WO2019074166A1 - Dispositif de génération laser - Google Patents

Dispositif de génération laser Download PDF

Info

Publication number
WO2019074166A1
WO2019074166A1 PCT/KR2018/001422 KR2018001422W WO2019074166A1 WO 2019074166 A1 WO2019074166 A1 WO 2019074166A1 KR 2018001422 W KR2018001422 W KR 2018001422W WO 2019074166 A1 WO2019074166 A1 WO 2019074166A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser
switching element
pulse
optical switching
resonator
Prior art date
Application number
PCT/KR2018/001422
Other languages
English (en)
Korean (ko)
Inventor
김정현
유한영
Original Assignee
원텍주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 원텍주식회사 filed Critical 원텍주식회사
Publication of WO2019074166A1 publication Critical patent/WO2019074166A1/fr

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A61B18/203—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser applying laser energy to the outside of the body
    • 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
    • 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
    • A61N5/0613—Apparatus adapted for a specific treatment
    • A61N5/0616—Skin treatment other than tanning
    • 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
    • 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
    • H01S3/1123—Q-switching
    • H01S3/115—Q-switching using intracavity electro-optic devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452—Skin

Definitions

  • the present invention relates to a Q-switching technique for storing internal energy and then releasing the energy in a strong pulse form at a time to increase the peak power, and for generating a picosecond laser pulse having a high peak output Technology.
  • the present invention relates to a nanosecond pulsed laser and a high-power picosecond pulsed laser in the medical treatment field, which enables fine treatment without damaging surrounding tissues.
  • high-power picosecond pulse lasers can transmit short pulses within a thermal relaxation time to tissues, so laser-induced pigment lesions require high power because of their relatively low water absorption rate to dye
  • the high power picosecond pulsed laser means that laser energy is generated by implementing a pulse duration of several tens to several hundreds picoseconds and a peak output per a high pulse.
  • the method of oscillating the laser in a short pulse shape is largely divided into two methods.
  • Q-switching method and mode-locking method are Several methods have been developed to implement these schemes. There are active amplitude or frequency modulation methods in the resonator, manual modulation methods using saturable absorbers, and synchronous gain modulation methods. These methods are used for Q-switching, sometimes mode locking, depending on the purpose. In general, the Q-switching scheme is advantageous for obtaining high energy per pulse, and the mode locking scheme is advantageous for obtaining a high peak output of a short pulse. So the development history of pico-second laser pulses is consistent with the development of this mode locking method.
  • the active system has a complicated overall system such as an electronic circuit configuration for stabilizing the output, and has difficulty in stable mode locking oscillation for a long time.
  • the passive type uses a saturated absorber, which makes it difficult to control the mode locking.
  • mode-locking technology In order to implement a pulse in the picosecond range, mode-locking technology has been used in the past, but the output power of the technique is tens of mJ. The output of mJ is required.
  • a picosecond pulse generation technique that produces an output of several hundreds of mJ requires at least two or three pulse generation techniques.
  • Such as active control switching technology combining Q-switching and mode locking, Q-switching, cavity dumping or pulse slicing, and stimulated Brillouin scattering (SBS) Using manual control compression techniques, pulses in the high power picosecond range can be generated.
  • Prior arts relating to the above-mentioned picosecond pulse laser device are known from Japanese Patent Application Nos. 10-2015-0115349 and 10-2007-0133032.
  • the first optical switching element 105 and the second optical switching element 102 are positioned in the resonator in order to generate optical pulses having hundreds of picoseconds or nano second class pulses and the first optical switching element 105 Switching trigger pulse is applied to the second optical switching element 102 before a first laser Q-switching optical pulse is generated by the optical switching action of the first optical switching element 105 after a lapse of a predetermined time Switching trigger pulse is applied to the first optical switching element 102 and a second Q switching optical pulse generated by the first optical switching element 105 is generated after a predetermined time elapses, When the pulse of the second Q-switching signal is applied by the pico-second pulse time, optical amplification is caused in the resonator, and after a predetermined time, the pulse is applied to the second optical switching element again to extract the high-
  • the Nano second pulse laser and the Pico second pulse laser are integrated into a single resonator to be a simple and compact device. If necessary, the Nano second pulse laser and the Pico second pulse laser can be generated.
  • pigment lesions have a relatively low absorption rate with respect to water, and thus require a high output.
  • the picosecond pulsed laser can efficiently break down or collapse pigment particles, so that it has excellent therapeutic effect on pigment lesions such as tattoo removal and stain.
  • FIG. 1 is a schematic view of a high power picosecond pulse laser generating apparatus according to the present invention.
  • FIG. 2 is a diagram illustrating a flow of a cue switch driving signal of the high-power picosecond pulse laser of the present invention.
  • FIG. 3 is a schematic diagram of a conventional nanosecond pulse laser generator.
  • Fig. 4 is a graph showing the waveforms of the conventional nanosecond-
  • FIG. 5 is a time chart illustrating a combination of a nanosecond pulse laser and a picosecond pulse laser.
  • FIG. 1 is a schematic diagram of a picosecond pulse laser generating apparatus according to the present invention.
  • a laser gain medium 103 When a laser gain medium 103 is pumped as a pumping light source, the laser oscillates after a predetermined time elapses.
  • the oscillated laser places the first optical switching element 105 and the second optical switching element 102 inside the resonator in order to generate optical pulses with hundreds of picoseconds or sub-nanosecond pulses, Switching pulses are applied to the first optical switching element 105, and after a certain time elapses, by the optical switching action of the first optical switching element 105, before the first laser Q-switching optical pulse is generated, Switching trigger pulse is applied to the optical switching element 102 and a first Q-switching optical pulse generated by the first optical switching element 105 is generated after a lapse of a predetermined time, 102 is applied as a pulse of the second Q-switching signal, the self-injected optical amplification is caused in the
  • FIG. 2 is a diagram of a queue switch driving signal flow according to the present invention.
  • a pulse of several nanoseconds to tens of nanoseconds having a high peak output after a certain time (Laser Build up Time) .
  • Switching trigger pulse is applied to the optical switching element to generate a light pulse having a pulse of several hundred picoseconds or sub-nanoseconds (T1), and after a certain time (?
  • T1 a laser Q- A second Q-switching Trigger pulse is applied (T2) before the appearance of the Q-switching pulse, and a time Q (t2) corresponding to the picosecond pulse time to be extracted to the optical switching element at a time point (T3)
  • T3 a time point
  • the resonator amplifies the self-injection light, and after a certain time ( ⁇ t3), the pulse is again applied to the optical switching element to extract the picosecond pulse.
  • FIG. 3 is a schematic diagram for generating a first laser Q-switching optical pulse by the optical switching action of the first optical switching element 105, and a Q-switching pulse is generated after the Q-trigger signal as shown in FIG.
  • the first optical switching element 105 and the second optical switching element 102 described above are used for electro-optical Q-switching and act as if they are shutters.
  • the electro-optical Q- Is turned off, the laser beam is passed through, and when the power is on, electro-optical Q-switching is performed.
  • Nano second pulse laser is generated, and the power of the first optical switching element 105 and when the power of the second optical switching element 102 is on, a pulse laser of Pico seconds is generated.
  • the Nano second pulse laser and the Pico second pulse laser are integrated by a single resonator, and only the optical switching element is added, so that a simple and compact Nano second pulse laser and a Pico second pulse laser are generated.
  • Nano second pulse laser and Pico second pulse laser can be generated.
  • one or two optical switching elements of the resonator can be used and can be changed according to the Q-switching sequence design.
  • the Pico second pulse laser is successively irradiated as shown in FIG. 5 (a) As shown in b), the Pico pulsed laser and the Nano pulsed laser can be crossed and irradiated while being combined in various modes.
  • the duration of the Nano second pulse is typically less than 40 nano-second and the duration of the Pico second pulse is less than 900 pico-second.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Biophysics (AREA)
  • Lasers (AREA)

Abstract

La présente invention, afin de générer des impulsions laser nanosecondes et des impulsions laser picosecondes de forte puissance, génère des impulsions laser nanosecondes et des impulsions laser picosecondes, selon les besoins, avec un seul résonateur. À cet effet, un premier élément de commutation optique (105) et un second élément de commutation optique (102) sont placés à l'intérieur d'un résonateur (106), et des impulsions laser picosecondes de forte puissance sont générées au moyen du premier élément de commutation optique (105) et du second élément de commutation optique (102).
PCT/KR2018/001422 2017-10-11 2018-02-02 Dispositif de génération laser WO2019074166A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170130092A KR102044857B1 (ko) 2017-10-11 2017-10-11 레이저 발생장치
KR10-2017-0130092 2017-10-11

Publications (1)

Publication Number Publication Date
WO2019074166A1 true WO2019074166A1 (fr) 2019-04-18

Family

ID=66100825

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/001422 WO2019074166A1 (fr) 2017-10-11 2018-02-02 Dispositif de génération laser

Country Status (2)

Country Link
KR (1) KR102044857B1 (fr)
WO (1) WO2019074166A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102221082B1 (ko) * 2020-02-13 2021-02-26 (주)엘트라글로벌 다중 큐 스위칭을 이용한 다중 레이저 펄스 발진 방법 및 다중 레이저 펄스 발진 장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1197783A (ja) * 1997-09-24 1999-04-09 Mitsubishi Heavy Ind Ltd Ｑスイッチパルスレーザ駆動方法
US20040190564A1 (en) * 2003-01-29 2004-09-30 Lambda Solutions, Inc. Hybrid Q-switch device, lasers using the same, and method of operation
KR100840057B1 (ko) * 2006-12-06 2008-06-19 미쓰비시덴키 가부시키가이샤 레이저 장치
KR101487271B1 (ko) * 2013-08-14 2015-01-29 한국과학기술연구원 펄스 레이저 장치
JP2016015440A (ja) * 2014-07-03 2016-01-28 キヤノン株式会社 被検体情報取得装置およびレーザー装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1197783A (ja) * 1997-09-24 1999-04-09 Mitsubishi Heavy Ind Ltd Ｑスイッチパルスレーザ駆動方法
US20040190564A1 (en) * 2003-01-29 2004-09-30 Lambda Solutions, Inc. Hybrid Q-switch device, lasers using the same, and method of operation
KR100840057B1 (ko) * 2006-12-06 2008-06-19 미쓰비시덴키 가부시키가이샤 레이저 장치
KR101487271B1 (ko) * 2013-08-14 2015-01-29 한국과학기술연구원 펄스 레이저 장치
JP2016015440A (ja) * 2014-07-03 2016-01-28 キヤノン株式会社 被検体情報取得装置およびレーザー装置

Also Published As

Publication number Publication date
KR20190040674A (ko) 2019-04-19
KR102044857B1 (ko) 2019-11-14

Similar Documents

Publication Publication Date Title
Loesel et al. Laser-induced optical breakdown on hard and soft tissues and its dependence on the pulse duration: experiment and model
US20050215985A1 (en) Method of generating an ultra-short pulse using a high-frequency ring oscillator
KR101341744B1 (ko) 의료용 레이저 치료기의 전원장치
KR20180068984A (ko) 레이트 및/또는 진폭이 시간 변조되는 펄스 레이저 시스템
WO1994008372A1 (fr) Laser pulse module intracavitaire
WO1996042129A1 (fr) Laser a largeur de bande etroite et a grande largeur d'impulsions
CA2531353A1 (fr) Source de lumiere laser pulsee
CN113194861A (zh) 激光源、激光装置和切割组织的方法
US6188704B1 (en) Diode-pumped laser drive
KR102116021B1 (ko) 서브-나노초 지속기간의 레이저 펄스들을 생성하기 위한 레이저 시스템
Grace et al. Repetitively pulsed ruby lasers as light sources for high-speed photography
WO2019074166A1 (fr) Dispositif de génération laser
US20140269786A1 (en) Continuously variable pulse-width, high-speed laser
CN107086431B (zh) 驱动聚变冲击点火的复杂形状非相干激光脉冲的产生方法及装置
KR102230744B1 (ko) 레이저 발생 장치
WO2019074165A1 (fr) Dispositif de générateur laser
KR20170137415A (ko) 피코초 펄스 레이저 장치 및 구동 방법
US20110188522A1 (en) Reduction of timing jitter in a passive q-switched solid state laser
KR20170137406A (ko) 의료용 피코초 펄스 레이저 구동 장치 및 방법
JP2018032824A (ja) 光パルス信号生成装置、レーザ加工装置及びバイオイメージング装置
JP7492726B2 (ja) パルスレーザー発振装置
KR20150128218A (ko) 의료용 Ｃｒ2＋ 이온이 도핑된 레이저 장치 및 레이저 장치의 동작 방법
CN109149344A (zh) 一种利用激光差频实现超短脉冲中波红外激光输出的脉冲同步的系统
KR102373232B1 (ko) 다단 스테이지 광스위치를 이용하는 펄스 레이저 발생장치
CN110994351B (zh) 一种基于声光合束技术的新型调q激光器及方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18866810

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18866810

Country of ref document: EP

Kind code of ref document: A1