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    Ultrashort laser micro-texture printing
    144.
    发明授权
    Ultrashort laser micro-texture printing 有权
    超短激光微纹理印刷

    公开(公告)号：US08670151B2

    公开(公告)日：2014-03-11

    申请号：US13799754

    申请日：2013-03-13

    Applicant: IMRA America, Inc.

    Inventor： Lawrence Shah ,  Martin E. Fermann

    IPC: G06K1/00

    CPC classification number: G06K15/1209 ,  B41J2/442 ,  B41J2/471 ,  G06K15/129 ,  H04N1/40037 ,  H04N1/407

    Abstract: Systems and methods for providing laser texturing of solid substrates are disclosed. The texturing may be used to provide grayscale images obtainable from substrates, which may include steel, aluminum, glass, and silicon. In some embodiments, images may be obtainable from the substrate by modifying the reflective, diffractive, and/or absorptive features of the substrate or the substrate surface by forming random, periodic, and/or semi-periodic micro-structure features on the substrate (or substrate surface) by an ultrafast laser pulse train. The ultrafast pulse train may be modulated in order to vary, for example, optical exposure time, pulse train intensity, laser polarization, laser wavelength, or a combination of the aforementioned. The ultrafast pulse train and the substrate may be scanned with respect to each other to provide different optical energies to different regions of the substrate (or substrate surface). In some embodiments, the image is provided by making one or more passes of the ultrafast laser pulse train relative to the substrate.

    Abstract translation: 公开了用于提供固体基底的激光纹理化的系统和方法。 纹理可以用于提供可从包括钢，铝，玻璃和硅的基底获得的灰度图像。 在一些实施例中，可以通过在衬底上形成随机，周期性和/或半周期微结构特征来修饰衬底或衬底表面的反射，衍射和/或吸收特征，从衬底获得图像（ 或基板表面）。 为了改变例如光学曝光时间，脉冲串强度，激光偏振，激光波长或上述的组合，可以调制超快脉冲串。 可以相对于彼此扫描超快速脉冲串和衬底，以向衬底（或衬底表面）的不同区域提供不同的光学能量。 在一些实施例中，通过相对于衬底进行超快激光脉冲串的一次或多次通过来提供图像。

    MODULAR, HIGH ENERGY, WIDELY-TUNABLE ULTRAFAST FIBER SOURCE
    145.
    发明申请
    MODULAR, HIGH ENERGY, WIDELY-TUNABLE ULTRAFAST FIBER SOURCE 审中-公开
    模块化，高能量，宽带超导纤维源

    公开(公告)号：US20140036939A1

    公开(公告)日：2014-02-06

    申请号：US13958703

    申请日：2013-08-05

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. FERMANN

    IPC: H01S3/11

    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. Peak power handling capability of fiber amplifiers is expanded by using optimized pulse shapes, as well as dispersively broadened pulses. Dispersive pulse stretching in the presence of self-phase modulation and gain results in the formation of high-power parabolic pulses. 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. Positive dispersion optical amplifiers are used to improve transmission characteristics. 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 counterpropagates within the Raman amplifier fiber with respect to the pump pulses.

    Abstract translation: 一种模块化，紧凑且广泛可调的激光系统，用于高效生成高峰值和高平均功率超短脉冲。 通过使用优化的脉冲形状以及分散加宽的脉冲来扩展光纤放大器的峰值功率处理能力。 在存在自相位调制和增益的情况下的分散脉冲拉伸导致高功率抛物线脉冲的形成。 为了确保整个系统的广泛可调性，可以实现超短脉冲的紧凑型源与非线性光学晶体中的频率转换的拉曼移位，或者与光纤放大器和拉曼移位器结合的反斯托克斯光纤是 用过的。 正色散光放大器用于提高传输特性。 光通信系统利用由一系列拉曼移位的波长可调泵浦脉冲泵浦的拉曼放大器光纤，从而放大相对于泵浦脉冲在拉曼放大器光纤内反向传播的光信号。

    P-TYPE SEMICONDUCTOR ZINC OXIDE FILMS PROCESS FOR PREPARATION THEREOF, AND PULSED LASER DEPOSITION METHOD USING TRANSPARENT SUBSTRATES
    146.
    发明申请
    P-TYPE SEMICONDUCTOR ZINC OXIDE FILMS PROCESS FOR PREPARATION THEREOF, AND PULSED LASER DEPOSITION METHOD USING TRANSPARENT SUBSTRATES 审中-公开
    P型半导体氧化锌膜及其制备方法，以及使用透明基板的脉冲激光沉积方法

    公开(公告)号：US20140017416A1

    公开(公告)日：2014-01-16

    申请号：US14025418

    申请日：2013-09-12

    Applicant: IMRA AMERICA, INC.

    Inventor： Bing LIU ,  Zhendong Hu ,  Yong Che ,  Yuzuru Uehara

    IPC: C23C14/22

    CPC classification number: C23C14/22 ,  C23C14/083 ,  C23C14/28

    Abstract: A p-type semiconductor zinc oxide (ZnO) film and a process for preparing the film are disclosed. The film is co-doped with phosphorous (P) and lithium (Li). A pulsed laser deposition scheme is described for use in growing the film. Further described is a process of pulsed laser deposition using transparent substrates which includes a pulsed laser source, a substrate that is transparent at the wavelength of the pulsed laser, and a multi-target system. The optical path of the pulsed laser is arranged in such a way that the pulsed laser is incident from the back of the substrate, passes through the substrate, and then focuses on the target. By translating the substrate towards the target, this geometric arrangement enables deposition of small features utilizing the root of the ablation plume, which can exist in a one-dimensional transition stage along the target surface normal, before the angular width of the plume is broadened by three-dimensional adiabatic expansion. This can provide small deposition feature sizes, which can be similar in size to the laser focal spot, and provides a novel method for direct deposition of patterned materials.

    Abstract translation: 公开了一种p型半导体氧化锌（ZnO）膜及其制备方法。 该膜与磷（P）和锂（Li）共掺杂。 描述脉冲激光沉积方案用于生长膜。 进一步描述的是使用透明衬底的脉冲激光沉积过程，其包括脉冲激光源，在脉冲激光的波长处是透明的衬底和多目标系统。 脉冲激光器的光路布置成使得脉冲激光从衬底的背面入射，穿过衬底，然后聚焦在靶上。 通过将基板朝向目标平移，这种几何布置可以在羽流的角宽度扩大之前利用消融羽流的根部沉积小特征，其可以沿着目标表面法线存在于一维过渡阶段中 三维绝热膨胀。 这可以提供小的沉积特征尺寸，其尺寸可以与激光焦点类似，并且提供用于直接沉积图案化材料的新颖方法。

    WIDE BANDWIDTH, LOW LOSS PHOTONIC BANDGAP FIBERS
    149.
    发明申请
    WIDE BANDWIDTH, LOW LOSS PHOTONIC BANDGAP FIBERS 审中-公开

    公开(公告)号：US20130294736A1

    公开(公告)日：2013-11-07

    申请号：US13915404

    申请日：2013-06-11

    Applicant: IMRA America, Inc.

    Inventor： Liang Dong ,  Brian K. Thomas ,  Shigeru Suzuki ,  Libin Fu

    IPC: G02B6/032 ,  G02B6/024

    CPC classification number: G02B6/032 ,  B29D11/00663 ,  G02B6/02328 ,  G02B6/02347 ,  G02B6/024

    Abstract: Various embodiments include photonic bandgap fibers (PBGF). Some PBGF embodiments have a hollow core (HC) and may have a square lattice (SQL). In various embodiments, SQL PBGF can have a cladding region including 2-10 layers of air-holes. In various embodiments, an HC SQL PBGF can be configured to provide a relative wavelength transmission window Δλ/λc larger than about 0.35 and a minimum transmission loss in a range from about 70 dB/km to about 0.1 dB/km. In some embodiments, the HC SQL PBGF can be a polarization maintaining fiber. Methods of fabricating PBGF are also disclosed along with some examples of fabricated fibers. Various applications of PBGF are also described.

    OPTICAL FREQUENCY RULER
    150.
    发明申请
    OPTICAL FREQUENCY RULER 审中-公开
    光学频率规则

    公开(公告)号：US20130293946A1

    公开(公告)日：2013-11-07

    申请号：US13873869

    申请日：2013-04-30

    Applicant: IMRA AMERICA, INC.

    Inventor： Martin E. FERMANN ,  Ingmar HARTL

    IPC: G02F1/39

    CPC classification number: G02F1/39 ,  H01S3/0092 ,  H01S3/2308 ,  H01S3/2383

    Abstract: The present invention relates to frequency rulers. At least one embodiment includes a mode locked pump source operated at pulse repetition rate, and a pump output having a pump carrier envelope offset frequency. A nonlinear optical system outputs a frequency ruler spectrum comprising individual frequency modes. The frequency modes may be characterized by a frequency spacing which is an integer multiple of the repetition rate and by distinct ruler carrier envelope offset frequencies which exhibit at least one discontinuity across the frequency output. The ruler carrier envelope offset frequencies are substantially locked to the carrier envelope offset frequency of the pump laser. One preferred embodiment includes a frequency doubled, doubly resonant, non-degenerate OPO (DNOPO), a supercontinuum generation (SC) stage and at least one reference laser arranged downstream from a Tm fiber-based pump source. A plurality of beat signals generated therefrom provide for stabilization of the system.

    Abstract translation: 本发明涉及频率标尺。 至少一个实施例包括以脉冲重复率操作的模式锁定泵浦源，以及具有泵载波包络偏移频率的泵输出。 非线性光学系统输出包括各种频率模式​​的频率标尺。 频率模式的特征在于频率间隔是重复率的整数倍，并且通过不同的标尺载波包络偏移频率来表征，该频率间隔在频率输出端表现出至少一个不连续性。 标尺载波包络偏移频率基本上锁定在泵浦激光器的载波包络偏移频率上。 一个优选实施例包括频率倍增，双谐振，非简并OPO（DNOPO），超连续谱产生（SC）级和布置在Tm纤维基泵浦下游的至少一个参考激光器。 由此产生的多个拍子信号提供了系统的稳定性。

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