CN103151700A - Angular momentum tunable full-solid-state laser with multi-wavelength output - Google Patents
Angular momentum tunable full-solid-state laser with multi-wavelength output Download PDFInfo
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- CN103151700A CN103151700A CN2013100600701A CN201310060070A CN103151700A CN 103151700 A CN103151700 A CN 103151700A CN 2013100600701 A CN2013100600701 A CN 2013100600701A CN 201310060070 A CN201310060070 A CN 201310060070A CN 103151700 A CN103151700 A CN 103151700A
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Abstract
The invention relates to an angular momentum tunable full-solid-state laser with multi-wavelength output. The angular momentum tunable full-solid-state laser is formed by arranging a pumping source, an optical coupling system, an input mirror, a solid laser medium, an output mirror and a transformation lens group in a cylindrical lens mode in sequence along the direction of a light path, wherein the input mirror is coated with a dielectric film which is highly euphotic to pumping light and highly reflective to oscillating light, and the output mirror is coated with a dielectric film which is partially reflective to the oscillating light. The output laser is multi-wavelength laser, and photons of the laser have the same orbital angular momentum with a tunable characteristic. The laser disclosed by the invention has the advantages of low cost, small size, simplicity in manufacturing, flexibility in adjustment and the like, different energy photons are simultaneously output, and the angular momentum can be tuned.
Description
Technical field
The present invention relates to a kind of tunable all solid state laser of angular momentum with multi-wavelength output, belong to laser technology field.
Background technology
Along with the development of science and technology, applications of laser is more and more extensive, can say that laser and has changed our production and life, has promoted and promoted our national economy.In the various fields of laser, laser with angular momentum becomes the emphasis of research in recent years, because its photon has angular momentum, the optical field such as pinching at optical communication, cold atom trapping, dynamic optical storage, quantum calculation and light particularly has important demand and application in the quantum optices field.Multiwavelength laser is exported multiple photon simultaneously owing to having advantages of, and can be used for the generation of Terahertz, has the advantage that single wavelength laser does not have, and is also the important directions of laser development all the time.Single wavelength laser only has single energy photon, and the laser with angular momentum that produces through mode conversion technology also only has single energy photon.Can only realize by the different wave length laser in combination.
For exporting and have important need and the present situation of all solid state laser of angular momentum having multi-wavelength at present, we provide a kind of tunable all solid state laser of angular momentum with multi-wavelength output just.That such laser has is simple in structure, easy and simple to handle, different-energy photon angular momentum is synchronous tunable and can carry out the advantage such as industrialization, and family has added the new member of a class for laser.
The CN102684061A(2012.5 mountain is large) relate to a kind of all solid state angular momentum tunable laser of stable pulse energy.Comprise pumping source, optical coupling system, resonant cavity, solid laser medium, saturable absorber, pumping source is semiconductor laser diode, and solid laser medium is doping type laser material Nd:YAG or Nd:YVO4, and saturable absorber is Cr:YAG or GaAs crystal, described resonant cavity is comprised of input mirror and outgoing mirror, or is comprised of the plated film of the solid laser medium plane of incidence and the plated film of saturable absorber exit facet.The laser Output of laser of this invention is to have the pulse laser of fixed energies and have the optics angular momentum, by changing the power of pump light, can realize the continuous variation of angular momentum.The laser of this invention can be used for the aspects such as optical communication, cold atom trapping, dynamic optical storage, quantum calculation.This tunable laser cost is low, volume is little, adjustment is flexible, energy stabilization, peak power is high, angular momentum is tunable.Although this invention angular momentum is adjustable, can not realize that multi-wavelength exports simultaneously.
Summary of the invention
To important need and the present situation of laser with multi-wavelength angular momentum, the invention provides a kind of compact conformation, simple to operate, the tunable all solid state laser of angular momentum with multi-wavelength output at present.
Technical scheme of the present invention realizes in the following ways.
A kind of tunable all solid state laser of angular momentum with multi-wavelength output, formed according to optical path direction is arranged sequentially by pumping source (1), optical coupling system (2), input mirror (3), solid laser medium (4), outgoing mirror (5) and cylindrical mirror mode conversion set of lenses (6), input mirror (3) plating with high thoroughly to pump light, to the deielectric-coating of the high reflection of oscillation light, the deielectric-coating of outgoing mirror (5) plating so that oscillation light is partly reflected.
According to the present invention, described pumping source is semiconductor laser diode (LD), and its output wavelength is the absorbing wavelength for solid laser material; Further preferred pumping source output wavelength is the semiconductor laser diode of the InGaAs of 808nm, and pump mode is end pumping.
Preferred according to the present invention, it is to plate with the deielectric-coating to pumping wave light transmission rate 〉=90% at input mirror pumping end surfaces that described input mirror (3) plates with deielectric-coating high thoroughly to pump light, that the oscillation light height is reflected, and other end plated surface is with the deielectric-coating to oscillation light reflectivity 〉=99%.
According to the present invention, described outgoing mirror (5) plating refers at outgoing mirror near an end surfaces plating of laser medium take the deielectric-coating as 2 ~ 20% to the oscillation light transmitance with the deielectric-coating that oscillation light is partly reflected.
According to the present invention, described outgoing mirror (5) luffing angle is adjustable, take the outgoing mirror vertical axial as benchmark angle adjustable extent at-5 ° to+5 °.To change the resonant cavity Fresnel number, further realize the not Laser output of same order pattern.
According to the present invention, described solid laser medium (4) is selected from Nd:Lu for producing the laser material of multiwavelength laser output
2O
3And Nd:Y
3Ga
5O
12Crystal or pottery, Nd doping content are 0.05-at.% ~ 20-at.%, and solid laser medium length is 0.5mm ~ 50mm.The solid laser medium plane of incidence and/or exit facet can plate with the deielectric-coating to oscillation light and pump light high transmission, also plated film not.
Described cylindrical mirror mode conversion set of lenses (6) is the identical cylindrical mirror of a pair of focal distance f, and two cylindrical mirror distances are
F is by the change action of this set of lenses to light beam, Hermite-Gaussian HG
0nPattern can be exchanged into Laguerre Gauss LG
0nPattern.
Described cylindrical mirror focal distance f is 1 ~ 500mm, is preferably 30 ~ 50mm, more preferably 50mm; The logical light end face of cylindrical mirror can plate with the deielectric-coating to the oscillation light high transmission, also plated film not; Preferably, the logical light end face plating of described cylindrical mirror is with the deielectric-coating to oscillation light transmitance 〉=90%.
According to the present invention, described input mirror (3) is level crossing or concave mirror, or solid laser medium (4) plane of incidence plating is with to pumping wave light transmission rate 〉=90%, to the deielectric-coating of oscillation light reflectivity 〉=99%.Described outgoing mirror (5) level crossing or concave mirror.
When the input mirror (3) of above-mentioned angular momentum tunable laser is that plating is with to pumping wave light transmission rate 〉=90%, to the deielectric-coating of oscillation light reflectivity 〉=99% time on the plane of incidence of solid laser medium (4), this deielectric-coating namely replaces level crossing or concave mirror serves the same role; At this moment, on the solid laser medium exit facet plating with the deielectric-coating to the oscillation light high transmission, also plated film not.
The present invention utilize an input mirror, solid laser medium, outgoing mirror can obtain multiwavelength laser output with a cylindrical mirror mode conversion set of lenses and the entrained orbital angular momentum of different wave length photon identical and adjustable continuously.The present invention changes the Fresnel number of resonant cavity to produce the Hermite-Gaussian HG of different orders by adjusting outgoing mirror luffing angle or pump light spot size
0nPattern.
The different wave length photon that the present invention obtains has identical angular momentum, and the orbital angular momentum of photon along with the change of resonant cavity Fresnel number continuously adjustable.So pinch etc. at optical communication, cold atom trapping, dynamic optical storage, quantum calculation and light and have important application prospect aspect quantum optics.
The tunable all solid state laser of angular momentum of multi-wavelength output of the present invention has following advantage:
1. compact conformation.Single laser material has multi-wavelength output, and is less than single wavelength multi-station laser combination results multi-wavelength requisite space.
2. simple to operate.Of the present invention need change the resonant cavity Fresnel number by the regulation output mirror angle and just can change simultaneously the entrained angular momentum of different-energy photon, have characteristics simple to operate.
3. use wide.The tunable all solid state laser of angular momentum of multi-wavelength output of the present invention, have the advantages that the different-energy photon carries identical angular momentum and angular momentum continuously adjustable, this just means at Terahertz, and optical communication, nonlinear frequency conversion, dynamic optical storage, quantum calculation, cold atom trapping and light the aspect such as are pinched and had widely and use.
Description of drawings
Fig. 1 is the tunable all solid state laser structural representation of angular momentum of the dual wavelength output of the embodiment of the present invention 1.Wherein: the 1st, pumping source, the 2nd, optical coupling system, the 3rd, input mirror, be coated with, oscillation light high anti-deielectric-coating high thoroughly to pump light, the 4th, solid laser medium, its plated surface are with the deielectric-coating to pump light and oscillation light high transmission, and 5 is outgoing mirror, be coated with the deielectric-coating that oscillation light partly reflects, 6 is cylindrical mirror mode conversion set of lenses.
Fig. 2 is the structural representation of the embodiment of the present invention 2.Wherein input mirror (3) is level crossing.
Fig. 3 is the structural representation of the embodiment of the present invention 3.Wherein input mirror (3) omits, and replaces solid laser medium (4) (Nd:Lu
2O
3) on the plane of incidence plating with to pumping wave light transmission rate 〉=90%, to the deielectric-coating of oscillation light reflectivity 〉=99%.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples, but be not limited to this.
Embodiment 1: the tunable all solid state laser of angular momentum of dual wavelength output
Structure as shown in Figure 1, by pumping source (1), optical coupling system (2), input mirror (3), solid laser medium (4), outgoing mirror (5) and arranged sequentially the forming of cylindrical mirror mode conversion set of lenses (6), wherein, solid laser medium (4) is Nd:Lu
2O
3Crystal, on its two logical light end faces, plating is with the anti-reflection film to pump light and oscillation light 1077nm, 1088nm light transmission rate 〉=99%; The plating of input mirror (3) pumping end is to plate with the deielectric-coating to 1077nm and 1080nm reflectivity 〉=99% deielectric-coating of pump light 808nm transmitance 〉=90%, the other end of close laser medium; Outgoing mirror (5) near an end surfaces plating of laser medium take the part reflecting medium film as 20% to 1077nm and 1080nm transmitance; The focal length of cylindrical mirror mode conversion set of lenses (6) two cylindrical mirrors is 50mm, plated film not on its four logical light end faces.
Described pumping source (1) is that output wavelength is the semiconductor laser diode of the InGaAs of 808nm, and its pump mode is end pumping.
Described input mirror (3) is that curvature is the concave mirror of 200mm, and outgoing mirror (5) is level crossing.
Described solid laser medium (4) Nd:Lu
2O
3The neodymium doping content of crystal is 0.5-at.%, and the logical light length of crystal is 0.6mm.
The spacing of two cylindrical mirrors in described cylindrical mirror mode conversion set of lenses (6) is 70.7mm.
Regulate pumping source (1) power output, strengthen pump power, realize high-order HG
0, nMode for Laser output time, by cylindrical mirror mode conversion set of lenses (6) obtain to have that angular momentum is fixed, output wavelength is 1077 and the 1080nm Laser output.By adjusting outgoing mirror (5) luffing angle-5 ° to+5 °, can change the resonant cavity Fresnel number, further realize the not Laser output of same order pattern.
The tunable all solid state laser of angular momentum of 1077nm of the present invention, the output of 1080nm dual wavelength, have the advantages that the different-energy photon carries identical angular momentum and angular momentum continuously adjustable, this just means at Terahertz, and optical communication, nonlinear frequency conversion, dynamic optical storage, quantum calculation, cold atom trapping and light the aspect such as are pinched and had widely and use
Embodiment 2: the tunable all solid state laser of angular momentum of three-wavelength output
Structure as shown in Figure 2, from different in embodiment 1 be that solid laser medium (4) is with Nd:Y
3Ga
5O
12Crystal replaces, and on its two logical light end faces, plating is with the anti-reflection film near wavelength light transmitance 〉=99% pump light and 1060nm; Its input mirror (3) has changed flat mirror into, input mirror (3) pumping end plating with to the deielectric-coating of pump light transmitance 〉=90%,, near the other end plating of laser medium with the deielectric-coating near reflectivity 1060nm 〉=99%; Outgoing mirror (5) near an end surfaces plating of laser medium take the part reflecting medium film as 20% near transmitance 1060nm.
Described pumping source (1) is that output wavelength is the semiconductor laser diode of the InGaAs of 808nm, and pump mode is end pumping.
Described input mirror (3) is level crossing, and outgoing mirror (6) is level crossing.
Described solid laser medium (4) Nd:Y
3Ga
5O
12The neodymium doping content of crystal is 1-at.%, and the logical light length of crystal is 0.6mm.
Described cylindrical mirror mode conversion set of lenses (6), two mirror focal lengths are 50mm, and spacing is 70.7mm, and plated surface is with the deielectric-coating (transmitance 〉=90%) to the 1060nm high transmission.
The laser of the present embodiment output is 1062.1nm, 1060.3nm, the tunable all solid state laser of angular momentum of 1058.9nm three-wavelength output.
Regulate pumping source (1) power output, strengthen pump power, realize high-order HG
0, nIn Mode for Laser output time, obtain to have that angular momentum is fixed, output wavelength is 1062.1nm by cylindrical mirror mode conversion set of lenses (6), 1060.3nm, 1058.9nm three-wavelength Laser output.By adjusting outgoing mirror (5) angle of pitch-5 ° to+5 °, to change the resonant cavity Fresnel number, further realize the not Laser output of same order pattern.
Embodiment 3: the tunable all solid state laser of angular momentum of dual wavelength output
As described in Example 1, difference is: save input mirror (3), solid laser medium (4) is Nd:Lu
2O
3Crystal, plating is with to pump light 808nm transmitance 〉=90%, to the deielectric-coating of oscillation light 1077nm and 1080nm light reflectivity 〉=99%, in order to replace the effect of input mirror (3) on the plane of incidence of solid laser medium (4); The other end is plated film not.Structure as shown in Figure 3.
Claims (10)
1. one kind has the tunable all solid state laser of angular momentum that multi-wavelength is exported, it is characterized in that being formed according to optical path direction is arranged sequentially by pumping source (1), optical coupling system (2), input mirror (3), solid laser medium (4), outgoing mirror (5) and cylindrical mirror mode conversion set of lenses (6), input mirror (3) plating with high thoroughly to pump light, to the deielectric-coating of the high reflection of oscillation light, the deielectric-coating of outgoing mirror (5) plating so that oscillation light is partly reflected.
2. the tunable all solid state laser of angular momentum as claimed in claim 1, is characterized in that described pumping source is semiconductor laser diode, and its output wavelength is the absorbing wavelength for solid laser material; Preferred pumping source output wavelength is the semiconductor laser diode of the InGaAs of 808nm, and pump mode is end pumping.
3. the tunable all solid state laser of angular momentum as claimed in claim 1, it is characterized in that described input mirror (3) plates with the deielectric-coating to pumping wave light transmission rate 〉=90% at input mirror pumping end surfaces, other end plated surface is with the deielectric-coating to oscillation light reflectivity 〉=99%.
4. the tunable all solid state laser of angular momentum as claimed in claim 1 is characterized in that described outgoing mirror (5) plating refers at outgoing mirror near an end surfaces plating of laser medium take the deielectric-coating as 2 ~ 20% to the oscillation light transmitance with the deielectric-coating that oscillation light is partly reflected.
5. the tunable all solid state laser of angular momentum as claimed in claim 1, is characterized in that described outgoing mirror (5) luffing angle is adjustable, take the outgoing mirror vertical axial as benchmark angle adjustable extent at-5 ° to+5 °.
6. the tunable all solid state laser of angular momentum as claimed in claim 1, is characterized in that described solid laser medium (4) is selected from Nd:Lu
2O
3And Nd:Y
3Ga
5O
12Crystal or pottery, Nd doping content are 0.05-at.% ~ 20-at.%, and solid laser medium length is 0.5mm ~ 50mm.
7. the tunable all solid state laser of angular momentum as claimed in claim 1, is characterized in that described cylindrical mirror mode conversion set of lenses (6) is the identical cylindrical mirror of a pair of focal distance f, and two cylindrical mirror distances are
Described cylindrical mirror focal distance f is 1 ~ 500mm, is preferably 30 ~ 50mm, more preferably 50mm.
8. the tunable all solid state laser of angular momentum as claimed in claim 1, is characterized in that the logical light end face plating of described cylindrical mirror is with the deielectric-coating to the oscillation light high transmission.
9. the tunable all solid state laser of angular momentum as claimed in claim 1 is characterized in that described input mirror (3) is the plating of level crossing, concave mirror or solid laser medium (4) plane of incidence with to pumping wave light transmission rate 〉=90%, to the deielectric-coating of oscillation light reflectivity 〉=99%.
10. the tunable all solid state laser of angular momentum as claimed in claim 1, is characterized in that described outgoing mirror (5) level crossing or concave mirror.
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| CN201310060070.1A CN103151700B (en) | 2013-02-25 | 2013-02-25 | A kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export |
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|---|---|---|---|
| CN201310060070.1A CN103151700B (en) | 2013-02-25 | 2013-02-25 | A kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export |
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| CN103151700A true CN103151700A (en) | 2013-06-12 |
| CN103151700B CN103151700B (en) | 2015-12-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065418A (en) * | 2014-06-05 | 2014-09-24 | 华中科技大学 | Integrated orbital angular momentum mode transmitter |
| CN105762636A (en) * | 2016-04-21 | 2016-07-13 | 上海交通大学 | Method for generating femtosecond vortex beam with high spactial intensity contrast |
| CN111028641A (en) * | 2019-12-10 | 2020-04-17 | 西安交通大学 | Gaussian light comprehensive experiment teaching system and experiment method thereof |
| CN113328330A (en) * | 2021-04-22 | 2021-08-31 | 江苏师范大学 | High-purity orbital angular momentum tunable single crystal optical fiber vortex laser |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684061A (en) * | 2012-05-08 | 2012-09-19 | 山东大学 | All solid-state angular momentum tunable laser device with stable pulse energy |
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2013
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684061A (en) * | 2012-05-08 | 2012-09-19 | 山东大学 | All solid-state angular momentum tunable laser device with stable pulse energy |
Non-Patent Citations (2)
| Title |
|---|
| LIANGZHEN HAO, ..ETC: "spectroscopy and laser performance of Nd:Lu2O3 crystal", 《OPTICS EXPRESS》 * |
| YONGGUANG ZHAO, ..ETC: "direct generation of optical vortex pulses", 《APPLIED PHYSICS LETTERS》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065418A (en) * | 2014-06-05 | 2014-09-24 | 华中科技大学 | Integrated orbital angular momentum mode transmitter |
| CN104065418B (en) * | 2014-06-05 | 2016-06-29 | 华中科技大学 | A kind of integrated orbital angular momentum mode transmitter |
| CN105762636A (en) * | 2016-04-21 | 2016-07-13 | 上海交通大学 | Method for generating femtosecond vortex beam with high spactial intensity contrast |
| CN105762636B (en) * | 2016-04-21 | 2019-01-22 | 上海交通大学 | A method of generating the femtosecond vortex beams of high spatial intensity contrast |
| CN111028641A (en) * | 2019-12-10 | 2020-04-17 | 西安交通大学 | Gaussian light comprehensive experiment teaching system and experiment method thereof |
| CN113328330A (en) * | 2021-04-22 | 2021-08-31 | 江苏师范大学 | High-purity orbital angular momentum tunable single crystal optical fiber vortex laser |
| CN113328330B (en) * | 2021-04-22 | 2024-02-02 | 江苏师范大学 | High-purity single crystal fiber vortex laser with tunable orbital angular momentum |
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