CN107302174B - A kind of mid-infrared fiber laser and operating method of ultra wide band continuously adjustable - Google Patents
A kind of mid-infrared fiber laser and operating method of ultra wide band continuously adjustable Download PDFInfo
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- CN107302174B CN107302174B CN201710694417.6A CN201710694417A CN107302174B CN 107302174 B CN107302174 B CN 107302174B CN 201710694417 A CN201710694417 A CN 201710694417A CN 107302174 B CN107302174 B CN 107302174B
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- 239000000835 fiber Substances 0.000 title claims abstract description 63
- 238000011017 operating method Methods 0.000 title abstract description 6
- 238000005086 pumping Methods 0.000 claims abstract description 109
- 239000013307 optical fiber Substances 0.000 claims abstract description 98
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 85
- -1 rare earth ion Chemical class 0.000 claims description 75
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 23
- 230000003287 optical effect Effects 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 150000002910 rare earth metals Chemical class 0.000 claims description 6
- 238000009738 saturating Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 description 3
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009975 flexible effect Effects 0.000 description 2
- 230000004313 glare Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000004770 chalcogenides Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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
-
- 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
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094003—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light the pumped medium being a fibre
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses the mid-infrared fiber lasers and operating method of a kind of ultra wide band continuously adjustable, laser includes first laser pumping source (1), first rare earth ion doped optical fiber (4), plane diffraction grating (6), second laser pumping source (7), second rare earth ion doped optical fiber (10), third laser pumping source (12), 4th laser pumping source (13) and third rare earth ion doped optical fiber (17), pass through three kinds of different rare earth ion doped optical fibers in parallel, using same plane diffraction grating as wavelength tuning device, realize the mid-infrared light fibre laser output of 2.8~4 μ m wavelength range continuously adjustables, it solves the problems, such as existing single-chamber type mid-infrared fiber laser tuning band restricted gender and is difficult to realize broadband wavelength all standing continuous tuning；There is the program excellent expansibility parallel branch can be adjusted flexibly according to actual wavelength demand since parallel branch is independent of each other simultaneously；Apparatus structure is simple, and portable and expansion is strong.
Description
Technical field
The present invention relates to a kind of mid-infrared light of mid-infrared laser technical field more particularly to ultra wide band continuously adjustable fibres
Laser.
Background technique
Infrared band is in important propagation in atmosphere window in 3~5 μm, while also covering the suction of numerous important chemical bonds
Receive peak, wavelength is located at that the laser of this wave band is handed in space optical communication, biologic medical, material, the fields such as detection of gas all have
There is important application value.
Optical fiber laser is as a kind of new laser type, such as compared to conventional laser: solid state laser, gas laser
Device, semiconductor laser etc. have high conversion efficiency, good beam quality, excellent heat radiation performance, a series of advantages such as are easily integrated, closely
Domestic and international research hotspot is had become over a little years.Wherein, mid-infrared fiber laser is even more since its huge application prospect obtains
The concern and favor of numerous researchers.The operation wavelength of mid-infrared fiber laser more mature at present also focuses on
2.8~2.9 mu m wavebands are gradually extended to 3~5 mum wavelength regions in recent years.
2013, Er mixed using 3.005 μm in Canadian Université Laval3+Fluoride fiber laser as fundamental frequency source,
Chalcogenide fiber is exported as gain media by the optical-fiber laser that single order Raman realizes 3.34 μm；Then, they are to laser
Device resonant cavity is optimized, and by second order Raman frequency shift, realizes 3.77 μm of optical-fiber laser output；2014, the big benefit of Australia
Sub- University of Adelaide Ori Henderson-Sapir et al. is pumped simultaneously using 985nm and 1973nm dual wavelength mixes Er3+Fluorination
Object light is fine, realizes 3.604 μm of optical-fiber laser output, provides new method for the expansion of mid-infrared light fibre optical maser wavelength；With
Canada Université Laval Vincent Fortin et al. is promoted laser output power to 1.5W using identical method afterwards；
2016, Australian Macquarie University Matthew R.Majewski et al. mixed Er using 2.8 μm3+Fluoride fiber laser
Device mixes Dy as pumping source3+Fluoride fiber realizes 3.26 μm of optical-fiber laser output as gain media.
Above-mentioned mid-infrared fiber laser works in single wavelength state, in contrast, infrared in tunable wave length
Optical fiber laser will meet more application demands, with bigger application value in practical applications.
2016, Adelaide, AUS university Ori Henderson-Sapir et al. was in 980nm and 1973nm double wave
It is long while pumping to mix Er3+3.33 μm~3.78 μm (450nm) optical-fiber laser broadbands are realized in fluoride fiber laser can
Tuning；The same year Macquarie University, Australia Matthew R.Majewski et al. mixes Er at 2.8 μm3+Fluoride fiber laser
Dy is mixed in pumping3+2.95 μm~3.35 μm (400nm) optical-fiber laser wideband adjustables are realized in fluoride fiber laser.
Patent [CN201610911352.1] is disclosed Er3+Fluoride fiber and mix Dy3+Fluoride fiber series connection, leads to
It crosses plane balzed grating, and carries out the new method that wavelength selection realizes the output of 3 μm~3.8 mum wavelength tunable fiber laser.Due to not
It is mutual overlapping with energy level absorption/transmitting band between rare earth ion doped optical fiber and influence, to realize the wavelength tuning of wide scope
Accurate design and optimization need to be carried out to the parameter of the train.
Existing fiber laser can realize 2.95~3.35 mum wavelength sections and 3.33 μm~3.78 mum wavelength sections respectively
Tunable optical-fiber laser output, tuning range is limited, limits its practical application.
There is not yet a fiber laser system at present, can be realized the adjustable of infrared band range in 3~4 μm of wide scope
Humorous laser exports, and if desired wavelength switches, then needs the laser of more different output wavelengths, and complicated, expensive and shortage is flexible
Property, controllability.
Summary of the invention
For the above problem existing for fiber laser system in the prior art, the invention discloses a kind of ultra wide band is continuous
Tunable mid-infrared fiber laser device and operating method.
Technical scheme is as follows:
The invention discloses a kind of mid-infrared fiber lasers of ultra wide band continuously adjustable, specifically include first laser
Pumping source (1), the first rare earth ion doped optical fiber (4), plane diffraction grating (6), second laser pumping source (7), the second rare earth
Ion-doped optical fiber (10), third laser pumping source (12), the 4th laser pumping source (13) and third rare earth ion doped optical fiber
(17)。
Further, above-mentioned first laser pumping source (1) is sequentially connected the first rare earth ion along optical output direction and mixes
Veiling glare fibre (4) and plane diffraction grating (6)；Second laser pumping source (7) along optical output direction be sequentially connected the second rare earth from
Sub- doped fiber (10) and plane diffraction grating (6)；The laser of third laser pumping source (12) and the 4th laser pumping source (13)
Outbound course after closing beam is sequentially connected third rare earth ion doped optical fiber (17) and plane diffraction grating (6).
Further, the laser coupled that above-mentioned first laser pumping source (1) generates is into the first rare earth ion doped optical fiber
(4) it in, is incident on plane diffraction grating (6) after the first signal laser collimation of the first rare earth ion doped optical fiber (4) output,
First signal laser is fed back in the first resonant cavity through plane diffraction grating (6), and the first of output is vibrated in the first resonant cavity
Collimated coupled by the first dichroic mirror (2) of signal exports；The laser coupled that second laser pumping source (7) generates is into the second rare earth
In ion-doped optical fiber (10), the second signal laser of the second rare earth ion doped optical fiber (10) output is collimated to be incident on plane
On diffraction grating (6), second signal laser is fed back in the second resonant cavity through plane diffraction grating (6), in the second resonant cavity
Collimated coupled by the second dichroic mirror (8) of second signal laser for vibrating output exports；Third laser pumping source (12) and
The laser that 4th laser pumping source (13) generates closes beam through third dichroic mirror (14), and it is rare earth ion doped to be then coupled into third
Optical fiber (17), the third signal laser of third rare earth ion doped optical fiber (17) output is collimated to be incident on plane diffraction grating
(6) on, third signal laser is fed back in third resonant cavity through plane diffraction grating (6), and output is vibrated in third resonant cavity
Third signal laser it is collimated pass through the 4th dichroic mirror (15) coupling output.
Further, above-mentioned first laser pumping source (1) and second laser pumping source (7) are located at for generation wavelength
The pumping laser of 1150nm or 2800nm；Third laser pumping source (12) and the 4th laser pumping source (13) are used for generation wavelength position
In the pumping laser of 1973nm or 976nm；Wherein, if third laser pumping source (12) is located at the pump of 1973nm for generation wavelength
Pu laser, then the 4th laser pumping source (13) is located at the pumping laser of 976nm for generation wavelength；If third laser pumping source
(12) it is located at the pumping laser of 976nm for generation wavelength, then the 4th laser pumping source (13) is located at for generation wavelength
The pumping laser of 1973nm.
Further, above-mentioned first rare earth ion doped optical fiber (4), the second rare earth ion doped optical fiber (10) and third
Rare earth ion doped optical fiber (17) is in optical fiber front end vertical cut, the angle beveling of 8 degree of rear end；First resonant cavity, the second resonant cavity and
The Fresnel reflection and plane diffraction grating that third resonant cavity is provided by rare earth ion doped optical fiber (4,10,17) front end vertical cut
(6) it constitutes, wherein plane diffraction grating (6) is with the placement of littrow type structure.
Further, above-mentioned first rare earth ion doped optical fiber (4) generation wavelength is located at 2.8~3.0 μm or 3~3.35
μm the first signal laser；Second rare earth ion doped optical fiber (10) generation wavelength is positioned at 2.8~3.0 μm or 3~3.35 μm
Second signal laser；Third rare earth ion doped optical fiber (17) generation wavelength is located at 3.35~4.0 μm of third signal laser.
Further, above-mentioned first rare earth ion doped optical fiber (4) and the second rare earth ion doped optical fiber (10) are to mix
Ho3+Fluoride fiber mixes Dy3+Fluoride fiber；If the first rare earth ion doped optical fiber (4) is to mix Ho3+Fluoride fiber is then
Second rare earth ion doped optical fiber (10) is to mix Dy3+Fluoride fiber；If the first rare earth ion doped optical fiber (4) is to mix Dy3+Fluorine
Then the second rare earth ion doped optical fiber (10) is to mix Ho to compound optical fiber3+Fluoride fiber；Third rare earth ion doped optical fiber (17)
For low concentration Er3+Doped fluoride optical fiber；It is described to mix Ho3+Fluoride fiber corresponds to the pump that generation wavelength is located at 1150nm laser
Pu source；It is described to mix Dy3+Fluoride fiber corresponds to the pumping source that generation wavelength is located at 2800nm laser.
Further, when the feedback wave-length coverage that above-mentioned plane diffraction grating (6) provides is 2.8~3.0 μm, by mixing
Ho3+Particle in the rare earth ion doped optical fiber of fluoride5I6→5I7Energy level transition provides gain and signal laser exports；Plane
When the feedback wave-length coverage that diffraction grating (6) provides is 3~3.35 μm, by mixing Dy3+Grain in fluoride rare earth ion doped optical fiber
Son6H13/2→6H15/2Energy level transition provides gain and signal laser exports；The feedback wavelength model that plane diffraction grating (6) provides
It encloses when being 3.35~4.0 μm, by mixing Er3+Particle in fluoride rare earth ion doped optical fiber4F9/2→4I9/2Energy level transition provides
Gain and signal laser export.
Further, after above-mentioned first dichroic mirror (2) is connected to first laser pumping source (1), the second dichroic mirror (8) is even
It connects after second laser pumping source (7), after the 4th dichroic mirror (15) is connected to third dichroic mirror (14)；First dichroic mirror (2) is right
The laser that first laser pumping source (1) issues is high thoroughly, and high to the first signal laser anti-, the second dichroic mirror (8) is to the second pumping source
(7) laser issued is high thoroughly, and high to second signal laser anti-, the 4th dichroic mirror (15) is to third laser pumping source (12) and the 4th
The laser that laser pumping source (13) issues is high thoroughly, high to third signal laser anti-.
Further, total reflection mirror (19) are connected in the optical path of the first dichroic mirror (2) coupling output described above, second
Dichroic mirror (8) couples and connects the 5th dichroic mirror (20) on output light path, connects the on the 4th dichroic mirror (15) coupling output light path
Six dichroic mirrors (21), total reflection mirror (19), the 5th dichroic mirror (20) and the 6th dichroic mirror (21) are sequentially connected；Total reflection mirror (19)
For reflecting the first signal laser of the first rare earth ion doped optical fiber (4) generation, the 5th dichroic mirror (20) is used for dilute to first
Native ion-doped optical fiber (4) generates the second letter that the first signal laser is high thoroughly, generates to the second rare earth ion doped optical fiber (10)
Number laser is high anti-(10), and the 6th dichroic mirror (21) is used to generate first to the first and second rare earth ion doped optical fibers (4 and 10)
It is high thoroughly with second signal laser, it is high anti-that third signal laser is generated to third rare earth ion doped optical fiber (17).
The invention also discloses a kind of operating method of the mid-infrared fiber laser device of ultra wide band continuously adjustable,
It specifically includes the following contents: being to be placed by adjusting with littrow type structure when at least one laser pumping source is turned on
The angle of plane diffraction grating (6) realizes the wavelength tuning of output optical fibre laser, wherein the laser pumping source are as follows: first laser
Pumping source (1), second laser pumping source (7), third laser pumping source (12) and the 4th laser pumping source (13).
Further, the tuning band of user according to actual needs in aforesaid operations method, increases or decreases laser system
Laser pumping source in system increases or decreases resonant cavity number included in laser system.
By using above technical solution, the beneficial effects of the present invention are: the present invention proposes that a kind of ultra wide band continuously may be used
The mid-infrared fiber laser and operating method of tuning, by three kinds of different rare earth ion doped optical fibers in parallel, use is compound
Formula cavity resonator structure realizes that 2.8~4 μ m wavelength ranges continuously may be used using same plane diffraction grating as wavelength tuning device
The mid-infrared light fibre laser of tuning exports, and solves existing single-chamber type mid-infrared fiber laser tuning band restricted gender and difficulty
To realize the problem of broadband wavelength all standing continuous tuning；The program has excellent expansibility simultaneously, since parallel connection is propped up
Road is independent of each other, and parallel branch can be adjusted flexibly according to actual wavelength demand；Apparatus structure is simple, portable and open up
Malleability is strong.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is the structural schematic diagram of the mid-infrared fiber laser of ultra wide band continuously adjustable of the present invention.
Specific embodiment
The embodiment of the present invention solves existing by providing a kind of mid-infrared fiber laser of ultra wide band continuously adjustable
The tuning range of technology medium wavelength tunable mid-infrared light fibre laser is narrow, conventional tunable mid-infrared fiber laser can not be
Infrared 3~4 mu m waveband wavelength all standing in realizing in one laser system, wavelength cannot flexible adjustable problems.
In order to solve the above-mentioned technical problem, in conjunction with appended figures and specific embodiments to above-mentioned technology
Scheme is described in detail.
The mid-infrared fiber laser device of ultra wide band continuously adjustable provided by the invention, as shown in Figure 1, including first
Laser pumping source (1), the first dichroic mirror (2), the first plano-convex lens (3), the first rare earth ion doped optical fiber (4), the second plano-convex
Lens (5), plane diffraction grating (6), second laser pumping source (7), the second dichroic mirror (8), third plano-convex lens (9), second
Rare earth ion doped optical fiber (10), the 4th plano-convex lens (11), third laser pumping source (12), the 4th laser pumping source (13),
Third dichroic mirror (14), the 4th dichroic mirror (15), the 5th plano-convex lens (16), third rare earth ion doped optical fiber (17), the 6th
Plano-convex lens (18), total reflection mirror (19), the 5th dichroic mirror (20) and the 6th dichroic mirror (21).
It is saturating that along optical output direction the first dichroic mirror (2), the first plano-convex are sequentially connected after the first laser pumping source (1)
Mirror (3), the first rare earth ion doped optical fiber (4), the second plano-convex lens (5) and plane diffraction grating (6)；The second laser pump
The second dichroic mirror (8), third plano-convex lens (9), second rare earth ion doped is sequentially connected along optical output direction behind Pu source (7)
Optical fiber (10), the 4th plano-convex lens (11) and plane diffraction grating (6)；The third laser pumping source (12) and the 4th laser pump
Third dichroic mirror (14), the 4th dichroic mirror (15), the 5th plano-convex lens are sequentially connected along optical output direction behind Pu source (13)
(16), third rare earth ion doped optical fiber (17), the 6th plano-convex lens (18) and plane diffraction grating (6).
The laser that the first laser pumping source (1) generates passes through the first plano-convex lens after the first dichroic mirror (2) is high thoroughly
(3) it is coupled into the first rare earth ion doped optical fiber (4), the first signal laser of the first rare earth ion doped optical fiber (4) output
It is incident on plane diffraction grating (6) after the second plano-convex lens (5) collimation, the first signal laser is through plane diffraction grating (6)
It feeds back in the first resonant cavity, the first signal that output is vibrated in the first resonant cavity leads to after the first plano-convex lens (3) collimation
Cross the first dichroic mirror (2) coupling output；The laser that the second laser pumping source (7) generates is after the second dichroic mirror (8) is high thoroughly
It is coupled into the second rare earth ion doped optical fiber (10) by third plano-convex lens (9), the second rare earth ion doped optical fiber (10)
The second signal laser of output through the 4th plano-convex lens (11) collimated incident on plane diffraction grating (6), second signal laser
It is fed back in the second resonant cavity through plane diffraction grating (6), the second signal laser of output is vibrated in the second resonant cavity through
Pass through the second dichroic mirror (8) coupling output after three plano-convex lens (9) collimation；The third laser pumping source (12) and the 4th laser
The laser that pumping source (13) generates closes beam through third dichroic mirror (14), and it is dilute to be then coupled into third through the 5th plano-convex lens (16)
Native ion-doped optical fiber (17), the third signal laser of third rare earth ion doped optical fiber (17) output is through the 6th plano-convex lens
(18) it is incident on plane diffraction grating (6) after collimating, third signal laser feeds back to third resonance through plane diffraction grating (6)
In chamber, the third signal laser that output is vibrated in third resonant cavity passes through the four or two color after the 5th plano-convex lens (16) collimation
Mirror (15) coupling output.
The laser after the second plano-convex lens (5), the 4th plano-convex lens (11) and the 5th plano-convex lens (16) collimation
Light beam is parallel to each other, i.e. three beams of laser light beam and the angle of plane diffraction grating (6) is consistent, such plane diffraction grating
(6) feedback of phase co-wavelength can be provided for three resonant cavities simultaneously, and Plane of rotation diffraction grating (6) can be simultaneously to three resonance
The signal light wavelength of chamber is tuned.
First rare earth ion doped optical fiber (4), the second rare earth ion doped optical fiber (10) and third rare earth ion are mixed
Veiling glare fibre (17) is in optical fiber front end vertical cut, the angle beveling of 8 degree of rear end；First resonant cavity, the second resonant cavity and third resonant cavity
The Fresnel reflection and plane diffraction grating (6) provided by rare earth ion doped optical fiber (4,10,17) front end vertical cut is constituted,
Middle plane diffraction grating (6) is with the placement of littrow type structure；The angle beveling of 8 degree of the rear end is swashing for rear end output in order to prevent
Light generates Fresnel reflection.
The plane diffraction grating (6) is with the placement of littrow type structure, for adjusting to first to third signal laser
It is humorous.
First dichroic mirror (2) is connected between first laser pumping source (1) and the first plano-convex lens (3), and the two or two
Look mirror (8) is connected between second laser pumping source (7) and third plano-convex lens (9), and the 4th dichroic mirror (15) is connected to third
Between dichroic mirror (14) and the 5th plano-convex lens (16)；The laser that first dichroic mirror (2) issues first laser pumping source (1) is high
Thoroughly, high to the first signal laser anti-, the laser that the second dichroic mirror (8) issues the second pumping source (7) is high thoroughly, swashs to second signal
Light is high anti-, and the laser that the 4th dichroic mirror (15) issues third laser pumping source (12) and the 4th laser pumping source (13) is high thoroughly,
It is high to third signal laser anti-.
It when at least one described laser pumping source is turned on, is realized by the continuous rotation of plane diffraction grating (6)
The all band continuous wavelength tuning of 2.8~4 μm of optical-fiber lasers of output, wherein the plane diffraction grating (6) is with littrow type knot
Structure is placed, wherein the laser pumping source are as follows: first laser pumping source (1), second laser pumping source (7), third laser pump (ing)
Source (12) and the 4th laser pumping source (13).
Further, the total reflection mirror (19), the 5th dichroic mirror (20) and the 6th dichroic mirror (21) are individually being opened
First laser pumping source (1) individually opens second laser pumping source (7), individually opens third laser pumping source (12) and the 4th
It is inessential structure when laser pumping source (13).
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract), unless specifically stated,
It is replaced by other equivalent or with similar purpose alternative features.That is, unless specifically stated, each feature is a series of
An example in equivalent or similar characteristics.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (9)
1. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable, it is characterised in that: the laser includes first sharp
It is optical pumping source (1), the first rare earth ion doped optical fiber (4), plane diffraction grating (6), second laser pumping source (7), second dilute
Native ion-doped optical fiber (10), third laser pumping source (12), the 4th laser pumping source (13) and the rare earth ion doped light of third
Fine (17)；First rare earth ion doped optical fiber (4) and the second rare earth ion doped optical fiber (10) are to mix Ho3+It is fluorinated object light
Fibre mixes Dy3+Fluoride fiber；If the first rare earth ion doped optical fiber (4) is to mix Ho3+Fluoride fiber then the second rare earth ion
Doped fiber (10) is to mix Dy3+Fluoride fiber；If the first rare earth ion doped optical fiber (4) is to mix Dy3+Fluoride fiber then
Two rare earth ion doped optical fibers (10) are to mix Ho3+Fluoride fiber；Third rare earth ion doped optical fiber (17) is low concentration Er3+
Doped fluoride optical fiber；The mid-infrared fiber laser three kinds of different rare earth ion doped optical fibers in parallel, using combined type
Cavity resonator structure realizes that 2.8~4 μ m wavelength ranges are continuously adjustable using same plane diffraction grating as wavelength tuning device
Humorous mid-infrared light fibre laser output.
2. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 1, it is characterised in that: institute
It states first laser pumping source (1) and is sequentially connected the first rare earth ion doped optical fiber (4) and plane diffraction light along optical output direction
Grid (6)；The second laser pumping source (7) is sequentially connected the second rare earth ion doped optical fiber (10) peace along optical output direction
Face diffraction grating (6)；Output side after the sharp combiner of the third laser pumping source (12) and the 4th laser pumping source (13)
To being sequentially connected third rare earth ion doped optical fiber (17) and plane diffraction grating (6).
3. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 2, it is characterised in that: institute
The laser coupled of first laser pumping source (1) generation is stated into the first rare earth ion doped optical fiber (4), first is rare earth ion doped
It is incident on plane diffraction grating (6) after the first signal laser collimation of optical fiber (4) output, the first signal laser is through planar diffraction
Grating (6) is fed back in the first resonant cavity, and the first signal that output is vibrated in the first resonant cavity is collimated by the one or two color
Mirror (2) coupling output；The laser coupled that second laser pumping source (7) generates is into the second rare earth ion doped optical fiber (10), and the
The second signal laser of two rare earth ion doped optical fibers (10) output is collimated to be incident on plane diffraction grating (6), the second letter
Number laser is fed back in the second resonant cavity through plane diffraction grating (6), and the second signal that output is vibrated in the second resonant cavity swashs
Collimated coupled by the second dichroic mirror (8) of light exports；Third laser pumping source (12) and the 4th laser pumping source (13) produce
Raw laser through third dichroic mirror (14) close beam, be then coupled into third rare earth ion doped optical fiber (17), third rare earth from
The third signal laser of sub- doped fiber (17) output is collimated to be incident on plane diffraction grating (6), third signal laser
It is fed back in third resonant cavity through plane diffraction grating (6), the third signal laser of output is vibrated in third resonant cavity through standard
Pass through the coupling output of the 4th dichroic mirror (15) after straight.
4. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 3, it is characterised in that: the
One laser pumping source (1) and second laser pumping source (7) are located at the pumping laser of 1150nm or 2800nm for generation wavelength；The
Three laser pumping sources (12) and the 4th laser pumping source (13) are located at the pumping laser of 1973nm or 976nm for generation wavelength；
Wherein, if third laser pumping source (12) is located at the pumping laser of 1973nm, the 4th laser pumping source for generation wavelength
(13) it is located at the pumping laser of 976nm for generation wavelength；If third laser pumping source (12) is located at 976nm for generation wavelength
Pumping laser, then the 4th laser pumping source (13) is located at the pumping laser of 1973nm for generation wavelength.
5. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 3, it is characterised in that: institute
State the first rare earth ion doped optical fiber (4), the second rare earth ion doped optical fiber (10) and third rare earth ion doped optical fiber (17)
In optical fiber front end vertical cut, the angle beveling of 8 degree of rear end；First resonant cavity, the second resonant cavity and third resonant cavity by rare earth from
The Fresnel reflection and plane diffraction grating (6) that sub- doped fiber (4,10,17) front end vertical cut provides are constituted, wherein plane is spread out
Grating (6) is penetrated with the placement of littrow type structure.
6. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 3, it is characterised in that:
First rare earth ion doped optical fiber (4) generation wavelength is located at 2.8~3.0 μm or 3~3.35 μm of the first signal laser；Second is dilute
Native ion-doped optical fiber (10) generation wavelength is located at 2.8~3.0 μm or 3~3.35 μm of second signal laser；Third rare earth from
Sub- doped fiber (17) generation wavelength is located at 3.35~4.0 μm of third signal laser.
7. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 3, it is characterised in that: institute
It states after the first dichroic mirror (2) is connected to first laser pumping source (1), the second dichroic mirror (8) is connected to second laser pumping source (7)
Afterwards, after the 4th dichroic mirror (15) is connected to third dichroic mirror (14)；First dichroic mirror (2) issues first laser pumping source (1)
Laser it is high thoroughly, high to the first signal laser anti-, the laser that the second dichroic mirror (8) issues the second pumping source (7) is high saturating, to the
Binary signal laser is high anti-, and the 4th dichroic mirror (15) swashs third laser pumping source (12) and the 4th laser pumping source (13) sending
Light is high thoroughly, high to third signal laser anti-.
8. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 7, it is characterised in that: institute
It states and connects total reflection mirror (19) in the optical path of the first dichroic mirror (2) coupling output, connect on the second dichroic mirror (8) coupling output light path
The 5th dichroic mirror (20) is connect, the 4th dichroic mirror (15) couples and connects the 6th dichroic mirror (21) on output light path, total reflection mirror (19),
5th dichroic mirror (20) and the 6th dichroic mirror (21) are sequentially connected；Total reflection mirror (19) is for reflecting the first rare earth ion doped light
The first signal laser that fine (4) generate, the 5th dichroic mirror (20) are used to generate the first rare earth ion doped optical fiber (4) in the first letter
Number laser is high thoroughly, and the second signal laser generated to the second rare earth ion doped optical fiber (10) is high anti-(10), the 6th dichroic mirror
(21) for the first rare earth ion doped optical fiber (4) and the second rare earth ion doped optical fiber (10) generate the first signal laser with
Second signal laser is high thoroughly, and it is high anti-to generate third signal laser to third rare earth ion doped optical fiber (17).
9. the method for obtaining ultra wide band continuously adjustable laser using laser described in claim 1 to 8 any one, feature
It is: is by adjusting the plane diffraction grating placed with littrow type structure when at least one laser pumping source is turned on
(6) angle realizes the wavelength tuning of output optical fibre laser, wherein the laser pumping source are as follows: first laser pumping source (1), the
Dual-laser pumping source (7), third laser pumping source (12) and the 4th laser pumping source (13).
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| CN110165529B (en) * | 2019-06-05 | 2020-06-23 | 四川大学 | Three-band same-repetition-frequency wavelength-tunable mid-infrared fiber laser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6606332B1 (en) * | 2000-11-01 | 2003-08-12 | Bogie Boscha | Method and apparatus of color mixing in a laser diode system |
| CN105161968A (en) * | 2015-09-22 | 2015-12-16 | 电子科技大学 | Graphene-based mid-infrared dual-wavelength co-repetition frequency pulsed fiber laser |
| CN106058624A (en) * | 2016-06-29 | 2016-10-26 | 电子科技大学 | Tunable gain-control intermediate infrared pulse fiber laser and method for obtaining laser |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6606332B1 (en) * | 2000-11-01 | 2003-08-12 | Bogie Boscha | Method and apparatus of color mixing in a laser diode system |
| CN105161968A (en) * | 2015-09-22 | 2015-12-16 | 电子科技大学 | Graphene-based mid-infrared dual-wavelength co-repetition frequency pulsed fiber laser |
| CN106058624A (en) * | 2016-06-29 | 2016-10-26 | 电子科技大学 | Tunable gain-control intermediate infrared pulse fiber laser and method for obtaining laser |
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