CN109286123B - One kind being based on three paraboloidal disc lasers - Google Patents
One kind being based on three paraboloidal disc lasers Download PDFInfo
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- CN109286123B CN109286123B CN201811002004.8A CN201811002004A CN109286123B CN 109286123 B CN109286123 B CN 109286123B CN 201811002004 A CN201811002004 A CN 201811002004A CN 109286123 B CN109286123 B CN 109286123B
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
- H01S3/0813—Configuration of resonator
- H01S3/0815—Configuration of resonator having 3 reflectors, e.g. V-shaped resonators
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08059—Constructional details of the reflector, e.g. shape
Abstract
The invention discloses one kind to be based on three paraboloidal disc lasers, belong to field of laser device technology, including pump light source, pump optical collimator, disc laser crystal, multiple pump unit, and resonant cavity output unit, wherein, multiple pump unit includes first, second, third parabolic mirror, and first, second correction mirror, disc laser crystal is located at the focal position of the first parabolic mirror, second, third parabolic mirror is symmetrically disposed at the upper and lower of the disc laser crystal, first, second correction mirror is located at second, the focal position of third parabolic mirror, the centre of first parabolic mirror is provided with through-hole building for V-type laser resonant cavity.The present invention is by the improvement to pumping configuration, while guaranteeing to pump number, solves the angle restriction problem of building v-shaped cavity, while realizing high power, the output of high light beam quality laser, improves the flexibility for building resonant cavity.
Description
Technical field
The invention belongs to field of laser device technology, are related to a kind of three paraboloidal multiple pumping systems of Compact Disk, more
Three paraboloidal disc lasers are based in particular it relates to one kind.
Background technique
Disc laser belongs to high-end one of high power solid state laser, this laminar structure (0.2mm~
The thickness of 0.4mm), in such a way that axial face is cooling, the thermal distoftion and thermal lensing effect of laser crystal are significantly reduced, is had
Conducive to the laser output for obtaining high conversion efficiency, high-average power and high light beam quality.However due to laminar geometric form
Shape haves the shortcomings that small to Pumping light absorption length, and in order to improve the absorption efficiency of pump light, multiple pump technology and hot spot are even
Change technology is the core technology of high power disc piece solid laser efficient stable operation.1994, professor A.Giesen proposed
The concept repeatedly pumped, so that the thought of disk is achieved.2003, Steffen Erhard etc., which is proposed, used single parabolic
The structure that the Space Rotating constituted with polygon prism repeatedly pumps.2005, Steffen Erhand etc. changed above scheme
Into the scheme for putting forward to realize the multiple pump technology of light beam Space Rotating based on single parabolic and two large-scale prism, pump is realized
The pumping that Pu light is 32 times, so that pump light is effectively utilized.2008, Zhu Xiao etc. proposed a kind of based on the double throwings of asymmetric conjugate
The multiple pump scheme of object plane realizes being transmitted several times for pump spot, pumps the angle of number and laser crystal and correction mirror
It is related.2011, Zhu Guangzhi etc. proposed to reflect refrative mirror using 180 degree to realize pumping number on the basis of above scheme
Further increase.
Above-mentioned multiple pump technology may be used to construct the disc laser of general v-shaped cavity.Wherein Steffen
The angle folding of v-shaped cavity degree variation, the scheme of Zhu Xiao et al. from 0 degree to 22, which may be implemented, in the scheme of Erhand et al. may be implemented V
Degree variation from 20 degree to 40 of the angle folding of type chamber.But when building multipass disk crystal oscillator cavity, by above-mentioned angle system
About, above-mentioned multiple pump technology is all inconvenient to the lumen type for being used to construct this complexity.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of novel paraboloidal based on three
Disc laser, it is intended that while guaranteeing to pump number, solving building v-shaped cavity by the improvement to pumping configuration
Angle restriction problem, the pumping configuration based on three parabolic mirrors is set, the light passing in pumping configuration for laser output
Aperture becomes larger, and thus while realizing high power, the output of high light beam quality laser, improves the flexibility for building resonant cavity.
To achieve the above object, according to one aspect of the present invention, it provides a kind of based on three paraboloidal disc lasers
Device, including pump light source, pumping optical collimator, disc laser crystal, multiple pump unit and resonant cavity output unit；Its
In,
The pump light source is incident to after the pumping optical collimator is executed and collimated described more for emitting pump light
Secondary pump unit；
The multiple pump unit includes the first, second, third parabolic mirror and the first, second correction mirror,
In, the disc laser crystal, the back side plating of the disc laser crystal is arranged in the focal point of first parabolic mirror
There is a high-reflecting film, front is coated with high transmittance film, and the optical axis of installation normal and multiple pump unit coincides or there are certain installations
Angle α, second, third described parabolic mirror are symmetrically disposed at the upper surface of described disc laser crystal and in the following, second, the
The height of three parabolic mirrors is no more than the height of first parabolic mirror, the first, second, third parabolic reflector
The symmetry axis of mirror in the same plane, and is parallel to each other, and second parabolic mirror is equipped with the first pumping incident light hole；
First parabolic mirror position symmetrical above and below is respectively arranged with second, third through-hole, and described second is logical
Hole is for installing first correction mirror, the focus of corresponding second parabolic mirror in the position of second through-hole, and described the
For three through-holes for installing second correction mirror, the position of the third through-hole corresponds to the focus of third parabolic mirror；Institute
The optical axis of the installation normal and the multiple pump unit of stating the first, second correction mirror coincides or is respectively present certain installation
Angle β, γ；
The centre of first parabolic mirror is provided with first through hole, for building for laser resonant cavity；It is described
Resonant cavity output unit collectively forms V-type laser resonator by the first through hole and the disc laser crystal, for real
The multiple oscillation of existing pump light, amplification, and execute laser output.
Preferably, it is heat sink that metallic copper is provided on the disc laser crystal, for carrying out to the disc laser crystal
Heat dissipation.
Preferably, the third parabolic mirror is equipped with the second pumping incident light hole.
Preferably, when there are certain installations for the optical axis of the installation normal of the disc laser crystal and multiple pump unit
When angle α, which meets: 0 π/4 < α <.
Preferably, when there are certain peaces for the optical axis of the installation normal of first correction mirror and the multiple pump unit
When clamping angle beta, which meets: 0 π/4 < β <；Installation normal and the multiple pump unit when second correction mirror
Optical axis there are when certain installation angle γ, which meets: 0 π/4 < γ <.
Preferably, the resonant cavity output unit includes laser total reflective mirror and laser output mirror, and is swashed with corresponding disk
Luminescent crystal collectively forms V-type laser resonator.
Preferably, a part is cut away on the left of second parabolic mirror, right angle reflection rib is placed in the part cut away
Mirror, the right-angle surface of the right-angle reflecting prism is towards first parabolic mirror.
Preferably, first, second correction mirror is further equipped with cooling element, and the cooling element is cooling using hydraulic shock
Technology realizes the cooling to the first, second correction mirror.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1, the present invention is single using the multiple pumping of three parabolic mirrors, disc laser crystal and two correction mirror compositions
Member realizes being transmitted several times for controllable pump light, realizes high power, the output of high light beam quality laser, meanwhile, it can to pump
First through hole aperture in the structure of Pu for laser output becomes larger, so that v-shaped cavity angle folding can when building common v-shaped cavity
Variation, can be achieved at the same time laser in the case where big angle folding and small angle folding in polarizers of big angle scope (0 degree to 40 degree)
Resonant cavity is built, and the flexibility for building resonant cavity is improved, and is conducive to the output of high-peak power laser；It can be more easily
The more repeatedly round-trip resonant cavity of number is built, the output power and delivery efficiency of laser are improved；
2, pump light is corrected by double correction mirrors, the distortion of pumping optical transmission process can be improved, improve disk
The uniformity of the pump light of plane of crystal；
3, three paraboloids disc laser overall dimensions according to the invention are compact, mechanical structure is simple and is conveniently adjusted,
Lighter weight is therefore particularly suitable for industrial application.
Detailed description of the invention
Fig. 1 is embodiment 1 based on three paraboloidal disc laser structural schematic diagrams；
Fig. 2 is the V-type laser resonator schematic diagram of embodiment 1；
Fig. 3 is the pumping light path schematic diagram of embodiment 1；
Fig. 4 a is in the case of through-hole b1 incident pump light, to pump optical path on the first parabolic mirror a1 in embodiment 1
Mark precedence diagram；
Fig. 4 b is in embodiment 1, in the case of through-hole b1 incident pump light, the second parabolic mirror a2, and third parabolic
Optical path mark precedence diagram is pumped on the reflecting mirror a3 of face；
Fig. 4 c is in embodiment 1, from pumping optical path on the first parabolic mirror a1 in the case of through-hole b2 incident pump light
Mark precedence diagram；
Fig. 4 d is in embodiment 1, and from through-hole b2 incident pump light, the second parabolic mirror a2, third is thrown
Optical path mark precedence diagram is pumped on parabolic mirror a3；
Fig. 5 a is in embodiment 2, and the spatial relation of right-angle reflecting prism a9 and the second parabolic mirror a2 are illustrated
Figure；
Fig. 5 b is the position dimension relational graph of right-angle reflecting prism a9 and the second parabolic mirror a2 in embodiment 2；
Fig. 5 c is in the case of through-hole b1 incident pump light, to pump optical path on the first parabolic mirror a1 in embodiment 2
Mark precedence diagram；
Fig. 5 d is in embodiment 2, in the case of through-hole b1 incident pump light, the second parabolic mirror a2, and third parabolic
Optical path mark precedence diagram is pumped on face reflecting mirror paraboloid a3 and right-angle reflecting prism prism a9.
In all the drawings, identical appended drawing reference is used to denote the same element or structure, in which:
A1, the first parabolic mirror；A2, the second parabolic mirror；A3, third parabolic mirror；A4, disk swash
Luminescent crystal；A5, the first correction mirror；A6, the second correction mirror；A7, laser total reflective mirror；A8, laser output mirror；A9, right angle reflect rib
Mirror；B1, the first pumping incident light hole；B2, the second pumping incident light hole；B3, first through hole；C1, pump light；C2, laser.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Term " first ", " second ", " third " " the 4th " in description and claims of this specification etc. are to be used for
Different objects are distinguished, not for description particular order.
The present invention provides a kind of based on three paraboloidal disc lasers, including pump light source, pumping optical collimator, disk
Laser crystal, multiple pump unit and resonant cavity output unit；Wherein,
Pump light source is incident to multiple pump unit for emitting pump light, and after pumping optical collimator executes collimation；
Multiple pump unit includes the first, second, third parabolic mirror and the first, second correction mirror, wherein
Disc laser crystal is arranged in the focal point of first parabolic mirror, its pump light of disc laser crystal is incident to be positive on one side
Face, another side are the back side, and the back side is coated with to pump light and the high anti-film layer i.e. high-reflecting film of output laser, and front is coated with to pumping
The optical axis of light and the high saturating film layer, that is, high transmittance film of output laser, installation normal and multiple pump unit coincides or exists certain
Installation angle α (0 π/4 < α <).Second, third parabolic mirror is symmetrically disposed at the upper surface of disc laser crystal under
Face, the height of second, third parabolic mirror are no more than the height of the first parabolic mirror, the first, second, third parabolic
The symmetry axis of face reflecting mirror in the same plane, and is parallel to each other, and three parabolic mirror surfaces are coated with to pump light
Highly reflecting films.Second parabolic mirror is equipped with the first pumping incident light hole, and pump light is single into repeatedly pumping through entrance aperture
Member；Optionally, the second pumping incident light hole also is provided on third parabolic mirror, pump light enters from two entrance aperture at this time
Multiple pump unit.
First parabolic mirror position symmetrical above and below is respectively arranged with second, third through-hole, and the second through-hole is for pacifying
The first correction mirror, the focus of corresponding second parabolic mirror in the position of the second through-hole are filled, third through-hole is rectified for installing second
Telescope direct, the position of third through-hole correspond to the focus of third parabolic mirror；The installation normal of first, second correction mirror and repeatedly
The optical axis of pump unit coincides or is respectively present certain installation folder angle beta, γ (π/4 0≤β < π/4,0≤γ <)；
The centre of first parabolic mirror is provided with first through hole, for building for laser resonant cavity；Resonant cavity is defeated
Unit collectively forms V-type laser resonator by first through hole and disc laser crystal out, for realizing the multiple vibration of pump light
It swings, amplify, and execute laser output.
In the embodiment of the present invention, resonant cavity output unit includes laser total reflective mirror and laser output mirror, and with corresponding dish
Piece laser crystal collectively forms V-type laser resonator.
By conceiving above, pump light multiple reflections between three parabolic mirrors, and utilization disc laser crystal,
The realization of the angle of two correction mirrors and optical axis moves horizontally, and can make pump light multipass disc laser crystal, to allow
Pump light is adequately absorbed.Further, there is biggish aperture first through hole on the first parabolic mirror, so that
Laser resonator builds enhanced convenience, and can be used to build complicated multiple round-trip resonant cavity.The knot of next double correction mirror
Structure also can preferably eliminate pumping optical transmission process in distortion, it is highly efficient, neatly mode come realize laser export, favorably
In the laser output for realizing high power, high efficiency and high light beam quality.
As an alternative embodiment, it is heat sink to be provided with metallic copper on disc laser crystal, for the disk
Laser crystal radiates.
As an alternative embodiment, cutting away a part on the left of the second parabolic mirror, the part cut away is put
Set right-angle reflecting prism, the right-angle surface of right-angle reflecting prism is towards first parabolic mirror.
As an alternative embodiment, the first, second correction mirror is further equipped with cooling element, which is used
Hydraulic shock is cooling or TEC cooling technology realizes the cooling to the first, second correction mirror.
It is provided by the invention to be based on three paraboloidal disc lasers, using three parabolic mirrors, disc laser crystal
With the multiple pump unit of two correction mirrors composition, being transmitted several times for controllable pump light is realized, realizes high power, high beam
Quality laser output, meanwhile, the first through hole aperture in pumping configuration for laser output can be made to become larger, thus building
When common v-shaped cavity, v-shaped cavity angle folding can the variation in polarizers of big angle scope (0 degree to 40 degree), can be achieved at the same time and fold greatly
Building for laser resonator in the case where angle and small angle folding, improves the flexibility for building resonant cavity, is conducive to peak value
The output of power laser.
Below in conjunction with attached drawing and example, the present invention is described in further detail.
Embodiment 1:
As shown in Figure 1, being based on three paraboloidal disc lasers, including pump light source, pumping optical collimator, disc laser
Crystal, multiple pump unit and resonant cavity output unit, wherein
Semiconductor laser stacks, the angle of divergence and light of this light beam in fast axle and slow-axis direction for example can be selected in pump light source
Spot size is different, and beam quality is poor.The light beam that it is issued obtains pump light c1 simultaneously after pumping optical collimator collimation
It is incident to multiple pump unit as shown in fig. 1.According to cylindrical mirror shaping, obtained is rectangular light spot, wherein working as fast axle
When equal with the angle of divergence of slow axis, a rectangular light spot is formed in disc laser crystal a4；According to be partly leading with tail optical fiber
Body laser, the then pump light after collimating are round light beam.
Disc laser crystal a4 by welding or bonding pattern be connected in metallic copper it is heat sink on, disc laser crystal a4 and gold
Belong to the heat sink composition disk crystal unit of copper.Disc laser crystal a4's is coated on one side to pump light and the high anti-film of output laser
In addition layer is coated on one side to pump light and the high saturating film layer of output laser, and its thickness may be selected to be 0.2~0.4mm, diameter
For 5~20mm.
Multiple pump unit is mainly anti-by the first parabolic mirror a1, the second parabolic mirror a2, third paraboloid
Penetrate mirror a3 and the first correction mirror a5 and the second correction mirror a6 composition.First correction mirror a5 and the second correction mirror a6 is located at
The focal point of two parabolic mirror a2 and third parabolic mirror a3.It is anti-that disk crystal unit a4 is placed in the first paraboloid
Penetrate the focal point of mirror a1.Second parabolic mirror a2 and third parabolic mirror a3 usually has an identical focal length, and first
The focal length of parabolic mirror a1 can be identical with them, can also be different.Through-hole there are three on first parabolic mirror a1,
Intermediate first through hole b3 is built for V-type laser resonator, and upper and lower two through-holes are respectively used to fixed and placement first and rectify
Telescope direct a5 and the second correction mirror a6.Second parabolic mirror a2 is equipped with the first pumping incident light hole b1, is used for pump light c1
It is incident.
For the ease of the narration of embodiment, right hand rectangular coordinate system is established in space, with disk crystal front surface center
With origin o excessively and first is parallel to using the direction of the center vertical line of the first parabolic mirror a1 as x-axis for coordinate origin o
The direction of the line at the center incident light hole b1 and the second pumping center incident light hole b2 is pumped as y-axis direction, perpendicular to upper
The direction for stating x-axis and y-axis is z-axis direction.Wherein positive direction of the x-axis is set to from disc laser crystal a4 to parabolic mirror a1's
Direction, positive direction of the y-axis are set to the direction from disc laser crystal a4 to parabolic mirror a2.And it is parallel for defining horizontal direction
In the direction of the plane of xoz, vertical direction is the direction perpendicular to xoz plane.
As shown in Fig. 2, resonant cavity output unit includes total reflective mirror a7 and outgoing mirror a8, outgoing mirror a8 has certain transmission
Rate, so that a part of laser can be exported from outgoing mirror a8.Total reflective mirror a7 and outgoing mirror a8, disc laser crystal a4 constitute V-type and swash
Optical cavity.
In the present embodiment, third parabolic mirror a3 is equipped with the second pumping incident light hole b2, for other pumpings
Light incidence is pumped by branch, and the pump light that higher power may be implemented injects multiple pump unit.Second pumping incident light hole
B2 is optional setting, when being not provided with the second pumping incident light hole b2, single channel pump light c1 can be improved and pass through disc laser crystalline substance
The number of body a4.
When laser works:
Respectively enter pump light all the way from the first pumping incident light hole b1 and the first pumping incident light hole b2 two-way.
As shown in Figure 3a, the optic path path of the pump light c1 of the first pumping incident light hole b1 incidence is as follows: pump light
C1 is incident in parallel from the first pumping incident light hole b1, into multiple pump unit, is focused on by the first parabolic mirror a1
On disc laser crystal a4, then it is reflected on the first parabolic mirror a1, is then incident on third parabolic reflector in parallel
It, can by the size of adjustable inclination since the central axis and x-axis direction of disc laser crystal a4 is there are an inclination alpha on mirror a3
So that pump light can deviate original xoy plane when being incident on third parabolic mirror a3, i.e., have one in a z-direction
A displacement, so as to avoid the position of the second pumping incident light hole b2.Then it focuses on the second correction mirror a6, then reflects
Onto third parabolic mirror a3, then exiting parallel is to the first parabolic mirror a1, and focuses on disc laser
On crystal a4, it is then reflected into the first parabolic mirror a1, then exiting parallel then gathers to the second parabolic mirror a2
It on coke to the first correction mirror a5, and is reflected on the second parabolic mirror a2, due to the central axis of the first correction mirror a5
Direction and x-axis direction there are angle of inclination beta, the second correction mirror a6 central axis direction and x-axis direction there are tilt angle gamma, can to pump
Pu light is reflected into the second parabolic mirror a2 again and initial position to have a horizontal direction mobile, avoid pump light from
Former entrance port outgoing, so as to complete primary periodically transmission.The above are pump lights in multiple pump unit and disc laser
A BTU Basic Transmission Unit between crystal.Pump light c1 passes through BTU Basic Transmission Unit above every time can be in disc laser
Crystal a4 reflects twice.Consider that pump light initially enters disc laser crystal, so every time when reflecting on disc laser crystal a4
It is reflected by the high-reflecting film at the back side, then is emitted by disc laser crystal a4 afterwards, so altogether twice by disc laser crystal.
So pump light c1 just passes through disc laser crystal 4 times by BTU Basic Transmission Unit above every time.
As shown in Figure 3b, the optic path path of the pump light c1 of the second pumping incident light hole b2 incidence is as follows: the first pump
The optic path path of the pump light c1 of Pu incident light hole b1 incidence is as follows: pump light c1 is parallel from the first pumping incident light hole b2
Incidence is focused on disc laser crystal a4 by the first parabolic mirror a1, is then reflected into multiple pump unit
It on first parabolic mirror a1, is then incident in parallel on the second parabolic mirror a2, due to disc laser crystal a4's
There are an inclination alphas for central axis and x-axis direction, pump light can be made to be incident on the second paraboloid by the size of adjustable inclination
Original xoy plane can be deviateed when on reflecting mirror a2, i.e., there is a displacement in a z-direction, enter to avoid the first pump light
The position of perforation b1.Then it focuses on the first correction mirror a5, is then reflected on the second parabolic mirror a2, then in parallel
It is emitted to the first parabolic mirror a1, and is focused on disc laser crystal a4, it is anti-to be then reflected into the first paraboloid
Mirror a1 is penetrated, then exiting parallel then focuses on the second correction mirror a6 to third parabolic mirror a3, and is reflected into
On third parabolic mirror a3, since the central axis direction and x-axis direction of the first correction mirror a5 is there are angle of inclination beta, the second correction
Mirror a6 central axis direction and x-axis direction there are tilt angle gammas, pump light can be made to reflect back into third parabolic mirror a3
A horizontal direction movement is had with initial position, pump light is avoided and is emitted from former entrance port, so as to complete a period
The transmission of property.The BTU Basic Transmission Unit that the above are pump lights between multiple pump unit and disc laser crystal.Pumping
Light c2 can reflect twice every time by BTU Basic Transmission Unit above in disc laser crystal a4.Consider to swash in disk every time
When reflecting on luminescent crystal a4, pump light initially enters disc laser crystal, is then reflected by the high-reflecting film at the back side, then pass through dish
Piece laser crystal a4 outgoing, so altogether twice by disc laser crystal.So pump light c2 pass through every time it is above basic
Transmission unit just passes through disc laser crystal 4 times.
Illustrate the entire transmission process of pump light below with reference to specific schematic diagram, Fig. 4 a is to enter from through-hole b1 i.e. the first pump light
In the case of perforation b1 incident pump light, optical path mark precedence diagram is pumped on parabolic mirror a1；Fig. 4 b is to pump from through-hole b1 incidence
In the light situation of Pu, optical path mark precedence diagram is pumped on parabolic mirror a2, parabolic mirror a3；Serial number in figure is successively led to
Cross parabolic mirror a1, parabolic mirror a2, parabolic mirror a3 serial number, and from through-hole b1 incident pump light feelings
It is as follows that the position that optical transmission process is successively passed through is pumped under condition: b1 (position 1) → a1 (position 2) → a4 → a1 (position 3) → a3
(position 4) → a6 → a3 (position 5) → a1 (position 6) → a4 → a1 (position 7) → a2 (position 8) → a5 → a2 (position 9) →
A1 (position 10) → a4 → a1 (position 11) → a3 (position 12) → a6 → a3 (position 13) → a1 (position 14) → (position a4 → a1
Set 15) → a2 (position 16) → a5 → a2 (position 17) → a1 (position 18) → a4 → a1 (position 19) → a3 (position 20) → a6
→ a3 (position 21) → a1 (position 22) → a4 → a1 (position 23) → a2 (position 24) → a5 → a2 (position 25) → (position a1
26) → a4 → a1 (position 27) → a3 (position 28) → a6 → a3 (position 29) → a1 (position 30) → a4 → a1 (position 31) →
A2 (position 32) → a5 → a2 (position 33) → a1 (position 34)
Fig. 4 c be from the case of through-hole b2 incident pump light on the first parabolic mirror a1 pump optical path mark precedence diagram；Figure
4d is the second parabolic mirror a2 in the case of pumping incident light hole b2 incident pump light from through-hole b2 i.e. second, third parabolic
Optical path mark precedence diagram is pumped on the reflecting mirror a3 of face.Serial number in figure passes sequentially through parabolic mirror a1, parabolic mirror
A2, parabolic mirror a3 serial number, and pump what optical transmission process was successively passed through in the case of through-hole b1 incident pump light
Position is as follows: b2 (position 1) → a1 (position 2) → a4 → a1 (position 3) → a2 (position 4) → a5 → a2 (position 5) → (position a1
Set 6) → a4 → a1 (position 7) → a3 (position 8) → a6 → a3 (position 9) → a1 (position 10) → a4 → a1 (position 11) → a2
(position 12) → a5 → a2 (position 13) → a1 (position 14) → a4 → a1 (position 15) → a3 (position 16) → (position a6 → a3
17) → a1 (position 18) → a4 → a1 (position 19) → a2 (position 20) → a5 → a2 (position 21) → a1 (position 22) → a4 →
A1 (position 23) → a3 (position 24) → a6 → a3 (position 25) → a1 (position 26) → a4 → a1 (position 27) → (position a2
28)
It is 9 hot spots of a row in the present embodiment figure, at this point, disk crystal 16 can be passed through altogether from through-hole b1 incident pump light
It is secondary, it can pass through disc laser crystal 14 times altogether from through-hole b1 incident pump light.
Quantity of the hot spot on parabolic mirror determines by the size of spot size and parabolic mirror, further
Ground, if adjustment spot size and parabolic mirror size make a row N number of hot spot side by side, and reasonably adjust above-mentioned inclination alpha,
β, γ can make through-hole b1 incident pump light secondary by disk crystal 2* (N-1), altogether can be through from through-hole b2 incident pump light
It is secondary to cross disk crystal 2* (N-2).
Disc laser crystal a4 is excited to generate laser c2, and laser c2 can be in total reflective mirror a7 and outgoing mirror a8 and disc laser
A part of round-trip transmission between crystal a4, laser c2 can be exported from outgoing mirror a8.Realize the multiple biography of controllable pump light
It is defeated, realize high power, the output of high light beam quality laser.Since the first parabolic mirror a1 has biggish aperture first through hole
B3 can be easy to building laser and repeatedly lead to back and forth so the angle folding of laser V-type resonant cavity can change in very wide range
Cross the resonant cavity of disc laser crystal.
Embodiment 2:
As shown in Figure 5 a, it after second left side parabolic mirror a2 in embodiment 1 being cut a part, and is cutting
Right-angle reflecting prism a9 is placed at position.The structure of second parabolic mirror a2 of right-angle reflecting prism a9 combination remainder
Instead of the second parabolic mirror a2 in embodiment 1.And it is not provided with the second pump light on third parabolic mirror a3 to enter
Perforation b2.
Emergent light on right-angle reflecting prism a9 is parallel with incident light, but spatially has a displacement.Below with reference to
Attached drawing illustrates the specific location relationship of right-angle reflecting prism a9 and the second parabolic mirror a2, as shown in Figure 5 b, d in figure
The width of right-angle reflecting prism a9 is represented, H represents the width of the second parabolic mirror a2, and L represents right-angle reflecting prism right angle
Edge lengths, z represent the distance of the second cut place parabolic mirror a2 and the second center parabolic mirror a2.
The rib of right-angle reflecting prism a9 is located on the median plane of the second upper and lower surfaces parabolic mirror a2, and right angle is anti-
The upper and lower surfaces prism a9 are penetrated to be parallel to each other with the second upper and lower surfaces parabolic mirror a2；The size of right-angle reflecting prism a9
The width for needing to meet it is greater than spot diameter, i.e. d > R, its length is greater than the width of the second parabolic mirror a2,
That is L > H.
Second parabolic mirror a2 of remainder is kept not as the relative position of other component and embodiment 1
Become.
Further, if a row can N number of hot spot side by side, in the position and it that the second parabolic mirror a2 is cut away
Heart distance z meets z=N/2*R.
When laser works:
Pump light c1 is incident in parallel from through-hole b2, into multiple pump unit, is focused by the first parabolic mirror a1
Onto disc laser crystal a4, then it is reflected on the first parabolic mirror a1, is then incident on third paraboloid in parallel
It on reflecting mirror a3, then focuses on the second correction mirror a6, is then reflected on third parabolic mirror a3, to go out in parallel
It is mapped on the first parabolic mirror a1, and focuses on disc laser crystal a4, it is anti-to be then reflected into the first paraboloid
It penetrates on mirror a1, then on exiting parallel to the second parabolic mirror a2, then focuses on the first correction mirror a5, and is anti-
It is mapped on the second parabolic mirror a2, by the way that disc laser crystal a4, the first correction mirror a5, the second correction mirror is respectively set
The central axis of a6 and angle α, β, γ of x-axis direction, can allow pump light to return to position and the through-hole of the second parabolic mirror
B2 level has an offset, avoids being emitted from former through-hole b2 so as to complete primary periodically transmission.By repeatedly all in this way
After the transmission of phase property, the pump light being emitted from the first parabolic mirror a1 can reach one right-angle surface of right-angle prism, pass through right angle
The 180 degree gyroscopic characteristics of reflecting prism, pump light can be transferred to another right-angle surface of right-angle prism, then return to the first throwing
Then parabolic mirror a1 has started foregoing new cyclical transmission again.
Illustrate the entire transmission process of pump light below with reference to specific schematic diagram, Fig. 5 c is the situation in the incidence of pump light all the way
Under, in the case of through-hole b1 incident pump light, optical path mark precedence diagram is pumped on the first parabolic mirror a1.Fig. 5 d is all the way
In the case that pump light is incident, in the case of through-hole b1 incident pump light, the second parabolic mirror a2, third parabolic reflector
Optical path mark precedence diagram is pumped on mirror a3 and right-angle reflecting prism a9.
Serial number in figure passes sequentially through parabolic mirror a1, parabolic mirror a2, parabolic mirror a3 sequence
Number, and it is as follows that the position that optical transmission process is successively passed through is pumped in the case of through-hole b1 incident pump light: b1 (position 1) → a1
(position 2) → a4 → a1 (position 3) → a3 (position 4) → a6 → a3 (position 5) → a1 (position 6) → a4 → a1 (position 7) →
A2 (position 8) → a5 → a2 (position 9) → a1 (position 10) → a4 → a1 (position 11) → a3 (position 12) → (position a6 → a3
13) → a1 (position 14) → a4 → a1 (position 15) → a2 (position 16) → a5 → a2 (position 17) → a1 (position 18) → a4 →
A1 (position 19) → a3 (position 20) → a6 → a3 (position 21) → a1 (position 22) → a4 → a1 (position 23) → (position a2
24) → a5 → a2 (position 25) → a1 (position 26) → a4 → a1 (position 27) → a3 (position 28) → a6 → a3 (position 29) →
A1 (position 30) → a4 → a1 (position 31) → a2 (position 32) → a5 → a2 (position 33) → a1 (position 34) → (position a4 → a1
Set 35) → a3 (position 36) → a6 → a3 (position 37) → a1 (position 38) → a4 → a1 (position 39) → a9 (position 40) → a9
(position 41) → a1 (position 42) → a4 → a1 (position 43) → a3 (position 44) → a6 → a3 (position 45) → a1 (position 46)
→ a4 → a1 (position 47) → a2 (position 48) → a5 → a2 (position 49) → a1 (position 50) → a4 → a1 (position 51) → a3
(position 52) → a6 → a3 (position 53) → a1 (position 54) → a4 → a1 (position 55) → a2 (position 56) → (position a5 → a2
57) → a1 (position 58) → a4 → a1 (position 59) → a3 (position 60) → a6 → a3 (position 61) → a1 (position 62) → a4 →
A1 (position 63) → a2 (position 64) → a5 → a2 (position 65) → a1 (position 66) → a4 → a1 (position 67) → (position a3
68) → a6 → a3 (position 69) → a1 (position 70) → a4 → a1 (position 71) → a2 (position 72)
As shown in Figure 5 c, under conditions of a row 9 hot spots arranged side by side, then pump light can be 36 times by disc laser crystal.
Further, if a row N number of hot spot, pump light can pass through disc laser crystal 4*N times side by side.If not making
With right-angle reflecting prism, then pump light can be emitted from system in position 40, then pump light passes through the number of disc laser crystal
Greatly reduce, so right-angle reflecting prism greatly increases pumping number, laser then can be improved for laser
Light efficiency.
Further, if putting a reflecting mirror at No. 72 hot spots, so that pump light backtracking is may be implemented 8*N times and pass through
Disc laser crystal.
Disc laser crystal a4 is excited to generate laser c2, and laser c2 can be in total reflective mirror a7 and outgoing mirror a8 and disc laser
A part of round-trip transmission between crystal a4, laser c2 can be exported from outgoing mirror a8.Realize the multiple biography of controllable pump light
It is defeated, realize high power, the output of high light beam quality laser.Since the first parabolic mirror a1 has biggish aperture first through hole
B3 can be easy to building laser and repeatedly lead to back and forth so the angle folding of laser V-type resonant cavity can change in very wide range
Cross the resonant cavity of disc laser crystal.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (8)
1. one kind is based on three paraboloidal disc lasers, including it is pump light source, pumping optical collimator, disc laser crystal, more
Secondary pump unit and resonant cavity output unit, it is characterised in that:
The pump light source is incident to the multiple pump for emitting pump light, and after the pumping optical collimator executes collimation
Pu unit；
The multiple pump unit includes the first, second, third parabolic mirror and the first, second correction mirror, wherein
The disc laser crystal is arranged in the focal point of first parabolic mirror, and the back side of the disc laser crystal is coated with height
Anti- film, front are coated with high transmittance film, and the one side of pump light incidence is front, and another side is the back side, installation normal and repeatedly pump
The optical axis of Pu unit coincides or there are certain installation angle α, second, third described parabolic mirror is symmetrically disposed at institute
It states the upper surface of disc laser crystal and in the following, the height of second, third parabolic mirror is anti-no more than first paraboloid
The height of mirror is penetrated, the symmetry axis of the first, second, third parabolic mirror in the same plane, and is parallel to each other, and described second
Parabolic mirror is equipped with the first pumping incident light hole；
First parabolic mirror position symmetrical above and below is respectively arranged with second, third through-hole, and second through-hole is used
In installing first correction mirror, the focus of corresponding second parabolic mirror in position, the third through-hole is for installing institute
The second correction mirror is stated, position corresponds to the focus of third parabolic mirror；The installation normal of first, second correction mirror with
The optical axis of the multiple pump unit coincides or is respectively present certain installation folder angle beta, γ；
The centre of first parabolic mirror is provided with first through hole, for building for laser resonant cavity；The resonance
Chamber output unit collectively forms V-type laser resonator by the first through hole and the disc laser crystal, for realizing pump
The multiple oscillation of Pu light, amplification, and execute laser output.
2. according to claim 1 a kind of based on three paraboloidal disc lasers, it is characterised in that: the disc laser
It is heat sink that metallic copper is provided on crystal, for radiating to the disc laser crystal.
3. according to claim 1 a kind of based on three paraboloidal disc lasers, it is characterised in that: the third parabolic
Face reflecting mirror is equipped with the second pumping incident light hole.
4. according to claim 1 to 3 a kind of based on three paraboloidal disc lasers, it is characterised in that: when described
The installation normal of disc laser crystal and the optical axis of multiple pump unit are there are when certain installation angle α, which meets: 0
<α<π/4。
5. according to claim 1 to 3 a kind of based on three paraboloidal disc lasers, it is characterised in that: when described
There are when certain installation folder angle beta, the angle beta is full for the installation normal of first correction mirror and the optical axis of the multiple pump unit
Foot: 0 < β < π/4；When there are certain installation folders for the installation normal and the optical axis of the multiple pump unit of second correction mirror
When the γ of angle, which meets: 0 < γ < π/4.
6. according to claim 1 to 3 a kind of based on three paraboloidal disc lasers, it is characterised in that: described humorous
The chamber output unit that shakes includes laser total reflective mirror and laser output mirror, and collectively forms V-type laser with corresponding disc laser crystal
Resonant cavity.
7. a kind of three paraboloidal disc lasers are based on according to claim 1 to 3, it is characterised in that: described the
A part is cut away on the left of two parabolic mirrors, right-angle reflecting prism is placed in the part cut away, the right-angle reflecting prism
Right-angle surface is towards first parabolic mirror.
8. a kind of three paraboloidal disc lasers are based on according to claim 1 to 3, it is characterised in that: described the
One, the second correction mirror is further equipped with cooling element, which is realized using hydraulic shock cooling technology to first, second
The cooling of correction mirror.
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| EP2562892A4 (en) * | 2010-04-19 | 2017-11-22 | Huazhong University of Science and Technology | Disc-shaped solid laser |
| CN102420386B (en) * | 2011-11-04 | 2013-02-13 | 华中科技大学 | Disc solid laser based on off-axis paraboloids |
| CN103311789A (en) * | 2013-06-24 | 2013-09-18 | 清华大学 | Thin laser medium laser device |
| CN103606810B (en) * | 2013-10-22 | 2015-12-30 | 华中科技大学 | A kind of pump light many journeys transmission system and disc piece solid laser |
| DE102013114748B4 (en) * | 2013-12-21 | 2018-02-08 | Dausinger & Giesen Gmbh | Pumping Opt with increased number of passes |
| CN103840360B (en) * | 2014-03-26 | 2017-02-08 | 四川大学 | Thin lens laser |
| CN104269725B (en) * | 2014-09-12 | 2017-03-08 | 华中科技大学 | Pump light many journeys Transmission system of a kind of pair of video disc concatenation and disc piece solid laser |
| DE102016207017A1 (en) * | 2016-04-26 | 2017-10-26 | Trumpf Laser Gmbh | Pumplichtanordnung, disk laser with it and method for pumping a laser-active medium |
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