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公开(公告)号：US20110007307A1
公开(公告)日：2011-01-13
申请号：US12499799
申请日：2009-07-09
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
CPC分类号： G01J3/44 , G01J3/447 , G01J2003/1213 , G01N21/23 , G01N21/65 , G01N2021/216 , G01N2201/0612
摘要： A tunable optical filter includes a medium configured to perform polarization rotation on a portion of a linearly polarized signal beam having a frequency within a selected frequency band, wherein the medium is circularly birefringent within the frequency band, and wherein the polarization rotation is achieved based on two-photon-absorption. The first stage of the filter transmits a dual transmission line, and a subsequent portion of the filter partions the output of the first stage into two separate transmission channels.
摘要翻译： 可调谐滤光器包括被配置为在具有所选频带内的频率的线性偏振信号光束的一部分上进行偏振旋转的介质，其中所述介质在所述频带内是圆形双折射的，并且其中所述偏振旋转基于 双光子吸收。 滤波器的第一级传输双传输线，并且滤波器的后续部分将第一级的输出分成两个单独的传输信道。
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公开(公告)号：US09091590B2
公开(公告)日：2015-07-28
申请号：US13728907
申请日：2012-12-27
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
CPC分类号： G01J3/02 , G01N21/31 , G01N2021/1793
摘要： A method and apparatus is disclosed for measurement of probe light frequency. The apparatus includes an optical spectrometer comprised of a medium of rapidly changing circular birefringence. The circular birefringent medium changes the polarization of probe light an amount that is dependent upon probe light frequency. Thus probe light frequency is deduced by analyzing probe light polarization after it propagates through the birefringent medium. The birefringent medium is constructed from a gaseous substance and a magnetic field, where the gaseous substance has one or more absorption lines near the probe light frequency. The magnetic field permeates the gaseous substance and shifts the frequency of the absorption line(s) by the Zeeman effect. The method includes probe light emitted from a transmitter, which scatters off of a target, then the scattered probe light is collected and transmitted through the optical spectrometer where frequency is measured. With measurement of probe light frequency, a variety of information about the target can be deduced.
摘要翻译： 公开了用于测量探针光频率的方法和装置。 该装置包括由快速变化的圆形双折射介质构成的光谱仪。 圆形双折射介质将探针光的极化改变为取决于探针光频率的量。 因此，探测光频率在传播穿过双折射介质后通过分析探测光偏振来推断。 双折射介质由气体物质和磁场构成，其中气体物质在探测光频率附近具有一个或多个吸收线。 磁场渗透气态物质，并通过塞曼效应移动吸收线的频率。 该方法包括从发射器发射的探测光，其从目标物散射，然后将散射的探测光收集并透射通过测量频率的光谱仪。 通过测量探头光频率，可以推导出关于目标的各种信息。
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公开(公告)号：US09366572B2
公开(公告)日：2016-06-14
申请号：US14531902
申请日：2014-11-03
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
CPC分类号： G01J3/0224 , G02B5/3083 , G02B27/288 , G02F1/0126 , G02F1/091 , G02F2203/055
摘要： An apparatus is disclosed for filtering of probe light and measurement of probe light frequency. The apparatus includes an optical filter comprised of a medium of rapidly changing circular birefringence. The circular birefringent medium changes the polarization of probe light such that light within a certain frequency bandwidth is rotated between crossed polarizers so it will be transmitted through the second polarizer. The spectrometer rotates the polarization of probe light an amount that is dependent upon probe light frequency. Probe light frequency is deduced by analyzing probe light polarization after it propagates through the birefringent medium. The birefringent medium is constructed from a gaseous substance and a magnetic field, where the gaseous substance has one or more absorption lines near the probe light frequency. The magnetic field permeates the gaseous substance and shifts the frequency of the absorption line(s) by the Zeeman effect.
摘要翻译： 公开了一种用于滤波探测光和探测光频率测量的装置。 该装置包括由快速变化的圆形双折射介质组成的滤光器。 圆形双折射介质改变探针光的偏振，使得在一定频率带宽内的光在正交偏振器之间旋转，使得其将被透射通过第二偏振器。 光谱仪将探针光的极化旋转取决于探针光频率。 通过分析探针光偏振在其穿过双折射介质传播之后推导出探针光频率。 双折射介质由气体物质和磁场构成，其中气体物质在探测光频率附近具有一个或多个吸收线。 磁场渗透气态物质，并通过塞曼效应移动吸收线的频率。
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公开(公告)号：US20150124319A1
公开(公告)日：2015-05-07
申请号：US14531965
申请日：2014-11-03
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
CPC分类号： G02F1/091 , G02B27/288 , G02F1/3526 , G02F2202/40
摘要： An apparatus is disclosed for filtering of probe light. The apparatus includes an optical filter comprised of a medium circular birefringence between crossed polarizers. The circular birefringent medium changes the polarization of light of a particular frequency bandwidth. So that after passing through the first polarizer, the polarization of a particular frequency bandwidth probe light is rotated between crossed polarizers so it will be transmitted through the second polarizer. The birefringent medium is constructed from a gaseous substance such as atomic vapor and two pump lasers in resonance with absorption lines of the absorbing substance by the process of two-photon absorption. A magnetic field is utilized in some embodiments that permeates the absorbing substance and separates absorption lines for excited state transitions by the Zeeman effect.
摘要翻译： 公开了一种用于过滤探测光的装置。 该装置包括由交叉偏振器之间的中等圆形双折射率组成的滤光器。 圆形双折射介质改变特定频率带宽的光的偏振。 使得在通过第一偏振器之后，特定频率带宽探测光的偏振在交叉偏振器之间旋转，使得其将被透射通过第二偏振器。 双折射介质由诸如原子蒸汽的气态物质和通过双光子吸收过程与吸收物质的吸收线共振的两个泵激光器构成。 在一些实施方案中利用磁场渗透吸收物质并通过塞曼效应分离用于激发状态跃迁的吸收线。
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5.发明授权公开(公告)号：US12025495B2
公开(公告)日：2024-07-02
申请号：US17750264
申请日：2022-05-20
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
摘要： A light frequency standard for use as an optical clock is disclosed that is improved by optical pumping. Optical pumping is utilized to change the ground states of the atomic vapor from transition-forbidden to transition-allowed ground states involved in two-photon absorption process. Using an optical pump creates a stronger absorption line signal used for locking the laser to an absolute frequency. An optical spectrometer based upon two-photon absorption is disclosed that is improved by optical pumping, utilizing two optical pumps. The first optical pump provides photons that may combine with probe light for two-photon absorption, but it also depletes absorbing atoms that are in ground states. The second optical pump replenishes the supply of absorbing atoms into ground states allowing two-photon absorption between the first optical pump and the probe light. Two-photon absorption between the second pump light and the probe light is forbidden due to energy mismatch.
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公开(公告)号：US20130208276A1
公开(公告)日：2013-08-15
申请号：US13728907
申请日：2012-12-27
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
IPC分类号： G01J3/02
CPC分类号： G01J3/02 , G01N21/31 , G01N2021/1793
摘要： A method and apparatus is disclosed for measurement of probe light frequency. The apparatus includes an optical spectrometer comprised of a medium of rapidly changing circular birefringence. The circular birefringent medium changes the polarization of probe light an amount that is dependent upon probe light frequency. Thus probe light frequency is deduced by analyzing probe light polarization after it propagates through the birefringent medium. The birefringent medium is constructed from a gaseous substance and a magnetic field, where the gaseous substance has one or more absorption lines near the probe light frequency. The magnetic field permeates the gaseous substance and shifts the frequency of the absorption line(s) by the Zeeman effect. The method includes probe light emitted from a transmitter, which scatters off of a target, then the scattered probe light is collected and transmitted through the optical spectrometer where frequency is measured. With measurement of probe light frequency, a variety of information about the target can be deduced.
摘要翻译： 公开了用于测量探针光频率的方法和装置。 该装置包括由快速变化的圆形双折射介质构成的光谱仪。 圆形双折射介质将探针光的极化改变为取决于探针光频率的量。 因此，探测光频率在传播穿过双折射介质后通过分析探测光偏振来推断。 双折射介质由气体物质和磁场构成，其中气体物质在探测光频率附近具有一个或多个吸收线。 磁场渗透气态物质，并通过塞曼效应移动吸收线的频率。 该方法包括从发射器发射的探测光，其从目标物散射，然后将散射的探测光收集并透射通过测量频率的光谱仪。 通过测量探头光频率，可以推导出关于目标的各种信息。
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7.发明申请公开(公告)号：US20220404198A1
公开(公告)日：2022-12-22
申请号：US17750264
申请日：2022-05-20
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
摘要： A light frequency standard for use as an optical clock is disclosed that is improved by optical pumping. Optical pumping is utilized to change the ground states of the atomic vapor from transition forbidden to transition allowed ground states involved in two-photon absorption process. The added element of an optical pump increases the absorbers available in the two-photon process and creates a stronger absorption line signal used for locking the laser to an absolute frequency.
An optical spectrometer based upon two-photon absorption is disclosed that is improved by optical pumping. In this case, two optical pumps are used, One optical pump provides photons for two-photon absorption, but it also depletes absorbing atoms that are in ground states where two-photon absorption is allowed. The other optical pump replenishes the supply of absorbing atoms into ground states allowing two-photon absorption. The spectrometer is useful for measuring Doppler shift with LIDAR.-
公开(公告)号：US20160123807A1
公开(公告)日：2016-05-05
申请号：US14531902
申请日：2014-11-03
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
CPC分类号： G01J3/0224 , G02B5/3083 , G02B27/288 , G02F1/0126 , G02F1/091 , G02F2203/055
摘要： An apparatus is disclosed for filtering of probe light and measurement of probe light frequency. The apparatus includes an optical filter comprised of a medium of rapidly changing circular birefringence. The circular birefringent medium changes the polarization of probe light such that light within a certain frequency bandwidth is rotated between crossed polarizers so it will be transmitted through the second polarizer. The spectrometer rotates the polarization of probe light an amount that is dependent upon probe light frequency. Probe light frequency is deduced by analyzing probe light polarization after it propagates through the birefringent medium. The birefringent medium is constructed from a gaseous substance and a magnetic field, where the gaseous substance has one or more absorption lines near the probe light frequency. The magnetic field permeates the gaseous substance and shifts the frequency of the absorption line(s) by the Zeeman effect.
摘要翻译： 公开了一种用于滤波探测光和探测光频率测量的装置。 该装置包括由快速变化的圆形双折射介质组成的滤光器。 圆形双折射介质改变探针光的偏振，使得在一定频率带宽内的光在正交偏振器之间旋转，使得其将被透射通过第二偏振器。 光谱仪将探针光的极化旋转取决于探针光频率。 通过分析探针光偏振在其穿过双折射介质传播之后推导出探针光频率。 双折射介质由气体物质和磁场构成，其中气体物质在探测光频率附近具有一个或多个吸收线。 磁场渗透气态物质，并通过塞曼效应移动吸收线的频率。
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公开(公告)号：US07876445B1
公开(公告)日：2011-01-25
申请号：US12496032
申请日：2009-07-01
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
摘要： A tunable optical spectrometer is disclosed that includes a medium configured to perform polarization rotation within a frequency band on a linearly polarized test beam, wherein the medium is circularly birefringent, and wherein the polarization rotation is achieved based on two-photon-absorption. The medium includes a gaseous substance, a reference laser beam of circular polarization and a longitudinal magnetic field. The test beam propagates through the medium twice, once in the same direction as the magnetic field, and once in the opposite direction of the magnetic field. The test beam undergoes polarization rotation an amount that depends upon the frequency of the test beam.
摘要翻译： 公开了一种可调谐光谱仪，其包括被配置为在线偏振测试光束上在频带内进行偏振旋转的介质，其中所述介质是圆形双折射的，并且其中所述偏振旋转基于双光子吸收来实现。 介质包括气态物质，圆偏振的参考激光束和纵向磁场。 测试光束通过介质传播两次，一次与磁场相同，一次与磁场相反。 测试光束经受极化旋转，其量取决于测试光束的频率。
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公开(公告)号：US20110001979A1
公开(公告)日：2011-01-06
申请号：US12496032
申请日：2009-07-01
申请人： Joseph Daniel Vance
发明人： Joseph Daniel Vance
IPC分类号： G01J3/45
摘要： A tunable optical spectrometer is disclosed that includes a medium configured to perform polarization rotation within a frequency band on a linearly polarized test beam, wherein the medium is circularly birefringent, and wherein the polarization rotation is achieved based on two-photon-absorption. The medium includes a gaseous substance, a reference laser beam of circular polarization and a longitudinal magnetic field. The test beam propagates through the medium twice, once in the same direction as the magnetic field, and once in the opposite direction of the magnetic field. The test beam undergoes polarization rotation an amount that depends upon the frequency of the test beam.
摘要翻译： 公开了一种可调谐光谱仪，其包括被配置为在线偏振测试光束上在频带内进行偏振旋转的介质，其中所述介质是圆形双折射的，并且其中所述偏振旋转基于双光子吸收来实现。 介质包括气态物质，圆偏振的参考激光束和纵向磁场。 测试光束通过介质传播两次，一次与磁场相同，一次与磁场相反。 测试光束经受极化旋转，其量取决于测试光束的频率。
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