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公开(公告)号：US5689363A
公开(公告)日：1997-11-18
申请号：US489402
申请日：1995-06-12
申请人： C. Brent Dane , Lloyd A. Hackel
发明人： C. Brent Dane , Lloyd A. Hackel
CPC分类号： H01S3/2341 , G02F1/37 , H01S3/0064 , H01S3/10076 , H01S3/1103 , H01S3/2383
摘要： A long pulse laser system emits 500-1000 ns quasi-rectangular pulses at 527 nm with near diffraction-limited divergence and near transform-limited bandwidth. The system consists of one or more flashlamp-pumped Nd:glass zig-zag amplifiers, a very low threshold stimulated-Brillouin-scattering (SBS) phase conjugator system, and a free-running single frequency Nd:YLF master oscillator. Completely passive polarization switching provides eight amplifier gain passes. Multiple frequency output can be generated by using SBS cells having different pressures of a gaseous SBS medium or different SBS materials. This long pulse, low divergence, narrow-bandwidth, multi-frequency output laser system is ideally suited for use as an illuminator for long range speckle imaging applications. Because of its high average power and high beam quality, this system has application in any process which would benefit from a long pulse format, including material processing and medical applications.
摘要翻译： 长脉冲激光系统在527nm处发射500-1000ns准矩形脉冲，具有近衍射受限发散和接近变换限制带宽。 该系统由一个或多个闪光灯泵浦的Nd：玻璃Z形放大器，非常低的阈值受激布里渊散射（SBS）相位共轭系统和自由运行的单频Nd：YLF主振荡器组成。 完全无源极化开关提供八个放大器增益通过。 可以通过使用具有不同压力的气体SBS介质或不同SBS材料的SBS单元来产生多频率输出。 这种长脉冲，低发散度，窄带宽，多频率输出激光系统非常适合用作长距离散斑成像应用的照明器。 由于其高平均功率和高光束质量，该系统应用于可以从长脉冲格式（包括材料处理和医疗应用）中受益的任何过程。
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公开(公告)号：US5285310A
公开(公告)日：1994-02-08
申请号：US822763
申请日：1992-01-21
CPC分类号： H01S3/235 , H01S3/025 , H01S3/06 , H01S3/08095 , H01S3/0931
摘要： A regenerative amplifier design capable of operating at high energy per pulse, for instance, from 20-100 Joules, at moderate repetition rates, for instance from 5-20 Hertz is provided. The laser amplifier comprises a gain medium and source of pump energy coupled with the gain medium; a Pockels cell, which rotates an incident beam in response to application of a control signal; an optical relay system defining a first relay plane near the gain medium and a second relay plane near the rotator; and a plurality of reflectors configured to define an optical path through the gain medium, optical relay and Pockels cell, such that each transit of the optical path includes at least one pass through the gain medium and only one pass through the Pockels cell. An input coupler, and an output coupler are provided, implemented by a single polarizer. A control circuit coupled to the Pockels cell generates the control signal in timed relationship with the input pulse so that the input pulse is captured by the input coupler and proceeds through at least one transit of the optical path, and then the control signal is applied to cause rotation of the pulse to a polarization reflected by the polarizer, after which the captured pulse passes through the gain medium at least once more and is reflected out of the optical path by the polarizer before passing through the rotator again to provide an amplified pulse.
摘要翻译： 提供能够以每秒20-100焦耳的高能量操作的再生放大器设计，以中等重复率，例如5-20赫兹。 激光放大器包括与增益介质耦合的增益介质和泵浦能量源; Pockels单元，其响应于控制信号的应用旋转入射光束; 限定靠近增益介质的第一中继平面的光中继系统和旋转器附近的第二继电器平面; 以及多个反射器，其被配置为限定通过所述增益介质，光中继器和Pockels单元的光路，使得所述光路的每个传输包括至少一个通过所述增益介质并且仅一个通过所述Pockels单元。 提供了由单个偏振器实现的输入耦合器和输出耦合器。 耦合到Pockels单元的控制电路以与输入脉冲的定时关系产生控制信号，使得输入脉冲被输入耦合器捕获，并通过光路的至少一个传输进行，然后将控制信号施加到 导致脉冲旋转到由偏振器反射的偏振，之后捕获的脉冲通过增益介质至少一次，并且在通过旋转器之前被偏振器反射出光路以再次提供放大的脉冲。
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公开(公告)号：US08339580B2
公开(公告)日：2012-12-25
申请号：US10883240
申请日：2004-06-30
IPC分类号： G01C3/08
CPC分类号： F41H13/0056 , G01S7/495
摘要： A countermeasure system for use by a target to protect against an incoming sensor-guided threat. The system includes a laser system for producing a broadband beam and means for directing the broadband beam from the target to the threat. The countermeasure system comprises the steps of producing a broadband beam and directing the broad band beam from the target to blind or confuse the incoming sensor-guided threat.
摘要翻译： 目标使用的对策系统，以防止传入传感器引导的威胁。 该系统包括用于产生宽带波束的激光系统和用于将宽带波束从目标引导到威胁的装置。 对策系统包括以下步骤：产生宽带波束并引导来自目标的宽带波束以盲目或混淆传入的传感器引导的威胁。
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4.发明授权Gain media edge treatment to suppress amplified spontaneous emission in a high power laser 有权获得媒体边缘处理以抑制大功率激光器中放大的自发发射公开(公告)号：US07894496B2
公开(公告)日：2011-02-22
申请号：US12265658
申请日：2008-11-05
IPC分类号： H01S3/00
CPC分类号： H01S3/0602 , H01S3/025 , H01S3/0606 , H01S2301/02
摘要： A novel method and apparatus for suppressing ASE and/or parasitic oscillation modes in a laser is introduced. By roughening one or more peripheral edges of a solid-state crystal or ceramic laser gain media and by bonding such edges to a predetermined electromagnetic absorbing material arranged adjacent to the entire outer surface of the peripheral edges of the roughened laser gain media, ASE, parasitic oscillation modes and/or residual pump energy can be effectively suppressed.
摘要翻译： 引入了用于抑制激光器中的ASE和/或寄生振荡模式的新颖方法和装置。 通过使固态晶体或陶瓷激光增益介质的一个或多个外围边缘粗糙化并且通过将这些边缘粘合到邻近粗糙化的激光增益介质（ASE）的周边边缘的整个外表面布置的预定电磁吸收材料 可以有效地抑制振荡模式和/或残留泵浦能量。
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公开(公告)号：US06657160B2
公开(公告)日：2003-12-02
申请号：US09771179
申请日：2001-01-25
IPC分类号： B23K2600
CPC分类号： C21D10/005 , B23K26/0732 , B23K26/0884 , B23K26/356 , C21D2221/00 , Y10T428/12 , Y10T428/12458 , Y10T428/12993
摘要： The properties of a metal piece are altered by laser peening the piece on the first side using an acoustic coupling material operatively connected to the second side and subsequently laser peening the piece on the second side using an acoustic coupling material operatively connected to the first side
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公开(公告)号：US5880873A
公开(公告)日：1999-03-09
申请号：US857988
申请日：1997-05-16
申请人： Clifford B. Dane , Lloyd A. Hackel
发明人： Clifford B. Dane , Lloyd A. Hackel
CPC分类号： G02F1/3538 , H01S3/10076
摘要： A stimulated Brillouin scattering (SBS) phase conjugate laser mirror uses a solid-state nonlinear gain medium instead of the conventional liquid or high pressure gas medium. The concept has been effectively demonstrated using common optical-grade fused silica. An energy threshold of 2.5 mJ and a slope efficiency of over 90% were achieved, resulting in an overall energy reflectivity of >80% for 15 ns, 1 um laser pulses. The use of solid-state materials is enabled by a multi-pass resonant architecture which suppresses transient fluctuations that would otherwise result in damage to the SBS medium. This all solid state phase conjugator is safer, more reliable, and more easily manufactured than prior art designs. It allows nonlinear wavefront correction to be implemented in industrial and defense laser systems whose operating environments would preclude the introduction of potentially hazardous liquids or high pressure gases.
摘要翻译： 受激布里渊散射（SBS）相位共轭激光反射镜使用固态非线性增益介质而不是传统的液体或高压气体介质。 这个概念已经使用普通的光学级熔融石英被有效地证明了。 实现2.5mJ的能量阈值和90％以上的斜率效率，导致15ns，1um激光脉冲的总能量反射率> 80％。 固态材料的使用通过多通道谐振结构来实现，该结构抑制了否则会导致SBS介质损坏的瞬态波动。 这种全固态相位共轭器比现有技术的设计更安全，更可靠，更容易制造。 它允许在工业和国防激光系统中实现非线性波前校正，其操作环境将排除引入潜在危险的液体或高压气体。
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公开(公告)号：US5612538A
公开(公告)日：1997-03-18
申请号：US373994
申请日：1995-01-17
申请人： Lloyd A. Hackel , Patrick Reichert
发明人： Lloyd A. Hackel , Patrick Reichert
IPC分类号： G01J5/06
CPC分类号： G01J5/06
摘要： A Faraday filter rejects background light from self-luminous thermal objects, but transmits laser light at the passband wavelength, thus providing an ultra-narrow optical bandpass filter. The filter preserves images so a camera looking through a Faraday filter at a hot target illuminated by a laser will not see the thermal radiation but will see the laser radiation. Faraday filters are useful for monitoring or inspecting the uranium separator chamber in an atomic vapor laser isotope separation process. Other uses include viewing welds, furnaces, plasma jets, combustion chambers, and other high temperature objects. These filters are can be produced at many discrete wavelengths. A Faraday filter consists of a pair of crossed polarizers on either side of a heated vapor cell mounted inside a solenoid.
摘要翻译： 法拉第滤光器滤除来自自发光热物体的背景光，但以通带波长传输激光，从而提供超窄光带通滤光片。 过滤器保留图像，使得通过法拉第滤镜在激光照射的热靶处的相机不会看到热辐射，但会看到激光辐射。 法拉第过滤器可用于在原子蒸气激光同位素分离过程中监测或检查铀分离器室。 其他用途包括观察焊缝，熔炉，等离子体射流，燃烧室和其他高温物体。 这些滤光片可以在许多离散的波长处产生。 法拉第滤波器由安装在螺线管内部的加热蒸汽电池两侧的一对交叉偏振器组成。
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公开(公告)号：US5239408A
公开(公告)日：1993-08-24
申请号：US948488
申请日：1992-09-22
申请人： Lloyd A. Hackel , Clifford B. Dane
发明人： Lloyd A. Hackel , Clifford B. Dane
CPC分类号： H01S3/235 , H01S3/2341 , H01S3/06 , H01S3/08095 , H01S3/093 , H01S3/10076
摘要： A regenerative laser amplifier system generates high peak power and high energy per pulse output beams enabling generation of X-rays used in X-ray lithography for manufacturing integrated circuits. The laser amplifier includes a ring shaped optical path with a limited number of components including a polarizer, a passive 90 degree phase rotator, a plurality of mirrors, a relay telescope, and a gain medium, the components being placed close to the image plane of the relay telescope to reduce diffraction or phase perturbations in order to limit high peak intensity spiking. In the ring, the beam makes two passes through the gain medium for each transit of the optical path to increase the amplifier gain to loss ratio. A beam input into the ring makes two passes around the ring, is diverted into an SBS phase conjugator and proceeds out of the SBS phase conjugator back through the ring in an equal but opposite direction for two passes, further reducing phase perturbations. A master oscillator inputs the beam through an isolation cell (Faraday or Pockels) which transmits the beam into the ring without polarization rotation. The isolation cell rotates polarization only in beams proceeding out of the ring to direct the beams out of the amplifier. The diffraction limited quality of the input beam is preserved in the amplifier so that a high power output beam having nearly the same diffraction limited quality is produced.
摘要翻译： 再生激光放大器系统产生高峰值功率和每脉冲输出光束的高能量，使得能够产生用于制造集成电路的X射线光刻中的X射线。 激光放大器包括具有有限数量的部件的环形光路，包括偏振器，无源90度相位旋转器，多个反射镜，中继望远镜和增益介质，所述部件被放置成靠近图像平面 继电器望远镜以减少衍射或相位扰动，以限制高峰值强度尖峰。 在环中，光束通过增益介质进行两次通过光路的每个转接，以增加放大器增益与损耗比。 输入到环中的波束使得环周围两遍，被转向SBS相位共轭器，并且以相等但相反的方向通过环返回到SBS相位共轭器两遍，进一步减少相位扰动。 主振荡器通过隔离单元（法拉第或普克尔斯）将光束输入，该隔离单元将光束传输到环中而无偏振旋转。 隔离单元仅在从环路出来的光束中旋转极化，以将光束引导出放大器。 输入光束的衍射限制质量保留在放大器中，从而产生具有几乎相同衍射限制质量的高功率输出光束。
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公开(公告)号：US08608590B2
公开(公告)日：2013-12-17
申请号：US12304106
申请日：2007-06-14
IPC分类号： A63B53/04
CPC分类号： A63B53/04 , A63B53/0466 , A63B60/00 , A63B2053/0408 , A63B2053/0416 , A63B2053/0445
摘要： A method of manufacturing a driver, or other types of golf club, includes inducing residual compressive stress by high intensity laser shock peening to form an array of laser shock peened impact zones on the club face. Laser pulses having irradiance greater than 4 GW/cm2, with spot size greater than 4 mm2 are used, including a pulse with on the order of 16 ns, with spot size greater than 9 mm2. Residual compressive stress of more than 400 MPa penetrating with a depth of more than 0.2 mm are imparted, without increased hardening in or damage to the face of the club. Laser shock peening a pattern that covers an interior area leaves the perimeter unpeened, inducing a stress gradient between interior area and the perimeter of the club face. Multiple layers of arrays of laser shock impact zones are applied on the club. The technology is readily applied to assembled club heads.
摘要翻译： 制造驾驶员或其他类型的高尔夫球杆的方法包括通过高强度激光冲击喷丸引起残余压缩应力，以在球杆表面上形成激光冲击硬化冲击区域阵列。 使用具有大于4GW / cm 2的光照大于4mm 2的激光脉冲，其中包括大约16ns的脉冲，光斑尺寸大于9mm 2。 施加超过400MPa的残余压应力穿透深度大于0.2mm，而不会增加对球杆表面的硬化或损坏。 激光冲击强化覆盖内部区域的图案使得外围边缘处于未硬化状态，从而在内部区域和球杆表面的周边之间引起应力梯度。 激光冲击冲击区的多层阵列应用在球杆上。 该技术易于应用于组装的球杆头。
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公开(公告)号：US08207474B2
公开(公告)日：2012-06-26
申请号：US12506530
申请日：2009-07-21
申请人： C. Brent Dane , Lloyd A. Hackel , Fritz B. Harris
发明人： C. Brent Dane , Lloyd A. Hackel , Fritz B. Harris
IPC分类号： B23K26/00
CPC分类号： H01S3/115 , C21D10/005 , C21D2221/00 , H01S3/083 , H01S3/10038 , H01S3/10076 , H01S3/105 , H01S3/107 , H01S3/1305 , H01S3/137 , H01S3/2333
摘要： A method of operating a laser to obtain an output pulse having a single wavelength, comprises inducing an intracavity loss into a laser resonator having an amount that prevents oscillation during a time that energy from the pump source is being stored in the gain medium. Gain is built up in the gain medium with energy from the pump source until formation of a single-frequency relaxation oscillation pulse in the resonator. Upon detection of the onset of the relaxation oscillation pulse, the intracavity loss is reduced, such as by Q-switching, so that the built-up gain stored in the gain medium is output from the resonator in the form of an output pulse at a single frequency. An electronically controllable output coupler is controlled to affect output pulse characteristics. The laser acts a master oscillator in a master oscillator power amplifier configuration. The laser is used for laser peening.
摘要翻译： 一种操作激光以获得具有单一波长的输出脉冲的方法，包括在具有在来自泵浦源的能量被存储在增益介质中的时间内引起具有防止振荡的量的激光谐振器的腔内损耗。 增益在增益介质中由泵浦源产生能量，直到在谐振器中形成单频弛豫振荡脉冲。 在检测到弛豫振荡脉冲的开始时，例如通过Q开关来减小腔内损耗，使得存储在增益介质中的累积增益以输出脉冲的形式从谐振器输出 单频。 控制电子可控输出耦合器以影响输出脉冲特性。 激光器以主振荡器功率放大器配置为主振荡器。 激光用于激光喷丸处理。
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