CN110783803A - Frequency doubling crystal electric control point shifting device for solid laser - Google Patents
Frequency doubling crystal electric control point shifting device for solid laser Download PDFInfo
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- CN110783803A CN110783803A CN201911019418.6A CN201911019418A CN110783803A CN 110783803 A CN110783803 A CN 110783803A CN 201911019418 A CN201911019418 A CN 201911019418A CN 110783803 A CN110783803 A CN 110783803A
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- sliding table
- frequency doubling
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- doubling crystal
- frequency
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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
- H01S3/025—Constructional details of solid state lasers, e.g. housings or mountings
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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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
- H01S3/109—Frequency multiplication, e.g. harmonic 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention belongs to the field of industrial lasers, and particularly relates to an electronic control point shifting device of a frequency doubling crystal for a solid laser, which comprises: compared with the prior art, the crystal temperature measuring device has the beneficial effects that: the vertical sliding table and the horizontal sliding table are respectively controlled by the stepping motor and the precise threads, the moving precision is high, the vertical sliding table and the horizontal sliding table can move on two-dimensional planes in the vertical direction and the horizontal direction as required, the moving range is large, and the utilization rate of the frequency doubling crystal is high. The frequency doubling crystal electric control point shifting device provided by the invention has high reliability and good repeatability.
Description
Technical Field
The invention belongs to the field of industrial lasers, and particularly relates to an electronic control point shifting device for a frequency doubling crystal of a solid laser.
Background
The ultraviolet laser has short wavelength, small focusing light spot and large photon energy, can directly destroy the molecular bonds of a plurality of non-metallic materials in the material processing process to realize cold processing, and has smooth material edges and small carbonization.
The reliable and stable output of high-power ultraviolet laser with the power of more than 8W is realized, 1064nm infrared fundamental frequency laser is required to be capable of generating high-power base film oscillation with high beam quality, a laser crystal has thermal lens and thermal birefringence effect as small as possible, and meanwhile, in order to realize the best nonlinear polarization matching, the ultraviolet nonlinear crystal and green light nonlinear crystal are required to be convenient to adjust.
CN205543662U, a utility model patent named uv laser discloses such a technical solution: the utility model provides an ultraviolet laser, a first pump laser light source; a second pump laser light source; a first lens; a second lens; a laser crystal module; an infrared laser total reflection mirror; an acousto-optic Q switch; the frequency tripling crystal module comprises a frequency tripling crystal and a frequency tripling crystal seat, wherein the frequency tripling crystal is fixed on the frequency tripling crystal seat, and three rotational degrees of freedom of the frequency tripling crystal can be adjusted through the frequency tripling crystal seat; the frequency doubling crystal module comprises a frequency doubling crystal and a frequency doubling crystal seat, the frequency doubling crystal is fixed on the frequency doubling crystal seat, and three rotational degrees of freedom of the frequency doubling crystal can be adjusted through the frequency doubling crystal seat; a mirror tail; a green light absorption cell for absorbing green laser light; the pump laser light emitted by the first pump laser light source enters the laser crystal module through the first lens, and the pump laser light emitted by the second pump laser light source enters the laser crystal module through the second lens; the pump laser emitted by the first pump laser light source and the pump laser emitted by the second pump laser light source generate fundamental mode oscillation in the laser crystal module and output fundamental frequency laser, the infrared laser total reflection mirror reflects the fundamental frequency laser to the acousto-optic Q switch, and the acousto-optic Q switch modulates continuous fundamental frequency laser into pulse fundamental frequency laser and outputs the pulse fundamental frequency laser; the pulse fundamental frequency laser sequentially passes through the triple frequency crystal and the double frequency crystal and then is reflected back to the double frequency crystal by a reflecting tail mirror; the double frequency crystal generates green laser and outputs the green laser to the triple frequency crystal, and the triple frequency crystal generates ultraviolet laser; the green laser which is not converted into the ultraviolet laser in the frequency tripling crystal is emitted into the green light absorption cell and is absorbed by the green light absorption cell. The technical scheme mainly solves the problems of 1, reducing the thermal resistance of the heat dissipation thermal coupling of the laser crystal and accelerating the heat dissipation of the laser crystal. 2. The double frequency crystal and the triple frequency crystal are working substances for generating green light and ultraviolet light, and because polarization matching in the double frequency process and the triple frequency process is involved, in order to achieve the optimal frequency doubling and sum frequency efficiency, three rotational degrees of freedom of the two crystals and adjustment of three rotational directions are required to be finely adjusted besides the adjustment of the matching temperature of the two crystals, and a crystal seat is required to be fixed after each crystal is adjusted to prevent dislocation. Generally, two crystals are adjusted on the same mounting base, and fastening screws are loosened during adjustment and then fastened after adjustment. However, the adjusted crystal position is changed, the other two degrees of freedom are affected when one degree of freedom is adjusted, the crystal is difficult to adjust to the optimal position and fasten all the time, and the method is very tedious and time-consuming. Meanwhile, because one crystal mounting seat is shared, the adjustment of one crystal can affect the other crystal, and the effect can be achieved only by repeatedly debugging, so that a lot of time is wasted. The utility model discloses a technical scheme structure that reveals is complicated, complex operation. Is not suitable for industrial large-scale application.
The laser frequency doubling technology is to change the laser frequency to expand the laser to shorter wavelengths, so as to obtain laser wavelengths with wider range. The basic principle of laser frequency doubling is that light with frequency omega passes through a frequency doubling crystal to generate a frequency doubling effect, and emergent light of the frequency doubling crystal contains components of 2 omega light, so that laser with the wavelength reduced by half is obtained, for example, laser with the wavelength of 1064nm can obtain laser with the wavelength of 532nm after passing through a KTP frequency doubling crystal. The frequency and power of the obtained frequency doubling light are lower than those of the fundamental frequency light, and the quality and power of the frequency doubling light depend on the self attribute of the frequency doubling crystal and the control of the use method of the frequency doubling crystal. The frequency doubling crystal is sensitive to temperature, and different temperatures have great influence on the quality and power of frequency doubling light. Meanwhile, the position of the frequency doubling crystal relative to the fundamental frequency light is also required to be accurate, and the adjustable frequency doubling crystal has great benefits on the quality and the power of the frequency doubling light along the horizontal and vertical directions of the fundamental frequency light.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an electric control point shifting device of a frequency doubling crystal for a solid laser.
The technical scheme of the invention is as follows: an electrically controlled frequency doubling crystal point shifting device for a solid laser, comprising: perpendicular slip table, doubling of frequency crystal temperature measurement part, heating rod, horizontal slip table, base, first step motor, slip table riser, crystal seat, crystal briquetting, slip table base, second step motor, be equipped with the slip table riser on the base, the top of slip table riser is equipped with first step motor, first step motor drive perpendicular slip table, horizontal slip table is located the lower part of slip table riser, be equipped with doubling of frequency crystal temperature measurement part and heating rod between perpendicular slip table and the horizontal slip table, the crystal seat moves on perpendicular slip table, the crystal briquetting is in move on the horizontal slip table, be equipped with the slip table base between horizontal slip table and the crystal briquetting, the side of horizontal slip table is equipped with the drive of second step motor. The vertical sliding table and the horizontal sliding table are controlled by the stepping motor and the precise threads, the moving precision is high, the vertical sliding table and the horizontal sliding table can move on two-dimensional planes in the vertical direction and the horizontal direction as required, the moving range is large, and the utilization rate of the frequency doubling crystal is high.
Further, the first stepping motor and the second stepping motor are direct current precision stepping motors.
Further, the frequency doubling crystal temperature measuring component is a thermistor.
Further, the frequency doubling crystal temperature regulating component is a heating rod or a TEC (thermoelectric cooler), and the TEC is made by utilizing the Peltier effect of semiconductor materials.
Further, the frequency doubling crystal is one of LBO, KDP, BBO and CBO.
Compared with the prior art, the invention has the beneficial effects that: the vertical sliding table and the horizontal sliding table are respectively controlled by the stepping motor and the precise threads, the moving precision is high, the vertical sliding table and the horizontal sliding table can move on two-dimensional planes in the vertical direction and the horizontal direction as required, the moving range is large, and the utilization rate of the frequency doubling crystal is high. The frequency doubling crystal electric control point shifting device provided by the invention has high reliability and good repeatability.
Drawings
FIG. 1: the invention has a structure schematic diagram;
in the figure: 1. the vertical sliding table 2, the frequency doubling crystal temperature measuring part 3, the frequency doubling crystal temperature regulating part 4, the horizontal sliding table 5, the base 6, the first stepping motor 7, the sliding table vertical plate 8, the crystal seat 9, the crystal pressing block 10, the sliding table base 11 and the second stepping motor.
Detailed Description
Example one
As shown in the figure, the electronically controlled point shifting device for the frequency doubling crystal of the solid laser is characterized in that a sliding table vertical plate 7 is arranged on a base 5, a first stepping motor 6 is arranged at the top of the sliding table vertical plate 7, the first stepping motor 6 drives a vertical sliding table 1, a horizontal sliding table 4 is positioned at the lower part of the sliding table vertical plate 7, a frequency doubling crystal temperature measuring component 2 and a frequency doubling crystal temperature regulating component 3 are arranged between the vertical sliding table 1 and the horizontal sliding table 4, a crystal seat 8 moves on the vertical sliding table 1, a crystal pressing block 9 moves on the horizontal sliding table 4, a sliding table base 10 is arranged between the horizontal sliding table 4 and the crystal pressing block 9, and a second stepping motor 11 is arranged on the side surface of the horizontal sliding table 4. The first stepping motor 6 and the second stepping motor 11 are direct current precision stepping motors, the frequency doubling crystal temperature measuring component 2 is a thermistor, the frequency doubling crystal temperature regulating component 3 is a heating rod, and the frequency doubling crystal is LBO.
Example two
The difference between the other embodiments is that the frequency doubling crystal temperature regulating component 3 is a TEC, and the frequency doubling crystal is a CBO.
Although embodiments of the present invention have been shown and described, it will be understood that the embodiments described above are illustrative and should not be construed as limiting the invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the embodiments described above without departing from the spirit and scope of the invention, and that such changes, modifications, substitutions and alterations in combination are intended to be included within the scope of the invention.
Claims (5)
1. An electrically controlled point shifting device of frequency doubling crystal for solid laser is characterized by comprising: the crystal temperature measurement device comprises a vertical sliding table, a frequency doubling crystal temperature measurement component, a frequency doubling crystal temperature regulation component, a horizontal sliding table, a base, a first step motor, a vertical sliding table plate, a crystal seat, a crystal pressing block, a sliding table base and a second step motor, wherein the vertical sliding table plate is arranged on the base, the top of the vertical sliding table plate is provided with the first step motor, the first step motor drives the vertical sliding table, the horizontal sliding table is located at the lower part of the vertical sliding table plate, the frequency doubling crystal temperature measurement component and the frequency doubling crystal temperature regulation component are arranged between the vertical sliding table and the horizontal sliding table, the crystal seat moves on the vertical sliding table, the crystal pressing block moves on the horizontal sliding table, the sliding table base is arranged between the horizontal sliding table and the crystal pressing block, and the.
2. The electrically-controlled point shifting device of frequency doubling crystal for solid laser as claimed in claim 1, wherein: the first stepping motor and the second stepping motor are direct current precision stepping motors.
3. The electrically-controlled point shifting device of frequency doubling crystal for solid laser as claimed in claim 1, wherein: the frequency doubling crystal temperature measurement component is a thermistor.
4. The electrically-controlled point shifting device of frequency doubling crystal for solid laser as claimed in claim 1, wherein: and the frequency doubling crystal temperature regulating component is a heating rod or a TEC.
5. The electrically-controlled point shifting device of frequency doubling crystal for solid laser as claimed in claim 1, wherein: the frequency doubling crystal is one of LBO, KDP, BBO and CBO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019418.6A CN110783803A (en) | 2019-10-24 | 2019-10-24 | Frequency doubling crystal electric control point shifting device for solid laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911019418.6A CN110783803A (en) | 2019-10-24 | 2019-10-24 | Frequency doubling crystal electric control point shifting device for solid laser |
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| Publication Number | Publication Date |
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| CN110783803A true CN110783803A (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911019418.6A Pending CN110783803A (en) | 2019-10-24 | 2019-10-24 | Frequency doubling crystal electric control point shifting device for solid laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186488A (en) * | 2020-10-07 | 2021-01-05 | 罗根激光科技（武汉）有限公司 | Timed frequency doubling crystal automatic displacement system |
-
2019
- 2019-10-24 CN CN201911019418.6A patent/CN110783803A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112186488A (en) * | 2020-10-07 | 2021-01-05 | 罗根激光科技（武汉）有限公司 | Timed frequency doubling crystal automatic displacement system |
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Application publication date: 20200211 |
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| WD01 | Invention patent application deemed withdrawn after publication |