公开(公告)号：US20070146722A1

公开(公告)日：2007-06-28

申请号：US11316855

申请日：2005-12-23

申请人： William Trutna ,  Geraint Owen ,  Alan Ray ,  James Prince ,  Eric Johnstone ,  Miao Zhu ,  Leonard Cutler

发明人： William Trutna ,  Geraint Owen ,  Alan Ray ,  James Prince ,  Eric Johnstone ,  Miao Zhu ,  Leonard Cutler

IPC分类号： G01B9/02

CPC分类号： G01D5/266 ,  G01D5/38

摘要： An apparatus and method for measuring displacement includes a light beam directed to an interferometer core that splits the light beam into first and second component beams. The first component beam is directed to a diffraction grating at approximately a Littrow angle. A diffraction is received by the interferometer core and is combined with the second component beam. The combination of the first and second component beams is measured to determine displacement of the diffraction grating.

摘要翻译： 用于测量位移的装置和方法包括指向干涉仪芯的光束，其将光束分成第一和第二分量光束。 第一分量光束以大约Littrow角度被引导到衍射光栅。 衍射由干涉仪芯接收并与第二分量光束组合。 测量第一和第二分量光束的组合以确定衍射光栅的位移。

公开(公告)号：US20050207456A1

公开(公告)日：2005-09-22

申请号：US10805005

申请日：2004-03-18

申请人： John Berberian ,  Leonard Cutler ,  Miao Zhu

发明人： John Berberian ,  Leonard Cutler ,  Miao Zhu

IPC分类号： G01N21/39 ,  G04F5/14 ,  H03K17/945 ,  H03L7/26 ,  H01S3/113

CPC分类号： H03L7/26 ,  G04F5/14 ,  G04F5/145

摘要： An apparatus and method for measuring CPT is disclosed. The apparatus includes a quantum absorber that is irradiated by radiation from an electromagnetic radiation source. The quantum absorber includes a material that exhibits CPT. The electromagnetic radiation source generates electromagnetic radiation having first and second CPT-generating frequency components. The first CPT-generating frequency component has a frequency νL−ν, and a first CPT component amplitude. The second CPT generating frequency component has a frequency νL+ν and a second CPT component amplitude. The apparatus also includes a detector for generating a detector signal related to the power of electromagnetic radiation that leaves the quantum absorber. The detector signal exhibits an asymmetry as a function of frequency ν in a frequency range about a frequency ν0. The apparatus includes an asymmetry servo loop that alters one of νL, the first CPT component amplitude, and the second CPT component amplitude to reduce the asymmetry.

摘要翻译： 公开了一种用于测量CPT的装置和方法。 该装置包括由来自电磁辐射源的辐射照射的量子吸收器。 量子吸收器包括展示CPT的材料。 电磁辐射源产生具有第一和第二CPT产生频率分量的电磁辐射。 第一CPT产生频率分量具有频率nuL-nu和第一CPT分量幅度。 第二CPT产生频率分量具有频率nuLL + nu和第二CPT分量振幅。 该装置还包括用于产生与离开量子吸收器的电磁辐射功率相关的检测器信号的检测器。 检测器信号表现出在频率nu <0> 0的频率范围内作为频率nu的函数的不对称性。 该装置包括不对称伺服环路，其改变第一CPT分量振幅和第二CPT分量振幅中的一个，以减小不对称性。

公开(公告)号：US20060083277A1

公开(公告)日：2006-04-20

申请号：US10968264

申请日：2004-10-18

申请人： Miao Zhu ,  Leonard Cutler ,  John Berberian

发明人： Miao Zhu ,  Leonard Cutler ,  John Berberian

IPC分类号： H01S3/14

CPC分类号： H01S3/1392 ,  H01S3/1394 ,  H01S3/1398

摘要： An apparatus for generating a stabilized frequency signal is disclosed. The apparatus includes a quantum absorber having first, second, and third energy states. The quantum absorber is irradiated by a first radiation source that generates electromagnetic radiation having a frequency, νL, that induces transitions between the first and third energy states. The quantum absorber is also irradiated by a second radiation source that generates electromagnetic radiation having a frequency, νM, that induces transitions between the first and second energy states. A detector that generates a detector signal indicative of the level of radiation leaving the quantum absorber in a frequency range including νL is used by a number of servo loops. One of the servo loops determines the value of νL that minimizes or maximizes the detector signal and a second servo loop determines an offset signal that reduces the dependence of νM on the intensity of the first radiation source.

摘要翻译： 公开了一种用于产生稳定频率信号的装置。 该装置包括具有第一，第二和第三能量状态的量子吸收器。 量子吸收器被产生电磁辐射的第一辐射源照射，该辐射源具有在第一和第三能量状态之间产生转变的频率，nu L。 量子吸收器也被产生电磁辐射的第二辐射源照射，该辐射源具有在第一和第二能量状态之间产生转变的频率n N M M M。 通过多个伺服回路使用产生指示离开量子吸收器的辐射水平的检测器信号的检测器信号在包括nuL L的频率范围内。 伺服环路中的一个确定使检测器信号最小化或最大化的nu L的值，并且第二伺服环路确定减小nu < 第一辐射源的强度。