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    METHOD FOR FABRICATING THIN FILMS
    71.
    发明申请
    METHOD FOR FABRICATING THIN FILMS 审中-公开
    薄膜制作方法

    公开(公告)号：US20090246413A1

    公开(公告)日：2009-10-01

    申请号：US12254076

    申请日：2008-10-20

    Applicant: Makoto Murakami ,  Zhendong Hu ,  Yong Che ,  Bing Liu

    Inventor： Makoto Murakami ,  Zhendong Hu ,  Yong Che ,  Bing Liu

    IPC: C23C14/30 ,  C23C16/54

    CPC classification number: C23C14/28 ,  C23C14/08 ,  C23C14/564 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/2308

    Abstract: A method of ultrashort pulsed laser deposition (PLD) capable of continuously tuning formed-film morphology from that of a nanoparticle aggregate to a smooth thin film completely free of particles and droplets. The materials that can be synthesized using various embodiments of the invention include, but are not limited to, metals, alloys, metal oxides, and semiconductors. A ‘burst’ mode of ultrashort pulsed laser ablation and deposition is provided, where each ‘burst’ contains a train of laser pulses. Tuning of the film morphology is achieved by controlling the burst-mode parameters such as the number of pulses and the time-spacing between the pulses within each burst, the burst repetition rate, and the laser fluence. The system includes an ultrashort pulsed laser, an optical setup for delivering the laser beam such that the beam is focused onto the target surface with an appropriate average energy density (fluence), and a vacuum chamber in which the target and the substrate are installed and background gases and their pressures are appropriately adjusted.

    Abstract translation: 一种超短脉冲激光沉积（PLD）的方法，其能够将形成膜的形态从纳米颗粒聚集体的形态连续调节到完全没有颗粒和液滴的光滑薄膜。 可以使用本发明的各种实施方案合成的材料包括但不限于金属，合金，金属氧化物和半导体。 提供了超短脉冲激光烧蚀和沉积的“突发”模式，其中每个“脉冲串”包含一系列激光脉冲。 通过控制脉冲串模式参数，例如脉冲数和每个脉冲之间的脉冲之间的时间间隔，脉冲串重复频率和激光能量密度来实现电影形态的调整。 该系统包括超短脉冲激光器，用于传送激光束的光学装置，使得光束以适当的平均能量密度（能量密度）聚焦到目标表面上;以及真空室，其中安装有靶和基底; 背景气体及其压力得到适当调整。

    Multimode amplifier for amplifying single mode light
    72.
    发明授权
    Multimode amplifier for amplifying single mode light 有权
    用于放大单模光的多模放大器

    公开(公告)号：US07576909B2

    公开(公告)日：2009-08-18

    申请号：US11141704

    申请日：2005-06-01

    Applicant: Donald J. Harter ,  Martin E. Fermann

    Inventor： Donald J. Harter ,  Martin E. Fermann

    IPC: H01S3/00

    CPC classification number: H01S3/0627 ,  G02B6/262 ,  G02F1/3525 ,  H01S3/0606 ,  H01S3/0615 ,  H01S3/06708 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094007 ,  H01S3/094069 ,  H01S3/09415 ,  H01S3/115 ,  H01S3/1611 ,  H01S3/1618 ,  H01S3/1673 ,  H01S3/302

    Abstract: The invention describes techniques for the control of the spatial as well as spectral beam quality of multi-mode fiber amplification of high peak power pulses as well as using such a configuration to replace the present diode-pumped, Neodynium based sources. Perfect spatial beam-quality can be ensured by exciting the fundamental mode in the multi-mode fibers with appropriate mode-matching optics and techniques. The loss of spatial beam-quality in the multi-mode fibers along the fiber length can be minimized by using multi-mode fibers with large cladding diameters. Near diffraction-limited coherent multi-mode amplifiers can be conveniently cladding pumped, allowing for the generation of high average power. Moreover, the polarization state in the multi-mode fiber amplifiers can be preserved by implementing multi-mode fibers with stress producing regions or elliptical fiber cores. These lasers find application as a general replacement of Nd: based lasers, especially Nd:YAG lasers. Particularly utility is disclosed for applications in the marking, micro-machining and drilling areas.

    Abstract translation: 本发明描述了用于控制高峰值功率脉冲的多模光纤放大的空间以及光束质量的技术，以及使用这种配置来替代当前二极管泵浦的基于钕的源。 通过适当的模式匹配光学和技术，可以通过激发多模光纤中的基模来确保完美的空间光束质量。 通过使用具有大包层直径的多模光纤，能够使沿着光纤长度的多模光纤中的空间光束质量损失最小化。 近衍射极限相干多模放大器可以方便地进行包层泵浦，从而产生高平均功率。 此外，通过实施具有应力产生区域或椭圆形光纤核心的多模光纤，可以保持多模光纤放大器中的极化状态。 这些激光器可以用作Nd：基Nd：YAG激光器的一般替代品。 公开了用于标记，微加工和钻孔领域的应用。

    High power fiber chirped pulse amplification system utilizing telecom-type components
    73.
    发明授权
    High power fiber chirped pulse amplification system utilizing telecom-type components 失效
    大功率光纤啁啾脉冲放大系统利用电信型元件

    公开(公告)号：US07567376B2

    公开(公告)日：2009-07-28

    申请号：US12171780

    申请日：2008-07-11

    Applicant: Xinhua Gu ,  Yuzuru Uehara ,  Donald Harter

    Inventor： Xinhua Gu ,  Yuzuru Uehara ,  Donald Harter

    IPC: H04B10/17 ,  H01S3/00

    CPC classification number: H01S3/2333 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/1608 ,  H01S3/1618 ,  H01S3/2316

    Abstract: A chirped pulse amplifier (CPA) system having a mode-locked laser and a high-speed pulse selector, wherein the pulse selector modulates output pulses based upon an applied modulation voltage. A pulse selector may be an integrated electro-optic modulator, for example a LiNbO3 modulator, or an electro-absorption modulator. Difficulties related to free-space alignment and operational stability of some prior designs are reduced or eliminated. Fiber coupling generally simplifies beam delivery and alignment. Some embodiments include an erbium fiber (or erbium-ytterbium) based CPA system operating at a wavelength of approximately 1550 nanometers. Similar performance can be obtained at other wavelengths, for example a 1.06 .micrometer Yb-doped fiber system. Moreover, high amplification and peak intensity at the output may be achieved while avoiding non-linear effects in the pulse selector, thereby providing for high intensity picosecond or femtosecond operation.

    Abstract translation: 一种具有锁模激光器和高速脉冲选择器的啁啾脉冲放大器（CPA）系统，其中脉冲选择器基于施加的调制电压来调制输出脉冲。 脉冲选择器可以是集成电光调制器，例如LiNbO 3调制器或电吸收调制器。 减少或消除了一些现有设计中与自由空间对准和操作稳定性相关的困难。 光纤耦合通常简化光束传输和对准。 一些实施例包括以约1550纳米的波长工作的基于铒光纤（或铒 - 镱）的CPA系统。 可以在其他波长下获得类似的性能，例如1.06微米的Yb掺杂的光纤系统。 此外，可以在避免脉冲选择器中的非线性效应的同时实现输出端的高放大和峰值强度，从而提供高强度皮秒或飞秒操作。

    METHOD OF PRODUCING COMPOUND NANORODS AND THIN FILMS
    78.
    发明申请
    METHOD OF PRODUCING COMPOUND NANORODS AND THIN FILMS 有权
    生产化合物和薄膜的方法

    公开(公告)号：US20080292808A1

    公开(公告)日：2008-11-27

    申请号：US11754031

    申请日：2007-05-25

    Applicant: Bing Liu ,  Zhendong Hu ,  Yong Che

    Inventor： Bing Liu ,  Zhendong Hu ,  Yong Che

    IPC: B05D3/12

    CPC classification number: C23C14/086 ,  C23C14/28 ,  C30B23/00 ,  C30B29/16 ,  C30B29/60 ,  Y10T428/25

    Abstract: A method of producing compound nanorods and thin films under a controlled growth mode is described. The method involves ablating compound targets using an ultrafast pulsed laser and depositing the ablated materials onto a substrate. When producing compound nanorods, external catalysts such as pre-deposited metal nanoparticles are not involved. Instead, at the beginning of deposition, simply by varying the fluence at the focal spot on the target, a self-formed seed layer can be introduced for nanorods growth. This provides a simple method of producing high purity nanorods and controlling the growth mode. Three growth modes are covered by the present invention, including nanorod growth, thin film growth, and nano-porous film growth.

    Abstract translation: 描述了在受控生长模式下制备复合纳米棒和薄膜的方法。 该方法包括使用超快速脉冲激光烧蚀化合物靶，并将消融材料沉积在基底上。 当制备复合纳米棒时，不涉及外部催化剂如预沉积的金属纳米颗粒。 相反，在沉积开始时，简单地通过改变目标上焦点处的注量，可以引入自形晶种层用于纳米棒生长。 这提供了生产高纯度纳米棒并控制生长模式的简单方法。 本发明涵盖三种生长方式，包括纳米棒生长，薄膜生长和纳米多孔膜生长。

    Beam stabilized fiber laser
    80.
    发明申请
    Beam stabilized fiber laser 有权
    光束稳定光纤激光器

    公开(公告)号：US20080240184A1

    公开(公告)日：2008-10-02

    申请号：US11727500

    申请日：2007-03-27

    Applicant: Gyu C. Cho ,  Oleg Bouevitch

    Inventor： Gyu C. Cho ,  Oleg Bouevitch

    IPC: H01S3/00

    CPC classification number: B23K26/043 ,  H01S3/0057 ,  H01S3/0071 ,  H01S3/067 ,  H01S3/2308

    Abstract: A laser head generating ultrashort pulses is integrated with an active beam steering device in the head. Direct linkage with an application system by means of an adequate interface protocol enables the active device to be controlled directly by the application system.

    Abstract translation: 产生超短脉冲的激光头与头部中的主动光束转向装置集成。 通过适当的接口协议与应用系统的直接链接使得主动设备能够被应用系统直接控制。

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