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    • 4. 发明授权
    • Autocorrelation of ultrashort electromagnetic pulses
    • 超短电磁脉冲的自相关
    • US06195167B1
    • 2001-02-27
    • US09129726
    • 1998-08-05
    • Derryck Telford ReidWilliam Ernest Donald SleatWilson Sibbett
    • Derryck Telford ReidWilliam Ernest Donald SleatWilson Sibbett
    • G01B902
    • G01J11/00
    • There is provided an autocorrelator of ultrashort electromagnetic pulses, comprising an interferometer for receiving a parent electromagnetic pulse from an energy source and for deriving two daughter electromagnetic pulses from the parent pulse, an output means coupled to the interferometer to output the daughter pulses, and a photodiode in communication with the output means to detect the daughter pulses and to alter the frequency thereof so as to produce an electrical output signal that has a quadratic dependence on the power associated with the parent electromagnetic pulse. The temporal duration of the pulses ranges from TO picoseconds to 5 femtoseconds. A GaAsP photodiode is used with a broad band response of 700-1300 nm. The interferometer is either a Michelson interferometer or a Wollaston prism interferometer and a microscope objective is provided between the output means and the photodiode so that the pulses from the output means are focused onto a defined area of the photodiode.
    • 提供了一种超短电磁脉冲的自相关器,包括用于从能量源接收母电磁脉冲并从母脉冲导出两个子电磁脉冲的干涉仪,耦合到干涉仪以输出子脉冲的输出装置,以及 与输出装置通信的光电二极管,用于检测子脉冲并改变其频率,从而产生与母电磁脉冲相关的功率具有二次依赖性的电输出信号。 脉冲的持续时间范围从TO皮秒到5飞秒。 GaAsP光电二极管使用700-1300 nm的宽带响应。 干涉仪是迈克尔逊干涉仪或沃拉斯顿棱镜干涉仪,并且在输出装置和光电二极管之间提供显微镜物镜,使得来自输出装置的脉冲聚焦到光电二极管的限定区域上。
    • 7. 发明授权
    • Reduced complexity fourier transform spectrometer
    • 降低复杂度的傅立叶变换光谱仪
    • US5774215A
    • 1998-06-30
    • US709296
    • 1996-09-09
    • Miles John PadgettWilson SibbettJohannes CourtialBrett Alexander Patterson
    • Miles John PadgettWilson SibbettJohannes CourtialBrett Alexander Patterson
    • G01J3/453G01B9/02
    • G01J3/4537
    • A Fourier transform spectrometer for use, among others, for sensing gases or liquids includes two polarizers, a birefringent optical component interposed between the two polarizers and a detector. Light from an extended source is substantially polarized by a first of the two polarizers, split into divergent beams by the birefringent optical component, and again caused to converge by the birefringent optical component so that, after passing through a second of the two polarizers, the light forms an interferogram in a plane behind the birefringent optical component where the detector is situated. The Fourier transform spectrometer is thereby provided with a way of forming an interferogram of the light from the extended source without a lens or a second birefringent optical component. This improves the field of view of the spectrometer and is likely to reduce its cost.
    • 用于检测气体或液体的傅立叶变换光谱仪包括两个偏振器,两个偏振器之间的双折射光学部件和检测器。 来自扩展源的光被两个偏振器中的第一个基本上极化,通过双折射光学部件分裂成发散光束,并且再次由双折射光学部件会聚,使得在穿过两个偏振器中的第二个偏振器之后, 光在检测器所在的双折射光学部件的后面的平面中形成干涉图。 因此,傅立叶变换光谱仪具有形成来自不具有透镜或第二双折射光学部件的来自扩展源的光的干涉图的方式。 这改善了光谱仪的视野,并且可能降低其成本。
    • 9. 发明授权
    • Apparatus for measuring light beam characteristics
    • 用于测量光束特性的装置
    • US4693599A
    • 1987-09-15
    • US837644
    • 1986-03-05
    • Walter MargulisWilson SibbettWilliam E. Sleat
    • Walter MargulisWilson SibbettWilliam E. Sleat
    • G01T1/24G01J1/00H01L31/02H01L31/08G01J1/42H01L27/14
    • H01L31/08
    • The spatial or temporal characteristic of a beam of light or other electromagnetic radiation or a beam of sub-atomic particles is measured by an array of detectors. The array comprises the layer 1 of photosensitive material on which there are positioned pairs of electrodes 1a, 2a and 1b, 2b etc., with gaps between the electrodes of a pair. The gaps are spaced apart linearly and the material is chosen so that incident light affects current flow between the electrodes defining a gap. Changes in current flow between the individual pairs of electrodes are measured. For measurement of spatial profile layer 1 has a resistivity which varies linearly with the amplitude of incident light. For measurement of temporal profile the beam is split with the split beams being directed on to the array with different angles of incidence and the material is chosen to have a two-photon conductivity.
    • 通过一组检测器测量光束或其他电磁辐射或亚原子粒子束的空间或时间特性。 该阵列包括感光材料层1,其上设置有一对电极1a,2a和1b,2b等之间的间隔。 这些间隙线性地间隔开,并且选择材料使得入射光影响限定间隙的电极之间的电流。 测量各对电极之间电流的变化。 对于空间分布层1的测量具有随入射光的振幅线性变化的电阻率。 为了测量时间曲线,将光束分裂,分束束以不同的入射角被引导到阵列,并且选择材料具有双光子导电性。