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    • 3. 发明申请
    • BATCH-FABRICATED, RF-INTERROGATED, END TRANSITION, CHIP-SCALE ATOMIC CLOCK
    • 批量制造,射频内插,终端转换,芯片尺寸原子钟
    • US20090066430A1
    • 2009-03-12
    • US12273852
    • 2008-11-19
    • Alan Michael BraunJoseph Hy AbelesWinston Kong ChanMartin KwakernaakTimothy James Davis
    • Alan Michael BraunJoseph Hy AbelesWinston Kong ChanMartin KwakernaakTimothy James Davis
    • H03B17/00H03L7/26
    • G04F5/14H01S5/141
    • A chip scale atomic clock is disclosed that provides a low power atomic time/frequency reference that employs direct RF-interrogation on an end-state transition. The atomic time/frequency reference includes an alkali vapor cell containing alkali atoms, preferably cesium atoms, flex circuits for physically supporting, heating, and thermally isolating the alkali vapor cell, a laser source for pumping alkali atoms within the alkali vapor cell into an end resonance state by applying an optical signal along a first axis, a photodetector for detecting a second optical signal emanating from the alkali vapor cell along the first axis, a pair of RF excitation coils for applying an RF-interrogation signal to the alkali atoms along a second axis perpendicular to the first axis, a pair of bias coils for applying a uniform DC magnetic field along the first axis, and a pair of Zeeman coils for applying a Zeeman interrogation signal to the alkali atoms and oriented and configured to apply a time-varying magnetic field along the second axis through the alkali vapor cell. Another flex circuit is used for physically supporting the laser source, for heating the laser source, and for providing thermal isolation of the laser source. The laser source can be a vertical cavity surface emitting laser (VSCEL). The bias coils can be Helmholtz coils.
    • 公开了一种芯片级原子钟,其提供在终端状态转换时采用直接RF询问的低功率原子时间/频率参考。 原子时间/频率参考值包括含有碱金属,优选铯原子的碱性蒸汽池,用于物理支撑,加热和热分离碱性蒸汽池的柔性电路,用于将碱性蒸气室内的碱性原子泵送到末端的激光源 通过沿着第一轴施加光信号的共振状态,用于检测沿着第一轴从碱蒸气单元发出的第二光信号的光检测器,一对RF激励线圈,用于沿着第一轴向碱金属原子施加RF询问信号 与第一轴垂直的第二轴,用于沿着第一轴施加均匀的DC磁场的一对偏置线圈,以及一对塞曼线圈,用于向碱原子施加塞曼询问信号,并且被定向和配置为施加时间 - 沿着第二轴的变化的磁场通过碱性蒸汽池。 另一个柔性电路用于物理支撑激光源,用于加热激光源,并提供激光源的热隔离。 激光源可以是垂直腔表面发射激光器(VSCEL)。 偏置线圈可以是亥姆霍兹线圈。
    • 4. 发明授权
    • Batch-fabricated, RF-interrogated, end transition, chip-scale atomic clock
    • 批量制造,RF询问,终端转换,芯片级原子钟
    • US07468637B2
    • 2008-12-23
    • US11736657
    • 2007-04-18
    • Alan Michael BraunJoseph Hy AbelesWinston Kong ChanMartin KwakernaakTimothy James Davis
    • Alan Michael BraunJoseph Hy AbelesWinston Kong ChanMartin KwakernaakTimothy James Davis
    • H01S1/06H03L7/26
    • G04F5/14H01S5/141
    • A chip scale atomic clock is disclosed that provides a low power atomic time/frequency reference that employs direct RF-interrogation on an end-state transition. The atomic time/frequency reference includes an alkali vapor cell containing alkali atoms, preferably cesium atoms, flex circuits for physically supporting, heating, and thermally isolating the alkali vapor cell, a laser source for pumping alkali atoms within the alkali vapor cell into an end resonance state by applying an optical signal along a first axis, a photodetector for detecting a second optical signal emanating from the alkali vapor cell along the first axis, a pair of RF excitation coils for applying an RF-interrogation signal to the alkali atoms along a second axis perpendicular to the first axis, a pair of bias coils for applying a uniform DC magnetic field along the first axis, and a pair of Zeeman coils for applying a Zeeman interrogation signal to the alkali atoms and oriented and configured to apply a time-varying magnetic field along the second axis through the alkali vapor cell. Another flex circuit is used for physically supporting the laser source, for heating the laser source, and for providing thermal isolation of the laser source. The laser source can be a vertical cavity surface emitting laser (VSCEL). The bias coils can be Helmholtz coils.
    • 公开了一种芯片级原子钟,其提供在终端状态转换时采用直接RF询问的低功率原子时间/频率参考。 原子时间/频率参考值包括含有碱金属,优选铯原子的碱性蒸汽池,用于物理支撑,加热和热分离碱性蒸汽池的柔性电路,用于将碱性蒸气室内的碱性原子泵送到末端的激光源 通过沿着第一轴施加光信号的共振状态,用于检测沿着第一轴从碱蒸气单元发出的第二光信号的光检测器,一对RF激励线圈,用于沿着第一轴向碱金属原子施加RF询问信号 与第一轴垂直的第二轴,用于沿着第一轴施加均匀的DC磁场的一对偏置线圈,以及一对塞曼线圈,用于向碱原子施加塞曼询问信号,并且被定向和配置为施加时间 - 沿着第二轴的变化的磁场通过碱性蒸汽池。 另一个柔性电路用于物理支撑激光源,用于加热激光源,并提供激光源的热隔离。 激光源可以是垂直腔表面发射激光器(VSCEL)。 偏置线圈可以是亥姆霍兹线圈。
    • 8. 发明授权
    • Batch-fabricated, RF-interrogated, end transition, chip-scale atomic clock
    • 批量制造,RF询问,终端转换,芯片级原子钟
    • US07852163B2
    • 2010-12-14
    • US12273852
    • 2008-11-19
    • Alan Michael BraunJoseph Hy AbelesWinston Kong ChanMartin KwakernaakTimothy James Davis
    • Alan Michael BraunJoseph Hy AbelesWinston Kong ChanMartin KwakernaakTimothy James Davis
    • H01S1/06H03L7/26
    • G04F5/14H01S5/141
    • A chip scale atomic clock is disclosed that provides a low power atomic time/frequency reference that employs direct RF-interrogation on an end-state transition. The atomic time/frequency reference includes an alkali vapor cell containing alkali atoms, preferably cesium atoms, flex circuits for physically supporting, heating, and thermally isolating the alkali vapor cell, a laser source for pumping alkali atoms within the alkali vapor cell into an end resonance state by applying an optical signal along a first axis, a photodetector for detecting a second optical signal emanating from the alkali vapor cell along the first axis, a pair of RF excitation coils for applying an RF-interrogation signal to the alkali atoms along a second axis perpendicular to the first axis, a pair of bias coils for applying a uniform DC magnetic field along the first axis, and a pair of Zeeman coils for applying a Zeeman interrogation signal to the alkali atoms and oriented and configured to apply a time-varying magnetic field along the second axis through the alkali vapor cell. Another flex circuit is used for physically supporting the laser source, for heating the laser source, and for providing thermal isolation of the laser source. The laser source can be a vertical cavity surface emitting laser (VSCEL). The bias coils can be Helmholtz coils.
    • 公开了一种芯片级原子钟,其提供在终端状态转换时采用直接RF询问的低功率原子时间/频率参考。 原子时间/频率参考值包括含有碱金属,优选铯原子的碱性蒸汽池,用于物理支撑,加热和热分离碱性蒸汽池的柔性电路,用于将碱性蒸气室内的碱性原子泵送到末端的激光源 通过沿着第一轴施加光信号的共振状态,用于检测沿着第一轴从碱蒸气单元发出的第二光信号的光检测器,一对RF激励线圈,用于沿着第一轴向碱金属原子施加RF询问信号 与第一轴垂直的第二轴,用于沿着第一轴施加均匀的DC磁场的一对偏置线圈,以及一对塞曼线圈,用于向碱原子施加塞曼询问信号,并且被定向和配置为施加时间 - 沿着第二轴的变化的磁场通过碱性蒸汽池。 另一个柔性电路用于物理支撑激光源,用于加热激光源,并提供激光源的热隔离。 激光源可以是垂直腔表面发射激光器(VSCEL)。 偏置线圈可以是亥姆霍兹线圈。