CN113991405A - Multi-focus end pumping device applied to DPAL - Google Patents
Multi-focus end pumping device applied to DPAL Download PDFInfo
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- CN113991405A CN113991405A CN202111244018.2A CN202111244018A CN113991405A CN 113991405 A CN113991405 A CN 113991405A CN 202111244018 A CN202111244018 A CN 202111244018A CN 113991405 A CN113991405 A CN 113991405A
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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
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/031—Metal vapour lasers, e.g. metal vapour generation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/034—Optical devices within, or forming part of, the tube, e.g. windows, mirrors
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/101—Lasers provided with means to change the location from which, or the direction in which, laser radiation is emitted
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/104—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation in gas lasers
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Abstract
The invention provides a multifocal end face pumping device applied to DPAL (dual wavelength optical al), which comprises a semiconductor laser (1), a fast axis collimating mirror (2), a slow axis collimating mirror (3), a line width narrowing module (4), a beam shaping module (5), a multifocal lens (6) and an alkali metal vapor chamber (7) which are sequentially arranged, wherein the semiconductor laser (1) is suitable for the absorption wavelength of the DPAL, pump light emitted by the semiconductor laser (1) enters the line width narrowing module (4) after being collimated by the fast axis collimating mirror (2) and the slow axis collimating mirror (3), and the beam shaping is carried out by the beam shaping module (5) after the collimated pump light is narrowed to a preset line width; the pump light after beam shaping enters a multi-focus lens (6), the multi-focus lens (6) is used for focusing the pump light into a plurality of focuses, the focuses are located on the same axis, the multi-focus focused pump light enters a resonant cavity, and the resonant cavity emits alkali metal laser.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a multi-focus end face pumping device applied to DPAL.
Background
The pumping source of a semiconductor Pumped Alkali metal Vapor Laser (DPAL) is a semiconductor Laser (LD), and the gain medium is Alkali metal (rubidium Rb, cesium Cs, potassium K) Vapor and buffer gas (helium, hydrocarbon small molecule gas, etc.). DPAL is expected to realize high-power and high-beam-quality laser output, and has wide application prospect in the fields of industrial processing, national defense and the like.
At present, the existing DPAL end-pumped optical path structure is shown in fig. 1, and mainly comprises a semiconductor laser, a fast-slow axis collimating mirror, a line width narrowing module, a beam shaping module, and a beam focusing mirror. The pumping light emitted by the LD passes through the fast-slow axis collimating lens, the line width narrowing module and the beam shaping module and is focused to a single focus by the focusing lens, and the focus is generally positioned at the center of the air chamber. In the vicinity of the focal point, the power density of the focused pump light exceeds the threshold power density, and effective pumping can be achieved, and this region is referred to as an effective pumping region. Outside the effective pumping area, the pump light gradually diverges, and its power density decreases and is below the threshold power, which does not effectively pump the gain medium.
In implementing the concept of the present invention, the inventors found that at least the following problems exist in the related art: the pump light energy focused by the single focus is concentrated near the focus, and even if the pump light with high power is injected, the axial length of the effective gain area is not increased obviously. Therefore, the gain region of the alkali metal gas cell is not effectively utilized, the absorption efficiency of the pump light and the utilization rate of the gain medium are low, and the pumping efficiency is correspondingly limited. In addition, most of the pump light energy is focused at a single focus, which causes uneven transverse distribution of energy in the effective gain region, and is not easy to realize mode matching, thereby being difficult to output alkali metal laser with higher beam quality.
In addition, in the alkali metal vapor chamber, after the gain medium is pumped by the high-power pump light in the effective gain region, some pump light which cannot be effectively absorbed is easy to form heat accumulation, which causes serious thermal effect. The thermal effect may cause the refractive index of the gas in the alkali metal vapor chamber to change, resulting in thermal lens effect, which may adversely affect the beam quality of the alkali metal laser. The heat effect enables the temperature at the single focus to be relatively high, the temperature of the air chamber area far away from the focus to be relatively low, the temperature gradient of the air chamber is large, and the difficulty of heat management is improved. Therefore, the heat management cannot be effectively performed, so that the operating temperature in the alkali metal vapor chamber cannot be stabilized at the optimum operating temperature, and the output power and the beam quality of the alkali metal cannot be stabilized.
Disclosure of Invention
In view of the above-identified deficiencies of the prior art, the present invention provides a multi-focal end pumping arrangement for use in DPAL.
The invention provides a multi-focus end face pumping device applied to DPAL, which comprises a semiconductor laser 1, a fast axis collimating mirror 2, a slow axis collimating mirror 3, a line width narrowing module 4, a beam shaping module 5, a multi-focus lens 6 and an alkali metal vapor chamber 7 which are arranged in sequence; the semiconductor laser 1 is suitable for the absorption wavelength of DPAL, pump light emitted by the semiconductor laser 1 enters the line width narrowing module 4 after being collimated by the fast axis collimating mirror 2 and the slow axis collimating mirror 3, and beam shaping is carried out in the beam shaping module 5 after the collimated pump light is narrowed to a preset line width; the pump light after beam shaping enters a multi-focus lens 6, the multi-focus lens 6 is used for focusing the pump light into a plurality of focuses which are positioned on the same axis, the pump light focused by the multi-focus lens enters a resonant cavity, and the alkali metal laser is emitted from the resonant cavity.
Optionally, the multifocal lens 6 is a single multifocal lens or a plurality of constituent multifocal lens groups.
Optionally, the multifocal lens 6 comprises a fresnel lens or a diffractive multifocal lens.
Optionally, a laser beam expander 8 is further disposed between the beam shaping module 5 and the multifocal lens 6, and the laser beam expander 8 is used for compressing a divergence angle of the laser beam.
Optionally, the laser beam expander 8 is a single beam expander or a plurality of beam expander sets.
Optionally, the expander lens group comprises a transmissive expander telescope, a galilean type or a kepler type.
Optionally, the plurality of focuses focused by the multifocal lens 6 are uniformly distributed on the same axis.
Alternatively, the resonator cavity includes an alkali metal vapor cell 7, and a resonator cavity mirror 9 provided on the incident and exit optical paths of the alkali metal vapor cell 7.
Optionally, the plurality of focal points are located on an axis coincident with the optical axis of the alkali metal laser.
Alternatively, the number or the interval of the plurality of focal points is determined according to at least one condition of the length of the alkali metal vapor chamber 7, the alkali metal vapor density, the buffer gas pressure, and the pump light intensity.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the invention is particularly suitable for DPAL (dual-pump laser) adopting high-power pump light, and the pump light can keep higher pump power density in a longer effective pump area obtained by multi-section accumulation, thereby improving the pump efficiency;
(2) the invention is particularly suitable for the alkali metal laser with a longer alkali metal vapor chamber, and the gain medium is pumped at a plurality of focuses simultaneously, so that the utilization rate of the gain medium is increased, and the pumping power is improved;
(3) the invention adopts a multi-focus pumping mode to axially distribute the pump light energy along the optical axis, and the axial distribution mode ensures that the high-power pump light cannot be gathered at a single focus, thereby avoiding the transverse widening of a gain region, ensuring that the transverse distribution of the pump light energy is more uniform, better realizing mode matching and further obtaining the alkali metal laser with higher beam quality;
(4) the invention ensures that the pumping energy in the alkali metal vapor chamber is distributed along the axial direction in multiple sections, so that the gas temperature is distributed more uniformly, the temperature regulation module outside the alkali metal vapor chamber can more effectively regulate and control the temperature in the alkali metal vapor chamber to maintain the optimal working temperature, the influence of the thermal lens effect is avoided to a certain extent, and the alkali metal laser with more stable light beam quality can be obtained.
Drawings
FIG. 1 schematically illustrates an optical path structure of a prior art DPAL end-pumping device;
figure 2 schematically illustrates an optical path diagram of a multi-focus end-pumping arrangement applied to a DPAL according to an embodiment of the present invention.
[ description of reference ]
1-a semiconductor laser; 2-fast axis collimating mirror; 3-slow axis collimating mirror; 4-line width narrowing module; 5-a beam shaping module; 6-multifocal lens; 7-alkali metal vapor chamber; 8-a laser beam expander; 9-resonant cavity mirror.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "assembled," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
Figure 2 schematically illustrates an optical path diagram of a multi-focus end-pumping arrangement applied to a DPAL according to an embodiment of the present invention.
As shown in fig. 2, the multi-focus end-face pumping device applied to DPAL in the embodiment of the present invention includes a semiconductor laser 1, a fast axis collimator 2, a slow axis collimator 3, a line width narrowing module 4, a beam shaping module 5, a multi-focus lens 6, and an alkali vapor chamber 7, which are sequentially disposed.
The semiconductor laser 1 is suitable for the absorption wavelength of DPAL, pump light emitted by the semiconductor laser 1 enters the line width narrowing module 4 after being collimated by the fast axis collimating mirror 2 and the slow axis collimating mirror 3, and beam shaping is carried out in the beam shaping module 5 after the collimated pump light is narrowed to a preset line width;
the pump light after beam shaping enters a multi-focus lens 6, the multi-focus lens 6 is used for focusing the pump light into a plurality of focuses which are positioned on the same axis, the pump light focused by the multi-focus lens enters a resonant cavity, and the alkali metal laser is emitted from the resonant cavity.
With the embodiment of the present invention, the exit surface of the semiconductor laser 1 is equipped with a Fast Axis Collimator (FAC) for collimating the LD Fast Axis. A Slow Axis Collimator (SAC) is installed behind the fast Axis Collimator 2 to collimate the Slow Axis.
Since the absorption linewidth of D2 of alkali metal atoms is very narrow, the typical high-power LD linewidth is much wider than the absorption linewidth of alkali metal atoms. In order to improve the absorption of the pump light by the alkali metal vapor, the laser line width of the LD needs to be narrowed. Therefore, the LD can enter the line width narrowing module to narrow the line width after being collimated.
Because the difference of the beam parameter products of the fast and slow axes of the laser can reach hundreds of times, a common focusing system can not obtain a nearly circular light spot, and the light beam needs to be shaped to reduce the difference of the beam parameter products of the fast and slow axes. The pump light after passing through the beam shaping module can be better matched with the mode of the resonant tank, and the absorption efficiency of the gain medium on the pump light is improved.
Therefore, after the pump light collimated by the fast and slow axes is narrowed to a proper line width by the line width narrowing module 4, the beam shaping module 5 shapes the beam to match the mode of the alkali metal laser. The multi-focal lens 6 then focuses the beam-shaped pump light into multiple focal points, which may be located on the same axis, for example, see f0, f1, and f2 in fig. 2.
By adopting the embodiment of the invention, the multi-focus pumping mode is adopted, so that the pumping light energy is axially distributed along the optical axis. The axial distribution mode ensures that the high-power pump light cannot be gathered at a single focus, thereby avoiding the transverse widening of a gain region and ensuring that the transverse distribution of the pump light energy is more uniform. The mode matching can be better realized, and the alkali metal laser with higher beam quality can be obtained.
In some embodiments, the multifocal lens 6 is a single multifocal lens or a plurality of constituent multifocal lens groups.
In some embodiments, the multifocal lens 6 comprises a fresnel lens or a diffractive multifocal lens. It will be appreciated that in other embodiments, the multifocal lens 6 may be other desirable lenses.
Preferably, the plurality of focuses of the multifocal lens 6 are uniformly distributed on the same axis. That is, for example, f0, f1, and f2 in fig. 2 are equally spaced on the same axis.
In order to improve the quality of the outgoing beam of the alkali metal vapor chamber 7, in some embodiments, the axes of the multiple focal points of the multifocal lens 6 coincide with the optical axis of the alkali metal laser.
In some embodiments, a laser beam expander 8 is further disposed between the beam shaping module 5 and the multi-focal lens 6, and the laser beam expander 8 is used for compressing the divergence angle of the laser beam.
Further, the laser beam expander 8 is a single beam expander or a plurality of beam expander sets.
Wherein the beam expander set comprises a transmission type beam expander telescope, a Galileo type or a Kepler type.
According to the embodiment of the invention, the pump light after beam shaping can be incident to the laser beam expander 8, the laser beam expander 8 can compress the divergence angle of the laser beam, and the expanded pump light can be approximately regarded as a parallel beam, so that the pump light can be focused into a light spot with a smaller size, and the mode of the alkali metal laser can be matched more easily. The expanded pump light is then incident on the multifocal lens 6.
In the embodiment of the invention, the resonant cavity comprises an alkali metal vapor chamber 7 and a resonant cavity mirror 9 arranged on the incident and emergent light paths of the alkali metal vapor chamber 7. Therefore, the alkali metal vapor chamber 7 and the resonant cavity mirror 9 jointly form a resonant cavity, and the pumping light enters the resonant cavity to emit alkali metal laser.
Further, the number or the pitch of the plurality of focal points of the multifocal lens 6 may also be determined according to at least one condition of the alkali metal vapor chamber 7 length, the alkali metal vapor density, the buffer gas pressure, and the pump light intensity.
With continued reference to fig. 2, the multi-focus end pumping apparatus of the present invention operates according to the following principle: the pump light focused by the multi-focus focusing lens 6 is incident from the end surface to the alkali metal vapor chamber 7, and a plurality of focuses of the pump light fall within the alkali metal vapor chamber 7. Therefore, in a plurality of focus adjacent areas with the pumping power density exceeding the threshold power density, the pumping light can be effectively absorbed by the gain medium, the gain medium in the air chamber is effectively utilized, and the pumping efficiency is effectively improved; after the high-power pump light is distributed along the axial direction, the effective gain area is not widened transversely any more, the transverse distribution of energy is more uniform, and the mode matching is easier to realize so as to obtain the alkali metal laser with better beam quality; and the temperature distribution in the air chamber is more uniform, the influence of the heat effect is reduced, the heat management is more convenient, and the beam quality of the alkali metal laser is more stable.
In summary, embodiments of the present invention provide a multi-focus end pumping apparatus applied to a DPAL, where a multi-focus pumping manner is adopted, pump light energy is distributed along an optical axis in an axial direction, so that high-power pump light is not concentrated at a single focus, thereby avoiding lateral widening of a gain region, and lateral distribution of pump light energy is more uniform. The invention can better realize mode matching, thereby obtaining the alkali metal laser with higher beam quality.
It should also be noted that throughout the drawings, like elements are represented by like or similar reference numerals. And conventional structures or constructions will be omitted when they may obscure the understanding of the present invention. And the shapes, sizes and positional relationships of the components in the drawings do not reflect the actual sizes, proportions and actual positional relationships.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The multi-focus end face pumping device applied to the DPAL is characterized by comprising a semiconductor laser (1), a fast axis collimating mirror (2), a slow axis collimating mirror (3), a line width narrowing module (4), a beam shaping module (5), a multi-focus lens (6) and an alkali metal vapor chamber (7) which are sequentially arranged;
the semiconductor laser (1) is suitable for the absorption wavelength of the DPAL, pump light emitted by the semiconductor laser (1) enters the line width narrowing module (4) after being collimated by the fast axis collimating mirror (2) and the slow axis collimating mirror (3), and is subjected to beam shaping in the beam shaping module (5) after being narrowed to a preset line width;
the pump light after beam shaping is incident to a multi-focus lens (6), the multi-focus lens (6) is used for focusing the pump light into a plurality of focuses, the focuses are located on the same axis, the multi-focus focused pump light is incident to a resonant cavity, and the resonant cavity emits alkali metal laser.
2. Multi-focal end pumping device for application to a DPAL according to claim 1, wherein the multi-focal lens (6) is a single multi-focal lens or a multi-focal lens group of multiple components.
3. Multi-focal end-pumping device for application to a DPAL according to claim 1, wherein the multi-focal lens (6) comprises a fresnel lens or a diffractive multi-focal lens.
4. The multi-focal end-pumping device applied to DPAL of claim 1, wherein a laser beam expander (8) is further arranged between the beam shaping module (5) and the multi-focal lens (6), said laser beam expander (8) being used for compressing the divergence angle of the laser beam.
5. The multi-focal end-pumping device for application to a DPAL according to claim 4, wherein said laser beam expander lens (8) is a single beam expander lens or a multi-constituent beam expander lens group.
6. A multi-focal end pumping device for use in a DPAL according to claim 5, wherein the beam expander set comprises a transmissive beam expander telescope, Galileo or Kepler.
7. A multi-focal end pumping device as claimed in claim 1, applied to a DPAL, wherein the multiple focal points of the multi-focal lens (6) are uniformly distributed on the same axis.
8. A multi-focal end-pumping arrangement for application to a DPAL as claimed in claim 1, wherein the resonant cavity comprises an alkali metal vapor chamber (7), and resonant cavity mirrors (9) arranged in the path of the alkali metal vapor chamber (7) incident and exiting light.
9. A multi-focal end pumping device for use in a DPAL as claimed in claim 1, wherein the plurality of focal points are located on an axis which coincides with the optical axis of the alkali laser.
10. Multi-focal end pumping apparatus as claimed in claim 8, applied to a DPAL, wherein the number or spacing of said plurality of focal points is determined in dependence on at least one of the alkali metal vapour chamber (7) length, alkali metal vapour density, buffer gas pressure and pump light intensity.
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| CN202111244018.2A CN113991405A (en) | 2021-10-25 | 2021-10-25 | Multi-focus end pumping device applied to DPAL |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5202893A (en) * | 1990-07-30 | 1993-04-13 | Sony Corporation | End pumped solid-state laser |
| CN106898937A (en) * | 2017-02-16 | 2017-06-27 | 中国科学院电子学研究所 | The alkali metal laser of the axial pumping of semiconductor laser side face coupling |
| CN108899753A (en) * | 2018-08-21 | 2018-11-27 | 深圳市格镭激光科技有限公司 | A kind of end face uniform pumping solid state laser |
-
2021
- 2021-10-25 CN CN202111244018.2A patent/CN113991405A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5202893A (en) * | 1990-07-30 | 1993-04-13 | Sony Corporation | End pumped solid-state laser |
| CN106898937A (en) * | 2017-02-16 | 2017-06-27 | 中国科学院电子学研究所 | The alkali metal laser of the axial pumping of semiconductor laser side face coupling |
| CN108899753A (en) * | 2018-08-21 | 2018-11-27 | 深圳市格镭激光科技有限公司 | A kind of end face uniform pumping solid state laser |
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