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    • 1. 发明授权
    • Method and apparatus for nonlinear frequency generation using a
strongly-driven local oscillator
    • 使用强驱动本地振荡器的非线性频率产生的方法和装置
    • US5771117A
    • 1998-06-23
    • US669028
    • 1996-06-17
    • Stephen E. HarrisGuang-Yu YinManeesh Jain
    • Stephen E. HarrisGuang-Yu YinManeesh Jain
    • G02F1/35G02F1/39
    • G02F1/3534G02F1/353G02F1/39
    • Efficient nonlinear processes in a nonlinear optical medium are achieved by combining the concept of electromagnetically induced transparency (EIT) and a strongly-driven atomic local oscillator. The present method uses a nonlinear optical medium having elementary entities, such as atoms or molecules, in which a ground state .vertline.1> and a second state .vertline.2> are selected such that the transition between the ground state .vertline.1> and the second state .vertline.2> is a dipole forbidden transition. An upper state .vertline.3> selected from among the energy states .vertline.i> above the ground state .vertline.1> such that a two-photon transition between the ground state .vertline.1> and the second state .vertline.2> via the upper state .vertline.3> is allowed. A strongly-driven coherent superposition state which gives rise to the strongly-driven local oscillator is produced by applying two pumping beams, P1 and P2, at frequencies corresponding to transitions between states .vertline.2> and .vertline.3> and between states .vertline.1> and .vertline.3>. The nonlinear optical medium prepared in this way is used for efficient sum-and-difference and parametric generation in .LAMBDA. and ladder systems.
    • 通过组合电磁感应透明度(EIT)和强驱动原子本地振荡器的概念,可以实现非线性光学介质中的高效非线性处理。 本方法使用具有诸如原子或分子的基本实体的非线性光学介质,其中选择基态| 1和第二状态| 2>使得基态与第二状态之间的转变 | 2>是偶极子禁止转换。 从基态1以上的能量状态i中选出的上状态| 3>使得通过上状态| 3>基态1>第2状态| 2>之间的双光子跃迁, 被允许。 产生强驱动的本地振荡器的强驱动相干叠加状态是通过在对应于状态| 2>和| 3>之间以及状态| 1>和...之间的跃迁的频率处施加两个泵浦光束P1和P2来产生的 | 3>。 以这种方式制备的非线性光学介质用于LAMBDA和梯形图系统中的有效的和差和参数生成。
    • 3. 发明授权
    • Method for producing electromagnetically induced transparency in atoms
with hyperfine structure
    • 在超细结构的原子中产生电磁感应透明度的方法
    • US6097532A
    • 2000-08-01
    • US183712
    • 1998-10-30
    • Stephen E. HarrisAndrew J. MerriamScott J. SharpeHui XiaGuang-Yu Yin
    • Stephen E. HarrisAndrew J. MerriamScott J. SharpeHui XiaGuang-Yu Yin
    • G02F1/35G02F1/39
    • G02F1/3534G02F1/3515G02F1/353
    • A method for producing electromagnetically induced transparency (EIT) in atoms with hyperfine structure. EIT is the phenomenon in which a material (e.g. lead vapor) becomes transparent to a first electromagnetic frequency (a probe beam) when exposed to a second electromagnetic frequency (a coupling beam). In the present invention, the atom has hyperfine split energy levels. In the method of the present invention, the coupling and probe beams are tuned to transitions between the centers of gravity (COGs) of the hyperfine split levels. This allows high transparencies to be achieved in high opacity materials. Also, the present method can produce EIT in isotopically mixed materials. This is because the COGs of hyperfine split levels (in nuclear spin.notident.0 atoms) are generally coincident with nonhyperfine split levels (in nuclear spin=0 atoms). The method of the present invention is directly applicable to nonlinear sum and difference frequency generation.
    • 在超细结构的原子中生产电磁感应透明度(EIT)的方法。 EIT是当暴露于第二电磁频率(耦合光束)时材料(例如铅蒸汽)变得对第一电磁频率(探针光束)透明的现象。 在本发明中,原子具有超精细分裂能级。 在本发明的方法中,耦合和探针光束被调谐到超精细分裂水平的重心(COG)之间的过渡。 这样可以在高不透明度材料中实现高透明度。 此外,本方法可以在同位素混合材料中产生EIT。 这是因为超精细分裂水平(在核旋转NOTEQUAL 0原子)中的COG通常与非高分子水平(在核自旋= 0个原子)中重合。 本发明的方法直接适用于非线性和差和频差产生。
    • 5. 发明授权
    • Vacuum ultraviolet and x-ray light source and method and short
wavelength laser pumped by said light source
    • 真空紫外线和X射线光源以及由所述光源泵浦的方法和短波长激光
    • US4218628A
    • 1980-08-19
    • US41778
    • 1979-05-23
    • Stephen E. Harris
    • Stephen E. Harris
    • H01S4/00H03F7/00
    • H01S4/00
    • A vacuum ultraviolet and x-ray light source based on spontaneous anti-Stokes scattering from atomic population stored in a metastable level is described. The source has a maximum brightness, attained as the media approaches two-photon opacity, equal to that of a blackbody at a Boltzmann temperature characteristic of the population of the metastable level. The source may have high resolution, picosecond time scale, and on a pulsed basis is brighter than other laboratory vacuum ultraviolet light sources. Short wavelength lasers pumped by said source are also described. The lasing atomic species can be separate from or combined in the same envelope with the light source atomic species. Use of the source for spectrographic applications is also described.
    • 描述了基于存储在亚稳态水平的原子群的自发抗斯托克斯散射的真空紫外线和X射线光源。 该源具有最大亮度,当介质接近双光子不透明度时,其等于在亚稳态水平的群体的玻尔兹曼温度特征下的黑体的亮度。 源可以具有高分辨率,皮秒时间尺度,并且在脉冲基础上比其他实验室真空紫外光源更亮。 还描述了由所述源泵浦的短波长激光器。 激光原子物种可以与光源原子物质分离或组合在相同的包络中。 还描述了对光谱应用的源的使用。