KR102280064B1 - Laser apparatus for skin treatment which is capable of amplifying laser pulses of various wavelengths - Google Patents

Abstract

The present invention includes a diode laser generator for generating diode laser pulses having at least two different wavelengths, and a plurality of different amplification media, of the diode laser pulse transmitted from the diode laser generator among the amplification media. and a laser amplifying unit configured to select the amplification medium corresponding to a wavelength to amplify the diode laser pulse, and a control unit configured to control the diode laser generating unit and the laser amplifying unit, wherein the laser amplifying unit comprises a plurality of amplification media. It provides a laser device for skin treatment that can adjust the position of the amplification medium so that the amplification medium in which the laser pulse transmitted from the diode laser can be amplified is disposed.
Therefore, by including a plurality of amplification media capable of position adjustment, it is possible to efficiently amplify laser pulses of various wavelengths.

Description

Laser apparatus for skin treatment capable of amplifying laser pulses of various wavelengths {Laser apparatus for skin treatment which is capable of amplifying laser pulses of various wavelengths}

The present invention relates to a laser device for skin treatment, and more particularly, to a laser device for skin treatment including a plurality of amplification media whose positions can be adjusted so as to amplify laser pulses of various wavelengths.

In recent years, research on the field using lasers in industry and research fields has been actively conducted. Recently, such lasers have been actively developed in research fields such as skin treatment, spectroscopy, nano-imaging, particle acceleration, and nuclear fusion, as well as in everyday life such as 3D printing, roughing, and telecommunication performances, and in industrial fields such as welding, cutting, and surface modification. is becoming

Such a laser is required to vary the wavelength of the laser according to the purpose of use. However, since the amplification medium can amplify only laser pulses of specific wavelengths, a plurality of amplification media are required to amplify laser pulses having various wavelengths. Therefore, since the existing laser device requires a large number of amplification media according to the supplied laser pulse, there is a problem in that the volume or size of the laser device increases.

Republic of Korea Patent No. 10-1898632

An object of the present invention is to provide a laser device for skin treatment including a plurality of amplification media capable of position control so as to amplify laser pulses of various wavelengths.

According to an aspect of the present invention, the present invention includes a diode laser generator generating diode laser pulses having at least two or more different wavelengths, and a plurality of different amplification media, wherein the diode laser generator among the amplification media A laser amplifying unit for amplifying the diode laser pulse by selecting the amplification medium corresponding to the wavelength of the diode laser pulse transmitted from The unit provides a laser device for skin treatment, which can adjust the position of the amplification medium so that an amplification medium capable of amplifying the laser pulse transmitted from the diode laser is disposed among the plurality of amplification mediums.

The laser device for skin treatment according to the present invention has the following effects.

First, by including a plurality of amplification media capable of position adjustment, it is possible to efficiently amplify laser pulses of various wavelengths.

Second, since the position of the amplification medium can be adjusted, a large number of amplification media can be included in a small volume, so the device has an advantage of small size.

Third, since it is possible to amplify laser pulses of various wavelengths, it is possible to output a pulse having a wavelength required for a skin treatment target. In particular, since the structure of the laser amplification unit is very simple, it is easy to amplify the pulse.

1 is a block diagram of a laser device for skin treatment according to an embodiment of the present invention.
FIG. 2 is a schematic diagram specifically showing a diode laser generating unit of the laser device for skin treatment according to FIG. 1 .
FIG. 3 is a schematic diagram specifically showing a laser amplification unit of the laser device for skin treatment according to FIG. 1 .
FIG. 4 is an embodiment of a first amplification module of the laser device for skin treatment according to FIG. 1 .
FIG. 5 is another embodiment of the first amplification module of the laser device for skin treatment according to FIG. 1 .
FIG. 6 is another embodiment of the first amplification module of the laser device for skin treatment according to FIG. 1 .
7 is a schematic diagram of a laser device for skin treatment according to another embodiment of the present invention.
8 is a schematic diagram of a laser device for skin treatment according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings.

1 to 3 , the laser device 100 for skin treatment according to an embodiment of the present invention includes a diode laser generating unit 110 , a laser amplifying unit 120 , and a control unit 130 . The laser generator 110 includes a first diode laser 111 , a second diode laser 112 , a third diode laser 113 , and a ninth mirror 114 . The laser generator 110 emits a seed laser. That is, the laser generating unit 110 is formed as a light source that generates a pulse that is a source of a laser that is amplified and output through the laser amplifying unit 120 . The laser pulses emitted from the diode lasers 111 , 112 , and 113 of the laser generator 110 are redirected by the ninth mirror 114 and are transferred to the laser amplifier 120 .

The first diode laser 111 , the second diode laser 112 , and the third diode laser 113 generate diode laser pulses having different wavelengths. In this embodiment, the laser generator 110 includes three individual diode lasers as an example, but the number of individual diode lasers included in the laser generator 110 can be changed. Each of the first diode laser 111 , the second diode laser 112 , and the third diode laser 113 generates a laser pulse through On/Off control. Of course, the method of generating the laser pulse may be changed.

The laser pulses respectively generated by the first diode laser 111 , the second diode laser 112 , and the third diode laser 113 are transmitted to the laser amplifier 120 through the same path. This is caused by the ninth mirror 114 that adjusts the path of the laser pulse generated by each of the first diode laser 111 , the second diode laser 112 , and the third diode laser 113 . That is, the ninth mirror 114 transmits the laser pulses generated by the first diode laser 111 , the second diode laser 112 , and the third diode laser 113 to the laser amplifier 120 in the same path. to be transmitted to At this time, the ninth mirror 114 is movable so as to change the path of the laser pulse generated by the first diode laser 111 , the second diode laser 112 and the third diode laser 113 , respectively. can The ninth mirror 114 is operated by a motor (not shown) connected to the ninth mirror 114 . The motor (not shown) operates the ninth mirror 114 in response to a signal from the controller 130 . In this embodiment, the ninth mirror 114 is one, and the path of the first diode laser 111, the second diode laser 112, and the third diode laser 113 is changed while moving as an example. , A plurality of the ninth mirrors 114 may be fixed and installed according to the number of the diode lasers. In addition, the laser pulses generated by each of the first diode laser 111 , the second diode laser 112 , and the third diode laser 113 are directly generated by the laser generator 120 without using the ninth mirror 114 . may be transmitted to

The laser amplification unit 120 includes a first beam splitter 123, a first amplification module 121a, a first mirror 122a, a first wave plate 124, a second mirror 122b, and a second amplification module. (121b), the third mirror 122c, the fourth mirror 122d, the third amplification module 121c, the fifth mirror 122e, the sixth mirror 122f, the fourth amplification module 121d, the seventh The mirror 122g, the eighth mirror 122h, the first lens 125a, the second lens 125b, the first pumping ramp 126a, the second pumping ramp 126b, and the second harmonic generator 127 ) is included. The first beam splitter 123 transmits the P-polarized light and reflects the S-polarized light. Therefore, since the laser pulse supplied from the laser generator 110 is a P wave, it passes through the first beam splitter 123 as it is. In addition, the first beam splitter 123 is disposed on the same axis as the traveling direction of the laser pulse supplied from the laser generator 110 . Of course, the arrangement of the first beam splitter 123 may be changed. Another role of the first beam splitter 123 will be described later.

Referring to FIG. 4 , the first amplification module 121a includes a base portion 1211a, a first amplification medium 1212a, and a second amplification medium 1213a. The first amplification module 121a serves to amplify the laser pulse supplied from the laser generator 110 while passing it single or multiple times. The first pumping lamp 126a illuminates the first amplifying module 121a to excite the ions in the first amplifying module 121a. The first pumping lamp 126a is disposed to be spaced apart from the first amplification module 121a.

The base portion 1211a is formed in a circular plate structure. The first amplification medium 1212a and the second amplification medium 1213a are disposed on the base portion 1211a. The base portion 1211a has a rotatable structure. The rotation axis of the base part 1211a is formed in a direction crossing the direction in which the laser pulse transmitted from the laser generator 110 travels. That is, when the laser pulse transmitted from the laser generating unit 110 is transmitted in the horizontal direction, the rotation axis of the base unit 1211a is formed in the vertical direction. In the present embodiment, the base portion 1211a has a circular plate structure as an example, but the structure of the base portion 1211a may be changed.

The first amplification medium 1212a and the second amplification medium 1213a are disposed on one surface of the base portion 1211a. The first amplification medium 1212a and the second amplification medium 1213a are formed in a rod structure. The first amplification medium 1212a is formed of Nd:YAG. And the second amplification medium 1213a is formed of Alexandrite. Of course, the types of the first amplification medium 1212a and the second amplification medium 1213a can be changed at will. The first amplification medium 1212a and the second amplification medium 1213a are disposed to be spaced apart.

In the present embodiment, the first amplification medium 1212a and the second amplification medium 1213a are disposed at positions symmetrical with respect to the center of the base portion 1211a. Specifically, when the first amplification medium 1212a is disposed at a position rotated by 90° counterclockwise from 0° of the x-axis in the horizontal direction, the second amplification medium 1213a is rotated at 0° of the x-axis. It is placed in a position rotated 270° counterclockwise. Of course, the arrangement of the first amplification medium 1212a and the second amplification medium 1213a can be changed as much as possible. Also, the types and shapes of the first amplification medium 1212a and the second amplification medium 1213a may be changed. In addition, when the base part 1211a rotates about the rotation axis, the laser pulse transmitted from the laser generator 110 is applied to any one of the first amplification medium 1212a and the second amplification medium 1213a. is brought in

Rotating the first amplification module 121a so that the laser pulse transmitted from the laser generator 110 is introduced is performed by a signal from the controller 130 . The control unit 130 rotates the first amplification module 121a according to the type of the laser pulse transmitted from the laser generator 110 to the first amplification medium 1212a or the second amplification medium 1213a. The laser pulse transmitted from the laser generator 110 is arranged on a path along which it travels. That is, at least one of the first amplification medium 1212a and the second amplification medium 1213a is disposed on the same axis as the first beam splitter 123 . Accordingly, the laser pulse passing through the first beam splitter 123 is first amplified while passing through the first amplifying medium 1212a or the second amplifying medium 1213a.

Referring to FIG. 5 , FIG. 5 shows another embodiment of the first amplification module 121a of FIG. 3 . Accordingly, the first amplification module 121a includes a base portion 1211a', a first amplification medium 1212a', and a second amplification medium 1213a'. The base portion 1211a ′ has a cylindrical shape, and a rotation axis penetrating the upper and lower surfaces of the cylinder is parallel to the direction in which the laser pulse transmitted from the laser generating unit 110 travels, and is rotatable. That is, the rotation axis of the base portion 1211a' is disposed in the left and right directions. The first amplifying medium 1212a' and the second amplifying medium 1213a' are disposed on the side surface of the base portion 1211a. The first amplifying medium 1212a' is formed of the same material as the first amplifying medium 1212a of FIG. 4, and the second amplifying medium 1213a' is the same as the second amplifying medium 1213a of FIG. formed of material. The first amplification medium 1212a' and the second amplification medium 1213a' are disposed on the side surface of the base portion 1211a to be spaced apart from each other. In the present embodiment, the first amplifying medium 1212a' and the second amplifying medium 1213a' are disposed 180° apart so as to be formed at a symmetrical upper and lower side of the side surface of the base part 1211a.

(a) is a view in which the first amplification medium 1212a ′ is disposed on a path of a laser pulse transmitted from the diode laser generator 110 . (b) is a view in which the first amplification module 121a is rotated 180° around the rotation axis of the base part 1211a' in the state of (a). In this case, the second amplification medium 1213a ′ is disposed on the path of the laser pulse transmitted from the diode laser generator 110 . The first amplification module 121a according to this embodiment has the first amplification medium 1212a ′ and the second amplification medium 1213a ′ as the base when compared with the first amplification module 121a according to FIG. 4 . When arranging in the portion 1211a', there is an advantage in that spatial interference is small, so that a plurality of amplification media can be arranged.

Referring to FIG. 6 , FIG. 6 shows another embodiment of the first amplification module 121a according to FIG. 3 . Accordingly, the first amplifying module 121a includes a base portion 1211a'', a first amplifying medium 1212a'', and a second amplifying medium 1213a''. The base portion 1211a'' can be raised and lowered. Elevating and lowering of the base portion 1211a ″ is controlled by the control unit 130 . The base portion 1211a'' has a cylindrical shape with a storage space formed therein. In addition, one side of the base portion 1211a'' and the other side opposite to the one side are opened. Accordingly, the first amplification medium 1212a'' is disposed on the base part 1211a'', and the second amplification medium 1213a'' is stored in the storage space inside the base part 1211a''. place it Therefore, the second amplification medium 1213a'' can maintain stability even when the base part 1122a'' is raised or lowered than when it is disposed on the outer side of the lower surface or the inner side of the upper surface of the base part 1213a''. . And the first amplification medium 1212a'' is formed of the same material as the first amplification medium 1212a according to FIG. 4, and the second amplification medium 1213'' is the second amplification medium according to FIG. 1213a) and formed of the same material.

(a) is a view in which the first amplification medium 1212a ″ is disposed on a path of a laser pulse transmitted from the diode laser generator 110 . (b) is a state in which the base part 1211a'' is raised in the state of (a). In this case, the second amplification medium 1213a ″ is disposed on the path of the laser pulse transmitted from the diode laser generator 110 . The first amplification module 121a according to this embodiment performs a vertical linear motion rather than a rotational motion of the base part 1211a'' when compared with the first amplification module 121a according to FIGS. 4 and 5. Since the positions of the first amplification medium 1212a'' and the second amplification medium 1213a'' are adjusted through this, the operation is simple.

The first mirror 122a is disposed on the same axis as the first beam splitter 123 . Also, the first mirror 122a is disposed on the same axis as one of the first amplification medium 1212a and the second amplification medium 1213a. Accordingly, it is a full-reflection mirror that reflects the first amplified laser pulse through the first amplifying medium 1212a or the second amplifying medium 1213a in the direction of the first amplifying module 121a. The first mirror 122a transmits the first amplified laser pulse while passing through the first amplifying medium 1212a or the second amplifying medium 1213a to the first amplifying medium 1212a or the second amplifying medium. (1213a) serves to send back to amplify once again.

At this time, a first wave plate 124 is disposed between the first amplification module 121a and the first mirror 122a. The first wave plate 124 is formed of a quarter wave plate (QWP) that changes the phase of the wave passing through the first wave plate 124 by 1/4 wavelength. That is, the first wave plate 122c passes through the first amplification medium 1212a or the second amplification medium 1213a and moves the phase of the laser pulse toward the first mirror 122a by 1/4 wavelength. The phase of the laser pulse reflected by the first mirror 122a and returned to the first amplification module 121a is changed to 1/4 wavelength again. Accordingly, the P wave supplied from the laser generator 110 is changed to an S wave while passing through the first wave plate 124 twice. This is to change the path of the laser pulse because it is reflected rather than transmitted when it goes back to the first beam splitter 123 .

The laser pulse, which passes through the first wave plate 124 twice and then returns to the first amplification module 121a, passes through the first amplification medium 1212a or the second amplification medium 1213a. second amplification. The path of the second amplified laser pulse is controlled by the first beam splitter 123 . That is, the second amplified laser pulse is reflected by the first beam splitter 123 and the path is changed by 90 degrees.

The second mirror 122b is formed above the first beam splitter 123 . Accordingly, the laser pulse reflected by the first beam splitter 123 is reflected by the second mirror 122b. The second mirror 122b is disposed so that the laser pulse supplied from the first beam splitter 123 is reflected in the direction of the second amplification module 121b.

The second amplification module 121b serves to thirdly amplify the laser pulse reflected from the second mirror 122b. The second amplifying module 121b is disposed to be spaced apart from the first amplifying module 121a. Ions in the second amplification module 121b may be excited by the first pumping lamp 126a. In this embodiment, the second amplification module 121b is formed in a structure similar to that of the first amplification module 121a. That is, the second amplification module 121b includes a base part (not shown), a third amplification medium (not shown), and a fourth amplification medium (not shown). The third amplification medium (not shown) is formed of the same material as the first amplification medium 1212a. The fourth amplifying medium (not shown) is formed of the same material as the second amplifying medium 1213a. However, in the present invention, the material, structure and shape of the second amplifying module 121b can be changed as much as possible.

And the second amplification module 121b is disposed above the first amplification module 121a. In addition, the second amplification module 121b is disposed on the same axis as the second mirror 122b. That is, the second amplifying module 121b may be disposed below the first amplifying module 121a according to the arrangement position of the second mirror 122b.

The third mirror 122c is disposed to face the second mirror 122b with the second amplification module 121b interposed therebetween. In addition, the third mirror 122c reflects the third amplified laser pulse while passing through the second amplifying module 121b to adjust the path. That is, the third mirror 122c reflects the laser pulse passing through the second amplification module 121b to change the path by 90 degrees. Of course, the reflection angle of the laser pulse reflected from the third mirror 122c can be changed. The third mirror 122c is also disposed on the same axis as the second mirror 122b and the second amplification module 121b.

The fourth mirror 122d reflects the laser pulse supplied from the third mirror 122c in the direction of the third amplification module 121c. In this case, the laser pulse traveling path from the third mirror 122c to the fourth mirror 122d may further include lens units 125a and 125b for adjusting the spatial size of the laser pulse. The lens units 125a and 125b may include a first lens 125a and a second lens 125b. The lens units 125a and 125b adjust the distance between the first lens 125a and the second lens 125b to direct a laser pulse from the third mirror 122c to the fourth mirror 122d direction. Adjust the space size of

The third amplification module 121c serves to fourth amplify the laser pulse reflected from the fourth mirror 122b. The third amplification module 121c is disposed to be spaced apart from the fourth amplification module 121d. Ions in the third amplification module 121c may be excited by the second pumping lamp 126b. In this embodiment, the third amplification module 121c is formed in a structure similar to that of the first amplification module 121a. That is, the third amplification module 121c includes a base part (not shown), a fifth amplification medium (not shown), and a sixth amplification medium (not shown). The fifth amplification medium (not shown) is formed of the same material as the first amplification medium 1212a. The sixth amplifying medium (not shown) is formed of the same material as the second amplifying medium 1213a. However, the present invention is not limited thereto, and the material, structure, and shape of the third amplifying module 121c may be freely changed.

The fifth mirror 122e is disposed to face the fourth mirror 125b with the third amplification module 121c interposed therebetween. The fifth mirror 122e reflects the fourth amplified laser pulse while passing through the third amplifying module 121c to adjust the path. That is, the fifth mirror 122e reflects the laser pulse passing through the third amplification module 121c to change the path by 90 degrees. Of course, the reflection angle of the laser pulse reflected from the fifth mirror 122e can be changed. The fifth mirror 122e is disposed on the same axis as the fourth mirror 122d and the third amplification module 121c.

The sixth mirror 122f reflects the laser pulse supplied from the fifth mirror 122e in the direction of the fourth amplification module 121d. In the present embodiment, the sixth mirror 122f is formed separately from the fifth mirror 122e, but the fifth mirror 122e and the sixth mirror 122f may be formed as a single mirror. .

The fourth amplification module 121d serves to amplify the laser pulse reflected from the sixth mirror 122f for a fifth time. The fourth amplification module 121d is disposed to be spaced apart from the third amplification module 121c. Ions in the fourth amplification module 121d may be excited by the second pumping lamp 126b. In the present embodiment, the fourth amplification module 121d has a structure similar to that of the first amplification module 121a. That is, the fourth amplification module 121d includes a base part (not shown), a seventh amplification medium (not shown), and an eighth amplification medium (not shown). The seventh amplification medium (not shown) is formed of the same material as the first amplification medium 1212a. The eighth amplification medium (not shown) is formed of the same material as the second amplification medium 1213a. However, the present invention is not limited thereto, and the material, structure, and shape of the fourth amplifying module 121c may be freely changed.

The seventh mirror 122g is disposed to face the sixth mirror 122f with the fourth amplification module 121d interposed therebetween. The seventh mirror 122g reflects the laser pulse passing through the fourth amplification module 121d to adjust the path in the direction of the eighth mirror 122h.

The eighth mirror 122h is disposed on one side of the seventh mirror 122g, and controls the path of the laser pulse supplied from the seventh mirror 122g. The laser pulse whose path is adjusted by the eighth mirror 122h is output to the laser amplification unit 120 . However, the present invention is not limited thereto, and a laser pulse may be directly output from the seventh mirror 122g to the laser amplification unit 120 .

The secondary harmonic generator (SHG) 127 changes the wavelength of the laser pulse output from the seventh mirror 122g or the eighth mirror 122h. The second harmonic generator 127 is disposed in a path along which the laser pulse output from the seventh mirror 122g or the eighth mirror 122h travels. The second harmonic generator 127 changes the wavelength of the laser pulse output from the eighth mirror 122h similarly to a known wavelength change method.

The control unit 130 serves to control the diode laser generating unit 110 and the laser amplifying unit 120 . That is, the controller 130 controls the operations of the first diode laser 111 , the second diode laser 112 , and the third diode laser 113 to generate laser pulses of different wavelengths. In addition, the controller 130 adjusts the intensity and wavelength of a diode laser pulse generated by applying a signal to the laser amplifier 120 . In this case, the control unit 130 may vary the pulse width using a dedicated driver (not shown) of the diode laser included in the laser generating unit 110 . In the case of the dedicated driver of the diode laser 111, a driver for short pulses of ps or a driver for controlling pulses of ms or longer may be selected and used.

In addition, the control unit 130 applies a signal to the first pumping lamp 126a and the second pumping lamp 126b of the laser amplification unit 120 to the first amplification module 121a and the second amplification module 121b. ), the state of the amplification medium included in the third amplification module 121c and the fourth amplification module 121d may be adjusted. In addition, when the laser pulse output from the laser amplifying unit 120 does not have a required energy level, the controller 130 may control the laser pulse generated by transmitting a signal to the laser generating unit 110 .

The laser device 100 for skin treatment according to the present embodiment allows the laser pulses of various wavelengths transmitted from the laser generator 110 to be easily amplified using a rotatable amplification module, thereby providing a small volume laser for skin treatment. It has the advantage of allowing the fabrication of devices. In addition, there is an advantage of improving work efficiency by enabling amplification of laser pulses having a range of wavelengths for skin treatment in one device.

In FIG. 3 , each of the first pumping ramp 126a and the second pumping ramp 126b is arranged one by one, but the present invention is not limited thereto. The first pumping ramp 126a and the second pumping ramp 126b each have a structure including two ramps, so that each ramp of the first pumping ramp 126a includes the first amplification module 121a and The second amplification module 121b may be irradiated with light, and each lamp of the second pumping lamp 126b may irradiate light to the third amplification module 121c and the fourth amplification module 121d. there is. In this case, there is an effect that the control of the laser amplification unit 120 becomes easy.

Referring to FIG. 7 , the laser device 200 for skin treatment according to another embodiment of the present invention includes a laser generator 210 , a laser amplifier 220 , and a controller 230 . In the laser device 200 for skin treatment according to the present embodiment, the diode laser generating unit 210 and the control unit 230 are similar to the laser device 100 for skin treatment according to FIG. 3 , and thus a description thereof will be omitted.

The laser amplification unit 220 includes a first beam splitter 223a, a first amplifier module 221a, a first mirror 222a, a first wave plate 224a, a second mirror 222b, and a second wave plate. 224b, the second amplification module 221b, the first pumping lamp 226, the third mirror 222c, the second beam splitter 223b, the third wave plate 224c, the first lens 225a, It includes a second lens 225b and a fourth mirror 222d. Although not shown in the drawing, a second harmonic generator (not shown) as shown in FIG. 3 may be further included. The first beam splitter 223a transmits the P-polarized light and reflects the S-polarized light. Therefore, since the laser pulse supplied from the diode laser generator 210 is a P wave as in the diode laser generator 110 of FIG. 3 , it passes through the first beam splitter 223a as it is. In addition, the first beam splitter 223a is disposed on the same axis as the traveling direction of the laser pulse supplied from the diode laser generator 210 . Of course, the arrangement of the first beam splitter 223a may be changed.

The first amplification module 221a serves to amplify the laser pulse supplied from the laser generator 210 . In the first amplification module 221a, the first pumping lamp 226 illuminates the first amplification module 221a to excite ions in the first amplification module 221a. The first pumping ramp 226a is disposed to be spaced apart from the first amplification module 221a. The first amplification module 221a has a material, arrangement, and shape similar to those of the first amplification module 221a shown in FIG. 4 . However, the present invention is not limited thereto, and the material, arrangement, and shape of the first amplification module 221a may be freely changed.

In addition, the first amplifying module 221a is disposed on the same axis as the first beam splitter 223a. Accordingly, the laser pulse passing through the first beam splitter 223a is first amplified while passing through the first amplifying module 221a.

The first mirror 222a is disposed on the same axis as the first beam splitter 223a and the first amplifier module 221a. Also, the first mirror 222a is disposed to face the first beam splitter 223a with the first amplification module 221a interposed therebetween. And it is a full reflection mirror that reflects the first amplified laser pulse passing through the first amplification module (221a) in the direction of the first amplification module (221a). The first mirror 222a serves to return the first amplified laser pulse while passing through the first amplifying module 221a to be amplified once again by the first amplifying module 121a.

At this time, a first wave plate 224a is disposed between the first amplification module 221a and the first mirror 222a. The first wave plate 124 is formed of a quarter wave plate (QWP) that changes the phase of the wave passing through the first wave plate 224a by 1/4 wavelength. And after passing through the first amplification module 221a, the laser pulse passing through the first wave plate 224a and directed to the first mirror 222a and reflected by the first mirror 222a, the first The laser pulse directed to the wave plate 224a is circularly polarized and proceeds. That is, the first wave plate 224a changes the phase of the laser pulse directed to the first mirror 222a through the first amplification module 221a by 1/4 wavelength, and the first mirror 222a ) and the phase of the laser pulse that is reflected back to the first amplification module 221a is changed to 1/4 wavelength again. Accordingly, the P wave supplied from the laser generator 210 is changed to an S wave while passing through the first wave plate 224a twice. This is to change the path of the laser pulse because it is reflected rather than transmitted when it returns to the first beam splitter 223a.

The laser pulse, which passes through the first wave plate 224a twice and then returns to the first amplification module 221a, is second amplified while passing through the first amplification module 221a. The path of the second amplified laser pulse is controlled by the first beam splitter 223a. That is, the second amplified laser pulse is reflected by the first beam splitter 223a and the path is changed by 90 degrees.

The second mirror 222b is disposed on one side of which the path of the first beam splitter 223a is changed by 90 degrees. Accordingly, the laser pulse reflected by the first beam splitter 223a is reflected by the second mirror 222b. The second mirror 222b is disposed so that the laser pulse supplied from the first beam splitter 223a is reflected in the direction of the second amplification module 221b.

The second wave plate 224b changes the phase of the laser pulse reflected from the second mirror 222b and directed toward the second amplification medium 221b. At this time, the second wave plate 224b is formed of a half wave plate (HWP) unlike the first wave plate 224a. That is, the laser pulse supplied to the second wave plate 224b is an S wave, and the phase of the laser pulse passing through the second wave plate 224b is changed by 1/2 wavelength to become a P wave. This allows the laser pulse reflected from the second mirror 224b to pass through the second beam splitter 223b disposed to face the second mirror 224b with the second wave plate 224b interposed therebetween. it is for

The second beam splitter 223b is disposed between the second wave plate 224b and the second amplification module 221b. Since the laser pulse passing through the second wave plate 224b is a P wave, the second beam splitter 223b transmits the laser pulse without reflection.

The first lens 225a and the second lens 225b are disposed between the second beam splitter 223b and the second wave plate 224b. The first lens 225a and the second lens 225b adjust the spatial magnitude of the laser pulse reflected from the second mirror 222b.

The second amplification module 221b serves to thirdly amplify the laser pulse supplied through the second beam splitter 223b. The second amplification module 221b has a material and structure similar to that of the first amplification module 121a of FIG. 4 . The first pumping lamp 226 illuminates the second amplifying module 221b to excite the ions in the second amplifying module 221b. The first pumping lamp 226 is disposed to be spaced apart from the second amplification module 221b. However, the present invention is not limited thereto, and the material, structure, and shape of the second amplifying module 221b may be freely changed.

The third mirror 222c serves to reflect the third equalized laser pulse while passing through the second amplifying module 221b to return to the direction of the second amplifying module 221b. At this time, a third wave plate 224c is disposed between the third mirror 222c and the second amplification module 221b. The third wave plate 224c is formed as a quarter wave plate like the first wave plate 224a. Accordingly, as the laser pulse proceeds from the second amplification module 221b to the third mirror 222c, the 1/4 wavelength phase is changed, and from the third mirror 222c to the second amplification module 221b Upon returning, the laser pulse is changed in 1/4 wavelength phase. And after passing through the second amplification module 221b, the laser pulse passing through the third wave plate 224c and directed to the third mirror 222c and being reflected by the third mirror 222c, the third The laser pulse directed to the wave plate 224c is circularly polarized and proceeds. That is, the waveform of the laser pulse returning to the second amplification module 221b is changed from a P-wave to an S-wave.

The second beam splitter 223b reflects the laser pulse reflected from the third mirror 222c and passed through the second amplifying module 221b to be amplified for a fourth time to adjust the path. The laser pulse whose path is adjusted by being reflected from the second beam splitter 223b is reflected by the fourth mirror 222d disposed on one side of the second beam splitter 223b and is output.

The device 200 according to this embodiment has the advantage of having a simpler structure than the device 100 according to FIG. 1 , although the number of amplification times is 4 times less than that of the device 100 according to FIG. 3 . In addition, since there are four amplification times, it is possible to amplify the low energy laser pulse generated by the laser generator 210 into a laser pulse having a sufficiently large energy.

Referring to FIG. 8 , the laser device 300 for skin treatment according to another embodiment of the present invention includes a laser generating unit 310 , a laser amplifying unit 320 , and a control unit 330 . Although not shown in the drawings, the laser generator 310 may include a diode laser (not shown) and a wavelength tunable unit (not shown). Since the laser generator 310 and the controller 330 are similar to the laser device 100 for skin treatment according to FIG. 3 , a description thereof will be omitted.

The laser amplifier 320 includes a first beam splitter 323a, a first amplifier module 321a, a first mirror 322a, a second mirror 322b, a first lens 325a, and a second lens 325b. ), a second amplification module 321b, a first pumping lamp 326, a second beam splitter 323b, a first wave plate 324, a third mirror 322c, and a fourth mirror 322d. . Although not shown in the drawing, a second harmonic generator (not shown) as shown in FIG. 3 may be further included. The first beam splitter 323a transmits the P-polarized light and reflects the S-polarized light. Therefore, since the laser pulse supplied from the laser generator 310 is a P wave as in the laser generator 310 according to FIG. 1 , it passes through the first beam splitter 323a as it is. In addition, the first beam splitter 323a is disposed on the same axis as the traveling direction of the laser pulse supplied from the laser generator 310 . Of course, the arrangement of the first beam splitter 323a may be changed.

The first amplification module 321a serves to amplify the laser pulse supplied from the laser generator 310 . The first amplification module 321a is formed of a material and structure similar to that of the first amplification module 121a of FIG. 4 . The first pumping lamp 326 illuminates the first amplifying module 321a to excite the ions in the first amplifying module 321a. The first pumping lamp 326 is disposed to be spaced apart from the first amplification module 321a. However, the present invention is not limited thereto, and the material, structure, and shape of the first amplifying module 321a may be freely changed.

In addition, the first amplifying module 321a is disposed on the same axis as the first beam splitter 323a. Accordingly, the laser pulse passing through the first beam splitter 323a is first amplified while passing through the first amplifying module 321a.

The first mirror 322a is disposed to face the first beam splitter 323a with the first amplification medium 321a interposed therebetween. The first mirror 322a changes the path by reflecting the laser pulse that has passed through the first amplification module 321a.

The second mirror 322b reflects the laser pulse whose path has been changed by the first mirror 322a to change the path again. The second mirror 322b is disposed on one side of the first mirror 322a.

The second amplification module 321b serves to second amplify the laser pulse reflected from the second mirror 322b. The second amplification module 321b is formed of a material and structure similar to that of the first amplification module 121a shown in FIG. 4 . The second amplifying module 321b is disposed to be spaced apart from the first amplifying module 321a. The first pumping lamp 326 illuminates the second amplifying module 321b to excite the ions in the second amplifying module 321b. The first pumping lamp 326 is disposed to be spaced apart from the second amplification module 321b. However, the present invention is not limited thereto, and the material, structure, and shape of the first amplifying medium 321b may be freely changed.

And the second amplification module 321b is disposed on the same axis as the second mirror 322b. Accordingly, the laser pulse reflected from the second mirror 322b is second amplified while passing through the second amplification module 321b.

The first lens 325a and the second lens 325b are disposed between the second mirror 322b and the second amplification module 321b. The first lens 325a and the second lens 325b adjust the spatial magnitude of the laser pulse reflected from the second mirror 322b.

The second beam splitter 323b is disposed to face the second mirror 322b with the second amplification module 321b interposed therebetween. The second beam splitter 323b transmits the second amplified laser pulse because it is a P wave.

The third mirror 322c reflects the laser pulse passing through the second beam splitter 323b to change the path. The third mirror 322c is disposed to face the second amplification medium 321b with the second beam splitter 323b interposed therebetween.

The first wave plate 324 is disposed between the second beam splitter 323b and the third mirror 322c. The first wave plate 324 is formed of a half wave plate. Accordingly, the waveform of the laser pulse passing through the first wave plate 324 is changed from a P-wave to an S-wave.

The third mirror 322c is disposed to face the second beam splitter 323b with the first wave plate 324 interposed therebetween. Also, the third mirror 322c is disposed on one side of the first beam splitter 323a. The laser pulse whose path is changed by being reflected by the third mirror 322c is reflected back to the first beam splitter 323a. The laser pulse reflected from the first beam splitter 323a is directed to the first amplification module 321a.

The laser pulse, which is third amplified while passing through the first amplification module 321a, is reflected by the first mirror 322a and changes its path. The laser pulse whose path has been changed by being reflected by the first mirror 322a is reflected by the second mirror 322b and the path is changed and is directed to the second amplification module 321b.

The laser pulse, which is fourth amplified while passing through the second amplification module 321b, is reflected by the second beam splitter 323b to change the path. Since the waveform is changed to an S-wave while passing through the first wave plate 324 , the laser pulse does not pass through the second beam splitter 323b and is reflected to change the path.

The fourth mirror 322d is disposed on one side of the second beam splitter 323b. The fourth mirror 322d changes the path of the laser pulse reflected from the second beam splitter 323b and outputs it.

The device 300 according to the present embodiment has a simple structure and good amplification efficiency because the number of amplification times is the same as 4 times compared to the device 200 according to FIG. 4 , but the number of wave plates is smaller than that of the device 200 according to FIG. 4 . There are advantages.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is merely exemplary, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100, 200, 300,: laser device for skin treatment
110, 210, 310: laser generating unit
111: first diode laser
112: second diode laser
113: third diode laser
114: ninth mirror
120, 220, 320: laser amplification unit
121a, 221a, 321a: first amplification module
1211a, 1211a', 1211a'': base part
1212a, 1212a', 1212a'': first amplification medium
1213a, 1213a', 1213a'': second amplification medium
121b, 221b, 321b: second amplification module
121c: third amplification module
121d: fourth amplification module
122a, 222a, 322a: first mirror
122b, 222b, 322b: second mirror
122c, 222c, 322c: third mirror
122d, 222d, 322d: 4th mirror
122e: 5th mirror
122f: 6th mirror
122g: 7th mirror
122h: 8th mirror
123a, 223a, 323a: first beam splitter
223b, 323b: second beam splitter
124a, 224a, 324a: first wave plate
224b: second wave plate
224c: third wave plate
125a, 225a, 325a: first lens
125b, 225b, 325b: second lens
126a, 226, 326: first pumping ramp
126b: second pumping ramp
127: second harmonic wave generator
130, 230, 330: control unit

Claims (11)

a diode laser generator generating diode laser pulses having at least two different wavelengths;
a laser amplifying unit including a plurality of different amplification media and selecting the amplification medium corresponding to the wavelength of the diode laser pulse transmitted from the diode laser generating unit from among the amplifying medium to amplify the diode laser pulse; and
A control unit for controlling the diode laser generating unit and the laser amplifying unit,
The laser amplification unit,
The position of the amplification medium may be adjusted so that an amplification medium in which the laser pulse transmitted from the diode laser can be amplified is disposed among the plurality of amplification mediums,
The laser amplification unit,
Selectively moving a position of a corresponding amplification medium in the amplification medium to a position to which the diode laser pulse transmitted from the diode laser generator moves,
The laser amplification unit,
The rotation axis is arranged to cross the direction in which the laser pulse transmitted from the laser generator proceeds, and further comprising a rotatable base portion of a plate structure,
The amplification medium is arranged so as to be in contact with the same surface of the base part through which the rotation shaft passes, and arranged to be spaced apart,
When the base unit rotates about the rotation axis, the amplification medium disposed on the base unit also rotates about the rotation axis, and the laser transmitted from the laser generator to any one of the amplification medium. arranged to receive a pulse,
Laser device for skin treatment. a diode laser generator generating diode laser pulses having at least two different wavelengths;
a laser amplifying unit including a plurality of different amplification media and selecting the amplification medium corresponding to the wavelength of the diode laser pulse transmitted from the diode laser generating unit from among the amplifying medium to amplify the diode laser pulse; and
A control unit for controlling the diode laser generating unit and the laser amplifying unit,
The laser amplification unit,
The position of the amplification medium may be adjusted so that an amplification medium in which the laser pulse transmitted from the diode laser can be amplified is disposed among the plurality of amplification mediums,
The laser amplification unit,
Selectively moving a position of a corresponding amplification medium in the amplification medium to a position to which the diode laser pulse transmitted from the diode laser generator moves,
The laser amplification unit,
The rotating shaft is arranged to be parallel to the direction in which the laser pulse transmitted from the laser generating unit proceeds, and further comprising a rotatable cylindrical base,
The amplification medium is disposed on the side of the base part, and is arranged in a symmetrical structure with respect to the center of the base part so as to be spaced apart along the circumferential direction of the rotation axis,
When the base part rotates about the rotation axis, the amplification medium disposed on the side surface of the base unit also rotates about the rotation axis, and the laser transmitted from the laser generator to any one of the amplification medium. arranged to receive a pulse,
Laser device for skin treatment. a diode laser generator generating diode laser pulses having at least two different wavelengths;
a laser amplifying unit including a plurality of different amplification media and selecting the amplification medium corresponding to the wavelength of the diode laser pulse transmitted from the diode laser generating unit from among the amplifying medium to amplify the diode laser pulse; and
A control unit for controlling the diode laser generating unit and the laser amplifying unit,
The laser amplification unit,
The position of the amplification medium may be adjusted so that an amplification medium in which the laser pulse transmitted from the diode laser can be amplified is disposed among the plurality of amplification mediums,
The laser amplification unit,
Selectively moving a position of a corresponding amplification medium in the amplification medium to a position to which the diode laser pulse transmitted from the diode laser generator moves,
The laser amplification unit,
It further includes a base part capable of lifting and lowering through a linear motion in an up-down direction crossing the direction in which the laser pulse transmitted from the laser generating part proceeds, and having a storage space formed therein,
The amplification medium includes a first amplification medium disposed in contact with an upper portion of the base portion and a second amplification medium disposed in contact with the storage space, wherein the first amplification medium and the second amplification medium include the base portion. The ascending and descending are arranged to be spaced apart in the vertical direction,
When the base unit is raised and lowered, the laser pulse transmitted from the laser generating unit is introduced into any one of the amplification media.
Laser device for skin treatment. delete delete 4. The method according to any one of claims 1 to 3,
The laser amplification unit,
a first amplification module for first amplifying the pulses supplied from the laser generator;
a first mirror disposed such that a pulse, which is first amplified while passing through the first amplifier module, is reflected and returned to the direction of the first amplifier module;
a first beam splitter disposed to face the first mirror with the first amplification module interposed therebetween, and configured to adjust the path of the second amplified pulse by returning to and passing through the first amplifying module;
a first wave plate disposed between the first mirror and the first beam splitter to change the polarization or phase of a passing pulse;
a second mirror for sending a pulse whose path is adjusted by the first beam splitter in the direction of a second amplification module;
the second amplifying module arranged to be spaced apart from the first amplifying module and third amplifying the pulses supplied from the second mirror;
a first pumping lamp disposed to be spaced apart from the first amplifying module and the second amplifying module and illuminating the first amplifying module and the second amplifying module;
a third mirror disposed to face the second mirror with the second amplifying module interposed therebetween and configured to reflect a third amplified pulse while passing through the second amplifying module to adjust a path;
a fourth mirror for sending a pulse whose path is adjusted in the third mirror in the direction of a third amplification module;
a third amplification module for fourth amplifying the pulses supplied from the fourth mirror;
a fifth mirror disposed to face the fourth mirror with the third amplification module interposed therebetween and configured to adjust a path by reflecting a fourth amplified pulse while passing through the third amplifying module;
a sixth mirror for sending a pulse whose path is adjusted in the fifth mirror toward a fourth amplification module;
the fourth amplifying module for fifth amplifying the pulses supplied from the sixth mirror;
a second pumping lamp disposed to be spaced apart from the third amplifying module and the fourth amplifying module and illuminating the third amplifying module and the fourth amplifying module; and
and a seventh mirror disposed to face the sixth mirror with the fourth amplifying module interposed therebetween, and adjusting a path by reflecting the pulse passing through the fourth amplifying module,
The pulse supplied from the laser generator passes through the first beam splitter and is directed in the direction of the first amplification module,
Laser device for skin treatment. 7. The method of claim 6,
It is disposed between the third mirror and the fourth mirror, further comprising a lens unit for adjusting the magnitude of the pulse of the pulse reflected from the third mirror,
Laser device for skin treatment. 4. The method according to any one of claims 1 to 3,
The laser amplification unit,
a first amplification module for first amplifying the pulses supplied from the laser generator;
a first mirror disposed so that a pulse, which is first amplified while passing through the first amplifier module, is reflected and returned to the first amplifier module;
a first beam splitter disposed to face the first mirror with the first amplification module interposed therebetween and configured to control the path of the second amplified pulse by returning to and passing through the first amplifying module;
a first wave plate disposed between the first mirror and the first beam splitter to change the polarization or phase of a passing pulse;
a second mirror for sending a pulse whose path has been adjusted by the first beam splitter in the direction of a second amplification module;
the second amplifying module arranged to be spaced apart from the first amplifying module and third amplifying the pulse supplied from the second mirror;
a first pumping lamp disposed to be spaced apart from the first amplifying module and the second amplifying module and illuminating the first and second amplifying modules with light;
a third mirror disposed to reflect a third amplified pulse while passing through the second amplifying module and return to the direction of the second amplifying module;
a second beam splitter disposed to face the third mirror with the second amplification module interposed therebetween and configured to control the path of the pulse to be fourth amplified by returning to and passing through the second amplification module;
a third wave plate disposed between the third mirror and the second beam splitter to change the polarization or phase of the passing pulse; and
The pulse reflected from the second mirror is supplied to the second amplification module through the second beam splitter, is disposed between the second mirror and the second beam splitter, and is reflected by the second mirror to the second beam A second wave plate for changing the polarization or phase of the pulse directed to the splitter,
The pulse supplied from the laser generator passes through the first beam splitter and is directed toward the first amplification module,
Laser device for skin treatment. 9. The method of claim 8,
It is disposed between the second beam splitter and the second wave plate, further comprising a lens unit for adjusting the magnitude of a pulse whose polarization or phase is changed in the second wave plate,
Laser device for skin treatment. 4. The method according to any one of claims 1 to 3,
The laser amplification unit,
a first amplification module for first amplifying the pulses supplied from the laser generator;
a first mirror for controlling the path of the first amplified pulse while passing through the first amplifying module;
a second mirror for sending a pulse whose path is adjusted in the first mirror toward a second amplification module;
a second amplifying module disposed to be spaced apart from the first amplifying module and configured to second amplify the pulses supplied from the second mirror;
a first pumping lamp disposed to be spaced apart from the first amplifying module and the second amplifying module and illuminating the first amplifying module and the second amplifying module;
a second beam splitter passing the second amplified pulse in the second amplifying module;
a third that is disposed to face the second amplification module with the second beam splitter interposed therebetween, is second amplified while passing through the second amplification module, and reflects the pulse passing through the second beam splitter to adjust the path mirror;
a first wave plate disposed between the third mirror and the second beam splitter to change the polarization or phase of a pulse passing through the second beam splitter and directed to the third mirror;
a first beam splitter disposed to face the first mirror with the first amplification module interposed therebetween and configured to adjust a path by reflecting a pulse whose path has been adjusted in the third mirror;
The pulse whose path is adjusted in the first beam splitter passes through a first amplification module and is amplified for a third time, and the third amplified pulse is directed in the direction of the second mirror by adjusting the path in the first mirror, A pulse whose path is adjusted in the second mirror is directed in the direction of the second amplification module, and a fourth amplified pulse passing through the second amplifying module is transmitted with a path adjusted by the second beam splitter,
The pulse supplied from the laser generator passes through the first beam splitter and is directed in the direction of the first amplification module,
Laser device for skin treatment. 11. The method of claim 10,
It is disposed between the second mirror and the second beam splitter, and further comprising a lens unit for adjusting the magnitude of the pulse whose path is adjusted in the second mirror,
Laser device for skin treatment.

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