Magnetostrictively tunable optical fiber gratings
    1.
    发明授权
    Magnetostrictively tunable optical fiber gratings 失效
    磁致伸缩可调谐光纤光栅

    公开(公告)号:US5812711A

    公开(公告)日:1998-09-22

    申请号:US791083

    申请日:1997-01-29

    摘要: In accordance with the invention, a tunable fiber grating comprises a fiber grating secured to a magnetostrictive body so that magnetostrictive strain will be transmitted to the grating. An electromagnet is disposed adjacent the magnetostrictive body for applying a magnetic field along the body. Control of the current applied to the electromagnet permits control of the strain transmitted to the fiber grating, and thus control of the grating spacing and reflection frequency. In a preferred embodiment the magnetostrictive body is cylinder bonded along the grating. In alternative arrangements, the magnetostrictive effect can be mechanically amplified. An add/drop multiplexer employing the tunable gratings is described.

    摘要翻译: 根据本发明,可调谐光纤光栅包括固定到磁致伸缩体的光纤光栅,使得磁致伸缩应变将传输到光栅。 电磁体设置在与磁致伸缩体相邻的位置,用于沿着主体施加磁场。 控制施加到电磁体的电流允许控制传输到光纤光栅的应变,从而控制光栅间隔和反射频率。 在优选实施例中,磁致伸缩体沿着光栅圆柱体连接。 在替代布置中,可以机械地放大磁致伸缩效应。 描述了采用可调谐光栅的分插复用器。

    Magnetically tunable optical fiber gratings
    2.
    发明授权
    Magnetically tunable optical fiber gratings 失效
    磁调谐光纤光栅

    公开(公告)号:US5781677A

    公开(公告)日:1998-07-14

    申请号:US791081

    申请日:1997-01-29

    摘要: In accordance with the invention, a tunable fiber grating comprises a fiber grating secured between a pair of magnets so that magnetic force (repulsive or attractive) applied to the magnets is transmitted to the grating. An electromagnet is disposed adjacent the magnets for applying the field to magnetize them. Control of the current applied to the electromagnet permits control of the force transmitted to the fiber grating and, thus, control of the grating strain, spacing and reflection frequency. In a preferred embodiment the electromagnet is actuated to produce magnetic pulses which control the remanent force between the two magnets, eliminating the need for continuous power. An add/drop multiplexer employing the tunable gratings is described.

    摘要翻译: 根据本发明,可调谐光纤光栅包括固定在一对磁体之间的光纤光栅,使得施加到磁体的磁力(排斥或吸引力)传输到光栅。 电磁体设置在磁体附近以施加磁场以磁化它们。 控制施加到电磁体的电流允许控制传递到光纤光栅的力,并且因此控制光栅应变,间隔和反射频率。 在优选实施例中,电磁体被致动以产生控制两个磁体之间的剩余力的磁脉冲,消除了对连续功率的需要。 描述了采用可调谐光栅的分插复用器。

    Tunable long-period optical grating device and optical systems employing
same
    3.
    发明授权
    Tunable long-period optical grating device and optical systems employing same 失效
    可调谐长周期光栅装置和采用其的光学系统

    公开(公告)号:US5999671A

    公开(公告)日:1999-12-07

    申请号:US957956

    申请日:1997-10-27

    IPC分类号: G02B6/34

    摘要: A device and method for dynamically tuning a long-period grating of an optical fiber is disclosed. The grating is made tunable by using a controlled strain imposed on the fiber adjacent the grating, wherein the strain comprises an electromechanical force, magnetostrictive force, magnetic force, or a thermally-induced force. An improved optical communication system comprising a dynamically gain-equalized amplifier device, a wavelength feedback device, and the tunable long-period grating device is also disclosed. In the communications system, the grating device is reconfigured to have a desired broadband filtering frequency, thus equalizing the amplifier gain, in response to feedback from the wavelength detector.

    摘要翻译: 公开了一种用于动态调谐光纤的长周期光栅的装置和方法。 通过使用施加在光栅附近的光纤上的受控应变来使光栅可调,其中该应变包括机电力,磁致伸缩力,磁力或热诱导力。 还公开了一种包括动态增益均衡放大器装置,波长反馈装置和可调谐长周期光栅装置的改进的光通信系统。 在通信系统中,光栅装置被重新配置为具有期望的宽带滤波频率,因此响应于来自波长检测器的反馈而均衡放大器增益。

    Temperature-compensated optical fiber gratings with fine wavelength
tuning
    4.
    发明授权
    Temperature-compensated optical fiber gratings with fine wavelength tuning 失效
    具有精细波长调谐的温度补偿光纤光栅

    公开(公告)号:US6101301A

    公开(公告)日:2000-08-08

    申请号:US62339

    申请日:1998-04-17

    IPC分类号: G02B6/34

    CPC分类号: G02B6/022 G02B6/0218

    摘要: A temperature compensated optical fiber grating device comprises a longitudinally extending optical fiber grating having a length and a packaging assembly for the grating comprising a first longitudinally extending body of material having a first coefficient of thermal expansion (CTE) and second and third longitudinally extending bodies of material having CTE's lower than the first CTE. The three bodies are mechanically attached at alternate ends to form a composite structure having an effective negative CTE between two ends to which the grating is attached. The resulting grating device can be made in compact form having an overall length less than 30% more than the grating (and preferably less than 10%) and can reduce the temperature dependent wavelength change in the grating to less than 0.2 nm/100.degree. C. and preferably less than 0.05 nm/100.degree. C. In a preferred embodiment, the packaging bodies include a cylinder enclosing the grating.

    摘要翻译: 温度补偿光纤光栅装置包括具有长度的纵向延伸的光纤光栅和用于光栅的包装组件,其包括具有第一热膨胀系数(CTE)的第一纵向延伸的材料体,以及第二和第三纵向延伸体 CTE低于第一个CTE的材料。 这三个机构在交替的端部机械地连接以形成复合结构,该复合结构在光栅所连接的两端之间具有有效的负CTE。 所得到的光栅装置可以制成紧凑形式,其整体长度小于光栅的30%(优选小于10%),并且可以将光栅中的温度相关波长变化降低到小于0.2nm / 100℃ ,优选小于0.05nm / 100℃。在优选实施例中,包装体包括封闭光栅的圆柱体。

    Device for tuning wavelength response of an optical fiber grating
    5.
    发明授权
    Device for tuning wavelength response of an optical fiber grating 失效
    用于调谐光纤光栅的波长响应的装置

    公开(公告)号:US5987200A

    公开(公告)日:1999-11-16

    申请号:US957953

    申请日:1997-10-27

    IPC分类号: G02B6/34 G02F1/01 H04J14/00

    摘要: A tunable fiber grating comprises a temperature-sensitive body secured to a fiber having a fiber grating region for transmitting thermally-induced strain to the grating. The amount of strain and hence the degree of wavelength tuning are controlled by adjusting the temperature of the temperature-sensitive body, wherein the extent of adjustment is preferably pre-determined according to feedback from a wavelength detector. Large thermal strains obtainable with the present invention allow a wide range of wavelength tuning with a relatively small and convenient temperature change near ambient temperature. In a preferred embodiment, the temperature-sensitive body is cylindrical and comprised of a nickel-titanium alloy bonded to the grating. In alternative arrangements, the thermal strain effect can be amplified. An add/drop multiplexer employing the tunable gratings is also described.

    摘要翻译: 可调光纤光栅包括固定到具有用于将热致应变传递到光栅的光纤光栅区域的光纤的感温体。 通过调节温度敏感体的温度来控制应变量和因此的波长调谐程度,其中调节范围优选根据来自波长检测器的反馈来预先确定。 通过本发明可获得的大的热应变允许在环境温度附近具有相对较小且方便的温度变化的宽范围的波长调谐。 在优选实施例中,感温体是圆柱形的并且由结合到光栅的镍 - 钛合金构成。 在替代布置中,可以放大热应变效应。 还描述了采用可调谐光栅的分插复用器。

    Article comprising metal oxide nanostructures
    6.
    发明授权
    Article comprising metal oxide nanostructures 失效
    文章包含金属氧化物纳米结构

    公开(公告)号:US08659217B2

    公开(公告)日:2014-02-25

    申请号:US11892737

    申请日:2007-08-27

    IPC分类号: H01J1/62

    摘要: This invention includes field emitters, in particular, electron field emitters with metal oxide nanoscale, aligned and sharped-tip emitter structures, the metal oxide emitter structures being a plurality of carbon nanostructures supported by and projecting from a substrate and including a metal oxide coating overlying the surfaces of the plurality of carbon nanostructures.

    摘要翻译: 本发明包括场致发射体,特别是具有金属氧化物纳米尺度,排列和锐尖发射极结构的电子场发射体,金属氧化物发射体结构是多个碳纳米结构,由碳纳米结构支撑并从衬底突出,并包括覆盖上面的金属氧化物涂层 多个碳纳米结构的表面。

    Articles comprising high-electrical-conductivity nanocomposite material and method for fabricating same
    9.
    发明授权
    Articles comprising high-electrical-conductivity nanocomposite material and method for fabricating same 有权
    包含高导电性纳米复合材料的制品及其制造方法

    公开(公告)号:US07959830B2

    公开(公告)日:2011-06-14

    申请号:US10584680

    申请日:2004-12-23

    申请人: Sungho Jin

    发明人: Sungho Jin

    摘要: This invention discloses novel nanocomposite material structures which are strong, highly conductive, and fatigue-resistant. It also discloses novel fabrication techniques to obtain such structures. The new nanocomposite materials comprise a high-conductivity base metal, such as copper, incorporating high-conductivity dispersoid particles that simultaneously minimize field enhancements, maintain good thermal conductivity, and enhance mechanical strength. The use of metal nanoparticles with electrical conductivity comparable to that of the base automatically removes the regions of higher RF field and enhanced current density. Additionally, conductive nanoparticles will reduce the surface's sensitivity to arc or sputtering damage. If the surface is sputtered away to uncover the nanoparticles, their properties will not be dramatically different from the base surface. Most importantly, the secondary electron emission coefficients of all materials in the nanocomposite are small and close to unity, whereas the previously used insulating particles can produce significant and undesirable electron multiplication.

    摘要翻译: 本发明公开了具有强的,高导电性和耐疲劳性的新型纳米复合材料结构。 它还公开了获得这种结构的新型制造技术。 新的纳米复合材料包括高导电性贱金属(例如铜),其结合了高导电性分散质颗粒,同时最小化场增强,保持良好的导热性和增强机械强度。 使用具有与碱性电导率相当的导电性的金属纳米粒子自动去除较高RF场的区域和增强的电流密度。 另外,导电纳米颗粒将降低表面对电弧或溅射损伤的敏感性。 如果表面被溅射以揭开纳米颗粒,它们的性质将不会与基底表面显着不同。 最重要的是,纳米复合材料中所有材料的二次电子发射系数很小,接近于单一,而先前使用的绝缘颗粒可以产生显着和不期望的电子倍增。

    Probe system comprising an electric-field-aligned probe tip and method for fabricating the same
    10.
    发明授权
    Probe system comprising an electric-field-aligned probe tip and method for fabricating the same 有权
    包括电场对准探针尖端的探针系统及其制造方法

    公开(公告)号:US07735147B2

    公开(公告)日:2010-06-08

    申请号:US12088223

    申请日:2006-10-10

    IPC分类号: H01J37/06

    摘要: A mechanically stable and oriented scanning probe tip comprising a carbon nanotube having a base with gradually decreasing diameter, with a sharp tip at the probe tip. Such a tip or an array of tips is produced by depositing a catalyst metal film on a substrate (10 & 12 in FIG. 1(a)), depositing a carbon dot (14 in FIG. 1(b)) on the catalyst metal film, etching away the catalyst metal film (FIG. 1(c)) not masked by the carbon dot, removing the carbon dot from the catalyst metal film to expose the catalyst metal film (FIG. 1(d)), and growing a carbon nanotube probe tip on the catalyst film (16 in FIG. 1(e)). The carbon probe tips can be straight, angled, or sharply bent and have various technical applications.

    摘要翻译: 一种机械稳定和取向的扫描探针尖端,其包括具有逐渐减小的直径的基底的碳纳米管,在探针尖端具有尖锐的尖端。 通过在基板(图1(a)中的10和12)上沉积催化剂金属膜,在催化剂金属上沉积碳点(图1(b)中的14))来产生尖端或尖端阵列 蚀刻不被碳点掩蔽的催化剂金属膜(图1(c)),从催化剂金属膜除去碳点以暴露催化剂金属膜(图1(d)),并生长 催化剂膜上的碳纳米管探针尖端(图1(e)中的16))。 碳探针尖端可以是直的,有角度的或急剧弯曲的,并具有各种技术应用。