CN103151700B - A kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export - Google Patents
A kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export Download PDFInfo
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- CN103151700B CN103151700B CN201310060070.1A CN201310060070A CN103151700B CN 103151700 B CN103151700 B CN 103151700B CN 201310060070 A CN201310060070 A CN 201310060070A CN 103151700 B CN103151700 B CN 103151700B
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Abstract
The present invention relates to a kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export.By pumping source, optical coupling system, input mirror, solid laser medium, outgoing mirror and cylindrical mirror mode conversion set of lenses form according to the arrangement of optical path direction order, the plating of input mirror is with saturating to pump light height, to oscillation light high reverse--bias deielectric-coating, and outgoing mirror plating is with the deielectric-coating reflected oscillation light part.Output of laser is the laser with multi-wavelength, and its photon has identical orbital angular momentum, and this angular momentum has tunable characteristic.Laser of the present invention has that cost is low, volume is little, making is simple, adjustment is flexible, different-energy photon exports simultaneously and the advantage such as angular momentum tunable.
Description
Technical field
The present invention relates to a kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export, belong to laser technology field.
Background technology
Along with the development of science and technology, the application of laser is more and more extensive, can say that laser and changing our production and life, improves and promoting our national economy.In the various fields of laser, the laser with angular momentum becomes the emphasis studied in recent years, because its photon has angular momentum, at optical communication, cold atom trapping, dynamic optical stores, quantum calculation and light are pinched etc., and optical field particularly has important demand and application in quantum optices field.Multiwavelength laser exports the advantage of multiple photon simultaneously owing to having, and may 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 produced through mode conversion technology also only has single energy photon.Can only be realized by different wave length laser in combination.
Export and important need and the present situation with all solid state laser of angular momentum having multi-wavelength for current just, we provide a kind of angular momentum tunable full-solid-state laser having multi-wavelength and export.Such laser has that structure is simple, easy and simple to handle, different-energy photon angular momentum is synchronously tunable and can carry out the advantages such as industrialization, for laser family with the addition of the new member of a class.
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 by inputting mirror and outgoing mirror forms, or is made up 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 be have fixed energies pulse laser and there is optics angular momentum, by changing the power of pump light, the consecutive variations of angular momentum can be realized.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 are high, angular momentum tunable.Although this invention angular momentum is adjustable, multi-wavelength can not be realized and export simultaneously.
Summary of the invention
For the current important need of laser and present situation to having multi-wavelength angular momentum, the invention provides a kind of compact conformation, simple to operate, there is the angular momentum tunable full-solid-state laser that multi-wavelength exports.
Technical scheme of the present invention realizes in the following ways.
A kind of angular momentum tunable full-solid-state laser that there is multi-wavelength and export, formed according to the arrangement of optical path direction order 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 is with saturating to pump light height, to oscillation light high reverse--bias deielectric-coating, and outgoing mirror (5) plating is with the deielectric-coating reflected oscillation light part.
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; Preferred pumping source output wavelength is the semiconductor laser diode of the InGaAs of 808nm further, and pump mode is end pumping.
Preferred according to the present invention, described input mirror (3) plating with high thoroughly to pump light, be that other end plated surface is with the deielectric-coating to oscillation light reflectivity >=99% in the plating of input mirror pumping end surfaces with the deielectric-coating to pumping wave light transmission rate >=90% to the deielectric-coating of oscillation light high reverse--bias.
According to the present invention, described outgoing mirror (5) plating refers to deielectric-coating reflect oscillation light part plates to be the deielectric-coating of 2 ~ 20% to oscillation light transmitance at outgoing mirror near the end surface of laser medium.
According to the present invention, described outgoing mirror (5) luffing angle is adjustable, with outgoing mirror vertical axial for references angle adjustable extent is at-5 ° to+5 °.To change resonant cavity Fresnel number, realize the Laser output of not same order pattern further.
According to the present invention, described solid laser medium (4) is the laser material that can produce multiwavelength laser output, is selected from Nd:Lu
2o
3and Nd:Y
3ga
5o
12crystal or pottery, Nd doping content is 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 can not plated film.
Described cylindrical mirror mode conversion set of lenses (6) is the cylindrical mirror that a pair focal distance f is identical, and two cylindrical mirror distances are
f, 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; Cylindrical mirror leads to light end face and can plate with the deielectric-coating to oscillation light high transmission, also can not plated film; Preferably, described cylindrical mirror leads to the plating of light end face 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 the plating of solid laser medium (4) plane of incidence is with to pumping wave light transmission rate >=90%, deielectric-coating to 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 plates on the plane of incidence of solid laser medium (4) with during to pumping wave light transmission rate >=90%, deielectric-coating to oscillation light reflectivity >=99%, this deielectric-coating namely replaces level crossing or concave mirror serves the same role; Now, solid laser medium exit facet plates with the deielectric-coating to oscillation light high transmission, also can not plated film.
The present invention utilizes one to input mirror, one piece of solid laser medium, outgoing mirror and a cylindrical mirror mode conversion set of lenses and can obtain multiwavelength laser and export and the identical and continuously adjustabe of orbital angular momentum entrained by different wave length photon.The present invention, by adjustment outgoing mirror luffing angle or pump light spot size, changes the Fresnel number of resonant cavity to produce the Hermite-Gaussian HG of different order
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 there is important application prospect in optical communication, cold atom trapping, the quantum optices such as dynamic optical stores, quantum calculation and light are pinched.
The angular momentum tunable full-solid-state laser that multi-wavelength of the present invention exports has following advantage:
1. compact conformation.Single laser material has multi-wavelength and exports, and produces multi-wavelength requisite space little than the combination of Single wavelength multi-station laser.
2. simple to operate.Of the present invention need change resonant cavity Fresnel number by regulation output mirror angle and just can change angular momentum entrained by different-energy photon simultaneously, have feature simple to operate.
3. application is wide.The angular momentum tunable full-solid-state laser that multi-wavelength of the present invention exports, there is different-energy photon and carry identical angular momentum and the feature of angular momentum continuously adjustable, this just means at Terahertz, and the storage of optical communication, nonlinear frequency conversion, dynamic optical, quantum calculation, cold atom trapping and light the aspect such as to be pinched and had a wide range of applications.
Accompanying drawing explanation
Fig. 1 is the angular momentum tunable full-solid-state laser structural representation of the twin wavelength laser output of the embodiment of the present invention 1.Wherein: 1 is pumping source, 2 is optical coupling systems, 3 is input mirrors, be coated with, oscillation light high anti-deielectric-coating high thoroughly to pump light, 4 is solid laser mediums, and its plated surface is with the deielectric-coating to pump light and oscillation light high transmission, and 5 is outgoing mirror, be coated with the deielectric-coating of oscillation light part reflection, 6 is cylindrical mirror mode conversion set of lenses.
Fig. 2 is the structural representation of the embodiment of the present invention 2.Wherein inputting mirror (3) is level crossing.
Fig. 3 is the structural representation of the embodiment of the present invention 3.Wherein input mirror (3) to omit, replace solid laser medium (4) (Nd:Lu
2o
3) plane of incidence plates with to pumping wave light transmission rate>=90%, deielectric-coating to oscillation light reflectivity>=99%.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described, but be not limited thereto.
Embodiment 1: the angular momentum tunable full-solid-state laser of twin wavelength laser output
Structure as shown in Figure 1, formed by pumping source (1), optical coupling system (2), input mirror (3), solid laser medium (4), outgoing mirror (5) and the arrangement of cylindrical mirror mode conversion set of lenses (6) order, wherein, solid laser medium (4) is Nd:Lu
2o
3crystal, its two logical light end faces plates 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 plated with the other end of the deielectric-coating to pump light 808nm transmitance>=90%, close laser medium with the deielectric-coating to 1077nm and 1080nm reflectivity>=99%; Outgoing mirror (5) plates near the end surface of laser medium with the part reflecting medium film to 1077nm and 1080nm transmitance being 20%; The focal length of cylindrical mirror mode conversion set of lenses (6) two cylindrical mirror is 50mm, non-plated film on its four logical light end faces.
The semiconductor laser diode of described pumping source (1) to be output wavelength the be InGaAs of 808nm, its pump mode is end pumping.
The concave mirror of described input mirror (3) to be curvature be 200mm, 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 it is 0.6mm that crystal leads to light length.
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, nwhile Mode for Laser exports, obtained by cylindrical mirror mode conversion set of lenses (6) have that angular momentum is fixed, output wavelength is 1077 and 1080nm Laser output.By adjustment outgoing mirror (5) luffing angle-5 ° to+5 °, resonant cavity Fresnel number can be changed, realize the Laser output of not same order pattern further.
The angular momentum tunable full-solid-state laser of 1077nm, 1080nm twin wavelength laser output of the present invention, there is different-energy photon and carry identical angular momentum and the feature of angular momentum continuously adjustable, this just means at Terahertz, and the storage of optical communication, nonlinear frequency conversion, dynamic optical, quantum calculation, cold atom trapping and light the aspect such as to be pinched and had a wide range of applications
Embodiment 2: the angular momentum tunable full-solid-state laser that three-wavelength exports
Structure as shown in Figure 2, with in embodiment 1 unlike solid laser medium (4) with Nd:Y
3ga
5o
12crystal replaces, and its two logical light end faces plate with the anti-reflection film to wavelength light transmitance>=99% near pump light and 1060nm; Its input mirror (3) changed flat mirror into, input mirror (3) pumping end plating with the deielectric-coating to pump light transmitance>=90%, near laser medium the other end plating with the deielectric-coating to reflectivity>=99% near 1060nm; Outgoing mirror (5) plates near the end surface of laser medium with the part reflecting medium film to transmitance near 1060nm being 20%.
The semiconductor laser diode of described pumping source (1) to be output wavelength the be InGaAs of 808nm, 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 it is 0.6mm that crystal leads to light length.
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 1060nm high transmission.
The laser that the present embodiment exports is the angular momentum tunable full-solid-state laser that 1062.1nm, 1060.3nm, 1058.9nm three-wavelength exports.
Regulate pumping source (1) power output, strengthen pump power, realize high-order HG
0, nwhile Mode for Laser exports, obtained by cylindrical mirror mode conversion set of lenses (6) and have that angular momentum is fixed, output wavelength is 1062.1nm, 1060.3nm, 1058.9nm three-wavelength Laser output.By adjustment outgoing mirror (5) angle of pitch-5 ° to+5 °, to change resonant cavity Fresnel number, realize the Laser output of not same order pattern further.
Embodiment 3: the angular momentum tunable full-solid-state laser of twin wavelength laser output
As described in Example 1, difference is: save input mirror (3), solid laser medium (4) is Nd:Lu
2o
3crystal, the plane of incidence of solid laser medium (4) plates with to pump light 808nm transmitance>=90%, deielectric-coating to oscillation light 1077nm and 1080nm light reflectivity>=99%, in order to replace the effect of input mirror (3); The other end is plated film not.Structure as shown in Figure 3.
Claims (3)
1. the angular momentum tunable full-solid-state laser that there is multi-wavelength and export, formed according to the arrangement of optical path direction order 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 is with saturating to pump light height, to oscillation light high reverse--bias deielectric-coating, and outgoing mirror (5) plating is with the deielectric-coating reflected oscillation light part; It is characterized in that, described laser is the angular momentum tunable full-solid-state laser that three-wavelength exports, and described solid laser medium (4) is Nd:Y
3ga
5o
12crystal or pottery, Nd doping content is 0.05-at.% ~ 20-at.%, and solid laser medium length is 0.5mm ~ 50mm;
Described outgoing mirror (5) luffing angle is adjustable, with outgoing mirror vertical axial for references angle adjustable extent is at-5 ° to+5 °;
Described cylindrical mirror mode conversion set of lenses (6) is the cylindrical mirror that a pair focal distance f is identical, and two cylindrical mirror distances are
; Described cylindrical mirror focal distance f is 50mm; By the change action of this set of lenses to light beam, Hermite-Gaussian HG
0npatten transformation is Laguerre Gauss LG
0npattern;
Described pumping source output wavelength is the semiconductor laser diode of the InGaAs of 808nm, and pump mode is end pumping;
Described input mirror (3) is in the plating of input mirror pumping end surfaces with the deielectric-coating to pumping wave light transmission rate >=90%, and other end plated surface is with the deielectric-coating to oscillation light reflectivity >=99%;
Described outgoing mirror (5) plating refers to deielectric-coating reflect oscillation light part plates to be the deielectric-coating of 2 ~ 20% to oscillation light transmitance at outgoing mirror near the end surface of laser medium;
Described cylindrical mirror leads to the plating of light end face with the deielectric-coating to oscillation light high transmission.
2. there is angular momentum tunable full-solid-state laser that multi-wavelength exports as claimed in claim 1, it 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%, deielectric-coating to oscillation light reflectivity >=99%.
3. there is angular momentum tunable full-solid-state laser that multi-wavelength exports as claimed in claim 1, it 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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| CN103151700B true CN103151700B (en) | 2015-12-02 |
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| CN104065418B (en) * | 2014-06-05 | 2016-06-29 | 华中科技大学 | A kind of integrated orbital angular momentum mode transmitter |
| 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 |
| CN111028641B (en) * | 2019-12-10 | 2021-05-28 | 西安交通大学 | Gaussian light comprehensive experiment teaching system and experiment method thereof |
| 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 |
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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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 |
|---|
| direct generation of optical vortex pulses;yongguang zhao, ..etc;《Applied Physics Letters》;20120718;第101卷;附图4、正文第3页左栏第2段至右栏第2段 * |
| spectroscopy and laser performance of Nd:Lu2O3 crystal;liangzhen hao, ..etc;《Optics Express》;20110829;第19卷(第18期);附图1、正文第2部分 * |
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