CN210379760U - High-stability fundamental mode green laser for laser crystal thermal lens effect real-time compensation - Google Patents
High-stability fundamental mode green laser for laser crystal thermal lens effect real-time compensation Download PDFInfo
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- CN210379760U CN210379760U CN201921073325.7U CN201921073325U CN210379760U CN 210379760 U CN210379760 U CN 210379760U CN 201921073325 U CN201921073325 U CN 201921073325U CN 210379760 U CN210379760 U CN 210379760U
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Abstract
The utility model relates to a laser technical field specifically is laser crystal thermal lens effect real-time compensation's green laser of high stability basic mode, including the resonant cavity, be provided with semiconductor diode pumping source in the resonant cavity, laser crystal and second plane mirror, two aspheric lens have been arranged in proper order to the output of semiconductor diode pumping source, and first plane mirror is arranged to the output of aspheric lens, and the output of first plane mirror links up and directs light incident lens piece, and laser crystal guides light plane lens piece and facula monitoring CCD system, and second plane mirror links up two frequency doubling nonlinear optical crystals and third plane mirror. The utility model adopts a semiconductor diode pump with 808nm wave band and Nd, YVO4 crystal to realize high-power 532nm green light high-stability basic mode laser output, and a laser crystal thermal lens effect test and compensation system enables the laser to be kept in the stable operation of the basic mode in real time. The utility model discloses high efficiency, high power and compact structure have that the light beam is of high quality, and the operation is stable, characteristics such as basic mode output.
Description
Technical Field
The utility model relates to a laser technical field specifically is laser crystal thermal lens effect real-time compensation's green laser of high stability basic mode.
Background
The all-solid-state laser has the characteristics of small volume, high power, tunable wavelength and the like, particularly the high-stability laser operated in a basic mode has the advantages of long coherent coherence length, good beam quality and narrow spectral line width which are difficult to achieve by a common laser besides good monochromaticity and directivity, and has wide application in the fields of laser radar, laser ranging, laser remote sensing, laser medical treatment, spectroscopy, optical frequency standards, nonlinear optical frequency conversion and the like. In recent years, research on high-power laser operation, particularly stable operation of a laser, has become a research hotspot in the field of laser technology, and the market prospect is very wide.
In an end-pumped laser, the thermal effects of the laser crystal have a large impact on the stability and output spot mode of the laser. As the machine runs, the thermal lens effect fluctuates microscopically, which can affect the stability of the laser cavity and thus the laser output parameters.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a laser crystal thermal lens effect real-time compensation's green laser of high stability basic mode to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the high-stability fundamental mode green laser with the laser crystal thermal lens effect real-time compensation function comprises a resonant cavity, wherein a semiconductor diode pumping source, a laser crystal and a second plane mirror are arranged in the resonant cavity, two aspheric lenses are sequentially arranged at the output end of the semiconductor diode pumping source, a first plane mirror is arranged at the output end of each aspheric lens, the output end of each first plane mirror is connected with a guide light incidence lens, a sighting laser is arranged above each guide light incidence lens, the laser crystal guide light plane lens and a light spot monitoring CCD system are arranged, and the second plane mirror is connected with a second frequency doubling nonlinear optical crystal and a third plane mirror.
As a further aspect of the present invention: the semiconductor diode pump source is a semiconductor diode pump with an output wavelength of 808 nm.
As a further aspect of the present invention: the light spot monitoring CCD system adopts a CCD camera.
As a further aspect of the present invention: and a 808nm pump light antireflection film is plated on the left end face of a first plane mirror in the resonant cavity, and a 808nm antireflection film and a 1064nm high-reflection film are plated on the right end face of the first plane mirror.
As a further aspect of the present invention: YVO4, and the size of the laser crystal is 3X 25mm3The crystal doping concentration is 0.1%.
As a further aspect of the present invention: and both ends of the frequency doubling nonlinear optical crystal are plated with anti-reflection films of 1064nm and 532 nm.
As a further aspect of the present invention: the type of the frequency doubling nonlinear optical crystal is one of LBO, KTP, periodic polarization crystal PPLN, MgO PPLN, PPSLT, PPLT and PPKTP.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts a semiconductor diode pump with 808nm wave band and Nd, YVO4 crystal to realize high-power 532nm green light high-stability basic mode laser output, and a laser crystal thermal lens effect test and compensation system enables the laser to be kept in the stable operation of the basic mode in real time. The utility model discloses high efficiency, high power and compact structure have that the light beam is of high quality, and the operation is stable, characteristics such as basic mode output.
Drawings
Fig. 1 is a schematic structural diagram of the device.
1-semiconductor diode pumping source, 2-aspheric lens, 3-first plane mirror, 4-guiding light incidence lens, 5-aiming laser, 6-laser crystal, 7-guiding light plane lens, 8-light spot monitoring CCD system, 9-second plane mirror, 10-double frequency nonlinear optical crystal, 11-third plane mirror and 12-resonant cavity.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example one
Referring to fig. 1, the embodiment of the utility model provides a green laser of high stability basic mode of laser crystal thermal lens effect real-time compensation, including resonant cavity 12, be provided with semiconductor diode pump source 1, laser crystal 6 and second plane mirror 9 in the resonant cavity 12, two aspheric lens 2 have been arranged in proper order to semiconductor diode pump source 1's output, first plane mirror 3 is arranged to aspheric lens 2's output, first plane mirror 3's output links up and directs light incident lens 4, it is provided with aiming laser 5 to direct light incident lens 4 top, laser crystal 6 directs light plane lens 7 and facula monitoring CCD system 8, second plane mirror 9 links up two frequency doubling nonlinear optical crystal 10 and third plane mirror 11.
The laser diode pumping source 1 is a semiconductor diode pump with an output wavelength of 808nm, the light spot monitoring CCD system 8 adopts a CCD camera, a 808nm pumping light antireflection film is plated on the left end face of a first plane mirror 3 in the resonant cavity 12, an 808nm antireflection film and a 1064nm high-reflection film are plated on the right end face of the first plane mirror 3, the laser crystal 6 is Nd: YVO4, the size of the laser crystal 6 is 3 x 25mm3, the crystal doping concentration is 0.1%, and antireflection films with the thickness of 1064nm and 532nm are plated at two ends of the frequency doubling nonlinear optical crystal 10.
808nm pump light output by the semiconductor diode pump source 1 is coupled into the laser crystal 6 through the aspheric lens 2 and the first plane mirror 3, the generated 1064nm laser oscillates in a resonant cavity formed by the first plane mirror 3, the second plane mirror 9 and the third plane mirror 11, and the 1064nm fundamental frequency light passes through the frequency doubling nonlinear optical crystal 10 twice to convert the 1064nm fundamental frequency light into 532nm frequency doubling light. A semiconductor diode is used as a pumping source, 808nm pumping light is output and passes through an aspheric optical collimation system consisting of two aspheric lenses, fundamental frequency light oscillation is formed by a laser crystal and a resonant cavity, and the fundamental frequency light oscillation is simultaneously injected into a frequency-doubled nonlinear optical crystal to carry out conversion from 1064nm fundamental frequency light to 532nm frequency-doubled light.
A thermal lens effect test system is introduced into a resonant cavity 12 to monitor the thermal lens effect of a laser crystal in real time and automatically adjust the parameters of the laser resonant cavity according to the change of the thermal lens effect test system, so as to ensure the stability of the output parameters of a laser, a thermal lens effect real-time monitoring system is connected into the resonant cavity 12, namely, a beam of guide light irrelevant to the intracavity fundamental frequency light is incident to a laser crystal 6 which is working, a CCD camera is used for monitoring the spot change of the guide light, the thermal lens effect change is monitored in real time, the temperature control value of the laser crystal 6 is adjusted according to the data of the spot change of the guide light, so as to control the thermal lens focal length of the laser crystal 6 to be at a stable level, so as to realize the high stability of the laser resonant cavity and the output of high-stability green laser, and adopt a semiconductor diode pump 1 and Nd with 808nm wave bands to realize the output of high-power green high-stability fundamental mode laser of, the laser crystal thermal lens effect testing and compensating system enables the laser to be kept in the stable operation of the basic mode in real time. The utility model discloses high efficiency, high power and compact structure have that the light beam is of high quality, and the operation is stable, characteristics such as basic mode output.
Measuring the mass molecule M of the light beam by a light beam mass analyzer when the laser power is 10W2<1.3. The stability of the laser device in 8 hours can be seen to be less than 1%, and the stability of the beam quality is better than 1%.
Example two
On the basis of the first embodiment, the frequency doubling nonlinear optical crystal 10 is one of LBO, KTP, periodic poled crystal PPLN, MgO PPLN, PPSLT, PPLT and PPKTP.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The high-stability fundamental mode green laser with the laser crystal thermal lens effect real-time compensation function comprises a resonant cavity (12), wherein a semiconductor diode pump source (1), a laser crystal (6) and a second plane mirror (9) are arranged in the resonant cavity (12), two aspheric lenses (2) are sequentially arranged at the output end of the semiconductor diode pump source (1), the high-stability fundamental mode green laser is characterized in that a first plane mirror (3) is arranged at the output end of the aspheric lens (2), the output end of the first plane mirror (3) is connected with a guide light incidence lens (4), a sighting laser (5) is arranged above the guide light incidence lens (4), the laser crystal (6) guides a light plane lens (7) and a light spot monitoring CCD system (8), and the second plane mirror (9) is connected with a second frequency doubling nonlinear optical crystal (10) and a third plane mirror (11).
2. The laser crystal thermal lens effect real-time compensated high stability fundamental mode green laser of claim 1, characterized by that, the semiconductor diode pump source (1) is a semiconductor diode pump with output wavelength of 808 nm.
3. The laser crystal thermal lens effect real-time compensated high stability fundamental mode green laser according to claim 1 or 2, characterized in that the spot monitoring CCD system (8) employs a CCD camera.
4. The high-stability fundamental mode green laser for real-time compensation of laser crystal thermal lens effect according to claim 1, wherein a left end face of the first plane mirror (3) in the resonant cavity (12) is coated with a 808nm pump light antireflection film, and a right end face of the first plane mirror (3) is coated with a 808nm antireflection film and a 1064nm high reflection film.
5. The high-stability fundamental-mode green laser with real-time compensation of laser crystal thermal lens effect according to claim 1, wherein the laser crystal (6) is Nd: YVO4, and the size of the laser crystal (6) is 3 x 25mm3。
6. The laser crystal thermal lens effect real-time compensation high-stability fundamental mode green laser according to claim 1, wherein both ends of the frequency doubling nonlinear optical crystal (10) are coated with antireflection films of 1064nm and 532 nm.
7. The laser crystal thermal lensing effect real-time compensated high stability fundamental mode green laser of claim 1 or 6, wherein the type of the frequency doubling nonlinear optical crystal (10) is one of LBO, KTP, periodic poled crystal PPLN, MgO PPLN, PPSLT, PPLT, PPKTP.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467511A (en) * | 2020-11-25 | 2021-03-09 | 中国工程物理研究院上海激光等离子体研究所 | Near-field filtering and laser transverse mode control system and control method based on nonlinear frequency conversion |
| CN113381276A (en) * | 2021-04-30 | 2021-09-10 | 北京航天控制仪器研究所 | Laser crystal thermal lens effect self-compensating device |
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2019
- 2019-07-10 CN CN201921073325.7U patent/CN210379760U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467511A (en) * | 2020-11-25 | 2021-03-09 | 中国工程物理研究院上海激光等离子体研究所 | Near-field filtering and laser transverse mode control system and control method based on nonlinear frequency conversion |
| CN112467511B (en) * | 2020-11-25 | 2022-03-22 | 中国工程物理研究院上海激光等离子体研究所 | Near-field filtering and laser transverse mode control system and control method based on nonlinear frequency conversion |
| CN113381276A (en) * | 2021-04-30 | 2021-09-10 | 北京航天控制仪器研究所 | Laser crystal thermal lens effect self-compensating device |
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