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1.发明申请公开(公告)号：US20140354275A1
公开(公告)日：2014-12-04
申请号：US14294578
申请日：2014-06-03
申请人： Dong Sheng , Shuguang Li , Nezih Dural , Michael V. Romalis
发明人： Dong Sheng , Shuguang Li , Nezih Dural , Michael V. Romalis
IPC分类号： G01R33/26
CPC分类号： G01R33/26
摘要： A magnetometer for use with a sample including an atomic vapor is disclosed. The magnetometer includes a cell containing the sample such as a multipass cell including a first mirror element and a second mirror element configured so that an incoming light beam injected into the container will reflect multiple times between the first mirror element and the second mirror element. A polarized pump light source is configured to transmit pump light through the cell and pump the sample. A polarized probe light source configured to transmit probe light through the cell and probe the sample. A detector configured to detect a polarization angle or intensity of the probe light transmitted through the sample. A processor may be configured to calculate a precession frequency of the sample based on a first probe light pulse and a frequency correction based on a second probe light pulse.
摘要翻译： 公开了一种与包含原子蒸汽的样品一起使用的磁强计。 磁力计包括一个包含样品的单元，例如包括第一反射镜元件和第二反射镜元件的多通道单元，第二反射镜元件被构造成使得注入到容器中的入射光束将在第一反射镜元件和第二反射镜元件之间反射多次。 偏振泵浦光源被配置为将泵浦光透过电池并泵送样品。 偏振探测光源被配置为将探测光透过细胞并探测样品。 检测器，被配置为检测穿过样品的探测光的偏振角或强度。 处理器可以被配置为基于第一探测光脉冲和基于第二探测光脉冲的频率校正来计算样本的进动频率。
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2.发明授权Subfemtotesla radio-frequency atomic magnetometer for nuclear quadrupole resonance detection 有权Subfemtotesla射频原子磁强计用于核四极共振检测公开(公告)号：US07521928B2
公开(公告)日：2009-04-21
申请号：US11593739
申请日：2006-11-07
IPC分类号： G01V3/00
CPC分类号： G01R33/24 , G01R33/441
摘要： A radio-frequency tunable atomic magnetometer for detection of nuclear quadrupole resonance (NQR) from room temperature solids, including detection of nitrogen-containing explosives placed external to a sensor unit. A potassium radio-frequency magnetometer with sensitivity of 0.24 fT/Hz1/2 operating at 423 kHz is provided. The magnetometer detected a 14N NQR signal from room temperature ammonium nitrate (NH4NO3) in the zero-applied field limit. Results demonstrate first time detection of NQR with an atomic magnetometer, providing that a cryogen-free atomic magnetometer, with intrinsically frequency-independent sensitivity and easy tuning capabilities, can be an attractive new tool for detecting magnetic resonance signals in the kHz to MHz range. Low intensity magnetic fields are measured using an alkali metal vapor, by increasing magnetic polarization of the vapor to increase its sensitivity, then probing the magnetic polarization of the vapor to receive an output, and determining characteristics of the low intensity magnetic field from the output.
摘要翻译： 一种用于从室温固体中检测核四极共振（NQR）的射频可调谐原子磁强计，包括检测位于传感器单元外部的含氮炸药。 提供灵敏度为0.24 fT / Hz1 / 2的钾射频磁力计，工作在423 kHz。 磁力计在零施加磁场极限中检测到室温硝酸铵（NH4NO3）的14N NQR信号。 结果证明使用原子磁强计首次检测NQR，使得具有固有频率独立灵敏度和易于调谐能力的无冷冻原子磁强计可成为检测kHz至MHz范围内的磁共振信号的有吸引力的新工具。 使用碱金属蒸汽测量低强度磁场，通过增加蒸汽的磁极化度来提高其灵敏度，然后探测蒸气的磁极化以接收输出，并从输出确定低强度磁场的特性。
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3.发明授权Method and system for operating an atomic clock with alternating-polarization light 有权用交流偏振光操作原子钟的方法和系统公开(公告)号：US07102451B2
公开(公告)日：2006-09-05
申请号：US11052261
申请日：2005-02-07
申请人： William Happer , Yuan-Yu Jau , Nicholas N. Kuzma , Eli Miron , Amber B. Post , Michael V. Romalis
发明人： William Happer , Yuan-Yu Jau , Nicholas N. Kuzma , Eli Miron , Amber B. Post , Michael V. Romalis
摘要： The present invention provides a method and apparatus for increasing the intensity of coherent population trapping (CPT) resonances, used in atomic clocks and magnetometers, by pumping the atoms with light of alternating polarization. Pumping with such light, characterized by a photon spin vector that alternates in direction at a hyperfine frequency of the atoms at the location of the atoms, is referred to as push-pull pumping. In one embodiment of the system of the present invention, alkali-metal vapor is pumped with alternating circular-polarization D1 laser light that is intensity modulated at appropriate resonance frequencies, thereby exciting CPT resonances, which can be observed as increase in the mean transmittance of the alkali-metal vapor. These resonances are substantially enhanced due to an optically-induced concentration of atoms in the resonant energy sublevels.
摘要翻译： 本发明提供了一种用于通过用交替极化的光泵浦原子来增加在原子钟和磁力计中使用的相干群体捕获（CPT）共振的强度的方法和装置。 用这样的光泵浦，其特征在于在原子位置处的原子的超精细频率在方向上交替的光子自旋矢量被称为推挽泵浦。 在本发明的系统的一个实施例中，碱金属蒸汽用交替的圆偏振D 1激光泵浦，其以适当的共振频率进行强度调制，从而激发CPT谐振，这可以通过平均透射率的增加来观察 的碱金属蒸汽。 由于谐振能量子层中的原子的光学诱导浓度，这些共振显着增强。
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4.发明申请Subfemtotesla radio-frequency atomic magnetometer for nuclear quadrupole resonance detection 有权Subfemtotesla射频原子磁强计用于核四极共振检测公开(公告)号：US20080106261A1
公开(公告)日：2008-05-08
申请号：US11593739
申请日：2006-11-07
CPC分类号： G01R33/24 , G01R33/441
摘要： A radio-frequency tunable atomic magnetometer for detection of nuclear quadrupole resonance (NQR) from room temperature solids, including detection of nitrogen-containing explosives placed external to a sensor unit. A potassium radio-frequency magnetometer with sensitivity of 0.24 fT/Hz1/2 operating at 423 kHz is provided. The magnetometer detected a 14N NQR signal from room temperature ammonium nitrate (NH4NO3) in the zero-applied field limit. Results demonstrate first time detection of NQR with an atomic magnetometer, providing that a cryogen-free atomic magnetometer, with intrinsically frequency-independent sensitivity and easy tuning capabilities, can be an attractive new tool for detecting magnetic resonance signals in the kHz to MHz range. Low intensity magnetic fields are measured using an alkali metal vapor, by increasing magnetic polarization of the vapor to increase its sensitivity, then probing the magnetic polarization of the vapor to receive an output, and determining characteristics of the low intensity magnetic field from the output.
摘要翻译： 一种用于从室温固体中检测核四极共振（NQR）的射频可调谐原子磁强计，包括检测位于传感器单元外部的含氮炸药。 提供了在423kHz下工作的灵敏度为0.24fT / Hz <1/2>的钾射频磁力计。 在零施加磁场极限中，磁力计检测到来自室温硝酸铵（NH 3 SO 3 N 3）的“14”N NQR信号。 结果证明使用原子磁强计首次检测NQR，使得具有固有频率独立灵敏度和易于调谐能力的无冷冻原子磁强计可成为检测kHz至MHz范围内的磁共振信号的有吸引力的新工具。 使用碱金属蒸汽测量低强度磁场，通过增加蒸汽的磁极化度来提高其灵敏度，然后探测蒸气的磁极化以接收输出，并从输出确定低强度磁场的特性。
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