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1. 发明申请

US20130328557A1 NUCLEAR MAGNETIC RESONANCE PROBE SYSTEM 有权
标题翻译：核磁共振探测系统
公开(公告)号：US20130328557A1
公开(公告)日：2013-12-12
申请号：US13907293
申请日：2013-05-31
申请人： MICHAEL S. LARSEN , HENRY C. ABBINK , THAD G. WALKER , MICHAEL D. BULATOWICZ
发明人： MICHAEL S. LARSEN , HENRY C. ABBINK , THAD G. WALKER , MICHAEL D. BULATOWICZ
IPC分类号： G01R33/26
CPC分类号： G01R33/26 , G01C19/62 , G01R33/323
摘要： One embodiment includes a nuclear magnetic resonance (NMR) sensor system. The system includes a pump laser configured to generate an optical pump beam at a first wavelength and a probe laser configured to generate an optical probe beam at a second wavelength that is different from the first wavelength. The system also includes beam optics configured to direct the pump laser and the probe laser along orthogonal axes through a sensor cell comprising an alkali metal vapor. The system further includes detection optics that include a photodetector assembly configured to measure at least one characteristic associated with the optical probe beam leaving the sensor cell for measurement of a polarization vector of the alkali metal vapor. The detection optics can include at least one filter configured to filter light having the first wavelength and to pass light having the second wavelength to the photodetector assembly.
摘要翻译：一个实施例包括核磁共振（NMR）传感器系统。该系统包括配置成产生第一波长的光泵浦光束的泵浦激光器和被配置为产生不同于第一波长的第二波长的光学探针光束的探测激光器。该系统还包括光束光学元件，其构造成通过包括碱金属蒸气的传感器单元沿着正交轴引导泵浦激光器和探针激光器。该系统还包括检测光学器件，其包括光电检测器组件，该光电检测器组件被配置为测量与光学探针光束相关联的至少一个特性，离开该传感器单元以测量碱金属蒸气的极化矢量。检测光学器件可以包括至少一个被配置为过滤具有第一波长的光并将具有第二波长的光通过光电检测器组件的滤光器。

2. 发明申请

US20180372813A1 PULSED-BEAM ATOMIC MAGNETOMETER SYSTEM 审中-公开
公开(公告)号：US20180372813A1
公开(公告)日：2018-12-27
申请号：US16053535
申请日：2018-08-02
申请人： MICHAEL D. BULATOWICZ , THAD G. WALKER , MICHAEL S. LARSEN
发明人： MICHAEL D. BULATOWICZ , THAD G. WALKER , MICHAEL S. LARSEN
IPC分类号： G01R33/26 , G01R33/032 , G01R33/00
CPC分类号： G01R33/26 , G01R33/0041 , G01R33/0322
摘要： One example includes a magnetometer system that includes a sensor cell comprising alkali metal vapor and at least one measurement zone corresponding to a three-dimensional spatial region within the sensor cell. The system also includes a laser system configured to provide an optical pump beam through the sensor cell in a pulsed manner to facilitate precession of the alkali metal vapor in response to an external magnetic field and to provide an optical probe beam through the sensor cell in a pulsed manner based on a precession frequency of the alkali metal vapor. The system also includes a detection system configured to detect the precession of the alkali metal vapor in response to a detection beam corresponding to the optical probe beam exiting the sensor cell and to calculate an amplitude and direction of the external magnetic field based on the detected precession of the alkali metal vapor.

3. 发明申请

US20180348313A1 PULSED-BEAM ATOMIC MAGNETOMETER SYSTEM 审中-公开
公开(公告)号：US20180348313A1
公开(公告)日：2018-12-06
申请号：US15990974
申请日：2018-05-29
申请人： MICHAEL D. BULATOWICZ , THAD G. WALKER , MICHAEL S. LARSEN
发明人： MICHAEL D. BULATOWICZ , THAD G. WALKER , MICHAEL S. LARSEN
IPC分类号： G01R33/26
摘要： One example includes a magnetometer system. The system includes a sensor cell comprising alkali metal vapor and a laser system configured to provide an optical pump beam through the sensor cell in a pulsed manner to facilitate precession of the alkali metal vapor in response to an external magnetic field and to provide an optical probe beam through the sensor cell in a pulsed manner based on a precession frequency of the alkali metal vapor. The system also includes a detection system configured to detect the precession of the alkali metal vapor in response to a detection beam corresponding to the optical probe beam exiting the sensor cell and to calculate an amplitude and direction of the external magnetic field based on the detected precession of the alkali metal vapor.

4. 发明申请

US20140184216A1 SYSTEMS AND METHOD TO SUBSTANTIALLY MITIGATE AC STARK SHIFT EFFECTS IN A SENSOR SYSTEM 有权
标题翻译：在传感器系统中实施减轻AC STARK SHIFT效应的系统和方法
公开(公告)号：US20140184216A1
公开(公告)日：2014-07-03
申请号：US13727926
申请日：2012-12-27
申请人： THAD G. WALKER , MICHAEL D. BULATOWICZ , MICHAEL S. LARSEN , ROBERT C. GRIFFITH , PHILIP R. CLARK
发明人： THAD G. WALKER , MICHAEL D. BULATOWICZ , MICHAEL S. LARSEN , ROBERT C. GRIFFITH , PHILIP R. CLARK
IPC分类号： G01R33/26
CPC分类号： G01R33/26 , G01C19/62
摘要： One embodiment includes a sensor system. The system includes a cell system comprising a pump laser configured to generate a pump beam to polarize alkali metal particles enclosed within a sensor cell. The system also includes a detection system comprising a probe laser configured to generate a probe beam. The detection system can also be configured to calculate at least one measurable parameter based on characteristics of the probe beam passing through the sensor cell resulting from precession of the polarized alkali metal particles in response to an applied magnetic field. The system further includes an AC Stark shift control system configured to frequency-modulate the pump beam and to control a center frequency of a frequency-modulated pump beam based on the characteristics of the probe beam passing through the sensor cell to substantially stabilize and mitigate the effects of AC Stark shift on the at least one measurable parameter.
摘要翻译：一个实施例包括传感器系统。该系统包括一个电池系统，该电池系统包括被配置成产生泵浦光束以使包围在传感器电池内的碱金属颗粒极化的泵浦激光器。该系统还包括检测系统，其包括被配置为产生探测光束的探测激光器。检测系统还可以被配置为基于由施加的磁场响应于偏振的碱金属颗粒的进动而导致通过传感器单元的探针束的特性来计算至少一个可测量的参数。该系统还包括AC Stark变速控制系统，其配置成对泵浦波束进行频率调制，并且基于通过传感器单元的探测光束的特性来控制调频泵浦光束的中心频率，以基本上稳定和减轻 AC Stark移位对至少一个可测量参数的影响。

5. 发明申请

US20220018913A1 ATOMIC MAGNETOMETER SYSTEM 有权
公开(公告)号：US20220018913A1
公开(公告)日：2022-01-20
申请号：US16928609
申请日：2020-07-14
申请人： THAD G. WALKER , MICHAEL D. BULATOWICZ
发明人： THAD G. WALKER , MICHAEL D. BULATOWICZ
IPC分类号： G01R33/26
摘要： One example includes a magnetometer that includes a sensor cell comprising alkali metal vapor and a magnetic field generator system that generates predetermined AC magnetic fields through the sensor cell. The magnetometer also includes a laser system to provide optical pump and probe beams through the sensor cell in a pulsed manner to facilitate precession of the alkali metal vapor and to provide a detection beam corresponding to the optical probe beam exiting the sensor cell. The detection beam exhibits an optical property corresponding to a modified precession of the alkali metal vapor based on the predetermined AC magnetic fields and an external magnetic field. The magnetometer also includes a detection system to monitor the detection beam to detect the modified precession of the alkali metal vapor to calculate scalar and vector components of the external magnetic field based on the plurality of predetermined AC magnetic fields.

6. 发明申请

US20180101139A1 ATOMIC CLOCK SYSTEM 审中-公开
公开(公告)号：US20180101139A1
公开(公告)日：2018-04-12
申请号：US15722595
申请日：2017-10-02
申请人： MICHAEL S. LARSEN , THAD G. WALKER
发明人： MICHAEL S. LARSEN , THAD G. WALKER
IPC分类号： G04F5/14 , H05H3/02
CPC分类号： G04F5/145 , H05H3/02
摘要： An atomic clock system includes a magneto-optical trap (MOT) system that traps alkali metal atoms in a cell during a trapping stage of each of sequential coherent population trapping (CPT) cycles. The system also includes an interrogation system that generates an optical difference beam comprising a first optical beam having a first frequency and a second optical beam having a second frequency different from the first frequency. The interrogation system includes a direction controller that periodically alternates a direction of the optical difference beam through the cell during a CPT interrogation stage of each of the sequential clock measurement cycles to drive CPT interrogation of the trapped alkali metal atoms. The system also includes an oscillator system that adjusts a frequency of a local oscillator based on an optical response of the CPT interrogated alkali metal atoms during a state readout stage in each of the sequential clock measurement cycles.

7. 发明申请

US20200117146A1 ATOMIC CLOCK SYSTEM 审中-公开
公开(公告)号：US20200117146A1
公开(公告)日：2020-04-16
申请号：US16712614
申请日：2019-12-12
申请人： MICHAEL S. LARSEN , THAD G. WALKER
发明人： MICHAEL S. LARSEN , THAD G. WALKER
IPC分类号： G04F5/14 , H05H3/02
摘要： An atomic clock system includes a magneto-optical trap (MOT) system that traps alkali metal atoms in a cell during a trapping stage of each of sequential coherent population trapping (CPT) cycles. The system also includes an interrogation system that generates an optical difference beam comprising a first optical beam having a first frequency and a second optical beam having a second frequency different from the first frequency. The interrogation system includes a direction controller that periodically alternates a direction of the optical difference beam through the cell during a CPT interrogation stage of each of the sequential clock measurement cycles to drive CPT interrogation of the trapped alkali metal atoms. The system also includes an oscillator system that adjusts a frequency of a local oscillator based on an optical response of the CPT interrogated alkali metal atoms during a state readout stage in each of the sequential clock measurement cycles.

8. 发明申请

US20220196719A1 ELECTROMETER SENSOR CONTROL SYSTEM 有权
公开(公告)号：US20220196719A1
公开(公告)日：2022-06-23
申请号：US17552873
申请日：2021-12-16
申请人： THAD G. WALKER , ERIC A. IMHOF , STEVEN RYAN JEFFERTS
发明人： THAD G. WALKER , ERIC A. IMHOF , STEVEN RYAN JEFFERTS
IPC分类号： G01R29/12
摘要： One embodiment includes an electrometer system. The system includes a sensor cell comprising alkali metal atoms within, and a probe laser configured to generate a probe beam, the probe beam being provided through the sensor cell. The system also includes a coupling laser configured to generate a coupling beam. The coupling beam can be provided through the sensor cell to combine with the probe beam provided through the sensor cell to provide a Rydberg energy state of the alkali metal atoms, the probe beam exiting the sensor cell as a detection beam. The system further includes a sensor control system configured to monitor the detection beam to detect an external signal based on monitoring a phase of the detection beam.

9. 发明申请

US20220196718A1 ELECTROMETER WITH RYDBERG FREQUENCY TUNING 有权
公开(公告)号：US20220196718A1
公开(公告)日：2022-06-23
申请号：US17552854
申请日：2021-12-16
申请人： THAD G. WALKER , ERIC A. IMHOF , STEVEN RYAN JEFFERTS
发明人： THAD G. WALKER , ERIC A. IMHOF , STEVEN RYAN JEFFERTS
IPC分类号： G01R29/12
摘要： One embodiment includes an electrometer system. The system includes a sensor cell comprising alkali metal atoms within, and an optical beam system configured to provide at least one optical beam through the sensor cell to provide a first Rydberg energy state of the alkali metal atoms, the at least one optical beam exiting the sensor cell as a detection beam. The system also includes a tuning signal generator configured to generate a tuning signal having a predetermined tuning frequency to adjust an energy difference between the first Rydberg energy state and a second Rydberg energy state of the alkali metal atoms. The system further includes a detection system configured to monitor the detection beam to detect an external signal having a frequency that is approximately equal to the energy difference between the first Rydberg energy state and the second Rydberg energy state based on monitoring the detection beam.

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