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    Monolithic phasematched laser harmonic generator
    1.
    发明授权
    Monolithic phasematched laser harmonic generator 失效
    单片相位激光谐波发生器

    公开(公告)号：US4731787A

    公开(公告)日：1988-03-15

    申请号：US924746

    申请日：1986-10-30

    申请人： Tso Y. Fan ,  Robert L. Byer

    发明人： Tso Y. Fan ,  Robert L. Byer

    IPC分类号： H01S3/06 ,  H01S3/109 ,  H01S5/06 ,  H01S3/10

    CPC分类号： H01S3/109 ,  H01S3/061 ,  H01S3/0615 ,  H01S3/0627 ,  H01S3/0815 ,  H01S3/1095

    摘要： A monolithic phasematched harmonic generator is obtained by optically pumping an optically nonlinear lasant member having reflective faces defining the monolithic optical resonator. Phasematching is achieved, in one case, by inclining a totally internally reflective face of the resonator at a proper angle relative to other faces of the resonator to angularly separate and resonate lasant waves of the proper polarization. In a second case, a clad fiber resonator of optically nonlinear lasant material has its cladding arranged to guide and thus resonate only lasant waves of the correct polarization. In a third case, the optical nonlinear coefficient of the optically nonlinear lasant material is spatially modulated with a period equal to an odd integer number of coherence lengths, of the harmonic generation process, to obtain quasi-phasematched operation. Phasematched operation improves the efficiency of the harmonic generation process.

    摘要翻译： 通过光学泵浦具有限定单片光学谐振器的反射面的光学非线性惰性元件获得单片相位谐波发生器。 在一种情况下，通过使谐振器的全内反射面以相对于谐振器的其他面的适当角度倾斜以成角度地分离和谐振适当极化的惰性波而实现相互作用。 在第二种情况下，光学非线性惰性材料的包层光纤谐振器具有其包层布置以引导并因此谐振仅有正确偏振的惰性波。 在第三种情况下，光学非线性惰性材料的光学非线性系数被空间调制，其周期等于谐波产生过程的相干长度的奇数整数，以获得准相位操作。 相互作用的操作提高了谐波产生过程的效率。

    Diode laser pumped co-doped laser
    2.
    发明授权
    Diode laser pumped co-doped laser 失效
    二极管激光泵浦共掺激光器

    公开(公告)号：US4701928A

    公开(公告)日：1987-10-20

    申请号：US782880

    申请日：1985-10-02

    申请人： Tso Y. Fan ,  Robert L. Byer

    发明人： Tso Y. Fan ,  Robert L. Byer

    IPC分类号： H01S3/04 ,  H01S3/042 ,  H01S3/16 ,  H01S3/14 ,  H01S3/091

    CPC分类号： H01S3/042 ,  H01S3/16 ,  H01S3/0405

    摘要： A miniature solid state near room temperature laser includes a laser crystal doped with a laser ion and an absorber ion. The absorber ion absorbs pumping radiation derived from the output of a laser diode and transfers the absorbed energy to the laser ion for inverting the population of the desired energy transition levels to produce an eyesafe output beam with wavelengths greater than 1.4 microns. In a preferred embodiment, the host crystal is YAG and it is co-doped with Ho as the laser ion and Er as the absorber ion. A small concentration of Tm ion may be doped into the crystal to enhance pumping efficiency. Improved efficiency can be obtained by cooling the laser crystal with a thermoelectric cooler and by tuning the output of the diode laser pump to an absorption peak of the absorbing ion.

    摘要翻译： 在室温激光器附近的微型固体包括掺杂有激光离子的激光晶体和吸收剂离子。 吸收体离子吸收从激光二极管的输出产生的泵浦辐射，并将吸收的能量转移到激光离子，以反转所需能量跃迁水平的群体，以产生波长大于1.4微米的眼睛输出光束。 在优选的实施方案中，主晶体是YAG，并且其与Ho作为激光离子和Er作为吸收剂离子共掺杂。 可以将少量的Tm离子掺杂到晶体中以提高泵送效率。 通过用热电冷却器冷却激光晶体并通过将二极管激光泵的输出调谐到吸收离子的吸收峰可以获得提高的效率。

    Diode pumped laser and doubling to obtain blue light
    3.
    发明授权
    Diode pumped laser and doubling to obtain blue light 失效
    二极管泵浦激光和倍增获得蓝光

    公开(公告)号：US4809291A

    公开(公告)日：1989-02-28

    申请号：US907495

    申请日：1986-09-15

    申请人： Robert L. Byer ,  Tso Y. Fan

    发明人： Robert L. Byer ,  Tso Y. Fan

    IPC分类号： G02F1/35 ,  H01S3/0941 ,  H01S3/109 ,  H01S3/16 ,  H01S5/06 ,  H01S3/091

    CPC分类号： H01S3/109 ,  G02F2001/3542 ,  G02F2001/3546 ,  H01S2302/00 ,  H01S2303/00 ,  H01S3/09415 ,  H01S3/1611 ,  H01S3/1671

    摘要： A source of coherent blue light comprises a diode laser for pumping a Nd.sup.3+ doped member of lasant material disposed within an optical resonator for exciting the .sup.4 F.sub.3/2 -.sup.4 I.sub.9/2 laser transition of a wavelength within the range of 0.870 to 0.960 .mu.m. The laser radiation within the optical resonator is doubled by means of a doubler crystal of a non-linear, electro-optic material to produce blue light which is then extracted from the optical resonator as an output beam. A thermo-electric cooler is coupled in heat-exchanging relation with the Nd.sup.3+ doped laser material to improve the efficiency and the doubler crystal is temperature controlled for phase matching to the laser radiation within the range of 0.870 to 0.960 .mu.m. The diode pump laser is preferably either a GaAlAs or GaAs diode laser producing pumping radiation of a wavelength of approximately 0.810 .mu.m. In the case of Nd:YAG end pumped laser material, the laser material is preferably doped to have a high an absorption coefficient as possible and its length is chosen to be within the range of 0.5 to 3 mm. In one embodiment, the lasant material and the non-linear, electro-optic material are disposed in separate optical resonators with the laser resonator optically decoupled from the doubler resonator for inhibiting reflection of optical power back to the laser resonator.

    摘要翻译： 相干蓝光源包括二极管激光器，用于泵浦设置在光学谐振器内的惰性材料的Nd3 +掺杂元件，用于激发波长在0.870至0.960μm范围内的4F3 / 2-4I9 / 2激光转换。 光学谐振器内的激光辐射借助于非线性电光材料的倍晶晶体加倍，以产生蓝光，然后将其从光谐振器中提取为输出光束。 热电冷却器与Nd3 +掺杂的激光材料以热交换关系耦合，以提高效率，并且倍增晶体受温度控制，用于激光辐射的相位匹配在0.870至0.960μm的范围内。 二极管泵浦激光器优选地是产生大约0.810μm波长的泵浦辐射的GaAlAs或GaAs二极管激光器。 在Nd：YAG端部泵浦激光材料的情况下，激光材料优选被掺杂以具有尽可能高的吸收系数，并且其长度被选择在0.5至3mm的范围内。 在一个实施例中，将惰性材料和非线性电光材料设置在分离的光学谐振器中，激光谐振器与倍频谐振器光学去耦合，以抑制光功率反射回激光谐振器。

    Cladding for transverse-pumped solid-state laser
    4.
    发明授权
    Cladding for transverse-pumped solid-state laser 失效
    横向泵浦固体激光器的包层

    公开(公告)号：US4860295A

    公开(公告)日：1989-08-22

    申请号：US283431

    申请日：1988-12-12

    申请人： Robert L. Byer ,  Tso Y. Fan

    发明人： Robert L. Byer ,  Tso Y. Fan

    IPC分类号： H01S3/06

    CPC分类号： H01S3/0612 ,  H01S3/0617 ,  H01S3/0625 ,  H01S3/094084

    摘要： In a transverse-pumped, solid-state laser, a nonabsorptive cladding surrounds a gain medium. A single transverse mode, namely the TEM.sub.00 mode, is provided. The TEM.sub.00 mode has a cross-sectional diameter greater than a transverse dimension of the gain medium but less than a transverse dimension of the cladding. The required size of the gain medium is minimized while a threshold for laser output is lowered.

    摘要翻译： 在横向泵浦的固态激光器中，非吸收性包层围绕增益介质。 提供单一横向模式，即TEM00模式。 TEM00模式的横截面直径大于增益介质的横向尺寸，但小于包层的横向尺寸。 所需的增益介质尺寸最小化，而激光输出的阈值降低。

    Laser-driven deflection arrangements and methods involving charged particle beams
    6.
    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
    7.
    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。