CN107302174A - The mid-infrared fiber laser and operating method of a kind of ultra wide band continuously adjustable - Google Patents
The mid-infrared fiber laser and operating method of a kind of ultra wide band continuously adjustable Download PDFInfo
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- CN107302174A CN107302174A CN201710694417.6A CN201710694417A CN107302174A CN 107302174 A CN107302174 A CN 107302174A CN 201710694417 A CN201710694417 A CN 201710694417A CN 107302174 A CN107302174 A CN 107302174A
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- 239000000835 fiber Substances 0.000 title claims abstract description 51
- 238000011017 operating method Methods 0.000 title abstract description 6
- 238000005086 pumping Methods 0.000 claims abstract description 110
- 239000013307 optical fiber Substances 0.000 claims abstract description 94
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 77
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 150000002910 rare earth metals Chemical class 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- -1 rare earth ion Chemical class 0.000 description 47
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 150000001875 compounds Chemical class 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
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method 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
- 230000035800 maturation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009738 saturating 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
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
-
- 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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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of mid-infrared fiber laser of ultra wide band continuously adjustable and operating method, 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), 3rd laser pumping source (12), 4th laser pumping source (13) and the 3rd rare earth ion doped optical fiber (17), pass through three kinds of different rare earth ion doped optical fibers in parallel, wavelength tuning device is used as by the use of same plane diffraction grating, realize the middle infrared optical fiber laser output of 2.8~4 μ m wavelength range continuously adjustables, solve existing single-chamber type mid-infrared fiber laser tuning band restricted gender and be difficult to the problem of broadband wavelength all standing continuous tuning；The program has excellent expansibility simultaneously, because parallel branch is independent of each other, parallel branch can be adjusted flexibly according to actual wavelength demand；Apparatus structure is simple, and portable and expansion is strong.
Description
Technical field
The present invention relates to mid-infrared laser technical field, more particularly to a kind of middle infrared optical fiber of ultra wide band continuously adjustable
Laser.
Background technology
3~5 μm of middle-infrared bands are in important propagation in atmosphere window, while also covers the suction of numerous important chemical bonds
Peak is received, the field such as the laser that wavelength is located at this wave band is handed in space optical communication, biologic medical, material, detection of gas all has
There is important application value.
Optical fiber laser is as a kind of new laser type, compared to conventional laser such as:Solid state laser, gas laser
Device, semiconductor laser etc., with transformation efficiency height, good beam quality, excellent heat radiation performance, a series of advantages such as are easily integrated, closely
Turn into domestic and international study hotspot over a little years.Wherein, mid-infrared fiber laser is even more because its huge application prospect is obtained
The concern and favor of numerous researchers.The operation wavelength of the more mid-infrared fiber laser of maturation is also focused at present
2.8~2.9 mu m wavebands, gradually extend 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 as gain media, and the optical-fiber laser for realizing 3.34 μm by single order Raman is exported；Then, they are to laser
Device resonator is optimized, and by second order Raman frequency shift, realizes 3.77 μm of optical-fiber laser output；, the big profit of Australia in 2014
Sub- University of Adelaide Ori Henderson-Sapir et al. mix Er using the pumping simultaneously of 985nm and 1973nm dual wavelengths3+Fluorination
Object light is fine, realizes 3.604 μm of optical-fiber laser output, is expanded for middle infrared optical fiber optical maser wavelength and provide new method；With
Laser output power lifting is arrived 1.5W by Canada Université Laval Vincent Fortin et al. 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 is operated in single wavelength state, by contrast, infrared in tunable wave length
Optical fiber laser will meet more application demands, with bigger application value in actual applications.
2016, Adelaide, AUS university Ori Henderson-Sapir et al. were in 980nm and 1973nm double waves
That grows pumping simultaneously mixes Er3+3.33 μm~3.78 μm (450nm) optical-fiber laser broadbands are realized in fluoride fiber laser can
Tuning；The same year Australia Macquarie University Matthew R.Majewski et al. mix 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 is connected, and is led to
Cross plane balzed grating, and carry out the new method that the output of 3 μm~3.8 mum wavelength tunable fiber laser is realized in wavelength selection.Due to not
With the mutually overlapping and influence of energy level absorption/transmitting band between rare earth ion doped optical fiber, want 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 that 2.95~3.35 mum wavelengths are interval and 3.33 μm~3.78 mum wavelengths are interval respectively
Tunable optical-fiber laser output, tuning range is limited, limits its practical application.
There is not yet a fiber laser system at present, the adjustable of 3~4 μm of middle-infrared band scopes of wide scope can be realized
Humorous laser is exported, if desired wavelength switching, then needs the laser of many different output wavelengths, complicated, expensive and shortage is flexibly
Property, controllability.
The content of the invention
The above mentioned problem existed for fiber laser system of 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 laser of ultra wide band continuously adjustable, it specifically includes 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), the 3rd laser pumping source (12), the 4th laser pumping source (13) and the 3rd rare earth ion doped optical fiber
(17)。
Further, above-mentioned first laser pumping source (1) is sequentially connected the first rare earth ion along light path outbound course and mixed
Veiling glare fibre (4) and plane diffraction grating (6)；Second laser pumping source (7) along light path outbound course be sequentially connected the second rare earth from
Sub- doped fiber (10) and plane diffraction grating (6)；The laser of 3rd laser pumping source (12) and the 4th laser pumping source (13)
Close the outbound course after beam and be sequentially connected the 3rd rare earth ion doped optical fiber (17) and plane diffraction grating (6).
Further, the laser coupled that above-mentioned first laser pumping source (1) produces enters the first rare earth ion doped optical fiber
(4) in, it is incident on after the first signal laser collimation of the first rare earth ion doped optical fiber (4) output on plane diffraction grating (6),
First signal laser is fed back in the first resonator through plane diffraction grating (6), and the first of output is vibrated in the first resonator
Collimated coupled by the first dichroic mirror (2) of signal exports；The laser coupled that second laser pumping source (7) is produced enters the second rare earth
In ion-doped optical fiber (10), the secondary signal laser of the second rare earth ion doped optical fiber (10) output is collimated to be incident on plane
On diffraction grating (6), secondary signal laser is fed back in the second resonator through plane diffraction grating (6), in the second resonator
Collimated coupled by the second dichroic mirror (8) of secondary signal laser for vibrating output exports；3rd laser pumping source (12) and
The laser that 4th laser pumping source (13) is produced closes beam through the 3rd dichroic mirror (14), is then coupled into the 3rd rare earth ion doped
Optical fiber (17), the 3rd signal laser of the 3rd rare earth ion doped optical fiber (17) output is collimated to be incident on plane diffraction grating
(6) on, the 3rd signal laser is fed back in the 3rd resonator through plane diffraction grating (6), and output is vibrated in the 3rd resonator
The 3rd 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 producing wavelength
1150nm or 2800nm pumping laser；3rd laser pumping source (12) and the 4th laser pumping source (13) are used to produce wavelength position
In 1973nm or 976nm pumping laser；Wherein, if the 3rd laser pumping source (12) is used to produce the pump that wavelength is located at 1973nm
Pu laser, then the 4th laser pumping source (13) is for producing pumping laser of the wavelength positioned at 976nm；If the 3rd laser pumping source
(12) it is used to produce the pumping laser that wavelength is located at 976nm, then the 4th laser pumping source (13) is located at for producing wavelength
1973nm pumping laser.
Further, above-mentioned first rare earth ion doped optical fiber (4), the second rare earth ion doped optical fiber (10) and the 3rd
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 resonator, the second resonator and
Fresnel reflection and plane diffraction grating that 3rd resonator is provided by rare earth ion doped optical fiber (4,10,17) front end vertical cut
(6) constitute, wherein, plane diffraction grating (6) is placed with littrow types structure.
Further, above-mentioned first rare earth ion doped optical fiber (4) produces wavelength positioned at 2.8~3.0 μm or 3~3.35
μm the first signal laser；Second rare earth ion doped optical fiber (10) produces wavelength and is located at 2.8~3.0 μm or 3~3.35 μm
Secondary signal laser；3rd rare earth ion doped optical fiber (17) produces the 3rd signal laser that wavelength is located at 3.35~4.0 μm.
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；3rd rare earth ion doped optical fiber (17)
For low concentration Er3+Doped fluoride optical fiber；It is described to mix Ho3+Fluoride fiber correspondence produces the pump that wavelength is located at 1150nm laser
Pu source；It is described to mix Dy3+Fluoride fiber correspondence produces the pumping source that 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 exported with signal laser；Plane
When the feedback wave-length coverage that diffraction grating (6) is provided 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 exported with signal laser；The feedback wavelength model that plane diffraction grating (6) is provided
Enclose for 3.35~4.0 μm when, by mixing Er3+Particle in fluoride rare earth ion doped optical fiber4F9/2→4I9/2Energy level transition is provided
Gain is exported with signal laser.
Further, above-mentioned first dichroic mirror (2) is connected to after first laser pumping source (1), and the second dichroic mirror (8) is even
It is connected on after second laser pumping source (7), the 4th dichroic mirror (15) is connected to after the 3rd dichroic mirror (14)；First dichroic mirror (2) is right
The laser that first laser pumping source (1) is sent is high thoroughly, and high to the first signal laser anti-, the second dichroic mirror (8) is to the second pumping source
(7) laser sent is high thoroughly, and high to secondary signal laser anti-, the 4th dichroic mirror (15) is to the 3rd laser pumping source (12) and the 4th
The laser that laser pumping source (13) is sent is high thoroughly, high to the 3rd signal laser anti-.
Further, connection completely reflecting mirror (19), second in the light path of the first dichroic mirror (2) coupling output described above
Connected on dichroic mirror (8) coupling output light path and connect the on the 5th dichroic mirror (20), the 4th dichroic mirror (15) coupling output light path
Six dichroic mirrors (21), completely reflecting mirror (19), the 5th dichroic mirror (20) and the 6th dichroic mirror (21) are sequentially connected；Completely reflecting mirror (19)
For reflecting the first signal laser that the first rare earth ion doped optical fiber (4) is produced, the 5th dichroic mirror (20) is used for dilute to first
Native ion-doped optical fiber (4) produces the second letter that the first signal laser is high thoroughly, is produced 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 produce first to the first and second rare earth ion doped optical fibers (4 and 10)
It is high thoroughly with secondary signal laser, the 3rd signal laser is produced to the 3rd rare earth ion doped optical fiber (17) high anti-.
The invention also discloses a kind of operating method of the mid-infrared fiber laser device of ultra wide band continuously adjustable, its
Specifically include herein below：It is to be placed by adjusting with littrow types structure when at least one laser pumping source is unlocked
The angle of plane diffraction grating (6) realizes the wavelength tuning of output optical fibre laser, wherein the laser pumping source is：First laser
Pumping source (1), second laser pumping source (7), the 3rd 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, that is, increase or decrease the resonator number included in laser system.
Technical scheme more than, the beneficial effects of the invention are as follows：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, using compound
Formula cavity resonator structure, by the use of same plane diffraction grating as wavelength tuning device, realizes that 2.8~4 μ m wavelength ranges continuously may be used
The middle infrared optical fiber laser output of tuning, 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, due to parallel connection branch
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.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the structural representation of the mid-infrared fiber laser of ultra wide band continuously adjustable of the present invention.
Embodiment
The embodiment of the present invention is solved 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
The problem of infrared 3~4 mu m waveband wavelength all standing, wavelength can not be flexibly adjustable in being realized in one laser system.
In order to solve the above-mentioned technical problem, below in conjunction with Figure of description and specific embodiment to above-mentioned technology
Scheme is described in detail.
The mid-infrared fiber laser device for the ultra wide band continuously adjustable that the present invention is provided, as shown in figure 1, including first
Laser pumping source (1), the first dichroic mirror (2), the first planoconvex spotlight (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), the 3rd planoconvex spotlight (9), second
Rare earth ion doped optical fiber (10), the 4th planoconvex spotlight (11), the 3rd laser pumping source (12), the 4th laser pumping source (13),
3rd dichroic mirror (14), the 4th dichroic mirror (15), the 5th planoconvex spotlight (16), the 3rd rare earth ion doped optical fiber (17), the 6th
Planoconvex spotlight (18), completely reflecting mirror (19), the 5th dichroic mirror (20) and the 6th dichroic mirror (21).
It is saturating that along light path outbound course 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 planoconvex spotlight (5) and plane diffraction grating (6)；The second laser pump
Be sequentially connected the second dichroic mirror (8) along light path outbound course behind Pu source (7), it is the 3rd planoconvex spotlight (9), second rare earth ion doped
Optical fiber (10), the 4th planoconvex spotlight (11) and plane diffraction grating (6)；3rd laser pumping source (12) and the 4th laser pump
Behind Pu source (13) the 3rd dichroic mirror (14), the 4th dichroic mirror (15), the 5th planoconvex spotlight are sequentially connected along light path outbound course
(16), the 3rd rare earth ion doped optical fiber (17), the 6th planoconvex spotlight (18) and plane diffraction grating (6).
The laser that the first laser pumping source (1) produces through the first dichroic mirror (2) it is high thoroughly after pass through the first planoconvex spotlight
(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 after being collimated through the second planoconvex spotlight (5) on plane diffraction grating (6), the first signal laser is through plane diffraction grating (6)
Feed back in the first resonator, the first signal that output is vibrated in the first resonator leads to after the first planoconvex spotlight (3) collimation
Cross the first dichroic mirror (2) coupling output；The laser that the second laser pumping source (7) produces through the second dichroic mirror (8) it is high thoroughly after
It is coupled into by the 3rd planoconvex spotlight (9) in the second rare earth ion doped optical fiber (10), the second rare earth ion doped optical fiber (10)
The secondary signal laser of output through the 4th planoconvex spotlight (11) collimated incident on plane diffraction grating (6), secondary signal laser
Fed back to through plane diffraction grating (6) in the second resonator, the secondary signal laser of output is vibrated in the second resonator through
Coupled and exported by the second dichroic mirror (8) after three planoconvex spotlights (9) collimation；3rd laser pumping source (12) and the 4th laser
The laser that pumping source (13) is produced closes beam through the 3rd dichroic mirror (14), is then coupled into the 3rd through the 5th planoconvex spotlight (16) dilute
Native ion-doped optical fiber (17), the 3rd signal laser of the 3rd rare earth ion doped optical fiber (17) output is through the 6th planoconvex spotlight
(18) it is incident on after collimating on plane diffraction grating (6), the 3rd signal laser feeds back to the 3rd resonance through plane diffraction grating (6)
In chamber, vibrated in the 3rd resonator after the 3rd signal laser of output is collimated through the 5th planoconvex spotlight (16) by the four or two color
Mirror (15) coupling output.
Laser after the collimation through the second planoconvex spotlight (5), the 4th planoconvex spotlight (11) and the 5th planoconvex spotlight (16)
Light beam is parallel to each other, i.e. the angle of three beams of laser light beam and plane diffraction grating (6) is consistent, such plane diffraction grating
(6) feedback of phase co-wavelength can be provided for three resonators 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 the 3rd 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 resonator, the second resonator and the 3rd resonator
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, its
Midplane diffraction grating (6) is placed with littrow types structure；The angles beveling of 8 degree of the rear end is to prevent what rear end from exporting to swash
Light produces Fresnel reflection.
The plane diffraction grating (6) is placed with littrow types structure, for being adjusted to the first to the 3rd signal laser
It is humorous.
First dichroic mirror (2) is connected between first laser pumping source (1) and the first planoconvex spotlight (3), and the two or two
Look mirror (8) is connected between second laser pumping source (7) and the 3rd planoconvex spotlight (9), and the 4th dichroic mirror (15) is connected to the 3rd
Between dichroic mirror (14) and the 5th planoconvex spotlight (16)；The laser that first dichroic mirror (2) is sent to first laser pumping source (1) is high
Thoroughly, high to the first signal laser anti-, the laser that the second dichroic mirror (8) is sent to the second pumping source (7) is high thoroughly, and secondary signal is swashed
Light is high anti-, and the laser that the 4th dichroic mirror (15) is sent to the 3rd laser pumping source (12) and the 4th laser pumping source (13) is high thoroughly,
It is high to the 3rd signal laser anti-.
When at least one described laser pumping source is unlocked, 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 knots
Structure is placed, wherein the laser pumping source is：First laser pumping source (1), second laser pumping source (7), the 3rd laser pump (ing)
Source (12) and the 4th laser pumping source (13).
Further, the completely reflecting mirror (19), the 5th dichroic mirror (20) and the 6th dichroic mirror (21) are individually being opened
First laser pumping source (1), individually unlatching second laser pumping source (7), individually unlatching the 3rd laser pumping source (12) and the 4th
It is inessential structure during laser pumping source (13).
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, summary), unless specifically stated otherwise,
Replaced by other equivalent or with similar purpose alternative features.I.e., unless specifically stated otherwise, each feature is a series of
An example in equivalent or similar characteristics.
The invention is not limited in foregoing embodiment.The present invention, which is expanded to, any in this manual to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (10)
1. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable, it is characterised in that：The laser includes first and swashed
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), the 3rd laser pumping source (12), the 4th laser pumping source (13) and the 3rd rare earth ion doped light
Fine (17).
2. a kind of mid-infrared fiber laser of ultra wide band continuously adjustable according to claim 1, it is characterised in that：Institute
State first laser pumping source（1）The first rare earth ion doped optical fiber (4) and plane diffraction light are sequentially connected along light path outbound course
Grid (6)；The second laser pumping source (7) is sequentially connected the second rare earth ion doped optical fiber (10) peace along light path outbound course
Face diffraction grating (6)；Output side after the sharp combiner of 3rd laser pumping source (12) and the 4th laser pumping source (13)
To being sequentially connected the 3rd 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
State first laser pumping source（1）The laser coupled of generation is entered in the first rare earth ion doped optical fiber (4), and first is rare earth ion doped
It is incident on after the first signal laser collimation of optical fiber (4) output on plane diffraction grating (6), the first signal laser is through planar diffraction
Grating (6) is fed back in the first resonator, and the first signal that output is vibrated in the first resonator is collimated by the one or two color
Mirror（2）Coupling output；The laser coupled that second laser pumping source (7) is produced is entered in the second rare earth ion doped optical fiber (10), the
The secondary 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 resonator through plane diffraction grating (6), and the secondary signal that output is vibrated in the second resonator swashs
Light is collimated to pass through the second dichroic mirror（8）Coupling output；3rd laser pumping source (12) and the production of the 4th laser pumping source (13)
Raw laser is through the 3rd dichroic mirror（14）Close beam, be then coupled into the 3rd rare earth ion doped optical fiber (17), the 3rd rare earth from
3rd signal laser of sub- doped fiber (17) output is collimated to be incident on plane diffraction grating (6), the 3rd signal laser
Fed back to through plane diffraction grating (6) in the 3rd resonator, the 3rd signal laser of output is vibrated in the 3rd resonator through standard
Pass through the 4th dichroic mirror after straight（15）Coupling output.
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）With second laser pumping source（7）It is located at 1150nm or 2800nm pumping laser for producing wavelength；The
Three laser pumping sources（12）With the 4th laser pumping source（13）It is located at 1973nm or 976nm pumping laser for producing wavelength；
Wherein, if the 3rd laser pumping source（12）It is located at 1973nm pumping laser for producing wavelength, then the 4th laser pumping source
（13）It is located at 976nm pumping laser for producing wavelength；If the 3rd laser pumping source（12）For producing wavelength positioned at 976nm
Pumping laser, then the 4th laser pumping source（13）It is located at 1973nm pumping laser for producing 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）With the 3rd rare earth ion doped optical fiber（17）
In optical fiber front end vertical cut, the angle beveling of 8 degree of rear end；First resonator, the second resonator and the 3rd resonator by rare earth from
Sub- doped fiber（4、10、17）The Fresnel reflection and plane diffraction grating (6) that front end vertical cut is provided are constituted, wherein, plane is spread out
Grating (6) is penetrated to place with littrow types 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）Produce the first signal laser that wavelength is located at 2.8~3.0 μm or 3~3.35 μm；Second is dilute
Native ion-doped optical fiber（10）Produce the secondary signal laser that wavelength is located at 2.8~3.0 μm or 3~3.35 μm；3rd rare earth from
Sub- doped fiber（17）Produce the 3rd signal laser that wavelength is located at 3.35~4.0 μm.
7. 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 dichroic mirror（2）It is connected to after first laser pumping source (1), the second dichroic mirror（8）It is connected to second laser pumping source (7)
Afterwards, the 4th dichroic mirror（15）It is connected to the 3rd dichroic mirror（14）Afterwards；First dichroic mirror（2）To first laser pumping source（1）Send
Laser it is high thoroughly, high to the first signal laser anti-, the second dichroic mirror（8）To the second pumping source（7）The laser that sends is high thoroughly, to the
Binary signal laser is high anti-, the 4th dichroic mirror（15）What the 3rd laser pumping source (12) and the 4th laser pumping source (13) were sent swashs
Light is high thoroughly, high to the 3rd 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
State the first dichroic mirror（2）Completely reflecting mirror is connected in the light path for coupling output（19）, the second dichroic mirror（8）Connect on coupling output light path
Connect the 5th dichroic mirror（20）, the 4th dichroic mirror（15）Couple and the 6th dichroic mirror is connected on output light path（21）, completely reflecting mirror（19）、
5th dichroic mirror（20）With the 6th dichroic mirror（21）It is sequentially connected；Completely reflecting mirror（19）For reflecting the first rare earth ion doped light
It is fine（4）The first signal laser produced, the 5th dichroic mirror（20）For to the first rare earth ion doped optical fiber（4）First is produced to believe
Number laser is high thoroughly, to the second rare earth ion doped optical fiber（10）The secondary signal laser of generation is high anti-（10）, the 6th dichroic mirror
（21）For to the first rare earth ion doped optical fiber（4）With the second rare earth ion doped optical fiber（10）Produce the first signal laser and
Secondary signal laser is high thoroughly, to the 3rd rare earth ion doped optical fiber（17）Produce the 3rd signal laser high anti-.
9. the method for ultra wide band continuously adjustable laser, its feature are obtained using laser described in claim 1 to 8 any one
It is：It is by adjusting the plane diffraction grating placed with littrow types structure when at least one laser pumping source is unlocked
（6）Angle realize the wavelength tuning of output optical fibre laser, wherein the laser pumping source is：First laser pumping source（1）,
Dual-laser pumping source（7）, the 3rd laser pumping source（12）With the 4th laser pumping source（13）.
10. a kind of method for obtaining ultra wide band continuously adjustable laser according to claim 9, it is characterised in that：User
Tuning band according to actual needs, increases or decreases the resonator number included in laser system.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165529A (en) * | 2019-06-05 | 2019-08-23 | 四川大学 | Three wave bands of one kind are the same as repetition tunable wave length mid-infrared fiber laser |
| US10608399B1 (en) | 2018-12-13 | 2020-03-31 | South China University Of Technology | Manufacturing technique of ultra-wideband high gain optical fibers and devices |
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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2017
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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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10608399B1 (en) | 2018-12-13 | 2020-03-31 | South China University Of Technology | Manufacturing technique of ultra-wideband high gain optical fibers and devices |
| CN110165529A (en) * | 2019-06-05 | 2019-08-23 | 四川大学 | Three wave bands of one kind are the same as repetition tunable wave length mid-infrared fiber laser |
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