CN206850214U - A kind of high-capacity optical fiber laser light path based on ASE filtering techniques - Google Patents
A kind of high-capacity optical fiber laser light path based on ASE filtering techniques Download PDFInfo
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- CN206850214U CN206850214U CN201720521367.7U CN201720521367U CN206850214U CN 206850214 U CN206850214 U CN 206850214U CN 201720521367 U CN201720521367 U CN 201720521367U CN 206850214 U CN206850214 U CN 206850214U
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- optical fiber
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- gain fibre
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Abstract
The utility model belongs to laser field, more particularly to a kind of high-capacity optical fiber laser light path based on ASE filtering techniques, including all -fiber arrowband ASE seeds source light path, narrow band filter, one-level amplifying circuit and the second amplifying circuit being linked in sequence, one-level amplifying circuit is forward pumping fibre core structure for amplifying, second amplifying circuit is forward pumping double clad structure for amplifying, and the second circulator is provided between one-level amplifying circuit and second amplifying circuit.High-capacity optical fiber laser light path of the present utility model based on ASE filtering techniques, both suitable grating bandwidth and polarization characteristic can be selected according to the actual requirements, and the laser output of high power, high stability can also be realized using the fiber amplifier amplifying technique of maturation.
Description
Technical field
The utility model belongs to laser field, and in particular to a kind of high-capacity optical fiber laser based on ASE filtering techniques
Light path.
Background technology
Optical fiber laser has the advantages that high conversion efficiency, good beam quality, compact-sized, easy to maintenance, is ground in science
Study carefully, the field such as industrial processes, national defense and military is with a wide range of applications.Superfluorescence (spontaneous radiation of amplification, ASE light sources tool
There is the features such as spectral coverage is wide, temporal coherence is low, temperature stability is good, in optical tomography OCT, high-precision optical fiber
Gyro sensing, single photon generation etc. have extensive use.In addition, superfluorescence is compared with laser, also have without relaxation oscillation,
The outstanding features such as non-mode competition, high time-domain stability.
Gain 1um fiber amplifiers (YDFA) based on master oscillation power amplification (MOPA) structure have output laser beam
Quality is good, efficiency high, be easy to radiating, it is compact-sized, reliability is high and is easily achieved high-power output the features such as be widely used,
Superfluorescence source based on YDFA is in Materialbearbeitung mit Laserlicht, remote sensing, low-coherence measuring, optical coherence imaging, spectrum beam combination etc.
With very important application.Meanwhile arrowband superfluorescence source is without longitudinal mode, and photon is uniformly distributed in spectral region, therefore
There are very big potentiality in terms of stimulated Brillouin scattering SBS is suppressed.High power Raman fiber lasers and amplifier have fine
Wavelength spread and high brightness, and high power superfluorescence source can be used as its preferable pumping source.Thus it is based on gain fibre
High-power superfluorescent fiber sources SBS is built, the technical scheme as new higher source luminance is expected to, there is very high application
Value.
At present, the scheme of 10W 1064nm lasers has following several：1. straight cavity structure:Reflective grid+the multimode of double-contracting floor height
The low reflective grid of pump combiner+CPS+ double clads+high power isolator advantage：It is simple in construction, easily realize high-power output；Lack
Point：Output laser broader bandwidth, generally several nm, the bandwidth of double clad grating is primarily limited to, and double clad grating is general
Import is needed, it is expensive.2. semiconductor laser+two-stage YDFA advantages：Line width<1nm, high-power output can be realized；Lack
Point：The line width and polarization characteristic of output laser are a fixed value, are primarily limited to the characteristic of seed source.3. the light of straight cavity structure
Fibre laser+two-stage YDFA advantages：Suitable grating bandwidth and polarization characteristic, stability can be selected according to the actual requirements
It can be made high,<1%；Shortcoming：High-power output can not be realized, peak power reaches 3W at present, two from oscillograph
, there is strong relaxation oscillation peak (as shown in Figure 1) in the light echo of level amplification light path, is easily damaged one-level amplification light path.
Therefore for technical problem present in prior art, it is necessary to be studied in fact, can be according to reality to provide one kind
Border demand selects suitable grating bandwidth and polarization characteristic, ripe YDFA amplifying techniques can also be utilized realize high power,
The laser output light path of high stability.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of high-capacity optical fiber laser based on ASE filtering techniques
Light path, there is the characteristics of simple in construction and stable performance.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：
High-capacity optical fiber laser light path of the present utility model based on ASE filtering techniques, including the full light being linked in sequence
Fine arrowband ASE seeds source light path, narrow band filter, one-level amplifying circuit and second amplifying circuit, one-level amplifying circuit are forward direction
Pumping fibre core structure for amplifying, second amplifying circuit are forward pumping double clad structure for amplifying, one-level amplifying circuit and two level amplification
The second circulator is provided between circuit.
Preferably, all -fiber arrowband ASE seeds source light path includes faraday rotation mirror, the first wavelength division multiplexer, the first increasing
Beneficial optical fiber, the first isolator and the first pump light source, draw revolving mirror, the first wavelength division multiplexer, the first gain fibre and first
Isolator is linked in sequence, and the first pump light source is coupled into the first gain fibre by the first wavelength division multiplexer.
Preferably, one-level amplifying circuit include the second isolator, the second wavelength division multiplexer, the second gain fibre, the 3rd every
From device and the second pump light source, the second isolator, the second wavelength division multiplexer, the second gain fibre and the 3rd isolator order connect
Connect, the second pump light source is coupled into the second gain fibre by the second wavelength division multiplexer, and the 3rd isolator and the second circulator connect
Connect.
Preferably, second amplifying circuit include two the 3rd pump light sources, multimode pump combiner, the 3rd gain fibre,
Cladding pumping stripper and the 4th isolator, multimode pump combiner, the 3rd gain fibre, cladding pumping stripper and the 4th every
It is linked in sequence from device, two the 3rd pump light sources are injected into the 3rd gain fibre by the multimode pump combiner of (2+1) × 1, more
Mould pump combiner is connected with the second circulator CIR2.
Preferably, narrow band filter is connected and composed by first annular device and Fiber Bragg Grating FBG.
Preferably, the first pump light source and the second pump light source are single-mode laser, and the 3rd pump light source is that 980nm is more
Mode laser.
Preferably, the first wavelength division multiplexer and the second wavelength division multiplexer are 980/1064nm wavelength division multiplexers.
Preferably, the reflectivity of Fiber Bragg Grating FBG>99%, operation wavelength 1064.21nm.
Preferably, the first gain fibre is single-mode fiber, and the second gain fibre is SM-YSF-HI optical fiber.
Preferably, the 3rd gain fibre is 10/125 optical fiber.
There is following beneficial effect using the utility model：High power of the present utility model based on ASE filtering techniques
Optical fiber laser light path, suitable grating bandwidth and polarization characteristic can be both selected according to the actual requirements, can also utilize maturation
Fiber amplifier amplifying technique come realize high power, high stability laser output.
Brief description of the drawings
The return light schematic diagram for the oscillograph observation that Fig. 1 is optical fiber laser+two-stage YDFA of straight cavity structure；
Fig. 2 is all -fiber arrowband ASE seed source light channel structure schematic diagrams of the utility model embodiment；
Fig. 3 is that the one-level of the utility model embodiment amplifies YDFA circuits and two level amplifies the structural principle of YDFA circuits
Figure；
Fig. 4 is the return light schematic diagram that the oscillograph of the utility model embodiment is observed；
Fig. 5 is the spectrogram of the actual measurement ASE seed sources of the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is the utility model part of the embodiment, rather than whole implementation
Example.Based on the embodiment in the utility model, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment obtained, belong to the scope of the utility model protection.
As shown in Figures 2 and 3, the high-capacity optical fiber laser light path of the present utility model based on ASE filtering techniques, including
All -fiber arrowband ASE seeds source light path, narrow band filter, one-level amplification YDFA circuits and the two level amplification YDFA being linked in sequence
Circuit, one-level amplification YDFA circuits are forward pumping fibre core structure for amplifying, and two level amplification YDFA circuits are forward pumping double clad
Structure for amplifying, the second circulator CIR2 is provided between one-level amplification YDFA circuits and two level amplification YDFA circuits.
As shown in Fig. 2 all -fiber arrowband ASE seeds source light path includes faraday rotation mirror FRM, the first wavelength division multiplexer
WDM1, the first gain fibre YSF1, the first isolator ISO1 and the first pump light source Pump1, draw revolving mirror FRM, first wave
Division multiplexer WDM1, the first gain fibre YSF1 and the first isolator ISO1 are linked in sequence, and the first pump light source Pump1 is
980nm single-mode lasers, its power are 600mW, and the first gain fibre YSF1 is coupled into simultaneously by the first wavelength division multiplexer WDM1
Into the first isolator ISO1, tail optical fiber is cut into 8 ° of oblique angle AC, plays and effectively suppresses laser caused by straight angle formation vibration.Work as pumping
During the Pump1 power 600mW of source, output wide range ASE power is 100mW, and full width at half maximum (FWHM) FWHM is 40nm.Pass through faraday rotation mirror
FRM+ forward direction fibre core pumping Yb dosed optical fibers, the ASE of wide range is exported, first annular device CIR1 and light are then met behind wide range ASE
Fine bragg grating FBG, first annular device CIR1 form a narrow band filter with optical fiber bragg grating FBG, can be by broadband
Spontaneous radiation spectrum filter for arrowband spontaneous radiation spectrum.ASE bandwidth is narrowed by 40nm by narrow band filter
100pm, exports 1mW seed source power after first annular device CIR1, and measured light spectrogram is as shown in Figure 5.Wherein optical fiber Bradley
Lattice grating FBG is high reflective grid, and wavelength and bandwidth are optional, and FBG reflectivity is selected in this patent>99%, operation wavelength is
1064.21nm three dB bandwidth 100pm.The YSF1 optical fiber used in the structure be Nufern companies single-mode fiber, optical fiber cloth
Glug grating is arranged on the aluminum heat dissipation plate of customization, to prevent mechanical oscillation and variation of ambient temperature from being interfered to it.The
One gain fibre YSF1 is Nufern companies single-mode fiber.
As shown in figure 3, one-level amplification YDFA circuits include the second isolator ISO2, the second wavelength division multiplexer WDM2, second
Gain fibre YSF2, the 3rd isolator ISO3 and the second pump light source Pump2, the second isolator ISO2, the second wavelength division multiplexer
WDM2, the second gain fibre YSF2 and the 3rd isolator ISO3 are linked in sequence, and the second pump light source Pump2 passes through the second wavelength-division
Multiplexer WDM2 is coupled into the second gain fibre YSF2, and the 3rd isolator ISO3 is connected with the second circulator CIR2.Second gain
Optical fiber YSF2 is the SM-YSF-HI optical fiber of Nufern companies.In one-level amplification YDFA circuits, 980nm mode pump light sources pass through
The second gain fibre YSF2 is coupled into after second wavelength division multiplexer WDM2, is carried out under seed ASE excitation through gain fibre
Amplification.When the second pump light source Pump2 power is 650mW, power output 100mW.
As shown in figure 3, two level amplification YDFA circuits include two the 3rd pump light source Pump3, multimode pump combiners
COM, the 3rd gain fibre YDF, cladding pumping stripper CPS and the 4th isolator ISO4, multimode pump combiner COM, the 3rd
Gain fibre YDF, cladding pumping stripper CPS and the 4th isolator ISO4 are linked in sequence, and two the 3rd pump light source Pump3 lead to
Cross the multimode pump combiner COM of 2+1 × 1 and be injected into the 3rd gain fibre YDF, multimode pump combiner COM and the second circulator
CIR2 connections.Two the 3rd pump light source Pump3 are injected into the 3rd gain fibre by the multimode pump combiner COM of (2+1) × 1
YDF, then exported by cladding pumping stripper CPS and the 4th isolator ISO4.When the 3rd pump light source Pump3 is 20W
When, the power for exporting laser is 10W, and return light now has 1mW, is put from the second circulator CIR2 3 ports to monitor two level
The back scattering luminous power of big circuit.Output light and rear orientation light are detected from oscillograph, be not observed from pulse and
Relaxation oscillation phenomenon, as shown in Figure 4.
Because multimode pump combiner COM tail optical fibers LMA-GDF-10/125 and the 3rd gain fibre YDF fusion point are maximum
About 20 watts of pump light is had by that in order to ensure pump light is not excessive, and radiating can be allowed to well, be melted to this point
The glue of low-refraction has been coated after the optimization processing connect, and has been placed on heat sink upper radiating；Coiling the 3rd gain fibre YDF
When, the 3rd gain fibre YDF caloric values are bigger during due to real work, so needing active fibre with certain order disk
It is wound in the cylinder aluminium dish of customization；Optimization has been used between 3rd gain fibre YDF output end and the 4th isolator ISO4
Cladding pumping stripper CPS carry out pumping stripping and heat treatment, when power output reaches 10W, after monitoring several hours
Stable output power is in the range of 1%, and cladding pumping stripper CPS temperature maintains 37.5 degrees Celsius hardly
Become.
3rd gain fibre YDF and Transmission Fibers are 10/125 optical fiber, to ensure that the light source of final output is that single mode passes
Defeated.Covering amplification principle is based on flashlight and transmitted in fibre core, and pump light transmits in inner cladding, thus can be to be swashed using multimode
Light diode array will be injected into the inner cladding of doped fiber as pumping source, pump light in a manner of oblique incidence, and with broken line
Mode pass through fibre core repeatedly, so as to cause pump light to be absorbed by dilute ytterbium ion in fibre core, realize the output of high-power laser.
One-level amplifies YDFA circuits and lifts the power of ASE seed sources to 100mW by 1mW, and two level amplifies YDFA circuits by 100mW
Power amplification is to 10W, it is necessary to which very high pumping pump power, radiating are to have to solve the problems, such as, therefore whole two level is amplified
YDFA circuits need to carry out on heat dissipation plate.
In the present embodiment, the second pump light source Pump2 is single-mode laser, and the 3rd pump light source Pump3 is 980nm
Multimode laser.First wavelength division multiplexer WDM1 and the second wavelength division multiplexer WDM2 is 980/1064nm wavelength division multiplexers.
, both can be according to actual need by the high-capacity optical fiber laser light path based on ASE filtering techniques of arrangement above
The suitable grating bandwidth of selection and polarization characteristic are asked, Gao Gong can also be realized using the fiber amplifier amplifying technique of maturation
The laser output of rate, high stability.
It should be appreciated that exemplary embodiment as described herein is illustrative and be not restrictive.Although retouched with reference to accompanying drawing
One or more embodiments of the present utility model are stated, it should be understood by one skilled in the art that without departing from appended
In the case of the spirit and scope of the present utility model that claim is limited, the change of various forms and details can be made.
Claims (10)
1. a kind of high-capacity optical fiber laser light path based on ASE filtering techniques, it is characterised in that including the full light being linked in sequence
Fine arrowband ASE seeds source light path, narrow band filter, one-level amplifying circuit and second amplifying circuit, the one-level amplifying circuit are
Forward pumping fibre core structure for amplifying, the second amplifying circuit are forward pumping double clad structure for amplifying, the one-level amplification electricity
The second circulator CIR2 is provided between road and second amplifying circuit.
2. the high-capacity optical fiber laser light path according to claim 1 based on ASE filtering techniques, it is characterised in that institute
State all -fiber arrowband ASE seeds source light path include faraday rotation mirror, the first wavelength division multiplexer, the first gain fibre, first every
From device and the first pump light source, the drawing revolving mirror, the first wavelength division multiplexer, the first gain fibre and the first isolator order
Connection, the first pump light source are coupled into the first gain fibre by the first wavelength division multiplexer.
3. the high-capacity optical fiber laser light path according to claim 2 based on ASE filtering techniques, it is characterised in that institute
Stating one-level amplifying circuit includes the second isolator, the second wavelength division multiplexer, the second gain fibre, the 3rd isolator and the second pumping
Light source, second isolator, the second wavelength division multiplexer, the second gain fibre and the 3rd isolator are linked in sequence, and described second
Pump light source is coupled into the second gain fibre by the second wavelength division multiplexer, and the 3rd isolator is connected with the second circulator.
4. the high-capacity optical fiber laser light path according to claim 3 based on ASE filtering techniques, it is characterised in that institute
Stating second amplifying circuit includes two the 3rd pump light sources, multimode pump combiner, the 3rd gain fibre, cladding pumping strippers
With the 4th isolator, the multimode pump combiner, the 3rd gain fibre, cladding pumping stripper and the 4th isolator order connect
Connect, described two 3rd pump light sources are injected into the 3rd gain fibre by multimode pump combiner, and beam is closed in the multimode pumping
Device is connected with the second circulator.
5. according to any described high-capacity optical fiber laser light paths based on ASE filtering techniques of claim 1-4, its feature exists
In the narrow band filter is connected and composed by first annular device and Fiber Bragg Grating FBG.
6. the high-capacity optical fiber laser light path according to claim 4 based on ASE filtering techniques, it is characterised in that institute
It is single-mode laser to state the first pump light source and the second pump light source, and the 3rd pump light source is 980nm multimode lasers.
7. the high-capacity optical fiber laser light path based on ASE filtering techniques according to claim 4 or 6, it is characterised in that
First wavelength division multiplexer and the second wavelength division multiplexer are 980/1064nm wavelength division multiplexers.
8. the high-capacity optical fiber laser light path according to claim 5 based on ASE filtering techniques, it is characterised in that light
The reflectivity of fine Bragg grating>99%, operation wavelength 1064.21nm.
9. the high-capacity optical fiber laser light path based on ASE filtering techniques according to claim 3 or 4, it is characterised in that
First gain fibre is single-mode fiber, and the second gain fibre is SM-YSF-HI optical fiber.
10. the high-capacity optical fiber laser light path based on ASE filtering techniques according to claim 4 or 6, its feature exist
In the 3rd gain fibre is 10/125 optical fiber.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418637A (en) * | 2018-05-10 | 2018-08-17 | 长春理工大学 | Underwater anti-turbulent flow high-speed optical soliton communication system |
| CN109038189A (en) * | 2018-07-27 | 2018-12-18 | 武汉光迅科技股份有限公司 | A kind of double 980 pump lasers in EDFA are to pump configuration |
| CN109217098A (en) * | 2018-10-29 | 2019-01-15 | 中国人民解放军国防科技大学 | Method for suppressing stimulated Raman scattering by fiber laser oscillator |
| CN110380325A (en) * | 2019-07-31 | 2019-10-25 | 深圳市镭神智能系统有限公司 | A kind of fiber amplifier |
| CN113671509A (en) * | 2021-08-16 | 2021-11-19 | 南京牧镭激光科技有限公司 | Large-energy multichannel laser radar beam switching method |
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2017
- 2017-05-11 CN CN201720521367.7U patent/CN206850214U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418637A (en) * | 2018-05-10 | 2018-08-17 | 长春理工大学 | Underwater anti-turbulent flow high-speed optical soliton communication system |
| CN109038189A (en) * | 2018-07-27 | 2018-12-18 | 武汉光迅科技股份有限公司 | A kind of double 980 pump lasers in EDFA are to pump configuration |
| CN109038189B (en) * | 2018-07-27 | 2019-12-31 | 武汉光迅科技股份有限公司 | Double 980 pump laser pair pump structure for EDFA |
| CN109217098A (en) * | 2018-10-29 | 2019-01-15 | 中国人民解放军国防科技大学 | Method for suppressing stimulated Raman scattering by fiber laser oscillator |
| CN109217098B (en) * | 2018-10-29 | 2019-10-15 | 中国人民解放军国防科技大学 | Method for Suppressing Stimulated Raman Scattering by Fiber Laser Oscillator |
| CN110380325A (en) * | 2019-07-31 | 2019-10-25 | 深圳市镭神智能系统有限公司 | A kind of fiber amplifier |
| CN113671509A (en) * | 2021-08-16 | 2021-11-19 | 南京牧镭激光科技有限公司 | Large-energy multichannel laser radar beam switching method |
| CN113671509B (en) * | 2021-08-16 | 2023-07-11 | 南京牧镭激光科技股份有限公司 | High-energy multichannel laser radar beam switching method |
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