving circuit is including further including die power detection and amplifying circuit, for feeding back optical output power
State；The level-one pumping driving circuit is controlled with core and the interface of state detection circuit has position judgment pull-up resistor,
By judging that low and high level determines whether connection in place.
5. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the circuit system of test, it is characterised in that：The two level
Pumping driving circuit is used to adjust the driving current of the diode pumping, wherein 0~10A of drive current range, driving current tune
Save sensitivity 4.6mA；The double-radiation function that the diode pumping driving circuit includes heat sink and fan is air-cooled, power stability<±
0.02dB；The diode pumping driving circuit includes driving current sample resistance, for acquiring driving current and feedback driving shape
State；The diode pumping driving circuit includes die power detection and amplifying circuit, for feeding back optical output power state；It is described
Diode pumping driving circuit includes having position judgment pull-up resistor with the interface of core control and state detection circuit, by sentencing
Broken height low level determines whether connection in place.
6. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the circuit system of test, it is characterised in that：The smooth work(
Rate detection circuit is for realizing photoelectric converting function, enlarging function and temperature compensation function；Power probe receives optical wavelength model
100~20000nm is enclosed, wavelength 1064nm is calibrated, receives power bracket：0~50W, output voltage range：0~10V, the linearity<
± 0.5%, repeatability<1%.
7. Active Optical Fiber photon as claimed in claim 3 darkens the circuit system of test, it is characterised in that：In the seed source
The a length of 1064nm of cardiac wave.
8. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the circuit system of test, it is characterised in that：The level-one
Pumping centre wavelength is 976nm, and the diode pumping centre wavelength is 915nm.
9. Active Optical Fiber photon darkens the method for operation of the circuit system of test, feature as described in any one of claim 1 to 8
It is, first, circuit system powers on detects each pump module location status, constant current source driving circuit state, pump light work(automatically
Rate state, and control working state indicating circuit and show that self-detection result does not allow computer to circuit if self-test does not pass through
System is operated, and self-test allows computer to operate circuit system after passing through；Then it is needed by computer installation user
The various parameters wanted, seed source driving current, working frequency, pulsewidth, level-one pump operating current, diode pumping operating current；
Three pumpings are opened successively after setting parameter, are sequentially seed source, level-one pumping, diode pumping；Automatic trigger light after turn on pump
The acquisition of power circuit power signal, temperature signal collection are simultaneously transferred on computer；Computer receives power signal and temperature letter
Temperature compensation is calculated performance number and carried out after number, provides correct optical power value；Computer carries out at data optical power value
Reason show that final photon is darkened test result and shown with curve mode and preserved in a document with preset format.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107370014A (en) * | 2017-08-23 | 2017-11-21 | 深圳市杰普特光电股份有限公司 | A kind of laser control circuit and laser |
| CN110987368A (en) * | 2019-12-06 | 2020-04-10 | 中国工程物理研究院激光聚变研究中心 | Optical darkening test device and method for ytterbium-doped quartz optical fiber |
| CN111006848B (en) * | 2019-12-06 | 2021-07-20 | 中国工程物理研究院激光聚变研究中心 | Optical darkening testing device and method for ytterbium-doped quartz optical fiber with all-fiber structure |
| CN112161705B (en) * | 2020-09-10 | 2022-08-19 | 无锡锐科光纤激光技术有限责任公司 | Power retest method and system for pulse laser |
| CN112332204B (en) * | 2020-11-03 | 2021-11-16 | 长春理工大学 | All-fiber modular structure pumping source and system for intermediate infrared variable frequency laser |
| CN113281015A (en) * | 2021-06-01 | 2021-08-20 | 江苏亨通光纤科技有限公司 | Rare earth doped optical fiber photodarkening testing device |
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