CN106197951A - A kind of Active Optical Fiber photon darkens the Circuits System of test - Google Patents
A kind of Active Optical Fiber photon darkens the Circuits System of test Download PDFInfo
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- CN106197951A CN106197951A CN201610590373.8A CN201610590373A CN106197951A CN 106197951 A CN106197951 A CN 106197951A CN 201610590373 A CN201610590373 A CN 201610590373A CN 106197951 A CN106197951 A CN 106197951A
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- optical fiber
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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
Abstract
The invention discloses a kind of Active Optical Fiber photon and darken the Circuits System of test, this system mainly includes core control and state detection circuit, working state indicating circuit, power, frequency, the pulse laser seed pumping drive circuit of adjustable pulse width, the one-level pumping drive circuit for laser of power adjustable, the diode pumping high power laser drive circuit of power adjustable and power detection circuit.Beneficial effects of the present invention: devise the semiconductor laser device driving circuit that an a kind of control is many, constitute Active Optical Fiber photon and darken a kind of optical fiber laser Circuits System required for test, the seed source power of this optical fiber laser, frequency, adjustable pulse width, one-level pumping and diode pumping power adjustable, it is possible to meet the Active Optical Fiber photon under different parameters is arranged and darken test；And the power test circuit that the system that devises is built-in, it is achieved the integrated testing that Active Optical Fiber photon is darkened by system.
Description
Technical field
The invention belongs to measuring techniques for optical fiber field, darken the electricity of test more particularly, to a kind of Active Optical Fiber photon
Road system.
Background technology
Along with developing rapidly of optical communication technique, optical fiber laser the most gradually grows up, and as optical fiber laser
Main gain media, the stability of active rare earth doped fiber is extremely important, and wherein photon darkens is that one of them is very important
Parameter, it is a kind of induced absorption loss phenomenon that photon darkens effect, can cause the doped fiber permanent increase of sandwich layer background loss,
So test rare earth doped fiber photon darkens and is very important.
Summary of the invention
The technical problem to be solved in the present invention is, darkens effect for active rare earth doped fiber photon, it is provided that a kind of survey
Try Parameter adjustable, working stability, effect can be darkened and show the Circuits System of test result by integrated testing photon.
The present invention solves that above-mentioned technical problem be the technical scheme is that
A kind of Active Optical Fiber photon darkens the Circuits System of test, including core control and state detection circuit, work shape
State indicating circuit, seed source drive circuit, one-level pumping drive circuit, diode pumping drive circuit and optical power detecting electricity
Road.Described core controls and state detection circuit includes central processing unit and peripheral circuit, seed source controls and state-detection connects
Mouth, one-level 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.Described 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, be the core controlling, detect and gather other circuit modules
Heart part；Described seed source control and state detection interfaces, one-level 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 drive circuit, one-level pumping drive circuit, diode pumping drive circuit, optical power detecting circuit, duty
Indicating circuit and the interface of computer.
Described working state indicating circuit includes duty instruction interface and mode indicator part；Described work shape
State indicating device is display lamp or LCD liquid crystal display, and indicating mode is that display lamp is bright, goes out, flashes or LCD liquid crystal display state.
Described seed source drive circuit includes that seed source drives interface, location status circuit, pulse generating circuit, switch electricity
Road, constant current source driving circuit, PWM temperature control circuit, die power detection circuit, seed source tube core, plug-and-play circuit.Described position
Status circuit is made up of pull-up resistor, and core controls and state detection circuit is by judging that low and high level judges inserting of seed source
Pull out state；Described pulse generating circuit can be controlled regulating frequency and pulsewidth, and frequency-tuning range is 5～500KHz, and pulsewidth is adjusted
Adjusting range is 5～500ns；Described on-off circuit is made up of analog switch or relay, controls the driving shape to constant-current source circuit
State；Described constant current source driving circuit produces and drives electric current to drive seed source luminous, and it drives current adjustment, and band sample resistance,
Gather the actual value driving electric current, form closed-loop feedback circuit, it is ensured that driving current constant, judge constant current source driving circuit simultaneously
Duty；This constant-current source drives current adjustment, and current range is 0～1A, electric current regulation sensitivity 0.25mA；Described PWM temperature
Control circuit controls tube core and is operated in temperature constant state, and it controls electricity with TEC semiconductor cooler, critesistor composition closed loop feedback
Road, is effectively ensured the duty of tube core；Described die power detection circuit includes photoelectric switching circuit, amplifying circuit, gathers
Tube core Output optical power size, it is judged that tube core output power stability, forms closed loop control, it is ensured that export stable luminous power,
The duty of tube core can be detected simultaneously；Several duties feedback of seed source drive circuit can well judge seed source
Failure cause, location status judges whether seed source circuit connects, and drives current work feedback of status to judge constant-current source whether work
The faults such as making normal, tube core optical power feedback judges that tube core is the most working properly, the most disconnected fibre of optical fiber, comprehensively its three kinds of states inspections
Survey, permissible investigation basic fault point；The seed resource module that this drive circuit is formed, short term power stability < ± 0.005dB@
15min, long-time stability < ± 0.02dB@8h.
Described one-level pumping drive circuit includes that one-level pumping drives interface, location status circuit, on-off circuit, constant-current source
Drive circuit, PWM temperature control circuit, die power detection circuit, seed source tube core, plug-and-play circuit, its various piece basic
Circuit function is similar with seed source drive circuit.The one-level pump module that this drive circuit is formed, short term power stability < ±
0.005dB@15min, long-time stability < ± 0.02dB@8h.
Described diode pumping drive circuit bag diode pumping drives interface, location status circuit, on-off circuit, radiation air
Fan, high constant-current source drive circuit, die power detection circuit, seed source tube core, plug-and-play circuit.Wherein diode pumping is driven
Mobile interface, location status circuit, on-off circuit, die power detection circuit, plug-and-play circuit basic function drive with seed source
Circuit is similar to.Described high constant-current source drive circuit uses the constant-current source circuit of high-power MOS tube composition or PLD constant current to drive
Galvanic electricity road, drive current range 0～10A；Described radiator fan tube core drive while start, to tube core and tube core heat sink enter
Sector-style is cold；This diode pumping tube core output is relatively big, and heat dissipation capacity is relatively big, uses heat sink passive heat radiation and air-cooled active to dissipate simultaneously
The mode of heat；The diode pumping module that this drive circuit is formed relies primarily on closed loop feedback and software algorithm carries out power stability
Control, power stability < ± 0.02dB.
Described optical power detecting circuit, including luminous power probe, photoelectric switching circuit, signal amplification circuit optical power detecting
Circuit interface and temperature sensor circuit.Described luminous power probe, photoelectric switching circuit, signal amplification circuit are by through tested
The luminous power of optical fiber is converted to the signal of telecommunication, is amplified to the voltage range conveniently processed；Described temperature sensor circuit is detection merit
The actual temperature situation of rate probe segment, and according to variations in temperature, detection of optical power is carried out temperature-compensating；This photodetection electricity
Road module photoelectricity formula is as follows:
Φ=U/Z (1)
Wherein Φ is detection of optical power, and U is for gathering magnitude of voltage, and Z is detector sensitivity, wherein Z temperature influence, so
Temperature-compensating to be 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
Correction temperature, T is actual temperature.
Z in formula (2)0、T0、ZCBeing particular value, T is the value of temperature sensor detection, thus can draw the Z value after temperature compensation；
In formula (1), U is the opto-electronic conversion magnitude of voltage that circuit gathers, formula (2) and formula (1) can get final probe power
Value；This optical power detecting circuit power range of receiving: 0～50W, and the linearity < ± 0.5%, repeatability < 1%.
The operation principle of the present invention: be controlled by computer, sets the pulse laser warp that the seed source of parameter sends
The pump light of the one-level pumping output crossing the first isolator and set driving electric current is after WDM synthesis light beam, through putting in advance
Big active doping optical fibre, the pump light warp respectively being then passed through the second isolator with setting the diode pumping output driving electric current
Crossing signal end and the pumping end of optical-fiber bundling device, after ECDC bundle, the light of output 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 collection returns to
Computer, carries out data process, finally draws brightness test result.
Accompanying drawing explanation
Fig. 1 is the structural representation that core of the present invention controls with state detection circuit；
Fig. 2 is the structural representation of condition indication circuit of the present invention；
Fig. 3 is the structural representation of seed source drive circuit of the present invention；
Fig. 4 is the structural representation of one-level pumping drive circuit of the present invention；
Fig. 5 is the structural representation of diode pumping drive circuit of the present invention；
Fig. 6 is the structural representation 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 of the present invention test Circuits System；
Fig. 9 is the structure chart that Active Optical Fiber photon of the present invention darkens test total system；
In all of the figs, identical reference is used for representing identical element or structure, wherein:
1-seed source drive circuit, 2-the first isolator, 3-one-level pumping drive circuit, 4-one-level pumping protector, 5-
Wavelength division multiplexer, 6-pre-amplification active doping optical fibre, 7-the second isolator, 8-diode pumping drive circuit, 9-diode pumping is protected
Protect device, 10-optical-fiber bundling device, 11-tested optical fiber, 12-optical power detecting circuit.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.If additionally, technical characteristic involved in each embodiment of invention described below
The conflict of not constituting each other just can be mutually combined.
With reference to shown in Fig. 1～Fig. 8, Active Optical Fiber photon of the present invention darkens the Circuits System of test, including core
Control and state detection circuit, working state indicating circuit, seed source drive circuit, one-level pumping drive circuit, diode pumping
Drive circuit, optical power detecting circuit, above circuit is attached according to the joint demand of light path and electrical connection, is 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 detection interface, one-level 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, the direction of arrow
The direction of representation signal, carries out circuit design according to this principle schematic.
Working state indicating circuit shown in Fig. 2 includes duty instruction interface and mode indicator part.Main electricity
Gas sense is pointed to mode indicator part by interface, can be display lamp or LED, and concrete instruction content includes that power supply refers to
Show, seed source, one-level pumping, the position of diode pumping, operation, malfunction, computer and the communications status of system.According to institute
State content and carry out being embodied as of circuit design.
Fig. 3, Fig. 4, Fig. 5 are seed source drive circuit, one-level pumping drive circuit and diode pumping drive circuit respectively
Schematic diagram.The most circuit design of three is similar, identical circuit design part include location status circuit, on-off circuit,
Die power detection circuit, plug-and-play circuit.Location status circuit is made up of pull-up resistor；On-off circuit is by analog switch or continues
Electrical equipment forms；Die power detection circuit is turned potential circuit, filter circuit, signal by photodiode, operational amplifier, electric current
Amplifying circuit forms, and optical signal transfers to current signal, and current signal transfers voltage signal to, filtered, suitably amplifies.Seed source
Pulse-generator circuit in drive circuit is to be gone into by FPGA module programming at a high speed, frequency, adjustable pulse width；Seed source drives
PWM temperature control circuit in circuit and one-level pumping drive circuit, is made up of Temperature Controlling Chip, TEC refrigerator, critesistor；Kind
Constant-current source circuit in component drive circuit and one-level pumping drive circuit is by high speed D/A, operational amplifier, metal-oxide-semiconductor, sampling electricity
Resistance etc. collectively constitutes；High constant-current source drive circuit in diode pumping drive circuit is by high speed D/A, amplifier, high-power MOS
Pipe, sample resistance collectively constitute or are made up of high speed D/A, PLD drive circuit, sample resistance.Concrete circuit design implements root
Electrical connection and above-mentioned details according to Fig. 3,4,5 are carried out.
Fig. 6 is power detection circuit diagram.Comprise luminous power probe, photoelectric switching circuit, signal amplification circuit, light merit
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 be suitable for the signal of telecommunication of collection, and temperature sensor circuit provides temperature survey for optical power detecting circuit, enters
Trip temperature compensates, and circuit design is with reference to Fig. 6.
The each circuit module portion designed is connected in light path system in the way of optical device.Connected mode is according to Fig. 7
Shown Active Optical Fiber brightness optical system for testing system diagram.As seen from the figure, the module related in light path is respectively seed source and drives
Circuit 1, one-level pumping drive circuit 3, diode pumping drive circuit 8 and optical power detecting circuit 12.Concrete implementation is such as
Shown in Fig. 7, seed source drive circuit 1 is through the first isolator 2, and one-level pumping drive circuit 3 is through one-level pumping protector 4 respectively
Synthesize after entering the two 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 drive circuit 8 closes bundle after diode pumping protector 9 enters bundling device 10 jointly, enters quilt
It is coupled to after light-metering fibre 11 on optical power detecting circuit 12.
The Active Optical Fiber brightness test circuit being electrically connected to implement as shown in Figure 8 between each circuit module designed
System diagram is carried out.Centered by core control and state detection circuit, seed source drive circuit, one-level pumping drive circuit, two
Level pumping drive 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, one-level 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 received Active Optical Fiber brightness and is surveyed
On the computer that examination Circuits 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, and system detects each pump module location status automatically, constant-current source drives
Circuit state, pumping light power state, and control working state indicating circuit display self-detection result, if self-inspection is not passed through, then
Not allowing computer to operate system, Circuits System is operated by self-inspection by rear permission computer；Then by meter
Calculation machine arranges the various parameters that user needs, and seed source drives electric current, operating frequency, pulsewidth, one-level pumping operating current, two grades
Pumping operating current；Opening three pumpings after setting parameter successively, order is seed source, one-level pumping, diode pumping, mode
Can be manually to open pump switch or key order time delay turn on pump successively；Automatically luminous power circuit power letter is triggered after turn on pump
Number gather, temperature signal collection being transferred on computer；Performance number is entered after receiving power signal and temperature signal by computer
Row calculates and carries out temperature compensation, provides correct optical power value；Computer carries out data process and draws final light optical power value
Son darkens test result and shows with curve mode and preserve in a document with default form.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention, not in order to
Limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, all should comprise
Within protection scope of the present invention.
Claims (10)
1. an Active Optical Fiber photon darkens the Circuits System of test, it is characterised in that: by core control and state detection circuit,
Working state indicating circuit, seed source drive circuit, one-level pumping drive circuit, diode pumping drive circuit and optical power detecting
Circuit forms；Seed source, the first isolator, one-level pumping, wavelength division multiplexer, the second isolator, diode pumping, diode pumping are protected
Protect device and optical-fiber bundling device composition Active Optical Fiber photon darkens the light path needed for test；Described optical power detecting circuit is provided with
Source optical fiber photon darkens test data；Whole Circuits System is carried out communication and control by computer, and collecting test data also process
Test result shows.
2. Active Optical Fiber photon as claimed in claim 1 darkens the Circuits System of test, it is characterised in that: described core controls
And state detection circuit is for detecting seed source, one-level pumping and the position of diode pumping, operating current, power output and event
Barrier state；And for control seed source, one-level pumping and diode pumping driving switch, drive electric current, operating frequency and
The function of work pulsewidth；And for gathering the photoelectric conversion signal of optical power detecting circuit；And it is used for and compunication,
Communication mode is serial communication, network interface communication, usb communication or radio communication.
3. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the Circuits System of test, it is characterised in that: described work
Condition indication circuit for power supply indicate, seed source, one-level pumping, diode pumping position instruction, run instruction, indicating fault and
The communication instruction of Circuits System and computer, indicating mode be display lamp bright, go out, flash or LCD liquid crystal display indicates.
4. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the Circuits System of test, it is characterised in that: described seed
Source driving circuit is for regulating the driving electric current of seed source, and the frequency driving electric current of seed source and pulsewidth, wherein drives
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 drive circuit includes the constant-temperature circuit being made up of PWM temperature control circuit with TEC refrigerator, critesistor, is used for making tube core work
Make under temperature constant state, short term power stability < ± 0.005dB@15min, long-time stability < ± 0.02dB@8h；Described seed
Source driving circuit includes driving current sampling resistor, is used for gathering driving electric current and feeding back driving condition；Described seed source drives
Circuit includes also including die power detection and amplifying circuit, for feedback light output state；Described seed source drives electricity
The seam that road controls with core and state detection circuit is connected has position judgment pull-up resistor, by judging that low and high level determines
Whether connection puts in place.
5. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the Circuits System of test, it is characterised in that: described one-level
Pumping drive circuit is for regulating the driving electric current of one-level pumping, and wherein drive current range 0～1A, drive current adjustment is sensitive
Degree 0.25mA；Described one-level pumping drive circuit includes the constant temperature being made up of PWM temperature control circuit with TEC refrigerator, critesistor
Circuit, is used for making tube core be operated under temperature constant state, short term power stability < ± 0.005dB@15min, long-time stability < ±
0.02dB@8h；Described one-level pumping drive circuit includes driving current sampling resistor, is used for gathering driving electric current and feeding back driving
State；Described one-level pumping drive circuit includes also including die power detection and amplifying circuit, for feedback light output
State；Described one-level pumping drive circuit controls with core and the seam of state detection circuit has position judgment pull-up resistor,
By judging that low and high level determines whether that connection puts in place.
6. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the Circuits System of test, it is characterised in that: described two grades
Pumping drive circuit is for regulating the driving electric current of described diode pumping, and wherein drive current range 0～10A, driving electric current is adjusted
Joint sensitivity 4.6mA；Described diode pumping drive circuit includes the double-radiation function that heat sink and fan is air-cooled, power stability < ±
0.02dB；Described diode pumping drive circuit includes driving current sampling resistor, is used for gathering driving electric current and feedback drives shape
State；Described diode pumping drive circuit includes die power detection and amplifying circuit, for feedback light output state；Described
Diode pumping drive circuit includes there is position judgment pull-up resistor, by sentencing with the seam of core control and state detection circuit
Broken height low level determines whether that connection puts in place.
7. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the Circuits System of test, it is characterised in that: described smooth merit
Rate detection circuit is used for realizing photoelectric converting function, enlarging function and temperature compensation function；Power probe receives optical wavelength model
Enclose 100～20000nm, calibrate wavelength 1064nm, receive power bracket: 0～50W, output voltage range: 0～10V, the linearity <
± 0.5%, repeatability < 1%.
8. Active Optical Fiber photon as claimed in claim 4 darkens the Circuits System of test, it is characterised in that: in described seed source
The a length of 1064nm of cardiac wave.
9. Active Optical Fiber photon as claimed in claim 1 or 2 darkens the Circuits System of test, it is characterised in that: described one-level
Pumping centre wavelength is 976nm, and described diode pumping centre wavelength is 915nm.
10. as described in any one of claim 1 to 10, Active Optical Fiber photon darkens the method for operation of the Circuits System of test, and it is special
Levying and be, first, Circuits System powers on and automatically detects each pump module location status, constant current source driving circuit state, pump light
Power rating, and control working state indicating circuit display self-detection result, if self-inspection is not passed through, the most do not allow computer to electricity
Road system operates, and Circuits System is operated by self-inspection by rear permission computer；Then by computer installation user
The various parameters needed, seed source drives electric current, operating frequency, pulsewidth, one-level pumping operating current, diode pumping work electricity
Stream；Opening three pumpings after setting parameter successively, order is seed source, one-level pumping, diode pumping；Automatically trigger after turn on pump
Luminous power circuit power signals collecting, temperature signal collection are also transferred on computer；Computer receives power signal and temperature
After signal, performance number calculated and carry out temperature compensation, providing correct optical power value；Computer carries out data to optical power value
Process and show that final photon darkens test result and shows with curve mode and preserve in a document with default form.
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| CN201610590373.8A CN106197951B (en) | 2016-07-25 | 2016-07-25 | A kind of Active Optical Fiber photon darkens the circuit system of test |
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| CN201610590373.8A CN106197951B (en) | 2016-07-25 | 2016-07-25 | A kind of Active Optical Fiber photon darkens the circuit system of test |
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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 |
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| CN111006848A (en) * | 2019-12-06 | 2020-04-14 | 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 |
| CN112161705A (en) * | 2020-09-10 | 2021-01-01 | 无锡锐科光纤激光技术有限责任公司 | Power retest method and system for pulse laser |
| CN112332204A (en) * | 2020-11-03 | 2021-02-05 | 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111006848A (en) * | 2019-12-06 | 2020-04-14 | 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 |
| CN112161705A (en) * | 2020-09-10 | 2021-01-01 | 无锡锐科光纤激光技术有限责任公司 | Power retest method and system for pulse laser |
| CN112332204A (en) * | 2020-11-03 | 2021-02-05 | 长春理工大学 | All-fiber modular structure pumping source and system for intermediate infrared variable frequency 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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