发明名称 |
Atomic oscillator and interrogation method of coherent population trapping resonance |
摘要 |
An atomic oscillator includes an alkali-metal cell in which alkali-metal atoms are enclosed, a light source which irradiates the atoms in the alkali-metal cell with laser beams, a photodetector which detects a light amount of the laser beams passing through the alkali-metal cell to enter the photodetector, and a controller which generates sidebands including a pair of laser beams with different wavelengths by performing frequency modulation of a carrier on the light source, causes the pair of laser beams with the different wavelengths to enter the alkali-metal cell, and controls a modulation frequency according to optical absorption characteristics of the atoms by quantum interference effects of a pair of resonance laser beams, wherein the side bands include second-order or higher-order sidebands. |
申请公布号 |
US9444476(B2) |
申请公布日期 |
2016.09.13 |
申请号 |
US201314420709 |
申请日期 |
2013.08.28 |
申请人 |
RICOH COMPANY, LTD.;Tokyo Metropolitan University |
发明人 |
Goka Shigeyoshi;Yano Yuichiro |
分类号 |
G04F5/14;H03B17/00;H03L7/26;H01S5/00;H01S5/0687 |
主分类号 |
G04F5/14 |
代理机构 |
Cooper & Dunham LLP |
代理人 |
Cooper & Dunham LLP |
主权项 |
1. An atomic oscillator comprising:
an alkali-metal cell in which alkali-metal atoms are enclosed; a light source configured to irradiate the atoms in the alkali-metal cell with laser beams; a photodetector configured to detect a light amount of the laser beams passing through the alkali-metal cell to enter the photodetector; a controller configured to generate a pair of laser beams with different wavelengths by performing frequency modulation of a carrier on the light source, cause the pair of laser beams with the different wavelengths to enter the alkali-metal cell, and control a modulation frequency according to optical absorption characteristics of the atoms by quantum interference effects of a pair of resonance laser beams, wherein the laser beams entering the alkali-metal cell are pulsed laser beams; and a detector configured to detect a Ramsey interrogation signal, in a pulsed interrogation mode, wherein the pair of laser beams with the different wavelengths are both third-order sidebands, to permit the modulation frequency for the Ramsey interrogation signal to be reduced. |
地址 |
Tokyo JP |