CN115102015A - End-pumped polycrystal tandem structure - Google Patents
End-pumped polycrystal tandem structure Download PDFInfo
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- CN115102015A CN115102015A CN202211017434.3A CN202211017434A CN115102015A CN 115102015 A CN115102015 A CN 115102015A CN 202211017434 A CN202211017434 A CN 202211017434A CN 115102015 A CN115102015 A CN 115102015A
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- 229910052802 copper Inorganic materials 0.000 claims description 4
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- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910009372 YVO4 Inorganic materials 0.000 description 1
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- QWVYNEUUYROOSZ-UHFFFAOYSA-N trioxido(oxo)vanadium;yttrium(3+) Chemical compound [Y+3].[O-][V]([O-])([O-])=O QWVYNEUUYROOSZ-UHFFFAOYSA-N 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/0602—Crystal lasers or glass lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/07—Construction or shape of active medium consisting of a plurality of parts, e.g. segments
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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
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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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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention relates to the technical field of laser and discloses an end-pumped polycrystal series connection structure. The end-pumped polycrystal tandem structure comprises a plurality of laser gain components, each laser gain component comprises a pumping source, a focusing mirror, dichroic mirrors, a negative lens and a laser crystal, the dichroic mirrors are provided with a transmission surface and a reflection surface which are oppositely arranged, the pumping source, the focusing mirror, the dichroic mirrors and the negative lens of the same laser gain component are sequentially arranged on the light incident side of the laser crystal along the same optical axis, each dichroic mirror is arranged in parallel, the laser crystal is obliquely arranged relative to the dichroic mirrors, and the laser emitted by one laser crystal irradiates the reflection surface of the next dichroic mirror; the negative lens is used for compensating the thermal lens of the laser crystal, so that the influence of a thermal effect is reduced, the conversion efficiency of the pump light and the laser is improved, and the output power of the laser is improved.
Description
Technical Field
The invention relates to the technical field of laser, in particular to an end-pumped polycrystal series connection structure.
Background
With the increasing application of laser technology in industry, the search for new lasers is becoming a trend in the laser industry.
The new laser mainly includes three aspects, one is that the range of laser spectrum is widened, and lasers with various wavelengths appear in succession. The other is the improvement of laser power. Higher laser power means an increase in the processing limit of the material, which is, in turn, a reduction in pulse width. The successive industrial maturity of picoseconds and femtoseconds is the revolutionary upgrade of industrial applications.
In order to make the high-power solid laser have wider application, the output power of the solid laser must be improved on the premise of ensuring the quality of light beams, and the design method of the multi-gain medium resonant cavity is an important method for improving the output power of the solid laser.
However, in end-pumped systems, the pump beam is usually focused and the rayleigh length is short, thus limiting the power development of the laser in a multi-rod tandem configuration.
At present, the laser in multi-rod series connection is mostly in a lamp pump structure, however, in a side pumping system, although the output power of laser is improved by a traditional side pump laser, the laser output mode is poor because the overlapping of pump light and oscillation light is low.
Disclosure of Invention
The invention mainly aims to provide an end-pumped polycrystal series connection structure, and aims to solve the technical problem that the laser output power of the conventional end-pumped laser is low.
In order to achieve the above object, the present invention provides an end-pumped polycrystal series connection structure, including:
the laser gain assembly comprises a pumping source, a focusing mirror, a dichroic mirror and a laser crystal, wherein the dichroic mirror is provided with a transmission surface and a reflection surface which are arranged oppositely, the pumping source, the focusing mirror and the dichroic mirror of the laser gain assembly are sequentially arranged on the light inlet side of the laser crystal along the same optical axis, the dichroic mirror is arranged in parallel, the laser crystal is obliquely arranged relative to the dichroic mirror, and the laser emitted by the laser crystal irradiates on the reflection surface of the next dichroic mirror.
Optionally, in an embodiment, the laser gain module further includes a plurality of negative lenses, and the negative lenses are disposed between the dichroic mirror and the laser crystal.
Optionally, in an embodiment, the laser crystal is tilted with respect to the dichroic mirror by an angle of 30 ° to 60 °.
Optionally, in an embodiment, the end-pumped polycrystalline tandem structure further includes a polarizer, the polarizer is disposed on the light exit side of the last laser crystal, and the polarizer is disposed in an inclined manner with respect to the light emitted from the light exit side.
Optionally, in an embodiment, the polarizer is inclined at an angle of 34 ° with respect to the light emitted from the light-emitting side.
Optionally, in an embodiment, the end-pumped polycrystalline tandem structure further includes a high-reflection mirror, the high-reflection mirror is disposed between the last laser crystal and the polarizer, the high-reflection mirror is disposed in parallel with the dichroic mirror, and the laser emitted from the last laser crystal irradiates a reflection surface of the high-reflection mirror.
Optionally, in an embodiment, the end-pumped multi-crystal series connection structure further includes a crystal seat and a plurality of crystal covers, a plurality of fixing seats are correspondingly disposed on one surface of the crystal seat, any two adjacent fixing seats are arranged in a mirror image manner, the laser crystal is disposed on the fixing seats, the crystal covers are covered on the fixing seats, and the focusing mirror and the dichroic mirror are disposed on the surface of the crystal seat and located on the same surface as the fixing seats.
Optionally, in an embodiment, the fixing base is provided with a first groove, the crystal cover is provided with a second groove adapted to the first groove, the crystal cover covers the fixing base, the first groove and the second groove form a through groove, and the laser crystal is disposed in the through groove.
Optionally, in an embodiment, the transmission surface is adjacent to the focusing mirror and is plated with an antireflection film, and the reflection surface is away from the focusing mirror and is plated with a high-reflection film.
Optionally, in an embodiment, the crystal cover and the crystal base are made of gold-plated red copper.
In the technical scheme provided by the invention, a pumping source, a focusing mirror and a dichroic mirror of the same laser gain component are sequentially arranged on the light inlet side of a laser crystal along the same optical axis, so that pumping light emitted by the pumping source is irradiated on the focusing mirror, the focusing mirror focuses the pumping light and focuses the pumping light into a light spot after passing through the dichroic mirror, the laser crystal absorbs the incident pumping light to generate population inversion, the radiation generates laser, the conversion efficiency of the pumping light and the laser is improved, the laser emitted by one laser crystal is irradiated on the reflecting surface of the next dichroic mirror, so that the transmission path of the laser emitted by the laser crystal is bent and is emitted into the next laser crystal, new stimulated radiation is continuously induced in the laser crystal, the laser is amplified, and the output power of the laser is improved.
Drawings
One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.
FIG. 1 is a schematic top view of an end-pumped poly tandem configuration of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic illustration of an explosive structure according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of the present invention.
Wherein, 10, end pumping polycrystal tandem connection structure; 11. a laser gain component; 12. a pump source; 13. a focusing mirror; 14. a dichroic mirror; 15. a laser crystal; 16. a polarizer; 17. a negative lens; 18. a high reflection mirror; 19. a crystal mount; 20. a fixed seat; 201. a first groove; 21. a crystal cover; 202. a second groove.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only. In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and any variations thereof, are intended to cover a non-exclusive inclusion, which may have the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or combinations thereof.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
In the embodiment of the present invention, the number of the laser gain modules 11 is three, and the three laser gain modules 11 are divided into a first laser gain module 11, a second laser gain module 11, and a third laser gain module 11, where in the description of the present invention, the terms "first", "second", and "third" are only used to distinguish the number of the laser gain modules 11, and certainly, it does not mean that the number is limited to only three, and the number of the laser gain modules 11 may be n, where n is greater than or equal to 2.
As shown in fig. 1 to 4, an embodiment of the present invention discloses an end-pumped poly-crystal tandem structure 10, which includes a plurality of laser gain modules 11, each of the laser gain modules 11 includes a pump source 12, a focusing mirror 13, a dichroic mirror 14, and a laser crystal 15, the pump source 12 is used for generating pump light, it should be understood that the pump source 12 may be a pump lamp or a semiconductor laser, wherein the plurality of laser gain modules 11 may be a first laser gain module 11, a second laser gain module 11, and a third laser gain module 11, respectively, the first laser gain module 11 includes a first pump source 12, a first focusing mirror 13, a first dichroic mirror 14, and a first laser crystal 15, the second laser gain module 11 includes a second pump source 12, a second focusing mirror 13, a second dichroic mirror 14, and a second laser crystal 15, the third laser gain component 11 includes a third pumping source 12, a third focusing mirror 13, a third dichroic mirror 14 and a third laser crystal 15, the first laser gain component 11 sequentially arranges the first pumping source 12, the first focusing mirror 13 and the first dichroic mirror 14 on the light incident side of the first laser crystal 15 along the same laser transmission optical axis, and makes the transmission surface of the first dichroic mirror 14 adjacent to the first focusing mirror 13, and the reflection surface of the first dichroic mirror 14 deviates from the first focusing mirror 13, so that the pumping light emitted from the first pumping source 12 is irradiated on the first focusing mirror 13, the first focusing mirror 13 focuses the pumping light, and focuses the pumping light into a light spot after penetrating through the first dichroic mirror 14, and the first laser crystal 15 absorbs the incident pumping light to generate the population inversion to radiate and generate laser light, the conversion efficiency of pumping light and laser is improved, a second laser gain assembly 11 is arranged on the light-emitting side of a laser crystal 15 of a first laser gain assembly 11, wherein a second pumping source 12, a second focusing mirror 13, a second dichroic mirror 14 and the second laser crystal 15 in the second laser gain assembly 11, and a third pumping source 12, a third focusing mirror 13, a third dichroic mirror 14 and a third laser crystal 15 in the third laser gain assembly 11 are arranged in the same way as the first pumping source 12, the first focusing mirror 13, the first dichroic mirror 14 and the first laser crystal 15 in the first laser gain assembly 11, and the second dichroic mirror 14 is arranged on the light-emitting side of the first laser crystal 15, and the second dichroic mirror 14 and the first laser crystal 15 are positioned on the same optical axis of laser irradiation, the working positions of the first laser crystal 15 and the second laser are arranged in a mirror image manner, so that the laser emitted by the first laser crystal 15 irradiates the reflecting surface of the second dichroic mirror 14, the laser is reflected by the reflecting surface to enable the transmission path of the laser to be turned and enter the second laser crystal 15, the laser enters the second laser crystal 15 and then continuously induces new stimulated radiation, the laser is amplified, meanwhile, the pump light emitted by the second pump source 12 enters the second laser crystal 15 through the second focusing mirror 13 and the second dichroic mirror 14, the second laser crystal 15 absorbs the incident pump light to generate population inversion, the laser generated by radiation is fused with the amplified laser to further amplify the laser, strong laser is generated, and the output power of the laser is improved; the laser irradiates on the third dichroic mirror 14 to make the transmission path of the laser bend to enter the third laser crystal 15, the laser enters the third laser crystal 15 and then continuously induces new stimulated radiation, the laser is amplified again, meanwhile, the pumping light emitted by the third pumping source 12 enters the third laser crystal 15 through the third focusing mirror 13 and the third dichroic mirror 14, the third laser crystal 15 absorbs the incident pumping light to generate particle number reversal, the laser generated by radiation is converged, the laser generated by the radiation is fused with the laser amplified again, the laser is further amplified, thereby generating stronger laser, and the output power of the laser is further improved.
Because the polarization of the laser is related to the lattice structure of the laser crystal 15, when the laser output by the laser crystal 15 is unpolarized, the end-pumped polycrystalline tandem structure 10 further includes a polarizer 16, the polarizer 16 is disposed on the light-emitting side of the last laser crystal 15, and the polarizer 16 is disposed in an inclined manner with respect to the light emitted from the light-emitting side. Specifically, the polarizer 16 is disposed on the light-emitting side of the last laser crystal 15 (corresponding to the third laser crystal 15 of the third laser gain module 11), and the laser light emitted from the laser crystal 15 is obliquely incident on the polarizer 16, and the polarizer 16 can convert the laser light into polarized light. Illustratively, the laser crystal 15 is a Nd: YAG crystal, and laser light output from the Nd: YAG crystal is unpolarized light.
When the laser light output from the laser crystal 15 is polarized light, the polarizer 16 is not required in the end-pumped multi-crystal serial connection structure 10. Illustratively, the laser crystal 15 is Nd: YVO4 (neodymium-doped yttrium vanadate crystal) or Nd: GdVO4 (neodymium-doped gadolinium vanadate crystal).
It can be understood that, by the above-mentioned scheme, the number of the laser gain modules 11 can be increased in the end-pumped polycrystalline series connection structure 10 with the same volume, so that the laser emitted from the previous laser gain module 11 is incident on the next laser gain module 11 for continuous oscillation amplification, and further, the output power of the laser is improved.
In the present embodiment, the laser gain assembly 11 further includes a plurality of negative lenses 17, and the negative lenses 17 are disposed between the dichroic mirror 14 and the laser crystal 15. Specifically, each negative lens 17 is disposed between the first dichroic mirror 14 and the first laser crystal 15, between the second dichroic mirror 14 and the second laser crystal 15, and between the third dichroic mirror 14 and the third laser crystal 15, respectively. It can be understood that, according to the above scheme, by measuring the thermal lens focal length of the laser crystal 15 first, and according to the design index of the actual end-pumped polycrystal series connection structure 10, the equation of the optical ABCD matrix in the end-pumped polycrystal series connection structure 10 is solved, wherein the optical ABCD matrix is the ABCD matrix of the optical resonant cavity theory, so as to obtain the focal length of the negative lens 17 that makes the end-pumped polycrystal series connection structure 10 in the stable region, so that the negative lens 17 can compensate the thermal lens generated by the thermal effect of the laser crystal 15, reduce the influence of the thermal effect, and obtain better beam quality. Therefore, a plurality of pumping sources 12 can be used in the same volume, so that the end-pumped polycrystalline tandem structure 10 can obtain higher pumping power, and the volume of the end-pumped polycrystalline tandem structure 10 is reduced.
Furthermore, the transmission surface of the dichroic mirror 14 is coated with an antireflection film, and the transmission surface coated with the antireflection film faces the side of the focusing mirror 13, which is helpful for enhancing the transmission rate of the pumping light emitted from the pumping source 12 and transmitted to the dichroic mirror 14 through the focusing mirror 13, the reflection surface of the dichroic mirror 14 is coated with a high reflection film, and the reflection surface coated with the high reflection film is arranged on the side away from the focusing mirror 13, and the reflection surface coated with the high reflection film can bend the laser light, so that the laser light emitted from one laser crystal 15 is bent and emitted into the next laser crystal 15, and the laser light is continuously oscillated and amplified in the next laser crystal 15, thereby improving the output power of the laser light, and further the dichroic mirror 14 bends the laser light while transmitting the pumping light.
Alternatively, the laser crystal 15 is disposed obliquely at an angle a of 30 ° to 60 ° with respect to the dichroic mirror 14. Specifically, by taking the dichroic mirror 14 in fig. 1 as a reference, the dichroic mirror 14 is horizontally arranged in a top view state, the first laser crystal 15 is arranged by inclining 30 ° to 60 ° relative to the first dichroic mirror 14, the second laser crystal 15 is arranged by inclining 30 ° to 60 ° relative to the second dichroic mirror 14, and the third laser crystal 15 is arranged by inclining 30 ° to 60 ° relative to the third dichroic mirror 14, which is beneficial for better reflection of laser light into the laser crystal 15. The preferred angle a of the inclined arrangement of the laser crystal 15 relative to the dichroic mirror 14 is 45 °, which makes the arrangement of the focusing mirror 13, the dichroic mirror 14 and the laser crystal 15 more compact, thereby reducing the volume of the end-pumped polycrystalline tandem structure 10.
Further, the end-pumped polycrystalline serial connection structure 10 further includes a high-reflection mirror 18, the high-reflection mirror 18 is configured to bend a transmission path of the laser, the high-reflection mirror 18 is disposed between the last laser crystal 15 and the polarizer 16, the high-reflection mirror 18 is disposed in parallel with the dichroic mirror 14, the laser emitted from the last laser crystal 15 irradiates a reflection surface of the high-reflection mirror 18, so that the transmission path of the laser emitted from the last laser crystal 15 is bent and then emitted into the polarizer 16, and according to the incident angle principle of the brewster angle, the polarizer 16 is disposed at an included angle b of 34 ° with respect to the light reflected from the high-reflection mirror 18, that is, the incident angle of the laser irradiated onto the polarizer 16 is 34 °, which is beneficial to converting all the laser emitted from the high-reflection mirror 18 into polarized light, improving conversion efficiency, and reducing light loss.
Optionally, according to the principle of the incident angle of the brewster angle, the polarizer 16 is disposed at an included angle of 34 ° with respect to the light emitted from the light-emitting side of the last laser crystal 15, which is beneficial to converting all the laser light emitted from the last laser crystal 15 into polarized light, improving the conversion efficiency, and reducing the light loss.
In an embodiment, the end-pumped multi-crystal serial connection structure 10 further includes a crystal seat 19 and a plurality of crystal covers 21, a surface of the crystal seat 19 is correspondingly provided with a plurality of fixing seats 20, any two adjacent fixing seats 20 are arranged in a mirror image manner, the laser crystal 15 is arranged on the fixing seats 20, the crystal covers 21 are covered on the fixing seats 20, and the focusing mirror 13, the dichroic mirror 14, the negative lens 17, the high-reflection mirror 18 and the polarizer 16 are all arranged on the surface of the crystal seat 19 and located on the same surface as the fixing seats 20, so that the end-pumped multi-crystal serial connection structure 10 is compact in structure and small in size. Specifically, the material of crystal lid 21 and crystal seat 19 is red copper gilding, and red copper gilding conduction is effectual, can carry out the heat dissipation to crystal lid 21 and crystal seat 19 with the heat conduction that laser crystal 15 produced when carrying out the pumping to the pump light on, and then reduce laser crystal 15's heat effect, obtain better beam quality.
Further, the surface that fixing base 20 and crystal seat 19 deviate from is equipped with first recess 201, and the surface that crystal lid 21 lid fits fixing base 20 is equipped with second recess 202 of first recess 201 looks adaptation, places laser crystal 15 in first recess 201 to on crystal lid 21 fits fixing base 20, and make laser crystal 15 card enter crystal lid 21 in second recess 202, first recess 201 and second recess 202 form a logical groove, set up laser crystal 15 in logical inslot, logical groove plays the effect of fixing and protecting to laser crystal 15.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An end-pumped poly tandem arrangement for enhancing laser power, said end-pumped poly tandem arrangement comprising:
the laser gain assembly comprises a pumping source, a focusing mirror, a dichroic mirror and a laser crystal, wherein the dichroic mirror is provided with a transmission surface and a reflection surface which are arranged oppositely, the pumping source, the focusing mirror and the dichroic mirror of the laser gain assembly are sequentially arranged on the light inlet side of the laser crystal along the same optical axis, the dichroic mirror is arranged in parallel, the laser crystal is obliquely arranged relative to the dichroic mirror, and the laser emitted by the laser crystal irradiates on the reflection surface of the next dichroic mirror.
2. The end-pumped poly tandem structure of claim 1, wherein the laser gain module further comprises a plurality of negative lenses, the negative lenses being disposed between the dichroic mirror and the laser crystal.
3. The end-pumped poly tandem structure of claim 1, wherein said laser crystal is tilted with respect to said dichroic mirror by an angle of 30 ° -60 °.
4. The end-pumped poly tandem structure of claim 1, further comprising a polarizer disposed on the light-emitting side of the last laser crystal, wherein the polarizer is disposed obliquely with respect to the light emitted from the light-emitting side.
5. The end-pumped poly string as claimed in claim 4, wherein the polarizer is tilted at an angle of 34 ° with respect to the light emitted from the light-emitting side.
6. The end-pumped poly tandem structure according to claim 4 or 5, further comprising a high-reflection mirror, wherein the high-reflection mirror is disposed between the last laser crystal and the polarizer, the high-reflection mirror is disposed in parallel with the dichroic mirror, and the laser emitted from the last laser crystal irradiates a reflection surface of the high-reflection mirror.
7. The end-pumped poly tandem structure of claim 1, further comprising a crystal base and a plurality of crystal covers, wherein a plurality of fixing bases are correspondingly disposed on a surface of the crystal base, any two adjacent fixing bases are arranged in a mirror image manner, the laser crystal is disposed on the fixing base, the crystal covers are covered on the fixing bases, and the focusing mirror and the dichroic mirror are disposed on the surface of the crystal base and are located on the same surface as the fixing bases.
8. The end-pumped poly tandem structure of claim 7, wherein the holder has a first recess, the crystal cover has a second recess matching the first recess, the crystal cover covers the holder, the first recess and the second recess form a through-slot, and the laser crystal is disposed in the through-slot.
9. The end-pumped poly serial connection structure of claim 1, wherein the transmission surface is adjacent to the focusing mirror and coated with an anti-reflection film, and the reflection surface is away from the focusing mirror and coated with a high-reflection film.
10. The end-pumped poly tandem structure of claim 7 or 8, wherein the material of said crystal lid and said crystal mount is gold-plated copper.
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| CN202211017434.3A CN115102015A (en) | 2022-08-24 | 2022-08-24 | End-pumped polycrystal tandem structure |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166099A (en) * | 2013-04-02 | 2013-06-19 | 西安电子科技大学 | Cascading method for gain mediums in diode pump laser |
| CN103390854A (en) * | 2013-06-26 | 2013-11-13 | 温州市德罗斯激光科技有限公司 | Double single-ended pumped two-rod series connection solid state laser |
| CN113540947A (en) * | 2021-07-05 | 2021-10-22 | 苏州英谷激光有限公司 | Double-crystal high-power green light solid laser |
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- 2022-08-24 CN CN202211017434.3A patent/CN115102015A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166099A (en) * | 2013-04-02 | 2013-06-19 | 西安电子科技大学 | Cascading method for gain mediums in diode pump laser |
| CN103390854A (en) * | 2013-06-26 | 2013-11-13 | 温州市德罗斯激光科技有限公司 | Double single-ended pumped two-rod series connection solid state laser |
| CN113540947A (en) * | 2021-07-05 | 2021-10-22 | 苏州英谷激光有限公司 | Double-crystal high-power green light solid laser |
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