Title :
High contrast signal in a coherent population trapping based atomic frequency standard application
Author_Institution :
Agilent Lab., Palo Alto, CA, USA
Abstract :
A polarization-selective method is developed for detecting a coherent-population-trapping (CPT) resonance signal in a vapor cell. The method uses a single laser beam with frequency modulation to induce CPT resonance and to control the AC Stark shift. The method provides a CPT resonance signal with a high contrast of 22%. Using this method, a CPT-based rubidium vapor cell frequency standard demonstrates a measured short-term stability of 1.4×10-12τ- 12 /.
Keywords :
Stark effect; frequency modulation; frequency standards; laser beam effects; optical pumping; rubidium; signal detection; AC Stark shift; Rb; coherent population trapping based atomic frequency standard; coherent population trapping resonance signal; frequency modulation; polarization selective method; rubidium vapor cell frequency standard; short term stability; single laser beam; Atomic beams; Atomic clocks; Frequency; Optical devices; Optical filters; Optical interferometry; Optical modulation; Optical polarization; Optical sensors; Resonance;
Conference_Titel :
Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003 IEEE International
Print_ISBN :
0-7803-7688-9
DOI :
10.1109/FREQ.2003.1274978
