US 12,119,832 B2
Atomic oscillator
Sota Kagami, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Filed by NEC Corporation, Tokyo (JP)
Filed on Jan. 26, 2023, as Appl. No. 18/101,737.
Claims priority of application No. 2022-056941 (JP), filed on Mar. 30, 2022.
Prior Publication US 2023/0318610 A1, Oct. 5, 2023
Int. Cl. H03L 7/26 (2006.01)
CPC H03L 7/26 (2013.01) 10 Claims
OG exemplary drawing
 
1. An atomic oscillator comprising: an alkali metal cell; a light source configured to emit excitation light to the alkali metal cell; and a photodetector configured to detect transmission light passed through the alkali metal cell,
wherein a light absorber and a light radiator are placed, the light absorber being configured to raise a temperature thereof in accordance with absorption light to heat the alkali metal cell in contact with the alkali metal cell, the light radiator being configured to radiate light corresponding to heat of the alkali metal cell in contact therewith,
the atomic oscillator further comprising: a second light source configured to emit light to the light absorber; and a second photodetector configured to detect the light radiated by the light radiator.