CN105896256A - Dual-wavelength tunable intermediate infrared pulse fiber laser and method for obtaining laser - Google Patents
Dual-wavelength tunable intermediate infrared pulse fiber laser and method for obtaining laser Download PDFInfo
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- CN105896256A CN105896256A CN201610489117.XA CN201610489117A CN105896256A CN 105896256 A CN105896256 A CN 105896256A CN 201610489117 A CN201610489117 A CN 201610489117A CN 105896256 A CN105896256 A CN 105896256A
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
- H01S3/08009—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection using a diffraction grating
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/105—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length
- H01S3/1055—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the mutual position or the reflecting properties of the reflectors of the cavity, e.g. by controlling the cavity length one of the reflectors being constituted by a diffraction grating
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention provides a dual-wavelength tunable intermediate infrared pulse fiber laser and a method for obtaining the dual-wavelength tunable intermediate infrared pulse fiber laser. The laser comprises two laser pumping sources and two linear resonant cavities, wherein the inside of each linear resonant cavity is orderly provided with a dichroic mirror, a convex lens, a rare earth ion doped fiber, a convex lens, a dichroic mirror, a convex lens, a saturable absorber, a convex lens and a dichroic mirror; and plane blazed gratings are arranged below the dichroic mirrors. According to the dual-wavelength tunable intermediate infrared pulse fiber laser and the method for obtaining the laser provided by the invention, the condition that the traditional dual-wavelength tunable intermediate infrared pulse fiber laser needs to perform beam combination on two independent intermediate infrared pulse fiber lasers can be avoided, so that a scheme of dual-wavelength pulse fiber laser output can be realized, and the complexity degree of a system can be greatly simplified; a compound linear resonant cavity shares a saturable absorber, so that the wave band limitation of the existing single-cavity type dual-wavelength intermediate infrared pulse fiber laser and the problem that independent tuning of the wave length is difficult to be achieved can be solved; besides, the device structure is simple, and the portability and expansibility are strong.
Description
Technical field
The invention belongs to field of laser device technology, the mid-infrared pulse optical fiber of a kind of dual-wavelength tunable and acquisition
The method of the mid-infrared pulsed optical fibre laser of dual-wavelength tunable.
Background technology
2～5 μm mid-infrared pulse lasers are in biologic medical (laser lithotripsy, Soft tissue cutting, sclerous tissues's grinding), materials processing
The fields such as (organic polymer, pottery, plastics, glass), space optical communication, national defence (laser guidance, infrared directional jamming)
There is important application prospect, thus get more and more people's extensive concerning.Optical fiber laser, as a kind of novel laser instrument, is compared
The laser instrument such as traditional solid, gas, quasiconductor, have transformation efficiency height, good beam quality, heat dissipation capacity is good, be easily integrated
Etc. a series of significant advantages, therefore develop high performance mid-infrared pulse optical fiber and there is important scientific meaning and application
It is worth.At present, it is achieved the Major Technology of mid-infrared pulsed optical fibre laser output comprises two categories below: 1. adjust Q (to include main
The dynamic Q and passive Q-adjusted of adjusting), 2. locked mode (including active mode locking and passive mode-locking).Adjusting Q is to add in resonant cavity of fibre-optical laser
Enter extra active modulation device (corresponding actively Q-switched method) such as: acousto-optic modulator, electrooptic modulator etc. or saturable absorption
Material (corresponding passive Q-adjusted method) is such as: semiconductor saturable absorbing mirror, Graphene etc., it is achieved the periodicity to cavity loss
Modulation, thus produce the pulsed optical fibre laser of ns～μ s magnitude；The implementation process of locked mode is similar with sorting technique and tune Q, and institute is not
Active modulation device or saturable absorption material running parameter that the locked mode that is together is corresponding are different, thus realize optical fiber laser resonance
PGC demodulation between intracavity longitudinal mode, produces the pulsed optical fibre laser output of fs～ps magnitude.At present, there is a large amount of mid-infrared pulsed light
The relevant report of fibre laser, but be largely focused on and realize the output of Single wavelength pulsed optical fibre laser, by contrast, dual wavelength is special
It not that the dual wavelength pulse optical fiber laser instrument that wavelength can tune flexibly has bigger actual demand (such as: mixed recharge in some field
The laser surgery of length, the Materialbearbeitung mit Laserlicht of composite wavelength, multi-wavelength broadband spatial optic communication etc.).2012, electronics technology
The method that university Li Jian peak et al. utilizes acousto-optic modulator to synchronize actively Q-switched achieves 3 μm and 2 μm double wave long pulses experimentally
Rush optical-fiber laser output；In the same year, the method that they utilize acousto-optic modulator actively Q-switched to guide gain modulation achieves experimentally
3 μm and the output of 2 μm dual wavelength pulse optical fiber laser；2013, acousto-optic modulator and space balzed grating, were combined again by they
Achieve 3 μm and the output of 2 μm dual wavelength pulse optical fiber laser of tunable wave length.Compare actively Q-switched (or active mode locking) light
Fibre laser, passive Q-adjusted (or passive mode-locking) optical fiber laser structure is simpler, compact and cost is the cheapest, because of
This is more exposed to the favor of people in actual applications；2012, University of Electronic Science and Technology Li Jian peak et al. proposed a kind of mid-infrared
Cascade pulse optical fiber new construction, method based on passive mode-locking, 3 μm and 2 μm dual wavelength pulse optical fiber laser can be realized
Output；2013, they also been proposed a kind of passive mode-locking guide gain modulated dual-wavelength pulse optical fiber laser new construction,
3 μm and the output of 2 μm dual wavelength pulse optical fiber laser can be realized；2015, they utilized semiconductor saturable absorbing mirror conduct
Saturable absorber, mixes Ho3+Fluoride fiber, as gain media, guides gain modulation mechanism, rate based on passive Q-adjusted mechanism
3 μm first achieved experimentally and the output of 2 μm dual wavelength pulse optical fiber laser.But in such scheme, mid-infrared dual wavelength
The operation wavelength of pulse optical fiber is confined to 3 μm and 2 mu m wavebands and is difficult to flexible modulation.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to utilize compounded linear resonator cavity to share same saturable
Absorber, in conjunction with plane balzed grating, it is provided that a kind of export that wave band is optional, wavelength can the dual wavelength mid-infrared arteries and veins of independent tuning
The laser instrument rushing optical-fiber laser and the method for the mid-infrared pulsed optical fibre laser obtaining dual-wavelength tunable.
For achieving the above object, technical solution of the present invention is as follows:
The mid-infrared pulse optical fiber of a kind of dual-wavelength tunable, after the first laser pumping source, the first laser pumping source
First linear resonant cavity of side, the second laser pumping source, second linear resonant cavity at the second laser pumping source rear, first is linear
Intra resonant cavity set gradually along laser propagation direction the first dichroscope, the first convex lens, the first rare earth ion doped optical fiber,
Three convex lenss, the 3rd dichroscope, the 5th convex lens, saturable absorber, the 6th convex lens, the 4th dichroscope, second is linear
Intra resonant cavity set gradually along laser propagation direction the second dichroscope, the second convex lens, the second rare earth ion doped optical fiber,
Four convex lenss, the 3rd dichroscope, the 5th convex lens, saturable absorber, the 6th convex lens, the 4th dichroscope, two is the most humorous
The chamber that shakes shares the 3rd dichroscope, the 5th convex lens, saturable absorber, the 6th convex lens, the 4th dichroscope, the first dichroscope
Lower section is provided with the first plane balzed grating, is provided with the second plane balzed grating, below the second dichroscope.
It is preferred that, the first laser pumping source, the second laser pumping source are used to produce wavelength and are positioned at 976nm or 1150nm
Or the pumping laser of 1100nm or 793nm or 1900nm；The laser height that first pumping source is sent by the first dichroscope is saturating, right
The laser that first rare earth ion doped optical fiber sends is high anti-；The laser that second pumping source is sent by the second dichroscope is high thoroughly, to second
The laser that laser pumping source sends is high anti-；First plane balzed grating, is placed with littrow type structure, for the first rare earth ion
The signal laser wavelength that doped fiber produces is tuned；Second plane balzed grating, is placed with littrow type structure, for the
The signal laser wavelength that two rare earth ion doped optical fibers produce is tuned；First convex lens is for producing the first laser pumping source
Pumping laser be coupled in the first rare earth ion doped optical fiber, simultaneously to first rare earth ion doped optical fiber produce signal laser
Collimation；The pumping laser that second convex lens is used for the second laser pumping source produces is coupled in the second rare earth ion doped optical fiber,
The signal laser collimation simultaneously the second rare earth ion doped optical fiber produced；First rare earth ion doped optical fiber is and the first laser pump
The gain fibre that Pu source wavelength is corresponding, produces wavelength and is positioned at 2.7～2.9 μm or 2.8～3.0 μm or 2.9～3.2 μm or 1.9～2.1 μm
Or 2.0～2.2 signal lasers of μm；Second rare earth ion doped optical fiber is the gain fibre corresponding with the second laser pump (ing) source wavelength,
Produce wavelength and be positioned at 2.7～2.9 μm or 2.8～3.0 μm or 2.9～3.2 μm or 1.9～2.1 μm or the signal laser of 2.0～2.2 μm；
3rd convex lens is for the signal laser collimation produced by the first rare earth ion doped optical fiber；4th convex lens is for by the second rare earth
The signal laser collimation that ion-doped optical fiber produces；The signal laser that first rare earth ion doped optical fiber is produced by the 3rd dichroscope is high
The signal laser thoroughly, to the second rare earth ion doped optical fiber produced is high anti-, for by the sharp combiner of two wavelength；5th convex lens
Mirror for closing bundle laser focusing by the 3rd dichroscope；6th convex lens is for collimating the light of the 5th convex lens focus；Saturable is inhaled
Acceptor is positioned between the 5th convex lens and the 6th convex lens, is used for adjusting Q or mode locking pulse optical-fiber laser to produce；4th dichroscope
The laser part transmissive portion reflection producing the first rare earth ion doped optical fiber and the second rare earth ion doped optical fiber, as optical fiber
The output coupling of laser instrument.
It is preferred that, the first rare earth ion doped optical fiber is the gain fibre corresponding with the first laser pump (ing) source wavelength, second
Rare earth ion doped optical fiber is the gain fibre corresponding with the second laser pump (ing) source wavelength, produces wavelength and is positioned at the pump of 976nm laser
Source, Pu correspondence mixes Er3+Fluoride fiber, generation wavelength is positioned at the pumping source correspondence of 1150nm laser and mixes Ho3+Fluoride fiber,
Generation wavelength is positioned at the pumping source correspondence of 1100nm laser and mixes Dy3+Fluoride fiber, produces wavelength and is positioned at the pump of 793nm laser
Source, Pu correspondence mixes Tm3+Silica fibre, generation wavelength is positioned at the pumping source correspondence of 1900nm laser and mixes Ho3+Silica fibre.
It is preferred that, saturable absorber is Fe2+: ZnSe crystal or Graphene or transient metal sulfide or topology insulation
Body or black phosphorus.
It is preferred that, the direction of the light path of the first dichroscope and the first laser pumping source shoot laser is 45 degree, the two or two color
The direction of the light path of mirror and the second laser pumping source shoot laser is 45 degree.So it is easy to light path is collimated.
For achieving the above object, the present invention also provides for a kind of mid-infrared utilizing described laser instrument to obtain dual-wavelength tunable
The method of pulsed optical fibre laser, comprises the steps: that (1) opens the first laser pumping source, and the pumping laser of generation passes through first
After dichroscope, it is coupled in the first rare earth ion doped optical fiber by the first convex lens, the first rare earth ion doped optical fiber left end output
Signal laser through first dichroscope reflection after be radiated at littrow type structure place the first plane balzed grating, on, first is dilute
The signal laser of soil ion-doped optical fiber right-hand member output passes through the 3rd dichroscope, subsequently signal laser warp after the 3rd convex lens collimation
By saturable absorber after 5th convex lens focus, and again being collimated by the 4th convex lens, final vertical irradiation is at the four or two color
On mirror, signal laser is in the resonator cavity that the 4th dichroscope and the first plane balzed grating, placed with littrow type structure are formed
Vibration, and under the effect of saturable absorber produce pulse laser, finally through the 4th dichroscope coupling output, by regulation with
The level angle of the first plane balzed grating, that littrow type structure is placed can realize exporting pulsed optical fibre laser wavelength tuning；(2)
Opening the second laser pumping source, the pumping laser of generation is by, after the second dichroscope, being coupled into second by the second convex lens dilute simultaneously
In soil ion-doped optical fiber, the signal laser of the second rare earth ion doped optical fiber left end output is radiated at after the second dichroscope reflection
On the second plane balzed grating, with the placement of littrow type structure, the signal laser warp of the second rare earth ion doped optical fiber right-hand member output
4th convex lens is collimated, and is reflected by the 3rd dichroscope, and signal laser is inhaled by saturable after the 5th convex lens focus subsequently
Acceptor, and again collimated by the 4th convex lens, final vertical irradiation is on the 4th dichroscope, and this signal laser is at the 4th dichroscope
The resonator cavity formed with the second plane balzed grating, placed with littrow type structure vibrates, and at the work of saturable absorber
With lower generation pulse laser, finally through the 4th dichroscope coupling output, the second plane placed with littrow type structure by regulation
The level angle of balzed grating, realizes exporting pulsed optical fibre laser wavelength tuning, and finally this system is under saturable absorber effect,
Final output dual wavelength tunable mid-infrared pulsed optical fibre laser.
The invention have the benefit that (1) ingenious traditional double wavelength mid-infrared pulse optical fiber that avoids needs two independences for Taiwan
Vertical mid-infrared pulse optical fiber carries out closing bundle, it is achieved thereby that the scheme of dual wavelength pulse optical fiber laser output, significantly letter
Change the complexity of system；(2) compounded linear resonator cavity is used to share same saturable absorber, in conjunction with plane balzed grating,
The scheme of independent tuning optical-fiber laser wavelength, solves existing single-chamber type dual wavelength mid-infrared pulse optical fiber wave band limitation
And it is difficult to a difficult problem for wavelength independent tuning；(3) apparatus structure is simple, portable strong with expansion.
Accompanying drawing explanation
Fig. 1 is the structural representation of this laser instrument；
Wherein, 1 is the first laser pumping source, and 2 is the second laser pumping source, and 3 is the first dichroscope, and 4 is the second dichroscope, 5
Being the first plane balzed grating, 6 is the second plane balzed grating, and 7 is the first convex lens, and 8 is the second convex lens, and 9 is first
Rare earth ion doped optical fiber, 10 is the second rare earth ion doped optical fiber, and 11 is the 3rd convex lens, and 12 is the 4th convex lens, 13
Being the 3rd dichroscope, 14 is the 5th convex lens, and 15 is saturable absorber, and 16 is the 6th convex lens, and 17 is the 4th dichroscope.
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by disclosed by this specification
Content understand other advantages and effect of the present invention easily.The present invention can also be added by the most different detailed description of the invention
To implement or application, the every details in this specification can also be based on different viewpoints and application, in the essence without departing from the present invention
Various modification or change is carried out under god.
The mid-infrared pulse optical fiber of a kind of dual-wavelength tunable, including first laser pumping source the 1, first laser pumping source 1
First linear resonant cavity at rear, second linear resonant cavity at second laser pumping source the 2, second laser pumping source rear, first
Set gradually first dichroscope the 3, first convex lens the 7, first rare earth ion doped light along laser propagation direction inside linear resonant cavity
Fine 9, the 3rd convex lens the 11, the 3rd dichroscope the 13, the 5th convex lens 14, saturable absorber the 15, the 6th convex lens 16,
4th dichroscope 17, set gradually along laser propagation direction inside the second linear resonant cavity second dichroscope the 4, second convex lens 8,
Second rare earth ion doped optical fiber the 10, the 4th convex lens the 12, the 3rd dichroscope the 13, the 5th convex lens 14, saturable absorber
15, the 6th convex lens the 16, the 4th dichroscope 17, two linear resonant cavities share the 3rd dichroscope the 13, the 5th convex lens 14, can
Saturated absorbing body the 15, the 6th convex lens the 16, the 4th dichroscope 17, is provided with the first plane balzed grating, 5 below the first dichroscope 3,
The second plane balzed grating, 6 it is provided with below second dichroscope 4.
First laser pumping source the 1, second laser pumping source 2 is used to produce wavelength and is positioned at 976nm or 1150nm or 1100nm
Or the pumping laser of 793nm or 1900nm；The laser that first pumping source is sent by the first dichroscope 3 is high thoroughly, to the first rare earth
The laser that ion-doped optical fiber 9 sends is high anti-；The laser that second pumping source is sent by the second dichroscope 4 is high thoroughly, to the second laser
The laser that pumping source sends is high anti-；First plane balzed grating, 5 is placed with littrow type structure, for mixing the first rare earth ion
The signal laser wavelength that veiling glare fibre produces is tuned；Second plane balzed grating, 6 is placed with littrow type structure, for the
The signal laser wavelength that two rare earth ion doped optical fibers produce is tuned；First convex lens 7 is for producing the first laser pumping source
Raw pumping laser is coupled in the first rare earth ion doped optical fiber, and the signal simultaneously produced the first rare earth ion doped optical fiber swashs
Light collimates；Second convex lens 8 is for being coupled into the second rare earth ion doped optical fiber by the pumping laser that the second laser pumping source produces
In, the signal laser collimation simultaneously the second rare earth ion doped optical fiber produced；First rare earth ion doped optical fiber 9 is and first
The gain fibre that laser pump (ing) source wavelength is corresponding, produce wavelength be positioned at 2.7～2.9 μm or 2.8～3.0 μm or 2.9～3.2 μm or
1.9～2.1 μm or the signal laser of 2.0～2.2 μm；Second rare earth ion doped optical fiber 10 is and the second laser pump (ing) source wavelength pair
The gain fibre answered, produces wavelength and is positioned at 2.7～2.9 μm or 2.8～3.0 μm or 2.9～3.2 μm or 1.9～2.1 μm or 2.0～2.2 μm
Signal laser；3rd convex lens 11 is for the signal laser collimation produced by the first rare earth ion doped optical fiber 9；4th convex lens
Mirror 12 is for the signal laser collimation produced by the second rare earth ion doped optical fiber 10；3rd dichroscope 13 is to the first rare earth ion
The signal laser that doped fiber 9 produces signal laser high thoroughly, that produce the second rare earth ion doped optical fiber 10 is high anti-, for will
The sharp combiner of two wavelength；5th convex lens 14 is for closing bundle laser focusing by the 3rd dichroscope 13；6th convex lens 16 is used
In the light of the 5th convex lens focus is collimated；Saturable absorber 15 is positioned between the 5th convex lens 14 and the 6th convex lens 16,
For adjusting Q or mode locking pulse optical-fiber laser to produce；4th dichroscope 17 is to the first rare earth ion doped optical fiber 9 and the second rare earth
The laser part transmissive portion reflection that ion-doped optical fiber 10 produces, the output as optical fiber laser couples.
First rare earth ion doped optical fiber 9 is the gain fibre corresponding with the first laser pump (ing) source wavelength, and second is rare earth ion doped
Optical fiber 10 is the gain fibre corresponding with the second laser pump (ing) source wavelength, produces wavelength and is positioned at the pumping source correspondence of 976nm laser
Mix Er3+Fluoride fiber, generation wavelength is positioned at the pumping source correspondence of 1150nm laser and mixes Ho3+Fluoride fiber, produces wavelength
The pumping source correspondence being positioned at 1100nm laser mixes Dy3+Fluoride fiber, produces wavelength and is positioned at the pumping source correspondence of 793nm laser
Mix Tm3+Silica fibre, generation wavelength is positioned at the pumping source correspondence of 1900nm laser and mixes Ho3+Silica fibre.
Saturable absorber 15 is Fe2+: ZnSe crystal or Graphene or transient metal sulfide or topological insulator or black phosphorus.
The direction of the light path of the first dichroscope 3 and the first laser pumping source 1 shoot laser is 45 degree, the second dichroscope 4 and second
The direction of the light path of laser pumping source 2 shoot laser is 45 degree.So it is easy to light path is collimated.
The method utilizing the mid-infrared pulsed optical fibre laser of above-mentioned laser instrument acquisition dual-wavelength tunable, comprises the steps: (1)
Opening the first laser pumping source 1, the pumping laser of generation, by after the first dichroscope 3, is coupled into first by the first convex lens 7 dilute
In soil ion-doped optical fiber 9, the signal laser of the first rare earth ion doped optical fiber 9 left end output is after the first dichroscope 3 reflection
It is radiated on the first plane balzed grating, 5 with the placement of littrow type structure, the first rare earth ion doped optical fiber 9 right-hand member output
Signal laser is by the 3rd dichroscope 13 after the 3rd convex lens 11 collimation, and signal laser is after the 5th convex lens 14 focuses on subsequently
By saturable absorber 15, and again being collimated by the 4th convex lens 16, final vertical irradiation, on the 4th dichroscope 17, is believed
Number laser shakes in the resonator cavity that the 4th dichroscope 17 and the first plane balzed grating, 5 placed with littrow type structure are formed
Swing, and under the effect of saturable absorber 15, produce pulse laser, finally through the 4th dichroscope 17 coupling output, by adjusting
The level angle saving the first plane balzed grating, 5 with the placement of littrow type structure can realize exporting pulsed optical fibre laser wavelength tune
Humorous；(2) opening the second laser pumping source 2, the pumping laser of generation is by after the second dichroscope 4, by the second convex lens 8 simultaneously
Being coupled in the second rare earth ion doped optical fiber 10, the signal laser of the second rare earth ion doped optical fiber 10 left end output is through second
It is radiated at after dichroscope 4 reflection on the second plane balzed grating, 6 with the placement of littrow type structure, the second rare earth ion doped light
The signal laser of fine 10 right-hand member outputs is collimated through the 4th convex lens 12, and is reflected by the 3rd dichroscope 13, signal laser subsequently
By saturable absorber 15 after the 5th convex lens 14 focuses on, and again collimated by the 4th convex lens 16, final vertical irradiation
On the 4th dichroscope 17, this signal laser glares with the second plane placed with littrow type structure at the 4th dichroscope 17
The resonator cavity that grid 6 are formed vibrates, and under the effect of saturable absorber 15, produces pulse laser, finally through the four or two color
Mirror 17 coupling output, realizes defeated by regulation with the level angle of the second plane balzed grating, 6 of littrow type structure placement
Going out pulsed optical fibre laser wavelength tuning, finally this system is under saturable absorber 15 acts on, and final output dual wavelength is tunable
Mid-infrared pulsed optical fibre laser.
The combination of compounded linear resonator cavity and biplane balzed grating, makes the dual wavelength mid-infrared pulse optical fiber not only can be real
Existing wave band selects flexibly, can realize wavelength independent tuning simultaneously.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any it is familiar with this skill
Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage of art.Therefore, all institutes
Belong to and technical field has all equivalences that usually intellectual is completed under without departing from disclosed spirit and technological thought
Modify or change, must be contained by the claim of the present invention.
Claims (6)
1. the mid-infrared pulse optical fiber of a dual-wavelength tunable, it is characterised in that: include the first laser pumping source,
First linear resonant cavity at one laser pumping source rear, the second laser pumping source, the second laser pumping source rear second the most humorous
Shake chamber, the first linear intra resonant cavity set gradually along laser propagation direction the first dichroscope, the first convex lens, the first rare earth from
Sub-doped fiber, the 3rd convex lens, the 3rd dichroscope, the 5th convex lens, saturable absorber, the 6th convex lens, the four or two
Color mirror, set gradually along laser propagation direction inside the second linear resonant cavity the second dichroscope, the second convex lens, the second rare earth from
Sub-doped fiber, the 4th convex lens, the 3rd dichroscope, the 5th convex lens, saturable absorber, the 6th convex lens, the four or two
Color mirror, two linear resonant cavities share the 3rd dichroscope, the 5th convex lens, saturable absorber, the 6th convex lens, the four or two color
Mirror, is provided with the first plane balzed grating, below the first dichroscope, be provided with the second plane balzed grating, below the second dichroscope.
The mid-infrared pulse optical fiber of dual-wavelength tunable the most according to claim 1, it is characterised in that: first swashs
Optical pumping source, the second laser pumping source be used to produce wavelength be positioned at 976nm or 1150nm or 1100nm or 793nm or
The pumping laser of 1900nm；Laser that first pumping source is sent by the first dichroscope is high thoroughly, send out the first rare earth ion doped optical fiber
The laser gone out is high anti-；The laser that the laser that second pumping source is sent by the second dichroscope is high thoroughly, send the second laser pumping source is high
Instead；First plane balzed grating, is placed with littrow type structure, for the signal laser producing the first rare earth ion doped optical fiber
Wavelength is tuned；Second plane balzed grating, is placed with littrow type structure, for producing the second rare earth ion doped optical fiber
Signal laser wavelength be tuned；First convex lens is dilute for the pumping laser that the first laser pumping source produces is coupled into first
In soil ion-doped optical fiber, the signal laser collimation simultaneously the first rare earth ion doped optical fiber produced；Second convex lens is used for will
The pumping laser that second laser pumping source produces is coupled in the second rare earth ion doped optical fiber, simultaneously rare earth ion doped to second
The signal laser collimation that optical fiber produces；First rare earth ion doped optical fiber is the gain fibre corresponding with the first laser pump (ing) source wavelength,
Produce wavelength and be positioned at 2.7～2.9 μm or 2.8～3.0 μm or 2.9～3.2 μm or 1.9～2.1 μm or the signal laser of 2.0～2.2 μm；
Second rare earth ion doped optical fiber is the gain fibre corresponding with the second laser pump (ing) source wavelength, produces wavelength and is positioned at 2.7～2.9 μm
Or 2.8～3.0 μm or 2.9～3.2 μm or 1.9～2.1 μm or the signal laser of 2.0～2.2 μm；3rd convex lens is for dilute by first
The signal laser collimation that soil ion-doped optical fiber produces；4th convex lens is for the signal produced by the second rare earth ion doped optical fiber
Laser alignment；The signal laser that first rare earth ion doped optical fiber is produced by the 3rd dichroscope is high thoroughly, rare earth ion doped to second
The signal laser that optical fiber produces is high anti-, for by the sharp combiner of two wavelength；5th convex lens is for closing bundle by the 3rd dichroscope
Laser focusing；6th convex lens is for collimating the light of the 5th convex lens focus；Saturable absorber be positioned over the 5th convex lens and
Between 6th convex lens, it is used for adjusting Q or mode locking pulse optical-fiber laser to produce；4th dichroscope is to the first rare earth ion doped optical fiber
The laser part transmissive portion reflection produced with the second rare earth ion doped optical fiber, the output as optical fiber laser couples.
The mid-infrared pulse optical fiber of dual-wavelength tunable the most according to claim 1, it is characterised in that: first is dilute
Soil ion-doped optical fiber is the gain fibre corresponding with the first laser pump (ing) source wavelength, and the second rare earth ion doped optical fiber is and second
The gain fibre that laser pump (ing) source wavelength is corresponding, generation wavelength is positioned at the pumping source correspondence of 976nm laser and mixes Er3+Fluoride fiber,
Generation wavelength is positioned at the pumping source correspondence of 1150nm laser and mixes Ho3+Fluoride fiber, produces wavelength and is positioned at 1100nm laser
Pumping source correspondence mixes Dy3+Fluoride fiber, generation wavelength is positioned at the pumping source correspondence of 793nm laser and mixes Tm3+Silica fibre,
Generation wavelength is positioned at the pumping source correspondence of 1900nm laser and mixes Ho3+Silica fibre.
The mid-infrared pulse optical fiber of dual-wavelength tunable the most according to claim 1, it is characterised in that: saturable
Absorber is Fe2+: ZnSe crystal or Graphene or transient metal sulfide or topological insulator or black phosphorus.
The mid-infrared pulse optical fiber of dual-wavelength tunable the most according to claim 1, it is characterised in that: the one or two
The direction of the light path of color mirror and the first laser pumping source shoot laser is 45 degree, and the second dichroscope and the second laser pumping source outgoing swash
The direction of the light path of light is 45 degree.
6. utilize the laser instrument described in claim 1 to 5 any one to obtain the mid-infrared pulsed optical fibre laser of dual-wavelength tunable
Method, it is characterised in that comprise the steps: that (1) opens the first laser pumping source, the pumping laser of generation pass through the one or two
After color mirror, it is coupled in the first rare earth ion doped optical fiber by the first convex lens, the first rare earth ion doped optical fiber left end output
Signal laser is radiated on the first plane balzed grating, placed with littrow type structure after the first dichroscope reflection, the first rare earth
The signal laser of ion-doped optical fiber right-hand member output is by the 3rd dichroscope after the 3rd convex lens collimation, and signal laser is through the subsequently
By saturable absorber after five convex lens focus, and again being collimated by the 4th convex lens, final vertical irradiation is at the 4th dichroscope
On, signal laser shakes in the resonator cavity that the 4th dichroscope and the first plane balzed grating, placed with littrow type structure are formed
Swing, and under the effect of saturable absorber produce pulse laser, finally through the 4th dichroscope coupling output, by regulation with
The level angle of the first plane balzed grating, that littrow type structure is placed can realize exporting pulsed optical fibre laser wavelength tuning；(2)
Opening the second laser pumping source, the pumping laser of generation is by, after the second dichroscope, being coupled into second by the second convex lens dilute simultaneously
In soil ion-doped optical fiber, the signal laser of the second rare earth ion doped optical fiber left end output is radiated at after the second dichroscope reflection
On the second plane balzed grating, with the placement of littrow type structure, the signal laser warp of the second rare earth ion doped optical fiber right-hand member output
4th convex lens is collimated, and is reflected by the 3rd dichroscope, and signal laser is inhaled by saturable after the 5th convex lens focus subsequently
Acceptor, and again collimated by the 4th convex lens, final vertical irradiation is on the 4th dichroscope, and this signal laser is at the 4th dichroscope
The resonator cavity formed with the second plane balzed grating, placed with littrow type structure vibrates, and at the work of saturable absorber
With lower generation pulse laser, finally through the 4th dichroscope coupling output, the second plane placed with littrow type structure by regulation
The level angle of balzed grating, realizes exporting pulsed optical fibre laser wavelength tuning, and finally this system is under saturable absorber effect,
Final output dual wavelength tunable mid-infrared pulsed optical fibre laser.
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| CN106410579A (en) * | 2016-11-24 | 2017-02-15 | 电子科技大学 | Ultra-wide-band mid-infrared optical fiber superfluorescence emitter |
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| CN106299986B (en) * | 2016-10-31 | 2019-05-07 | 电子科技大学 | A kind of passive Q-adjusted mid-infrared fiber laser of optional dual wavelength of all -fiber wavelength |
| CN106410579A (en) * | 2016-11-24 | 2017-02-15 | 电子科技大学 | Ultra-wide-band mid-infrared optical fiber superfluorescence emitter |
| CN106410579B (en) * | 2016-11-24 | 2018-11-13 | 电子科技大学 | A kind of ultra wide band mid-infrared light fibre Superfluorescence device |
| CN108063364A (en) * | 2018-01-05 | 2018-05-22 | 南京大学 | Semiconductor exocoel mode-locked laser based on Cadmium arsenide's material |
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| CN110535014A (en) * | 2019-08-02 | 2019-12-03 | 苏州众为光电有限公司 | Infrared mode locked fiber laser in a kind of tunable wave length |
| CN111289466A (en) * | 2020-03-30 | 2020-06-16 | 云南电网有限责任公司电力科学研究院 | Transformer oil dissolved gas analysis photoelectric sensor based on dual-mode external cavity laser |
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