KR20150005790A - Laser generating device - Google Patents

Laser generating device Download PDF

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Publication number
KR20150005790A
KR20150005790A KR20130078703A KR20130078703A KR20150005790A KR 20150005790 A KR20150005790 A KR 20150005790A KR 20130078703 A KR20130078703 A KR 20130078703A KR 20130078703 A KR20130078703 A KR 20130078703A KR 20150005790 A KR20150005790 A KR 20150005790A
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KR
South Korea
Prior art keywords
laser
unit
output
laser medium
medium
Prior art date
Application number
KR20130078703A
Other languages
Korean (ko)
Inventor
김종원
김정현
서영석
문준영
Original Assignee
원텍 주식회사
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Publication date
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Priority to KR20130078703A priority Critical patent/KR20150005790A/en
Publication of KR20150005790A publication Critical patent/KR20150005790A/en

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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
    • 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
    • H01S3/10038—Amplitude control
    • H01S3/10046—Pulse repetition rate control
    • 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
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/026—Monolithically integrated components, e.g. waveguides, monitoring photo-detectors, drivers
    • H01S5/0262—Photo-diodes, e.g. transceiver devices, bidirectional devices
    • H01S5/0264—Photo-diodes, e.g. transceiver devices, bidirectional devices for monitoring the laser-output

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Lasers (AREA)

Abstract

The present invention relates to a laser generating device capable of uniformizing the intensity distribution of laser emitted to an emission surface and emitting the laser with a high output. The laser generating device according to the present invention includes: an oscillation unit which outputs laser by including a first laser medium, a first pumping lamp which pumps excitation energy to the first laser medium, a total reflector and an output reflector which are arranged on one end and the other end of the first laser medium, and a Q-switching device which is arranged between the first laser medium and the total reflector; an amplification unit which is arranged in parallel to the oscillation unit and amplifies and outputs the laser outputted from the oscillation unit; and a guide unit which is formed with a dove-prism and guides the laser outputted from the oscillation unit to the amplification unit.

Description

LASER GENERATING DEVICE

The present invention relates to a laser generating apparatus, and more particularly, to a laser generating apparatus capable of emitting a laser with a high output power while uniformizing the intensity distribution of the laser irradiated on the irradiation surface.

Laser (LASER) is a special light that is made artificially, not natural light, and its use range is spreading rapidly throughout the industrial field.

FIG. 1 shows a conventional laser generating apparatus. The conventional laser generating apparatus 10 includes a laser medium 12, a front reflector 14 provided on one side of the laser medium 12, An output mirror 16 positioned on the opposite side and a pumping lamp 18 for supplying energy to the laser medium 12. [

When the energy is applied to the laser medium 12 from the pumping lamp 18, the conventional laser generating apparatus 10 configured as described above causes induction emission of light in the laser medium 12, And is amplified while being repeatedly reflected between the output mirror 14 and the output mirror 16. A part of the amplified light is output to the laser 20 through the output mirror 16.

Meanwhile, as shown in FIG. 2A or FIG. 2B, the energy of the output laser is high and the energy is distributed low at the center. However, when a laser having such energy intensity is used for skin treatment, side effects such as petechiae hemorrhage appear due to the energy difference between the center and the edge of the laser. As a result, not only the pigment can be made darker, Therefore, there has been a problem that the laser must be partially overlapped and irradiated during the procedure.

Recently, various methods have been proposed to solve such problems. That is, methods for uniformly distributing the energy intensity distribution at the center and the edge of the laser (top-hat structure) are proposed to improve the treatment efficiency.

As a typical example thereof, there are a method using a diffractive optical element (DOE) and a method using a microlens array. These methods have a problem in that additional cost is required because they need to additionally include a diffractive optical element and a microlens array Further, there was another problem that the laser generating apparatus was enlarged.

An object of the present invention is to provide a laser generator capable of raising the peak output of a laser using a queue switching element and amplifying the laser on the path of the output laser so as to obtain a high output laser.

Further, the present invention provides a laser generating apparatus which makes uniform the intensity distribution of a laser beam without using any additional components by using a microarray mirror as a reflector.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems.

According to an aspect of the present invention, there is provided a laser generating apparatus including: an oscillation unit outputting a laser; An amplifying unit arranged to be in parallel with the oscillating unit and amplifying the laser output from the oscillating unit and outputting the amplified laser; And a guide portion formed of a dope prism for guiding the laser output from the oscillation portion to the amplification portion, and the total reflection mirror of the oscillation portion can be provided as a micro array mirror capable of uniformizing the intensity distribution of the output laser.

A first laser medium, a first pumping lamp for pumping excitation energy to the first laser medium, a front reflector and an output mirror disposed at one end and the other end of the first laser medium, and an output mirror disposed between the first laser medium and the reflector An oscillation unit comprising a cue switching element and outputting a laser; An amplifying unit arranged to be in parallel with the oscillating unit and amplifying the laser output from the oscillating unit and outputting the amplified laser; And a guide portion formed of a dope prism for guiding the laser output from the oscillation portion to the amplification portion.

Specifically, the amplifying unit includes: a second laser medium for amplifying the laser output from the oscillating unit; And a second pumping lamp that pumps excitation energy to the second laser medium.

And the second laser medium and the second pumping lamp, and the first laser medium and the first pumping lamp may be disposed in one cavity resonator.

Preferably, the second laser medium and the second pumping lamp, and the first laser medium and the first pumping lamp may be disposed in respective cavity resonators.

The guide portion may be disposed from the output end of the oscillation portion to the amplification portion so as to guide the laser output from the oscillation portion to the second laser medium side.

As described above, the laser generating apparatus according to the present invention has an advantage that the laser output from the oscillating unit is output by the cue switching device, and the laser output is amplified by the amplifying unit, so that the laser can be emitted with high output .

Further, the laser generating apparatus according to the present invention has an advantage that the intensity distribution of the output laser can be made uniform by using the microarray mirror as the full reflecting mirror of the oscillating portion.

1 is a schematic view of a conventional laser generator,
FIGS. 2A and 2B are diagrams showing energy intensity distributions of laser beams output from a conventional laser generator,
FIG. 3 is a schematic view of a laser generating apparatus according to the present invention, and FIG.
4 is a diagram showing the energy intensity distribution of the laser output from the laser generator according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference symbols whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

FIG. 3 is a schematic view of a laser generating apparatus according to the present invention. The laser generating apparatus 100 according to the present invention includes an oscillator 110 for outputting a laser beam, a laser generator 110 for amplifying the laser beam output from the oscillator 110, An amplification unit 130 and a guide unit 140 for guiding the laser output from the oscillation unit 110 to the amplification unit 130.

First, the oscillating unit 110 includes a first laser medium 112, a first pumping lamp 114 that pumps excitation energy to the first laser medium 112, and a second pumping lamp 114 that excites the first laser medium 112 A total reflection mirror 116 disposed on one end side, and an output mirror 118 disposed on the other end side of the first laser medium 112.

The oscillation unit 110 is provided between the one end of the first laser medium 112 and the front reflector 116 to shorten the pulse width of the laser and to increase the intensity of the laser, 120 may be further included.

Here, the functions of the components constituting the oscillation unit 110, the connection relationship of the components, and the operation of the components are well known, and thus a detailed description thereof will be omitted.

In the present invention, the front reflector 116, which is a component of the oscillating unit 110, is applied as a micro array mirror. The front reflector 116, which is composed of a micro array mirror, Thereby making the intensity distribution of the laser uniform.

Preferably, the microarray mirror structure may be provided in various structures such as a hexagon, a square, and a triangle.

In the oscillation unit 110, the amplification unit 130 and the guide unit 140 are disposed.

The amplification unit 130 includes a second laser medium 132 for amplifying the laser output from the oscillation unit 110 and a second pumping lamp 134 for pumping excitation energy to the second laser medium 132.

The second pumping ramps 134 are disposed parallel to the longitudinal direction of the second laser medium 132. And the second pumping lamp 134 is spaced apart from the outer circumferential surface of the second laser medium 132 by a predetermined distance. This second pumping ram 134 is connected to power supply means (not shown) that supplies power to pump the excitation energy to the second laser medium 132.

Preferably, the second pumping lamp 134 may be a laser diode, an arc lamp, or a flash lamp.

As the second laser medium 132, not only Nd: YAG but all solid media such as Nd: Glass or ruby can be used. The second laser medium 132 generates induced excitation by the excitation energy pumped from the second pumping ram 134 and amplifies the laser guided from the oscillation unit 110 by the guide unit 140. That is, the laser output from the oscillation unit 110 is amplified by the laser of high energy while being combined with the laser generated by the amplification unit 130.

1, the amplification unit 130 is disposed in parallel with the oscillation unit 110. At this time, the second laser medium 132 and the second pumping lamp 134 of the amplification unit 130, The first laser medium 112 and the first pumping lamp 114 of the oscillation unit 110 may be disposed in a cavity resonator or may be disposed in a cavity resonator of the amplification unit 130, 2 pumping ramp 134 and the first laser medium 112 and the first pumping ram 114 of the oscillating portion 110 may be disposed in respective cavity resonators.

The guide unit 140 is disposed from the output end of the oscillation unit 110 to the amplification unit 130 so that the laser output from the oscillation unit 110 can be guided to the amplification unit 130. That is, the guide unit 140 guides the laser output from the oscillation unit 110 to the second laser medium 132 side of the amplification unit 130.

Preferably, a usual dove prism is used as the guide portion 140. [

Since the laser output from the oscillation unit 110 is output by the cue switching device 120 and the laser output from the oscillation unit 110 is amplified by the amplification unit 130, Lt; / RTI >

Further, the laser generating apparatus 100 according to the present invention can uniformize the intensity distribution of the output laser by using the microarray mirror as the total reflecting mirror 116 of the oscillating unit 110.

The laser generation apparatus 100 is not limited to the configuration and operation of the embodiments described above. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

100: laser generator 110: oscillator
112: first laser medium 114: first pumping lamp
116: front reflector 118: output mirror
120: a queue switching element 130:
132: second laser medium 134: second pumping lamp
140:

Claims (5)

An oscillation unit outputting a laser;
An amplifying unit arranged to be in parallel with the oscillating unit and amplifying the laser output from the oscillating unit and outputting the amplified laser; And
And a guide portion formed of a dope prism for guiding the laser output from the oscillation portion to the amplification portion,
Wherein the total reflection mirror of the oscillation unit is provided as a micro array mirror capable of uniformizing the intensity distribution of the laser to be outputted.
The method according to claim 1,
Wherein,
A second laser medium for amplifying the laser output from the oscillation unit; And
And a second pumping lamp for pumping excitation energy to the second laser medium.
The method of claim 2,
Wherein the second laser medium and the second pumping lamp, and the first laser medium and the first pumping lamp are disposed in one cavity resonator.
The method of claim 2,
Wherein the second laser medium and the second pumping lamp, and the first laser medium and the first pumping lamp are disposed in respective cavity resonators.
The method of claim 2,
The guide portion
Wherein the laser generator is arranged to extend from an output end of the oscillation unit to the amplification unit so as to guide the laser output from the oscillation unit toward the second laser medium side.
KR20130078703A 2013-07-05 2013-07-05 Laser generating device KR20150005790A (en)

Priority Applications (1)

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KR20130078703A KR20150005790A (en) 2013-07-05 2013-07-05 Laser generating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20130078703A KR20150005790A (en) 2013-07-05 2013-07-05 Laser generating device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016167604A1 (en) * 2015-04-17 2016-10-20 주식회사 제이시스메디칼 Q switch nd:yag laser-generating device and generating method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016167604A1 (en) * 2015-04-17 2016-10-20 주식회사 제이시스메디칼 Q switch nd:yag laser-generating device and generating method thereof

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