CN109524874A - A kind of method of gain fibre measuring device and the stability for measuring gain fibre output power - Google Patents
A kind of method of gain fibre measuring device and the stability for measuring gain fibre output power Download PDFInfo
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- CN109524874A CN109524874A CN201811647109.9A CN201811647109A CN109524874A CN 109524874 A CN109524874 A CN 109524874A CN 201811647109 A CN201811647109 A CN 201811647109A CN 109524874 A CN109524874 A CN 109524874A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/0014—Monitoring arrangements not otherwise provided for
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
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Abstract
The present invention relates to technical field of optical fiber more particularly to a kind of gain fibre measuring device and the method for the stability for measuring gain fibre output power, the gain fibre measuring devices, comprising: excitation light source, excitation gain fibre generate optical signal；Signal conversion elements receive the optical signal and convert electric signal for the optical signal；Processing unit is controlled, the control processing unit includes: excitation light control unit, receives the optical signal from the excitation light source, stablizes the power output of the excitation light source；Signal conversion elements control unit is analyzed and processed the electric signal after control unit receives the electric signal from the signal conversion elements；Compared with prior art, gain fibre measuring device provided by the present application, keeps the stabilization of output power, avoids in the test of gain fibre, and the distortion of the test result as caused by the power swing of excitation light source keeps the result for testing gain fibre more accurate.
Description
Technical field
This application involves technical field of optical fiber more particularly to a kind of gain fibre measuring device and measurement gain fibre outputs
The method of the stability of power.
Background technique
With the development of fiber optic communication, optical fiber technology can be used to emit various signals.For example, long distance communication, biography
Sensor, medicine and video transmission, may be by optical fiber technology.When optical signal passes through spread fiber, signal is attenuated, and is needed
Signal is regenerated so that signal stabilization transmits.Existing Normal practice, is electrically realized, i.e., optical signal
Become electric signal, the loss signal quality in signal transduction process is solved by amplification electric signal.
There is no uses to convert optical signal into electric signal for gain fibre, but by the pumped optical signal of electromagnetic energy, come
Amplify optical signal.Gain fibre is widely used in optical fiber laser, with the complete upgrading of intelligent Manufacturing Technology in recent years and
Fast development, the technical need of optical fiber laser are also substantially improved therewith, and it is defeated need to have high light beam quality, big stable output power
Characteristic out.A high-power output stability characteristic (quality) technical indicator important as optical fiber laser, need to targetedly build reality
Test device is tested, is tested using certain technical method and means.
Directly the attenuation of monitoring high power fiber laser and amplifier output power at any time is its stabilization of measurement
Performance is the most frequently used, most intuitive means, and this method is although easy to operate, phenomenon is direct, take a long time, a few hectowatts even
Shang kilowatt pump power, in jointed fiber laser and pulse laser, the testing time also needs persistently tens of a few houres, very
To hundreds of hours；Under prolonged test condition, if pump power generates fluctuation, it will cause the distortions of test result.
Apply for content
The embodiment of the present application is by providing a kind of gain fibre measuring device, to solve excitation light source function in the prior art
The technical issues of gain fibre measurement result caused by rate is unstable is distorted.
To solve the above-mentioned problems, the embodiment of the present application provides a kind of gain fibre measuring device, comprising: excitation light source,
The laser light source excitation gain fibre generates optical signal；Signal conversion elements, the signal conversion elements receive the light letter
Number and convert electric signal for the optical signal；Processing unit is controlled, the control processing unit includes: excitation photocontrol list
Member, the excitation light control unit receive the optical signal from the excitation light source, stablize the power output of the excitation light source；
Signal conversion elements control unit, the signal conversion elements control unit receive the electric signal from the signal conversion elements
Afterwards, the electric signal is analyzed and processed.
Preferably, the excitation light source includes: pump laser；Detecting laser, the spy that the detecting laser issues
It surveys light and light is divided into two bundles by optical splitter, wherein light beam inputs the excitation light control unit；Another light beam and the pumping
The pump light that laser issues is converged by the first wavelength division multiplexer, for exciting the gain fibre to generate optical signal.
Preferably, further includes: the second wavelength division multiplexer and Pumping light absorption element of quantity Matching；Second wavelength-division is multiple
It is divided with the optical signal that device is used to generate the gain fibre；The Pumping light absorption element is for absorbing the light letter
Remaining pump light in number；Correspondingly, the signal conversion elements are used to receive the detection light in the optical signal.
Preferably, the inside of the Pumping light absorption element is polished using frosting technology.
Preferably, further includes: mould field adapter, for matching with the port of the gain fibre.
Preferably, the quantity of the mould field adapter be two, the output port of two mould field adapters respectively with
The port at the gain fibre both ends matches.
Preferably, in the optical splitter, second wavelength division multiplexer and the mould field adapter, at least one device
With optic fibre input end mouth and optical fiber output port.
Preferably, further includes: cooling device, for cooling down the gain fibre；Correspondingly, the control processing unit is also
It include: cooling device control unit, for adjusting the cooling device.
The embodiment of the present application also provides a kind of method of stability for measuring gain fibre output power, comprising: to detection
Light light splitting separates the total two-beam very of optical signal ratio；Detection light excites gain light with after pump light at high proportion for mixing
Fibre measures the output power of the gain fibre；Wherein, during measuring the output power of gain fibre, according to low ratio
The variation of example detection light, the output power of control detection light make the output power of the detection light keep stablizing.
Preferably, the wavelength of the detection light is 500-530nm, and the wavelength of the pump light is
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects
Fruit:
(1) the embodiment of the present application is by providing a kind of gain fibre measuring device, comprising: excitation light source, the laser light
Source excitation gain fibre generates optical signal；Signal conversion elements, the signal conversion elements receive the optical signal and will be described
Optical signal is converted into electric signal；Processing unit is controlled, the control processing unit includes: excitation light control unit, the excitation
Light control unit receives the optical signal from the excitation light source, stablizes the power output of the excitation light source；Signal conversion member
Part control unit, after the signal conversion elements control unit receives the electric signal from the signal conversion elements, to described
Electric signal is analyzed and processed.For solving gain fibre measurement result caused by excitation light source power is unstable in the prior art
The technical issues of being distorted.
The optical signal that excitation light source is received by using excitation light control unit, by detecting whether optical signal occurs wave
It is dynamic, to judge whether the output power of excitation light source fluctuates, so as to adjust the output power of excitation light source, keep output work
The stabilization of rate avoids in the test of gain fibre, and the distortion of the test result as caused by the power swing of excitation light source makes
The result for testing gain fibre is more accurate.
(2) pump laser, detecting laser respectively with the first wavelength division multiplexer welding, the first wavelength division multiplexer and mould field
Adapter welding, the welding of mould field adapter and gain fibre, the welding of mould field adapter and the second wavelength division multiplexer, the second wave
The tail optical fiber of welding between division multiplexer, above-mentioned mutual welding uses same diameter optical fiber, is easily carried out by welding low
Welding is lost, positive insertion loss is less thanCore packet diameter, the fibre core of the optical fiber output port of mould field adapter
Numerical aperture, the core packet diameter of covering numerical aperture and gain fibre to be measured, fibre core numerical aperture, covering numerical aperture complete
Match, can be effectively reduced the splice loss, splice attenuation of different core diameters, improves the signal-to-noise ratio of test result.
Above description is only the general introduction of technical scheme, in order to better understand the technological means of the application,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the application can
It is clearer and more comprehensible, below the special specific embodiment for lifting the application.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of first embodiment of the invention gain fibre measuring device；
Fig. 2 is the structural schematic diagram of second embodiment of the invention gain fibre measuring device；
Fig. 3 is to be tested using gain fibre measuring device of the embodiment of the present inventionThe survey of gain fibre
Test result schematic diagram；
Fig. 4 is to be tested using gain fibre measuring device of the embodiment of the present inventionThe survey of gain fibre
Test result schematic diagram；
Fig. 5 is the flow chart for the stability that third embodiment of the invention measures gain fibre output power.
Specific embodiment
Technical scheme is described in detail below by attached drawing and specific embodiment, it should be understood that the application
Specific features in embodiment and embodiment are the detailed description to technical scheme, rather than to present techniques
The restriction of scheme, in the absence of conflict, the technical characteristic in the embodiment of the present application and embodiment can be combined with each other.
Fig. 1 is the structural schematic diagram for the gain fibre measuring device that first embodiment of the invention provides.As shown in Figure 1, institute
State gain fibre measuring device, comprising:
Excitation light source 100, the laser light source 100 excite gain fibre to generate optical signal.Wherein, excitation light source 100 can
To use pump laser, semiconductor laser.
When using pump laser, mode pump laser device can be specifically used, as operation wavelength isSingle-mode output, output power long-time stabilityLess than 1%, ensure that it is uniform,
Population inversion it is horizontal, pump light transmits in the fibre core of optical fiber, is not necessarily to cladding light device for stripping, this not only reduces members
Device, and substantially increase testing efficiency.When using semiconductor probe laser, can specifically it useThe green light of wavelength, the output power short-term stability of green lightIt is less than
0.1%, output power long-time stabilityLess than 0.2%, to ensure that the high stability of detection light.
Signal conversion elements 200, the signal conversion elements 200 receive the optical signal and convert the optical signal to
Electric signal.
Wherein, signal conversion elements 200 are light power meter, it is preferred that the light power meter includes display gauge head and photoelectricity
Probe.Photodetection face diameter isFor receiving the optical signal and being converted into electric signal.Display gauge head passes through
Electric signal is passed in control processing unit 300 by data line in real time, carries out data analysis and process by control processing unit 300.
Processing unit 300 is controlled, the control processing unit 300 includes:
Light control unit 310 is excited, the excitation light control unit 310 receives the light letter from the excitation light source 100
Number, stablize the power output of the excitation light source 100；
Signal conversion elements control unit 320, the signal conversion elements control unit 320 is received to be turned from the signal
After the electric signal for changing element 200, the electric signal is analyzed and processed.
The embodiment of the present application receives the optical signal of excitation light source by using excitation light control unit, by detecting optical signal
Whether fluctuate, to judge whether the output power of excitation light source fluctuates, so as to adjust the output power of excitation light source,
The stabilization for keeping output power, avoids in the test of gain fibre, is tested as caused by the power swing of excitation light source
As a result it is distorted, keeps the result for testing gain fibre more accurate.
Fig. 2 is the structural schematic diagram for the gain fibre measuring device that second embodiment of the invention provides.As shown in Fig. 2, institute
Stating excitation light source 100 includes: pump laser 110；
Detecting laser 120, the detection light that the detecting laser 120 issues are divided into two bundles light by optical splitter 130,
Middle light beam inputs the excitation light control unit 310；The pump light that another light beam is issued with the pump laser 110 passes through
First wavelength division multiplexer 140 converges, for exciting the gain fibre to generate optical signal.
In the embodiment of the present application, detecting laser 120 can select semiconductor laser, as selection is provided asThe green light of wavelength, output power short-term stabilityLess than 0.1%, output
Power long-time stabilityLess than 0.2%, to guarantee the high stability of detection light.Semiconductor laser is passed through
The input tail optical fiber phase welding of optical fiber and optical splitter 130.The output tail optical fiber of optical splitter 130 passes through optical fiber and the first wavelength division multiplexer
End of probe phase welding, the end of probe of the wavelength division multiplexer pass through first wave also with the output tail optical fiber of pump laser to welding
Division multiplexer 140 converges the detection light after light splitting with pump light, using the welding mode of optical fiber, realizes fibre core pumping, pump
Pu light transmits in fibre core, is not necessarily to cladding light device for stripping, and this not only reduces components, and substantially increases test effect
Rate.
Wherein, optical splitter 130 is divided into two-way light for light is detected according to certain light splitting ratio.For example, using 99:1 (light splitting
Percentage) light splitting ratio by detect light be divided into two-way light, later, using 1% detection light as feed back directly input excitation
Light control unit 310, exciting light of the 99% detection light and pump light multiplex at light beam as excitation gain fibre in addition.
It should be noted that control can be compared with 1% or so for the detection light ratio for input excitation light control unit 310
The output power of detection light is stablized in good realization, 1% or so detection light as feedback signal input control processing unit 300,
Detecting laser 120 can be adjusted in real time controls electric current to enhance the light power stabilising output of probe source, without in light splitting
The light splitting ratio of input excitation light control unit is improved on a large scale.For the usual accounting of detection light ratio with pump light multiplex
It is larger, to improve the stability of the exciting light after multiplex.
In order to adapt to carry out the test of performance to the gain fibre of different size, the gain fibre measuring device is also wrapped
It includes: mould field adapter, for matching with the port of the gain fibre.Preferably, the quantity of the mould field adapter is two
A, port of the output port of two mould field adapters respectively with the gain fibre both ends matches.
Specifically, the first wavelength division multiplexer 140 can be connect with gain fibre by mould field adapter 150, mould field adaptation
Device 150 input tail optical fiber and the first wavelength division multiplexer 140 output tail optical fiber phase welding, the output tail optical fiber of mould field adapter 150 and
The phase welding of gain fibre one end, the output tail optical fiber phase welding of the other end of gain fibre and another mould field adapter 150.Pass through
Core packet diameter and the gain fibre of the output optical fibre of mould field adapter 150 match, and thus greatly reduce because of core packet diameter not
With bring coupling loss, the signal-to-noise ratio of test effect is improved, while it is steady to meet different size gain fibre output power
Qualitative test request.
Preferably, the gain fibre measuring device further include: the second wavelength division multiplexer 210 and pump light of quantity Matching
Absorber element 220；The optical signal that second wavelength division multiplexer 210 is used to generate the gain fibre is divided；It is described
Pumping light absorption element 220 is for absorbing remaining pump light in the optical signal；Correspondingly, the signal conversion elements 200
For receiving the detection light in the optical signal.
In the embodiment of the present application, the second wavelength division multiplexer 210 and Pumping light absorption element 220 are arranged at gain fibre
Output end, when using mould field adapter 150 connect gain fibre both ends when, the output of second wavelength division multiplexer 210
The input tail optical fiber phase welding of tail optical fiber and mould field adapter 150.
In above-mentioned optical splitter 130, the first wavelength division multiplexer 140, the second wavelength division multiplexer 210 and mould field adapter 150
In, at least one device has optic fibre input end mouth and optical fiber output port.Preferably, above-mentioned apparatus all has optic fibre input end
Mouth and optical fiber output port, realize all-fiber structure, improve to the gain fibre continuous-stable testing time, have anti-dry
Disturb the strong beneficial effect of ability.
Further, the optic fibre input end mouth of optical splitter 130, the first wavelength division multiplexer 140, the second wavelength division multiplexer 210
Same diameter is used with optical fiber output port, such asDiameter optical fiber is easily carried out low damage by welding
Consume welding；The core packet diameter of the optical fiber output port of mould field adapter 150, fibre core numerical aperture, covering numerical aperture with it is to be measured
The core packet diameter of gain fibre, fibre core numerical aperture, the exact matching of covering numerical aperture, can be effectively reduced the molten of different core diameters
Loss is connect, the signal-to-noise ratio of test result is improved.
Wherein, the Pumping light absorption element 220 can be to absorb block, for absorbing the remnants' after gain fibre
Pump light.The quantity for absorbing block and the second wavelength division multiplexer 210 matches, specifically, the second wavelength division multiplexer 210 will be by increasing
Remaining pump light and detection light are separated in the exciting light of beneficial optical fiber, remnant pump light therein is absorbed block absorption, detects light
Received by signal conversion elements 200.
When absorbing remaining pump light, the pumping end of the second wavelength division multiplexer 210 and Pumping light absorption element 220 connect
It connects, for absorbing the pump light not absorbed in gain fibre fibre core；The end of probe of second wavelength division multiplexer 210 can also with it is another
The pumping end of one 210 welding of the second wavelength division multiplexer, the latter wavelength division multiplexer 210 reconnects a Pumping light absorption element
220, as Pumping light absorption element 220 passes through the pumping end light that naked fibre adapter connector fixes the second wavelength division multiplexer 210 respectively
Fibre, after a small amount of remnant pump light is absorbed by Pumping light absorption element 220, then in the end of probe of the latter wavelength division multiplexer 210
Upper connection signal conversion elements 200；Specifically, signal conversion elements 200 have FC connector, for connecting the second wavelength-division of the latter
The end of probe optical fiber of multiplexer 210 converts electric signal for the optical signal detected and is real-time transmitted in control processing unit 300
Carry out data collection and analysis.
Preferably, the first wavelength division multiplexer 140, the second wavelength division multiplexer 210 are (1+1) × 1 type, and operation wavelength isTwo waveband.
Preferably, the inside for absorbing block is polished using frosting technology, increases internal surface area, utilizes the unrestrained anti-of surface
It penetrates, enhances the absorbability to remaining pump light.
Preferably, the gain fibre measuring device further include: cooling device 400, for cooling down the gain fibre；Phase
It answers, the control processing unit further include: cooling device control unit 330, for adjusting the cooling device.
Specifically, gain fibre is placed in cooling device 400, cooling device 400 in recirculated water band walking apparatus by producing
Raw heat keeps the stabilization of test environment temperature.
Now respectively withGain fibre,Gain fibre and to gain light
The use step of fine measuring device is described as follows:
WithIt, will be to be measured with optical fiber splicer for gain fibreGain
Between two mould field adapters 150, the output tail optical fiber of mould field adapter 150 is fused fiber spliceIt is passive
Optical fiber is matched, in the operation interface of control processing unit 300, successively opens pump laser 110, detecting laser 120, cold
But device 400, signal conversion elements 200；110 output power of pump laser is set, 120 output power of detecting laser, is surveyed
Try time, acquisition time interval, store path etc..Collected test data is as shown in the figure.Fig. 3 is under different technology conditions
4 20/400 gain fibre sample output powers change over time situation, by the result of Fig. 3 it is found that No. 4 gain fibre performances most
Difference, No. 3 gain fibre performances are best.
WithIt, will be to be measured with optical fiber splicer for gain fibreGain light
Between two mould field adapters 150, the output tail optical fiber of mould field adapter 150 is for fine weldingPassive
With optical fiber, in the operation interface of control processing unit 300, pump laser 110, detecting laser 120, cooling are successively opened
Device 400, signal conversion elements 200；110 output power of pump laser, 120 output power of detecting laser, test are set
Time, acquisition time interval, store path etc..Collected test data is as shown in the figure.Fig. 4 is 4 under different technology conditions
RootGain fibre sample output power changes over time situation, by the result of Fig. 4 it is found that No. 4 gain light
Fine performance is worst, and No. 3 gain fibre performances are best.
A kind of gain fibre measuring device provided by the embodiments of the present application at least has following one or more technology effects
Fruit:
(1) optical signal that excitation light source is received using excitation light control unit, by detecting whether optical signal fluctuates,
Judge whether the output power of excitation light source fluctuates, so as to adjust the output power of excitation light source, keeps output power
Stabilization, avoid in the test of gain fibre, the test result as caused by the power swing of excitation light source distortion, make to survey
The result for trying gain fibre is more accurate.
(2) pump laser, detecting laser respectively with the first wavelength division multiplexer welding, the first wavelength division multiplexer and mould field
Adapter welding, the welding of mould field adapter and gain fibre, the welding of mould field adapter and the second wavelength division multiplexer, the second wave
The tail optical fiber of welding between division multiplexer, above-mentioned mutual welding uses same diameter optical fiber, is easily carried out by welding low
Welding is lost, positive insertion loss is less thanCore packet diameter, the fibre core of the optical fiber output port of mould field adapter
Numerical aperture, the core packet diameter of covering numerical aperture and gain fibre to be measured, fibre core numerical aperture, covering numerical aperture complete
Match, can be effectively reduced the splice loss, splice attenuation of different core diameters, improves the signal-to-noise ratio of test result.
Fig. 5 is a kind of flow chart of the stability for measurement gain fibre output power that third embodiment of the invention provides.
The method is to come using the gain fibre measuring device provided in the application first embodiment to gain fibre output power
Stability measures, and content relevant to gain fibre measuring device is referred to first embodiment disclosure, below
Only the brief method to measurement gain fibre output power is illustrated.
As shown in Figure 5, which comprises
S100: to detection light light splitting, the total two-beam very of optical signal ratio is separated.
Specifically, being divided into two-way light for light is detected according to certain light splitting ratio using optical splitter.For example, using 99:1
The light splitting ratio of (light splitting percentage) is divided into two-way light for light is detected.
S200: detection light excites gain fibre, measures the output work of the gain fibre with after pump light at high proportion for mixing
Rate；Wherein, during measuring the output power of gain fibre, the variation of light is detected according to low ratio, control detection light
Output power makes the output power of the detection light keep stablizing.
Specifically, when light will be detected according to the light splitting ratio point by 1% detection light according to 99:1 (light splitting percentage)
After two-way light；Using 1% low ratio detection light as feedback, by the detection light of 1% ratio in the mistake for measuring gain fibre
Changed power in journey, the output power of control detection light, makes the output power for detecting light keep stablizing, to make other
99% detection light and pump light multiplex keeps stablizing at light beam as the output power of the exciting light of excitation gain fibre.It is logical
The output power for crossing stable exciting light avoids in the test of gain fibre, as caused by the power swing of excitation light source
Test result distortion keeps the result for testing gain fibre more accurate.
Preferably, the wavelength of the detection light is 500-530nm, and the wavelength of the pump light is
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of gain fibre measuring device characterized by comprising
Excitation light source, the laser light source excitation gain fibre generate optical signal；
Signal conversion elements, the signal conversion elements receive the optical signal and convert electric signal for the optical signal；
Processing unit is controlled, the control processing unit includes:
Light control unit is excited, the excitation light control unit receives the optical signal from the excitation light source, stablizes described sharp
The power output of light emitting source；
Signal conversion elements control unit, the signal conversion elements control unit receive the electricity from the signal conversion elements
After signal, the electric signal is analyzed and processed.
2. gain fibre measuring device according to claim 1, which is characterized in that the excitation light source includes:
Pump laser；
Detecting laser, the detection light that the detecting laser issues are divided into two bundles light by optical splitter, and wherein light beam inputs
The excitation light control unit；The pump light that another light beam and the pump laser issue is converged by the first wavelength division multiplexer
It closes, for exciting the gain fibre to generate optical signal.
3. gain fibre measuring device according to claim 2, which is characterized in that further include: the second wave of quantity Matching
Division multiplexer and Pumping light absorption element；
The optical signal that second wavelength division multiplexer is used to generate the gain fibre is divided；
The Pumping light absorption element is for absorbing remaining pump light in the optical signal；
Correspondingly, the signal conversion elements are used to receive the detection light in the optical signal.
4. gain fibre measuring device according to claim 3, which is characterized in that the inside of the Pumping light absorption element
It is polished using frosting technology.
5. gain fibre measuring device according to claim 3, which is characterized in that further include: mould field adapter, for
The port of the gain fibre matches.
6. gain fibre measuring device according to claim 5, which is characterized in that the quantity of the mould field adapter is two
A, port of the output port of two mould field adapters respectively with the gain fibre both ends matches.
7. gain fibre measuring device according to claim 5, which is characterized in that the optical splitter, second wavelength-division
In multiplexer and the mould field adapter, at least one device has optic fibre input end mouth and optical fiber output port.
8. gain fibre measuring device described in -7 any one according to claim 1, which is characterized in that further include: cooling dress
It sets, for cooling down the gain fibre；
Correspondingly, the control processing unit further include: cooling device control unit, for adjusting the cooling device.
9. a kind of method for the stability for measuring gain fibre output power characterized by comprising
To detection light light splitting, the total two-beam very of optical signal ratio is separated；
Detection light excites gain fibre, measures the output power of the gain fibre with after pump light at high proportion for mixing；
Wherein, during measuring the output power of gain fibre, the variation of light is detected according to low ratio, control detection light
Output power makes the output power of the detection light keep stablizing.
10. the method for the stability of measurement gain fibre output power according to claim 9, which is characterized in that described
The wavelength for detecting light is 500-530nm, and the wavelength of the pump light is
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112763184A (en) * | 2020-12-23 | 2021-05-07 | 中国人民解放军国防科技大学 | Gain optical fiber absorption coefficient measuring device and method based on side scattering light detection |
| 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 |
| CN114813824A (en) * | 2022-03-19 | 2022-07-29 | 苏州创鑫激光科技有限公司 | Device and method for testing thermal conductivity of gain optical fiber glue-pouring package |
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| CN114813824A (en) * | 2022-03-19 | 2022-07-29 | 苏州创鑫激光科技有限公司 | Device and method for testing thermal conductivity of gain optical fiber glue-pouring package |
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