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    BEAM SCANNING IMAGING METHOD AND APPARATUS
    164.
    发明申请
    BEAM SCANNING IMAGING METHOD AND APPARATUS 有权
    光束扫描成像方法和装置

    公开(公告)号：US20080251720A1

    公开(公告)日：2008-10-16

    申请号：US12055063

    申请日：2008-03-25

    Applicant: Jingzhou XU ,  Gyu Cheon CHO

    Inventor： Jingzhou XU ,  Gyu Cheon CHO

    IPC: H01L31/0232 ,  G01J5/02

    CPC classification number: G01B15/04 ,  G01B11/24 ,  G01N21/3581 ,  G01N22/00

    Abstract: An imaging apparatus uses focusing and collecting optics in combination with steering optics for efficient and speedy imaging of a target using an extended terahertz electro-magnetic range challenged by weak sources and low sensitivity of detection. This invention addresses efficient detection of this wave in combination with a speedy imaging speed. By proper location of optics to utilize angular conversion of the beam to a lateral scan, a rastering imaging apparatus is demonstrated without moving target or entire imaging system. A mirror-lens set is used to steer the terahertz (THz) beam along and (or) to collect the THz beam from each point of the target. The target is imaged with a much higher speed than when moving the target or the entire imaging system. A THz wave image can be taken at video frequency for practical usage of the apparatus in diverse application areas, where it has not been considered to be feasible.

    Abstract translation: 成像装置使用聚焦和收集光学元件与转向光学元件结合，以便使用由弱源激发的扩展的太赫兹电磁范围和低灵敏度的检测来对靶进行有效和快速的成像。 本发明结合快速的成像速度来解决该波的有效检测。 通过将光束的角度转换用于横向扫描的光学器件的适当位置，在没有移动目标或整个成像系统的情况下证明了成像设备。 使用镜面组来转向太赫兹（THz）光束并且（或）以从目标的每个点收集太赫兹光束。 目标以比移动目标或整个成像系统时高得多的速度成像。 可以在视频下拍摄太赫兹波图像，以便在不被认为是可行的各种应用领域中实际使用该设备。

    Method for depositing crystalline titania nanoparticles and films
    165.
    发明申请
    Method for depositing crystalline titania nanoparticles and films 审中-公开
    沉积结晶二氧化钛纳米粒子和薄膜的方法

    公开(公告)号：US20080187684A1

    公开(公告)日：2008-08-07

    申请号：US11798114

    申请日：2007-05-10

    Applicant: Zhendong Hu ,  Yong Che ,  Bing Liu

    Inventor： Zhendong Hu ,  Yong Che ,  Bing Liu

    IPC: C23C14/26

    CPC classification number: C30B23/08 ,  C23C14/083 ,  C23C14/28 ,  C30B29/16

    Abstract: The present invention provides a one-step and room-temperature process for depositing nanoparticles or nanocomposite (nanoparticle-assembled) films of crystalline titanium dioxide (TiO2) onto a substrate surface using ultrafast pulsed laser ablation of Titania or metal titanium target. The system includes a pulsed laser with a pulse duration ranging from a few femtoseconds to a few tens of picoseconds, an optical setup for processing the laser beam such that the beam is focused onto the target surface with an appropriate average energy density and an appropriate energy density distribution, and a vacuum chamber in which the target and the substrate are installed and background gases and their pressures are appropriately adjusted.

    Abstract translation: 本发明提供一步和室温方法，用于使用Titania的超快速脉冲激光烧蚀将结晶二氧化钛（TiO 2）的纳米颗粒或纳米复合材料（纳米颗粒组装的）膜沉积到基底表面上 或金属钛靶。 该系统包括脉冲激光，其脉冲持续时间范围从几飞秒到几十皮秒，用于处理激光束的光学设置，使得光束以适当的平均能量密度和适当的能量聚焦到目标表面上 密度分布，以及真空室，其中安装了目标物和基质，背景气体及其压力被适当调节。

    In-line, high energy fiber chirped pulse amplification system
    167.
    发明授权
    In-line, high energy fiber chirped pulse amplification system 有权
    在线高能纤维啁啾脉冲放大系统

    公开(公告)号：US07257302B2

    公开(公告)日：2007-08-14

    申请号：US10608233

    申请日：2003-06-30

    Applicant: Martin E. Fermann ,  Gennady Imeshev ,  Ingmar Hartl ,  Donald J. Harter

    Inventor： Martin E. Fermann ,  Gennady Imeshev ,  Ingmar Hartl ,  Donald J. Harter

    IPC: G02B6/02

    CPC classification number: H01S3/06754 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06725 ,  H01S3/094007 ,  H01S3/10015

    Abstract: By writing non-linear chirp into fiber Bragg gratings, greater control over dispersion compensation in CPA systems is obtained, such that, for example, the dispersion profile of the fiber Bragg grating and a bulk compressor may be matched. An iterative method of writing the fiber grating can reduce the group delay ripple to very low levels; and adaptive control of the fiber grating dispersion profile can further reduce these levels, while in addition offering greater acceptable yield in the manufacture of such gratings. Fiber Bragg gratings may be designed so as to provide customized pulse shapes optimized for various end uses, such as micromachining, for example, and may also be used to counteract gain-narrowing in a downstream amplifier.

    Abstract translation: 通过将非线性啁啾写入光纤布拉格光栅，可以获得对CPA系统中的色散补偿的更大控制，使得例如光纤布拉格光栅和大容量压缩机的色散曲线可以匹配。 编写光纤光栅的迭代方法可以将组延迟纹波降低到非常低的水平; 并且光纤光栅色散轮廓的自适应控制可以进一步降低这些水平，同时在制造这种光栅时提供更大的可接受的产量。 可以设计光纤布拉格光栅，以便提供针对各种最终用途（例如微加工）优化的定制脉冲形状，并且还可以用于抵消下游放大器中的增益变窄。

    PHOTONIC BANDGAP FIBERS
    168.
    发明申请
    PHOTONIC BANDGAP FIBERS 有权
    光电胶带纤维

    公开(公告)号：US20070163301A1

    公开(公告)日：2007-07-19

    申请号：US11686810

    申请日：2007-03-15

    Applicant: Liang Dong ,  Xiang Peng

    Inventor： Liang Dong ,  Xiang Peng

    IPC: C03B37/022 ,  C03B37/028 ,  C03B37/027

    CPC classification number: G01N21/65 ,  C03B37/01205 ,  C03B37/01208 ,  C03B37/0122 ,  C03B2203/04 ,  C03B2203/12 ,  C03B2203/14 ,  C03B2203/16 ,  C03B2203/42 ,  G01N21/774 ,  G01N2021/655 ,  G02B6/02238 ,  G02B6/023 ,  G02B6/02304 ,  G02B6/02328 ,  G02B6/02338 ,  G02B6/02347 ,  G02B6/02357 ,  G02B6/02361 ,  G02B6/4206

    Abstract: Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and lower transmission loss are also discussed. For example, in some fiber designs, smaller dimensions of high index material in the cladding and large core size provide small flat dispersion over a wide spectral range. In other examples, the thickness of the high index ring-shaped region closest to the core has sufficiently large dimensions to provide negative dispersion or zero dispersion at a desired wavelength. Additionally, low index cladding features distributed along concentric rings or circles may be used for achieving wide bandgaps.

    Abstract translation: 包括在本文所描述的许多结构之中的是设计成提供所需色散谱的光子带隙光纤。 此外，还讨论了用于实现宽传输频带和较低传输损耗的设计。 例如，在一些光纤设计中，包层中高折射率材料的较小尺寸和较大的芯体尺寸在较宽的光谱范围内提供较小的平坦色散。 在其他示例中，最靠近芯的高折射率环形区域的厚度具有足够大的尺寸以在期望的波长处提供负色散或零色散。 另外，沿着同心环或圆分布的低折射率包层特征可以用于实现宽带隙。

    Modular, high energy, widely-tunable ultrafast fiber source
    169.
    发明申请
    Modular, high energy, widely-tunable ultrafast fiber source 有权

    公开(公告)号：US20070103765A1

    公开(公告)日：2007-05-10

    申请号：US11643765

    申请日：2006-12-22

    Applicant: Martin Fermann ,  Almantas Galvanauskas ,  Donald Harter

    Inventor： Martin Fermann ,  Almantas Galvanauskas ,  Donald Harter

    IPC: H01S3/00

    CPC classification number: H01S3/1115 ,  H01S3/0057 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/094019 ,  H01S3/094042 ,  H01S3/109 ,  H01S3/1112 ,  H01S3/1616 ,  H01S3/1618 ,  H01S3/302

    Abstract: A modular, compact and widely tunable laser system for the efficient generation of high peak and high average power ultrashort pulses. Modularity is ensured by the implementation of interchangeable amplifier components. System compactness is ensured by employing efficient fiber amplifiers, directly or indirectly pumped by diode lasers. Peak power handling capability of the fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive broadening is introduced by dispersive pulse stretching in the presence of self-phase modulation and gain, resulting in the formation of high-power parabolic pulses. In addition, dispersive broadening is also introduced by simple fiber delay lines or chirped fiber gratings, resulting in a further increase of the energy handling ability of the fiber amplifiers. The phase of the pulses in the dispersive delay line is controlled to quartic order by the use of fibers with varying amounts of waveguide dispersion or by controlling the chirp of the fiber gratings. After amplification, the dispersively stretched pulses can be re-compressed to nearly their bandwidth limit by the implementation of another set of dispersive delay lines. To ensure a wide tunability of the whole system, Raman-shifting of the compact sources of ultrashort pulses in conjunction with frequency-conversion in nonlinear optical crystals can be implemented, or an Anti-Stokes fiber in conjunction with fiber amplifiers and Raman-shifters are used. A particularly compact implementation of the whole system uses fiber oscillators in conjunction with fiber amplifiers. Additionally, long, distributed, positive dispersion optical amplifiers are used to improve transmission characteristics of an optical communication system. Finally, an optical communication system utilizes a Raman amplifier fiber pumped by a train of Raman-shifted, wavelength-tunable pump pulses, to thereby amplify an optical signal which counterpropogates within the Raman amplifier fiber with respect to the pump pulses.

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