Fabrication of chirped fiber bragg gratings of any desired bandwidth using frequency modulation
    3.
    发明授权
    Fabrication of chirped fiber bragg gratings of any desired bandwidth using frequency modulation 有权
    使用频率调制制造任何所需带宽的啁啾光纤布拉格光栅

    公开(公告)号:US06728444B2

    公开(公告)日:2004-04-27

    申请号:US10066524

    申请日:2002-01-31

    IPC分类号: G02B634

    摘要: A method for manufacturing an optical waveguide refractive index grating having a desired grating pitch &Lgr;. The method includes the step of providing a photosensitive waveguide and a writing beam of actinic radiation, the writing beam having an intensity. The waveguide is translated relative to the writing beam at a velocity v(t). The intensity of the writing beam is modulated as a function of time at a frequency f(t), wherein v ⁢ ( t ) f ⁢ ( t ) ≈ Λ . The step of modulating the intensity of the writing beam as a function of time f(t) at a frequency f(t) including the step of varying &Lgr;.

    摘要翻译: 一种用于制造具有所需光栅间距Lambda的光波导折射率光栅的方法。 该方法包括提供光敏波导和光化辐射的写入光束的步骤,该写入光束具有强度。 波导以速度v(t)相对于书写光束平移。 写入光束的强度以频率f(t)作为时间的函数被调制,其中以包括步骤(f)的频率f(t)调制作为时间f(t)的函数的写入光束的强度的步骤 不同的Lambda。

    Method and apparatus for arbitrary spectral shaping of an optical pulse
    4.
    发明授权
    Method and apparatus for arbitrary spectral shaping of an optical pulse 有权
    用于光脉冲任意光谱整形的方法和装置

    公开(公告)号:US06195484B1

    公开(公告)日:2001-02-27

    申请号:US09401160

    申请日:1999-09-22

    IPC分类号: G02B634

    摘要: A method and an apparatus for stretching an optical pulse and shaping its spectrum. The method includes the step of: providing a an optical fiber element having a first long length fiber Bragg grating having a refractive index perturbation of varying periodicity. The optical pulse is launched into the fiber Bragg grating, wherein the Bragg grating reflects the pulse in a chromatically dispersed output. The reflected output is coupled with an optical modulator programmed to temporally modify the amplitude of the chromatically dispersed output to attenuate selected optical frequencies in a desired pattern. The apparatus for stretching and arbitrarily shaping the spectrum of an optical pulse with a desired wavelength resolution &Dgr;&lgr;res includes a routing optical device and an optical fiber element having a Bragg grating. The routing optical device routs energy between different waveguides, and has an input port to receive the optical pulse.

    摘要翻译: 一种用于拉伸光脉冲并使其光谱成形的方法和装置。 该方法包括以下步骤:提供具有具有变化周期性折射率扰动的第一长长度光纤布拉格光栅的光纤元件。 光脉冲被发射到光纤布拉格光栅中,其中布拉格光栅以色散分散的输出反射脉冲。 反射输出与光调制器耦合,该光调制器被编程为暂时地修改色散分散输出的幅度,以以期望的图形衰减选定的光频率。 用于以期望的波长分辨率DELTAlambdres拉伸和任意整形光脉冲的光谱的装置包括路由光学装置和具有布拉格光栅的光纤元件。 路由光学设备在不同波导之间排除能量,并具有用于接收光脉冲的输入端口。

    Long-length continuous phase Bragg reflectors in optical media
    5.
    发明授权
    Long-length continuous phase Bragg reflectors in optical media 有权
    光学介质中长长度连续相布拉格反射器

    公开(公告)号:US06404956B1

    公开(公告)日:2002-06-11

    申请号:US09161944

    申请日:1998-09-28

    IPC分类号: G02B634

    摘要: A long length continuous phase Bragg reflector and the method and an apparatus for writing the gratings into an optical fiber. The method includes the steps of providing a photosensitive optical fiber and a writing beam. A periodic intensity distribution of period &Lgr; is created from the writing beam and the optical fiber is translated relative to the intensity distribution at a velocity v(t). The intensity of the writing beam is modulated as a function of time at a frequency f(t), where. v(t)/f(t)≈&Lgr;. The intensity of the writing beam is varied further to control the envelope of the refractive index profile to write apodized gratings. The gratings measure at least 2.5 meters in length.

    摘要翻译: 一种长长度连续相布拉格反射器,以及用于将光栅写入光纤的方法和装置。 该方法包括提供光敏光纤和书写光束的步骤。 从写入光束产生周期LAMBD的周期强度分布,并且光纤以速度v(t)相对于强度分布平移。 写入光束的强度作为时间的函数在频率f(t)被调制,其中。 v(t)/ f(t)≈LAMBD。 写入光束的强度进一步变化,以控制折射率分布的包络以写入变迹光栅。 光栅长度至少为2.5米。

    Method for writing arbitrary index perturbations in a wave-guiding
structure
    6.
    发明授权
    Method for writing arbitrary index perturbations in a wave-guiding structure 失效
    在波导结构中写任意指数扰动的方法

    公开(公告)号:US6035083A

    公开(公告)日:2000-03-07

    申请号:US110495

    申请日:1998-07-06

    摘要: A method and an apparatus for writing arbitrary refractive index perturbations along an optical waveguide. The method includes the steps of providing a waveguide having a photosensitive region and providing a writing beam of actinic radiation having a nominal diameter D, the writing beam defining an optical axis. A waveguide is translated relative to the optical axis of the writing beam at a known velocity v(t). A modulator modulates the radiation intensity I(t) of the writing beam as a function of time t to deliver a fluence of radiation, .PHI.(x), directly to the waveguide, wherein ##EQU1## The refractive index change .DELTA.n.sub.(x) at a position x along the waveguide length is related to the fluence delivered to that position as, .DELTA.n.sub.(x) =C.multidot..PHI..sub.(x), wherein C is a scaling factor that accounts for the photosensitivity of the waveguide.

    摘要翻译: 一种用于沿光波导写任意折射率扰动的方法和装置。 该方法包括以下步骤:提供具有感光区域的波导,并提供具有标称直径D的光束辐射的写入光束,该写入光束限定光轴。 以已知的速度v(t)相对于写入光束的光轴平移波导。 调制器调制作为时间t的函数的写入光束的辐射强度I(t),以将辐射能量PHI(x)直接传递到波导,其中折射率在位置处改变DELTA n(x) 沿着波导长度的x与递送到该位置的能量密度相关,如DELTA n(x)= Cx PHI(x),其中C是考虑波导的光敏性的比例因子。

    Quality review method for optical components using a fast system performance characterization
    9.
    发明授权
    Quality review method for optical components using a fast system performance characterization 失效
    使用快速系统性能表征的光学元件的质量评估方法

    公开(公告)号:US06781698B2

    公开(公告)日:2004-08-24

    申请号:US10237325

    申请日:2002-09-09

    IPC分类号: G01B902

    CPC分类号: G01M11/333 G01M11/335

    摘要: A method for screening the quality of an optical component including the step of simulating the performance of the optical component. The step of simulating includes the step of measuring the optical phase &phgr; of the optical component, wherein the step of measuring comprises indirectly measuring the optical phase &phgr; of the optical component using a scanning laser having a scanning step size &Dgr;&ohgr; and a modulation frequency &ohgr;m such that &Dgr;&ohgr;/&ohgr;m≦2. The light throughput R of the optical component is then measured. A transfer function H as a function of optical frequency &ohgr; is constructed where H(&ohgr;)=R(&ohgr;)exp[j&phgr;(&ohgr;)], and the performance is simulated using the measured value of the optical phase and the light throughput into the transfer function.

    摘要翻译: 一种用于筛选光学部件的质量的方法,包括模拟光学部件的性能的步骤。 模拟步骤包括测量光学部件的光学相位phi的步骤,其中测量步骤包括使用具有扫描步长尺寸Deltaomega和调制频率ωgam的扫描激光器间接测量光学部件的光学相位phi Deltaomega / omegam <= 2。 然后测量光学部件的光通过量R. 构建其中H(ω)= R(ω)exp [jphi(ω)]的作为光频率ω的函数的传递函数H,并且使用光相位的测量值和光通量 传递函数。

    Bragg fibers in systems for the generation of high peak power light
    10.
    发明授权
    Bragg fibers in systems for the generation of high peak power light 有权
    布拉格光纤在系统中产生高峰值功率灯

    公开(公告)号:US07593441B2

    公开(公告)日:2009-09-22

    申请号:US12008036

    申请日:2008-01-07

    IPC分类号: H01S3/10 H01S3/13

    摘要: The present invention generally concerns the use of Bragg optical fibers in chirped pulse amplification systems for the production of high-pulse-energy ultrashort optical pulses. A gas-core Bragg optical fiber waveguide can be advantageously used in such systems to stretch the duration of pulses so that they can be amplified, and/or Bragg fibers can be used to compress optical signals into much shorter duration pulses after they have been amplified. Bragg fibers can also function as near-zero-dispersion delay lines in amplifier sections.

    摘要翻译: 本发明一般涉及在啁啾脉冲放大系统中使用布拉格光纤用于生产高脉冲能量超短脉冲光脉冲。 气体布拉格光纤波导可以在这样的系统中有利地用于延长脉冲的持续时间以便它们被放大,和/或布拉格光纤可以用于在光信号被放大之后将光信号压缩成更短的持续时间脉冲 。 布拉格光纤也可以用作放大器部分中的近零色散延迟线。