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    High power laser employing an unstable resonator
    1.
    发明授权
    High power laser employing an unstable resonator 失效
    使用不稳定谐振器的大功率激光器

    公开(公告)号：US4310808A

    公开(公告)日：1982-01-12

    申请号：US77308

    申请日：1979-09-20

    申请人： Robert L. Byer ,  Richard L. Herbst

    发明人： Robert L. Byer ,  Richard L. Herbst

    IPC分类号： H01S3/08 ,  H01S3/098 ,  H01S3/11 ,  H01S3/115 ,  H01S3/081

    CPC分类号： H01S3/08036 ,  H01S3/08081 ,  H01S3/0931 ,  H01S3/115

    摘要： The high power laser includes a high gain medium (>80%) such as a lightly doped Nd:YAG rod contained within an unstable optical resonator of the type wherein power flows outward from the optical axis of the resonator. The output beam is coupled out of the resonator by means of a coupling device having a high coupling factor (>55% of the circulating power inside the optical resonator) and in a preferred embodiment the coupling factor is as high as 80-90%. The optical resonator is preferably a confocal resonator employing one concave mirror and one convex mirror. The convex mirror forms the output coupling device for providing a high degree of diffraction output coupling around the periphery of the output mirror. The output beam is collimated in the region of the output mirror. The curvatures of the two mirrors forming the optical resonator are dimensioned to take into account the positive focusing lens effect of the high gain medium produced by a transverse thermal gradient in the high gain medium encountered in use when pumped by flash lamps. The laser is Q-switched by means of a linear polarizer and a pulsed KD*P quarter wave plate. The output beam has 25 megawatts of peak power with a pulse width of 10 nanoseconds, a pulse repetition rate of 10 pulses per second. The output beam has a power density of 75 megawatts per square centimeter.

    摘要翻译： 大功率激光器包括高增益介质（> 80％），例如包含在其中功率从谐振器的光轴向外流动的类型的不稳定光谐振器内的轻掺杂Nd：YAG棒。 输出光束通过具有高耦合因子（光谐振器内的循环功率的大于55％）的耦合装置耦合到谐振器外，并且在优选实施例中，耦合因子高达80-90％。 光谐振器优选为采用一个凹面镜和一个凸面镜的共焦共振器。 凸镜形成输出耦合装置，用于提供耦合在输出反射镜周边的高度的衍射输出。 输出光束在输出镜的区域被准直。 形成光学谐振器的两个反射镜的曲率被设计成考虑到当由闪光灯泵浦时在使用中遇到的高增益介质中由横向热梯度产生的高增益介质的正聚焦透镜效应。 激光器通过线性偏振器和脉冲KD * P四分之一波片进行Q开关。 输出光束具有25兆瓦的峰值功率，脉冲宽度为10纳秒，脉冲重复频率为每秒10个脉冲。 输出光束的功率密度为75兆瓦每平方厘米。

    Tunable infrared source employing Raman mixing
    2.
    发明授权
    Tunable infrared source employing Raman mixing 失效
    可调红外源采用拉曼混合

    公开(公告)号：US4213060A

    公开(公告)日：1980-07-15

    申请号：US768275

    申请日：1977-02-14

    申请人： Robert L. Byer ,  Richard L. Herbst

    发明人： Robert L. Byer ,  Richard L. Herbst

    IPC分类号： H01S3/108 ,  H01S3/30 ,  H03F7/00

    CPC分类号： H01S3/305 ,  H01S3/1083

    摘要： A tunable source of infrared radiation is obtained by irradiating an assemblage of Raman active gaseous atoms or molecules with a high intensity pumping beam of coherent radiation at a pump frequency .omega..sub.p to stimulate the generation of Stokes wave energy at a Stokes frequency .omega..sub.s and to stimulate the Raman resonant mode at the Raman mode frequency .omega..sub.R within the irradiated assemblage where the pump frequency .omega..sub.p minus the Stokes frequency .omega..sub.s is equal to the Raman mode frequency .omega..sub.R. The stimulated assemblage is irradiated with a tunable source of coherent radiation at a frequency .omega..sub.i to generate the output infrared radiation of the frequency .omega..sub.0 which is related to the Raman mode frequency .omega..sub.R and the input wave .omega..sub.i by the relation .omega..sub.0 =.omega..sub.i .+-..omega..sub.R. In one embodiment the interaction between the pump wave energy .omega..sub.p and the tunable input wave energy .omega..sub.i is collinear and the ratio of the phase velocity mismatch factor .DELTA.k to the electric field exponential gain coefficient T is within the range of 0.1 to 5. In another embodiment the pump wave energy .omega..sub.p and the tunable input wave energy .omega..sub.i have velocity vectors k.sub.p and k.sub.i which cross at an angle to each other to compensate for phase velocity mismatches in the medium. In another embodiment, the Stokes wave energy .omega..sub.s is generated by pump energy .omega..sub.p in a first Raman cell and .omega..sub.s, .omega..sub.i and .omega..sub.p are combined in a second Raman mixing cell to produce the output at .omega..sub.i.

    摘要翻译： 红外辐射的可调谐源是通过以泵浦频率ω-p照射具有高强度相干辐射的高强度泵浦光束的拉曼活性气体原子或分子的组合来刺激斯托克斯波斯能量在斯托克斯频率ω下的产生，并且 在经过照射的组合中的拉曼模式频率ωR处刺激拉曼谐振模式，其中泵浦频率ω-p减去斯托克斯频率ωs等于拉曼模式频率ωR。用可调谐相干辐射源照射被激励的组合 在频率ωi处产生与拉曼模式频率ωR相关的频率ω0的输出红外辐射，并且通过关系ω0 =ωi +/-ωR，输入波ωi。在一个实施例中，相互作用 在泵波能量ω和可调输入波能量ωi之间是共线的，并且相位速度失配因子DELTA k与 电场指数增益系数T在0.1至5的范围内。在另一个实施例中，泵波能量ω和可调谐输入波能量ωi具有彼此成角度交叉的速度矢量kp和ki，以补偿 介质中的相速度失配。 在另一个实施例中，斯托克斯波能量ω由第一拉曼单元中的泵浦能量ωp产生，并且ωs，ωi和ωp在第二拉曼混合单元中组合以产生ωi的输出。

    Laser-driven deflection arrangements and methods involving charged particle beams
    3.
    发明授权
    Laser-driven deflection arrangements and methods involving charged particle beams 有权
    激光驱动偏转装置和涉及带电粒子束的方法

    公开(公告)号：US07994472B2

    公开(公告)日：2011-08-09

    申请号：US12485616

    申请日：2009-06-16

    申请人： Tomas Plettner ,  Robert L. Byer

    发明人： Tomas Plettner ,  Robert L. Byer

    IPC分类号： G21K1/08 ,  H01J37/26

    CPC分类号： H05H7/06

    摘要： Systems, methods, devices and apparatus are implemented for producing controllable charged particle beams. In one implementation, an apparatus provides a deflection force to a charged particle beam. A source produces an electromagnetic wave. A structure, that is substantially transparent to the electromagnetic wave, includes a physical structure having a repeating pattern with a period L and a tilted angle α, relative to a direction of travel of the charged particle beam, the pattern affects the force of the electromagnetic wave upon the charged particle beam. A direction device introduces the electromagnetic wave to the structure to provide a phase-synchronous deflection force to the charged particle beam.

    摘要翻译： 实施用于制造可控带电粒子束的系统，方法，装置和装置。 在一个实施方案中，装置向带电粒子束提供偏转力。 源产生电磁波。 对电磁波基本透明的结构包括具有相对于带电粒子束的行进方向具有周期L和倾斜角α的重复图案的物理结构，该图案影响电磁力 在带电粒子束上波动。 方向装置将电磁波引入结构，以向带电粒子束提供相位同步偏转力。

    Mitigation of photodarkening to achieve laser oscillation and amplification with highly doped fibers
    4.
    发明授权
    Mitigation of photodarkening to achieve laser oscillation and amplification with highly doped fibers 失效
    减轻光暗化实现激光振荡和高掺杂光纤放大

    公开(公告)号：US07477672B2

    公开(公告)日：2009-01-13

    申请号：US11508550

    申请日：2006-08-22

    申请人： Supriyo Sinha ,  Michel J. F. Digonnet ,  Robert L. Byer ,  Jens Limpert

    发明人： Supriyo Sinha ,  Michel J. F. Digonnet ,  Robert L. Byer ,  Jens Limpert

    IPC分类号： H01S3/30 ,  H01S3/03

    CPC分类号： H01S3/0675 ,  H01S3/06716 ,  H01S3/06791 ,  H01S3/07 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/1055

    摘要： Photodarkening in active fiber or waveguide devices (e.g. lasers, amplifiers, and incoherent sources such as ASE sources) can be reduced by altering the dopant concentration along the length of the doped fiber. A fiber or waveguide device includes two or more intentionally doped fiber or waveguide sections having different concentrations of one or more dopants. The dopants provide optical gain responsive to pump radiation provided to the fiber device by a pump source. A first optical intensity in a first of the fiber or waveguide sections is greater than a second optical intensity in a second of the fiber or waveguide sections. A first dopant concentration in the first fiber or waveguide section is lower than a second dopant concentration in the second fiber or waveguide section. Thus the dopant concentration is reduced in sections of the fiber or waveguide device having a higher optical intensity. The optical intensity can be due to pump radiation and/or signal radiation. Reduced dopant concentration in regions of high optical intensity reduces photodarkening.

    摘要翻译： 通过改变沿着掺杂光纤的长度的掺杂剂浓度，可以减少有源光纤或波导器件（例如，激光器，放大器和非相干源，例如ASE源）中的光标。 光纤或波导器件包括具有不同浓度的一种或多种掺杂剂的两个或更多个有意掺杂的光纤或波导部分。 掺杂剂通过泵浦源提供响应于提供给光纤装置的泵浦辐射的光学增益。 第一光纤或波导部分中的第一光强度大于第二光纤或波导部分中的第二光强度。 第一光纤或波导部分中的第一掺杂剂浓度低于第二光纤或波导部分中的第二掺杂剂浓度。 因此，具有较高光强度的光纤或波导器件的部分的掺杂剂浓度降低。 光强度可能是由于泵浦辐射和/或信号辐射。 高光强度区域的掺杂剂浓度降低会降低光暗化。

    High power continuous wave injection-locked solid state laser
    8.
    发明授权
    High power continuous wave injection-locked solid state laser 失效
    大功率连续波注入锁定固态激光器

    公开(公告)号：US5027360A

    公开(公告)日：1991-06-25

    申请号：US538097

    申请日：1990-06-13

    申请人： C. David Nabors ,  Robert L. Byer

    发明人： C. David Nabors ,  Robert L. Byer

    IPC分类号： H01S3/139 ,  H01S3/23

    CPC分类号： H01S3/10092 ,  H01S3/1398 ,  H01S3/083

    摘要： A high power injection-locked laser system (10) is disclosed which includes master and slave lasers (12, 14) both of which are solid state lasers having continuous wave outputs. The slave laser has an output power at least ten times greater than the master laser. In the preferred embodiment, the slave laser is at least one-hundred times as powerful as the master laser. In accordance with the subject invention, a servo-loop control system is used to maintain the injection locked condition. A discriminant signal is generated that is indicative of drift in the slave laser cavity. The discriminant signal is used adjust the length of the slave laser cavity to maintain the locked condition.

    摘要翻译： 公开了一种高功率注入锁定激光系统（10），其包括主激光器和从属激光器（12,14），二者都是具有连续波输出的固态激光器。 从激光器的输出功率比主激光器大至少十倍。 在优选实施例中，从属激光器是主激光器的至少一倍。 根据本发明，使用伺服回路控制系统来维持喷射锁定状态。 产生指示从激光器腔中的漂移的判别信号。 使用判别信号调节从激光腔的长度以维持锁定状态。

    Moving slab laser
    9.
    发明授权
    Moving slab laser 失效
    移动平板激光

    公开(公告)号：US4833682A

    公开(公告)日：1989-05-23

    申请号：US101138

    申请日：1987-09-24

    申请人： Robert L. Byer ,  Santanu Basu

    发明人： Robert L. Byer ,  Santanu Basu

    IPC分类号： H01S3/042 ,  H01S3/06 ,  H01S3/092

    CPC分类号： H01S3/0606 ,  H01S3/042 ,  H01S3/092 ,  H01S3/102 ,  H01S3/1026

    摘要： A moving slab laser includes a slab carriage driven to-and-fro along a precise rectilinear reciprocal path by a liner motor under the control of a computer. The reciprocal motion of the slab is precisely guided by cross roller ways or ball bushing bearings to minimize non-rectilinear motion-dependent output beam steering effects. In one embodiment, the lasant slab is separated into a pair of axially spaced geometrically identical portions which are reciprocated in opposite directions to cancel motion direction dependent beam steering effects.

    摘要翻译： 移动板坯激光器包括在计算机的控制下通过线性电动机沿着精确的直线往复路径来回驱动的板式支架。 板坯的往复运动由交叉滚子路径或滚珠轴承精确地引导，以最小化非直线运动相关的输出波束转向效应。 在一个实施例中，惰性板坯被分离成一对轴向间隔开的几何相同的部分，它们在相反的方向上往复运动以消除与方向相关的光束转向效应。

    Stable single axial mode Q switched laser oscillator with injection locking
    10.
    发明授权
    Stable single axial mode Q switched laser oscillator with injection locking 失效
    稳定的单轴模式Q开关激光振荡器具有注入锁定

    公开(公告)号：US4455657A

    公开(公告)日：1984-06-19

    申请号：US493954

    申请日：1983-05-12

    申请人： Robert L. Byer

    发明人： Robert L. Byer

    IPC分类号： H01S3/098 ,  H01S3/23

    CPC分类号： H01S3/08031 ,  H01S3/10092 ,  H01S3/08081

    摘要： A stable high gain laser includes a Q switched multiple axial mode high gain oscillator, an oscillator for generating a stable optical wave at a first frequency, the first frequency being within the band of the multiple modes of operation, and a coupler for injecting the stable optical wave into the high gain oscillator whereby the axial mode nearest to the frequency of the injected wave selects a single axial mode and through gain saturation suppresses other modes of the high gain oscillator.

    摘要翻译： 稳定的高增益激光器包括Q开关多轴模式高增益振荡器，用于在第一频率产生稳定光波的振荡器，第一频率在多种工作模式的频带内，以及耦合器，用于将稳定的 光波进入高增益振荡器，由此最接近注入波的频率的轴向模式选择单个轴向模式，并且通过增益饱和度抑制高增益振荡器的其他模式。