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    TWO-STAGE LIGHT CONCENTRATOR
    94.
    发明申请
    TWO-STAGE LIGHT CONCENTRATOR 审中-公开

    公开(公告)号：US20170288079A1

    公开(公告)日：2017-10-05

    申请号：US15083742

    申请日：2016-03-29

    Applicant: X Development LLC

    Inventor： Martin F. Schubert

    IPC: H01L31/055

    CPC classification number: H01L31/055 ,  G02B19/00 ,  H01L31/0547 ,  H01S3/0612 ,  H01S3/063 ,  H01S3/0915 ,  H01S3/093 ,  H01S3/09403 ,  H01S3/169 ,  Y02E10/50 ,  Y02E10/52

    Abstract: A light concentrator includes a luminescent concentrator and a gain medium. The luminescent concentrator includes a semiconductor material and the semiconductor material absorbs first photons. The first photons have energy greater than or equal to a threshold energy, and the semiconductor material emits second photons through a spontaneous emission process where the second photons have less energy than the first photons. The gain medium is optically coupled to the luminescent concentrator to receive the second photons. The gain medium absorbs the second photons, and in response to absorbing the second photons, the gain medium emits third photons through a stimulated emission process. The third photons have less energy than the second photons.

    Solid state laser with multiple cores coupled by fold optics
    95.
    发明授权
    Solid state laser with multiple cores coupled by fold optics 有权
    具有通过折叠光学器件耦合的多个核心的固态激光器

    公开(公告)号：US09356420B1

    公开(公告)日：2016-05-31

    申请号：US14720097

    申请日：2015-05-22

    Applicant: Gooch and Housego PLC

    Inventor： Trevor James Cook ,  Michael Christopher Cox ,  Peter Edward Mackay

    IPC: H01S3/11 ,  H01S3/08 ,  H01S3/06

    CPC classification number: H01S3/0612 ,  H01S3/025 ,  H01S3/0405 ,  H01S3/061 ,  H01S3/0621 ,  H01S3/0627 ,  H01S3/07 ,  H01S3/08059 ,  H01S3/0816 ,  H01S3/0941 ,  H01S3/113

    Abstract: A laser rod assembly includes a first and second laser rod embedded in a cladding material. The assembly has a first end and a second end. The laser rods generate laser light at λlaser (λlaser light) when pumped by pump power at λpump. A reflecting outer surface at λpump is on or over a majority of an outer surface of the cladding material. Fold optic(s) on the second end provides optical coupling between the laser rods. An optical resonator includes a highly reflecting (HR) mirror at λlaser over an end of the first laser rod on the first end and an output coupler over an end of the second laser rod also on the first end.

    Abstract translation: 激光棒组件包括嵌入包层材料中的第一和第二激光棒。 组件具有第一端和第二端。 当泵浦功率为λpump泵浦时，激光棒产生λlaser（λ激光）的激光。 λpump处的反射外表面在包层材料的外表面的大部分上或之上。 第二端的折叠光纤提供激光棒之间的光耦合。 光学谐振器包括在第一端上的第一激光棒的端部处的λ激光器处的高反射（HR）反射镜，以及在第一端上的第二激光棒的端部上的输出耦合器。

    Optical amplifier arrangement
    96.
    发明授权
    Optical amplifier arrangement 有权
    光放大器布置

    公开(公告)号：US09306366B2

    公开(公告)日：2016-04-05

    申请号：US14445506

    申请日：2014-07-29

    Applicant: Rofin-Sinar UK Ltd.

    Inventor： Jason Robert Lee ,  Benjamin Stuart Fulford

    IPC: H01S3/00 ,  H01S3/10 ,  H01S3/23 ,  H01S3/16 ,  H01S3/08 ,  H01S3/081 ,  H01S3/0941 ,  H01S3/223 ,  H01S3/06

    CPC classification number: H01S3/10023 ,  H01S3/0602 ,  H01S3/0606 ,  H01S3/0612 ,  H01S3/08072 ,  H01S3/08095 ,  H01S3/081 ,  H01S3/0941 ,  H01S3/10061 ,  H01S3/163 ,  H01S3/2232 ,  H01S3/2325 ,  H01S3/2333

    Abstract: An optical amplifier which integrates a pre-amplifier and a power amplifier in a single rectangular active medium to enable amplification of low power ultra-short pulses to optimal power levels. A seed beam passes through the amplification medium along a first pre-amplification path making multiple traverses of the medium. It is imaged back along the first path to make a double pass of the medium as a pre-amplifier. The beam is then re-imaged into the medium again on a second power amplification path, making multiple traverses of the medium in a single pass. The paths are independent but overlap so that efficient power extraction is achieved. Embodiments based on all passive components are described.

    Abstract translation: 一种在单个矩形有源介质中集成前置放大器和功率放大器以使低功率超短脉冲放大到最佳功率水平的光放大器。 种子束沿着通过介质的多次穿过的第一预放大路径通过放大介质。 它沿着第一路径成像回来，以作为前置放大器的介质的双倍传递。 然后在第二功率放大路径上再次将光束重新成像到介质中，从而在单次通过中进行介质的多次遍历。 这些路径是独立的，但重叠，从而实现有效的功率提取。 描述了基于所有无源组件的实施例。

    Q-switched laser device
    97.
    发明授权
    Q-switched laser device 有权
    Q开关激光器件

    公开(公告)号：US09203210B2

    公开(公告)日：2015-12-01

    申请号：US14523102

    申请日：2014-10-24

    Applicant: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTES OF NATURAL SCIENCES

    Inventor： Takunori Taira ,  Rakesh Bhandari

    IPC: H01S3/11 ,  H01S3/091 ,  H01S3/09 ,  H01S3/14 ,  H01S3/16

    CPC classification number: H01S3/11 ,  H01S3/0092 ,  H01S3/061 ,  H01S3/0612 ,  H01S3/0627 ,  H01S3/09 ,  H01S3/091 ,  H01S3/094076 ,  H01S3/113 ,  H01S3/14 ,  H01S3/16 ,  H01S3/1603 ,  H01S3/1611 ,  H01S3/1643

    Abstract: When an excitation light is entered in a laser medium including a doped (containing rare earth element) YAG, the vicinity of the excitation light entry face is locally heated which generates a birefringence, causing degradation of linear polarization of emitted laser. To avoid such a phenomenon, it was necessary to make the excitation light pulsed and slow down the repetition rate of the pulse. In this device, an undoped YAG is bonded to a excitation light entry face of the laser medium made of a doped YAG. By arranging the YAG axis so as to extend along the optical axis of the laser oscillation system, a linearly polarized pulse laser can be obtained.

    Abstract translation: 当在包括掺杂（含有稀土元素）YAG的激光介质中进入激发光时，激发光入射面的附近局部加热，产生双折射，导致发射激光器的线偏振的劣化。 为了避免这种现象，有必要使激发光脉冲，并减慢脉冲的重复频率。 在该器件中，未掺杂的YAG结合到由掺杂的YAG制成的激光介质的激发光入射面。 通过沿着激光振荡系统的光轴布置YAG <100'轴线，可以获得线偏振脉冲激光器。

    Laser design
    98.
    发明授权
    Laser design 有权
    激光设计

    公开(公告)号：US09178329B2

    公开(公告)日：2015-11-03

    申请号：US13470081

    申请日：2012-05-11

    Applicant: Barry A. Wechsler ,  Michael P. Scripsick ,  David S. Sumida ,  Thomas G. Crow

    Inventor： Barry A. Wechsler ,  Michael P. Scripsick ,  David S. Sumida ,  Thomas G. Crow

    IPC: H01S3/04 ,  H01S3/06 ,  C30B19/12 ,  C30B29/32 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/16

    CPC classification number: H01S3/0602 ,  C30B19/12 ,  C30B29/32 ,  H01S3/0408 ,  H01S3/0604 ,  H01S3/0612 ,  H01S3/09408 ,  H01S3/094084 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/1675

    Abstract: A laser gain element including an undoped layer of a monoclinic double tungstate (MDT) crystal, and a method of forming a laser gain element are provided. The laser gain element includes a layer of doped MDT crystal adjacent to the undoped layer, the doped MDT layer including a pre-selected concentration of rare earth ions. The layer of doped MDT crystal has an absorption peak at a first wavelength and an emission peak at a second wavelength longer than the first wavelength; and the layer of doped MDT crystal has a fluorescence emission with a weighted average at a third wavelength shorter than the first wavelength. A laser resonator cavity formed with a plurality of composite gain elements as above is also provided.

    Abstract translation: 提供了包括单斜晶双晶钨酸盐（MDT）晶体的未掺杂层的激光增益元件以及形成激光增益元件的方法。 激光增益元件包括与未掺杂层相邻的掺杂MDT晶体层，掺杂的MDT层包括预先选择的稀土离子浓度。 掺杂的MDT晶体层在第一波长处具有吸收峰，并且在比第一波长长的第二波长处具有发射峰; 并且掺杂的MDT晶体层具有在比第一波长短的第三波长处的加权平均的荧光发射。 还提供了如上所述形成有多个复合增益元件的激光谐振腔。

    Suppression of amplified spontaneous emission (ASE) within laser planar waveguide devices
    100.
    发明授权
    Suppression of amplified spontaneous emission (ASE) within laser planar waveguide devices 有权
    在激光平面波导器件中抑制放大的自发发射（ASE）

    公开(公告)号：US09030732B2

    公开(公告)日：2015-05-12

    申请号：US13796309

    申请日：2013-03-12

    Applicant: Raytheon Company

    Inventor： Friedrich Strohkendl

    IPC: H01S3/06 ,  H01S3/063 ,  G02B6/10 ,  H01S3/16 ,  H01S5/028 ,  H01S5/50

    CPC classification number: H01S3/0606 ,  G02B6/10 ,  H01S3/0612 ,  H01S3/0615 ,  H01S3/0625 ,  H01S3/063 ,  H01S3/0632 ,  H01S3/1608 ,  H01S3/161 ,  H01S3/1611 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/1623 ,  H01S3/1643 ,  H01S3/1698 ,  H01S3/2308 ,  H01S5/028 ,  H01S5/50 ,  H01S2301/02

    Abstract: Described herein are devices and techniques for suppressing parasitic modes in planar waveguide amplifier structures. One or more of the side and end facets of a planar waveguide amplifier are angled with respect to a fast axis defined in a transverse plane perpendicular to a core region. A relationship between glancing in-plane angles of incidence and threshold bevel angles θT can be used to select side bevel angles θS to suppress parasitics by redirecting amplified spontaneous emission (ASE) from the core. It is possible to select the one or more bevel angles θS to be great enough to substantially redirect all but ballistic photons of any guided modes, effectively narrowing a numerical aperture of the planar waveguide amplifier along a slow axis, defined in a transverse plane perpendicular to the fast axis. Beneficially, such improvements can be realized for three part waveguide structures (e.g., cladding-core-cladding), with substantially smooth edge facets.

    Abstract translation: 这里描述了用于抑制平面波导放大器结构中的寄生模式的装置和技术。 平面波导放大器的一个或多个侧面和端面相对于垂直于芯部区域的横向平面中限定的快轴成角度。 扫描面内入射角和阈值斜角角度之间的关系; T可用于选择侧斜角和角度; S通过将放大的自发发射（ASE）从核心重定向来抑制寄生效应。 可以选择一个或多个斜角和角度; S足够大以重新定向任何导向模式的所有弹道光子，有效地使平面波导放大器的数值孔径沿着横向平面中限定的慢轴变窄 垂直于快轴。 有利的是，可以实现具有基本平滑的边缘面的三部分波导结构（例如，包层芯包层）的这种改进。

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