CN206401705U - A kind of high-power random fiber laser based on load hydrogen optical fiber - Google Patents
A kind of high-power random fiber laser based on load hydrogen optical fiber Download PDFInfo
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- CN206401705U CN206401705U CN201720074081.9U CN201720074081U CN206401705U CN 206401705 U CN206401705 U CN 206401705U CN 201720074081 U CN201720074081 U CN 201720074081U CN 206401705 U CN206401705 U CN 206401705U
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Abstract
The utility model is related to a kind of based on the high-power random fiber laser for carrying hydrogen optical fiber.Passive optical fiber is placed on into long-time mode in high-pressure hydrogen cylinder, to implement to carry hydrogen, allows hydrogen molecule to diffuse in fiber core, then the optical fiber carried after hydrogen is irradiated with Ultra-Violet Laser, increases the Rayleigh scattering of optical fiber.On this basis, stronger accidental distributed feedback can be kept with the optical fiber of short length, while improving the technical bottleneck for going out photo threshold, breaching that only shortening fiber lengths are brought of laser.More power output can be achieved, with advanced and practicality.
Description
Technical field
The invention belongs to Fiber laser technology field, it is related to a kind of based on the high-power random optical-fiber laser for carrying hydrogen optical fiber
Device.
Background technology
Random fiber laser provides accidental distributed feedback using Rayleigh scattering faint in passive optical fiber over long distances, together
The nonlinear effect of stimulated Raman scattering (SRS) provides gain in the passive optical fiber of Shi Liyong, realizes in " resonance free chamber ", " no increasing
Laser output under the conditions of beneficial optical fiber ".Due to providing random feedback using the Rayleigh scattering in Disordered Media, it is not necessary to strict
Cavity resonator structure, random fiber laser have it is simple in construction, without longitudinal mode, high conversion efficiency, smooth spectrum the features such as, be laser
The study hotspot of technical field.The random optical-fiber laser research of early stage is main in face of fields, laser work(such as communication, sensing, imagings
Rate demand is not high, typically within watt level；In recent years, with the lifting of pumpage and continuing to optimize for laser parameter, with
Machine optical fiber laser has been carried out hectowatt grade power output, is expected to turn into a kind of novel high-power optical fiber source.
In the research process of early stage, the length of passive optical fiber is general more than several kilometers in random fiber laser, with
Ensure sufficient distributed Feedback.Theoretical research shows that the passive optical fiber of random fiber laser structure middle and long distance causes high-order
The threshold value of Raman light is relatively low, thus power output reaches after certain level that second order Raman light can quickly produce and cause single order to draw
Graceful luminous power can not be lifted, and this is that random optical fiber laser output power lifts topmost limiting factor at present.Second order Raman light
Generation can also reduce the light light conversion efficiency of laser., can be using shortening fiber lengths to realize that more power is exported
Method, current hectowatt grade above high power random fiber laser is typically all using the passive optical fiber of hundreds of meters of length.But shorten
Fiber lengths can cause accidental distributed feedback to weaken, that improves laser goes out photo threshold without taking other technological means,
Add the difficulty of high-power output.If it is possible to improve the Rayleigh intensity of optical fiber itself while not introducing additional
Loss, then be expected to further shorten fiber lengths and keep the intensity of accidental distributed feedback, so as to improve random optical-fiber laser
The power output of device.
The content of the invention
The purpose of the present invention is to propose to carry the high-power random fiber laser implementation of hydrogen technology based on optical fiber, to enter
One step lifts the power output of random fiber laser.Its basic thought is：Passive optical fiber is placed in high-pressure hydrogen cylinder
Long-time mode allows hydrogen molecule to diffuse in fiber core to implement to carry hydrogen, then irradiates the optical fiber after load hydrogen with Ultra-Violet Laser,
Increase the Rayleigh scattering of optical fiber.On this basis, stronger accidental distributed feedback can be kept with the optical fiber of short length, together
Shi Bingwei improves the technical bottleneck for going out photo threshold, breaching that only shortening fiber lengths are brought of laser.It should be noted that
The load hydrogen process of passive optical fiber is the standard step for preparing fiber grating, highly developed, can be in existing fiber grating
Directly operated in preparation system.
It is a kind of to be included based on the high-power random fiber laser for carrying hydrogen optical fiber：Pumping source and passive optical fiber, wherein pumping
The output end in source is connected with passive optical fiber by the way of welding；The other end sharping of passive optical fiber is to suppress this end face
Feedback, and as the output end of Random Laser, the optical fiber of pumping source output terminal is consistent with passive optical fiber；
Pumping source：Can be that the semiconductor laser or solid of conventional optical fiber laser or fiber coupling swashs
Light device.Laser is exported by fiber coupling, and the diameter of fiber core is consistent with the diameter of passive fiber core described hereinafter, and optical fiber is fine
The numerical aperture of core is consistent with the numerical aperture of passive fiber core described hereinafter, the spy such as centre wavelength, line width, polarization of laser
Property does not have particular/special requirement；Power output is more than 10 watts, to realize random optical-fiber laser high-power output；
Passive optical fiber：Conventional silica-based optical fiber, is made up of fibre core, covering and coat.Pump light and the laser produced
Transmitted in fibre core.Passive optical fiber, which is placed on long-time mode in high-pressure hydrogen cylinder, to implement to carry hydrogen, allows hydrogen molecule to diffuse to
In fiber core, then the optical fiber carried after hydrogen is irradiated with Ultra-Violet Laser, increase the Rayleigh scattering of optical fiber；
The high-power random fiber laser based on load hydrogen optical fiber, may also include wavelength division multiplexer, is arranged on pumping
Between source and passive optical fiber, it is specially：The output end of pumping source and the pumping end of wavelength division multiplexer are subject to by the way of welding
Connection, the common port of wavelength division multiplexer is connected with passive optical fiber by the way of welding；The other end of passive optical fiber is cut tiltedly
Angle is to suppress facet feedback, and as the output end of Random Laser, the signal end of wavelength division multiplexer is also the output of Random Laser
End, optical fiber used in optical fiber, wavelength division multiplexer pumping end, signal end and the common port of pumping source output terminal with passive optical fiber one
Cause.
Compared with conventional art, the present invention, which is breached, only shortens the power ascension technical bottleneck that fiber lengths are introduced, can
Realize that more power is exported, with advanced and practicality.
Brief description of the drawings
Fig. 1 is the structural representation Fig. 1 of the present invention based on the high-power random fiber laser for carrying hydrogen optical fiber,
Fig. 2 is the structural representation Fig. 2 of the present invention based on the high-power random fiber laser for carrying hydrogen optical fiber.
Embodiment
The present invention is further described with reference to diagram.High-power random fiber laser shown in Fig. 1 includes
2 parts such as the passive optical fiber (3) after pumping source (2) and load hydrogen.Wherein the output end of pumping source (2) is adopted with passive optical fiber (3)
Connected with the mode of welding；The other end sharping of passive optical fiber (3) is used as Random Laser to suppress facet feedback
Output end.The optical fiber of pumping source (2) output end is consistent with passive optical fiber (3)." x " represents fusion point in figure, " " represent to cut tiltedly
Angle.
Fig. 2 is another implementation of high-power random fiber laser, and it includes pumping source (2), passive optical fiber (3)
With 3 parts such as wavelength division multiplexer (4).The wherein output end of pumping source (2) and the pumping end of wavelength division multiplexer (4) uses welding
Mode connected, the common port of wavelength division multiplexer (4) is connected with passive optical fiber (3) by the way of welding；Passively
The other end sharping of optical fiber (3) is used as the output end of Random Laser, the letter of wavelength division multiplexer (4) to suppress facet feedback
Number end be also Random Laser output end.The optical fiber, wavelength division multiplexer (4) pumping end, signal end and public affairs of pumping source (2) output end
End optical fiber used is consistent with passive optical fiber (3) altogether." x " represents fusion point in figure, " " represent sharping.
The corresponding specific embodiment of two kinds of structural representations of the invention is given below：
For the high-power random fiber laser shown in Fig. 1, pumping source (2) is ytterbium-doping optical fiber laser, and it, which is exported, swashs
Center wavelength of light is 1070nm, and power output is 1000 watts, and 10dB line widths are 5nm.The output end optical fiber of pumping source (2) is double-contracting
Layer optical fiber, core diameter is 20 μm, and numerical aperture is 0.06；The core diameter of passive optical fiber (3) is 20 μm, and numerical aperture is
0.06, output end cuts 8 degree of oblique angles；First technical research shows that passive optical fiber is carried after hydrogen, and rayleigh scattering coefficient can increase by one
Magnitude, therefore can both ensure the accidental distributed feedback that Rayleigh scattering is provided using 100 meters of passive optical fiber, it can be achieved
1120nm single order Raman light outputs.In view of the Excited state of 1070nm laser to 1120nm laser, under ideal case, laser
Conversion efficiency is up to 95%；The transmission loss of optical fiber is deducted, the random optical-fiber laser output more than 900 watts can be obtained.It is higher than
The maximum power output value of 200 watts of power output this random optical-fiber lasers of open report at present.
For the high-power random fiber laser shown in Fig. 2, pumping source (2) is ytterbium-doping optical fiber laser, and it, which is exported, swashs
Center wavelength of light is 1070nm, and power output is 1000 watts, and 10dB line widths are 5nm.The output end optical fiber of pumping source (2) is double-contracting
Layer optical fiber, core diameter is 10 μm, and numerical aperture is 0.12；After wavelength division multiplexer (4), 1070nm laser is about 950 watts
(loss of general consideration 5% or so), the pumping end operation wavelength of wavelength division multiplexer is 1070nm, and active line is wider than 5nm, is believed
Number end operation wavelength is 1120nm, and active line is wider than 5nm, common port energy simultaneous transmission 1070nm and 1120nm laser；Quilt
The length of dynamic optical fiber (4) is 300 meters, and transmission loss is 0.3dB/ kilometers, and core diameter is 10 μm, and numerical aperture is 0.12, defeated
Go out end and cut 8 degree of oblique angles.First technical research shows that passive optical fiber is carried after hydrogen, and rayleigh scattering coefficient can increase a magnitude, because
This can both ensure the accidental distributed feedback that Rayleigh scattering is provided using 50 meters of passive optical fiber, and 1120nm single orders can be achieved and draw
Graceful light output.In view of the Excited state of 1070nm laser to 1120nm laser, under ideal case, the conversion efficiency of laser is reachable
95%；The transmission loss of optical fiber is deducted, the random optical-fiber laser output more than 900 watts can be obtained.Higher than current open report
200 watts of power output this random optical-fiber lasers maximum power output value.
Claims (2)
1. it is a kind of based on the high-power random fiber laser for carrying hydrogen optical fiber, including：Pumping source and passive optical fiber, its feature exist
In the output end of pumping source is connected with passive optical fiber by the way of welding；The other end sharping of passive optical fiber is to press down
This facet feedback is made, and as the output end of Random Laser, the optical fiber of pumping source output terminal is consistent with passive optical fiber；
The pumping source：Can be that the semiconductor laser or solid of conventional optical fiber laser or fiber coupling swashs
Light device, laser is exported by fiber coupling, and the diameter of fiber core is consistent with the diameter of passive fiber core, the numerical value of fiber core
Aperture is consistent with the numerical aperture of passive fiber core, and the centre wavelength of laser, line width, polarization characteristic do not have particular/special requirement；It is defeated
Go out power more than 10 watts, to realize random optical-fiber laser high-power output；
The passive optical fiber：Conventional silica-based optical fiber, passive optical fiber is placed in high-pressure hydrogen cylinder long-time mode with reality
Load hydrogen is applied, allows hydrogen molecule to diffuse in fiber core, then the optical fiber carried after hydrogen is irradiated with Ultra-Violet Laser, increases the Rayleigh of optical fiber
Scattering.
2. it is according to claim 1 a kind of based on the high-power random fiber laser for carrying hydrogen optical fiber, it is characterised in that institute
State based on the high-power random fiber laser for carrying hydrogen optical fiber, may also include wavelength division multiplexer, be arranged on pumping source and passive light
Between fibre, it is specially：The output end of pumping source and the pumping end of wavelength division multiplexer are connected by the way of welding, and wavelength-division is multiple
It is connected with the common port of device with passive optical fiber by the way of welding；The other end sharping of passive optical fiber is to suppress local terminal
Face is fed back, and as the output end of Random Laser, the signal end of wavelength division multiplexer is also the output end of Random Laser, and pumping source is defeated
The optical fiber gone out used in optical fiber, wavelength division multiplexer pumping end, signal end and the common port at end is consistent with passive optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720074081.9U CN206401705U (en) | 2017-01-19 | 2017-01-19 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720074081.9U CN206401705U (en) | 2017-01-19 | 2017-01-19 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
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| CN206401705U true CN206401705U (en) | 2017-08-11 |
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| CN201720074081.9U Withdrawn - After Issue CN206401705U (en) | 2017-01-19 | 2017-01-19 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848815A (en) * | 2017-01-19 | 2017-06-13 | 中国人民解放军国防科学技术大学 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
| CN111162437A (en) * | 2020-02-17 | 2020-05-15 | 北京工业大学 | Random laser |
-
2017
- 2017-01-19 CN CN201720074081.9U patent/CN206401705U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106848815A (en) * | 2017-01-19 | 2017-06-13 | 中国人民解放军国防科学技术大学 | A kind of high-power random fiber laser based on load hydrogen optical fiber |
| CN106848815B (en) * | 2017-01-19 | 2023-10-13 | 中国人民解放军国防科学技术大学 | High-power random fiber laser based on hydrogen-carrying fiber |
| CN111162437A (en) * | 2020-02-17 | 2020-05-15 | 北京工业大学 | Random laser |
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Granted publication date: 20170811 Effective date of abandoning: 20231013 |
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| AV01 | Patent right actively abandoned |
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