Patent ID: 9444476
Filing Date: 2016-09-13
CPC Classification: G04F,H01S,H03B,H03L

Claim Text:
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.