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公开(公告)号：US11474175B2
公开(公告)日：2022-10-18
申请号：US16741302
申请日：2020-01-13
摘要： A heater system includes a current source configured to generate an input current and to receive a return current. The system also includes a heater configured to generate heat in response to the input current. The system further includes a plurality of current lead wires interconnecting the current source and the heater and being configured to provide the input current to the heater and to conduct the return current from the heater. Each of the plurality of current lead wires is arranged on a separate substrate layer such that each of the plurality of current lead wires are each spaced apart from each other. At least one of the input current and the return current is divided to be conducted on two or more of the plurality of current lead wires.
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公开(公告)号：US20220196444A1
公开(公告)日：2022-06-23
申请号：US17552909
申请日：2021-12-16
摘要： One embodiment includes a vapor cell for an atomic physics-based sensor system. The vapor cell includes a cell wall formed from an approximately transparent material. The cell wall can enclose an alkali metal vapor and can include an inner surface and an outer surface. The vapor cell can also include at least one structural feature provided on at least one of the inner surface and the outer surface of the cell wall and extending along a portion of the respective at least one of the inner surface and the outer surface.
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公开(公告)号：US10782368B2
公开(公告)日：2020-09-22
申请号：US15990974
申请日：2018-05-29
IPC分类号： G01R33/26 , G01R33/032
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.
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公开(公告)号：US20190101611A1
公开(公告)日：2019-04-04
申请号：US15722678
申请日：2017-10-02
摘要： One embodiment of the invention includes a magnetometer system. The system includes a sensor cell comprising alkali metal particles and at least one nuclear spin isotope. The system also includes a probe laser to provide a probe beam through the sensor cell to generate a detection beam, and a magnetic field system to generate magnetic fields through the sensor cell. The system also includes a detection system to implement detection of an external magnetic field based on characteristics of the detection beam in response to precession of the at least one nuclear spin isotope based on the magnetic fields. The system further includes a calibration controller configured to calibrate the magnetometer system based on implementing predetermined changes to the magnetic fields and monitoring the detection beam in a feedback manner.
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公开(公告)号：US09992581B2
公开(公告)日：2018-06-05
申请号：US15081043
申请日：2016-03-25
CPC分类号： H04R23/008 , H04R23/006 , H04R2410/00
摘要： One embodiment includes an optical microphone system. The system includes a laser configured to emit an optical beam at a linear polarization and an optical cavity system comprising a membranous mirror that is configured to reflect the optical beam and to vibrate in response to an acoustic input signal. The optical cavity system includes at least one photodetector configured to receive at least a portion of the optical beam to generate a microphone signal that is indicative of the vibration of the membranous mirror resulting from the acoustic input signal based on the reflection of the optical beam. The system further includes an acoustic processor configured to process the microphone signal to calculate a frequency of the acoustic input signal.
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公开(公告)号：US20170276741A1
公开(公告)日：2017-09-28
申请号：US15080876
申请日：2016-03-25
IPC分类号： G01R33/26 , G01R33/032
CPC分类号： G01R33/26 , G01C19/62 , G01N24/006 , G01R33/0041 , G01R33/0322
摘要： One example includes a sensor system. A cell system includes a pump laser which generates a pump beam to polarize alkali metal vapor enclosed within a sensor cell. A detection system includes a probe laser to generate a probe beam. The detection system can 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 vapor in response to an applied magnetic field. A pump beam control system pulse-width modulates a frequency of the pump beam to provide a pulse-width modulated (PWM) pump beam, and controls a duty-cycle of the PWM pump beam based on the characteristics of the probe beam passing through the sensor cell in a feedback manner to control polarization uniformity of the alkali metal vapor and to mitigate the effects of AC Stark shift on the at least one measurable parameter.
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7.发明申请公开(公告)号：US20170205476A1
公开(公告)日：2017-07-20
申请号：US15474433
申请日：2017-03-30
IPC分类号： G01R33/26 , G01R33/60 , G01R33/44 , G01R33/032
CPC分类号： G01R33/26 , G01R33/032 , G01R33/24 , G01R33/443 , G01R33/60
摘要： One embodiment of the invention includes a magnetometer system. The system includes a sensor cell comprising alkali metal particles and a probe laser configured to provide a probe beam through the sensor cell. The system also includes a detection system configured to implement nuclear magnetic resonance (NMR) detection of a vector magnitude of an external magnetic field in a first of three orthogonal axes based on characteristics of the probe beam passing through the sensor cell and to implement electron paramagnetic resonance (EPR) detection of a vector magnitude of the external magnetic field in a second and a third of the three orthogonal axes based on the characteristics of the probe beam passing through the sensor cell. The system further includes a controller configured to calculate a scalar magnitude of the external magnetic field based on the magnitude of the external magnetic field in each of the three orthogonal axes.
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公开(公告)号：US09645205B2
公开(公告)日：2017-05-09
申请号：US13711199
申请日：2012-12-11
CPC分类号： G01R33/26 , G01R33/032 , G01R33/24 , G01R33/443 , G01R33/60
摘要： One embodiment of the invention includes a magnetometer system. The system includes a sensor cell comprising alkali metal particles and a probe laser configured to provide a probe beam through the sensor cell. The system also includes a detection system configured to implement nuclear magnetic resonance (NMR) detection of a vector magnitude of an external magnetic field in a first of three orthogonal axes based on characteristics of the probe beam passing through the sensor cell and to implement electron paramagnetic resonance (EPR) detection of a vector magnitude of the external magnetic field in a second and a third of the three orthogonal axes based on the characteristics of the probe beam passing through the sensor cell. The system further includes a controller configured to calculate a scalar magnitude of the external magnetic field based on the magnitude of the external magnetic field in each of the three orthogonal axes.
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公开(公告)号：US09618362B2
公开(公告)日：2017-04-11
申请号：US14295091
申请日：2014-06-03
CPC分类号： G01C25/00 , G01C19/62 , G01C25/005
摘要： One embodiment includes a nuclear magnetic resonance (NMR) gyroscope system. The system includes a vapor cell comprising an alkali metal and a plurality of gyromagnetic isotopes and a pump laser configured to generate an optical pump beam configured to spin-polarize the alkali metal. The system also includes a probe laser that generates an optical probe beam and a detection system configured to monitor the optical probe beam and to calculate a rotation of the NMR gyroscope system about a sensitive axis based on a modulation of the optical probe beam in response to precession of the plurality of gyromagnetic isotopes resulting from the spin-polarization of the alkali metal. The system further includes a calibration controller that modulates a characteristic of the optical pump beam to substantially mitigate bias errors associated with the gyromagnetic isotopes in the calculation of the rotation of the NMR gyroscope system about the sensitive axis.
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公开(公告)号：US09417260B2
公开(公告)日：2016-08-16
申请号：US14103595
申请日：2013-12-11
IPC分类号： G01P15/093 , G01P15/13
CPC分类号： G01P15/093 , G01P15/13
摘要： An example optical accelerometer system is provided. An optical beam is provided having a predefined center frequency and is frequency-modulated about the predefined center frequency. An optical cavity includes a first mirror at a first end and a second mirror at a second end of the optical cavity. The second mirror is movable along the axial length of the optical cavity in response to an external acceleration, and the optical cavity receives the optical beam and emits a resonated optical beam. An acceleration detection system measures an intensity of the resonated optical beam and calculates a magnitude of the external acceleration along the axial length of the optical cavity based on the intensity of the resonated optical beam resulting from motion of the second mirror. A stabilization system stabilizes the predefined center frequency of the optical beam independently of the external acceleration based on the modulation of the optical beam.
摘要翻译： 提供了一个示例性的光学加速度计系统。 提供具有预定中心频率并且关于预定中心频率进行频率调制的光束。 光腔包括在第一端处的第一反射镜和在光腔的第二端的第二反射镜。 响应于外部加速度，第二反射镜可沿着光腔的轴向长度移动，并且光腔接收光束并发射共振的光束。 加速度检测系统测量共振光束的强度，并且基于由第二反射镜的运动产生的共振光束的强度来计算沿着光腔的轴向长度的外部加速度的大小。 稳定系统基于光束的调制，独立于外部加速度稳定光束的预定中心频率。
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