QUANTUM FREQUENCY STANDARD ON GAS CELL WITH LASER OPTICAL PUMPING

摘要

FIELD: physics.;SUBSTANCE: quantum frequency standard comprises the following, connected in series into a closed ring: tuned crystal oscillator, a unit for generating exciting and reference signals, a first quantum discriminator unit, a first automatic frequency adjustment unit whose signal input is connected to the output of the first quantum discriminator unit, whose reference input is connected to the reference output of the unit for generating exciting and reference signals, and the output is connected to the control input of the crystal oscillator. The first quantum discriminator unit is made from a gas cell inside a microwave resonator. The radio frequency input of the resonator forms the radio frequency input of the first quantum discriminator unit and is connected to the radio frequency output of the signal generating unit. The optical input of the cell is connected to the first output of an optical splitter, whose input is connected to the output of a laser module, whose control input is connected through a second automatic frequency adjustment unit to the output of a second quantum discriminator unit, whose optical input is connected to the second output of the splitter. The second quantum discriminator unit is in form of an atomic-beam tube having an atomic beam source, an optical excitation window and a photodetector, whose output forms the output of the unit, connected to the input of the second frequency adjustment unit. The optical excitation window forms the optical input of the second quantum discriminator unit connected to the second output of the splitter with possibility of changing the angle of interaction of optical radiation with the atomic beam.;EFFECT: possibility of compensating for shift of resonance frequency of the radio frequency atomic transition used while increasing stability of frequency of radiation of the laser module.;2 cl, 1 dwg