CN1685576A - Thin disk laser with large numerical aperture pumping - Google Patents
Thin disk laser with large numerical aperture pumping Download PDFInfo
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- CN1685576A CN1685576A CN 03822635 CN03822635A CN1685576A CN 1685576 A CN1685576 A CN 1685576A CN 03822635 CN03822635 CN 03822635 CN 03822635 A CN03822635 A CN 03822635A CN 1685576 A CN1685576 A CN 1685576A
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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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/042—Arrangements for thermal management for solid state lasers
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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
- H01S3/0627—Construction or shape of active medium the resonator being monolithic, e.g. microlaser
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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
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
- H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
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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
- H01S3/02—Constructional details
- H01S3/04—Arrangements for thermal management
- H01S3/0405—Conductive cooling, e.g. by heat sinks or thermo-electric 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
- H01S3/0604—Crystal lasers or glass lasers in the form of a plate or disc
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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
- H01S3/1618—Solid materials characterised by an active (lasing) ion rare earth ytterbium
Abstract
An optical system has a high power diode pump source and a thin disk gain media. An optical coupler is positioned between the diode pump source and the thin disk gain media. The optical coupler produces a beam with a large numerical aperture incident on the thin disk gain media.
Description
Technical field
The present invention relates to a kind of thin dish gain media that is used for laser and amplifier, more particularly, the present invention relates to a kind of optical system that adopts large-numerical aperture beam pumping gain media.
Background technology
Along with the power order of laser diode and diode laser matrix benefit increases, it is feasible day by day to have a more high-power diode pumping solid laser.Now proposed many schemes pump light effectively has been coupled to solid state gain medium from a plurality of high-power diode rods (bar) or diode bar array.People expect to construct a kind of superpower laser with defect mode quality (mode quality).And along with the increase of laser power, this is challenging.A kind of scheme of high power and defect mode quality that can realize simultaneously is, by Brauch, and Giesen, the 5th of Voss and Wittig invention, thin disk laser structure described in 553, No. 088 patents and the Optical Letters volume20, page713 (1995).
In this thin dish structure, gain media normally several millimeters of diameters, thickness has only the dish of hundreds of micron.It is attached on the fin of cooling surface.This cooling surface is by plated film, in order to reflected pump light and laser beam.Therefore, thin disk laser is the end-pumped design of pump light and laser beam conllinear.If the size of pump mode and zlasing mode is complementary, then just can obtain good mode quality without any efficiency losses.Compare with the profile pump structure, this thin disk laser structure is typical end-pumped design.If this sits with crossing two legs enough thin, then the cooling be one dimension, and thermal gradient also with the laser beam conllinear.Make by the thermal lensing effect of light beam very little.This design is to propose at other end-pumped design of great majority.Because in other end-pumped design of great majority, thermal lensing effect is significant, and must realize the part compensation by the design to laser cavity.
Because pump light must repeatedly pass through gain media, thin dish design is to have increased complexity certainly.Paper " pumping schemes for multi-kW thin disk lasers " by Erhard, Karszewski, Stewen, Giesen, Contag and Voss in Proceedings ofAdvanced Sold State Lasers conference 2000, OSA Trends in OpticsPhotonics Series, Volume 34, page78 tells about, " for such as the such quasi-three-level system of Yb:YAG, laser-activated medium plays an important role to the absorption again of optical maser wavelength.In the end pumping structure, be to have increased pump absorption by increasing laser-activated medium length, can also increase absorption loss again to optical maser wavelength.
Therefore, gross efficiency is restricted in this structure.The method of raising the efficiency is, by reducing crystal length and/or reducing doping content, can reduce absorption loss again and keeps simultaneously the height of pumping radiation is absorbed.As being confirmed in thin dish design, in the end pumping structure, this can only repeatedly realize by active medium by pumping radiation.The author points out that also when using thinner crystal, the number of times that the increase pump light is walked active medium can reach higher efficient.
Pump light is repeatedly walked second reason in addition.In order to keep the one dimension cooling, dish must be thin dish.In addition, the limit of breaking is to weigh with the inverse of disc thickness.Unfortunately, the maximum doping of most of gain medias and pairing absorption maximum are limited.Absorbing one of the strongest gain media is Nd:YVO
4(vanadate).Therefore vanadate is a kind of four-level laser, and is best to the hypersorption of pump light.The vanadate that adopts 1at.% to mix, in order to absorb 86% pumping radiation, requiring pumping radiation to walk 4 times and coil thick is 400 microns.In vanadate, can realize higher Nd doping, but but cause the reduction of life-span and efficient.
Research recently concentrates on repeatedly several design aspects of walking of realizing pump light.In the design of adopting pump light to walk for 16 times, the light that sends from diode bar is typically fiber coupled into the fiber bundle with 0.1 numerical aperture (NA).This pump light is imaged on the dish by a speculum.Remaining pump light is collected by another speculum, and imaging is returned on the dish.Subsequently, adopt one group of 8 speculum to realize that pump light passes through gain media 16 times.Require each speculum enough big, to catch pump beam with 0.1 numerical aperture.
In a kind of alternate design, adopt big parabolic mirror, and replace the speculum of 8 separation in the last design with 8 different segmentation faces of this mirror (segment).Each segmentation face of parabolic mirror must have 0.1 numerical aperture.The parabolic mirror of pumping source (NA＜0.1) that this requirement is brighter or bigger high-NA.Brighter pumping source can produce same spot size with low numerical aperture or numerical aperture constant than small luminous spot dimension.
Two kinds of stoichiometric material of Yb being mixed crystal substrate have recently been provided.First kind, YbAG is the YAG host crystal (host crystal) that is substituted all yttriums by ytterbium.Thereby this crystal is to have the Yb:YAG that 100%Yb mixes.At paper " Laserdemonstration of YbAG and Materials properties of highly dopedYb:YAG " by Patel, Honea, Speth, Payne, Hutcheson and Equall inIEEE Journal of Quantum Electronics, vol.37 has described this crystal among the page 135 (2001).Show that for YbAG the YAG crystal of doping 100%Yb still can obtain not having the good laser crystal of remarkable life-span decline.Most important ground only needs single to walk, and all pump lights can all be absorbed in less than 300 microns dish.
Second kind of stoichiometric crystal that is called as KYbW also is the KYW host crystal that has been substituted all yttriums by ytterbium.At paper " Laser operation of the new stoichiometriccrystal KYb (WO
4)
2", by Klopp et al., in Applied Physics B, vol.74, page185 has described this crystal in (2000).The absorption length of the KYbW that calculates is less than 20 microns.
These highly doped stoichiometric material have represented some new feasible schemes.A kind of scheme is to continue to adopt repeatedly walking of thinner thin dish and pump light.This can improve cooling effect.Other feasible program is to design simpler, system more cheaply.Do not consider as yet in the past that more the pump scheme of high-NA was used for thin disc system, because adopt the high-NA speculum to have any problem for repeatedly walking pumping.High na pump schemes has some advantages, especially aspect reduction system complexity and cost.
First advantage of high na pump schemes is to use the pumping source than low-light level.More high na pump schemes is significant for adopting thin dish gain media, because pump beam is not dispersed in gain media inside.These pumping sources than low-light level can be to have seldom diode stack of beam shaping optics (stack) and diode array.Typical beam shaping optics comprises: in the fast axis collimation lens on each diode bar, make the beam shaping of pump beam symmetrization and two polarization optical elements that diode stack makes up that allow abnormal polorization by the beam quality on change level and the vertical direction.Each beam shaping optics helps to keep the brightness of pumping source, but has increased the cost and the complexity of pumping source.
Second advantage is that non-imaging concentrator (concentrator) can be used to replace imaging system.Lens tube (lens duct) or hollow bucket shape device concentrator can be utilized.The big light beam of the low numerical aperture that these non-imaging concentrators send diode stack change into large-numerical aperture than penlight.This allows to adopt big diode stack, is generally 1 square centimeter, and the interval between its diode bar is used for effective cooling.This concentrator can make beam sizes reduce 4 or 5 times, and the numerical aperture of this light beam can increase same multiple.When requiring that pump beam is transferred to gain media with least cost, hollow bucket shape device concentrator is a preferred version.
The 3rd advantage is that a plurality of pumping sources can incide on the thin dish gain media from different perspectives.Thus can with each independently diode bar aim at pumping point on the gain medias from a plurality of directions.And, get rid of heat easilier from these diode bars that separate.The a plurality of diode stack that move around dish also can be used for increasing power.Each diode stack all has coupler separately, and can from different directions pump beam be sent on the dish.
Need a kind of improved optical system and using method thereof that comprises thin dish gain media.Also need a kind ofly to comprise the thin dish gain media of diode pumping and utilize high na pump schemes to reduce cost and the optical system and the using method thereof of complexity.
Summary of the invention
Therefore, an object of the present invention is to provide a kind of diode-pumped laser and using method thereof with high power and good model.
Another object of the present invention provides a kind of simpler and cheap diode-pumped laser with high power and good model and using method thereof.
Therefore, these and other objects of the present invention are achieved with approaching in the optical system of coiling gain media at a kind of high-power diode pumping source that comprises.Between diode pumping source and thin dish gain media, place optical coupler.The light beam that this optical coupler produces large-numerical aperture incides on the thin dish gain media.
In another embodiment of the present invention, a kind of optical system is provided, comprise the first and second high-power diode pumping sources that produce first and second pump beams at least.A kind of thin dish gain media is provided.Between each diode pumping source and thin dish gain media, place optical coupler.First and second pump beams incide on the thin dish gain media from different directions.
In another embodiment of the present invention, the method for the thin dish of a kind of pumping gain media is to produce a branch of high-power diode pump beam from pumping source.This high-power diode pump beam is by being placed on the optical coupler between diode pumping source and the thin dish gain media.Optical coupler produces a branch of high-NA output beam thus.This high-NA output beam incides on the plane of incidence of thin dish gain media.
In another embodiment of the present invention, a kind of method that is used for materials processing is provided, include but are not limited to: micromachining, rapid shaping, annealing, cutting, cause chemical process, medical application or the like produces a branch of high-power diode pump beam by pumping source.This high-power diode pump beam is by being placed on the optical coupler between diode pumping source and the thin dish gain media.From then on optical coupler produces a branch of high-NA output beam.This high-NA output beam incides on the plane of incidence of thin dish gain media, to produce output light.With this output beam guiding article to be processed.
In another embodiment of the present invention, provide the method for the thin dish of a kind of pumping gain media.Produce first and second pump beams from first and second pumping sources.First and second pump beams are separately by being placed on the optical coupler between diode pumping source and the thin dish gain media, to produce first and second gain media beams.First and second gain media beams incide on the thin dish gain media from different directions.
Description of drawings
Fig. 1 is the schematic diagram that an embodiment of optical system of the present invention is shown, and comprises diode pumping source, coupler, thin dish gain media and fin;
Fig. 2 is the schematic diagram that an embodiment of optical system of the present invention is shown, and comprises two diode pumping sources, respectively carries a coupler and thin dish gain media;
Fig. 3 is the schematic diagram of one embodiment of the invention, comprises diode pumping source, and coupler and thin dish gain media return pump light deflection to thin dish gain media by adopting single speculum, to realize that pump light 4 times is by this thin dish gain media;
Fig. 4 shows the anti-reflection film reflectivity with wavelength and angle variation that calculates;
Fig. 5 shows the high-reflecting film reflectivity with wavelength and angle variation that calculates;
Embodiment
With reference to figure 1, one embodiment of the present of invention are optical systems 10, and it comprises high-power diode pumping source 12 and thin dish gain media 14.Disclose an example of thin dish gain media in No. 5553088 United States Patent (USP), it is for reference to quote this patent at this.Optical coupler 16 is placed between diode pumping source 12 and the thin dish gain media 14.The appropriate distance range that diode pumping source 12 and thin dish gain media are 14 is 10cm to 200cm, does not comprise the fiber lengths that is associated.Optical coupler 16 produces a branch of light beam 18 that incides the large-numerical aperture on the thin dish gain media 14.
In various embodiments, the numerical aperture that incides the light beam 18 on the thin dish gain media 14 is for greater than 0.35, greater than 0.4, greater than 0.5 or the like.
In addition, can select optical coupler 16, the beam sizes of diode pumping source 12 is reduced at least 2 times, more preferably reduce 3 or 4 times.The numerical aperture of the light beam of diode pumping source 12 increases at least 2 times, more preferably increases 3 or 4 times.
Thin dish gain media 14 can have various difformities, including, but not limited to thin disk or thin square plate.Thin dish gain media 14 has the plane of incidence 22 and cooling surface 24.The plane of incidence 22 is meant the surface that light beam 18 is incident thereon, and cooling surface 24 is meant that surface of eliminating heat by it.Two opposite faces of the normally thin dish gain media 14 of the plane of incidence 22 and cooling surface 24, but if adopt such as the such transparent heat sink material of unadulterated YAG, they can be same surfaces.Thin dish gain media 14 can adopt its thickness size more much smaller than the aperture.The suitable dimensions example is including, but not limited to aperture 2mm to 50mm and thickness 10 μ m to 500 μ m.
Thin dish gain media 14 can be made by various different materials, including, but not limited to Yb:YAG, and Yb:KGW, Yb:KYW, Yb:S-FAP, Nd:YAG, Nd:KGW, Nd:KYW, perhaps Nd:YVO
4Thin dish gain media 14 also can be made by semi-conducting material.In order in thin dish gain media 14, to realize high the absorption, can utilize all these stoichiometry gain material as described herein.As an example but be not limited to, the stoichiometry gain material can be stoichiometry Yb
3+Material is as YbAG, KYbW etc.
With reference to figure 2, one embodiment of the present of invention are optical systems 110, and it comprises at least the first and second high-power diode pumping sources 112 and 114, are used to produce first and second pump lights 116 and 118.Thin dish gain media 120 is set.Optical coupler 122 is placed on respectively between diode pumping source 112 and the thin dish gain media 120, and between diode pumping source 114 and thin dish gain media 120.First and second pump lights 116 and 118 incide on the thin dish gain media 120 from different directions.
With reference to figure 3, another embodiment of the present invention is an optical system 210, and it comprises high-power diode pumping source 212 and thin dish gain media 214.Optical coupler 216 is placed between diode pumping source 212 and the thin dish gain media 214.Optical coupler 216 produces the light beam 218 that incides the large-numerical aperture on the thin dish gain media 214.Light beam 218 secondaries are by thin dish gain media 214, and unabsorbed pump light is led by optical coupler 220 and Dan Fanjing 230 and got back to thin dish gain media 214.Light beam 218 passes through gain media the 3rd, the 4th time subsequently.
According to the present invention, can make the coating (coating) that is suitable for the pump beam large-numerical aperture.Such coating can both be applicable to the pumping radiation that diode produces, and also was applicable to the radiation of optical system emitted laser.
Antireflecting coating on the gain media plane of incidence can be made of the individual layer magnesium fluoride.It also can be made up of a plurality of dielectric layers.Fig. 4 (a) show calculate as the function of the wavelength of normal incidence by SiO
2And Ta
2O
5The reflectivity of 7 dielectric layers that form alternately, it is designed to suppress refractive index and is approximately reflection on 2 the thin dish gain media plane of incidence.This coating goes for KYbW and other similar gain media.Remain on below 0.1% in the wave-length coverage of reflectivity more than 1000nm to 1100nm, it allows the wide tunable wave length of optical system, and also can support to form the needed wide wavelength wave spectrum of femtosecond pulse.
Fig. 4 (b) shows, for the non-polarized light of fixed pump pumping wavelength 940nm, as the reflectivity with respect to the identical coating of the function of the incidence angle of thin dish gain media surface normal direction.In 60 ° ranges of incidence angles, reflectivity remains on below 4% in apparent surface's normal direction; For up to 70 ° ranges of incidence angles, reflectivity remains on below 10%.This coating reflectance curve of other pumping wavelengths between 930nm to 950nm is very similar.The pump beam of the cone angle incident from+70 ° to-70 ° is corresponding to sin ((70 °-(70 °))/2)=0.94 numerical aperture.The pump beam of the cone angle incident from+10 ° to+70 ° is corresponding to the numerical aperture of sin ((70 °-10 °)/2)=0.5.
The top that will thicker medium be connected to thin dish gain media 14,120 and 214 also is useful.For example, the thin dish of highly doped Yb:YAG or YbAG can diffusion-bonded arrive unadulterated YAG, and the YAG that do not mix is transparent for the pump beam 18,116,118 and 218 of pump diode emission.In the case, antireflecting coating can be deposited on the plane of incidence of thicker medium.
Highly reflective coatint on the reflecting surface of thin dish gain media 14,120 and 214 also can be made up of a plurality of dielectric layers.It also can comprise other material, such as copper, silver, metals such as gold.In one embodiment, highly reflective coatint can be coated on the back side of thin dish gain media 14,120 and 214, promptly with plane of incidence facing surfaces.Fig. 5 (a) shows and is approximately 2 gain material for refractive index, the reflectivity as the highly-reflective coating that is fit to of normal incidence function of wavelength that is calculated.This design is by 20 SiO that replace
2And Ta
2O
5Dielectric layer and a copper layer are formed.This coating also goes for KYbW and other similar gain media.With in the wave-length coverage of about 1100nm, reflectivity remains on more than 99.98% from 1000nm, and this allows the wide tunable wave length of optical system, and also can support to form the needed wide wavelength wave spectrum of femtosecond pulse.
Fig. 5 (b) shows, for the non-polarized light of fixed pump pumping wavelength 940nm, as 14,120 that record with 214 outsides at thin dish gain media, with respect to the reflectivity of the identical coating of the incidence angle function of thin dish gain media 14,120 and 214 surface normal direction.In 25 ° ranges of incidence angles, reflectivity keeps near 100% in apparent surface's normal direction.For up to 60 ° big incidence angle, reflectivity reduces, but on average still remains on more than 90%.For greater than 60 ° incidence angle, reflectivity is again near 100%.The reflectance curve of this coating other pumping wavelengths between 930nm to 950nm also is very similar.
When optical system 10,110 and 210 is configured to Optical Maser System, laser beam can with the gain region pattern matching (mode-match) of thin dish gain media 14,120 and 214.This can produce good output mode under the situation of not losing efficient.Since one dimension cooling, thermal gradient also with the laser beam conllinear, thereby have little thermal lensing effect.
When optical system 10,110 and 210 was configured to the Optical Maser System of diode pumping, they had various application.As an illustration but be not limited to, the gain media of doping Yb helps constituting mode-locked laser light source.Diode-pumped laser 10,110 and 210 can use semiconductor saturable absorber as the locked mode device, produces subpicosecond pulse at interval.High-power subpicosecond diode-pumped nd yag laser system 10,110 and 210 also can be used for synchronous pump OPO, and produces tunable source of subpicosecond pulses.The lbo crystal of thermal tuning can be as the parametric gain media of OPO.In addition, diode-pumped laser 10,110 and 210 can be used for the clamping system of polarization coupled.
Optical system 10,110 and 210 can be used as amplifier.They can be configured to the booster element in multi-pass amplifier or the regenerative amplifier.Be used for to produce subpicosecond pulse with 1mJ energy to the regenerative amplifier system that the pulse that mode locking oscillator produces is amplified.This amplifier system can be amplified according to chirped pulse, and uses grating pair, before pulse is amplified it is stretched, and amplifies the back in this pulse it is compressed.As an example but be not limited to, diode-pumped systems 10,110 and 210 can be have high-peak power, source of subpicosecond pulses, it is applicable to that the micro-manufactured that requires high-precision processing or reduce heat damage uses.
In addition, diode-pumped systems 10,110 and 210 can be the inner cavity frequency-doubling laser with good spatial mode quality.The LBO of non-strict position phase matched can be used as frequency-doubling crystal, to produce the high power green light light source of power up to 20W to 50W, is used for comprising many application of other lasers of pumping.Because the effects of spatial in the thin dish gain media 14,120 and 214, infrared light or green glow single-frequency light source can be realized, and they also are used for other lasers of pumping and single-frequency OPO except being applied to spectroscopy and tolerance.
The description that do the preferred embodiment of the present invention front is for the purpose of illustration and description.Be not intended to make the present invention to be fully or be confined to disclosed accurate form.Obviously, many modifications and modification are conspicuous for those skilled in the art.Be intended to by following claim and be equal to definite scope of the invention.
Claims (58)
1, a kind of optical system comprises:
The high-power diode pumping source;
Thin dish gain media; And
Be placed on the optical coupler between diode pumping source and the thin dish gain media, the light beam that this optical coupler produces large-numerical aperture is incident on the thin dish gain media.
2, system according to claim 1, wherein the power of pumping source is at least 50W.
3, system according to claim 1, wherein the power of pumping source is at least 200W.
4, system according to claim 1, the numerical aperture that wherein incides the light beam on the thin dish gain media is greater than 0.35.
5, system according to claim 1, the numerical aperture that wherein incides the light beam on the thin dish gain media is greater than 0.4.
6, system according to claim 1, the numerical aperture that wherein incides light beam on the thin dish gain media is greater than 0.5.
7, system according to claim 1, wherein coupler from the bucket shape device, be used for collimating cylindrical lens, several cylindrical lens, beam shaping, lens tube and the beam synthesis that the fast axle of pumping source disperses and select.
8, system according to claim 1 further comprises:
Be coupled to the cooling device on the cooling surface that approaches the dish gain media.
9, system according to claim 1, wherein thin dish gain media is made by the stoichiometry gain material.
10, system according to claim 1, wherein thin dish gain media is by stoichiometry Yb
3+Material is made.
11, system according to claim 10, wherein stoichiometry Yb
3+Material is YbAG.
12, system according to claim 10, wherein stoichiometry Yb
3+Material is KYbW.
13, system according to claim 1, wherein thin dish gain media is made by semi-conducting material.
14, system according to claim 1, wherein diode pumping source is the diode bar that piles up.
15, system according to claim 1, wherein coupler is non-imaging concentrator.
16, system according to claim 15, wherein non-imaging concentrator is a lens tube.
17, system according to claim 1, wherein coupler is a beam homogenizer.
18, system according to claim 15, wherein non-imaging concentrator is configured to, and will change the penlight with large-numerical aperture into from the big light beam with small value aperture of diode pumping source.
19, system according to claim 15, wherein non-imaging concentrator will reduce 2 times at least from the size of the light beam of diode pumping source, and will increase by 2 times at least from the numerical aperture of the light beam of diode pumping source.
20, system according to claim 15, wherein non-imaging concentrator is hollow bucket shape device.
21, a kind of optical system comprises:
Produce at least the first and second high-power diode pumping sources of first and second pump lights;
Thin dish gain media;
Be positioned over first coupler and second coupler between each diode pumping source and the thin dish gain media respectively; And
Wherein first and second pump lights are to incide from different directions on the thin dish gain media.
22, system according to claim 21, wherein optical coupler from first and second diode pumping sources produce all have large-numerical aperture, incide first and second light beams on the thin dish gain media.
23, system according to claim 21, wherein pumping source produces the power of 50W at least.
24, system according to claim 21, wherein pumping source produces the power of 200W at least.
25, system according to claim 21, the numerical aperture that wherein incides first and second light beams on the thin dish gain media is all greater than 0.35.
26, system according to claim 21, the numerical aperture that wherein incides first and second light beams on the thin dish gain media is all greater than 0.4.
27, system according to claim 21, the numerical aperture that wherein incides first and second light beams on the thin dish gain media is all greater than 0.5.
28, system according to claim 21, wherein coupler from for the bucket shape device, be used for collimating cylindrical lens, several cylindrical lens, beam shaping, lens tube and the beam synthesis that the fast axle of pumping source disperses and select.
29, system according to claim 21 further comprises:
Be coupled to the cooling device of the cooling surface of thin dish gain media.
30, system according to claim 21, wherein thin dish gain media is made by the stoichiometry gain material.
31, system according to claim 21, wherein thin dish gain media is by stoichiometry Yb
3+Material is made.
32, system according to claim 31, wherein stoichiometry Yb
3+Material is YbAG.
33, system according to claim 31, wherein stoichiometry Yb
3+Material is KYbW.
34, system according to claim 21, wherein thin dish gain media is made by semi-conducting material.
35, system according to claim 21, wherein diode pumping source is the diode bar that piles up.
36, system according to claim 21, wherein coupler is non-imaging concentrator.
37, system according to claim 36, wherein non-imaging concentrator is a lens tube.
38, system according to claim 21, wherein coupler is a beam homogenizer.
39, system according to claim 36, wherein non-imaging concentrator is configured to, and the big light beam with small value aperture that diode pumping source is sent changes the penlight with large-numerical aperture into.
40, system according to claim 36, wherein non-imaging concentrator reduces 2 times at least with the size of the light beam that diode pumping source sends, and the numerical aperture of the light beam that diode pumping source is sent increases by 2 times at least.
41, system according to claim 36, wherein non-imaging concentrator is hollow bucket shape device.
42, the method for the thin dish of a kind of pumping gain media comprises
Produce high-power diode pumping light beam from pumping source;
The high-power diode pump beam is by the optical coupler between diode pumping source and thin dish gain media;
Form the output beam of high-NA from optical coupler; And
Determine the position of output beam on the thin dish gain media plane of incidence of high-NA.
43, according to the described method of claim 42, wherein the power of pump light is at least 50W.
44, according to the described method of claim 42, wherein the power of pump light is at least 200W.
45, according to the described method of claim 42, the numerical aperture that wherein incides the light beam on the thin dish gain media is greater than 0.35.
46, according to the described method of claim 42, wherein the numerical aperture of high-NA output beam is greater than 0.4.
47, according to the described method of claim 42, wherein the numerical aperture of high-NA output beam is greater than 0.5.
48, according to the described method of claim 42, wherein coupler from the bucket shape device, be used to collimate cylindrical lens, several cylindrical lens, beam shaping that the fast axle of pumping source is dispersed, select in lens tube and the beam synthesis.
49, according to the described method of claim 42, further comprise:
The cooling surface of the thin dish of cooling gain media.
50, according to the described method of claim 42, wherein thin dish gain media is made by the stoichiometry gain material.
51, according to the described method of claim 42, wherein thin dish gain media is by stoichiometry Yb
3+Material is made.
52, according to the described method of claim 51, wherein stoichiometry Yb
3+Material is YbAG.
53, according to the described method of claim 51, wherein stoichiometry Yb
3+Material is KYbW.
54, according to the described system of claim 52, wherein thin dish gain media is made by semi-conducting material.
55, according to the described method of claim 42, wherein diode pumping source is the diode bar that piles up.
56, a kind of material processing method comprises:
Produce high-power diode pumping light from pumping source;
The high-power diode pump light is by the optical coupler between diode pumping source and thin dish gain media;
Generate the output beam of high-NA from optical coupler;
Determine the position of the high-NA output beam on the thin dish gain media plane of incidence, to produce output beam; And
Guide output beam into article to be processed.
57, the method for the thin dish of a kind of pumping gain media comprises
Produce first and second pump lights from first and second pumping sources;
First and second pump lights are by being positioned over first and second optical couplers between each diode pumping source and the thin dish gain media respectively, to produce first and second pump lights; And
Determine to incide from different directions the position of first and second pump lights on the thin dish gain media.
58, according to the described method of claim 57, wherein first and second pump lights are the high-NA light beam.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/232,885 US7027477B2 (en) | 2002-08-30 | 2002-08-30 | Expansion matched thin disk laser and method for cooling |
| US10/233,138 | 2002-08-30 | ||
| US10/233,140 | 2002-08-30 | ||
| US10/233,138 US6891876B2 (en) | 2002-08-30 | 2002-08-30 | Method and apparatus for polarization and wavelength insensitive pumping of solid state lasers |
| US10/232,885 | 2002-08-30 | ||
| US10/233,140 US7003011B2 (en) | 2002-08-30 | 2002-08-30 | Thin disk laser with large numerical aperture pumping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1685576A true CN1685576A (en) | 2005-10-19 |
Family
ID=31982275
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03822635 Pending CN1685576A (en) | 2002-08-30 | 2003-08-11 | Thin disk laser with large numerical aperture pumping |
| CN 03822636 Pending CN1685577A (en) | 2002-08-30 | 2003-08-11 | Method and apparatus for polarization and wavelength insensitive pumping of solid state lasers |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03822636 Pending CN1685577A (en) | 2002-08-30 | 2003-08-11 | Method and apparatus for polarization and wavelength insensitive pumping of solid state lasers |
Country Status (4)
| Country | Link |
|---|---|
| CN (2) | CN1685576A (en) |
| AU (2) | AU2003259753A1 (en) |
| DE (2) | DE10393167T5 (en) |
| WO (2) | WO2004021526A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299665A (en) * | 2019-06-24 | 2019-10-01 | 福建师范大学 | A kind of realization device and method of single-mode laser |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006039074B4 (en) * | 2006-08-09 | 2009-04-02 | Jenoptik Laser, Optik, Systeme Gmbh | Optical arrangement for pumping solid-state lasers |
| DE102006056334B4 (en) * | 2006-11-27 | 2012-12-27 | Jenoptik Laser Gmbh | Fiber laser assembly with regenerative pulse amplification and method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5200947A (en) * | 1989-02-03 | 1993-04-06 | Jujo Paper Co., Ltd. | Optical recording medium, optical recording method, and optical recording device used in method |
| US6347163B2 (en) * | 1994-10-26 | 2002-02-12 | Symbol Technologies, Inc. | System for reading two-dimensional images using ambient and/or projected light |
| US5553088A (en) * | 1993-07-02 | 1996-09-03 | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V. | Laser amplifying system |
| US5790574A (en) * | 1994-08-24 | 1998-08-04 | Imar Technology Company | Low cost, high average power, high brightness solid state laser |
| US5999544A (en) * | 1995-08-18 | 1999-12-07 | Spectra-Physics Lasers, Inc. | Diode pumped, fiber coupled laser with depolarized pump beam |
| US5999554A (en) * | 1996-11-22 | 1999-12-07 | Light Solutions Corporation | Fiber stub end-pumped laser |
| US6304584B1 (en) * | 1998-11-06 | 2001-10-16 | The Regents Of The University Of California | Blue diode-pumped solid-state-laser based on ytterbium doped laser crystals operating on the resonance zero-phonon transition |
| US6347109B1 (en) * | 1999-01-25 | 2002-02-12 | The Regents Of The University Of California | High average power scaleable thin-disk laser |
| US6834070B2 (en) * | 2000-03-16 | 2004-12-21 | The Regents Of The University Of California | Edge-facet pumped, multi-aperture, thin-disk laser geometry for very high average power output scaling |
| US6358387B1 (en) * | 2000-03-27 | 2002-03-19 | Caliper Technologies Corporation | Ultra high throughput microfluidic analytical systems and methods |
-
2003
- 2003-08-11 WO PCT/US2003/025075 patent/WO2004021526A2/en not_active Application Discontinuation
- 2003-08-11 CN CN 03822635 patent/CN1685576A/en active Pending
- 2003-08-11 DE DE10393167T patent/DE10393167T5/en not_active Withdrawn
- 2003-08-11 AU AU2003259753A patent/AU2003259753A1/en not_active Abandoned
- 2003-08-11 DE DE10393190T patent/DE10393190T5/en not_active Withdrawn
- 2003-08-11 AU AU2003278707A patent/AU2003278707A1/en not_active Abandoned
- 2003-08-11 CN CN 03822636 patent/CN1685577A/en active Pending
- 2003-08-11 WO PCT/US2003/025127 patent/WO2004021334A2/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299665A (en) * | 2019-06-24 | 2019-10-01 | 福建师范大学 | A kind of realization device and method of single-mode laser |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10393190T5 (en) | 2005-09-15 |
| WO2004021334A3 (en) | 2004-05-13 |
| WO2004021526A2 (en) | 2004-03-11 |
| WO2004021334A2 (en) | 2004-03-11 |
| AU2003259753A1 (en) | 2004-03-19 |
| CN1685577A (en) | 2005-10-19 |
| AU2003259753A8 (en) | 2004-03-19 |
| DE10393167T5 (en) | 2005-08-25 |
| AU2003278707A1 (en) | 2004-03-19 |
| WO2004021526A3 (en) | 2005-01-13 |
| AU2003278707A8 (en) | 2004-03-19 |
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