ATOMIC BEAM FREQUENCY STANDARD Russian patent published in 2010 - IPC H03L7/26 

FIELD: radio engineering.

SUBSTANCE: frequency standard comprises atomic beam tube with source of atomic bundle, microwave resonator and output photodetector device. Atomic beam tube includes window of optical detection and window of optical pumping, which are optically joined to outlet of laser module, besides the second joint is realised via modulator included into unit of optical pumping signal generation. Outlet of output photodetector device is connected via the first photodetection device and the first unit of automatic frequency tuning with the first control inlet of tuned quartz generator, outlet of which via unit of radio frequency excitation signal generation is connected to radio frequency inlet of microwave resonator. Outlet of output photodetector device is also connected via the second photodetection device, and the second unit of automatic frequency tuning to the first control inlet of controlled current stabiliser, outlet of which is connected to control inlet of laser module. Support inlets of the first automatic frequency tuning unit and unit of radio frequency excitation signal generation are connected to outlet of the first low-frequency generator, besides the second of these joints is realised via the first electronic switch. Support inlets of the second automatic frequency tuning unit and unit of controlled current stabiliser are connected to outlet of the second low-frequency generator, besides the second of these joints is realised via the second electronic switch. Unit of optical pumping signal generation, apart from specified modulator, comprises the third electronic switch and frequency synthesiser, besides inlet of frequency synthesiser is connected to outlet of tuned quartz generator, and outlet of frequency synthesiser via the third electronic switch is connected to control inlet of modulator. The second outlet of the first photodetection device is connected to the second control inlet of tuned quartz generator via the first device of automatic frequency searching, the second outlet of which is connected to control inlets of the first and second electronic switches. The second outlet of the second photodetection device is connected to the second control inlet of controlled current stabiliser via the second device of automatic frequency searching, the second outlet of which is connected to control inlets of the third electronic switch and the first automatic frequency searching device.

EFFECT: creation of atomic beam frequency standard, which operates according to double-frequency scheme realised with the help of single laser module, where initial values of frequencies in tuned quartz generator and laser module are automatically set in compliance with frequencies of used atomic transitions.

2 cl, 3 dwg