CN103746276B - Laser instrument and gain medium component thereof - Google Patents
Laser instrument and gain medium component thereof Download PDFInfo
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- CN103746276B CN103746276B CN201310706211.2A CN201310706211A CN103746276B CN 103746276 B CN103746276 B CN 103746276B CN 201310706211 A CN201310706211 A CN 201310706211A CN 103746276 B CN103746276 B CN 103746276B
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- 238000002834 transmittance Methods 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 238000002835 absorbance Methods 0.000 abstract description 4
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Abstract
The invention discloses a kind of laser instrument and gain medium component thereof.Gain medium component includes thin slice gain media and transparent medium.Owing to the optical surface of transparent medium has 2N the plane of incidence.Therefore, N bundle pump light can be used to carry out pumping simultaneously.N bundle pump light can be incident from N number of adjacent plane of incidence respectively.N number of pumping source can produce pump light respectively, a pump light plane of incidence incidence from which produced by each pumping source, after the absorption of thin slice gain media, and excitation laser.The general power of pump light is equivalent to the power sum of N bundle pump light, and N bundle pump light incidence from different directions can improve the absorbance of thin slice gain media.Comparing the single pumping source pumping of traditional laser instrument, above-mentioned laser instrument is by above-mentioned gain medium component, it is not necessary to use high power, the pumping source of high brightness, and the optical circuit design of complexity i.e. can reach the requirement to laser power.Therefore, above-mentioned laser instrument can be effectively improved quality and the stability of laser output.
Description
Technical field
The present invention relates to laser field, particularly relate to a kind of laser instrument and gain medium component thereof.
Background technology
All solid state laser refers to the solid state laser using semiconductor laser as pumping source, and the most most potential swashs
One of light source.Thin slice gain media in all solid state laser typically uses the laminar material that thickness is the least and lateral dimension is bigger
Expect the gain media as laser.In order to reach required laser power, general laser instrument needs to use high power, highlighted
The pumping source pumping of degree, requires higher to pumping source.And, in order to improve the absorption efficiency of pump light, it is necessary to use structure
Complicated optics mirror-lens system makes pump light Multiple through then out thin slice gain media to improve the absorption efficiency of pump light, and cost is relatively
Height, and regulation complexity.
And typically thin slice gain media is fixed on the red copper cooling heat sink of high heat conductance.Cooling heat sink has coolant
, there is swiftly flowing coolant microchannel in coolant microchannel.Heat first passes through the mode of conduction of heat and is situated between from thin slice gain
Matter is transmitted in cooling heat sink, then carries out heat exchange in coolant microchannel with coolant, then by swiftly flowing cold
But heat is taken away by liquid.Therefore, cooling heat sink can provide cooling for the thin slice gain media back side.When high power operation, hold
It is easily caused cooling dynamics inadequate.Therefore, temperature in thin slice gain media can be caused the highest, and edge's temperature is relatively low, Jin Erzao
Flakiness gain media center outward expansion, forms " bowl-shape " deformation of similar back-off, and then brings thermal lensing effect.
Further, since regulation system complex, the probability of one of them link breaks down strengthens, thus just affects laser instrument
Often operating.Therefore so that the laser output quality of traditional laser instrument and stability are the highest.
Summary of the invention
Based on this, it is necessary to for provide a kind of can be effectively improved laser output quality and the laser instrument of stability and
Gain medium component.
A kind of gain medium component, including:
Thin slice gain media, plate-shaped structure, the one side of described thin slice gain media is rear surface；And
The transparent medium identical with the refractive index of described thin slice gain media, described transparent medium includes the optics of pyramid
Face, described optical surface includes that bottom surface and 2N the edge along bottom surface extend, and the plane of incidence triangular in shape, and N is more than or equal to 2
Integer, described bottom surface fits tightly with the side of the described the most described rear surface of thin slice gain media.
Wherein in an embodiment, described transparent medium also includes circular bottom plate, described bottom surface and described circular bottom plate
Fitting tightly, described thin slice gain media fits tightly away from the side of described bottom surface with described circular bottom plate.
Wherein in an embodiment, it is characterised in that on the described plane of incidence, plating is provided with described pump light and laser high
The high transmittance film layer of transmission.
Wherein in an embodiment, it is characterised in that transparent medium is the rectangular pyramid bodily form, described bottom surface is rectangle.
A kind of laser instrument, the pumping source including passive base, producing pump light, for exporting described pump light
Light output precision, to the reflection of laser height to the highly transmissive laser mirror of pump light and defeated to the laser of pump light height reflection
Appearance, described pumping source, described laser mirror and described laser output mirror be installed on described base, described laser mirror
Being positioned at the front end of described smooth output precision, described laser instrument also includes:
Gain medium component as according to any one of above preferred embodiment, described gain medium component is installed on described
On base；
Described pumping source is N number of, and the pump light that N number of described pumping source produces is respectively from N number of adjacent described plane of incidence
Vertical incidence；
Wherein, described laser output border is oppositely arranged with the plane of incidence one of them described, and described pump light is through described transparent
Medium enters described thin slice gain media, and makes described thin slice gain media excite to produce laser, described laser output mirror with
Described laser mirror forms resonator cavity, and described laser reflects through described rear surface, at described laser output mirror and described laser
Roundtrip between reflecting mirror.
Wherein in an embodiment, also including the chiller being fixed on described base, described chiller includes cold
But cavity, bonnet and the inlet passed in and out for coolant and liquid outlet, described cooling cavities is the hollow posts of both ends open
Shape structure, described bonnet seals the opening of described cooling cavities one end；
Described thin slice gain media is installed on one end of the most described bonnet of described cooling cavities, and by described cooling cavities
One end of the most described bonnet seals, to be formed for housing the airtight of described coolant with described bonnet and described cooling cavities
Cavity, described rear surface is positioned at described closed cavity.
Wherein in an embodiment, the described plane of incidence is more than or equal to the angle of described bottom surface
So that described pump light and described laser surface in the rear are totally reflected, wherein, n1 is that described thin slice gain media is to institute
Stating the refractive index of pump light, n2 is the described coolant refractive index to described pump light, and n1 is more than n2.
Wherein in an embodiment, also including pump light reflecting mirror, described pump light reflecting mirror and two are oppositely arranged
The described plane of incidence in one be arranged in parallel, from the pump light that the plane of incidence another described is incident, surface occurs complete in the rear
After reflection, pump light reflecting mirror described in directive, and reflect on the surface of described pump light reflecting mirror, with by described pump light
Reflex in described thin slice gain media.
Wherein in an embodiment, described base is provided with line slideway, described chiller and described thin slice gain
Medium is slidably mounted on described line slideway, and described thin slice gain media is fixed relative to described chiller.
Wherein in an embodiment, also include that mounting structure, described transparent medium also include circular bottom plate, described installation
Structure includes:
Fixed mount, is slidably located on described line slideway, the plate-shaped structure of described fixed mount, and its upper end is provided with half
The first circular groove, described cooling cavities is contained in described first groove；
Pressing plate, its lower end is provided with semicircular second groove, and described pressing plate is fixed on described fixed mount, so that described cold
But cavity is held between the bottom of described first groove and described second groove；
Installing plate, which is provided with circular mounting hole, and the diameter of described installing hole is less than the diameter of described circular bottom plate, described
Transparent medium is arranged in described installing hole, described installing plate by described circular bottom plate pressure holding in the opening of described cooling cavities
Edge, so that described sealing cavity seals；
Threaded fastener, screws togather with described fixed mount and described installing plate successively, described to be fixed on by described installing plate
On fixed mount.
Above-mentioned laser instrument and gain medium component, owing to the optical surface of transparent medium has 2N the plane of incidence.Therefore, can be same
Shi Caiyong N bundle pump light carries out pumping.N bundle pump light can be incident from N number of adjacent plane of incidence respectively.N number of pumping source can be distinguished
Producing pump light, a pump light plane of incidence incidence from which produced by each pumping source, through the suction of thin slice gain media
After receipts, excitation laser.The general power of pump light is equivalent to the power sum of N bundle pump light, and N bundle pump light is from different sides
The absorbance of thin slice gain media can be improved to incidence.Compare the single pumping source pumping of traditional laser instrument, above-mentioned laser instrument
By above-mentioned gain medium component, it is not necessary to use high power, the pumping source of high brightness, and the optical circuit of complexity designs
Reach the requirement to laser power.Therefore, above-mentioned laser instrument can be effectively improved quality and the stability of laser output.
Accompanying drawing explanation
Fig. 1 is the structural representation of laser instrument in present pre-ferred embodiments；
Fig. 2 is the explosive view of laser instrument shown in Fig. 1；
Fig. 3 is the side view of laser instrument shown in Fig. 1；
Fig. 4 is the structural representation of transparent medium in laser instrument shown in Fig. 1；
Fig. 5 is the structural representation of gain medium component in laser instrument shown in Fig. 1；
Fig. 6 is the index path in the present embodiment in horizontal direction；
Fig. 7 is the index path in the present embodiment on vertical direction.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing
Give presently preferred embodiments of the present invention.But, the present invention can realize in many different forms, however it is not limited to institute herein
The embodiment described.On the contrary, providing the purpose of these embodiments is to make the understanding to the disclosure more thorough
Comprehensively.
It should be noted that when element is referred to as " being fixed on " another element, and it can be directly on another element
Or element placed in the middle can also be there is.When an element is considered as " connection " another element, and it can be to be directly connected to
To another element or may be simultaneously present centering elements.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present invention
The implication that technical staff is generally understood that is identical.The term used the most in the description of the invention is intended merely to describe tool
The purpose of the embodiment of body, it is not intended that in limiting the present invention.Term as used herein " and/or " include one or more phase
Arbitrary and all of combination of the Listed Items closed.
Referring to Fig. 1, Fig. 2 and Fig. 3, the laser instrument 100 in present pre-ferred embodiments includes base 110, pumping source
120, light output precision 130, laser mirror 140, laser output mirror 150, chiller 160, thin slice gain media 170 and thoroughly
Bright medium 180.Wherein, thin slice gain media 170 and transparent medium 180 form gain medium component 101.Transparent medium 180 with
Thin slice gain media 170 is fitted, and the refractive index of the two is identical.
Base 110 plays a supportive role.Base 110 can be made of metal, the most plate-shaped structure.Owing to platy structure has
Bigger lifting surface area, therefore the effective dispersive pressure of energy, so that laser instrument 100 is more stable.
Pumping source 120 is used for producing pump light.Pumping source 120 typically uses laser diode.Light output precision 130 is used for
The pump light that output pumping source 120 produces.The most in the present embodiment, the pump light that pumping source 120 produces is by conduction optical fiber
121 carry out optical fiber coupling output to light output precision 130.It is pointed out that in other embodiments, pumping source 120 produces
Pump light also can pump-coupling.Pump light exports from light output precision 130, focuses on through pump light focusing unit (figure is not marked).
Pump light focusing unit is arranged in pump light focusing unit erector (figure is not marked), and pump light focusing unit erector is fixed on
On the eyeglass installing rack of eyeglass fixing device for installing.
Laser mirror 140 is dichroic mirror, highly transmissive to pump light, and reflects laser height.Laser output mirror 150 is right
Pump light height reflects, to laser part transmission.Laser mirror 140 and laser output mirror 150 are installed on base 110.Laser
Reflecting mirror 140 is positioned at the front end of light output precision 130, and the pump light of light output precision 130 output is through laser mirror 140.
The most in the present embodiment, base 110 is provided with lens fixing board 111, which is provided with eyeglass installing rack 1112.Laser mirror
140 and laser output mirror 150 be respectively arranged in eyeglass installing rack 1112.
Chiller 160 is fixed on base 110.Chiller 160 includes cooling cavities 161, bonnet 163, inlet
165 and liquid outlet 167.Cooling cavities 161 is the hollow columnar structures of both ends open, and bonnet 163 seals cooling cavities 161 one end
Opening.Concrete, bonnet 163 can be one-body molded with cooling cavities 161, it is possible to separates molding with cooling cavities 161, then leads to
Cross the modes such as screw threads for fastening to be tightly connected with cooling cavities 161 one end.Inlet 165 and liquid outlet 167 pass in and out for coolant,
It is internal that coolant enters cooling cavities 161 through inlet 165, then is flowed out by liquid outlet 167, thus takes away heat.Specifically
In the present embodiment, inlet 165 and liquid outlet 167 are located on bonnet 163.Wherein, coolant can be that other are normal for water, liquid nitrogen etc.
Liquid as coolant.It is appreciated that inlet 165 and liquid outlet 167 may also be disposed on the sidewall of cooling cavities 161.
Thin slice gain media 170 is made up of the transparent dielectric material doped with active ions.Concrete, transparent dielectric material
Can be: the one in yttrium-aluminium-garnet (YAG), Gd-Ga garnet (GGG), glass, vanadate, tungstates, pottery.Activate from
Son can be: Yb3+、Nd3+、Tm3+、Ho3+In one or more.After pump light directive thin slice gain media 170, part pumping
The energy of light is absorbed by the active ions in thin slice gain media 170, active ions generation energy level transition, thus produces laser.
See also Fig. 4 and Fig. 5, the plate-shaped structure of thin slice gain media 170.Thin slice gain media 170 is installed on cold
But one end of cavity 161 bonnet 163 dorsad, and one end of cooling cavities 161 bonnet 163 dorsad is sealed, with bonnet 163 and
Described cooling cavities 161 forms the closed cavity (not shown) for housing coolant.Thin slice gain media 170 is towards bonnet
The one side of 163 is rear surface 171, and rear surface 171 is positioned at closed cavity.Therefore.When being full of coolant in closed cavity, thin
Sheet gain media 170 directly contacts with coolant.When laser instrument 100 works, and thin slice gain media 170 produces heat, thin slice
Gain media 170 can directly and coolant carries out heat exchange by rear surface 171.The back side used compared to conventional laser
The type of cooling of microchannel cooling heat sink, thin slice gain media 170 directly carries out heat exchange with coolant and can be greatly improved
Cooling effectiveness, thus when reducing high power operation, the thermal lensing effect of thin slice gain media 170.
Transparent medium 180 and thin slice gain media 170 are made up of the transparent dielectric material as above-mentioned.Wherein, transparent Jie
Undoped p active ions in matter 180.Owing to the lazy weight of active ions produces with the optical characteristics to thin slice gain media 170
Impact.Therefore, transparent medium 180 and thin slice gain media 170 have identical refractive index.
Transparent medium 180 includes optical surface 181 and circular bottom plate 183.Optical surface 181 is one-body molded with circular bottom plate 183.
Optical surface 181 is in pyramid, and optical surface 181 includes that the edge along bottom surface 1814,1814 and 2N, the bottom surface extends, and in triangle
The plane of incidence 1812 of shape.Wherein, N is the integer more than or equal to 2.Wherein, pump light is from the plane of incidence 1812 vertical incidence.Pump light
The overwhelming majority can be entered in thin slice gain media 170 by transparent medium 180.It is therefore not necessary at thin slice gain media 170
Front surface plating set highly transmissive film layer and can realize the maximum utilization to pump light.The most in the present embodiment, the plane of incidence 1812
Upper plating is provided with pump light and laser high transmittance film layer.Therefore, the utilization rate further to pump light can be improved.
In the present embodiment, bottom surface 1814 fits tightly with circular bottom plate 183, thin slice gain media 170 and circular bottom plate
183 fit tightly away from the side of bottom surface 1814.Concrete, thin slice gain media 170 uses the glue-free direct adhering technique of chemistry
(CADB) it is bonded on transparent medium 180.Due to the thickness of junction minimum (100 μm～1500 μm), therefore light is through both
Do not reflect during junction.Additionally, thin slice gain media 170 is also by other modes and circular base such as intermolecular forces
Plate 183 realizes fitting tightly.Being appreciated that in other embodiments, circular bottom plate 183 can be omitted, and bottom surface 1814 increases with thin slice
The side of benefit medium 170 rear surface 171 dorsad directly fits tightly, it is possible to realize its function.
Wherein, pumping source 120 is N number of, and the pump light that N number of pumping source 120 produces is respectively from N number of adjacent plane of incidence
1812 vertical incidence.Laser output border 150 is oppositely arranged with one of them plane of incidence 1812.The pumping that N number of pumping source 120 produces
Light N number of plane of incidence 1812 through transparent medium 180 respectively enters thin slice gain media 170, and makes thin slice gain media 170 excite
To produce laser.Produce laser through rear surface 171 reflect after, directive laser output mirror 150.A part of laser exports, another
Fraction of laser light is in laser output mirror 150 is reflected back thin slice gain media 170, and after the secondary reflection again of rear surface 171, and directive
Laser mirror 140.Laser output mirror 150 and laser mirror 140 form resonator cavity, and laser is at laser output mirror 150 and swashs
Roundtrip between light reflection mirror 140, thus amplification of vibrating further.
N pumping source 120 at most can be used thin slice gain media 170 to be carried out pumping due to laser instrument 100 simultaneously.Compare
The pumping of single pumping source 120, on the one hand can reduce the requirement to pumping source 120 power and brightness.Secondly, multiple pumping sources
120 pumpings from different directions, can improve the utilization rate to pump light.And, the general power of pump light is equal to each pumping source
120 power sums.It is therefore not necessary to use complicated reflex circuit to improve the absorbance of pump light, i.e. can reach power
Demand.
Concrete, laser mirror 140 be arranged in parallel with one of them of N number of adjacent plane of incidence 1812, and laser is defeated
Another exit facet 1812 that appearance 150 and this exit facet 1812 are oppositely arranged is oppositely arranged.Therefore, its of N number of pumping source 120
In one produce pump light through laser mirror 140 directive rear surface 171, and by rear surface 171 reflect after directive laser
Outgoing mirror 150.The pump light coaxial with laser beam returns in thin slice gain media 170 after laser output mirror 150 reflects, thus
Improve the utilization rate to this pump light.
Additionally, the active ions in thin slice gain media 170 are after the energy of absorptive pumping light is activated, the most few one
Part ion is chaotic ion.The generation of laser can not be contributed by chaotic ion, but pure consumed energy, thus cause energy
Loss.Owing to thin slice gain media 170 is directly bonded on transparent medium 180, chaotic ion therein can be via transparent medium
180 derive.Therefore, transparent medium 180 can play suppression amplified spont-aneous emission, the i.e. effect of ASE effect, thus improve and swash
The stability of light device 100.
Wherein, thin slice gain media 170 is n1 to the refractive index of pump light.And the coolant used is liquid, coolant
It is n1 to the refractive index n2 generally less than thin slice gain media 170 of pump light to the refractive index of pump light.When pump light enters thin
Sheet gain media 170, and be more than or equal at the angle of incidence a of rear surface 171Time, pump light is rear
Surface 171 is totally reflected.
Concrete is analyzed as follows, for the satisfied condition that total reflection occurs, angle of incidenceShould meet:
Therefore obtain:
Pump light directive thin slice gain media 170, and be totally reflected in rear surface 171.Unabsorbed pump light warp
Directive laser output mirror 150 after reflection, reflects at laser output mirror 150, and is reflected back in thin slice gain media 170, thin
Sheet gain media 170 carries out absorption again to the energy of pump light, thus improves the utilization rate to pump light.Owing to being produced
Raw laser is coaxial with pump light, therefore laser also can occur full transmitting on rear surface 171.Therefore, laser mirror 140,
Being collectively forming resonator cavity (figure is not marked) between laser output mirror 150 and rear surface 171, laser is in resonator cavity internal reflection, thus shakes
Swing amplification.In resonator cavity, laser between laser mirror 140 and laser output mirror 150 after multiple reflections so that thin
There is the active ions increasing number of transition in sheet gain media 170, thus plays the effect amplifying laser.
In the present embodiment, the plane of incidence 1812 is more than or equal to the angle of bottom surface 1814
During the pump light vertical directive plane of incidence 1812, pump light can be made to greatest extent to enter in transparent medium 180, thus improve pump
The utilization rate of Pu light.And, the light of vertical incidence will not reflect, but after being emitted directly toward thin slice gain media 170
Surface 171.According to geometrical principle, the pump light angle of incidence on surface 171 is equal to the angle of the plane of incidence 1812 with bottom surface 1814.Cause
This, when the angle of the plane of incidence 1812 with bottom surface 1814 is more than or equal toTime, pump light can be made rear
The angle of incidence on surface 171 is more than critical angle, therefore from the pump light of the plane of incidence 1812 vertical incidence and the laser of generation in rear surface
Can be totally reflected on 171.
Owing to being more than or equal at the angle of incidence of rear surface when pump lightTime, pump light
And laser is totally reflected in rear surface 171, therefore set highly reflecting films just without the plating in the rear surface 171 of thin slice gain media 170
The reflection of laser pump light can be realized.Therefore, can eliminate because highly reflecting films cause with thin slice gain media 170 deformation difference
Thermal lensing effect.If being appreciated that, pump light is not hologonied with laser, it is possible to uses and plates reflectance coating in rear surface 171
Mode realize the reflection of pump light and laser.
Concrete the most in the present embodiment, laser mirror 140 and laser output mirror 150 are respectively relative to two and are oppositely arranged
The plane of incidence 1812 be arranged in parallel.Therefore, pump light can carry out the most reciprocal at laser mirror 140 and laser output mirror 150
Reflection, thus improve the utilization rate to pump light further.
In the present embodiment, also include pump light reflecting mirror 102, pump light reflecting mirror 102 with two be oppositely arranged enter
Penetrate in face 1,812 one to be arranged in parallel, from the pump light of another plane of incidence 1812 incidence, rear surface 171 is totally reflected
After, directive pump light reflecting mirror 102, and reflect on the surface of pump light reflecting mirror 102, so that pump light is reflexed to thin slice
In gain media 170.Therefore, the pump light not absorbed by thin slice gain media 170, after the plane of incidence 1812 penetrates, passes through pump
The reflection of Pu light reflection mirror 102 is returned in thin slice gain media 170, so that pump light is carried out by thin slice gain media 170 again
Once absorb, thus improve the utilization rate to pump light.
Further, the most in the present embodiment, pump light reflecting mirror 102 is N-1, N-1 pump light reflecting mirror 102
Parallel with N-1 the plane of incidence 1812 respectively and be oppositely arranged.N-1 pump light reflecting mirror 102 is with N-1 pumping source 120 one by one
Corresponding.The pump light directive rear surface 171 that N-1 pumping source 120 produces, and after rear surface 171 is totally reflected, do not inhaled
Pump light reflecting mirror 102 corresponding to pump light directive received, and it is reflected back thin slice gain by corresponding pump light reflecting mirror 102
In medium 170.The pump light of another one pumping source 120 generation and laser coaxial, then can be reflected back thin by laser beam departure 150
In sheet gain media 170.Therefore, meeting thin slice can be reflected by laser output mirror 150 except the pump light of one of them pumping source 120
Gain media 170, so that outside pump light is absorbed again by thin slice gain media.The pump light that remaining N-1 pumping source 120 sends
After rear surface 171 is totally reflected, it is reflected back thin slice gain media 170 by pump light reflecting mirror 102, so that pump light is increased by thin slice
Benefit medium absorbs again.Therefore, pump light reflecting mirror 102 can further improve the thin slice gain media 170 absorption to pump light
Rate.
In the present embodiment, base 110 is provided with line slideway 113, chiller 160 and thin slice gain media 170 can
It is slidably mounted on line slideway 113, and thin slice gain media 170 is fixed relative to chiller 160.Therefore, by cunning
Dynamic just scalable chiller 160 and the position of thin slice gain media 170.
Further, laser instrument 100 also include mounting structure 190, mounting structure 190 include fixed mount 191, pressing plate 193,
Installing plate 195 and threaded fastener 197.
Fixed mount 191 is slidingly disposed on line slideway 113, the plate-shaped structure of fixed mount 191, and its upper end is provided with half
Circular the first groove (figure is not marked), cooling cavities 161 is contained in the first groove.Pressing plate 193 lower end is provided with semicircular
Two grooves (figure do not mark), pressing plate 193 is fixed on fixed mount 191, so that cooling cavities 161 is held on the first groove and second recessed
Between the bottom of groove.
Installing plate 195 is provided with circular mounting hole 1952, and the diameter of installing hole 1952 is less than the diameter of circular bottom plate 183,
Transparent medium 180 is arranged in installing hole 1952, installing plate 195 by circular bottom plate 183 pressure holding in the opening of cooling cavities 161
Edge, seals so that sealing cavity.
Threaded fastener 197, screws togather with described fixed mount 191 and described installing plate 195 successively, with by solid for installing plate 195
On fixed mount 191.By tightening threaded fastener 197, installing plate 195 can be forced in cooling by circular bottom plate 183 pressure holding
The edge of the opening of cavity 161.
Owing to fixed mount 191 and installing plate 195 are all arranged on line slideway 113, and it is merely able to linearly guide rail 113 and transports
Dynamic.So the power applying fixed mount 191 and installing plate 195 is parallel to line slideway 113.To fixed mount 191 and installing plate
195 force directions applied are contrary, size is identical, and on the same line.Therefore, be conducive to reducing owing to pressure causes thin slice to increase
Benefit stress medium 170 within and deformation, be conducive to the stability of raising laser instrument 100 further.
In the present embodiment, transparent medium 180 is in rectangular pyramid, and bottom surface 1814 is rectangle, and pumping source 120 is 2.
Seeing also Fig. 6 and Fig. 7, transparent medium 180 has 4 planes of incidence 1812, and horizontal direction is oppositely arranged
Two, and two be oppositely arranged on vertical direction.Arrange a branch of pump beam at its horizontal direction plane of incidence 1812 to carry out
Pumping, arranges another bundle pump light in its vertical direction and carries out pumping.It is therefore possible to use thin slice is increased by 2 pumping sources 120 simultaneously
Benefit medium 170 carries out pumping.So, compare single pumping source pumping, can be right to reduce by the superposition of two pumping sources 120
Pumping source 120 power and the requirement of brightness.Secondly, 2 pumping source 120 pumpings from different directions, thin slice gain can be effectively improved
The medium 170 absorption efficiency to pump light.It addition, do not using the pump light refraction-reflection system that structure is complicated, regulation is difficult
In the case of, it becomes possible to realize the thin slice gain media 170 high-selenium corn efficiency to pump light.It is pointed out that at other real
Executing in example, the exiting surface 181 of transparent medium 180 can be hexagonal pyramid body, eight pyramids, ten pyramids etc., corresponding pumping source
120 can be three respectively, four, five etc..
Compared with traditional laser instrument, laser instrument 100 and gain medium component 101 thereof have an at least following advantage:
Owing to having 2N the plane of incidence 1812.Therefore, N bundle pump light can be used to carry out pumping simultaneously.N bundle pump light can divide
Not incident from N number of adjacent plane of incidence 1812.N number of pumping source 120 can produce pump light respectively, and each pumping source 120 is produced
Pump light plane of incidence 1812 from which incident, after the absorption of thin slice gain media 170, excitation laser.Pump light
General power be equivalent to N bundle pump light power sum, and N bundle pump light incidence from different directions can improve thin slice gain
The absorbance of medium 170.Comparing the single pumping source pumping of traditional laser instrument, laser instrument 100 passes through gain medium component
101, it is not necessary to use high power, the pumping source of high brightness, and the optical circuit design of complexity i.e. can reach laser power
Requirement；
The rear surface 171 of thin slice gain media 170 is positioned at closed cavity.When being full of coolant in closed cavity, thin
Sheet gain media 170 directly contacts with coolant.Cooling compared to the back side microchannel cooling heat sink that conventional laser uses
Mode, thin slice gain media 170 can directly and coolant carries out heat exchange.Therefore, cooling effectiveness is greatly improved, reduces height
The thermal lensing effect of thin slice gain media 170 during Power operation；
Additionally, when the pump light angle of incidence in rear surface is more than or equal toTime, pump light
It is totally reflected in rear surface 171.And, laser produced by thin slice gain media is coaxial with pump light, therefore without at thin slice
The rear surface plating of gain media 170 sets highly reflecting films and just can realize the reflection to pump light and laser, thus eliminates because height is anti-
The thermal lensing effect penetrating film and thin slice gain media deformation difference and cause.Therefore, laser instrument 100 can effectively suppress thermal lens
Effect, thus improve quality and the stability of laser output.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a gain medium component, it is characterised in that including:
Thin slice gain media, plate-shaped structure, the one side of described thin slice gain media is rear surface；And
The transparent medium identical with the refractive index of described thin slice gain media, described transparent medium includes the optical surface of pyramid,
Described optical surface includes that bottom surface and 2N the edge along bottom surface extends, and the plane of incidence triangular in shape, and N is whole more than or equal to 2
Number, described bottom surface fits tightly with the side of the described the most described rear surface of thin slice gain media.
Gain medium component the most according to claim 1, it is characterised in that described transparent medium also includes circular bottom plate,
Described bottom surface fits tightly with described circular bottom plate, and described thin slice gain media and described circular bottom plate are away from the one of described bottom surface
Side fits tightly.
Gain medium component the most according to claim 1, it is characterised in that on the described plane of incidence plating be provided with pump light and
The high transmittance film layer that laser is highly transmissive.
Gain medium component the most according to claim 1, it is characterised in that transparent medium is the rectangular pyramid bodily form, the described end
Face is rectangle.
5. a laser instrument, including passive base, produce pump light pumping source, for exporting described pump light
Light output precision, to the reflection of laser height to the highly transmissive laser mirror of pump light and the laser output to the reflection of pump light height
Mirror, described pumping source, described laser mirror and described laser output mirror be installed on described base, described laser mirror position
Front end in described smooth output precision, it is characterised in that described laser instrument also includes:
Gain medium component as described in above-mentioned any one of Claims 1-4, described gain medium component is installed on described base
On；
Described pumping source is N number of, and the pump light that N number of described pumping source produces is vertical from N number of adjacent described plane of incidence respectively
Incident；
Wherein, described laser output border is oppositely arranged with the plane of incidence one of them described, and described pump light is through described transparent medium
Entering described thin slice gain media, and make described thin slice gain media excite to produce laser, described laser output mirror is with described
Laser mirror forms resonator cavity, and described laser reflects through described rear surface, in described laser output mirror and described laser-bounce
Roundtrip between mirror.
Laser instrument the most according to claim 5, it is characterised in that also include the chiller being fixed on described base, institute
Stating chiller and include cooling cavities, bonnet and the inlet passed in and out for coolant and liquid outlet, described cooling cavities is
The hollow columnar structures of both ends open, described bonnet seals the opening of described cooling cavities one end；
Described thin slice gain media is installed on one end of the most described bonnet of described cooling cavities, and by described cooling cavities dorsad
One end of described bonnet seals, to form the confined air for housing described coolant with described bonnet and described cooling cavities
Chamber, described rear surface is positioned at described closed cavity.
Laser instrument the most according to claim 6, it is characterised in that the described plane of incidence is more than or equal to the angle of described bottom surfaceSo that described pump light and described laser surface in the rear are totally reflected, wherein, n1
For the described thin slice gain media refractive index to described pump light, n2 is the described coolant refractive index to described pump light, and
N1 is more than n2,Angle for the described plane of incidence Yu described bottom surface.
Laser instrument the most according to claim 7, it is characterised in that also include pump light reflecting mirror, described pump light reflects
In mirror and two described planes of incidence being oppositely arranged, one be arranged in parallel, from the pump light that the plane of incidence another described is incident,
After described rear surface is totally reflected, pump light reflecting mirror described in directive, and occur anti-on the surface of described pump light reflecting mirror
Penetrate, so that described pump light is reflexed in described thin slice gain media.
Laser instrument the most according to claim 6, it is characterised in that described base is provided with line slideway, described cooling fills
Put and described thin slice gain media is slidably mounted on described line slideway, and described thin slice gain media is relative to described
Chiller is fixed.
Laser instrument the most according to claim 9, it is characterised in that also include that mounting structure, described transparent medium also include
Circular bottom plate, described mounting structure includes:
Fixed mount, is slidably located on described line slideway, the plate-shaped structure of described fixed mount, and its upper end is provided with semicircle
The first groove, described cooling cavities is contained in described first groove；
Pressing plate, its lower end is provided with semicircular second groove, and described pressing plate is fixed on described fixed mount, so that described cooling chamber
Body is held between the bottom of described first groove and described second groove；
Installing plate, which is provided with circular mounting hole, and the diameter of described installing hole is less than the diameter of described circular bottom plate, described transparent
Medium is arranged in described installing hole, described installing plate by described circular bottom plate pressure holding in the limit of the opening of described cooling cavities
Edge, so that described sealing cavity seals；
Threaded fastener, screws togather with described fixed mount and described installing plate successively, described fixing to be fixed on by described installing plate
On frame.
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| CN201310706211.2A CN103746276B (en) | 2013-12-19 | 2013-12-19 | Laser instrument and gain medium component thereof |
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| CN201310706211.2A CN103746276B (en) | 2013-12-19 | 2013-12-19 | Laser instrument and gain medium component thereof |
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| CN104064955B (en) * | 2014-06-13 | 2017-04-05 | 中国科学院西安光学精密机械研究所 | Immersed cooling solid laser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825802A (en) * | 1991-11-25 | 1998-10-20 | Elkins; Robin K. | Optical elements for lasers |
| CN1564400A (en) * | 2004-04-09 | 2005-01-12 | 浙江大学 | Pump method of realizing feedback pregue first class laser output of gain raster distribution |
| CN201478676U (en) * | 2009-08-31 | 2010-05-19 | 福州高意通讯有限公司 | Side-pumped thin-disk laser structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3149030B2 (en) * | 1991-06-13 | 2001-03-26 | 富士通株式会社 | Semiconductor quantum box device and method of manufacturing the same |
| GB0803551D0 (en) * | 2008-02-26 | 2008-04-02 | Microsharp Corp Ltd | Prismatic lenses |
| US9065241B2 (en) * | 2012-05-11 | 2015-06-23 | Massachusetts Institute Of Technology | Methods, systems, and apparatus for high energy optical-pulse amplification at high average power |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825802A (en) * | 1991-11-25 | 1998-10-20 | Elkins; Robin K. | Optical elements for lasers |
| CN1564400A (en) * | 2004-04-09 | 2005-01-12 | 浙江大学 | Pump method of realizing feedback pregue first class laser output of gain raster distribution |
| CN201478676U (en) * | 2009-08-31 | 2010-05-19 | 福州高意通讯有限公司 | Side-pumped thin-disk laser structure |
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