WO2017209354A1 - Driving apparatus and method for medical picosecond pulsed laser - Google Patents

Driving apparatus and method for medical picosecond pulsed laser Download PDF

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WO2017209354A1
WO2017209354A1 PCT/KR2016/011665 KR2016011665W WO2017209354A1 WO 2017209354 A1 WO2017209354 A1 WO 2017209354A1 KR 2016011665 W KR2016011665 W KR 2016011665W WO 2017209354 A1 WO2017209354 A1 WO 2017209354A1
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laser
picosecond
nonlinear element
pulse
pulsed laser
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French (fr)
Korean (ko)
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김정현
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원텍 주식회사
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
    • H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1312—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
    • 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
    • H01S2301/00—Functional characteristics
    • H01S2301/08—Generation of pulses with special temporal shape or frequency spectrum

Definitions

  • the present invention relates to a pulse control apparatus for a medical picosecond pulse laser generator, and to a high output pulse control apparatus for performing a high speed pulse switching speed at several pico (ps).
  • Picosecond pulsed lasers are being researched and applied in various fields such as IT, NT, BT, and ET. In the field of ultra-fine processing, it can be processed by minimizing heat affected zones, heat damage and cracks, and is processed by nonlinear optical phenomena of laser.
  • the present invention relates to the possibility of microtreatment without damaging surrounding tissues by high power picosecond pulsed laser in the field of medical treatment.
  • high-power picosecond pulsed lasers can deliver short pulses within the thermal relaxation time to tissues, indicating that pigment lesions caused by lasers require high power, as the absorption of pigments is relatively lower than the absorption of water.
  • the pigment particles can be effectively destroyed or disintegrated by the high-power picosecond pulse laser of the present invention, compared to the conventional nanosecond laser, and thus, the treatment effect is excellent in pigmented lesions such as tattoo removal or blemishes.
  • the high power picosecond pulsed laser refers to generating laser energy with extremely short pulse durations of several ps and high peak power per pulse.
  • the method of oscillating a laser in the form of a short pulse is classified into two methods. It is divided into Q-switching method and mode-locking method.
  • Q-switching method and mode-locking method.
  • Several methods have been developed to implement these approaches. There are an active amplitude or frequency electro-optic modulation method, a passive modulation method through a saturable absorber, a synchronous gain modulation method, and the like in the resonator. These methods are used for Q-switching and sometimes mode locking depending on the purpose required.
  • the Q-switching scheme is advantageous for obtaining high energy per pulse
  • the mode locking scheme is advantageous for obtaining short pulses. So the development history of picosecond laser pulses is consistent with the development of this mode locking method.
  • Active type is complicated overall system such as electronic circuit configuration to stabilize the output, and there is a 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.
  • the mode locking technique is used mainly to realize the pulse of the picosecond region, but the output that can be generated by this technique is about several tens of mJ, and the minimum output of several hundred mJ is required for the pigment treatment in the medical field. need.
  • Picosecond pulse generation technology with hundreds of mJ output power requires at least 2-3 pulse generation techniques.
  • Manual control such as active control switching technology and inductive Brillouin Scattering (SBS), which combines cue switching and mode locking, or a combination of cue switching and cavity dumping or pulse slicing. Compression techniques can be used to generate high power picosecond pulses.
  • SBS inductive Brillouin Scattering
  • Patent Nos. 10-2015-0115349 and 10-2007-0133032 are known.
  • the technical problem to be solved by the present invention is input signal 101 for generating a laser from the outside; Resonator 106; First controller 102; A first driving device 105; A first nonlinear element 107; A high speed signal generator 104; Second controller 103; Second nonlinear element 109; It is to provide a medical picosecond pulse laser driving apparatus including a second driving device (110).
  • the high speed signal generator 104 generates a switching signal in real time with precision and provides synchronization.
  • the first nonlinear element 107 and the second nonlinear element 109 are positioned inside the resonator 106, and the first nonlinear element 107 and the second nonlinear element ( 109) to generate a high power picosecond pulsed laser.
  • a high speed signal generator 104 is provided in order to precisely control the first nonlinear element 107 and the second nonlinear element 109 by the first driving device 105 and the second driving device 110. It is characterized by.
  • the high speed signal generator 104 is implemented by hardware such as FPGA for real time high speed precision control.
  • the pigmented lesion solves the need for high power in that the absorption rate of the pigment is relatively lower than the absorption rate of water, and thus the present invention is compared with the conventional nanosecond laser.
  • Pigment particles can be destroyed or disintegrated efficiently by high-power picosecond pulsed laser, which is excellent in the treatment of pigmented lesions such as tattoo removal and blemishes.
  • FIG. 1 is a schematic diagram of a high power picosecond pulsed laser generation apparatus of the present invention.
  • FIG. 2 is a diagram illustrating a cue switch driving signal flow of the present invention.
  • FIG. 3 is a diagram of a picosecond pulsed laser signal implemented by the present invention.
  • the resonator 106 may include a first nonlinear element 107, a laser generating element 108, and a second nonlinear element ( 109).
  • a self-explanatory technique for generating a high power picosecond pulse laser in the resonator 106 is not described.
  • the laser generating device 108 When the laser generating device 108 is pumped by the pumping light source, the laser oscillates.
  • the oscillated laser locates the first nonlinear element 107 and the second nonlinear element 109 to generate an optical pulse having hundreds of picoseconds or subnanosecond pulses, and generates the laser externally.
  • the first controller 102 transmits a signal for generating the laser to the first drive device 105 to be transmitted by the first drive device 105 by the first non-linear element ( 107).
  • the laser oscillated by the driving of the first nonlinear element 107 generates a first laser Q switching optical pulse.
  • the signal transmitted from the first controller to generate the laser to the first driving device 105 is simultaneously transferred to the high speed signal generator 104.
  • the signal of the first controller transmitted to the high speed signal generator 104 is a second nonlinear element before the first laser Q switching optical pulse is generated by the optical switching action of the first nonlinear element 107 after a predetermined time elapses.
  • the high speed signal generator 104 transmits a signal for driving the second driving device to the second driving device 110 so that the second nonlinear element 109 is driven by the second driving device 110. ) Is driven.
  • the second Q switching is performed for a time equal to the picosecond pulse time to be extracted by the second nonlinear element 109.
  • an optical amplification is caused in the resonator, and after a predetermined time, the pulse is applied to the second nonlinear element again to generate a picosecond optical pulse.
  • the conventional Q switching method generates a pulse of several nanoseconds to several tens of nanoseconds with a high peak output after a certain time after the Q trigger signal (Laser Buildup Time) .
  • a Q switching trigger pulse was applied to the optical switching element (T1) and after a period of time ( ⁇ t1) a second time before the laser Q switching optical pulse appeared.
  • a time Q switching signal pulse is applied as much as the picosecond pulse time to be extracted to the optical switching device at the time T3 when the Q switching optical pulse is generated.
  • a time Q switching signal pulse is applied as much as the picosecond pulse time to be extracted to the optical switching device at the time T3 when the Q switching optical pulse is generated.
  • the resonator When the resonator generates optical amplification, and after a certain time ( ⁇ t3), another pulse is applied to the optical switching device to extract the picosecond optical pulse.
  • one or two optical switching elements of the resonator may be used and may be changed according to the Q switching sequence design.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lasers (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Abstract

The present invention relates to a pulse control apparatus for a medical picosecond pulse generation apparatus, the high-power pulse control apparatus allowing high-power pulses to be switched at a high speed of several picoseconds (ps) range. To that end, a first nonlinear element (107) and second nonlinear element (109) are positioned in the interior of a resonator (106), and high-power picosecond pulsed lasers are generated by means of the first nonlinear element (107) and second nonlinear element (109). A separate high-speed signal generation apparatus is provided so that the first nonlinear element (107) and second nonlinear element (109) are precisely controlled by a first driving apparatus (105) and second driving apparatus (110).

Description

의료용 피코초 펄스 레이저 구동 장치 및 방법Medical picosecond pulse laser driving device and method
본 발명은 의료용 피코초 펄스 레이저 발생장치의 펄스 제어 장치에 관한 것으로, 고출력 펄스의 스위칭 속도를 수 피코(ps)대의 고속으로 수행할 수 있도록 하기 위한 고출력 펄스 제어 장치에 관한 것이다.The present invention relates to a pulse control apparatus for a medical picosecond pulse laser generator, and to a high output pulse control apparatus for performing a high speed pulse switching speed at several pico (ps).
피코초 펄스 레이저는 IT, NT, BT, ET 등 다양한 분야에서 연구 및 응용되고 있다. 초미세 가공 분야에서는 열 영향 영역이나 열 손상 및 갈라진 틈 등을 최소화하여 가공할 수 있으며 레이저의 비선형 광학 현상에 의해서 가공되므로 미세한 형상의 가공이 가능하므로 정밀가공이 있어야 하는 분야에 활발히 활용 되고 있다.본 발명은 의료용 치료 분야에서 고출력의 피코초 펄스 레이저에 의해 주위 조직에 손상을 주지 않으며 미세 치료가 가능한 것에 관한 것이다.Picosecond pulsed lasers are being researched and applied in various fields such as IT, NT, BT, and ET. In the field of ultra-fine processing, it can be processed by minimizing heat affected zones, heat damage and cracks, and is processed by nonlinear optical phenomena of laser. The present invention relates to the possibility of microtreatment without damaging surrounding tissues by high power picosecond pulsed laser in the field of medical treatment.
피부 치료에서 고출력 피코초 펄스 레이저는 열 이완시간 이내의 짧은 펄스를 조직에 전달할 수 있으므로, 레이저에 의한 색소 병변은 색소에 대한 흡수율이 물에 대한 흡수율보다 상대적으로 낮은 관계로 높은 출력을 요구하는 것을 해결하여 기존 나노초 단위의 레이저에 비해 본 발명의 고출력의 피코초 펄스 레이저에 의해서 색소 입자들을 효율적으로 파괴 또는 붕괴시킬 수 있으므로 문신제거 또는 기미등의 색소 병변에 치료효과가 우수하다고 볼 수 있다. 상기 고출력 피코초 펄스 레이저는 수 ps의 극초단 펄스 지속 시간 및 높은 펄스당 피크 출력을 하는 레이저 에너지를 생성하는 것을 말한다.In skin treatments, high-power picosecond pulsed lasers can deliver short pulses within the thermal relaxation time to tissues, indicating that pigment lesions caused by lasers require high power, as the absorption of pigments is relatively lower than the absorption of water. As a result, the pigment particles can be effectively destroyed or disintegrated by the high-power picosecond pulse laser of the present invention, compared to the conventional nanosecond laser, and thus, the treatment effect is excellent in pigmented lesions such as tattoo removal or blemishes. The high power picosecond pulsed laser refers to generating laser energy with extremely short pulse durations of several ps and high peak power per pulse.
레이저를 짧은 펄스형태로 발진하는 방식은 크게 두 가지 방식으로 분류된다. Q-스위칭(Q-switching) 방식과 모드 락킹(mode-locking) 방식으로 나뉜다. 이 방식들을 구현하기 위한 여러 방법이 개발되었다. 공진기 내부에 능동 진폭 또는 주파수 전기 광학 변조(active amplitude or frequency modulation)방법, 포화 흡수체(saturable absorbor)를 통한 수동 변조방법, 동기 이득 변조(synchronous gain modulation) 방법 등이 있다. 이 방법들은 필요한 목적에 따라 Q-스위칭 방식에, 때로는 모드 락킹 방식에 사용된다. 일반적으로 Q-스위칭 방식은 펄스당 높은 에너지를 얻기 위해 유리하며, 모드 락킹 방식은 짧은 펄스를 얻기에 유리하다. 그래서 피코초 레이저 펄스의 발전 역사는 바로 이 모드 락킹 방식의 발전과 일치한다.The method of oscillating a laser in the form of a short pulse is classified into two methods. It is divided into Q-switching method and mode-locking method. Several methods have been developed to implement these approaches. There are an active amplitude or frequency electro-optic modulation method, a passive modulation method through a saturable absorber, a synchronous gain modulation method, and the like in the resonator. These methods are used for Q-switching and sometimes mode locking depending on the purpose required. In general, the Q-switching scheme is advantageous for obtaining high energy per pulse, and the mode locking scheme is advantageous for obtaining short pulses. So the development history of picosecond laser pulses is consistent with the development of this mode locking method.
능동형은 출력을 안정화하는 전자 회로 구성 등 전체적인 시스템이 복잡하고, 장시간 안정적인 모드 락킹 발진에 어려움이 있다. 반면 수동형 방식은 포화 흡수체를 사용하므로 모드 락킹 제어에 어려움이 있다.Active type is complicated overall system such as electronic circuit configuration to stabilize the output, and there is a difficulty in stable mode locking oscillation for a long time. On the other hand, the passive type uses a saturated absorber, which makes it difficult to control the mode locking.
피코초 영역의 펄스를 구현하기 위해서는 전통적으로 모드 락킹 기술이 주로 사용되고 있으나 이 기술로 생성할 수 있는 출력은 ~ 수십 mJ 정도이며, 의료분야의 색소치료용으로 사용되기 위해서는 최소 ~ 수백 mJ의 출력이 필요하다.Traditionally, the mode locking technique is used mainly to realize the pulse of the picosecond region, but the output that can be generated by this technique is about several tens of mJ, and the minimum output of several hundred mJ is required for the pigment treatment in the medical field. need.
수백 mJ 급의 출력을 하는 피코초 펄스 생성기술은 최소 2~3가지 정도의 펄스 생성 기술이 필요하다.Picosecond pulse generation technology with hundreds of mJ output power requires at least 2-3 pulse generation techniques.
큐스위칭과 모드락킹을 이용한 방법이나 큐스위칭과 케비티 덤핑(Cavity Dumping) 또는 펄스 슬라이싱(Pulse Slicing)등을 조합한 능동제어 스위칭 기술과 유도 브릴루안 산란(Stimulated Brillouin Scattering, SBS)와 같은 수동제어 압축기술을 이용하면 고 출력의 피코초 영역의 펄스를 생성할 수 있다.Manual control, such as active control switching technology and inductive Brillouin Scattering (SBS), which combines cue switching and mode locking, or a combination of cue switching and cavity dumping or pulse slicing. Compression techniques can be used to generate high power picosecond pulses.
상기와 같이 펄스 생성 기술을 조합하여 피코초 펄스 레이저를 발생하기 위해서는 펄스 생성 기술의 결합에서 고속의 신호 동기가 필요하다.In order to generate a picosecond pulse laser by combining pulse generation techniques as described above, high speed signal synchronization is required in combination of pulse generation techniques.
상기와 같은 의료용 피코초 펄스 레이저 구동 장치와 관련된 선행기술로는 출원특허 제10-2015-0115349 및 10-2007-0133032 가 공지되어 있다.As the prior art related to the medical picosecond pulse laser driving apparatus as described above, Patent Nos. 10-2015-0115349 and 10-2007-0133032 are known.
따라서 본 발명이 해결하고자 하는 기술적 과제는 외부에서 레이저를 발생시키기 위한 신호를 입력 장치(101); 공진기(106); 제1제어기(102); 제1구동장치(105); 제1비선형소자(107); 고속신호 발생장치(104); 제2제어기(103); 제2비선형소자(109); 제2구동장치(110)를 포함하는 의료용 피코초 펄스 레이저 구동장치를 제공하는 것이다. 상기 고속신호 발생장치(104)에 의해서 제2구동장치를 실시간으로 정밀하게 스위칭 신호를 발생하고 동기화를 제공하는 데 있다.Therefore, the technical problem to be solved by the present invention is input signal 101 for generating a laser from the outside; Resonator 106; First controller 102; A first driving device 105; A first nonlinear element 107; A high speed signal generator 104; Second controller 103; Second nonlinear element 109; It is to provide a medical picosecond pulse laser driving apparatus including a second driving device (110). The high speed signal generator 104 generates a switching signal in real time with precision and provides synchronization.
본 발명이 이루고자 하는 기술적 과제들은 이상에서 언급한 기술적 과제들로 제한되지 않으며, 언급되지 않은 다른 기술적 과제들은 아래의 기재로부터 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 명확하게 이해될 수 있을 것이다.Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above may be clearly understood by those skilled in the art from the following description. There will be.
본 발명은 상기와 같은 문제를 해결하기 위해서, 제1비선형소자(107) 및 제2비선형소자(109)를 공진기(106) 내부에 위치시키고, 제1비선형소자(107) 및 제2비선형소자(109)를 통해서 고출력 피코초 펄스 레이저를 생성하도록 하는 것을 특징으로 한다. 상기 제1구동장치(105) 및 제2구동장치(110)에 의해서 제1비선형소자(107) 및 제2비선형소자(109)가 정밀하게 제어되기 위해서 별도로 고속신호 발생장치(104)를 구비하는 것을 특징으로 한다. 상기 고속신호 발생장치(104)는 실시간 고속 정밀 제어를 위해서 FPGA등의 하드웨어에 의해서 구현되는 것을 특징으로 한다.According to the present invention, in order to solve the above problems, the first nonlinear element 107 and the second nonlinear element 109 are positioned inside the resonator 106, and the first nonlinear element 107 and the second nonlinear element ( 109) to generate a high power picosecond pulsed laser. In order to precisely control the first nonlinear element 107 and the second nonlinear element 109 by the first driving device 105 and the second driving device 110, a high speed signal generator 104 is provided. It is characterized by. The high speed signal generator 104 is implemented by hardware such as FPGA for real time high speed precision control.
본 발명의 피코초 펄스 레이저에 의한 색소 병변의 치료에서, 색소 병변은 색소에 대한 흡수율이 물에 대한 흡수율보다 상대적으로 낮은 관계로 높은 출력을 요구하는 것을 해결하여 기존 나노초 단위의 레이저에 비해 본 발명의 고출력의 피코초 펄스 레이저에 의해서 색소 입자들을 효율적으로 파괴 또는 붕괴시킬 수 있으므로 문신제거 및 기미등의 색소 병변에 치료효과가 우수하다.In the treatment of pigmented lesions by the picosecond pulsed laser of the present invention, the pigmented lesion solves the need for high power in that the absorption rate of the pigment is relatively lower than the absorption rate of water, and thus the present invention is compared with the conventional nanosecond laser. Pigment particles can be destroyed or disintegrated efficiently by high-power picosecond pulsed laser, which is excellent in the treatment of pigmented lesions such as tattoo removal and blemishes.
도 1은 본 발명의 고출력 피코초 펄스 레이저 생성 장치의 개략도이다.1 is a schematic diagram of a high power picosecond pulsed laser generation apparatus of the present invention.
도 2는 본 발명의 큐스위치 구동 신호 흐름에 관한 도면이다.2 is a diagram illustrating a cue switch driving signal flow of the present invention.
도 3은 본 발명에 의해 구현된 피코초 펄스 레이저 신호에 관한 도면이다.3 is a diagram of a picosecond pulsed laser signal implemented by the present invention.
도 1은 본 발명의 고출력 피코초 펄스 레이저 생성 장치의 개략도로서, 피코초 펄스 레이저를 생성하기 위해서 공진기(106)는 제1비선형소자(107), 레이저발생소자(108) 및 제2비선형소자(109)를 포함한다. 본 발명에서는 상기 공진기(106)에서 고출력 피코초 펄스 레이저를 발생시키기 위한 자명한 기술은 표기하지 않았다.1 is a schematic diagram of a high power picosecond pulsed laser generation apparatus of the present invention, in order to generate a picosecond pulsed laser, the resonator 106 may include a first nonlinear element 107, a laser generating element 108, and a second nonlinear element ( 109). In the present invention, a self-explanatory technique for generating a high power picosecond pulse laser in the resonator 106 is not described.
펌핑 광원으로 레이저발생소자(108)를 펌핑하면 레이저가 발진하게 된다. 상기 발진 된 레이저는 수백 피코초 또는 서브 나노초(subnanosecond)급 펄스를 갖는 광펄스를 생성하기 위해서 제1비선형소자(107)와 제2비선형소자(109)를 위치 시키고, 외부에서 레이저를 발생시키기 위한 신호를 입력 장치(101)에 의해서 입력되면 제1제어기(102)는 상기 레이저를 발생시키기 위한 신호를 제1구동장치(105)에 전달하여 제1구동장치(105)에 의해서 제1비선형소자(107)를 구동하도록 한다. 상기 제1비선형소자(107)의 구동에 의해서 발진 된 레이저는 제1레이저 Q 스위칭 광펄스를 생성하게 된다. 상기 제1제어기에서 제1구동장치(105)에 레이저를 발생시키기 위해서 전달된 신호는 동시에 고속신호 발생장치(104)로 전달된다. When the laser generating device 108 is pumped by the pumping light source, the laser oscillates. The oscillated laser locates the first nonlinear element 107 and the second nonlinear element 109 to generate an optical pulse having hundreds of picoseconds or subnanosecond pulses, and generates the laser externally. When the signal is input by the input device 101, the first controller 102 transmits a signal for generating the laser to the first drive device 105 to be transmitted by the first drive device 105 by the first non-linear element ( 107). The laser oscillated by the driving of the first nonlinear element 107 generates a first laser Q switching optical pulse. The signal transmitted from the first controller to generate the laser to the first driving device 105 is simultaneously transferred to the high speed signal generator 104.
상기 고속신호 발생장치(104)에 전달된 상기 제1제어기의 신호는 일정시간 경과 후 제1비선형소자(107)의 광스위칭 작용에 의해서 제1레이저 Q 스위칭 광펄스가 생성되기 전에 제2비선형소자(109)를 구동하기 위해서 고속신호 발생장치(104)에서는 제2구동장치(110)에 제2구동장치를 구동하기 위한 신호를 전달하여 제2구동장치(110)에 의해서 제2비선형소자(109)가 구동된다. 일정시간 경과 후 제1비선형소자(107)에 의해서 생서된 제1 Q 스위칭 광펄스가 출현되는 시점에서 제2비선형소자(109)에 의해서 추출하고자 하는 피코초 펄스 시간만큼의 시간 동안 제2 Q 스위칭 신호의 펄스가 인가되면 공진기에서 광증폭을 일으키고, 일정시간 후에 또 한 번 펄스를 제2비선형소자에 인가하여 피코초 광펄스를 생성한다.  The signal of the first controller transmitted to the high speed signal generator 104 is a second nonlinear element before the first laser Q switching optical pulse is generated by the optical switching action of the first nonlinear element 107 after a predetermined time elapses. In order to drive 109, the high speed signal generator 104 transmits a signal for driving the second driving device to the second driving device 110 so that the second nonlinear element 109 is driven by the second driving device 110. ) Is driven. After a certain time elapses, when the first Q switching optical pulse generated by the first nonlinear element 107 appears, the second Q switching is performed for a time equal to the picosecond pulse time to be extracted by the second nonlinear element 109. When a pulse of the signal is applied, an optical amplification is caused in the resonator, and after a predetermined time, the pulse is applied to the second nonlinear element again to generate a picosecond optical pulse.
도 2는 본 발명의 큐스위치 구동 신호 흐름에 관한 도면으로서, 기존 Q 스위칭 방법은 Q 트리거 신호 후 일정시간이 지난 후(Laser Buildup Time) 높은 첨두 출력을 갖는 수 나노초에서 수십 나노초의 펄스를 생성한다. 수백 피코초 또는 서브 나노초(subnanosecond)급 펄스를 갖는 광펄스를 생성하기 위해 광스위칭 소자에 Q 스위칭 트리거 펄스를 인가하고(T1) 일정시간 경과 후(Δt1) 레이저 Q 스위칭 광펄스가 출현하기 전에 두번째 Q 스위칭 트리거 펄스를 인가하고(T2) 일정시간 경과 후(Δt2) Q 스위칭 광펄스가 생성되는 시점(T3)에서 광스위칭 소자에 추출하고자 하는 피코초 펄스 시간만큼의 시간 Q 스위칭 신호의 펄스가 인가되면 공진기에서 광증폭을 일으키고 일정시간 후(Δt3)에 또 한 번 펄스를 광스위칭 소자에 인가 하 피코초 광펄스를 추출하는 원리이다. 본 발명을 위해 공진기의 광스위칭 소자는 1개 또는 2개를 사용할 수 있고, Q 스위칭 시퀀스 설계에 따라서 변경될 수 있다.2 is a diagram of a cue switch driving signal flow of the present invention, the conventional Q switching method generates a pulse of several nanoseconds to several tens of nanoseconds with a high peak output after a certain time after the Q trigger signal (Laser Buildup Time) . To generate an optical pulse with hundreds of picoseconds or subnanosecond pulses, a Q switching trigger pulse was applied to the optical switching element (T1) and after a period of time (Δt1) a second time before the laser Q switching optical pulse appeared. After the Q switching trigger pulse is applied (T2) and a predetermined time has elapsed (Δt2), a time Q switching signal pulse is applied as much as the picosecond pulse time to be extracted to the optical switching device at the time T3 when the Q switching optical pulse is generated. When the resonator generates optical amplification, and after a certain time (Δt3), another pulse is applied to the optical switching device to extract the picosecond optical pulse. For the present invention, one or two optical switching elements of the resonator may be used and may be changed according to the Q switching sequence design.

Claims (6)

  1. 의료용 피코초 펄스 레이저 구동 장치에서,In medical picosecond pulsed laser drive device,
    레이저를 발생시키기 위한 레이저 발생소자를 포함하는 공진기;A resonator including a laser generating element for generating a laser;
    고출력 서브 나노초 펄스 레이저를 만들기 위한 제1비선형소자;A first nonlinear device for making a high power sub nanosecond pulsed laser;
    고출력 피코초 펄스 레이저를 만들기 위한 제2비선형소자;A second nonlinear element for making a high power picosecond pulsed laser;
    상기 제1비선형소자 및 제2비선형소자를 구동하기 위한 제1구동장치 및 제2First and second driving devices for driving the first nonlinear element and the second nonlinear element
    구동장치;Drive device;
    상기 제1구동장치를 구동하기 위한 제1제어기;A first controller for driving the first driving device;
    상기 제2구동장치를 구동하기 위한 제2제어기 및 고속신호 발생장치로 구성A second controller and a high speed signal generator for driving the second drive device
    되는 것을 특징으로 하는 피코초 펄스 레이저 발생 장치.Picosecond pulsed laser generator, characterized in that.
  2. 청구항 1에서, 제1비선형소자 및 제2비선형소자는 DKDP인 것을 특징으로 하The method of claim 1, wherein the first non-linear element and the second non-linear element is characterized in that the DKDP
    는 피코초 펄스 레이저 발생 장치.Picosecond pulse laser generator.
  3. 청구항 1에서, 레이저발생소자는 Nd:YAG인 것을 특징으로 하는 피코초 펄스The picosecond pulse of claim 1, wherein the laser generating device is Nd: YAG.
    레이저 발생 장치.Laser generating device.
  4. 청구항 1에서, 레이저발생소자를 펌핑 하기 위해서 레이저 또는 아크 램프The laser or arc lamp of claim 1, for pumping a laser generating device.
    중 하나를 사용하는 것을 특징으로 하는 피코초 펄스 레이저 발생 장치.Picosecond pulsed laser generator, characterized in that using one of.
  5. 청구항 1에서, 고출력 피코초 펄스 레이저의 검출 소자는 광검출기인 것을The method according to claim 1, wherein the detection element of the high power picosecond pulsed laser is a photodetector
    특징으로 하는 피코초 펄스 레이저 발생 장치.A picosecond pulsed laser generator.
  6. 청구항 1에서, 고속 신호 발생 장치는 FPGA로 구현되는 것을 특징으로 하는The apparatus of claim 1, wherein the high speed signal generator is implemented in an FPGA.
    피코초 펄스 레이저 발생 장치.Picosecond pulsed laser generator.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100840057B1 (en) * 2006-12-06 2008-06-19 미쓰비시덴키 가부시키가이샤 Laser device
KR20120003064A (en) * 2010-07-02 2012-01-10 원테크놀로지 주식회사 The laser resonator for long pulse at ternary wavelengths
JP2012216637A (en) * 2011-03-31 2012-11-08 Hitachi Zosen Corp Apparatus for converting wavelength of laser beam
KR101341744B1 (en) * 2012-05-08 2013-12-16 홍정환 Power supply of medical laser therapy
JP2016015440A (en) * 2014-07-03 2016-01-28 キヤノン株式会社 Subject information acquisition device and laser device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100840057B1 (en) * 2006-12-06 2008-06-19 미쓰비시덴키 가부시키가이샤 Laser device
KR20120003064A (en) * 2010-07-02 2012-01-10 원테크놀로지 주식회사 The laser resonator for long pulse at ternary wavelengths
JP2012216637A (en) * 2011-03-31 2012-11-08 Hitachi Zosen Corp Apparatus for converting wavelength of laser beam
KR101341744B1 (en) * 2012-05-08 2013-12-16 홍정환 Power supply of medical laser therapy
JP2016015440A (en) * 2014-07-03 2016-01-28 キヤノン株式会社 Subject information acquisition device and laser device

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