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公开(公告)号：US4088965A
公开(公告)日：1978-05-09
申请号：US704180
申请日：1976-07-12
IPC分类号： H01S3/0971 , H01S3/0975 , H01S3/223 , H01S3/00
CPC分类号： H01S3/0975 , H01S3/09713 , H01S3/223
摘要： A helium-nitrogen laser is described in which energy in the visible range is emitted as a result of charge transfer reaction between helium ions and nitrogen molecules. The helium and nitrogen are present in a gas mixture at several atmospheres pressure, with a nitrogen partial pressure on the order of less than one percent. Prior to applying a discharge pulse to the gas mixture at the high pressure by means of a pair of main discharge electrodes, the gas mixture is preionized to prevent arcing when the discharge pulse is applied. The preionization is achieved by the application of a high voltage across a pair of secondary electrodes which are spaced apart in a direction perpendicular to the spacing direction of the main discharge electrodes and the longitudinal axis of the space in which the gas mixture is contained. Feedback, by means of a pair of appropriately spaced mirrors, is provided, to produce coherent energy pulses at a selected wavelength.
摘要翻译： 描述了氦氮激光器，其中由于氦离子和氮分子之间的电荷转移反应，发射可见光范围内的能量。 氦气和氮气在几个大气压下的气体混合物中存在，氮气分压小于1％。 在通过一对主放电电极在高压下向气体混合物施加放电脉冲之前，先将气体混合物预放电以防止在施加放电脉冲时产生电弧。 通过在垂直于主放电电极的间隔方向的间隔方向和包含气体混合物的空间的纵向轴线间隔开的一对次级电极施加高电压来实现预电离。 通过一对适当间隔的反射镜提供反馈，以产生所选波长的相干能量脉冲。
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公开(公告)号：US4275317A
公开(公告)日：1981-06-23
申请号：US23485
申请日：1979-03-23
申请人： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch , James B. Laudenslager , Thomas J. Pacala
发明人： Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch , James B. Laudenslager , Thomas J. Pacala
CPC分类号： H01S3/097 , H03K17/80 , H03K2217/0036
摘要： A saturable inductor switch for compressing the width and sharpening the rise time of high voltage pulses from a relatively slow rise time, high voltage generator to an electric discharge gas laser (EDGL). The switch also provides a capability for efficient energy transfer from a high impedance primary source to an intermediate low impedance laser discharge network. More specifically, a saturable inductor switch is positioned with respect to a capacitive storage device, such as a coaxial cable, so that when a charge build-up in the storage device reaches a predetermined level, saturation of the switch inductor releases or switches energy stored in the capacitive storage device to the EDGL. Also disclosed are cascaded saturable inductor switches for providing output pulses having rise times of less than ten nanoseconds as required for efficient excitation of EDGL's, the pulse rise time being determined by the thickness of a high permeability material forming the saturable inductor switch. In addition, a technique for magnetically biasing the saturable inductor switch is disclosed so that only pulses from a pulse generator having one polarity are passed and pulses having the other polarity are blocked, thereby improving the lifetime of electrical components that are sensitive to voltage reversals.
摘要翻译： 一种可饱和电感开关，用于压缩宽度，并将高电压脉冲的上升时间从相对较慢的上升时间，高电压发生器到放电气体激光器（EDGL）进行锐化。 该开关还提供了从高阻抗初级源到中间低阻抗激光放电网络的有效能量传输的能力。 更具体地，可饱和电感器开关相对于诸如同轴电缆的电容性存储装置定位，使得当存储装置中的电荷积聚达到预定水平时，开关电感器的饱和度释放或切换存储的能量 在电容式存储设备中进行EDGL。 还公开了级联可饱和电感器开关，用于提供具有小于10纳秒的上升时间的输出脉冲，用于EDGL的有效激发所需的脉冲上升时间由形成可饱和电感器开关的高磁导率材料的厚度确定。 此外，公开了用于对可饱和电感器开关进行磁偏置的技术，使得仅来自具有一个极性的脉冲发生器的脉冲通过，并且具有另一极性的脉冲被阻挡，从而提高对电压反转敏感的电气部件的寿命。
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公开(公告)号：US5412682A
公开(公告)日：1995-05-02
申请号：US220969
申请日：1994-03-31
IPC分类号： H01S3/03
CPC分类号： H01S3/03
摘要： A laser head comprising a tube having a wall with the configuration of a hollow cylinder. A first ring flange extends radially generally outwardly of the tube wall at one end and is connected to the tube by a single continuous weld. A second plate flange is disposed at the same end and extends generally axially of the first flange. The first flange is coupled to the second flange and sandwiches a metal gasket therebetween to form a pressure seal. An electrode assembly is mounted to the second plate flange and at least one high voltage discharge feed extends through the wall of the tube to energize the electrode assembly. The tube is formed of a homogeneous metal that is free of any surface plating and is less reactive with Halogen gas than pure aluminum. In an associated method, the interior surface of the tube is polished to reduce the surface area and inhibit the entrapment of water vapor.
摘要翻译： 一种激光头，其包括具有中空圆柱体构型的壁的管。 第一环凸缘在一端径向大致向外延伸到管壁的外侧，并通过单个连续焊接与管连接。 第二板凸缘设置在同一端并大致沿第一凸缘的轴向延伸。 第一凸缘联接到第二凸缘并夹在其间的金属垫圈以形成压力密封。 电极组件安装到第二板凸缘上，并且至少一个高压放电进料延伸穿过管的壁以激励电极组件。 管由不含任何表面电镀的均质金属形成，并且与纯铝相比，卤素气体的反应性较低。 在相关联的方法中，管的内表面被抛光以减少表面积并抑制水蒸汽的截留。
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4.发明授权Apparatus and method for optically controlling the output energy of a pulsed laser source 失效用于光学地控制脉冲激光源的输出能量的装置和方法
公开(公告)号：US5383199A
公开(公告)日：1995-01-17
申请号：US909054
申请日：1992-07-02
CPC分类号： A61B18/20 , H01S3/005 , A61B2018/00636
摘要： Apparatus for optically controlling the output energy of a pulsed laser source comprising a laser producing a plurality of laser pulses in a laser beam. An optical attenuator is disposed in the laser beam to attenuate the energy in the laser beam to provide an attenuated laser beam, and a pick-off is provided for sensing the energy in the attenuated laser beam. A controller is coupled to the pick-off for controlling the optical attenuator to vary the energy in the attenuated laser beam to thereby vary the output fluence from the apparatus.
摘要翻译： 用于光学地控制脉冲激光源的输出能量的装置，包括在激光束中产生多个激光脉冲的激光。 光学衰减器设置在激光束中以衰减激光束中的能量以提供衰减的激光束，并且提供用于感测衰减的激光束中的能量的传感器。 控制器耦合到拾取器，用于控制光衰减器以改变衰减的激光束中的能量，从而改变来自设备的输出注量。
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公开(公告)号：US4677636A
公开(公告)日：1987-06-30
申请号：US790594
申请日：1985-10-23
CPC分类号： H01S3/09716 , H01S3/0057 , H01S3/073 , H01S3/2366
摘要： A multiple pulse electric discharge gas laser system is described in which a plurality of pulsed electric discharge gas lasers are supported in a common housing. Each laser is supplied with excitation pulses from a separate power supply. A controller, which may be a microprocessor, is connected to each power supply for controlling the application of excitation pulses to each laser so that the lasers can be fired simultaneously or in any desired sequence. The output light beams from the individual lasers may be combined or utilized independently, depending upon the desired application. The individual lasers may include multiple pairs of discharge electrodes with a separate power supply connected across each electrode pair so that multiple light output beams can be generated from a single laser tube and combined or utilized separately.
摘要翻译： 描述了一种多脉冲放电气体激光器系统，其中多个脉冲放电气体激光器被支撑在公共壳体中。 每个激光器都提供有来自独立电源的激励脉冲。 可以是微处理器的控制器连接到每个电源，以控制对每个激光器的激励脉冲的应用，使得激光器可以同时或以任何期望的顺序被激发。 取决于所需的应用，来自各个激光器的输出光束可以被独立地组合或利用。 单个激光器可以包括多对放电电极，其具有连接在每个电极对上的单独的电源，使得可以从单个激光管产生多个光输出光束并单独组合或使用。
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