CN110165529A - Three wave bands of one kind are the same as repetition tunable wave length mid-infrared fiber laser - Google Patents
Three wave bands of one kind are the same as repetition tunable wave length mid-infrared fiber laser Download PDFInfo
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- CN110165529A CN110165529A CN201910487091.9A CN201910487091A CN110165529A CN 110165529 A CN110165529 A CN 110165529A CN 201910487091 A CN201910487091 A CN 201910487091A CN 110165529 A CN110165529 A CN 110165529A
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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
- H01S3/09—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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- 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
- H01S3/094049—Guiding of the pump light
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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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1605—Solid materials characterised by an active (lasing) ion rare earth terbium
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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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1613—Solid materials characterised by an active (lasing) ion rare earth praseodymium
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Abstract
The invention discloses a kind of three wave bands with repetition tunable wave length mid-infrared fiber laser, comprising: laser pumping source generates the laser of first wave length and the laser of second wave length；First via laser inputs the laser of the first wave length and exports the laser of modulated first band and the laser of second band；No. second laser inputs the laser of the second wave length and generates the laser of modulated third wave band and the laser of the 4th wave band, and wherein third wave band is identical as second band；The laser of the first band and the laser of second band are inputted again, and the laser of third wave band further makes the Laser Modulation of the 4th wave band by the Laser Modulation of second band；The finally same recurrent frequency pulse laser of three band wavelengths of the output including first band, second band and the 4th wave band.The present invention solves the problems, such as that the development of the middle infrared pulse optical fiber laser of the prior art is concentrated mainly on single band or two waveband output.
Description
Technical field
The present invention relates to optical fiber laser field, more particularly to a kind of three wave bands are fine with repetition tunable wave length mid-infrared light
Laser.
Background technique
Currently, since optical fiber laser is using optical fiber as gain media, structure at low cost compared to other laser fabrications
Flexibly, stability is good, high conversion efficiency, therefore has become the technological approaches of maximally efficient and practical output mid-infrared laser.
The working method of pulse operating can not only keep good beam quality, but also can realize under output energy on an equal basis and be higher by several quantity
The power output of grade.Pulse laser implementation method mainly has gain modulation, adjusts Q and three kinds of mode locking.In recent years, researchers
It is dedicated to rare earth ion (Er3+、Ho3+、Dy3+) in doped fluoride the long wave direction of infrared pulse optical fiber laser wavelength expand,
The research that output waveband increases, wavelength tuning range is broadening etc..However in the prior art, middle infrared pulse optical-fiber laser
The development of device is concentrated mainly on single band or two waveband output, and wavelength tuning range is limited.
In addition, in the prior art, more optical fiber laser output laser being carried out the simple beam that closes and handle to realize certain
One certain section of wavelength covering and wavelength tuning it is usually necessary to use more laser pumping sources, considerably increase system complexity and
Cost.
Meanwhile in 3~8 μm infrared band because it is located at atmosphere " transparent window " and covers the absorption of vibrations of different kinds of molecules
Peak thus spectroscopy, atmospheric communication, laser surgey, long-range remote sensing and in terms of have important application.However mesh
Before, the output wavelength of middle infrared pulse optical fiber laser is also difficult to more than 3.5 μm, in 3~8 μm of middle infrared wavelength regions, at present
Also lack a kind of defeated by the pulse laser of infrared long wave multiband covering and tunable wave length in an optical fiber laser realization
Out.
Therefore it provides a kind of three wave bands are that this field is urgently to be resolved with repetition tunable wave length mid-infrared fiber laser
Problem.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of three wave bands with red in repetition tunable wave length
Infrared optical fiber laser.
The purpose of the present invention is achieved through the following technical solutions:
The first aspect of the present invention provides three wave bands of one kind with repetition tunable wave length mid-infrared fiber laser, comprising:
Laser pumping source generates the laser of first wave length and the laser of second wave length；
First via laser inputs the laser of the first wave length and exports the laser and second of modulated first band
The laser of wave band；
No. second laser inputs the laser of the second wave length and generates the laser and the 4th of modulated third wave band
The laser of wave band, wherein third wave band is identical as second band；The laser of the first band and swashing for second band are inputted again
Light, the laser of third wave band further make the Laser Modulation of the 4th wave band by the Laser Modulation of second band；Finally output packet
Include the same recurrent frequency pulse laser of three band wavelengths including first band, second band and the 4th wave band.
Further, the laser pumping source is one, while generating the laser of first wave length and the laser of second wave length.
Further, the mid-infrared fiber laser further include:
First dichroic mirror, it is high to the laser of first wave length saturating positioned at the output end of laser pumping source, second wave length is swashed
The laser of light, the laser of first band and second band is high anti-, for dividing the laser of the laser of first wave length and second wave length
From to first via laser and No. second laser, and the laser and second band of the first band that first via laser is exported
Laser export to No. second laser.
Further, the laser pumping source is that Er is mixed in cascade3+Fluoride fiber laser.
Further, it is additionally provided with the first convex lens between first dichroic mirror and laser pumping source, to first wave length
Laser and the laser of second wave length high thoroughly and collimated.
Further, the first via laser includes sequentially connected: the second convex lens, first rare earth ion doped
Optical fiber, tapered fiber, third convex lens and plane balzed grating,；Wherein the second convex lens receives the laser input of first wave length,
And export the laser of first band and the laser of second band.
Further, first rare earth ion doped optical fiber is to mix Pr3+Chalcogenide fiber.
Further, No. second laser includes sequentially connected: optoisolator, the 4th convex lens, second dilute
Native ion-doped optical fiber, the 5th convex lens and the second dichroic mirror；Second dichroic mirror is high to the laser of second wave length anti-, to the
The laser of the laser of one wave band, the laser of second band and the 4th wave band is high thoroughly；The second dichroic mirror input second band
Laser, and export the same recurrent frequency pulse laser of three band wavelengths including first band, second band and the 4th wave band；
The optoisolator prevents laser reverse transfer, and optoisolator inputs the laser of first band and the laser of second band.
Further, No. second laser further includes the total reflection mirror positioned at optoisolator front end, for guiding the
The laser of one wave band and the laser of second band.
Further, second rare earth ion doped optical fiber is to mix Tb3+Chalcogenide fiber.
The beneficial effects of the present invention are:
(1) development that the present invention solves the middle infrared pulse optical fiber laser of the prior art is concentrated mainly on single band or double
Wave band output proposes a kind of same repetition wavelength mid-infrared fiber laser of exportable three wave band, more waves proposed by the present invention
Pulsed infrared laser, which generates scheme, in section wideband adjustable has good portability, can be changed according to actual wavelength demands
Become rare earth ion doped type and concentration.
(2) in one example embodiment of the present invention, Er is mixed using cascade3+Fluoride fiber laser and dichroic mirror,
Solving the prior art needs more optical fiber laser output laser to carry out simple conjunction beam processing to realize a certain certain section of wavelength
Covering and wavelength tuning are it is often necessary to the problem of using more laser pumping sources.
(3) it in one example embodiment of the present invention, is realized using a plane balzed grating, to three band pulses
The wavelength tuning of laser.
(4) in one example embodiment of the present invention, Pr will be mixed3+The true saturable absorption tune Q/ mode locking of chalcogenide fiber
With mix Tb3+Chalcogenide fiber cascaded gain impulse modulation combines, and realizes three wave bands and exports with recurrent frequency pulse laser.
(5) in one example embodiment of the present invention, using mixing Pr3+Chalcogenide fiber and mix Tb3+Chalcogenide fiber is made
For gain media, plane balzed grating, is drawn at cone coating two-dimensional material as wavelength tuning and output coupling device in conjunction with optical fiber
Reason realizes impulse modulation, can realize 3~8 μm of three wave band with the pulsed light of repetition tunable wave length in an optical fiber laser
Fine laser output
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is to mix Pr3+Chalcogenide fiber simplifies energy diagram；
Fig. 3 is to mix Tb3+Chalcogenide fiber simplifies energy diagram.
Specific embodiment
Technical solution of the present invention is clearly and completely described with reference to the accompanying drawing, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application.
It is also intended in the application and the "an" of singular used in the attached claims, " described " and "the" including majority
Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps
It may be combined containing one or more associated any or all of project listed.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the application
A little information should not necessarily be limited by these terms.These terms are only used to for same type of information being distinguished from each other out.For example, not departing from
In the case where the application range, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination ".
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
An exemplary embodiment is shown referring to Fig. 1, Fig. 1, a kind of three wave bands are fine with repetition tunable wave length mid-infrared light
Laser, comprising:
Laser pumping source 1 generates the laser of first wave length and the laser of second wave length；
First via laser inputs the laser of the first wave length and exports the laser and second of modulated first band
The laser of wave band；
No. second laser inputs the laser of the second wave length and generates the laser and the 4th of modulated third wave band
The laser of wave band, wherein third wave band is identical as second band；The laser of the first band and swashing for second band are inputted again
Light, the laser of third wave band further make the Laser Modulation of the 4th wave band by the Laser Modulation of second band；Finally output packet
Include the same recurrent frequency pulse laser of three band wavelengths including first band, second band and the 4th wave band.
Wherein, in first via laser, the laser of first band and the laser of second band during energy level transition,
With shared energy level, therefore the laser of first band and the laser of second band can phase inter-modulations.Similarly, in the second road laser
In device, the laser of the laser of third wave band and the 4th wave band can also phase inter-modulation.
And for the laser of third wave band by the Laser Modulation of second band, it is the laser and the second wave due to third wave band
The laser of section is that (identical with wave band of laser, that is, frequency v, photon energy hv is identical, therefore the laser of second band with wave band of laser
Photon energy also meets the energy level difference energy (E for generating the laser of third wave band2-E1=hv), E2For high level energy, E1It is low
Energy levels, h are planck constant, and v is photon frequency).After the laser of second band is inputted into No. second laser, it is in
Stimulated radiation occurs under the action of the laser of second band for the particle of upper energy level (i.e. energy level in the correspondence of the 4th wave band), and right
The laser of second band carries out light amplification, makes the laser of second band in the process with other wavelength lasers contention high level particle
Middle dominance, and inhibit the generation of other wavelength lasers, the laser of final second band becomes optical fiber after intracavitary continuous circulation
The central wavelength for exporting laser, so that the laser of third wave band is by the Laser Modulation of second band.And in third wave band
Laser modulated after, the laser of third wave band is also modulated according to laser of the aforementioned principles to the 4th wave band.
For above-mentioned multiple phase inter-modulation, its object is to: (1) synperiodic arteries and veins is realized by the method for gain modulation
Impulse light；(2) tuning operation optical maser wavelength.
It should be noted that the first wave length is 1.5 μm, second wave length 3 in following preferred illustrative embodiments
μm, first band is 3.5~4 μm, and second band and third wave band are 4.3~4.8 μm, and the 4th wave band is 7.3~7.8 μm.
But do not indicate that the application is suitable only for the wavelength and wave band, any wavelength for being able to achieve the application function and wave band are in this Shen
In protection scope please.
Preferably, in one exemplary embodiment, the laser pumping source 1 is one, while generating swashing for first wave length
The laser of light and second wave length.And the laser pumping source 1 is that Er is mixed in cascade3+Fluoride fiber laser can generate simultaneously
The laser of 1.5 mum wavelengths (i.e. first wave length) and the laser of 3 mum wavelengths (i.e. second wave length).
Preferably, as shown in Figure 1, in one exemplary embodiment, the mid-infrared fiber laser further include:
First dichroic mirror 3 is high to the laser of 1.5 mum wavelengths (i.e. first wave length) positioned at the output end of laser pumping source 1
Thoroughly, to the laser and 4.3~4.8 mum wavelengths of the laser of 3 mum wavelengths (i.e. second wave length), 3.5~4 mum wavelengths (i.e. first band)
The laser of (i.e. second band) is high anti-, is used for the laser of 1.5 mum wavelengths (i.e. first wave length) and 3 mum wavelengths (i.e. second wave length)
Separation by laser to first via laser and No. second laser, and 3.5~4 mum wavelengths that first via laser is exported are (i.e.
First band) laser and the laser of 4.3~4.8 mum wavelengths (i.e. second band) export to No. second laser.
Preferably, as shown in Figure 1, in one exemplary embodiment, between first dichroic mirror 3 and laser pumping source 1
It is additionally provided with the first convex lens 2, it is saturating simultaneously to the laser height of 1.5 mum wavelengths (i.e. first wave length) and 3 mum wavelengths (i.e. second wave length)
It is collimated.
And as shown, the first dichroic mirror 3 and 2 shoot laser of the first convex lens are axially in that 45 degree of angles are placed.
Preferably, as shown in Figure 1, in one exemplary embodiment, the first via laser includes sequentially connected:
Second convex lens 4, the first rare earth ion doped optical fiber 5, tapered fiber 6, third convex lens 7 and plane balzed grating, 8；Wherein
Two convex lenses 4 receive the laser input of 1.5 mum wavelengths (i.e. first wave length), and export 3.5~4 mum wavelengths (i.e. first band)
The laser of laser and 4.3~4.8 mum wavelengths (i.e. second band).Specifically:
Second convex lens 4, laser, 3.5~4.8 mum wavelengths to 1.5 mum wavelengths (i.e. first wave length) (include first wave
Section and second band) laser is high thoroughly, for the laser coupled of 1.5 mum wavelengths (i.e. first wave length) is rare earth ion doped into first
In optical fiber 5, at the same collimate the first rare earth ion doped optical fiber 5 output 3.5~4 mum wavelengths (i.e. first band) laser and
The laser of 4.3~4.8 mum wavelengths (i.e. second band).
First rare earth ion doped optical fiber 5 is to mix Pr3+Chalcogenide fiber, for generating 3.5~4 mum wavelength (i.e. first waves
Section) laser and 4.3~4.8 mum wavelengths (i.e. second band) laser, the optical fiber close to the second convex lens 4 one end carry out 0 °
Angle vertical cut is used to provide 5% reflection, and the other end carries out 8 ° of angles and chamfers the Fresnel reflection for eliminating end face.
It carries out drawing cone processing on the first rare earth ion doped optical fiber 5, be formed tapered fiber 6 (drawing cone micro-nano fiber), and
Two-dimensional material (graphene, carbon nanotube etc.) is applied on optical fiber, two-dimensional material realizes 4.3 as saturable absorber~
The pulse laser (adjusting Q or mode locking) of 4.8 mum wavelengths (i.e. second band).
Third convex lens 7, it is high to the laser of 4.3~4.8 mum wavelengths (i.e. second band) saturating, for the first rare earth ion
The laser alignment that doped fiber 5 exports.
Plane balzed grating, 8, with the placement of Littrow structure, for as 4.3~4.8 mum wavelength laser resonant cavities
Other end feedback, while realizing the tuning of the laser of 4.3~4.8 mum wavelengths (i.e. second band).
Specific step is as follows for laser in first via laser:
First turn on laser and 3 mum wavelengths (i.e. the second wave that laser pumping source 1 generates 1.5 mum wavelengths (i.e. first wave length)
It is long) laser, wherein the laser of 1.5 mum wavelengths (i.e. first wave length) is through the first convex lens 2, the first dichroic mirror 3 and the second convex lens
Mirror 4 is coupled into the first rare earth ion doped optical fiber 5 and mixes Pr3+It is dilute first under two-dimensional material effect in chalcogenide fiber
Constantly circulation is realized in the laser that native ion-doped optical fiber 5, tapered fiber 6, third convex lens 7, plane balzed grating, 8 form
Pulse laser (adjust Q or mode locking) and by the pulse laser of the second convex lens 4 output 3.5~4.0 mum wavelengths (i.e. first band) and
The pulse laser of 4.3~4.8 mum wavelengths (i.e. second band), wherein resonant cavity feedback is by 5 He of the first rare earth ion doped optical fiber
Plane balzed grating, 8 forms, and the laser of 4.3~4.8 mum wavelengths (i.e. second band) can be realized by Plane of rotation balzed grating, 8
Tune and realize under cascade energy level gain modulation effect the laser tuning of 3.5~4 mum wavelengths (i.e. first band).
Referring to fig. 2, it is as follows to generate corresponding energy level process for above-mentioned laser:
3H4Energy level 15 is to mix Pr3+The ground state level of chalcogenide fiber is3H4→3F4,3F3The starting of 19 transition process of energy level
Energy level and3H5→3H4The termination energy level of 21 transition process of energy level has a large amount of particles on the energy level；3H5Energy level 16 is to mix Pr3+Vulcanization
The first excited state energy level of object light fibre is3F2,3H6→3H5The termination energy level of 20 transition process of energy level and3H5→3H4Energy level 21 jumps
Move the starting energy level of process；3F2,3H6Energy level 17 is to mix Pr3+The Second Excited State energy level of chalcogenide fiber is3F2,3H6→3H5Energy
The starting energy level of 20 transition process of grade；3F4,3F3Energy level 18 is to mix Pr3+The third excited level of chalcogenide fiber is3H4→3F4,3F3The termination energy level of 19 transition process of energy level；3H4→3F4,3F319 transition process of energy level, the process absorb 1.5 mum wavelengths
(i.e. first wave length) laser, will3H4Particle on energy level 15 is pumped into3F4,3F3On energy level 18；3F2,3H6→3H520 transition of energy level
Process, the process will by way of stimulated radiation3F2,3H6Particle on energy level 17 is discharged into3H5On energy level 16, generate simultaneously
3.5~4 mum wavelengths (i.e. first band) laser；3H5→3H421 transition process of energy level, the process will by way of stimulated radiation3H5Particle on energy level 16 is discharged into3H4On energy level 15, while generating 4.3~4.8 mum wavelengths (i.e. second band) laser.More
It is specific:
The laser of 1.5 mum wavelengths (i.e. first wave length) passes through3H4→3F419,3F3Energy level transition process will3H4On energy level 19
Particle is pumped into3F4,3F3On energy level 18, due to multi-phonon relaxation phenomena,3F4,3F3Particle constantly exists on energy level 183F2,3H6Energy level
It is accumulated on 17, when3F2,3H617 He of energy level3H5When energy level 16 meets condition of population inversion,3F2,3H6→3H520 transition of energy level
Cheng Fasheng generates 3.5~4 mum wavelength laser and makes3H5Population increases on energy level 16, when3H516 He of energy level3H4Energy level 15 meets
When condition of population inversion,3H5→3H421 transition process of energy level occurs, and generates swashing for 4.3~4.8 mum wavelengths (i.e. second band)
Light simultaneously causes3H516 particle density of energy level decline, to promote3F2,3H617 particle of energy level transits to3H5Energy level 16, so 3.5~
The generation of the laser of the laser and 4.3~4.8 mum wavelengths (i.e. second band) of 4 mum wavelengths (i.e. first band) can phase intermodulation
System, when the laser of 4.3~4.8 mum wavelengths (i.e. second band) realizes pulse laser under two-dimensional material effect,3H5Energy level 16
The variation in same period occurs for population density, so that the laser of 3.5~4 mum wavelengths (i.e. first band) is similarly to weigh
Complex frequency output finally exports 3.5~4 mum wavelengths (i.e. first band) after collimating and 4.3~4.8 μm in the second convex lens 4
The pulse laser for same repetition that wavelength (i.e. second band) is tunable.
Preferably, as shown in Figure 1, in one exemplary embodiment, No. second laser includes sequentially connected:
Optoisolator 10, the 4th convex lens 11, the second rare earth ion doped optical fiber 12, the 5th convex lens 13 and the second dichroic mirror 14；Institute
It is high to the laser of second wave length anti-to state the second dichroic mirror 14, laser, 4.3~4.8 μ to 3.5~4 mum wavelengths (i.e. first band)
The laser of the laser of m wavelength (i.e. second band) and 7.3~7.8 mum wavelengths (i.e. the 4th wave band) is high thoroughly；Second dichroic mirror
The laser of 14 input second band, and exporting includes 3.5~4 mum wavelengths (i.e. first band), 4.3~4.8 mum wavelengths (i.e. second
Wave band) and 7.3~7.8 mum wavelengths (i.e. the 4th wave band) including three band wavelengths same recurrent frequency pulse laser；The light every
Laser reverse transfer is prevented from device 10, optoisolator 10 inputs the laser of first band and the laser of second band.Specifically:
Optoisolator 10, for preventing laser reverse transfer.
4th convex lens 11, it is high thoroughly to the laser of 3.5~4.8 mum wavelengths (including first band and second band), it uses
The laser and 4.3~4.8 mum wavelengths (i.e. the second wave for 3.5~4 mum wavelengths (i.e. first band) that optoisolator 10 is exported
Section) laser coupled into the second rare earth ion doped optical fiber 12.
Second rare earth ion doped optical fiber 12 is to mix Tb3+Chalcogenide fiber, for generating 4.3~4.8 mum wavelength (i.e. thirds
Wave band) laser and 7.3~7.8 mum wavelengths (i.e. the 4th wave band) laser, which carries out 0 ° of angle vertical cut for providing
5% reflection.
5th convex lens 13 (includes first band, second band, third wave band and the 4th wave to 3~7.8 mum wavelengths
Section) laser is high thoroughly, for 3 mum wavelengths (i.e. second wave length) for carrying out the guiding of the second dichroic mirror 14 laser coupled into the second rare earth
In ion-doped optical fiber 12, while collimating 3.5~4 mum wavelength (i.e. first waves of the second rare earth ion doped optical fiber 12 output
Section), 4.3~4.8 mum wavelengths (i.e. second band) and 7.3~7.8 mum wavelengths (i.e. third wave band) wavelength laser.
Second dichroic mirror 14, it is high to the laser of 3 mum wavelengths (i.e. second wave length) anti-, (include to 3.5~7.8 mum wavelengths
First band, second band, third wave band and the 4th wave band) laser is high thoroughly, with 3 mum wavelengths of the first dichroic mirror 3 guiding (i.e. the
Two wavelength) laser is axially in that 45 degree of angles are placed, for by 3 mum wavelengths (i.e. second wave length) las er-guidance to 13 the 5th convex lenses simultaneously
Realize 3.5~4 mum wavelengths (i.e. first band), 4.3~4.8 mum wavelengths (i.e. second band) and 7.3~7.8 mum wavelengths (i.e. the
Four wave bands) laser output.
In addition, in one exemplary embodiment, No. second laser further includes positioned at the complete of 10 front end of optoisolator
Reflecting mirror 9 (gold-plated reflecting mirror) is axially in that 45 degree of angles are placed with 3 reflection laser of the first dichroic mirror, for guiding 3.5~4 μm of waves
The laser of long (i.e. first band) and the laser of 4.3~4.8 mum wavelengths (i.e. second band).
Specific step is as follows for laser in first via laser:
Laser pumping source 1 generate 3 mum wavelengths (i.e. second wave length) laser by the first dichroic mirror 3, the second dichroic mirror 14,
5th convex lens 13 is equally coupled into the second rare earth ion doped optical fiber 12, subsequent 3 mum wavelength (i.e. second wave length) laser
Absorbed by the second rare earth ion doped optical fiber 12, the second rare earth ion doped optical fiber 12 composition laser in generate 4.3~
4.8 mum wavelengths (i.e. third wave band) and 7.3~7.8 mum wavelengths (the 4th wave band) laser, and the 3.5~4 of the second convex lens 4 output
Mum wavelength (i.e. first band) and 4.3~4.8 mum wavelengths (i.e. second band) laser by the first dichroic mirror 3, total reflection mirror 9,
Optoisolator 10, the 4th convex lens 11 are coupled into the second rare earth ion doped optical fiber 12 and to modulate second rare earth ion doped
4.3~4.8 mum wavelengths (i.e. third wave band) and 7.3~7.8 mum wavelengths (i.e. the 4th wave band) laser in optical fiber 12, finally from
Two dichroic mirrors 14 export 3.5~4.0 mum wavelengths (i.e. first band), 4.3~4.8 mum wavelengths (i.e. second band) and 7.3~7.8
The pulse laser of mum wavelength (i.e. the 4th wave band), wherein resonant cavity feeds back the both ends vertical cut by the second rare earth ion doped optical fiber 12
End face composition.
Referring to Fig. 3, it is as follows that above-mentioned laser generates corresponding energy level process:
7F6Energy level 22 is to mix Tb3+The ground state level of chalcogenide fiber is7F6→7F4The starting energy level of 25 transition process of energy level
With7F5→7F6The termination energy level of 27 transition process of energy level has a large amount of particles on the energy level；7F5Energy level 23 is to mix Tb3+Vulcanize object light
Fine first excited state energy level is7F4→7F5The termination energy level of 26 transition process of energy level and7F5→7F627 transition process of energy level
Originate energy level；7F4Energy level 24 is to mix Tb3+The Second Excited State energy level of chalcogenide fiber is7F6→7F425 transition process of energy level
Terminate energy level and7F4→7F5The starting energy level of 26 transition process of energy level；7F6→7F425 transition process of energy level, the process absorb 3 μm
Wavelength (i.e. second wave length) laser, will7F6Particle on energy level 22 is pumped into7F4On energy level 24；7F4→7F526 transition of energy level
Journey, the process will by way of stimulated radiation7F4Particle on energy level 24 is discharged into7F5On energy level 23, while generation 7.3~
7.8 mum wavelengths (i.e. the 4th wave band) laser；7F5→7F627 transition process of energy level, the process will by way of stimulated radiation7F5
Particle on energy level 23 is discharged into7F6On energy level 22, while generating 4.3~4.8 mum wavelengths (i.e. third wave band) laser.More have
Body:
3 mum wavelengths (i.e. first wave length) laser passes through7F6→7F425 transition process of energy level will7F6Particle on energy level 22 is taken out
It transports to7F4On energy level 24, when7F424 He of energy level7F5When energy level 23 meets condition of population inversion,7F4→7F526 transition of energy level
Cheng Fasheng generates 7.3~7.8 mum wavelengths (i.e. the 4th wave band) laser and makes7F5Population increases on energy level 23, when7F5Energy level 23
With7F6When energy level 22 meets condition of population inversion,7F5→7F627 transition process of energy level occurs, and generates 4.3~4.8 mum wavelengths
(i.e. third wave band) laser simultaneously causes7F523 particle density of energy level decline, to promote7F4Energy level 24 transits to7F5Energy level 23, institute
With in the second rare earth ion doped optical fiber 12 4.3~4.8 mum wavelengths (i.e. third wave band) laser and 7.3~7.8 mum wavelengths (i.e.
4th wave band) laser generation can phase inter-modulation, when the second rare earth ion doped optical fiber 12 generate 4.3~4.8 mum wavelengths
4.3~4.8 mum wavelengths (i.e. second band) laser tune that (i.e. third wave band) laser is generated by the first rare earth ion doped optical fiber 5
System to realize the tuning of wavelength and when with recurrent frequency pulse laser,7F5The variation in same period occurs for 23 population density of energy level,
So that 7.3~7.8 mum wavelengths (i.e. the 4th wave band) laser is realized the tuning of wavelength and is exported with same recurrent frequency pulse laser, most
Afterwards from the second dichroic mirror 14 output 3.5~4.0 mum wavelengths (i.e. first band), 4.3~4.8 mum wavelengths (i.e. second band) and
The pulse laser of the tunable same repetition of three band wavelengths of 7.3~7.8 mum wavelengths (i.e. the 4th wave band).
Wherein, additional description is needed, the wavelength that laser actually exports laser is all a range, and non-individual
One wavelength, this is because energy level is actually an energy band, so the energy difference (E between upper and lower two energy level2-E1) it is a model
Enclose, therefore corresponding wavelength is also range, rather than some absolute value, the meeting of final laser output be which specific wavelength then by
Depending on concrete condition.
Tb is mixed in 3 μm of routes (i.e. No. second laser) in this example embodiments3+Chalcogenide fiber swashs at 3 μm
The optical maser wavelength generated under the pumping of light is also that a wider range (is in one exemplary embodiment 4.8 μ for center wavelength
M), the laser for but since 1.5 μm of routes (i.e. first via laser) are inner producing 4.3~4.8 μm in device plane (assuming that glitter
The reality output laser of 4.5 mum wavelengths under the adjusting of grating 8), 4.5 μm of laser input as signal light into 3 μm of routes (i.e.
No. two lasers) after to mixing Tb3+Chalcogenide fiber is modulated, and exports the laser of co-wavelength (i.e. 4.5 μm), specific modulated process
It is as follows:
3 mum wavelengths (i.e. second wave length) laser by particle by7F6Energy level is pumped into7F4Energy level is simultaneously constantly accumulated in the energy level,
The generation when meeting condition of population inversion7F4→7F5Energy level transition generates the laser that central wavelength is 4.8 μm；But when 4.5 μm
Laser is inputted into after 3 μm of routes (i.e. No. second laser), in upper energy level (7F4Energy level) particle 4.5 μm of laser effect
Lower generation stimulated radiation, and light amplification is carried out to 4.5 μm of laser, so that 4.5 μm of laser is being fought for high level with other wavelength lasers
It is dominant during particle, and inhibit the generation of other wavelength lasers, final 4.5 μm of laser becomes after intracavitary continuous circulation
The central wavelength of optical fiber output laser.
So the optical maser wavelength of 3 μm of routes (i.e. No. second laser) output is by 1.5 μm of route (i.e. first via laser
Device) output optical maser wavelength determine, when 1.5 μm of routes (i.e. first via laser) export 4.3~4.8 μm of laser when, 3 μm of lines
Road (i.e. No. second laser) also exports the laser of same wavelength.
Moreover, it is achieved that there are three types of the mode of optical fiber laser pulse output is general: mode locking adjusts Q, gain modulation, above-mentioned to show
The method that 3um route (i.e. No. second laser) realizes pulse output in example property embodiment is exactly gain modulation, due to7F5Energy level
23 are7F4→7F526 transition process of energy level and7F5→7F6The shared energy level of 27 transition process of energy level, so working as7F5On energy level 23
When population generating period changes,7F4→7F526 transition process of energy level and7F5→7F627 transition process of energy level also can be with same
Period be changed, thus make generate 4.3~4.8um wavelength (i.e. third wave band) laser and 7.3~7.8um wavelength (i.e.
4th wave band) laser progress cyclically-varying, finally export pulse laser.(launches laser and need two energy level populations up and down
It inverts, i.e., there are many upper energy level population, and lower energy level is seldom, and then particle forms laser from upper energy level transition to lower energy level.
The mechanical periodicity of intermediate level population necessarily leads to both synperiodic variations of transition process population inversion situation, so
Two kinds of transition process be it is interrelated, can phase inter-modulation, then corresponding to two kinds of energy level transitions two output laser then
It can be the pulse with same repetition rate.)
And make7F5The method of population generating period variation on energy level 23 is exactly to input 4.3~4.8um wave to optical fiber
Long (third wave band) or 7.3~7.8um wavelength (the 4th wave band) pulse laser carrys out the output of modulation optical fiber laser, specific to modulate
Principle: after 4.5um pulse laser is inputted as signal light into 3um route (i.e. No. second laser), in upper energy level (7F4Energy
The stimulated radiation of particle generating period under the action of 4.5um pulse laser (signal light) of grade 24), and to 4.5um laser
Periodical light amplification is carried out, it is dominant during fighting for high level particle with other wavelength lasers to make 4.5um laser, and press down
The generation of other wavelength lasers is made, final 4.5um laser becomes the central wavelength of optical fiber output laser after intracavitary continuous circulation
And export and signal light with repetition pulse laser.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments, right
For those of ordinary skill in the art, can also make on the basis of the above description other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of three wave bands are the same as repetition tunable wave length mid-infrared fiber laser, it is characterised in that: include:
Laser pumping source generates the laser of first wave length and the laser of second wave length；
First via laser inputs the laser of the first wave length and exports the laser and second band of modulated first band
Laser；
No. second laser inputs the laser of the second wave length and generates the laser and the 4th wave band of modulated third wave band
Laser, wherein third wave band is identical as second band；The laser of the first band and the laser of second band are inputted again, the
The laser of three wave bands further makes the Laser Modulation of the 4th wave band by the Laser Modulation of second band；Finally output includes the
The same recurrent frequency pulse laser of three band wavelengths including one wave band, second band and the 4th wave band.
2. a kind of three wave band according to claim 1 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: the laser pumping source is one, while generating the laser of first wave length and the laser of second wave length.
3. a kind of three wave band according to claim 2 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: the mid-infrared fiber laser further include:
First dichroic mirror, positioned at the output end of laser pumping source, it is high to the laser of first wave length thoroughly, to the laser of second wave length,
The laser of first band and the laser of second band are high anti-, for by the separation by laser of the laser of first wave length and second wave length extremely
First via laser and No. second laser, and the laser for the first band that first via laser is exported and second band swash
Light output is to No. second laser.
4. a kind of three wave band according to claim 2 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: the laser pumping source is that Er is mixed in cascade3+Fluoride fiber laser.
5. a kind of three wave band according to claim 2 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: it is additionally provided with the first convex lens between first dichroic mirror and laser pumping source, the laser and the second wave to first wave length
Long laser is high saturating and is collimated.
6. a kind of three wave band according to claim 1 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: the first via laser includes sequentially connected: the second convex lens, the first rare earth ion doped optical fiber, tapered fiber,
Third convex lens and plane balzed grating,；Wherein the second convex lens receives the laser input of first wave length, and exports first band
Laser and second band laser.
7. a kind of three wave band according to claim 6 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: first rare earth ion doped optical fiber is to mix Pr3+Chalcogenide fiber.
8. a kind of three wave band according to claim 1 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: No. second laser includes sequentially connected: optoisolator, the 4th convex lens, the second rare earth ion doped optical fiber,
5th convex lens and the second dichroic mirror；Second dichroic mirror is high to the laser of second wave length anti-, to the laser of first band, the
The laser of the laser of two wave bands and the 4th wave band is high thoroughly；The laser of the second dichroic mirror input second band, and export and include
The same recurrent frequency pulse laser of three band wavelengths including first band, second band and the 4th wave band；The optoisolator is anti-
Only laser reverse transfer, optoisolator input the laser of first band and the laser of second band.
9. a kind of three wave band according to claim 8 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In the total reflection mirror that: No. second laser further includes positioned at optoisolator front end, for guide first band laser and
The laser of second band.
10. a kind of three wave band according to claim 8 is with repetition tunable wave length mid-infrared fiber laser, feature exists
In: second rare earth ion doped optical fiber is to mix Tb3+Chalcogenide fiber.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097846A (en) * | 2021-04-07 | 2021-07-09 | 电子科技大学 | Compact type mid-infrared band four-wavelength same repetition frequency all-fiber laser |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572379A (en) * | 2009-05-19 | 2009-11-04 | 北京国科世纪激光技术有限公司 | Three-band pulsing laser |
| CN102508215A (en) * | 2011-09-29 | 2012-06-20 | 北京振兴计量测试研究所 | Double-channel active and passive radar integrated simulator |
| US20130044770A1 (en) * | 2011-08-16 | 2013-02-21 | George Rakuljic | Frequency-chirped semiconductor diode laser phase-locked optical system |
| CN105896256A (en) * | 2016-06-29 | 2016-08-24 | 电子科技大学 | Dual-wavelength tunable intermediate infrared pulse fiber laser and method for obtaining 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 |
| CN106299986A (en) * | 2016-10-31 | 2017-01-04 | 电子科技大学 | A kind of all-fiber wavelength passive Q-adjusted mid-infrared fiber laser of optional dual wavelength |
| CN106374327A (en) * | 2016-08-25 | 2017-02-01 | 电子科技大学 | Intermediate infrared multi-band all-fiber soft glass laser and laser obtaining method |
| CN106571580A (en) * | 2016-10-19 | 2017-04-19 | 电子科技大学 | Mid-infrared fiber laser with tunable wavelength and broadband |
| CN107302174A (en) * | 2017-08-14 | 2017-10-27 | 四川大学 | The mid-infrared fiber laser and operating method of a kind of ultra wide band continuously adjustable |
| CN109672076A (en) * | 2019-01-22 | 2019-04-23 | 四川大学 | A kind of big model volume laser of multi-wavelength |
-
2019
- 2019-06-05 CN CN201910487091.9A patent/CN110165529B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572379A (en) * | 2009-05-19 | 2009-11-04 | 北京国科世纪激光技术有限公司 | Three-band pulsing laser |
| US20130044770A1 (en) * | 2011-08-16 | 2013-02-21 | George Rakuljic | Frequency-chirped semiconductor diode laser phase-locked optical system |
| CN102508215A (en) * | 2011-09-29 | 2012-06-20 | 北京振兴计量测试研究所 | Double-channel active and passive radar integrated simulator |
| CN105896256A (en) * | 2016-06-29 | 2016-08-24 | 电子科技大学 | Dual-wavelength tunable intermediate infrared pulse fiber laser and method for obtaining 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 |
| CN106374327A (en) * | 2016-08-25 | 2017-02-01 | 电子科技大学 | Intermediate infrared multi-band all-fiber soft glass laser and laser obtaining method |
| CN106571580A (en) * | 2016-10-19 | 2017-04-19 | 电子科技大学 | Mid-infrared fiber laser with tunable wavelength and broadband |
| CN106299986A (en) * | 2016-10-31 | 2017-01-04 | 电子科技大学 | A kind of all-fiber wavelength passive Q-adjusted mid-infrared fiber laser of optional dual wavelength |
| CN107302174A (en) * | 2017-08-14 | 2017-10-27 | 四川大学 | The mid-infrared fiber laser and operating method of a kind of ultra wide band continuously adjustable |
| CN109672076A (en) * | 2019-01-22 | 2019-04-23 | 四川大学 | A kind of big model volume laser of multi-wavelength |
Non-Patent Citations (1)
| Title |
|---|
| 罗鸿禹: "高功率2.97μm中红外被动调Q掺钬ZBLAN光纤激光器", 《中国激光》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113097846A (en) * | 2021-04-07 | 2021-07-09 | 电子科技大学 | Compact type mid-infrared band four-wavelength same repetition frequency all-fiber laser |
| CN113097846B (en) * | 2021-04-07 | 2022-07-29 | 电子科技大学 | Compact type mid-infrared band four-wavelength same repetition frequency all-fiber laser |
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