CN110289541A - Slab laser - Google Patents
Slab laser Download PDFInfo
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- CN110289541A CN110289541A CN201910398833.0A CN201910398833A CN110289541A CN 110289541 A CN110289541 A CN 110289541A CN 201910398833 A CN201910398833 A CN 201910398833A CN 110289541 A CN110289541 A CN 110289541A
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- slab laser
- laser crystal
- beam expanding
- expanding lens
- polarizing film
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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
- H01S3/094038—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
- H01S3/09—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
- H01S3/094084—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light with pump light recycling, i.e. with reinjection of the unused pump light, e.g. by reflectors or circulators
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of slab lasers, comprising: cavity mirror resonant cavity outgoing mirror, the two coaxial arrangement, and form resonant cavity；Slab laser crystal is located in resonant cavity, and is coaxially disposed with cavity mirror resonant cavity outgoing mirror；First pump arrangement, positioned at one end of slab laser crystal, for issuing pump light and being incident to slab laser crystal from one end of slab laser crystal；First reflecting mirror, in the other end of slab laser crystal, the unabsorbed laser reflection to slab laser crystal for will be come out from the other end of slab laser crystal.Using slab laser of the invention, the waste of pump light not only can be effectively reduced, avoid damage of the unabsorbed pump light to slab laser, the uniformity that pump light absorbs direction in slab laser can also be improved, the break limit of lath laser crystal and the stability of laser operation are promoted.
Description
Technical field
The present invention relates to laser technology field more particularly to a kind of slab lasers.
Background technique
High power solid-state laser technology has wide prospect to need in fields such as industry, medical treatment and basic scientific researches
It asks, is an important research direction of laser technology.In high power solid-state laser technical research, pumping is used as high power laser light
Energy source is provided, the development of pump technology causes the most attention of people.In numerous pump technologies, end pumping skill
Art becomes one of pump technology with the fastest developing speed, the advantage is that: the transmission path of the transmission path of pump light and laser
Overlapped or parallel, the two mode can match, and be conducive to the laser output of high efficiency, high light beam quality.
In the related technology, since pump light is absorbed with the rule of exponential damping by laser crystal along pumping direction,
Therefore pump light being unevenly distributed in laser crystal, the pump light intensities of laser crystal end are larger, among laser crystal
The pump light intensities of position are weaker, so as to will form biggish temperature gradient poor for the center of laser crystal and end, lead to laser
Crystalline fracture.In addition, not all pump light can all be absorbed by laser crystal, and the pumping not absorbed by laser crystal
The efficient output that light not only results in waste, is unfavorable for laser can also cause to damage to laser diode.
Summary of the invention
The embodiment of the present invention provides a kind of slab laser, at least to solve pump light waste, laser in the related technology
The problem of crystal is easily broken off.
Slab laser according to an embodiment of the present invention, comprising:
Cavity mirror resonant cavity outgoing mirror, the two coaxial arrangement, and form resonant cavity；
Slab laser crystal is located in resonant cavity, and is coaxially disposed with cavity mirror resonant cavity outgoing mirror；
First pump arrangement, positioned at one end of slab laser crystal, for issuing pump light and from slab laser crystal
One end is incident to slab laser crystal；
First reflecting mirror, positioned at the other end of slab laser crystal, for will be come out from the other end of slab laser crystal
Unabsorbed pump light reflex in slab laser crystal.
According to some embodiments of the present invention, above-mentioned slab laser further include:
Second pump arrangement, positioned at the other end of slab laser crystal, for issuing pump light and from slab laser crystal
The other end be incident to slab laser crystal；
Second reflecting mirror, positioned at one end of slab laser crystal, the second reflecting mirror is suitable for will be from the one of slab laser crystal
The unabsorbed pump light come is brought out to reflex in slab laser crystal.
In some embodiments of the invention, the second pump arrangement and the first pump arrangement are located at the two of slab laser crystal
Side.
In some embodiments of the invention, the first pump arrangement includes:
The first pumping source, the first beam expanding lens, the first focus lamp being sequentially coaxially arranged；
Second beam expanding lens, the central axis upright of the central axis of the second beam expanding lens and the first focus lamp；
The central axis of first polarizing film, the central axis of the second beam expanding lens and the first focus lamp intersects at the first polarization
Piece, and the angle of the central axis of the two and the first polarizing film is 45 °；
The pump light of first pumping source is incident to the first polarizing film after sequentially passing through the first beam expanding lens, the first focus lamp, warp
It is incident to the second beam expanding lens after crossing the reflection of the first polarizing film, and is incident to slab laser crystal after passing through the second beam expanding lens.
Further, the second pump arrangement includes:
The second pumping source, third beam expanding lens, the second focus lamp being sequentially coaxially arranged；
4th beam expanding lens, the central axis of the 4th beam expanding lens and the central axis upright of the second focus lamp；
Second polarizing film, the central axis of the 4th beam expanding lens and the central axis of the second focus lamp intersect at the second polarization
Piece, and the angle of the central axis of the two and the second polarizing film is 45 °；
Half-wave plate is equipped between 4th beam expanding lens and slab laser crystal；
The pump light of second pumping source is successively incident on the second polarizing film after third beam expanding lens, the second focus lamp,
It is incident to the 4th beam expanding lens after the reflection of the second polarizing film, and is incident to plate after sequentially passing through the 4th beam expanding lens, half-wave plate
Laser crystal；
For second polarizing film between half-wave plate and the first reflecting mirror, the first polarizing film is located at the second beam expanding lens and second instead
It penetrates between mirror；
The unabsorbed pump light come out from the other end of slab laser crystal sequentially passes through half-wave plate, the 4th expands
It is incident to the first reflecting mirror after mirror, the second polarizing film, the second polarizing film, the 4th are sequentially passed through after the reflection of the first reflecting mirror
Slab laser crystal is incident to after beam expanding lens, half-wave plate；
The unabsorbed pump light come out from one end of slab laser crystal sequentially passes through the second beam expanding lens, the first polarization
It is incident to the second reflecting mirror after piece, enters after the first polarizing film, the second beam expanding lens are sequentially passed through after the reflection of the second reflecting mirror
It is incident upon slab laser crystal.
In some embodiments of the invention, the first focus lamp includes that the first sub- focus lamp of coaxial arrangement and the second son gather
Jiao Jing.
According to some embodiments of the present invention, slab laser crystal includes the first end face and second end face being parallel to each other,
The central axis of slab laser crystal and the angle of first end face are greater than 0 ° and less than 90 °.
Further, the pump light that the first pump arrangement issues is incident from the end of the slab laser crystal, through described
First end face reflection, by the slab laser absorption of crystal.
According to some embodiments of the present invention, above-mentioned slab laser further include:
Coolant jacket, coolant jacket are set to slab laser crystal.
According to some embodiments of the present invention, above-mentioned slab laser further include:
First resonant cavity lens, the first resonant cavity lens are between cavity mirror and slab laser crystal；
Second resonant cavity lens, the second resonant cavity lens are between resonator outgoing mirror and slab laser crystal.
Using the embodiment of the present invention, by one end setting first reflection of the slab laser crystal far from the first pump arrangement
Mirror, the first reflecting mirror can reflex to the unabsorbed pump light come out from slab laser crystal in slab laser crystal,
The waste of pump light not only can be effectively reduced, avoid damage of the unabsorbed pump light to slab laser, can also mention
The uniformity that high pumping light is distributed in laser crystal.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of middle plate strip laser of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of middle plate strip laser of the embodiment of the present invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Fig. 1 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as shown in Figure 1, according to embodiments of the present invention
Slab laser 100, including cavity mirror 8, resonator outgoing mirror 13, slab laser crystal 11, the first pump arrangement
200 and first reflecting mirror 17.The coaxial arrangement of 8 resonant cavity outgoing mirror 13 of cavity mirror, and form resonant cavity.Slab laser
Crystal 11 is located in resonant cavity, and is coaxially disposed with 8 resonant cavity outgoing mirror 13 of cavity mirror.It is understood that plate
Laser crystal 11 is located between 8 resonant cavity outgoing mirror 13 of cavity mirror, the central axis of slab laser crystal 11, humorous
The central axis of the central axis resonant cavity outgoing mirror 13 of vibration resonant reflec-tors 8 is conllinear.One end of slab laser crystal 11 with
Cavity mirror 8 is opposite and spaced apart, and the other end of slab laser crystal 11 is opposite with resonator outgoing mirror 13 and is spaced apart.
First pump arrangement 200 is located at one end of slab laser crystal 11, for issue pump light and from slab laser crystalline substance
One end of body 11 is incident to slab laser crystal 11.Swash it is understood that the first pump arrangement 200 can be formed towards lath
The pump light of one end incidence of luminescent crystal 11.First reflecting mirror 17 is located at the other end of slab laser crystal 11, and being used for will be from plate
The unabsorbed pump light that the other end of laser crystal 11 comes out reflexes in slab laser crystal 11.
It is to be understood that a part can after the pump light that the first pump arrangement 200 issues enters slab laser crystal 11
To be absorbed by slab laser crystal 11, some is not absorbed by slab laser crystal 11, is not inhaled by slab laser crystal 11
The pump light of receipts can be incident to the first reflecting mirror 17 after coming out from the other end of slab laser crystal 11, and the first reflecting mirror 17 can
The part pump light is reflexed to slab laser crystal 11, to be absorbed again by slab laser crystal 11.
Using the above embodiment of the present invention, by the one end of slab laser crystal 11 far from the first pump arrangement 200
First reflecting mirror 17 is set, and the first reflecting mirror 17 can reflect the unabsorbed pump light come out from slab laser crystal 11
To slab laser crystal 11, the waste of pump light not only can be effectively reduced, avoid pump light to the damage of slab laser 100
It is bad, the uniformity that pump light is distributed in slab laser crystal 11 can also be improved.
On the basis of the above embodiments, it is further proposed that each variant embodiment, it should be noted that in order to make to retouch
It states briefly, the difference with above-described embodiment is only described in each variant embodiment.
Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as shown in Fig. 2, more according to the present invention
Embodiment, above-mentioned slab laser 100 can also include the second pump arrangement 300 and the second reflecting mirror 7, the second pump arrangement
300 are located at the other end of slab laser crystal 11, for issuing pump light and being incident to from the other end of slab laser crystal 11
Slab laser crystal 11.Second reflecting mirror 7 is located at one end of slab laser crystal 11, and the second reflecting mirror 7 is suitable for swash from lath
The unabsorbed pump light that one end of luminescent crystal 11 comes out reflexes in slab laser crystal 11.Thus, it is possible to improve lath
The delivery efficiency of laser 100, while 100 inside-pumping light distribution uniformity of slab laser is improved, to reduce slab laser
The temperature difference in 100 between each region reduces the loss of slab laser 100, postpones the service life of slab laser 100.
Fig. 1 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as shown in Fig. 2, in some realities of the invention
It applies in example, the second pump arrangement 300 and the first pump arrangement 200 can be positioned at the two sides of slab laser crystal 11.For example, first
Pump arrangement 200 can be located at the top of slab laser crystal 11, and the second pump arrangement 300 can be located at slab laser crystal 11
Lower section.
Fig. 1 and Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as shown in Figures 1 and 2, at this
In some embodiments of invention, it is poly- that the first pump arrangement 200 can specifically include the first pumping source 1, the first beam expanding lens 2, first
Burnt mirror 210, the second beam expanding lens 6 and the first polarizing film 5.First pumping source 1, the first beam expanding lens 2, the first focus lamp 210 are successively same
Axis setting, in other words, the first beam expanding lens 2 is between the first pumping source 1 and the first focus lamp 210, the center of the first beam expanding lens 2
Axis, the central axis of the first pumping source 1, the central axis of the first focus lamp 210 are conllinear.Second beam expanding lens 6 is close to first
Focus lamp 210 is arranged, and the central axis upright of the central axis of the second beam expanding lens 6 and the first focus lamp 210.Second beam expanding lens
The central axis of 6 central axis and the first focus lamp 210 intersects at the first polarizing film 5, the central axis of the second beam expanding lens 6 with
The angle of the central axis of first polarizing film 5 is 45 °, the central axis of the central axis of the first focus lamp 210 and the first polarizing film 5
The angle of line is 45 °.
The pump light that first pumping source 1 is formed is incident to first after sequentially passing through the first beam expanding lens 2, the first focus lamp 210
Polarizing film 5 reflexes to the second beam expanding lens 6 by the first polarizing film 5, and is incident to slab laser crystalline substance after passing through the second beam expanding lens 6
Body 11.
Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as shown in Fig. 2, of the invention some
In embodiment, the second pump arrangement 300 can specifically include the second pumping source 21, third beam expanding lens 20, the second focus lamp 220,
4th beam expanding lens 15 and the second polarizing film 16.Second pumping source 21, third beam expanding lens 20, the second focus lamp 220 are sequentially coaxially set
It sets, in other words, third beam expanding lens 20 is between the second pumping source 21 and the second focus lamp 220, the center of the second pumping source 21
Axis, the central axis of third beam expanding lens 20, the central axis of the second focus lamp 220 are conllinear.The central axis of 4th beam expanding lens 15
The central axis upright of line and the second focus lamp 220, the central axis of the central axis of the 4th beam expanding lens 15 and the second focus lamp 220
Line intersects at the second polarizing film 16, and the central axis of the 4th beam expanding lens 15 and the angle of the central axis of the second polarizing film 16 are
45 °, the angle of the central axis of the central axis of the second focus lamp 220 and the second polarizing film 16 is 45 °.
Half-wave plate 14 is equipped between 4th beam expanding lens 15 and slab laser crystal 11.Half-wave plate 14 can be used for changing pumping
The polarization state of light.The pump light of second pumping source 21 is successively incident to second after third beam expanding lens 20, the second focus lamp 220
On polarizing film 16, the 4th beam expanding lens 15 is reflexed to by the second polarizing film 16, and sequentially pass through the 4th beam expanding lens 15, half-wave plate 14
After be incident to slab laser crystal 11.
Second polarizing film 16 is located between half-wave plate 14 and the first reflecting mirror 17, and the first polarizing film 5 is located at the second beam expanding lens 6
Between the second reflecting mirror 7.For example, the first reflecting mirror 17, half-wave plate 14, the 4th beam expanding lens 15 are coaxially disposed, the first reflecting mirror
17 and the 4th beam expanding lens 15 be located at the two sides of the second polarizing film 16, the second beam expanding lens 6 and the coaxial arrangement of the second reflecting mirror 7,
Second reflecting mirror 7 and the second beam expanding lens 6 are located at the two sides of the first polarizing film 5.
The unabsorbed pump light come out from the other end of slab laser crystal 11 sequentially passes through half-wave plate the 14, the 4th and expands
It is incident to the first reflecting mirror 17 after beam mirror 15, the second polarizing film 16, second is sequentially passed through after the reflection of the first reflecting mirror 17 partially
Slab laser crystal 11 is incident to after vibration piece 16, the 4th beam expanding lens 15, half-wave plate 14.
The unabsorbed pump light come out from one end of slab laser crystal 11 sequentially passes through the second beam expanding lens 6, first
It is incident to the second reflecting mirror 7 after polarizing film 5, the expansion of the first polarizing film 5, second is sequentially passed through after the reflection of the second reflecting mirror 7
Slab laser crystal 11 is incident to after beam mirror 6.
So arrangement can optimize the arrangement of all parts in slab laser 100, reduce the body of slab laser 100
Product.
Fig. 1 and Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as depicted in figs. 1 and 2, at this
In some embodiments of invention, the first focus lamp 210 may include the first sub- focus lamp 3 and the second sub- focus lamp of coaxial arrangement
4。
Fig. 1 and Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as depicted in figs. 1 and 2, according to
Some embodiments of the present invention, slab laser crystal 11 include the first end face and second end face being parallel to each other, and slab laser is brilliant
The central axis of body 11 and the angle of first end face are greater than 0 ° and less than 90 °.For example, the central axis of slab laser crystal 11 with
The angle of first end face can be 30 °, 15 °, 45 ° or 20 ° etc., can be configured according to actual needs, as long as swashing in lath
The both ends of luminescent crystal 11 form corner cut.
Further, as depicted in figs. 1 and 2, the pump light that the first pump arrangement 200 issues is from slab laser crystal 11 1
The end at end is incident, reflects through first end face, is absorbed by slab laser crystal 11.The pump light that second pump arrangement 300 issues
It is incident from the end of 11 other end of slab laser crystal, it reflects through second end face, is absorbed by slab laser crystal 11.For example, the
The pump light that one pump arrangement 200 is formed can vertically be injected from the periphery wall of 11 one end of slab laser crystal, through first end face
Reflection, is absorbed by slab laser crystal 11.The pump light that second pump arrangement 300 is formed is from 11 other end of slab laser crystal
Periphery wall is vertically injected, and is reflected through second end face, is absorbed by slab laser crystal 11.
Fig. 1 and Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as depicted in figs. 1 and 2, according to
Some embodiments of the present invention, above-mentioned slab laser 100 can also include coolant jacket 10, and it is brilliant that coolant jacket 10 is set to slab laser
Body 11.Coolant jacket 10 can be used for cooling lath laser crystal 11 as a result, during the work time to avoid slab laser crystal 11
The case where constant temperature raising causes fracture.For superpower laser, it can generate at work a large amount of useless
Heat, coolant jacket 10 can cool down slab laser crystal 11, reduce fuel factor.For example, coolant jacket 10 can be externally fitted to plate
Laser crystal 11.
Fig. 1 and Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as depicted in figs. 1 and 2, according to
Some embodiments of the present invention, above-mentioned slab laser 100 can also include the first resonant cavity lens 9 and the second resonant cavity lens
12, the first resonant cavity lens 9 are between cavity mirror 8 and slab laser crystal 11, the second resonant cavity lens 12, and second
Resonant cavity lens 12 are between resonator outgoing mirror 13 and slab laser crystal 11.Due to the laser work of slab laser crystal 11
Fuel factor during work will lead to laser and vibrate generation distortion in resonant cavity, and the first resonant cavity lens 9, the second resonant cavity are saturating
Mirror 12 may be constructed one group of Image relaying system, to reduce distortion of the laser in resonant cavity.
Further, as depicted in figs. 1 and 2, the first resonant cavity lens 9, slab laser crystal 11, the second resonant cavity lens
12, cavity mirror 8, resonator outgoing mirror 13 are coaxially disposed.
Slab laser 100 can be slab laser, the laser diode of semiconductor laser array both-end round trip pumping
Both-end round trip pumping Yb:YAG slab laser.
It should be noted that in the description of this specification, reference term " one embodiment ", " is shown " some embodiments "
The description of meaning property embodiment ", " example ", " specific example " or " some examples " etc. means that the embodiment or example is combined to describe
Particular features, structures, materials, or characteristics be included at least one embodiment or example of the invention.In this specification
In, schematic expression of the above terms may not refer to the same embodiment or example.Moreover, the specific features of description,
Structure, material or feature can be combined in any suitable manner in any one or more of the embodiments or examples.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Slab laser 100 according to an embodiment of the present invention is described in detail with a specific embodiment referring to Fig. 2.
It is worth understanding, it is described below to be merely illustrative, rather than to concrete restriction of the invention.It is all using of the invention
Similar structure and its similar variation, should all be included in protection scope of the present invention.
Fig. 2 is the structural schematic diagram of the slab laser of the embodiment of the present invention, as shown in Fig. 2, institute of the embodiment of the present invention
A kind of slab laser 100 provided includes cavity mirror 8, resonator outgoing mirror 13, the pump of slab laser crystal 11, first
Pump apparatus 200, the first reflecting mirror 17, the second pump arrangement 300, the second reflecting mirror 7, half-wave plate 14, coolant jacket 10, the first resonance
Chamber lens 9, the second resonant cavity lens 12.
Cavity mirror 8, the first resonant cavity lens 9, slab laser crystal 11, the second resonant cavity lens 12, resonant cavity
Outgoing mirror 13 is sequentially coaxially arranged.Cavity mirror 8, resonator outgoing mirror 13 constitute resonant cavity.11 shape of slab laser crystal
At laser can export with laser required for reaching and from resonator outgoing mirror 13 in resonant cavity interior resonance.In addition, due to
Fuel factor during laser work will lead to laser and vibrate generation distortion in resonant cavity, so the first resonant cavity lens 9, the
Two resonant cavity lens 12 constitute one group of Image relaying system and reduce distortion of the laser in resonant cavity with this.
First pump arrangement 200 and the second pump arrangement 300 are located at the two sides of slab laser crystal 11, and the first pump
Pump apparatus 200 is arranged close to one end of slab laser crystal 11, and the second pump arrangement 300 is close to the another of slab laser crystal 11
End setting, the first reflecting mirror 17 are arranged close to the second pump arrangement 300, and the second reflecting mirror 7 is set close to the first pump arrangement 200
It sets.The end face at 11 both ends of slab laser crystal is parallel and 45 ° are obliquely installed.Coolant jacket 10 is coated at slab laser crystal 11 and plate
The both ends leakage of laser crystal 11.
Specifically, the first pump arrangement 200 includes the first pumping source 1, the first beam expanding lens 2, the first focus lamp 210, the
Two beam expanding lens 6 and the first polarizing film 5.First focus lamp 210 includes the first sub- focus lamp 3 and the second sub- focus lamp of coaxial arrangement
4.First pumping source 1, the first beam expanding lens 2, the first sub- focus lamp 3 and the second sub- focus lamp 4 are sequentially coaxially arranged, the second beam expanding lens
6 are arranged close to the second sub- focus lamp 4, and the central axis upright of the central axis of the second beam expanding lens 6 and the second sub- focus lamp 4.
The central axis of the central axis of second beam expanding lens 6 and the second sub- focus lamp 4 intersects at the first polarizing film 5, the second beam expanding lens 6
The angle of the central axis of central axis and the first polarizing film 5 is 45 °, the central axis of the second sub- focus lamp 4 and the first polarization
The angle of the central axis of piece 5 is 45 °.
Second pump arrangement 300 can specifically include the second pumping source 21, third beam expanding lens 20, the second focus lamp 220,
Four beam expanding lens 15 and the second polarizing film 16.Second focus lamp 220 includes that the sub- focus lamp 19 of third of coaxial arrangement and the 4th son gather
Burnt mirror 18.The sub- focus lamp 19 of second pumping source 21, third beam expanding lens 20, third and the 4th sub- focus lamp 18 are sequentially coaxially arranged,
The central axis upright of the central axis of 4th beam expanding lens 15 and the 4th sub- focus lamp 18, the central axis of the 4th beam expanding lens 15 with
The central axis of 4th sub- focus lamp 18 intersects at the second polarizing film 16, the central axis and the second polarizing film of the 4th beam expanding lens 15
The angle of 16 central axis is 45 °, the folder of the central axis of the central axis and the second polarizing film 16 of the 4th sub- focus lamp 18
Angle is 45 °.Half-wave plate 14 is equipped between 4th beam expanding lens 15 and slab laser crystal 11.Half-wave plate 14 can be used for changing laser
Polarization state.Half-wave plate 14 and the 4th beam expanding lens 15 are coaxially disposed.
First reflecting mirror 17, the 4th beam expanding lens 15, half-wave plate 14 are sequentially coaxially arranged, and the first reflecting mirror 17 and the 4th expands
Mirror 15 is located at the two sides of the second polarizing film 16.Second beam expanding lens 6 and the coaxial arrangement of the second reflecting mirror 7,7 He of the second reflecting mirror
Second beam expanding lens 6 is located at the two sides of the first polarizing film 5.
First pumping source 1 is the semiconductor laser (pumping of the first pumping source 1 sending direction TE polarization of the direction TE polarization
Light), the first beam expanding lens 2 and the second beam expanding lens 6 are the direction x cylindrical lens.First sub- focus lamp 3 and the second sub- focus lamp 4 are y
Direction cylindrical lens.The pump light that first pumping source 1 is formed passes through the first beam expanding lens 2, the first sub- focus lamp 3, the second sub- focus lamp
4, the hot spot that the end of one and 11 one end of slab laser crystal matches is shaped to after the processing of the second beam expanding lens 6.First polarization
Piece 5 is to the pumping light total reflection of TE polarization mode, to the pump light total transmissivity of TM polarization mode.After the second sub- focus lamp 4
Pump light be totally reflected after the first polarizing film 5,90 ° of light path folding, slab laser crystal is incident to TE polarization mode
11 one end.The pump light for the TE polarization mode not absorbed by slab laser crystal 11 by 11 other end of slab laser crystal end
Face reflexes to half-wave plate 14, and after half-wave plate 14, the pump light of part TE polarization mode is converted into TM polarization mode
Pump light is simultaneously incident to the second polarizing film 16 across the 4th beam expanding lens 15.Pumping due to the second polarizing film 16 to TM polarization mode
Light is total transmissivity, so the pump light for being converted to TM polarization mode is incident to the first reflecting mirror 17 after passing through the second polarizing film 16,
And by being incident to half-wave plate 14 after again passing through the second polarizing film 16, the 4th beam expanding lens 15 after the reflection of the first reflecting mirror 17, pass through
It crosses half-wave plate 14 and is converted into the pump light of TE polarization mode and be again introduced into slab laser crystal 11.
Second pumping source 21 is the semiconductor laser (pump of the second pumping source 21 sending direction TE polarization of the direction TE polarization
Pu light), third beam expanding lens 20 and the 4th beam expanding lens 15 are the direction x cylindrical lens.The sub- focus lamp 19 of third and the 4th sub- focus lamp
18 be the direction y cylindrical lens.The pump light that second pumping source 21 is formed is by third beam expanding lens 20, the sub- focus lamp 19 of third, the
It is shaped to what the end of one and 11 other end of slab laser crystal matched after four sub- focus lamps 18, the processing of the 4th beam expanding lens 15
Hot spot.Second polarizing film 16 is to the pumping light total reflection of TE polarization mode, to the pump light total transmissivity of TM polarization mode.Across
Pump light after four sub- focus lamps 18 is totally reflected after the second polarizing film 16, and 90 ° of light path folding is simultaneously entered with TE polarization mode
It is incident upon half-wave plate 14, the pump light of TM polarization mode is converted into after half-wave plate 14 and is incident to the another of slab laser crystal 11
One end.The pump light for the TM polarization mode not absorbed by slab laser crystal 11 by 11 one end of slab laser crystal end face reflection
To the second beam expanding lens 6, and it is incident to the second polarizing film 16, due to the laser that unabsorbed pump light is TM polarization mode, the
One polarizing film 5 is total transmissivity to the pump light of TM polarization mode, and the pump light of TM polarization mode passes through incidence after the first polarizing film 5
It is incident to the second reflecting mirror 7, and after again passing through the first polarizing film 5, the second beam expanding lens 6 after reflecting by the second reflecting mirror 7
One end of slab laser crystal 11.
The slab laser 100 of the embodiment of the present invention, by using both-end round trip pump mode, so that pump light is in lath
Distribution becomes uniformly in laser crystal 11, and the temperature difference in slab laser crystal 11 is reduced, and slab laser crystal 11 is improved
Break limit, and secondary use pumping is carried out to the pump light that is not absorbed by slab laser crystal 11, improves slab laser
The delivery efficiency of device 100, and solve unabsorbed pump light in one way double-ended structure in the related technology and laser diode is made
The problem of at damage, improve the reliability of slab laser 100.
It should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is right
For those skilled in the art, the invention may be variously modified and varied.All within the spirits and principles of the present invention,
Any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of slab laser characterized by comprising
Cavity mirror resonant cavity outgoing mirror, the two coaxial arrangement, and form resonant cavity；
Slab laser crystal is located in the resonant cavity, and is coaxially disposed with the cavity mirror resonant cavity outgoing mirror；
First pump arrangement, positioned at one end of the slab laser crystal, for issue pump light and from the slab laser it is brilliant
One end of body is incident to the slab laser crystal；
First reflecting mirror, positioned at the other end of the slab laser crystal, for will be from the other end of the slab laser crystal
Unabsorbed pump light out reflexes in the slab laser crystal.
2. slab laser as described in claim 1, which is characterized in that further include:
Second pump arrangement, positioned at the other end of the slab laser crystal, for issuing pump light and from the slab laser
The other end of crystal is incident to the slab laser crystal；
Second reflecting mirror, positioned at one end of the slab laser crystal, second reflecting mirror is suitable for will be from the slab laser
The unabsorbed pump light that one end of crystal comes out reflexes in the slab laser crystal.
3. slab laser as claimed in claim 2, which is characterized in that second pump arrangement and first pumping fill
Setting in the two sides of the slab laser crystal.
4. slab laser as claimed in claim 2, which is characterized in that first pump arrangement includes:
The first pumping source, the first beam expanding lens, the first focus lamp being sequentially coaxially arranged；
Second beam expanding lens, the central axis upright of the central axis of second beam expanding lens and first focus lamp；
First polarizing film, the central axis of the central axis of second beam expanding lens and first focus lamp intersect at described the
One polarizing film, and the angle of the central axis of the two and first polarizing film is 45 °；
The pump light of first pumping source is incident to described after sequentially passing through first beam expanding lens, first focus lamp
One polarizing film is incident to second beam expanding lens after the reflection of first polarizing film, and passes through second beam expanding lens
After be incident to the slab laser crystal.
5. slab laser as claimed in claim 4, which is characterized in that second pump arrangement includes:
The second pumping source, third beam expanding lens, the second focus lamp being sequentially coaxially arranged；
4th beam expanding lens, the central axis of the 4th beam expanding lens and the central axis upright of second focus lamp；
Second polarizing film, the central axis of the 4th beam expanding lens and the central axis of second focus lamp intersect at described the
Two polarizing films, and the angle of the central axis of the two and second polarizing film is 45 °；
Half-wave plate is equipped between 4th beam expanding lens and the slab laser crystal；
The pump light of second pumping source is successively incident to described after the third beam expanding lens, second focus lamp
On two polarizing films, the 4th beam expanding lens is incident to after the reflection of second polarizing film, and sequentially pass through the described 4th
The slab laser crystal is incident to after beam expanding lens, the half-wave plate；
For second polarizing film between the half-wave plate and first reflecting mirror, first polarizing film is located at described the
Between two beam expanding lens and second reflecting mirror；
The unabsorbed pump light come out from the other end of the slab laser crystal sequentially passes through the half-wave plate, described the
It is incident to first reflecting mirror after four beam expanding lens, second polarizing film, after the reflection of first reflecting mirror successively
The slab laser crystal is incident to after second polarizing film, the 4th beam expanding lens, the half-wave plate；
The unabsorbed pump light come out from one end of the slab laser crystal sequentially passes through second beam expanding lens, described
It is incident to second reflecting mirror after first polarizing film, described first is sequentially passed through after the reflection of second reflecting mirror partially
The slab laser crystal is incident to after vibration piece, second beam expanding lens.
6. slab laser as claimed in claim 4, which is characterized in that first focus lamp includes the first of coaxial arrangement
Sub- focus lamp and the second sub- focus lamp.
7. slab laser as described in claim 1, which is characterized in that the slab laser crystal includes to be parallel to each other
One end face and second end face, the central axis of the slab laser crystal are greater than 0 ° with the angle of the first end face and are less than
90°。
8. slab laser as claimed in claim 7, which is characterized in that the pump light that first pump arrangement issues is from institute
The end for stating slab laser crystal is incident, reflects through the first end face, by the slab laser absorption of crystal.
9. slab laser as described in claim 1, which is characterized in that further include:
Coolant jacket, the coolant jacket are set to the slab laser crystal.
10. slab laser as described in claim 1, which is characterized in that further include:
First resonant cavity lens, between the cavity mirror and the slab laser crystal；
Second resonant cavity lens, between the resonator outgoing mirror and the slab laser crystal.
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|---|---|---|---|
| CN201910398833.0A CN110289541A (en) | 2019-05-14 | 2019-05-14 | Slab laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398833.0A CN110289541A (en) | 2019-05-14 | 2019-05-14 | Slab laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110932077A (en) * | 2019-12-23 | 2020-03-27 | 南京先进激光技术研究院 | End-pump multi-pass slab laser amplifier |
| CN115064929A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber pump light coupling system and method thereof |
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| CN110932077A (en) * | 2019-12-23 | 2020-03-27 | 南京先进激光技术研究院 | End-pump multi-pass slab laser amplifier |
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| CN115064929A (en) * | 2022-08-05 | 2022-09-16 | 武汉创鑫激光科技有限公司 | Crystal fiber pump light coupling system and method thereof |
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