CN106169691B - Three-stage amplification picosecond laser for removing freckles - Google Patents
Three-stage amplification picosecond laser for removing freckles Download PDFInfo
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- CN106169691B CN106169691B CN201610840853.5A CN201610840853A CN106169691B CN 106169691 B CN106169691 B CN 106169691B CN 201610840853 A CN201610840853 A CN 201610840853A CN 106169691 B CN106169691 B CN 106169691B
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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
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
- H01S3/1003—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors tunable optical elements, e.g. acousto-optic filters, tunable gratings
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/067—Radiation therapy using light using laser light
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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
- H01S3/04—Arrangements for thermal management
- H01S3/0407—Liquid cooling, e.g. by water
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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
- H01S3/0915—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light
- H01S3/092—Processes or apparatus for excitation, e.g. pumping using optical pumping by incoherent light of flash lamp
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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
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
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Abstract
The invention discloses a three-stage amplification picosecond laser for removing freckles, which comprises a sheet metal frame and a laser power supply, wherein a water tank is arranged at the lower layer of the sheet metal frame, a filter tank is arranged on the water tank, a water pump is arranged on the side surface of the water tank, the laser power supply is arranged at the upper layer of the sheet metal frame, a laser is arranged above the laser power supply, and a heat dissipation frame is arranged on the side surface of the laser. Has the advantages that: through three-stage amplification, the output picosecond laser pulse width is short, the peak function is high, the time of acting on the skin is short, the contact range with the skin is small, and shattered melanin is easy to be discharged out of the body through skin lymph.
Description
Technical Field
The invention relates to the field of beauty equipment, in particular to a three-stage amplification picosecond laser for removing freckles.
Background
In recent years, the appearance, development and successful application of novel lasers enable the development of cosmetology medicine to enter a brand-new stage, and a powerful treatment means is provided for cosmetology and freckle removal. The therapeutic action of laser on human skin tissue is mainly based on the selective photothermal action principle, that is, when the wavelength of incident laser is matched with the inherent absorption peak of target chromophore and the irradiation time is shorter than the thermal relaxation time of target chromophore, the target chromophore can be selectively destroyed without damaging surrounding normal tissues or causing only slight damage, thereby achieving the effect of non-invasive treatment. At present, lasers with various wavelengths are developed on the market according to the application, and the usable wavelengths range from ultraviolet to infrared to form a more perfect series of products. However, the pulse width is limited by the development of laser technology, short pulse picosecond laser just rises, most of devices mainly adopt traditional Q-switch nanosecond pulse laser and continuous laser, only a few picosecond laser freckle removing devices are foreign products, the single pulse energy and the power density are low, the time for acting on skin during treatment is long, the contact range with the skin is large, and melanin is not favorably discharged, so that a three-stage amplification picosecond laser for removing freckles is needed to solve the problems.
Disclosure of Invention
The present invention is directed to solving the above problems by providing a three-stage amplified picosecond laser for removing speckle.
The invention realizes the purpose through the following technical scheme:
the utility model provides a tertiary amplification picosecond laser instrument for removing beverage, includes panel beating frame and laser power supply, the water tank is installed to the lower floor of panel beating frame, install above the water tank and cross the filter tank, the water tank side-mounting has the water pump, install on the upper strata of panel beating frame laser power supply, the laser instrument is installed to laser power supply's top, the side of laser instrument is provided with the radiator.
In order to further improve the using effect of the three-stage amplification picosecond laser, the water pump is connected with the water inlet of the radiator through a hose, and the water outlet of the radiator is connected with the filter tank through a hose.
In order to further improve the using effect of the three-level amplification picosecond laser, the laser power supply is connected with the laser through a lead, and the radiator is fixed on the sheet metal rack through a bolt.
In order to further improve the using effect of the three-level amplification picosecond laser, a first lamp pumping module and a diaphragm are arranged inside the laser, a first full-reflection mirror is arranged on one side of the first lamp pumping module, the diaphragm is arranged on the other side of the first lamp pumping module, a saturable absorption mirror is arranged on one side of the diaphragm, an output mirror is arranged on one side of the saturable absorption mirror, a first reflecting mirror is arranged on one side of the output mirror, a first polaroid is arranged in front of the first reflecting mirror, a first Faraday rotator is arranged on one side of the first polaroid, a second polaroid is arranged on one side of the second polaroid, a first wave plate is arranged on one side of the first wave plate, a first beam expander is arranged on one side of the first beam expander, a second reflecting mirror is arranged in front of the second reflecting mirror, and a third polaroid is arranged on one side of the third reflecting mirror, a second lamp pumping module is arranged on one side of the third polarizer, a second Faraday rotator is arranged on one side of the second lamp pumping module, a second total reflecting mirror is arranged on one side of the second Faraday rotator, a third lamp pumping module is arranged on the side surface of the second total reflecting mirror, a fourth Faraday rotator is arranged on one side of the third lamp pumping module, a third total reflecting mirror is arranged on one side of the fourth Faraday rotator, a fourth polarizer is arranged on the other side of the third lamp pumping module, a fourth reflecting mirror is arranged on one side of the fourth polarizer, a second beam expander is arranged on one side of the fourth reflecting mirror, a second wave plate is arranged on one side of the second wave plate, a third Faraday rotator is arranged on one side of the fourth polarizer, a fifth Faraday rotator is arranged on one side of the third wave plate, and a third beam expander is arranged on the other side of the third wave plate, and a lamp pumping module IV is arranged on one side of the beam expander III.
In order to further improve the use effect of the three-level amplification picosecond laser, the first lamp pumping module, the second lamp pumping module, the third lamp pumping module and the fourth lamp pumping module are all xenon lamp pumps, and the working substances are as follows: YLF, the diameter of the crystal rod of the first lamp pumping module is 2mm, the length of the crystal rod is 60mm, the two ends of the first lamp pumping module and the second lamp pumping module are respectively plated with a 1064nm antireflection film, low-repetition-frequency laser with the wavelength of 1064nm can be generated, the diameter of the crystal rod of the second lamp pumping module is 4mm, the length of the crystal rod of the second lamp pumping module is 60mm, and the sizes of the crystal rods of the third lamp pumping module and the fourth lamp pumping module are respectively 6mm multiplied by 60mm and 9mm multiplied by 60 mm.
In order to further improve the using effect of the three-level amplification picosecond laser, the first total reflection mirror is a plane mirror coated with a dielectric film with a high reflection to 1064nm, the output mirror is a planoconvex mirror, the radius of curvature of a concave surface is 200mm, the transmittance is 20%, and the saturable absorber mirror adopts GaAs as a saturable absorber.
In order to further improve the using effect of the three-level amplification picosecond laser, the first Faraday rotator, the second Faraday rotator, the third Faraday rotator, the fourth Faraday rotator and the fifth Faraday rotator are both 45 degrees, 1064nm antireflection films are plated at two ends of each Faraday rotator, the first beam expander, the second beam expander and the third beam expander are both formed by two lenses, the two lenses are both plated with the 1064nm antireflection films, the beam expansion factor of the first beam expander is 2, and the beam expansion factors of the second beam expander and the third beam expander are 1.5.
Has the advantages that: through three-stage amplification, the output picosecond laser pulse width is short, the peak function is high, the time of acting on the skin is short, the contact range with the skin is small, and shattered melanin is easy to be discharged out of the body through skin lymph.
Drawings
FIG. 1 is an exploded view of a three-level amplified picosecond laser for removing speckle according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of a three-stage amplified picosecond laser for removing speckle according to the present invention;
fig. 3 is a working schematic diagram of a laser of a three-stage amplified picosecond laser for removing freckles according to the invention.
The reference numerals are explained below:
1. a sheet metal frame;
2. a laser; 201. a first total reflection mirror; 202. a first lamp pumping module; 203. a diaphragm; 204. a saturable absorber mirror; 205. an output mirror; 206. a first reflecting mirror; 207. a polarizing film I; 208. a Faraday rotator I; 209. a second polarizing film; 210. a first wave plate; 211. a first beam expander; 212. a second reflecting mirror; 213. a third reflector; 214. a polarizing plate III; 215. a lamp pumping module II; 216. a Faraday rotator II; 217. a second total reflection mirror; 218. a Faraday rotator III; 219. a second wave plate; 220. a second beam expander; 221. a fourth reflecting mirror; 222. a polarizing plate IV; 223. a lamp pumping module III; 224. a Faraday rotator IV; 225. a third total reflection mirror; 226. a Faraday rotator V; 227. a third wave plate; 228. a third beam expander; 229. a lamp pumping module IV;
3. a laser power supply; 4. a heat sink; 5. a water tank; 6. a filter tank; 7. and (4) a water pump.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-3, a tertiary enlarged picosecond laser instrument that enlarges for dispelling freckle, including panel beating frame 1 and laser power source 3, water tank 5 is installed to the lower floor of panel beating frame 1, install filter tank 6 above the water tank 5, 5 side-mounting of water tank have water pump 7, install on the upper strata of panel beating frame 1 laser power source 3, laser instrument 2 is installed to laser power source 3's top, the side of laser instrument 2 is provided with radiator 4.
In this embodiment, the water pump 7 pass through the hose with the water inlet of radiator 4 is connected, the delivery port of radiator 4 pass through the hose with it connects to filter jar 6, the water warp in the water tank 5 the water pump 7 gets into radiator 4, it is right laser instrument 2 with laser power supply 3 dispels the heat, and the water after the heat dissipation flows back to filter jar 6, by filter jar 6 filters the impurity that produces in the water course, make the water after the filtration flow back to water tank 5 realizes water cycle.
In this embodiment, laser power supply 3 with laser instrument 2 passes through the wire and connects, laser power supply 3 is used for laser instrument 2 provides the electric energy, laser instrument 2 is used for launching the laser beam, destroys the target look base, realizes cosmetic freckle removing, radiator 4 passes through the bolt fastening on panel beating frame 1, radiator 4 is used for laser instrument 2 with laser power supply 3 dispels the heat.
In this embodiment, a first lamp pumping module 202 and a diaphragm 203 are installed inside the laser 2, a first total reflection mirror 201 is installed on one side of the first lamp pumping module 202, the diaphragm 203 is installed on the other side of the first lamp pumping module 202, the diaphragm 203 is used for mode selection, a saturable absorber mirror 204 is installed on one side of the diaphragm 203, an output mirror 205 is installed on one side of the saturable absorber mirror 204, the first total reflection mirror 201, the first lamp pumping module 202, the diaphragm 203, the saturable absorber mirror 204 and the output mirror 205 jointly form a seed source, picosecond seed light is provided, beam quality and pulse width are controlled, lamp pumping picosecond seed light with repetition frequency of 10Hz, pulse width of less than 700pS, 200mJ, spot diameter of 2mm and vertical polarization is output from the output mirror 205, a first reflector 206 is installed on one side of the output mirror 205, the first reflector 206 is used for reflecting the generated picosecond seed light, the front side of the first reflecting mirror 206 is provided with a first polarizing plate 207, the first polarizing plate 207 is used for analyzing, one side of the first polarizing plate 207 is provided with a first Faraday rotator 208, the first Faraday rotator 208 is used for rotating polarized light by 45 degrees to enable the polarized light to become circularly polarized light, one side of the first Faraday rotator 208 is provided with a second polarizing plate 209, one side of the second polarizing plate 209 is provided with a first wave plate 210, the first wave plate 210 is used for converting the circularly polarized light into linearly polarized light with horizontal polarization, one side of the first wave plate 210 is provided with a first beam expander 211, the first beam expander 211 is used for expanding laser beams, so that light beams output by a front stage are well coupled to a lower stage amplifier, the quality of light beams output by the front stage is improved, the divergence angle of the light beams is reduced, one side of the first beam expander 211 is provided with a second reflecting mirror 212, and, the second reflecting mirror 212 and the third reflecting mirror 213 are used for reflecting light beams and adjusting the transmission angle of the light beams, a third polarizing plate 214 is arranged on one side of the third reflecting mirror 213, the third polarizing plate 214 is used for allowing horizontally polarized light to pass through and reflecting vertically polarized light, a second lamp pumping module 215 is arranged on one side of the third polarizing plate 214, a second faraday rotator 216 is arranged on one side of the second lamp pumping module 215, a second total reflecting mirror 217 is arranged on one side of the second faraday rotator 216, the horizontally polarized light is incident on the second total reflecting mirror 217 through the second lamp pumping module 215 and the second faraday rotator 216 and is reflected back by the second total reflecting mirror 217, the power and energy of the laser light are amplified and then become vertically polarized light through the second lamp pumping module 215 and the second faraday rotator 216 twice, and the third lamp pumping module 223 is arranged on the side surface of the second total reflecting mirror 217, one side of the lamp pumping module three 223 is provided with a faraday rotator four 224, one side of the faraday rotator four 224 is provided with a total reflection mirror three 225, the other side of the lamp pumping module three 223 is provided with a polarizing plate four 222, one side of the polarizing plate four 222 is provided with a reflecting mirror four 221, one side of the reflecting mirror four 221 is provided with a beam expander two 220, one side of the beam expander two 220 is provided with a wave plate two 219, one side of the wave plate two 219 is provided with a faraday rotator three 218, the side of the polarizing plate four 222 is provided with a wave plate three 227, one side of the wave plate three 227 is provided with a faraday rotator five 226, the other side of the wave plate three 227 is provided with a beam expander three 228, one side of the beam expander three 228 is provided with a lamp pumping module four 229, the amplified vertically polarized light is reflected by the polarizing plate three 214, and the polarization direction is changed again through the faraday rotator three 218 and the wave plate two 219, in the power amplification process, the beam quality is reduced to a certain extent, the divergence angle is reduced through the second beam expander 220, the beam quality is improved, the size of a light spot can be ensured to be matched with the diameter of a working substance of a next-stage amplifier, the expanded laser enters a second-stage amplification system through the fourth reflector 221, the second-stage amplification system is the same as the first-stage amplification system, the laser beam passes through the fourth polarizer 222, the third lamp pumping module 223, the third Faraday rotator 224 and the third reflector 213 to jointly complete second-stage amplification, and the laser beam passes through the fifth Faraday rotator 226, the third wave plate 227 and the third beam expander 228 after being reflected by the fourth polarizer 222, enters a third-stage amplification gain medium, namely the fourth lamp pumping module 229, and is directly output from the tail end of the gain medium.
In this embodiment, the first lamp pump module 202, the second lamp pump module 215, the third lamp pump module 223 and the fourth lamp pump module 229 are all xenon lamp pumps, and the working substances are: YLF, the diameter of the crystal rod of the first lamp pump module 202 is 2mm, the length of the crystal rod is 60mm, two ends of the first lamp pump module 202 and the second lamp pump module 215 are respectively plated with a 1064nm antireflection film, low-repetition-frequency laser with the wavelength of 1064nm can be generated, the diameter of the crystal rod of the second lamp pump module 215 is 4mm, the length of the crystal rod of the second lamp pump module is 60mm, and the sizes of the crystal rods of the third lamp pump module 223 and the fourth lamp pump module 229 are respectively 6mm multiplied by 60mm and 9mm multiplied by 60 mm.
In this embodiment, the first all-reflection mirror 201 is a flat mirror coated with a dielectric film with high reflectivity to 1064nm, the output mirror 205 is a plano-concave mirror, the radius of curvature of the concave surface is 200mm, the transmittance is 20%, and the saturable absorber mirror 204 adopts GaAs as a saturable absorber.
In this embodiment, the rotation angles of the first faraday rotator 208, the second faraday rotator 216, the third faraday rotator 218, the fourth faraday rotator 224 and the fifth faraday rotator 226 are all 45 degrees, two ends of each faraday rotator are coated with 1064nm antireflection films, the first beam expander 211, the second beam expander 220 and the third beam expander 228 are all composed of two lenses, each lens is coated with a 1064nm antireflection film, the beam expansion factor of the first beam expander 211 is 2, and the beam expansion factor of the second beam expander 220 and the third beam expander 228 is 1.5.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a tertiary amplification picosecond laser instrument for removing beverage, includes panel beating frame and laser power supply, the water tank is installed to the lower floor of panel beating frame, install above the water tank and cross the filter tank, the water tank side-mounting has the water pump, install the upper strata of panel beating frame laser power supply, the laser instrument is installed to laser power supply's top, the side of laser instrument is provided with radiator, its characterized in that: the laser comprises a laser device and is characterized in that a first lamp pumping module and a diaphragm are installed in the laser device, a first total reflection mirror is arranged on one side of the first lamp pumping module, the diaphragm is arranged on the other side of the first lamp pumping module, a saturable absorption mirror is arranged on one side of the diaphragm, an output mirror is arranged on one side of the saturable absorption mirror, a first reflecting mirror is arranged on one side of the output mirror, a first polaroid is arranged in front of the first reflecting mirror, a first Faraday rotator is arranged on one side of the first polaroid, a second polaroid is arranged on one side of the second polaroid, a first wave plate is arranged on one side of the first wave plate, a second reflecting mirror is arranged on one side of the first beam expander, a third reflecting mirror is arranged in front of the second reflecting mirror, a third polaroid is arranged on one side of the third reflecting mirror, and a second lamp pumping module is arranged on one, a second Faraday rotator is arranged on one side of the second lamp pumping module, a second total reflecting mirror is arranged on one side of the second Faraday rotator, a third lamp pumping module is arranged on the side surface of the second total reflecting mirror, a fourth Faraday rotator is arranged on one side of the third lamp pumping module, a third total reflecting mirror is arranged on one side of the fourth Faraday rotator, a fourth polaroid is arranged on the other side of the third lamp pumping module, a fourth reflector is arranged on one side of the fourth polaroid, a second beam expander is arranged on one side of the fourth reflector, a second wave plate is arranged on one side of the second wave plate, a third Faraday rotator is arranged on one side of the third wave plate, a third wave plate is arranged on the side surface of the fourth polaroid, a fifth Faraday rotator is arranged on one side of the third wave plate, a third beam expander is arranged on the other side of the third wave plate, and a fourth lamp pumping module is arranged on one side of the third beam expander, the amplified vertical polarized light is reflected by the third polaroid, the polarization direction is changed again through the third Faraday rotator and the second wave plate, the divergence angle is reduced through the second beam expander, the expanded laser enters a secondary amplification system through the fourth reflector, the fourth polaroid, the third lamp pumping module, the third Faraday rotator and the third total reflector complete secondary amplification together, and the amplified vertical polarized light is reflected by the fourth polaroid, sequentially passes through the fifth Faraday rotator, the third wave plate and the third beam expander, enters a third-level amplification gain medium, enters the lamp pumping module for four times, and is directly output from the tail end of the gain medium.
2. The three-stage amplified picosecond laser for removing speckle according to claim 1, wherein: the water pump is connected with the water inlet of the radiator through a hose, and the water outlet of the radiator is connected with the filter tank through a hose.
3. The three-stage amplified picosecond laser for removing speckle according to claim 1, wherein: the laser power supply is connected with the laser through a wire, and the radiator is fixed on the sheet metal rack through a bolt.
4. The three-stage amplified picosecond laser for removing speckle according to claim 1, wherein: the first lamp pumping module, the second lamp pumping module, the third lamp pumping module and the fourth lamp pumping module are all xenon lamp pumping, and the working substances are as follows: YLF, the diameter of the crystal rod of the first lamp pumping module is 2mm, the length of the crystal rod is 60mm, the two ends of the first lamp pumping module and the second lamp pumping module are respectively plated with a 1064nm antireflection film, low-repetition-frequency laser with the wavelength of 1064nm can be generated, the diameter of the crystal rod of the second lamp pumping module is 4mm, the length of the crystal rod of the second lamp pumping module is 60mm, and the sizes of the crystal rods of the third lamp pumping module and the fourth lamp pumping module are respectively 6mm multiplied by 60mm and 9mm multiplied by 60 mm.
5. The three-stage amplified picosecond laser for removing speckle according to claim 1, wherein: the first total reflection mirror is a plane mirror coated with a dielectric film with high reflection at 1064nm, the output mirror is a plano-concave mirror, the radius of curvature of the concave surface is 200mm, the transmittance is 20%, and the saturable absorber mirror adopts GaAs as a saturable absorber.
6. The three-stage amplified picosecond laser for removing speckle according to claim 1, wherein: faraday rotator one Faraday rotator two Faraday rotator three Faraday rotator four and Faraday rotator five's angle of rotation is 45 degrees, and 1064nm antireflection coating has been plated at both ends, beam expander one beam expander two with beam expander three constitutes by two lens, and two lens have all been plated 1064nm antireflection coating, beam expanding multiple of beam expander one is 2, beam expander two with beam expanding multiple of beam expander three is 1.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610840853.5A CN106169691B (en) | 2016-09-22 | 2016-09-22 | Three-stage amplification picosecond laser for removing freckles |
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| CN201610840853.5A CN106169691B (en) | 2016-09-22 | 2016-09-22 | Three-stage amplification picosecond laser for removing freckles |
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| CN106169691B true CN106169691B (en) | 2021-06-04 |
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| CN113036590B (en) * | 2019-12-23 | 2022-12-09 | 上海禾赛科技有限公司 | Laser, laser radar including the same, and scanning method of the laser radar |
| CN115021062B (en) * | 2022-08-09 | 2022-12-20 | 北京国光领航科技有限公司 | Laser device for multi-pulse width multi-mode output and laser therapeutic instrument |
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| EP0609978A1 (en) * | 1993-02-04 | 1994-08-10 | Intelligent Surgical Lasers, Inc. | Variable repetition rate picosecond laser |
| CN1251426A (en) * | 1998-08-19 | 2000-04-26 | 富士通株式会社 | Optical device used as optical isolater, and optical amplifier and system including said optical device |
| CN202060873U (en) * | 2011-04-28 | 2011-12-07 | 合肥广安科技开发有限责任公司 | Structure of whole laser machine |
| CN102354902A (en) * | 2011-11-07 | 2012-02-15 | 华南师范大学 | Kilowatt-level high power pulse Nd:YAG (neodymium-neodymium aluminum garnet) laser with one-level resonance and two-level amplification |
| CN202620500U (en) * | 2012-06-04 | 2012-12-26 | 广州瑞恺迪光电科技有限公司 | Laser speckle removing instrument |
| CN206059894U (en) * | 2016-09-22 | 2017-03-29 | 广州桦洋电子科技有限公司 | A kind of three-level for speckle dispelling amplifies picosecond laser |
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| CN106169691A (en) | 2016-11-30 |
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