CN106785846A - A kind of changeable visible light fiber laser of wavelength - Google Patents
A kind of changeable visible light fiber laser of wavelength Download PDFInfo
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- CN106785846A CN106785846A CN201710209198.8A CN201710209198A CN106785846A CN 106785846 A CN106785846 A CN 106785846A CN 201710209198 A CN201710209198 A CN 201710209198A CN 106785846 A CN106785846 A CN 106785846A
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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
-
- 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
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06733—Fibre having more than one cladding
-
- 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
-
- 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
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The present invention discloses a kind of changeable visible light fiber laser of wavelength, is related to visible light fiber laser field in laser technology, including the laser pump source being sequentially connected, first dichroic mirror and the second dichroic mirror, coupled lens, the first fiber grating, second fiber grating, double clad mixes Er3+ZBLAN optical fiber and speculum.It uses 976nm and 1976nm dual wavelength cascaded pump er-doped fluoride optical-fiber lasers, only by controlling the switch of pumping source, just can realize that output optical fibre optical maser wavelength flexibly switches between red laser and green laser.The present invention solves the problems, such as that existing red laser and green laser cannot be sent from same laser in the way of single laser and cannot flexibly switch output.
Description
Technical field
The present invention relates to visible light fiber laser field in laser technology, more particularly to a kind of changeable visible of wavelength
Light optical fiber laser.
Background technology
Wavelength be located at visible ray (380nm-780nm) wave band laser laser display, biologic medical, industrial processes,
The fields such as astronomical research, specific communication have important application prospect, at present, realize that the method for visible light lasers output is mainly wrapped
Include using nonlinear effect realize frequency transformation produce visible ray and using upper conversion phenomena in the optical fiber of the rare ion of adulterating or
Produce visible ray on crystal, optical fiber laser as a kind of new laser, compared to conventional laser, with brightness is high, peak
Value power is high, tunable, laser threshold is low, output beam quality good, high conversion efficiency and height " surface area/volume " than, it is soft
Toughness and the remarkable advantage such as flexibility is good, be easily integrated., the Ti∶Sapphire laser pumping of 971nm of Uniphase companies of the U.S. in 1993
Mix Er3+Optical fiber laser realizes the output of green glow；2010, Northwest University Wang Cheng et al. was by mixing Nd3+、Ge3+Ion is co-doped with
Optical fiber and LBO frequency-doubling crystals obtained 544nm green glows output；2015, Yao Yunhua et al. used the pump of 800nm and 980nm
Pu source pumping Er3+/Yb3+Ion in co-doped fiber, enhances the upper transfer process of green laser, obtains very strong green glow and swashs
Light output.But most of report concentrates on single wavelength.
The titanium-doped sapphire laser pumping that nineteen ninety-five, Los Alamos National Laboratories Xie et al. pass through 860nm
Pr3+/Yb3+The method of the ZBLAN optical fiber being co-doped with takes the lead in realizing feux rouges, green glow, the output of the visible light wavelengths laser of blue light three；
2008, on the optical fiber that University Of Ningbo Dai Shixun et al. passes through the rare ion that adulterates conversion realize blue and green light dual wavelength can
See the output of ray laser；2011, Nakanishi et al. was optimized by the reflectivity to resonator mirror, with two 442nm
LD pumping sources to mixing Pr3+Optical fiber carry out pumping, obtained enhanced red laser and green laser output.Above-mentioned laser
Although device realizes can export several light on single laser, but this it is several just exported by forms of mixed light, i.e., without
Method realizes being realized on single laser the single output of several light, more cannot flexibly switch.
The content of the invention
It is an object of the invention to：Cannot be in the way of single laser from same to solve existing red laser and green laser
Sent in one laser and cannot flexibly switch the problem of output.And cannot flexibly switch the problem of output, the present invention is carried
For a kind of visible light fiber laser of the flexible switching of achievable green laser and red laser optical fiber, it using 976nm and
1976nm dual wavelength cascaded pump er-doped fluoride optical-fiber lasers, only by controlling the switch of pumping source, just can realize output light
Fine optical maser wavelength flexibly switches between red laser and green laser.
Technical scheme is as follows：
A kind of changeable visible light fiber laser of wavelength, including the laser pump source being sequentially connected, the one or two color
Mirror and the second dichroic mirror, coupled lens, the first fiber grating, the second fiber grating, double clad mix Er3+ZBLAN optical fiber and reflection
Mirror.
It is that laser pumping source includes respectively be connected with the first dichroic mirror and be mutually perpendicular to and different wave length for generation
976nm semiconductor laser pumpings source and 1976nm thulium-doped fiber laser pumping sources.
First dichroic mirror to wavelength for the laser of 976nm is high, to wavelength for the laser of 1976nm is high instead, for by two beams
The vertical pumping light compositing of 976nm and 1976nm is a branch of.
Second dichroic mirror is high to the laser that wavelength is 976nm, 1976nm and 3um, high to feux rouges and green glow anti-, for inciting somebody to action
The las er-guidance output of generation.
Coupled lens are used for the laser for producing 976nm pump lights or two pumping sources are produced through the first dichroic mirror and
Laser Focusing after the synthesis of second dichroic mirror mixes Er to the double clad3+In the inner cladding of ZBLAN optical fiber.
Speculum is high to green glow and feux rouges anti-, and the light to more than 2um is high.
Double clad mixes Er3+First fiber grating of ZBLAN optical fiber is constituted with speculum mixes Er3+ZBLAN optical fiber lasers are produced
The resonator of raw green laser；Double clad mixes Er3+Second fiber grating of ZBLAN optical fiber is constituted with speculum mixes Er3+ZBLAN
Optical fiber laser produces the resonator of red laser.
Preferably, the double clad mixes Er3+ZBLAN optical fiber is big core diameter doubly clad optical fiber, and the external diameter of surrounding layer is
300um, the external diameter of inner cladding is 260um, a diameter of 18um of fibre core.
Further, described double clad mixes Er3+The left side of ZBLAN optical fiber is 8 ° of angles, and right side is 0 ° of angle.
Operating process of the invention is：Er is mixed as visible laser3+The pumping source of ZBLAN optical fiber lasers, its
In pumping source be high-power 976nm semiconductor laser pumpings source 1, it is sharp that another pumping source is that 1976nm all -fibers mix thulium
Optical pumping source 2.976nm semiconductor laser pumpings source 1 is first opened, the pump light sent by 976nm semiconductor laser pumpings source 1 is passed through
Overcoupling lens 5 are coupled into double clad and mix Er3+In the inner cladding of ZBLAN (fluoride) optical fiber 8, double clad mixes Er3+ZBLAN
Wavelength is produced in the resonator that first fiber grating 6 and speculum 9 of optical fiber 8 are constituted in the green laser of 525nm；Open again
1976nm all -fibers mix Thulium lasers pumping source 2, and the pump light that two pumping sources send synthesizes a branch of parallel pump through the first dichroic mirror 3
Pu light, pump light is coupled into double clad and mixes Er by coupled lens 53+In the inner cladding of ZBLAN (fluoride) optical fiber 8, double-contracting
Layer mixes Er3+Generation wavelength 650nm's is red in the resonator that the fiber grating 7 and speculum 9 of ZBLAN (fluoride) optical fiber 8 are constituted
Ray laser.
After using such scheme, the beneficial effects of the present invention are：
(1) by using two kinds of laser pump (ing) doping with rare-earth ions optical fiber of different wave length, reach red laser, green glow and swash
The flexible changeable output of light, is conducive to expeditiously realizing that visible light lasers are exported.
(2) efficiently solving can only be by fundamental frequency light and its frequency multiplication in traditional visible optical fiber laser twin wavelength laser output
Problem is exported while light.
(3) device it is portable and can integrated level it is high, be conducive to practical application.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the changeable visible light fiber laser of wavelength.
Fig. 2 is that the present invention mixes Er3+Er in ZBLAN optical fiber3+Partial energy level diagram.
Fig. 3 is the structural representation of existing visible light fiber laser.
Marked in figure：1-976nm semiconductor laser pumpings source, 2-1976nm all -fibers mix Thulium lasers pumping source, 3- first
Dichroic mirror, the dichroic mirrors of 4- second, 5- coupled lens, the fiber gratings of 6- first, the fiber gratings of 7- second, 8- double clads mix Er3+
ZBLAN optical fiber, 9- speculums, 10- energy levels4I15/2, 11- energy levels4I13/2, 12- energy levels4I11/2, 13- energy levels4F9/2, 14- energy levels4S3/2, 15- energy levels2H11/2, 16- energy levels4F7/2, 17- ground state absorptions A, 18-976nm pumping optical pumping, 19-1976nm pump lights
Pumping, D, 25- are green for 20- spontaneous radiations A, 21- Excited-state Absorption A, 22- spontaneous radiation B, 23- spontaneous radiation C, 24- spontaneous radiation
Light radiation, 26- spontaneous radiations E, 27-- Excited-state Absorption B, 28- red light radiation.
Specific embodiment
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, can be with any
Mode is combined.
The present invention is elaborated below in conjunction with the accompanying drawings.
Embodiment 1
A kind of changeable visible light fiber laser of wavelength, including the laser pump source being sequentially connected, the one or two color
The dichroic mirror 4 of mirror 3 and second, coupled lens 5, the first fiber grating 6, the second fiber grating 7, double clad mixes Er3+ZBLAN optical fiber 8
With speculum 9.
It is that laser pumping source includes respectively be connected with the first dichroic mirror 3 and be mutually perpendicular to and different wave length for generation
976nm semiconductor laser pumpings source 1 and 1976nm thulium-doped fiber lasers pumping source 2.
First dichroic mirror 3 to wavelength for the laser of 976nm is high, to wavelength for the laser of 1976nm is high instead, for by two
The vertical pumping light compositing of beam 976nm and 1976nm is a branch of.
Second dichroic mirror 4 is high to the laser that wavelength is 976nm, 1976nm and 3um, high to feux rouges and green glow anti-, is used for
The las er-guidance output that will be produced.
Coupled lens 5 are used for the laser for producing 976nm pump lights or two pumping sources are produced through the first dichroic mirror 3
Laser Focusing after synthesizing with the second dichroic mirror 4 mixes Er to the double clad3+In the inner cladding of ZBLAN optical fiber 8.
Speculum 9 is high to green glow and feux rouges anti-, and the light to more than 2um is high.
Double clad mixes Er3+First fiber grating 6 of ZBLAN optical fiber 8 is constituted with speculum 9 mixes Er3+ZBLAN optical-fiber lasers
Device produces the resonator of green laser；Double clad mixes Er3+Second fiber grating 7 of ZBLAN optical fiber 8 is constituted with speculum 9 mixes Er3 +ZBLAN optical fiber lasers produce the resonator of red laser.
Double clad mixes Er3+ZBLAN optical fiber 8 is big core diameter doubly clad optical fiber, and the external diameter of surrounding layer is 300um, inner cladding
External diameter is 260um, a diameter of 18um of fibre core.
Double clad mixes Er3+The left side of ZBLAN optical fiber 8 is 8 ° of angles, and right side is 0 ° of angle.
Principle of the invention the following is：The wavelength that 976nm semiconductor laser pumpings source 1 is produced is the pump light of 976nm
Double clad is coupled into by coupled lens 5 mix Er3+In the inner cladding of ZBLAN (fluoride) optical fiber 8, when 976nm semiconductors swash
When the pumping of optical pumping source 1 starts, positioned at energy level4I15/2Particle on 10 is pumped into energy level by ground state absorption A174I11/2
On 12, positioned at I11/2Particle on 12 energy levels reaches energy level by 976nm pumpings optical pumping 18 again4S3/2On 14, it is located at4I11/2
Particle on 12 energy levels reaches energy level by Excited-state Absorption A21 again4F7/2On 16, while by spontaneous radiation A20, small part
Particle reaches energy level4I13/2On 11, positioned at energy level4F7/2Particle on 16 reaches energy level by spontaneous radiation B222H11/215th, again
Energy level is reached by spontaneous radiation C234S3/2On 14, population inversion is in energy level4S3/214 and energy level4I15/2Formed between 10
The green-light radiation 25 of 525nm, that is, produce green laser.By mixing Er3+The He of first fiber grating 6 of ZBLAN (fluoride) optical fiber 8
The resonator that speculum 9 is constituted produces the green laser of 525nm, and the final green laser for producing is by the anti-of the second dichroic mirror 4
Penetrate output.2. 1976nm thulium-doped fiber lasers pumping source 2 is now opened again, and 976nm semiconductor laser pumpings source 1 is produced
Wavelength is that the continuous pump light of two beams that the wavelength that 976nm and 1976nm thulium-doped fiber lasers pumping source 2 is produced is 1976nm leads to
Cross the first dichroic mirror 3 and synthesize a branch of parallel pump light, pump light is coupled into double clad and mixes Er by coupled lens 5 again3+
In the inner cladding of ZBLAN (fluoride) optical fiber 8, energy level is pumped into by 976nm pump lights4I11/2Particle on 12 is again passed by
1976nm pumpings optical pumping 19 is pumped into energy level4F9/2On 13, add from energy level4S3/2The particle of the spontaneous radiation D24 on 14 and
From energy level4I11/212 spontaneous radiation E26 are to energy level4I13/2Again by Excited-state Absorption B27 to energy level after on 114F9/2On 13
Particle, population inversion is in energy level4F9/213 and energy level4I15/2The red light radiation 28 of 650nm is formed between 10, that is, produces feux rouges
Laser, by mixing Er3+The resonator that second fiber grating 7 and speculum 9 of ZBLAN (fluoride) optical fiber 8 are constituted produces 650nm
Red laser, the final red laser for producing exports by the reflection of the second dichroic mirror 4.
In above example, when the pump light that wavelength is 976nm is individually used, its correspondence uses double-contracting
Layer mixes Er3+ZBLAN (fluoride) optical fiber 8, its corresponding energy level is energy level4I15/210, energy level4S3/214, the green glow of generation swashs
The a length of 525nm of light wave, corresponding to energy level4S3/214 → energy level4I15/210 transition, corresponding is the first fiber grating 6 and reflection
The resonator that mirror 9 is constituted；It is the pump light of 976nm and 1976nm when wavelength is used simultaneously, now its corresponding energy level is energy level4I15/210, energy level4F9/213, the red light wavelength of generation is 650nm, corresponding to energy level4F9/210 → energy level4I15/213 energy levels
Transition, corresponding is the resonator that the second fiber grating 7 is constituted with speculum 9.
As shown in figure 3, the structure of existing visible light fiber laser is：Two diode lasers send 850nm's
Pump light, synthesizes a branch of by polarizing coupler.Synthesis light beam focuses on SMA connectors by condenser lens, is linked by SMA
Device is coupled in the ZBLAN optical fiber that Pr3+/Yb3+ is co-doped with.The ZBLAN optical fiber that Pr3+/Yb3+ is co-doped with is mixed in pumping optical pumping, produces
The mixed light of the green laser of 520nm and the red laser of 653nm.
The present invention is not limited to above-mentioned specific embodiment, it will be appreciated that one of ordinary skill in the art is without creative
Work just can make many modifications and variations with design of the invention.In a word, all technical staff in the art are according to this
The design of invention passes through the available technical side of logical analysis, reasoning, or a limited experiment on the basis of existing technology
Case, all should be in the protection domain being defined in the patent claims.
Claims (3)
1. the changeable visible light fiber laser of a kind of wavelength, it is characterised in that including the laser pump source being sequentially connected,
First dichroic mirror (3) and the second dichroic mirror (4), coupled lens (5), the first fiber grating (6), the second fiber grating (7), double-contracting
Layer mixes Er3+ZBLAN optical fiber (8) and speculum (9)；
It is that laser pumping source includes respectively be connected with the first dichroic mirror (3) and be mutually perpendicular to and different wave length for generation
976nm semiconductor laser pumpings source (1) and 1976nm thulium-doped fiber lasers pumping source (2)；
First dichroic mirror (3) to wavelength for the laser of 976nm is high, to wavelength for the laser of 1976nm is high instead, for by two beams
The vertical pumping light compositing of 976nm and 1976nm is a branch of；
Second dichroic mirror (4) is high to the laser that wavelength is 976nm, 1976nm and 3um, high to feux rouges and green glow anti-, for inciting somebody to action
The las er-guidance output of generation；
Coupled lens (5) for the laser that produces 976nm pump lights or two pumping sources produce through the first dichroic mirror (3)
With the Laser Focusing after the second dichroic mirror (4) synthesis Er is mixed to the double clad3+In the inner cladding of ZBLAN optical fiber (8)；
Speculum (9) is high to green glow and feux rouges anti-, and the light to more than 2um is high；
Double clad mixes Er3+First fiber grating (6) of ZBLAN optical fiber (8) is constituted with speculum (9) mixes Er3+ZBLAN optical-fiber lasers
Device produces the resonator of green laser；Double clad mixes Er3+Second fiber grating (7) of ZBLAN optical fiber (8) and speculum (9) structure
Into mixing Er3+ZBLAN optical fiber lasers produce the resonator of red laser.
2. a kind of changeable visible light fiber laser of glistening light of waves according to claim 1, it is characterised in that the double-contracting
Layer mixes Er3+ZBLAN optical fiber (8) is big core diameter doubly clad optical fiber, and the external diameter of surrounding layer is 300um, and the external diameter of inner cladding is
260um, a diameter of 18um of fibre core.
3. the changeable visible light fiber laser of a kind of wavelength according to claim 1, it is characterised in that described is double
Doped cladding layer Er3+The left side of ZBLAN optical fiber (8) is 8 ° of angles, and right side is 0 ° of angle.
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| CN201710209198.8A CN106785846A (en) | 2017-03-31 | 2017-03-31 | A kind of changeable visible light fiber laser of wavelength |
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| CN201710209198.8A CN106785846A (en) | 2017-03-31 | 2017-03-31 | A kind of changeable visible light fiber laser of wavelength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370983A (en) * | 2020-03-19 | 2020-07-03 | 吉林大学 | Application of erbium-doped indium fluoride-based glass optical fiber in realizing laser output of 3.3 mu m wave band |
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| CN111370983A (en) * | 2020-03-19 | 2020-07-03 | 吉林大学 | Application of erbium-doped indium fluoride-based glass optical fiber in realizing laser output of 3.3 mu m wave band |
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