中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

31 records (took 0.027 seconds)

    STABLE DIFFERENCE FREQUENCY GENERATION USING FIBER LASERS
    21.
    发明申请
    STABLE DIFFERENCE FREQUENCY GENERATION USING FIBER LASERS 审中-公开
    用光纤激光器产生稳定的差分频率

    公开(公告)号：WO2017209989A1

    公开(公告)日：2017-12-07

    申请号：PCT/US2017/033549

    申请日：2017-05-19

    Applicant: IMRA AMERICA, INC.

    Inventor： LEE, Kevin, F. ,  FERMANN, Martin, E.

    IPC: G02F1/01 ,  G02F1/35 ,  H01S3/067 ,  G02B26/00

    Abstract: Systems and methods for stabilizing mid-infrared light generated by difference frequency mixing may include a mode locked Er fiber laser that generates pulses, which are split into a pump arm and a wavelength shifting, signal arm. Pump arm pulses are amplified in Er doped fiber. Shifting arm pulses are amplified in Er doped fiber and shifted to longer wavelengths in Raman- shifting fiber or highly nonlinear fiber, where they may be further amplified by Tm doped fiber, and then optionally further wavelength shifted. Pulses from the two arms can be combined in a nonlinear crystal such as orientation-patterned gallium phosphide, producing a mid-infrared difference frequency, as well as nonlinear combinations (e.g., sum frequency) having near infrared and visible wavelengths. Optical power stabilization can be achieved using two wavelength ranges with spectral filtering and multiple detectors acquiring information for feedback control. Controlled fiber bending can be used to stabilize optical power.

    Abstract translation: 用于稳定由差频混频产生的中红外光的系统和方法可以包括产生脉冲的锁模Er光纤激光器，其被分成泵臂和波长偏移信号臂。 在铒掺杂光纤中放大泵臂脉冲。 移动臂脉冲在铒掺杂光纤中被放大，并且在拉曼位移光纤或高度非线性光纤中被移位到更长波长，其中它们可以被Tm掺杂光纤进一步放大，然后可选地进一步波长移位。 来自两个臂的脉冲可以组合成非线性晶体，例如定向图案化的磷化镓，产生中红外差频以及具有近红外和可见光波长的非线性组合（例如和频）。 光功率稳定可以使用两个波长范围与光谱过滤和多个检测器获取反馈控制信息来实现。 受控光纤弯曲可以用来稳定光功率。

    SYSTEMS AND METHODS FOR LOW NOISE FREQUENCY MULTIPLICATION, DIVISION, AND SYNCHRONIZATION
    22.
    发明申请
    SYSTEMS AND METHODS FOR LOW NOISE FREQUENCY MULTIPLICATION, DIVISION, AND SYNCHRONIZATION 审中-公开
    低噪声频率乘法，部分和同步的系统和方法

    公开(公告)号：WO2016164263A1

    公开(公告)日：2016-10-13

    申请号：PCT/US2016/025527

    申请日：2016-04-01

    Applicant: IMRA AMERICA, INC.

    Inventor： FERMANN, Martin, E. ,  KUSE, Naoya

    IPC: H03B17/00 ,  H01S3/00 ,  H01S3/067 ,  H01S3/107 ,  H01S3/11 ,  H01S3/13 ,  H01S3/136 ,  H01S3/23

    CPC classification number: H01S3/1304 ,  H01S3/0014 ,  H01S3/0057 ,  H01S3/0078 ,  H01S3/0085 ,  H01S3/0092 ,  H01S3/06712 ,  H01S3/06791 ,  H01S3/107 ,  H01S3/1118 ,  H01S3/1305 ,  H01S3/1306 ,  H01S3/1307 ,  H01S3/136 ,  H01S3/2391 ,  H03B17/00 ,  H03B2200/009 ,  H03D7/14 ,  H03F3/08 ,  H03L7/24

    Abstract: Low phase noise radio frequency (RF) sources generated by voltage controlled oscillators (VCOs) are described. Optical modulators driven by a VCO may be used to generate optical side-bands to cw lasers. The spectral extent of said side-bands can be increased via frequency broadening in highly nonlinear waveguides. Free running mode locked low phase noise comb oscillators can be used as reference oscillators to generate beat signals between those side-bands and individual comb modes at distal spectral regions, thereby creating an error signal used to reduce the phase noise of VCOs and the generation of low phase noise RF signals. VCO phase noise may be reduced by using free-running modelocked comb lasers phase locked to external frequency references, by omitting a reference comb and using a nonlinear interferometer for generating an error signal, or by locking a slave comb to the modulation frequency of an intra-cavity modulator driven by the VCO.

    Abstract translation: 描述了由压控振荡器（VCO）产生的低相位噪声射频（RF）源。 由VCO驱动的光调制器可用于产生cw激光器的光学边带。 可以通过高度非线性波导中的频率扩展来增加所述边带的频谱范围。 自由运行模式锁定低相位噪声梳状振荡器可用作参考振荡器，以在远端光谱区域之间的这些边带与各个梳状模式之间产生拍频信号，从而产生用于降低VCO相位噪声的误差信号， 低相位噪声RF信号。 可以通过使用锁相到外部频率参考的自由运行模式锁定梳状激光器，通过省略参考梳和使用非线性干涉仪来产生误差信号，或者通过将从属梳锁定到内部的调制频率来减小VCO相位噪声 由VCO驱动的腔调制器。

    OPTICAL SCANNING AND IMAGING SYSTEMS BASED ON DUAL PULSED LASER SYSTEMS
    23.
    发明申请
    OPTICAL SCANNING AND IMAGING SYSTEMS BASED ON DUAL PULSED LASER SYSTEMS 审中-公开
    基于双脉冲激光系统的光学扫描和成像系统

    公开(公告)号：WO2010101690A1

    公开(公告)日：2010-09-10

    申请号：PCT/US2010/023123

    申请日：2010-02-04

    Applicant: IMRA AMERICA, INC. ,  FERMANN, Martin, E. ,  HARTL, Ingmar

    Inventor： FERMANN, Martin, E. ,  HARTL, Ingmar

    IPC: H01S3/23

    CPC classification number: H01S3/10046 ,  G01B9/02001 ,  G01N21/31 ,  G01N2021/317 ,  G02B6/02304 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/08054 ,  H01S3/1067 ,  H01S3/1068 ,  H01S3/11 ,  H01S3/1115 ,  H01S3/13 ,  H01S3/1307 ,  H01S3/1392 ,  H01S3/1394 ,  H01S3/2383

    Abstract: The invention relates to scanning pulsed laser systems for optical imaging. Coherent dual scanning laser systems (CDSL) are disclosed and some applications thereof. Various alternatives for implementation are illustrated, including highly integrated configurations. In at least one embodiment a coherent dual scanning laser system (CDSL) includes two passively modelocked fiber oscillators. The oscillators are configured to operate at slightly different repetition rates, such that a difference fr in repetition rates is small compared to the values fr1 and fr2 of the repetition rates of the oscillators. The CDSL system also includes a non-linear frequency conversion section optically connected to each oscillator. The section includes a non-linear optical element generating a frequency converted spectral output having a spectral bandwidth and a frequency comb comprising harmonics of the oscillator repetition rates. A CDSL may be arranged in an imaging system for one or more of optical imaging, microscopy, micro-spectroscopy and/or THz imaging.

    Abstract translation: 本发明涉及用于光学成像的扫描脉冲激光系统。 公开了相干双扫描激光系统（CDSL）及其一些应用。 示出了用于实现的各种替代方案，包括高度集成的配置。 在至少一个实施例中，相干双扫描激光系统（CDSL）包括两个被动锁模光纤振荡器。 振荡器被配置为以稍微不同的重复率操作，使得与振荡器的重复率的值fr1和fr2相比，重复率的差fr小。 CDSL系统还包括与每个振荡器光学连接的非线性频率转换部分。 该部分包括产生具有频谱带宽的频率转换频谱输出和包括振荡器重复频率的谐波的频率梳的非线性光学元件。 可以在成像系统中布置CDSL以用于光学成像，显微镜，微光谱和/或THz成像中的一种或多种。

    ULTRASHORT LASER MICRO-TEXTURE PRINTING
    24.
    发明申请
    ULTRASHORT LASER MICRO-TEXTURE PRINTING 审中-公开
    ULTRASHORT激光微纹理印刷

    公开(公告)号：WO2008091898A1

    公开(公告)日：2008-07-31

    申请号：PCT/US2008/051713

    申请日：2008-01-22

    Applicant: IMRA AMERICA, INC. ,  SHAH, Lawrence ,  FERMANN, Martin, E.

    Inventor： SHAH, Lawrence ,  FERMANN, Martin, E.

    IPC: B41J2/47

    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 micro-structure features may have average sizes slightly larger, comparable to, and/or smaller than the wavelength of light of the ultrafast 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 micro-structure features may be modified by controlling the environment near the substrate (e.g., the atmosphere, which may include reactive chemical species in some embodiments). In some embodiments, the micro-structure may be fixed for long-term preservation using enamel and/or polymer or other overcoats. 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改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）。 微结构特征可以具有比超快脉冲序列的光的波长稍微大一点，和/或小于其的波长的平均尺寸。 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。 微结构特征可以通过控制衬底附近的环境（例如，在一些实施方案中可能包括反应性化学物质的大气）来改变。 在一些实施方案中，微结构可以使用搪瓷和/或聚合物或其它外涂层固定以进行长期保存。 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。 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。

Patent Agency Ranking