CN107275917A - Infrared super continuum source in ultra wide band all -fiber - Google Patents
Infrared super continuum source in ultra wide band all -fiber Download PDFInfo
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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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
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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
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10084—Frequency control by seeding
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
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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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
Abstract
The invention provides infrared super continuum source in a kind of ultra wide band all -fiber, belong to super continuous spectrums laser technology field.Seed source laser, MOPA, fluoride fiber first-order linear raman cavity and the chalcogenide fiber first-order linear raman cavity that present system includes being sequentially connected with form effective pumping source equipment, and the sulfide step optical fiber for producing ultra wide band super continuous spectrums for rear end provides pump energy.The present invention is expanded seed optical wavelength to the zero-dispersion wavelength value (~5.2 μm) close to sulfide step optical fiber by two single order raman cavities, realizes infrared super continuous spectrums in 3~20 μm of ultra wide bands；Also avoid being cut out sulfide zero-dispersion wavelength simultaneously, effectively increase optical fiber effective core area, and then effectively improve the brightness of the coupling efficiency and super continuous spectrums of system；In addition, the present invention avoids realizing compact all optical fibre structure using pumping sources such as large-scale OPA, DFG, not only reduce cost and also reduce system loss, improve system coupling efficiency, light source integrated level and flexibility.
Description
Technical field
The invention belongs to super continuous spectrums laser technology field, and in particular to infrared super continuous spectrums in a kind of ultra wide band all -fiber
Light source.
Background technology
Wavelength not only covers 3~5 μm and 8~12 μm of the two atmospheric windows because of it in 3~20 μm of middle-infrared band,
The characteristic spectral line (molecular fingerprint spectrum) of most important molecules is also cover simultaneously, so this wave band is led in national defence, military affairs etc.
Domain has an extensive and special application, such as laser orientation interference/destruction, laser radar, infrared imaging, infrared distance measurement, poisonous
Gas is detected and molecule trace detection, photoelectronic warfare chemical/physical are studied etc..At present, the master of middle infrared spectrum output is realized
Technology path is wanted to include：QCL, solid state laser, free electron laser, chemical laser, gas laser
Device, the optical frequency-doubling laser based on nonlinear interaction, difference frequency laser, optical parametric oscillation OPO etc..However, in above-mentioned realization
The method of infrared spectrum output respectively has quality, such as：QCL small volume, but complicated, beam quality it is poor,
Power output is small；Although free electron laser covering wave-length coverage is very wide, expensive, bulky；Gas laser
Expensive gas is consumed with chemical laser, although is produced laser energy height, but can also be produced toxic chemical byproduct；Solid
It is high that laser and mid infrared laser produce laser energy, and can all solidstate, but need expensive crystal.And on
Deficiency is stated so that they are difficult to excellent combination property.
Common laser undergone in nonlinear dielectric a series of nonlinear effects (such as Self-phase modulation, Cross-phase Modulation,
Four-wave mixing, modulational instability, stimulated Raman scattering, arc quantum splitting etc.), make to generate many new frequencies in output spectrum
Composition, spectral region obtains very big broadening, it is this can output spectrum be known as by the light source of a wide range of continuous broadening it is super continuous
Compose light source.Based on infrared super continuum source in nonlinear optical fiber because it has high spatial coherence, wide spectral range, Gao Ji
The advantages such as Cheng Du, high brightness, are particularly suitable for vehicle-mounted, carrier-borne, unloaded military counterweapon, detection analysis instrument and atmospheric communication
The fields such as equipment, receive the concern of vast researcher in recent years.And be only limitted to can for the transparent wave band of conventional quartz optical fiber
See near infrared band (~2 μm), seriously limit broadening of the super continuous spectrums to middle-infrared band.Fluoride soft glass optical fiber has
Have low intrinsic loss and pass through window up to 5 μm of width, and its~1.6 μm of zero-dispersion wavelength be closer to it is more ripe at present
1.55 mu m waveband pulsed laser sources, be used to produce from the super continuous spectrums of visible infrared band.At present using fluorination object light
Fibre has realized the super continuous spectrums of 0.35~6.28 mu m waveband, but the power output of laser is only in mW magnitudes and wavelength>3μm
The general power of spectrum is even more less than 5mW.Optical fiber based on chalcogenide glass has than quartz and high two quantity of fluoride glass
The nonlinear factor of level, and it is 20 μm in the transparency range of middle-infrared band, it is considered to be most it is hopeful to obtain covering two
The nonlinear dielectric of the middle-infrared band super continuum light spectrum in individual atmospheric window and most of molecular fingerprint area.But chalcogenide glass
With longer zero-dispersion wavelength (~5 μm), broadband super continuous spectrums are effectively produced, it is necessary to burst pulse of the wavelength near 5 μm
It is used as pumping source.
Prior art, as Effects in Nonlinear Media with Gain, is passed through using sulfide microstructured optical fibers or suspention cored structure optical fiber
Change the airport dutycycle of optical fiber to control its dispersion characteristics, design suitable core diameter and cut out the zero dispersion point of optical fiber
It is to 5 μm and following, obtain super continuum source using suitable laser as effective pumping source.But this scheme uses micro-structural
Or suspention cored structure, on the one hand cause the effective core area of optical fiber to greatly reduce, so that light beam coupling difficulty is added, and
And limit the lifting of super continuous spectrums brightness, such as the article that ningbo of china university delivered in 2017《Mid-
infraredsupercontinuumgenerationinathree-holeGe20Sb15Se65chalcogenidesuspended-
corefiber》(《Infrared super continuous spectrums during core fibre is produced are suspended in midair by three holes》) in use three holes suspention core fibre core diameter for 6
μm, the coupling efficiency obtained successively only has 5%.On the other hand, the long wave of the super continuous spectrums obtained at present using this scheme
Edge is respectively less than 10 μm, in addition, micro-structural or the preparation process of suspention cored structure optical fiber require higher to preparation technology, it is tempered
The factors such as speed, air pressure, injection gas flow rate are difficult to accurate control, and the introducing of preparation process impurity easily increases fibre loss, entered
And make it that super continuous spectrums transmissivity is relatively low, spectrum width narrow range.
Prior art fibre core and covering prepare the larger sulfide step optical fiber of numerical aperture using different sulfide, such as
As2Se3-As2S3Chalcogenide fiber, As2Se3-AsSe2Chalcogenide fiber and Ge-Sb-Se chalcogenide fibers, and use large-scale ripple
Long adjustable light preamplifier (OpticalPreamplifierAmplifier, OPA) or optical difference frequency generator
Equipment such as (differencefrequencygeneratior, DFG) carries out pumping, is typically in its zero dispersion with centre wavelength
Pulsed light near wavelength is pumped into sulfide step optical fiber, and then obtains the super continuum source of different range.Such as use 150fs
Centre wavelength is 4.8 μm, pumping 20cmAs2Se3-As2S3Chalcogenide fiber (zero-dispersion wavelength be 4.5 μm), it can obtain 1.4~
8.8 μm of super continuum sources.Expanded using the emission spectrum long wave edge of infrared super continuum source in scheme to being more than
15μm.However, this scheme is used as pumping source using large scale equipments such as OPA, DFG of Wavelength tunable so that light-source system is extremely multiple
It is miscellaneous heavy and involve great expense；Simultaneously because it uses free space coupling system, pumping laser coupling after collimated is focused on
It is bonded in optical fiber, output tail optical fiber, lens and the optical fiber of laser need to carry out accurate adjustment after fixing, and limit light source flexible
Extra machine error can be also introduced while property, causes the coupling efficiency between pumping laser and optical fiber to decline；In addition, whole
System is not due to being all optical fibre structure, easily by external environmental interference and influence, reduces the stability and reliability of system.
Prior art carries out multistage to pumping laser using fluoride fiber as nonlinear dielectric, using cascade system and put
Greatly, using a variety of optical fiber as nonlinear dielectric and by the multistage spectrum widening of Raman self-frequency shift effect progress, then with this light source
Super continuum source is obtained in injection ZBLAN optical fiber.Using all optical fibre structure this method more, improve system stability and
Reliability, but the non-linear behavior of fluoride fiber is limited to, therefore obtained super continuous spectrums scope is narrower.At present, use
Fluoride fiber has realized the super continuous spectrums of 0.35~6.28 mu m waveband, but the power output of laser is only in mW magnitudes, and
And wavelength is even more less than 5mW more than the general power of 3 μm of spectrum.Hou Jing research groups of the National University of Defense technology are in article
《15.2Wspectrallyflatall-fibersupercontinuumlasersourcewith>1Wpowerbeyond3.8μ
m》)(《All -fiber super continuous spectrums lasing light emitter》) use ZBLAN fluoride fibers as nonlinear dielectric, pass through all optical fibre structure real
1.9~4.2 μm of super continuum sources are showed, as shown in figure 1, using repetition to be 1ns, centre wavelength for 6MHz, pulsewidth in experiment
For 1550nm pulse laser as seed source, light is co-doped with by an erbium-doped fiber amplifier (EDFA) and two erbium-ytterbiums
Pulse is amplified by fiber amplifier (EYDFAs), and the pulse peak power after amplification reaches 2kW, then is injected into single-mode fiber
(SMF) 1.5~2.3 μm of super continuous laser is produced by Raman soliton self-frequency shift, then is injected into thulium doped fiber amplifier
(TDFA) 1.5~1.9 μm of light absorbs are fallen, while by 1.9~2.2 μm of light amplification, the light after amplification passes through fiber mode
Further frequency displacement produces 1.9~2.8 μm of super continuous spectrums to field adapter (MFA), and injects the ZBLAN fluoride fibers of 12m length, real
Existing 1.9~4.2 mu m all-fiber super continuum sources.Then this scheme uses ZBLAN fluoride fibers as nonlinear dielectric,
Its nonlinear factor is smaller, and transparency range is at 0.2~4.5 μm so that the spectrum width of its broadening spectrum is restricted.
The content of the invention
The invention provides infrared super continuum source in a kind of ultra wide band all -fiber, the present invention effectively pumping source part is used
Being based respectively on the two-stage single order raman cavity of fluoride fiber and chalcogenide fiber realizes to 3.5 mu m waveband fluoride fiber pulses
The emission spectrum long wave edge of laser is expanded.
To achieve these goals, the present invention provides following technical scheme：
Infrared super continuum source in a kind of ultra wide band all -fiber, it is characterised in that include successively on optical path direction：Have
Effect pumping source equipment and the main broadening equipment that is attached thereto, wherein, effective pumping source device passes through all -fiber seed that is sequentially connected with
Source laser device, all -fiber master oscillation power amplification system, fluoride fiber first-order linear raman cavity and chalcogenide fiber single order
Linear raman cavity provides pump energy, and main broadening equipment includes producing the sulfide step optical fiber of super continuous spectrums.
It is further that the connected mode between each device connects for melting.
It is further that the wavelength of effective pumping source equipment is located at the anomalous dispersion region of the sulfide step optical fiber
And close to the sulfide step optical fiber zero dispersion point position.
It is further that all -fiber seed source laser is the mu m waveband pulse laser of all -fiber 3.5.
Specifically, the mu m waveband pulse laser of all -fiber 3.5 includes：First 976nm wave band pumping sources, the one 2.0 μ
M wave band pumping sources, the first wavelength division multiplexer, er-doped fluoride tapered fiber, the first Bragg grating and the second Bragg grating；
First 976nm wave band pumping sources, input of the one 2.0 mu m waveband pumping source respectively with the first wavelength division multiplexer is connected, and first
The output end of wavelength division multiplexer and the er-doped fluorination that the first Bragg grating and the second Bragg grating are provided with before and after light path
Thing tapered fiber is connected.
Specifically, the er-doped fluoride tapered fiber surface deposition has the two-dimensional material as saturable absorber.
Specifically, the two-dimensional material as saturable absorber is graphene, topological insulator, black phosphorus and transition gold
Belong to any in sulfide.
The all -fiber master oscillation power amplification system (MOPA) includes：2nd 976nm wave band pumping sources, the 2nd 2.0 μm
Wave band pumping source, the second wavelength division multiplexer, double clad er-doped fluoride fiber；2nd 976nm wave band pumping sources, the 2nd 2.0 μm
Input of the wave band pumping source respectively with the second wavelength division multiplexer is connected, output end and the double clad er-doped of the second wavelength division multiplexer
Fluoride fiber is connected.
The fluoride fiber first-order linear raman cavity includes successively in optical path direction：3rd Bragg grating, fluoride
Optical fiber and the 4th Bragg grating.
The chalcogenide fiber first-order linear raman cavity includes successively in optical path direction：5th Bragg grating, sulfide
Optical fiber and the 6th Bragg grating.
Reflectivity of first Bragg grating at its wavelength is not less than 95%
3rd Bragg grating, reflectivity of the 5th Bragg grating at respective wavelength are not less than 99%.
Second Bragg grating, the reflectivity of the 4th Bragg grating and the 6th Bragg grating at respective wavelength
Not less than 60%.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, the system includes the subsystem one of seed source laser and MOPA formation, fluoride fiber first-order linear raman cavity
Subsystem two, the subsystem three of chalcogenide fiber first-order linear raman cavity formation and the son of sulfide step optical fiber formation of formation
System four, effective pumping source equipment of subsystem one, subsystem two and the formation of subsystem three is realized to 3.5 mu m waveband pulse seeds
Long wavelength's Raman frequency shift of laser and power amplification, are expanded to close to sulfide step optical fiber by this technological means its wavelength
Zero-dispersion wavelength value (~5.2 μm), it is to avoid sulfide zero-dispersion wavelength is cut out, the effective mould field of optical fiber is effectively increased
Area, and then effectively improve the brightness of the coupling efficiency and super continuous spectrums of system；The present invention is exported by effective pumping source equipment
High power Raman impulses injection sulfide step optical fiber, realizes infrared super continuous spectrums in 3~20 μm of ultra wide bands, by long wavelength edges
Extend into 20 μm；The use of the pumping sources such as large-scale OPA, DFG is it also avoid simultaneously, reduces cost.
2nd, whole system is all integrated into a closed optic fibre environment by the system, laser pulse be all in systems by
Optical fiber transmission, can be completely not by ectocine, and then add the stability and persistence of whole system；The present invention is used
Compact all optical fibre structure, it is to avoid existing use space freely collimates the defect present in coupled apparatus, with the system energy
System loss is enough reduced, coupling efficiency, light source integrated level, flexibility is improved.
Brief description of the drawings
Fig. 1 is the structural representation of all -fiber super continuum source in the prior art.
The structural representation of infrared super continuum source in 3~20 μm of ultra wide band all -fibers that Fig. 2 provides for the present invention.
Embodiment
Technical scheme is described in further detail with reference to Figure of description and specific embodiment：
Embodiment：
As shown in Fig. 2 the system includes subsystem one, subsystem two, subsystem three, the subsystem four being sequentially connected, its
In, seed source laser and MOPA formation subsystems one, fluoride fiber first-order linear raman cavity formation subsystem two, sulfide
Optical fiber first-order linear raman cavity formation subsystem three, sulfide step optical fiber formation subsystem four；Subsystem one, the and of subsystem two
Subsystem three constitutes effective pumping source equipment of the system, and subsystem four constitutes the main broadening equipment of the system.In turn below
Introduce composition and the effect of each system：
Subsystem one is seed source laser first according to optical path direction, and the seed source laser includes：First 976nm
Wave band pumping source 1, the one 2.0 mu m waveband pumping source 2, the first wavelength division multiplexer 3, the first Bragg grating 5, er-doped fluoride are drawn
Bore the Bragg grating 7 of optical fiber 6 and second；The surface of er-doped fluoride tapered fiber 6 deposition has the two dimension as saturable absorber
Material, the two-dimensional material includes but is not limited to：It is any in graphene, topological insulator, black phosphorus and transient metal sulfide；
First 976nm wave bands pumping source 1, input of the one 2.0 mu m waveband pumping source 2 respectively with the first wavelength division multiplexer 3 are connected, and mix
Erbium fluoride tapered fiber 6 to form the first Bragg grating 5 and second of resonator according to being respectively provided with before and after optical path direction
Bragg grating 7, mixes the output of bait fluoride tapered fiber 6 and its front and rear Bragg grating 5,7 and the first wavelength division multiplexer 3
End is linked together by fusion point 4, by the first 976nm wave bands pumping source 1 and the 2nd 2.0 mu m waveband pumping source 2 to er-doped
Fluoride tapered fiber 6 carries out pumping, obtains 3.5 μm of pulse lasers as seed light.Wherein：First Bragg grating 5 for
The reflectivity of 3.5 mu m waveband lasers is 95%, and the second Bragg grating 7 is as 3.5 mu m waveband laser output couplers for this
The reflectivity of wave band of laser is 60%.
Then it is sequentially the master oscillation power amplification system being connected by fusion point 28 with seed source laser along optical path direction
Unite (MOPA), the MOPA is to be put seed light and coupling pump light with high light beam quality into doubly clad optical fiber
Greatly, so as to realize the high power amplification to seed light source；In this implementation using the 2nd 976nm wave bands pumping source 9, the 2nd 2.0 μm
Wave band pumping source 10, the second wavelength division multiplexer 11 and double clad mix bait fluoride fiber 13；2nd 976nm wave bands pumping source 9,
The input of 2 2.0 mu m waveband pumping sources 10, er-doped fluoride tapered fiber 6 respectively with the second wavelength division multiplexer 11 is connected, and makees
For gain media double clad mix the wavelength division multiplexer 11 of bait fluoride fiber 13 and second output end pass through fusion point 3 12 connect
It is connected together 3.5 μm of pulse seed light and coupling pump light are entered into double clad er-doped fluoride fiber 13 to form high-power fiber and puts
Big device, is able to 3.5 mu m waveband pulse seed light being amplified and obtains high power pulsed laser.
Followed by the subsystem two being connected with subsystem one by fusion point 4 14, subsystem two include fluoride fiber 16
And be respectively arranged at according to optical path direction before it and thereafter and formed first-order linear raman cavity the 3rd Bragg grating 15
With the 4th Bragg grating 17, based on stimulated raman scattering by the wavelength frequency displacement of 3.5 mu m waveband high power pulsed lasers extremely
4.4 μm (single order stokes light), wherein, the 3rd Bragg grating 15 is 99% for the reflectivity of 4.4 mu m waveband lasers, the
Four Bragg gratings 17 are 60% for the reflectivity of the wave band of laser as single order stokes light output coupler.
It is further continued for being sequentially to cross the subsystem three that fusion point 5 18 is connected with subsystem two-way along light path, subsystem three includes
Chalcogenide fiber 20 and be respectively arranged at according to optical path direction before it and thereafter and formed first-order linear raman cavity the 5th
The Bragg grating 21 of Bragg grating 19 and the 6th, based on stimulated raman scattering by 4.4 mu m waveband high power pulsed lasers
Wavelength frequency displacement to 5.2 μm (single order stokes light), wherein, the 5th Bragg grating 19 is for 5.2 mu m waveband wave band of laser
Reflectivity be 99%, the 6th Bragg grating 21 is as single order stokes light output coupler for the anti-of the wave band of laser
It is 60% to penetrate rate.
It is further continued for being sequentially to cross (the namely main broadening of subsystem four that fusion point 6 22 is connected with subsystem threeway along light path
Equipment), subsystem four includes the sulfide step optical fiber 23 as nonlinear dielectric, will be through subsystem one, subsystem two and son
System three forms 5.2 mu m waveband high power Raman impulses injection sulfide step optical fibers of effective pumping source equipment output, due to upper
The wave band of output Raman pulse is stated close to the zero-dispersion wavelength of sulfide step optical fiber, by above-mentioned chalcogenide fiber 20 with being based on Asia
The phase welding of sulfide step optical fiber 23 of tellurate, the sulfide step optical fiber of doping tellurite has higher nonlinear system
Number, wherein infrared transmission wavelength is up to 20 μm, using (~5.2 μm) the high power narrow-pulse laser of wavelength near its zero dispersion as having
Pumping source is imitated, in the non-linear process such as Self-phase modulation, Cross-phase Modulation, four-wave mixing, stimulated Raman scattering and group velocity color
Its spectrum obtains broadening under scattered collective effect, realizes infrared super continuous spectrums in 3~20 μm of ultra wide bands, long wavelength edges are extended
To 20 μm.
The technological thought of above example only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical scheme each falls within the scope of the present invention
Within.Embodiments of the present invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned embodiment party
Formula, in the knowledge that those of ordinary skill in the art possess, does on the premise of can also or else departing from present inventive concept
Go out various change.
Claims (10)
1. infrared super continuum source in a kind of ultra wide band all -fiber, it is characterised in that include successively on optical path direction：Effectively
Pumping source equipment and the main broadening equipment being attached thereto, wherein, effective pumping source device passes through all -fiber seed source that is sequentially connected with
Laser, all -fiber master oscillation power amplification system, fluoride fiber first-order linear raman cavity and chalcogenide fiber single order line
Property raman cavity provide pump energy, main broadening equipment include produce super continuous spectrums sulfide step optical fiber.
2. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 1, it is characterised in that described complete
Optical fiber seed source laser is the mu m waveband pulse laser of all -fiber 3.5.
3. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 2, it is characterised in that described complete
The mu m waveband pulse laser of optical fiber 3.5 includes：First 976nm wave band pumping sources, the one 2.0 mu m waveband pumping source, the first wavelength-division
Multiplexer, er-doped fluoride tapered fiber, the first Bragg grating and the second Bragg grating；First 976nm wave band pumping sources,
Input of the one 2.0 mu m waveband pumping source respectively with the first wavelength division multiplexer is connected, the output end of the first wavelength division multiplexer with
The er-doped fluoride tapered fiber connection of the first Bragg grating and the second Bragg grating is provided with before and after light path.
4. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 3, it is characterised in that described to mix
Erbium fluoride tapered fiber surface deposition has the two-dimensional material as saturable absorber.
5. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 4, it is characterised in that as can
The two-dimensional material of saturated absorbing body is any in graphene, topological insulator, black phosphorus and transient metal sulfide.
6. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 1, it is characterised in that described complete
Optical fiber master oscillation power amplification system includes：2nd 976nm wave band pumping sources, the 2nd 2.0 mu m waveband pumping source, the second wavelength-division is answered
With device, double clad er-doped fluoride fiber；2nd 976nm wave band pumping sources, the 2nd 2.0 mu m waveband pumping source respectively with the second ripple
The input connection of division multiplexer, the output end of the second wavelength division multiplexer is connected with double clad er-doped fluoride fiber.
7. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 1, it is characterised in that the fluorine
Compound optical fiber first-order linear raman cavity includes successively in optical path direction：3rd Bragg grating, fluoride fiber and the 4th Bradley
Lattice grating.
8. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 1, it is characterised in that the sulphur
Compound optical fiber first-order linear raman cavity includes successively in optical path direction：5th Bragg grating, chalcogenide fiber and the 6th Bradley
Lattice grating.
9. infrared super continuum source in a kind of ultra wide band all -fiber according to claim 1, it is characterised in that described to have
The wavelength for imitating pumping source equipment is located at the anomalous dispersion region of the sulfide step optical fiber and close to the sulfide step optical fiber
Zero dispersion point position.
10. infrared super continuum source, its feature in a kind of ultra wide band all -fiber according to any one of claim 1 to 9
It is, the connected mode between each part connects for melting.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887784A (en) * | 2017-11-08 | 2018-04-06 | 深圳大学 | A kind of nanosecond pulse optical fiber laser |
| CN108649415A (en) * | 2018-05-16 | 2018-10-12 | 深圳大学 | A kind of thulium doped optical fiber laser amplifier |
| CN112257243A (en) * | 2020-10-15 | 2021-01-22 | 天津大学 | Highly integrated Raman high-order topology laser source design method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107887784A (en) * | 2017-11-08 | 2018-04-06 | 深圳大学 | A kind of nanosecond pulse optical fiber laser |
| CN108649415A (en) * | 2018-05-16 | 2018-10-12 | 深圳大学 | A kind of thulium doped optical fiber laser amplifier |
| CN108649415B (en) * | 2018-05-16 | 2020-04-03 | 深圳大学 | Thulium-doped optical fiber laser amplifier |
| US20210281036A1 (en) * | 2020-03-09 | 2021-09-09 | Cybel, LLC. | Broadband tm-doped optical fiber amplifier |
| US11509109B2 (en) * | 2020-03-09 | 2022-11-22 | Cybel, LLC. | Broadband Tm-doped optical fiber amplifier |
| CN112257243A (en) * | 2020-10-15 | 2021-01-22 | 天津大学 | Highly integrated Raman high-order topology laser source design method |
| CN116544761A (en) * | 2023-07-06 | 2023-08-04 | 广东省新兴激光等离子体技术研究院 | System for producing compressible coherent Raman pulse fiber laser |
| CN116544761B (en) * | 2023-07-06 | 2023-09-22 | 广东省新兴激光等离子体技术研究院 | System for producing compressible coherent Raman pulse fiber laser |
| CN117543319A (en) * | 2024-01-09 | 2024-02-09 | 北京工业大学 | Mid-infrared rear spectrum enhancement broadband laser system |
| CN117543319B (en) * | 2024-01-09 | 2024-03-15 | 北京工业大学 | Mid-infrared rear spectrum enhancement broadband laser system |
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