Title :
Improvement of the signal-to-noise ratio of the clock signal for the frequency standard based on 113Cd+ ions
Author :
Miao, K. ; Zhang, J.W. ; Wang, S.G. ; Wang, Z.B. ; Wang, L.
Author_Institution :
NIM-THU Joint Inst. for Meas. Sci., Tsinghua Univ., Beijing, China
Abstract :
Microwave frequency standard based on laser-cooled 113Cd+ ions has promising performance. The fluorescence decays during detection are one of main limits to the signal-to-noise ratio (SNR) of clock signal. This phenomena is assumed cause by detection laser. We try to verify this assumption by rate equations. Two methods to improve SNR are also proposed.
Keywords :
clocks; fluorescence; frequency standards; laser cooling; measurement by laser beam; microwave detectors; microwave measurement; optical sensors; Cd; SNR; clock signal; fluorescence decay; laser detection; laser-cooled Cd ion; microwave frequency standard; signal-to-noise ratio; Clocks; Fluorescence; Ions; Laser transitions; Masers; Measurement by laser beam; Signal to noise ratio; SNR; fluorescence decay; microwave frequency;
Conference_Titel :
Frequency Control Symposium (FCS), 2014 IEEE International
Conference_Location :
Taipei
DOI :
10.1109/FCS.2014.6860002
