WO2008017214A1 - Procédé d'élaboration d'un laser solide à quatrième harmonique - Google Patents

Procédé d'élaboration d'un laser solide à quatrième harmonique Download PDF

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Publication number
WO2008017214A1
WO2008017214A1 PCT/CN2006/001978 CN2006001978W WO2008017214A1 WO 2008017214 A1 WO2008017214 A1 WO 2008017214A1 CN 2006001978 W CN2006001978 W CN 2006001978W WO 2008017214 A1 WO2008017214 A1 WO 2008017214A1
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WO
WIPO (PCT)
Prior art keywords
harmonic
laser
nonlinear crystal
generating method
cavity
Prior art date
Application number
PCT/CN2006/001978
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English (en)
Chinese (zh)
Inventor
Shuzhen Ma
Liying Chen
Yunfeng Gao
Original Assignee
Shenzhen Han's Laser Technology Co., Limited
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 Shenzhen Han's Laser Technology Co., Limited filed Critical Shenzhen Han's Laser Technology Co., Limited
Priority to PCT/CN2006/001978 priority Critical patent/WO2008017214A1/fr
Publication of WO2008017214A1 publication Critical patent/WO2008017214A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics
    • G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
    • G02F1/3532—Arrangements of plural nonlinear devices for generating multi-colour light beams, e.g. arrangements of SHG, SFG, OPO devices for generating RGB light beams
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/16—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 series; tandem
    • 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
    • H01S3/109—Frequency multiplication, e.g. harmonic generation

Definitions

  • the invention relates to a fourth harmonic solid laser generating method. Background technique
  • Coherent Corporation of the United States has developed a laser average power of 1- 3wM: YAG Q-quad four-frequency laser, mainly used for laser marking and TFT cutting; developed a laser power of 200 to earn continuous quadruple-frequency laser, mainly used in semiconductor silicon wafers Quality inspection and ⁇ : lithography.
  • Spectra-Physics Inc. of the United States has developed a laser average power of l-2w Q-switched Nd: ⁇ ⁇ lw continuous quadratic laser, which can be used for wafer cutting, gem substrate dicing, drilling microvia, FBG manufacturing and DVD disc engraving. system.
  • the harmonics are usually focused outside the laser cavity to a quadruple-frequency nonlinear crystal, and sufficient secondary harmonic power density is obtained to improve the frequency multiplication efficiency, such as the US patent of Sony Corporation.
  • U.S. Patent No. 6,249,371 and Acuhiglir, U.S. Patent No. 6,716,620 B2 which is simple and stable, is suitable for generating medium and small power, but is liable to cause damage to nonlinear media by high power lasers.
  • the second harmonic that is not converted to the fourth harmonic will be wasted through the nonlinear crystal. Therefore, the conversion efficiency of the fourth harmonic laser is also limited.
  • Spectra-Physics and Coherent use a moving nonlinear crystal method to scan the incident second harmonic light in a two-dimensional point-by-point manner on the fourth harmonic crystal.
  • High power, high efficiency fourth harmonic laser output is available.
  • the point-by-point scanning has a problem of nonlinear crystal temperature matching, and the crystal shift instantaneously causes a laser abrupt change to cause the fourth-order harmonic laser power to form a transient power drop sharply.
  • Another laser Q-switched fourth harmonic generation method is a harmonic wave series method in a fundamental wave cavity.
  • the above-mentioned commonly used fourth harmonic crystal is BB0, and the second harmonic laser is multiplied by BB0 to obtain the ultraviolet band.
  • US Patent No. 6,249,371 of the sony company uses a fundamental wave and a third harmonic to obtain a fourth harmonic laser output by mixing on the LB0 crystal.
  • the new nonlinear crystal CLB0 has high harmonic conversion efficiency and excellent deep ultraviolet transmission.
  • CLB0 is prone to deliquescence and the material is soft and brittle, and needs to be gradually improved to be used in industrial products.
  • Ultraviolet continuous laser generation uses a second harmonic single-frequency laser input to the external cavity resonator, and uses a strong focusing method to increase the spatial power density to produce an ultraviolet fourth harmonic laser.
  • Coherent used X-type and Cfra-Phys i cs to obtain Q. 2-2 W fourth-order harmonic laser output using a ⁇ -type cavity.
  • this external resonant cavity is strictly required by the environment. It must be equipped with an automatic optical path compensation follow-up device and an optical mechanical automatic tracking device. It requires high mechanical and temperature stability and is usually used for scientific research of experiments. In industrial production.
  • the domestic fourth-order harmonic ultraviolet laser is still in the basic research stage.
  • the joint research of Nanjing University and Shandong Normal University has obtained 63 bribe/266 ship laser output by the out-of-cavity focusing frequency multiplication method ( ⁇ Journal of Physics ⁇ , He Jingliang, et al., Volume 49 , No. 10, 2000, pp. 2106-2108).
  • a continuous 266 mn laser signal was detected by the external cavity resonance method used by Xi'an Opto-mechanics (Journal of Photonics, Chen Guofu et al., Vol. 28, No. 8, 1999, pp. 684-687).
  • the object of the present invention is to overcome the shortcomings of the prior art and provide a fourth harmonic which can obtain a stable fourth harmonic solid laser output and has high light conversion efficiency and long service life of a nonlinear crystal. Solid laser generation method.
  • the technical solution adopted by the present invention to solve the technical problem is:
  • the fourth harmonic solid laser generating method applies a high power density fundamental wave to a second frequency nonlinear crystal to generate a second harmonic, and a second harmonic injection
  • a quadruple-frequency nonlinear crystal On a quadruple-frequency nonlinear crystal, a multi-integrated fourth-order harmonic solid-state laser output is generated by intracavity-cavity multiple reflection and non-focusing beams, and the fundamental and second harmonic polarized light are folded at a small angle to form an optical path.
  • Low-loss polarization coupling, the infrared fundamental resonator is designed to balance the high power density stable cavity structure with the laser medium thermal lens, and fold the optical path with multiple small angles of total internal reflection.
  • the innovation of the present invention over the prior art is:
  • the fundamental wave and the second harmonic polarized light are folded at a small angle to form a low loss polarization coupling, and the infrared fundamental wave resonator It is designed to balance the high power density stable cavity structure with the laser medium thermal lens, and fold the optical path with multiple small angles of internal total reflection to form a high linear polarization laser oscillation. Under these two conditions, a high power density fundamental wave is generated.
  • a high power density fundamental wave semiconductor pumped solid-state laser cavity and efficient harmonic conversion efficiency are designed using matrix optics and nonlinear programming.
  • the high-power density fundamental wave is applied to the second-frequency nonlinear crystal to generate the second harmonic, and the second harmonic is injected into the quadruple-frequency nonlinear crystal, and the second harmonic cavity-in-cavity multiple reflection method is adopted.
  • the second harmonic forms a closed circuit multiple total reflection, and generates a quadratic harmonic solid laser output that is accumulated multiple times.
  • the second harmonic that is not converted into the fourth harmonic is multiplied by the nonlinear crystal multiple times, and fully utilized.
  • the second harmonic power is used to achieve high conversion efficiency; the non-focusing beam method is adopted to avoid the second harmonic of high power density incident on the quadruple frequency nonlinear crystal to destroy the surface film layer and prolong the service life of the nonlinear crystal.
  • the fourth harmonic solid laser generating method of the present invention does not need to move the nonlinear crystal, and avoids the sudden change of the laser power caused by the temperature mismatch caused by the point-by-point scanning, thereby ensuring the stability of the output laser.
  • Figure la is a schematic diagram of the principle of the fourth harmonic solid laser generation method of the present invention.
  • Figure lb is a schematic diagram of the principle of the fourth harmonic solid laser generating method of the present invention.
  • Fig. 3 is a graph showing the results of calculation of the efficiency and power accumulation of the fourth harmonic solid laser generated in the preferred mode of the fourth harmonic solid laser generating method of the present invention.
  • Fig. 5 is a graph showing the calculation results of the variation curves of the fourth harmonic solid laser output power and the double frequency to quadruple frequency conversion efficiency corresponding to different repetition frequencies in the preferred mode of the fourth harmonic solid laser generation method of the present invention.
  • FIG. 1a The principle of the fourth harmonic solid laser generating method of the present invention is shown in FIG. 1a, and a fundamental wave oscillator is used, which includes a high power laser diode array side pumping module 7, a Q switch 3, a horizontal linear polarizing plate 6, and a limit. Die hole 2, end total mirror (1, 10, 13), nonlinear crystal (9, 12) and angle mirror (4, 5, 8, 11). The angle mirrors (4, 5, 8, and 11) are small angle mirrors in the cavity.
  • the cavity length and the curvature of the end face mirror are designed to make the infrared laser cavity hot.
  • the lens still maintains stable oscillation under a wide range of changes, and the calculation results are shown in Figures 2a and 2b.
  • the mode limiting aperture 2 is placed near the optical waist of the end total reflection mirror 1 to control the fundamental laser to oscillate in a single mode or a low order mode.
  • a double frequency nonlinear crystal is placed at the other optical waist close to the end total reflection mirror 10. Because the infrared laser cavity is closed or internally totally reflected, and is balanced with the thermal lens effect of high power pumping, This achieves a high intracavity power density.
  • the element generating the second harmonic includes a nonlinear crystal 9, an end total reflection mirror 10, an end total reflection mirror 13, an angle mirror 8 and an angle mirror 11, wherein the nonlinear crystal 9 is a double frequency crystal.
  • the Brewster mirror is set in an orientation suitable for horizontally polarized transmission and vertically polarized high reflection angle.
  • Angle mirror 8 plated fundamental wave P-direction high transmission and second harmonic S-direction high-reflection two-color film, angle mirror 11 plated second harmonic S-direction high reflection, fourth harmonic P-direction high transmission two-color film.
  • the second harmonic constitutes closed low-loss polarization coupled total reflection, and the formation process is as follows: horizontally polarized fundamental wave light from the direction of the end total reflection mirror 10, and vertically polarized second harmonic light is generated in the double frequency crystal 9
  • the harmonic light is applied to the quadruple frequency crystal 12 via the angled mirror 8 and 11 polarization-coupling total reflection, and is then totally reflected from the end total reflection mirror 13 to return from the original optical path.
  • the components for generating the fourth harmonic include a nonlinear crystal 12, a polarization coupling angle mirror 11 and an end total reflection mirror 13, which are single-ended open reflection cavity structures with low loss and single beam output characteristics, wherein the nonlinear crystal 12 is used as Quadruple frequency crystal.
  • the fourth harmonic generation process is as follows: the vertically polarized second harmonic light from the angle mirror 8 is reflected by the angle mirror 11 and then incident on the quadruple frequency crystal 12 to generate a horizontally polarized fourth harmonic laser, the fourth The double frequency light is reflected back from the original path by the end total reflection mirror 13 and output through the angle mirror 11.
  • the second harmonic which is not converted is again composed of the end total reflection mirror 10, the angle mirror 8, the angle mirror 11, and the end total reflection mirror 13 again.
  • the quadruple frequency crystal 12 After the reflection, the quadruple frequency crystal 12 is applied, and the regenerated fourth harmonic light is coupled and output through the angle mirror 11, so that multiple round trips are multiplied in the quadruple frequency crystal 12, thereby generating a highly efficient fourth harmonic laser. Output.
  • the present invention can also employ a vertical linear polarizing plate 6, in which the process of generating the second harmonic and the fourth harmonic is as shown in Fig. lb:
  • the element generating the second harmonic includes a nonlinear crystal 9, an end total reflection mirror 10, an end total reflection mirror 13, an angle mirror 8 and an angle mirror 11, wherein the nonlinear crystal 9 is a double frequency crystal.
  • the second harmonic constitutes closed low-loss polarization coupled total reflection, and the formation process is as follows: vertical polarization fundamental wave light from the direction of the end total reflection mirror 10, horizontally polarized second harmonic light is generated in the double frequency crystal 9
  • the harmonic light is totally reflected by the angle mirror 8, and the angle mirror 11 is totally transmitted to the quadruple frequency crystal 12, and then totally reflected from the end total reflection mirror 13 to return from the original optical path.
  • the components for generating the fourth harmonic include a nonlinear crystal 12, a polarization combining angle mirror 11 and an end total reflection mirror 13, which are single-ended open-type reflective cavity structures with low loss and single beam output characteristics, wherein the nonlinear crystal 12 As a quadruple frequency crystal.
  • the fourth harmonic generation process is as follows: the horizontally polarized second harmonic light from the angle mirror 8 is transmitted through the angle mirror 11 and then incident on the quadruple frequency crystal 12, causing the vertical a linearly polarized fourth harmonic laser that is reflected back from the original path by the end total reflection mirror 13 and reflected by the angle mirror 11 to be outputted.
  • the second harmonic that is not converted is provided by the end total reflection mirror 10 and the angle mirror. 8.
  • the angle mirror 11 and the end total reflection mirror 13 are again reflected to act on the quadruple frequency crystal 12, and the regenerated fourth harmonic light is reflected and output through the angle mirror 11, so that multiple round trips are used in the quadruple frequency crystal 12 Therefore, a very efficient fourth harmonic laser output is produced.
  • a preferred mode was selected for calculation.
  • the efficiency and power of the fourth harmonic laser are calculated by the NL0 program and multiple times of frequency-doubled light superposition method.
  • the calculation results are shown in Fig. 3.
  • the calculation result is shown in Fig. 4.
  • the power component of the multiplier is a nonlinear decrementing curve, and the cumulative power of the successive multiplier is 2.98 times that of the single mixing power, which is 1.75 times of the two mixing powers.
  • Fig. 5 is a graph showing the calculation results of the variation curves of the fourth harmonic laser output power and the double frequency to quadruple frequency conversion efficiency corresponding to different repetition frequencies.
  • a high power diode laser array side pumped laser cavity four-frequency frequency experimental device is used for the test.
  • the fundamental to second harmonic conversion efficiency ⁇ 80%.
  • the harmonic power conversion is most effective, and the fourth harmonic efficiency is 20%.
  • the fundamental wave and the second harmonic polarized light are folded at a small angle to form a low loss polarization coupling, and the infrared fundamental wave resonator is designed to balance the high power density stable cavity with the laser medium thermal lens.
  • the structure, and the use of multiple small angles of total internal reflection to fold the optical path, forms a high linear polarization laser oscillation, under these two conditions, produces a high power density fundamental wave.
  • the semiconductor pumped solid-state laser cavity with high power density fundamental wave and high efficiency harmonic conversion efficiency are designed by matrix optics and nonlinear programming.
  • the high-power density fundamental wave is applied to the second-frequency nonlinear crystal to generate the second harmonic, and the second harmonic is injected into the quadruple-frequency nonlinear crystal, and the second harmonic cavity-in-cavity multiple reflection method is adopted.
  • the second harmonic that is not converted to the fourth harmonic is multiplied by the nonlinear crystal multiple times, making full use of the second harmonic power to achieve high conversion efficiency; using the unfocused beam method Avoid the second harmonic of high power density incident on the quadruple-frequency nonlinear crystal to destroy the surface film layer and prolong the service life of the nonlinear crystal.
  • the fourth harmonic solid laser generating method of the invention does not need to move the nonlinear crystal, and avoids the sudden change of the laser power caused by the temperature mismatch caused by the point-by-point scanning, thereby ensuring the stability of the output laser.
  • the double frequency nonlinear crystal used may be a class I LBO, a class I BB0 or a class I CLB0 nonlinear crystal
  • the nonlinear crystal may be a class I LBO, a class I BB0 or a class I CLB0 nonlinear crystal
  • the fundamental solid laser medium used may be: M: YAG, Nd: YV04, Nd: YLF, Nd: Glass, Yb: YAG Or Er: YAG
  • the Q switch used can be an acousto-optic switch, an electro-optic switch or a saturation-activated passive Q-switch.
  • the pumping source used may be a side pump of a high power semiconductor laser diode, a longitudinal pumping of the diode end face, or a side pump of a xenon lamp or a xenon lamp.
  • a small angle folding cavity structure, a 45° angle folded cavity structure or a Brewster angle folded cavity structure can be used.

Abstract

L'invention porte sur un procédé d'élaboration d'un laser solide produisant un quatrième harmonique consistant: à produire un deuxième harmonique en faisant interagir une longueur d'onde fondamentale de forte puissance avec un cristal optique (9) non linéaire de deuxième harmonique; et à produire le quatrième harmonique en introduisant le deuxième harmonique dans un cristal optique (9) non linéaire de quatrième harmonique (12). L'invention porte également sur un procédé selon lequel le deuxième harmonique est réfléchi plusieurs fois dans une cavité et hors de la cavité de manière à produire un quatrième harmonique par accumulation. Ces procédés se caractérisent par un rendement élevé et la stabilité de la fréquence de sortie. Le cristal optique non linéaire à une longue durée de vie.
PCT/CN2006/001978 2006-08-04 2006-08-04 Procédé d'élaboration d'un laser solide à quatrième harmonique WO2008017214A1 (fr)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108448375A (zh) * 2018-04-27 2018-08-24 国科世纪激光技术（天津）有限公司 固定脉宽腔内倍频绿光激光器以及操作方法
CN108471042A (zh) * 2018-04-27 2018-08-31 国科世纪激光技术（天津）有限公司 固定脉宽腔内倍频紫外激光器以及操作方法
CN108521071A (zh) * 2018-04-27 2018-09-11 国科世纪激光技术（天津）有限公司 不同频率固定脉宽固体激光器以及操作方法
CN108572061A (zh) * 2018-07-23 2018-09-25 中国工程物理研究院激光聚变研究中心 全口径谐波转换效率测量系统及其测量方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03145777A (ja) * 1989-10-31 1991-06-20 Hoya Corp 高調波発生レーザ装置
US5943351A (en) * 1997-05-16 1999-08-24 Excel/Quantronix, Inc. Intra-cavity and inter-cavity harmonics generation in high-power lasers
CN1402390A (zh) * 2002-08-13 2003-03-12 深圳市大族激光科技股份有限公司 高效率、高功率三次谐波激光产生技术
US6697391B2 (en) * 2002-03-28 2004-02-24 Lightwave Electronics Intracavity resonantly enhanced fourth-harmonic generation using uncoated brewster surfaces
JP2005243879A (ja) * 2004-02-26 2005-09-08 Sumitomo Heavy Ind Ltd 高調波レーザビーム発生装置
CN1855648A (zh) * 2005-04-28 2006-11-01 深圳市大族激光科技股份有限公司 四次谐波固体激光产生方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03145777A (ja) * 1989-10-31 1991-06-20 Hoya Corp 高調波発生レーザ装置
US5943351A (en) * 1997-05-16 1999-08-24 Excel/Quantronix, Inc. Intra-cavity and inter-cavity harmonics generation in high-power lasers
US6697391B2 (en) * 2002-03-28 2004-02-24 Lightwave Electronics Intracavity resonantly enhanced fourth-harmonic generation using uncoated brewster surfaces
CN1402390A (zh) * 2002-08-13 2003-03-12 深圳市大族激光科技股份有限公司 高效率、高功率三次谐波激光产生技术
JP2005243879A (ja) * 2004-02-26 2005-09-08 Sumitomo Heavy Ind Ltd 高調波レーザビーム発生装置
CN1855648A (zh) * 2005-04-28 2006-11-01 深圳市大族激光科技股份有限公司 四次谐波固体激光产生方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108448375A (zh) * 2018-04-27 2018-08-24 国科世纪激光技术（天津）有限公司 固定脉宽腔内倍频绿光激光器以及操作方法
CN108471042A (zh) * 2018-04-27 2018-08-31 国科世纪激光技术（天津）有限公司 固定脉宽腔内倍频紫外激光器以及操作方法
CN108521071A (zh) * 2018-04-27 2018-09-11 国科世纪激光技术（天津）有限公司 不同频率固定脉宽固体激光器以及操作方法
CN108572061A (zh) * 2018-07-23 2018-09-25 中国工程物理研究院激光聚变研究中心 全口径谐波转换效率测量系统及其测量方法
CN108572061B (zh) * 2018-07-23 2023-10-13 中国工程物理研究院激光聚变研究中心 全口径谐波转换效率测量系统及其测量方法

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