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264 条记录 (耗时 0.018 秒)

    Variable coherence length high brightness laser architecture
    53.
    发明授权
    Variable coherence length high brightness laser architecture 失效
    可变相干长度高亮度激光器架构

    公开(公告)号：US5825791A

    公开(公告)日：1998-10-20

    申请号：US520349

    申请日：1995-08-28

    申请人： Hagop Injeyan ,  Lawrence J. Lembo ,  Randall J. St. Pierre ,  Marcy M. Valley

    发明人： Hagop Injeyan ,  Lawrence J. Lembo ,  Randall J. St. Pierre ,  Marcy M. Valley

    IPC分类号： H01S3/05 ,  G02F1/03 ,  H01S3/00 ,  H01S3/10 ,  H01S3/16 ,  H01S3/23

    CPC分类号： H01S3/0057 ,  H01S3/10076 ,  H01S3/2333

    摘要： A high power laser source having a preselected broad bandwidth, including a master oscillator providing a single-mode laser beam, a resonant electro-optical modulator and a source of radio-frequency (rf) modulation voltage, to produce a modulator output beam having sidebands spaced on each side of the nominal frequency of the single-mode laser beam. The bandwidth and the number of modes may be varied by controlling the voltage applied to the modulator. At least one additional modulator in series with the first provides for the addition of other sidebands overlaying those generated with just one modulator. In another embodiment of the invention, the modulator is installed in a PC MOPA (phase conjugated master oscillator power amplifier) configuration to provide modulation only on the return path of the beam from a phase conjugation device having a stimulated Brillouin scattering (SBS) medium. Because the electro-optical modulator is sensitive to polarization direction, it can be oriented to be effective only for the return beam, which has a different direction of polarization from that of the single-mode laser beam, thus optimizing the performance of the SBS medium.

    摘要翻译： 具有预选宽带宽的高功率激光源，包括提供单模激光束的主振荡器，谐振电光调制器和射频（RF）调制电压源），以产生具有边带的调制器输出光束 在单模激光束的标称频率的每一侧隔开。 可以通过控制施加到调制器的电压来改变带宽和模式数量。 与第一个串联的至少一个附加调制器提供了与仅用一个调制器产生的边带重叠的其他边带的添加。 在本发明的另一个实施例中，调制器安装在PC MOPA（相位共轭主振荡器功率放大器）配置中，以仅提供来自具有受激布里渊散射（SBS）介质的相位共轭装置的波束的返回路径的调制。 因为电光调制器对极化方向敏感，所以它可以被定向为仅对于具有与单模激光束的偏振方向不同的返回光束有效，从而优化SBS介质的性能 。

    Optimized laser energy conversion through automatic mode matched pumping
    54.
    发明授权
    Optimized laser energy conversion through automatic mode matched pumping 失效
    通过自动模式匹配泵浦优化激光能量转换

    公开(公告)号：US5627853A

    公开(公告)日：1997-05-06

    申请号：US448419

    申请日：1995-06-01

    申请人： Aram Mooradian ,  Mark E. Kuznetsov

    发明人： Aram Mooradian ,  Mark E. Kuznetsov

    IPC分类号： H01S3/06 ,  H01S3/08 ,  H01S3/109 ,  H01S5/04 ,  H01S5/06 ,  H01S5/062 ,  H01S5/065 ,  H01S5/183 ,  H01S3/05 ,  H01S3/18

    CPC分类号： H01S5/18383 ,  H01S5/041 ,  H01S2301/166 ,  H01S3/0627 ,  H01S3/08072 ,  H01S3/1022 ,  H01S5/0215 ,  H01S5/02484 ,  H01S5/0614 ,  H01S5/0658 ,  H01S5/18305 ,  H01S5/18388 ,  H01S5/423

    摘要： An apparatus and method for stabilizing the transverse mode of laser oscillation in a vertical cavity semiconductor laser and a microchip laser are disclosed. A preferred embodiment includes a quantum-well region formed over a semiconductor substrate. A first reflective surface is formed over the quantum-well region, and a second reflective surface is formed over the substrate, opposite the first reflective surface, forming a laser cavity. The quantum-well region is optically pumped, producing laser oscillation. The absorbed pump power causes a thermal lensing effect within the semiconductor material, stabilizing the transverse spatial mode of the laser cavity. The radius of curvature of the thermal lens is a function of absorbed pump power. Maximum power conversion efficiency is achieved if the pump power is controlled such that the diameter of the oscillating mode matches the diameter of the pump beam. The invention has applications in optical communication and laser printing.

    摘要翻译： PCT No.PCT / US95 / 03375 Sec。 371日期：1995年6月1日 102（e）1995年6月1日PCT 1995年3月16日PCT公布。 公开号WO95 / 25366 日期1995年9月12日公开了一种用于稳定垂直腔半导体激光器和微芯片激光器中激光振荡的横向模式的装置和方法。 优选实施例包括在半导体衬底上形成的量子阱区域。 第一反射表面形成在量子阱区域上，并且第二反射表面形成在衬底上，与第一反射表面相对，形成激光腔。 量子阱区被光泵浦，产生激光振荡。 吸收的泵浦功率在半导体材料内引起热透镜效应，稳定激光腔的横向空间模式。 热透镜的曲率半径是吸收的泵浦功率的函数。 如果控制泵浦功率使得振荡模式的直径与泵浦光束的直径相匹配，则可实现最大功率转换效率。 本发明在光通信和激光打印中具有应用。

    VCSEL with vertical offset operating region providing a lateral waveguide and current limiting and method of fabrication
    55.
    发明授权
    VCSEL with vertical offset operating region providing a lateral waveguide and current limiting and method of fabrication 失效
    具有垂直偏移操作区域的VCSEL提供横向波导和电流限制以及制造方法

    公开(公告)号：US5351257A

    公开(公告)日：1994-09-27

    申请号：US28015

    申请日：1993-03-08

    申请人： Michael S. Lebby ,  Chan-Long Shieh ,  Donald E. Ackley

    发明人： Michael S. Lebby ,  Chan-Long Shieh ,  Donald E. Ackley

    IPC分类号： H01S5/00 ,  H01S5/042 ,  H01S5/183 ,  H01S3/05 ,  H01S3/19

    CPC分类号： H01S5/18327 ,  H01S2301/176 ,  H01S5/0207 ,  H01S5/0422

    摘要： A VCSEL including a first mirror stack, an active region and a second mirror stack positioned on a substrate with portions of the active region and the first and second mirror stacks being offset from surrounding portions by an offset area in the surface of the substrate so as to define a lateral waveguide which confines the operating region of the VCSEL. The surrounding portions of the second mirror stack are removed to provide current control and refractory metal contacts are formed on the upper and lower surfaces. Methods of fabricating the offset as a depression or a mesa in the surface of the substrate and the resulting VCSEL are disclosed.

    摘要翻译： 包括位于衬底上的第一反射镜堆叠，有源区域和第二反射镜堆叠的VCSEL，其中有源区域和第一和第二反射镜叠层的部分通过衬底的表面中的偏移区域从周围部分偏移，从而 以限定限制VCSEL的操作区域的横向波导。 移除第二反射镜叠层的周围部分以提供电流控制，并且在上表面和下表面上形成耐火金属触点。 公开了将偏移制造为衬底表面中的凹陷或台面的方法和所得到的VCSEL。

    Solid state laser apparatus
    56.
    发明授权
    Solid state laser apparatus 失效
    固态激光装置

    公开(公告)号：US5299213A

    公开(公告)日：1994-03-29

    申请号：US26100

    申请日：1993-03-04

    申请人： Kazuki Kuba ,  Takashi Yamamoto ,  Shigenori Yagi

    发明人： Kazuki Kuba ,  Takashi Yamamoto ,  Shigenori Yagi

    IPC分类号： H01S3/042 ,  H01S3/05 ,  H01S3/06 ,  H01S3/08 ,  H01S3/093 ,  H01S3/045

    CPC分类号： H01S3/025 ,  H01S3/042 ,  H01S3/093 ,  H01S3/0407 ,  H01S3/0606 ,  H01S3/08072

    摘要： A solid state laser apparatus comprises a laser medium having a pair of optically flat surfaces confronting to each other, and side surfaces intersecting the optically flat surfaces along an optical axis, the laser medium having a rectangular cross section; heat insulators adhered to the side surfaces of the laser medium; and reflective films for shielding the thermal insulators from pumping light. A solid state laser apparatus may comprise heat conductors bonded to the side surfaces of the laser medium, the heat conductors removing heat which occurs at bonding surfaces, the amount of removed heat from the side surfaces being smaller than that from the optically flat surfaces.

    摘要翻译： 固体激光装置包括具有彼此面对的一对光学平面的激光介质和沿着光轴与光学平坦表面相交的侧表面，激光介质具有矩形横截面; 绝热体粘附到激光介质的侧表面; 以及用于屏蔽热绝缘体而不是泵浦光的反射膜。 固体激光装置可以包括结合到激光介质的侧表面的热导体，去除在结合表面处发生热量的热导体，从侧面移除的热量比从光学平面表面移除的热量少。

    Stress-free mounting and protection of liquid-cooled solid-state laser media
    57.
    发明授权
    Stress-free mounting and protection of liquid-cooled solid-state laser media 失效
    无压力安装和保护液冷固体激光介质

    公开(公告)号：US5272710A

    公开(公告)日：1993-12-21

    申请号：US941626

    申请日：1992-09-08

    申请人： David S. Sumida ,  Robert W. Byren

    发明人： David S. Sumida ,  Robert W. Byren

    IPC分类号： H01S3/04 ,  H01S3/042 ,  H01S3/05 ,  H01S3/16

    CPC分类号： H01S3/042 ,  H01S3/025 ,  H01S3/0407 ,  H01S3/061 ,  H01S3/1611 ,  H01S3/1653

    摘要： A laser structure that reduces thermally-induced mounting stress on low fracture strength solid-state laser rods. A transparent sleeve of relatively high strength optical material that has relatively high thermal conductivity is provided around the laser rod, and a thin layer of elastomer is provided between the laser material and the transparent sleeve. This arrangement of laser material, transparent sleeve, and elastomer allows sealing of a cooling fluid flow channel disposed around the laser/sleeve assembly using conventional means without applying stress directly to the laser rod material. This reduces the risk of fracturing the laser rod material due to thermal expansion near the seal and allows the laser to be operated at higher average power levels. The elastomer layer and high thermal conductivity sleeve efficiently conduct heat from the laser rod to the surrounding cooling liquid. This structure also minimizes damage to the surface of the strengthened laser rods due to handling and coolant erosion thereby preserving the thermal stress fracture resistance properties of the laser rod during transport, manufacturing assembly, operation, and maintenance.

    Laser resonator with high aspect ratio gain region and azimuthally symmetric Fresnel number
    58.
    发明授权
    Laser resonator with high aspect ratio gain region and azimuthally symmetric Fresnel number 失效
    具有高纵横比增益区域和方位角对称菲涅耳数的激光谐振器

    公开(公告)号：US4792765A

    公开(公告)日：1988-12-20

    申请号：US909370

    申请日：1986-09-19

    申请人： David C. Smith ,  Kurt E. Oughstun

    发明人： David C. Smith ,  Kurt E. Oughstun

    IPC分类号： H01S3/081 ,  H01S3/05 ,  H01S3/083 ,  H01S3/086

    CPC分类号： H01S3/0818

    摘要： An unstable optical resonator having a gain region that has an elliptic or other non-circular cross section still has the benefits of a total collimated cavity Fresnel number that is azimuthally symmetric by the combination of several cavity regions of azimuthally non-uniform Fresnel number of appropriate size.

    摘要翻译： 具有椭圆形或其他非圆形横截面的增益区域的不稳定光学谐振器仍然具有通过方位角不均匀菲律宾数目的若干个空腔区域的组合而具有方位角对称的总准直腔的菲涅尔数的优点 尺寸。

    Low divergence laser apparatus
    59.
    发明授权
    Low divergence laser apparatus 失效
    低发散激光装置

    公开(公告)号：US4731788A

    公开(公告)日：1988-03-15

    申请号：US888106

    申请日：1986-07-18

    申请人： Itamar Shoshan

    发明人： Itamar Shoshan

    IPC分类号： H01S3/05 ,  H01S3/081 ,  H01S3/23 ,  H01S3/10

    CPC分类号： H01S3/2308 ,  H01S3/08054 ,  H01S3/005 ,  H01S3/0805 ,  H01S3/0816 ,  H01S3/082

    摘要： A low divergence laser oscillator of the kind wherein an intra-cavity oscillator beam is propagated along a resonator axis and within a portion of the volume of the active medium and wherein a part of the intra-cavity oscillator beam intensity is coupled out of the oscillator by a first outcoupler as an extra-cavity beam. One of the oscillator beam is expanded and collimated so as to produce an expanded and collimated extra-cavity beam having a cross-sectional area substantially greater than the cross-sectional area of a portion of the active medium. Substantially the total intensity of the expanded collimated extra-cavity beam is introduced into the active medium so as to fill a volume of the active medium which is substantially greater than the volume of the above portion, thereby giving rise to amplification of the reintroduced beam. A polarizing element located within the resonator is used for the introducing. The intra-cavity beam is either transmitted through or reflected by the polarizing element while the extra-cavity beam is directed onto the polarizing element or transmitted therethrough without passing through said first outcoupler, a second outcoupling means being provided for coupling out the amplified beam.

    摘要翻译： 一种低发散激光振荡器，其中腔内振荡器波束沿着谐振器轴线传播并且在有源介质的体积的一部分内传播，并且其中腔内振荡器光束强度的一部分耦合在振荡器外 通过第一个外耦合器作为外腔光束。 振荡器光束之一被扩展和准直，以便产生具有基本上大于活动介质的一部分的横截面面积的横截面积的扩展和准直的外腔光束。 基本上将扩展的准直的外腔光束的总强度引入到活性介质中，以填充活性介质的体积，其大体上大于上述部分的体积，从而引起再引入的束的放大。 位于谐振器内的偏振元件用于引入。 腔体内的光束被透射通过偏振元件或由偏振元件反射，而外腔光束被引导到偏振元件上或透过其而不通过所述第一外耦合器，提供第二输出耦合装置用于耦合放大的光束。