利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

33 条记录 (耗时 0.019 秒)

    Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler
    3.
    发明申请
    Method and system for coherent beam combining using an integrated diffractive beam combiner and sampler 有权
    使用集成衍射光束组合器和采样器的相干光束组合的方法和系统

    公开(公告)号：US20080084598A1

    公开(公告)日：2008-04-10

    申请号：US11543677

    申请日：2006-10-05

    申请人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine

    发明人： Joshua E. Rothenberg ,  Robert R. Rice ,  Michael G. Wickham ,  Hiroshi Komine

    IPC分类号： G02F1/01

    CPC分类号： H01S3/2383 ,  B23K26/0604 ,  B23K26/0613 ,  H01S3/06754 ,  H01S3/10007

    摘要： A system and method for combining plural low power light beams into a coherent high power light beam by means of a diffractive optical element operating as both a beam combiner and beam sampler. An oscillation source transmits a master signal that is split into plural beams propagating at a common wavelength. Each beam is phase locked by a corresponding phase modulator according to a phase correction signal. The beams are directed through a fiber array to the diffractive optical element to allow efficient coherent combination of the beams at a desired diffraction order. The diffractive optical element includes a periodic sampling grating for diffracting a low power sample beam representative of the combined beam. A phase detection stage detects phases of constituent beams in the sample beam from which the phase correction signals are derived and fed back to the phase modulators. The diffractive optical element may be further modified to collimate beams diverging from the fiber array and to focus the sample beam onto a phase detector.

    摘要翻译： 一种通过用作光束组合器和光束取样器的衍射光学元件将多个低功率光束组合成相干高功率光束的系统和方法。 振荡源发送分割成以公共波长传播的多个波束的主信号。 每个光束根据相位校正信号由相应的相位调制器锁相。 光束通过光纤阵列引导到衍射光学元件，以允许以期望的衍射级别的光束的有效相干组合。 衍射光学元件包括用于衍射代表组合光束的低功率采样光束的周期性采样光栅。 相位检测级检测相位校正信号从中得到的采样光束中的构成光束的相位，并将其反馈到相位调制器。 可以进一步修改衍射光学元件以准直从光纤阵列发散的光束并将样品光束聚焦到相位检测器上。

    Distributed feedback laser apparatus for avoiding stimulated brillouin scattering
    5.
    发明授权
    Distributed feedback laser apparatus for avoiding stimulated brillouin scattering 有权
    用于避免受激布里渊散射的分布式反馈激光装置

    公开(公告)号：US06678294B1

    公开(公告)日：2004-01-13

    申请号：US09707219

    申请日：2000-11-06

    申请人： Hiroshi Komine ,  Stephen J. Brosnan ,  Michael G. Wickham

    发明人： Hiroshi Komine ,  Stephen J. Brosnan ,  Michael G. Wickham

    IPC分类号： H01S313

    CPC分类号： H01S3/2383 ,  H01S3/06754 ,  H01S3/1307 ,  H01S5/0622 ,  H01S2301/03

    摘要： A seed laser apparatus is disclosed. It comprises a distributed feedback laser system for transmitting a dithered optical signal having a frequency versus time characteristic that is represented by a triangular waveform and an optical medium including a plurality of optical signal paths, each path including an optical fiber and a fiber amplifier. The optical medium is characterized by stimulated Brillouin scattering (SBS) having a response time, whereby the period of the triangular waveform is equal to the round-trip transit time in the fiber or shorter than the response time of the SBS.

    摘要翻译： 公开了种子激光装置。 它包括分布反馈激光系统，用于发送具有由三角波形表示的频率对时间特性的抖动光信号和包括多个光信号路径的光学介质，每个路径包括光纤和光纤放大器。 光学介质的特征在于具有响应时间的受激布里渊散射（SBS），由此三角波形的周期等于光纤中的往返传播时间或短于SBS的响应时间。

    Scalable harmonic laser source and method
    6.
    发明授权
    Scalable harmonic laser source and method 有权
    可扩展谐波激光源和方法

    公开(公告)号：US07120175B2

    公开(公告)日：2006-10-10

    申请号：US10761747

    申请日：2004-01-20

    申请人： Joshua E. Rothenberg ,  Eric C. T. Cheung ,  Hiroshi Komine ,  Robert R. Rice ,  Michael G. Wickham

    发明人： Joshua E. Rothenberg ,  Eric C. T. Cheung ,  Hiroshi Komine ,  Robert R. Rice ,  Michael G. Wickham

    IPC分类号： H01S3/10

    CPC分类号： H01S5/14 ,  G02F1/37 ,  H01S3/06754 ,  H01S3/2383

    摘要： A laser array architecture scalable to very high powers by closely stacking fiber amplifiers, but in which the output wavelength is selectable to be in the visible or ultraviolet region, without being restricted by the wavelengths usually inherent in the choice of fiber materials. A pump signal at a fundamental frequency is amplified in the fiber amplifier array and input to an array of nonlinear crystals that function as harmonic generators, producing an output array at a desired harmonic of the fundamental frequency. A phase detection and correction system maintains the array of outputs in phase coherency, resulting in a high power output with high beam quality, at the desired frequency. The array of nonlinear crystals may a single array to produce a second harmonic output frequency, or a combination of multiple cascaded arrays configured to produce a selected higher order harmonic frequency.

    摘要翻译： 通过紧密地堆叠光纤放大器，但其中输出波长可选择在可见光或紫外区域的激光阵列结构可以扩展到非常高的功率，而不受光纤材料选择中通常固有的波长的限制。 基频的泵浦信号在光纤放大器阵列中被放大并输入到作为谐波发生器的非线性晶体阵列，产生基频的期望谐波的输出阵列。 相位检测和校正系统维持相位一致性的输出阵列，从而产生具有所需频率的高光束质量的高功率输出。 非线性晶体阵列可以是单个阵列以产生二次谐波输出频率，或者被配置为产生选定的较高次谐波频率的多个级联阵列的组合。

    Scalable wavelength shifted laser source and method
    8.
    发明授权
    Scalable wavelength shifted laser source and method 有权
    可扩展的波长偏移激光源和方法

    公开(公告)号：US07065110B2

    公开(公告)日：2006-06-20

    申请号：US10761723

    申请日：2004-01-20

    申请人： Robert R. Rice ,  Michael G. Wickham ,  Eric C. T. Cheung ,  Hiroshi Komine ,  Joshua E. Rothenberg

    发明人： Robert R. Rice ,  Michael G. Wickham ,  Eric C. T. Cheung ,  Hiroshi Komine ,  Joshua E. Rothenberg

    IPC分类号： H01S3/10

    CPC分类号： H01S3/1083 ,  G02F1/3534 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/2383

    摘要： A laser array architecture scalable to very high powers by fiber amplifiers, but in which the output wavelength is selectable, and not restricted by the wavelengths usually inherent in the choice of fiber materials. A pump beam at a first frequency is amplified in the fiber amplifier array and is mixed with a secondary beam at a second frequency to yield a frequency difference signal from each of an array of optical parametric amplifiers. A phase detection and correction system maintains the array of outputs from the amplifiers in phase coherency, resulting in a high power output at the desired wavelength. A degenerate form of the architecture is disclosed in an alternate embodiment, and a third embodiment employs dual wavelength fiber amplifiers to obtain an output at a desired difference frequency.

    摘要翻译： 激光阵列架构由光纤放大器可扩展到非常高的功率，但其中输出波长是可选择的，而不受通常选择光纤材料固有的波长的限制。 第一频率的泵浦光束在光纤放大器阵列中被放大，并且以第二频率与次级光束混合，以产生来自光学参量放大器阵列中的每一个的频差信号。 相位检测和校正系统保持来自放大器的输出阵列的相位一致性，导致在所需波长处的高功率输出。 在替代实施例中公开了该架构的简并形式，并且第三实施例采用双波长光纤放大器以期望的差频获得输出。

    Method and apparatus for optimizing the target intensity distribution transmitted from a fiber coupled array
    10.
    发明授权
    Method and apparatus for optimizing the target intensity distribution transmitted from a fiber coupled array 有权
    用于优化从光纤耦合阵列发送的目标强度分布的方法和装置

    公开(公告)号：US07283702B2

    公开(公告)日：2007-10-16

    申请号：US11227898

    申请日：2005-09-15

    申请人： Stephen J. Brosnan ,  Michael G. Wickham ,  Hiroshi Komine

    发明人： Stephen J. Brosnan ,  Michael G. Wickham ,  Hiroshi Komine

    IPC分类号： G02B6/32 ,  G02B3/02

    CPC分类号： G02B6/4296 ,  G02B6/32 ,  G02B6/4206 ,  G02B6/425 ,  G02B27/58

    摘要： Encircled far field energy is substantially increased by modifying the near field energy distribution of radiation from each fiber in an emitting array. Each beamlet output from a fiber is modified to have a generally uniform cross-sectional energy distribution, using a pair of aspheric optical elements selected for that purpose. The optical elements may be refractive or reflective. The modified beamlets combine to form a composite output beam with a generally uniform energy distribution. Preferably, the composite beam is subject to an array-wide inverse transformation to a near-Gaussian distribution, further enhancing the encircled far field energy and providing a more efficient high power laser source. Further gains in efficiency are achieved by selecting a fiber bundle pattern, lens array pattern and lens shape that together result in a high fill factor.

    摘要翻译： 通过改变来自发射阵列中每个光纤的辐射的近场能量分布，可以显着增加包围的远场能量。 使用为此目的选择的一对非球面光学元件，将从光纤输出的每个子束修改为具有大致均匀的横截面能量分布。 光学元件可以是折射的或反射的。 经修改的小束组合形成具有大致均匀能量分布的复合输出光束。 优选地，复合波束受到阵列宽的逆变换为近似高斯分布，进一步增强了包围的远场能量并提供了更有效的高功率激光源。 通过选择一起导致高填充因子的纤维束图案，透镜阵列图案和透镜形状来实现效率的进一步提高。