Products
Rubidium subminiature quantum frequency standard NAC-CPT
Fields of application:
- satellite navigation systems, including those integrated with inertial navigation systems
- synchronization of equipment and data transmission in high-speed computer networks
- communication systems, including broadband communication with fast carrier switching and wavelength-division multiplexing
- precision measuring equipment with strict requirements for the reference frequency generator (spectrum analyzers, vector generators, oscilloscopes, etc.)
The standard frequency is stabilized due to the effect of coherent population trapping (CPT). As a result of microwave modulation of the laser frequency, harmonics of the ± 1-order appear in the laser spectrum, which interact directly with the alkaline metal atoms in the gas cell. When the difference frequency between the harmonics is equal to the hyperfine splitting frequency of the ground state, a coherent nonabsorbing superposition of the atomic ground states arises. This effect is called CPT.
Dimensions | 60 cm3 |
Power consumption | 800 mW |
Output frequency | 5 and 10 MHz |
Short-term frequency instability (for 1 s) | 3 × 10-11 |
Long-term frequency instability (for 1 day) | 5 × 10-12 |
* Based on CPT compared to other small-sized standards
- physical block consists of:
-
emitting laser
- photodiode
- thermal stabilization system
- integral gas cell
- frequency standard control system
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