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公开(公告)号：US5935467A
公开(公告)日：1999-08-10
申请号：US856378
申请日：1997-05-14
CPC分类号： G02F1/3501 , G02F1/0147 , G02F1/37 , G02F2001/3505 , G02F2001/3546
摘要： An oven for heating a crystal for nonlinear frequency conversion of a laser beam. A grasping device resiliently grasps together the first and second sides of the crystal while allowing for generally unrestricted thermal expansion of the crystal. A heater element and a temperature sensor are each supported by the grasping device and are each in thermal contact with the crystal. A temperature controller is connected to the heater element and the temperature sensor.
摘要翻译： 用于加热用于激光束的非线性频率转换的晶体的烤箱。 夹持装置将晶体的第一和第二侧弹性地夹持在一起，同时允许晶体的大致无限制的热膨胀。 加热器元件和温度传感器各自由抓取装置支撑并且各自与晶体热接触。 温度控制器连接到加热器元件和温度传感器。
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公开(公告)号：US5930282A
公开(公告)日：1999-07-27
申请号：US858103
申请日：1997-05-19
IPC分类号： H01S3/0941 , H01S3/09
CPC分类号： H01S3/0941 , H01S3/025 , H01S3/0606 , H01S3/094084 , H01S3/1022
摘要： An exemplary laser apparatus comprises an amplification medium which amplifies a coherent beam passing through the amplification medium, a pump which provides energy to the amplification medium, a tunnel having a first end proximate to the pump and a second end proximate to the amplification medium, wherein the energy provided by the pump passes through the tunnel en route to the amplification medium, and a moveable member for adjusting a spatial distribution of the energy provided to the amplification medium by the pump. The moveable member typically comprises a flat, reflecting strip or flap which redirects a portion of the energy of the pump beam to a peripheral region of the amplification medium. The angular and translational position of the flap is adjustable on line so that the pump distribution can be adjusted while the laser is running to reduce observed optical distortions caused by heating of the amplification medium.
摘要翻译： 示例性激光装置包括放大通过放大介质的相干光束的放大介质，向放大介质提供能量的泵，具有靠近泵的第一端的隧道和靠近放大介质的第二端，其中 由泵提供的能量通过隧道到达放大介质，以及可移动构件，用于调节由泵提供给放大介质的能量的空间分布。 可移动构件通常包括平坦的反射条或翼片，其将泵浦光束的能量的一部分重定向到放大介质的外围区域。 翼片的角度和平移位置可以在线调节，从而可以在激光运行时调节泵的分布，以减少由加热放大介质引起的观察到的光学失真。
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公开(公告)号：US5828690A
公开(公告)日：1998-10-27
申请号：US574015
申请日：1995-12-18
摘要： A laser head includes a body having opposite ends, and a bore extending axially therethrough for defining a reflector. The body is a unitary member circumferentially around the reflector. The reflector includes a center cavity for coaxially receiving a laser rod, and a plurality of lateral cavities disposed parallel to and extending radially outwardly from the center cavity for receiving flashlamps for optically pumping the laser rod. Reflector and lamp endcaps are removably mounted to the body for mounting the lamps and rod, and allowing individual replacement thereof.
摘要翻译： 激光头包括具有相对端部的主体，以及轴向延伸穿过其中以限定反射器的孔。 身体是围绕反射器周向的整体构件。 反射器包括用于同轴地接收激光棒的中心腔和与中心空腔平行并从其径向向外延伸的多个侧向空腔，用于接收用于光学泵浦激光棒的闪光灯。 反射器和灯端盖可拆卸地安装到主体上，用于安装灯和杆，并允许单独更换。
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公开(公告)号：US06197133B1
公开(公告)日：2001-03-06
申请号：US09252620
申请日：1999-02-16
IPC分类号： C21D109
CPC分类号： C21D10/005 , B23K26/0622
摘要： A target is laser shock peened by directing against an ablative coating thereon a laser beam pulse having a fluence, duration, and corresponding peak power effective for ablating the coating to form a plasma and shock wave therein. The plasma is confined adjacent the target to plastically deform the target by the shock wave to develop residual compressive stress therein. The pulse has a duration less than ten nanoseconds and a corresponding peak power for increasing coupling efficiency between the pulse and plasma.
摘要翻译： 目标是通过对其上的烧蚀涂层进行激光冲击而进行激光冲击，激光束脉冲具有有效用于消融涂层以在其中形成等离子体和冲击波的注量，持续时间和相应的峰值功率。 等离子体被限制在目标附近，通过冲击波使靶材塑性变形，从而在其中形成残留压应力。 脉冲具有小于10纳秒的持续时间和用于提高脉冲和等离子体之间的耦合效率的相应的峰值功率。
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公开(公告)号：US5730811A
公开(公告)日：1998-03-24
申请号：US576822
申请日：1995-12-21
CPC分类号： H01S3/1075 , B23K26/0622 , C21D10/005 , C21D7/06 , H01S3/1103 , H01S3/1127 , H01S3/115 , H01S3/2308 , Y10S148/903
摘要： A laser shock peening apparatus includes a cavity dumping laser oscillator including in optical serial alignment a first mirror, a Pockels cell, a polarizer, a laser rod, and a second mirror defining a cavity having an optical length between the mirrors. The laser rod is optically pumped to generate a laser beam in the cavity, and the Pockels cell has selective wave retardation to allow the beam to oscillate between the mirrors and increase energy therein, followed in turn by dumping the beam into a laser amplifier. The laser amplifier directs the amplified pulse at a target for laser shock peening thereof. The cavity length is selected to develop a substantially square-wave laser pulse for temporally shaping the resulting pressure pulse at the target.
摘要翻译： 激光冲击硬化装置包括：腔体倾倒激光振荡器，其包括光学串行对准，第一反射镜，普克尔斯单元，偏振器，激光棒和限定在反射镜之间具有光学长度的空腔的第二反射镜。 激光棒被光学泵浦以在空腔中产生激光束，并且Pockels单元具有选择性波延迟，以允许光束在反射镜之间振荡并且增加其中的能量，然后将光束倾倒到激光放大器中。 激光放大器将放大的脉冲引导到目标处进行激光冲击喷丸处理。 选择腔长度以形成基本方波激光脉冲，用于在目标处暂时成形所得到的压力脉冲。
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公开(公告)号：US07313299B2
公开(公告)日：2007-12-25
申请号：US11371891
申请日：2006-03-09
IPC分类号： G02B6/26
摘要： A system for transmitting the spatial profile of laser beams with particular applicability to coherently combine laser beams into one beam. The system includes a tapered waveguide with an inlet and outlet at ends of two waveguide elements each having a reflective surface facing into the waveguide. The reflective surfaces are non-parallel such that the inlet height is different than the outlet height, e.g., inlet height greater than outlet height. The system includes a beam input assembly controlling phases of laser beams input at the waveguide inlet, and the phases of the beams are locked to a substantially single phase. The waveguide length is selected to produce at the waveguide outlet a coherently combined laser beam from the input beams. The beam input assembly includes a laser beam source, a beam splitter generating lower power beams from source beams, and phase adjusters for controlling the phase of each input beam.
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公开(公告)号：US6002706A
公开(公告)日：1999-12-14
申请号：US1231
申请日：1997-12-30
CPC分类号： G01J11/00 , B23K26/702
摘要： A method of controlling the size of a laser beam comprises the steps of generating the laser beam with a laser, focusing the laser beam, directing the laser beam to a target, directing a portion of the laser beam to an optical detector which generates a signal representative of a fluence distribution of the laser beam, and adjusting a focal point of the laser beam based on the measured fluence distribution to control the size of the laser beam on the target. The method can be carried out with an apparatus which comprises a beam splitter which divides the laser beam into a first portion and a second portion, a lens which focuses the first portion of the laser beam for incidence on a target, a detector which receives the second portion of the laser beam and which generates a signal representative of a spatial energy distribution of the laser beam, a digitizer which digitizes the signal from the detector, a data analyzer which receives the digitized signal from the digitizer and which calculates a fluence distribution of the laser beam, and a lens controller for adjusting a position of the lens with respect to the target based on the fluence distribution.
摘要翻译： 控制激光束尺寸的方法包括以下步骤：用激光产生激光束，聚焦激光束，将激光束引导到目标，将激光束的一部分引导到产生信号的光学检测器 代表激光束的注量分布，以及基于所测量的通量分布来调整激光束的焦点，以控制激光束在靶上的尺寸。 该方法可以用包括将激光束分成第一部分和第二部分的分束器的装置进行，将聚焦激光束的第一部分以将其入射到目标上的透镜，接收 激光束的第二部分，并且其产生表示激光束的空间能量分布的信号，数字化仪，其将来自检测器的信号数字化;数据分析器，其从数字化仪接收数字化信号，并且计算数字化分布 激光束和用于基于注量分布来调整透镜相对于目标的位置的透镜控制器。
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公开(公告)号：US06670577B2
公开(公告)日：2003-12-30
申请号：US09965320
申请日：2001-09-28
申请人： Phillip Randall Staver , William Taylor Lotshaw , Michael Francis X Gigliotti, Jr. , Josef Robert Unternahrer , Robert Snee Gilmore , Thomas James Batzinger
发明人： Phillip Randall Staver , William Taylor Lotshaw , Michael Francis X Gigliotti, Jr. , Josef Robert Unternahrer , Robert Snee Gilmore , Thomas James Batzinger
IPC分类号： B23K2600
CPC分类号： C21D10/005 , B23K26/0619 , B23K26/067
摘要： A method for laser shock peening a surface is disclosed. A laser beam pulse from a laser apparatus is produced. The laser pulse has a cross-section taken perpendicular to the laser beam, a fluence profile across the cross-section. The pulse against an area on said surface. The fluence profile is controlled such that process induced defects are reduced.
摘要翻译： 公开了一种激光冲击硬化表面的方法。 产生来自激光装置的激光束脉冲。 激光脉冲具有垂直于激光束的横截面，横截面上的注量分布。 针对所述表面上的区域的脉冲。 控制注量分布，从而减少工艺引起的缺陷。
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9.发明授权公开(公告)号：US06404787B1
公开(公告)日：2002-06-11
申请号：US09518200
申请日：2000-03-03
IPC分类号： H01S310
CPC分类号： H01S3/0057 , H01S3/10
摘要： A method and apparatus of selecting a predetermined number of pulses from a stream of laser pulses is described. The number of pulses is determined by the operator from the laser pulse repetition rate and the desired number of pulses. The invention comprises synchronizing the laser pulses with the start of the pulse selection, allowing the predetermined count of laser pulses to pass a blocking mechanism; and finally blocking the pulses after the pulses have passed.
摘要翻译： 描述了从激光脉冲流中选择预定数量的脉冲的方法和装置。 脉冲数由操作者根据激光脉冲重复率和期望脉冲数确定。 本发明包括使激光脉冲与脉冲选择的开始同步，允许激光脉冲的预定计数通过阻塞机构; 最后在脉冲通过后阻塞脉冲。
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公开(公告)号：US5987042A
公开(公告)日：1999-11-16
申请号：US961584
申请日：1997-10-31
CPC分类号： H01S3/0057 , B23K26/0069 , B23K26/0622
摘要： The invention relates to a method and apparatus for shaping a laser pulse. The method comprises the steps of generating a laser pulse with a laser, opening an optical switch to allow the laser pulse to pass through the optical switch, determining a first reference time point with respect to the laser pulse, determining a second reference time point with respect to the opening of the optical switch, and adjusting an opening time of the optical switch based on the first and second reference time points to shape the laser pulse. The method may be carried out with an apparatus which comprises a laser which generates the laser pulse, a first optical detector which detects the laser pulse and generates a first signal representing the laser pulse, an optical switch through which the laser pulse passes, a second optical detector which detects the laser pulse after the laser pulse has passed through the optical switch, and which generates a second signal representing the laser pulse, a computer which receives the first and second signals and which calculates a delay period based on the first and second signals, and a pulse generator which receives the delay period from the computer and which generates a pulse delayed by the delay period to open the optical switch.
摘要翻译： 本发明涉及一种用于整形激光脉冲的方法和装置。 该方法包括以下步骤：用激光产生激光脉冲，打开光学开关以允许激光脉冲通过光学开关，确定相对于激光脉冲的第一参考时间点，确定第二参考时间点与 相对于光开关的打开，以及基于第一和第二参考时间点调整光开关的打开时间，以形成激光脉冲。 该方法可以由包括产生激光脉冲的激光器的装置，检测激光脉冲并产生表示激光脉冲的第一信号的第一光学检测器，激光脉冲通过的光开关，第二 光检测器，其在激光脉冲通过光开关之后检测激光脉冲，并且产生表示激光脉冲的第二信号;计算机，其接收第一和第二信号，并且基于第一和第二信号计算延迟周期 信号和脉冲发生器，其从计算机接收延迟周期，并产生延迟延迟周期的脉冲以打开光开关。
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