Chinese Optics Letters, 2015, 13 (9): 091201, Published Online: Sep. 14, 2018
Residual frequency drift in an atomic fountain clock Download: 865次
Abstract
We report a locking mode in which the local oscillator (LO) is locked to an atomic fountain and calibration of the residual frequency drift (RFD). In this running mode, the locked LO outputs a standard frequency signal, and a short-term fractional frequency stability of 2.7 × 10 13 τ 1 / 2 is achieved. Due to the frequency drift of the LO in free running mode, a systematic frequency bias, or RFD, exists after being locked by the atomic fountain. We analyze and measure the RFD with a value of 3 ( 2 ) × 10 16 . A sectionalized post-process method is adopted to calibrate the RFD.
Yuanbo Du, Rong Wei, Richang Dong, Fan Zou, Jinda Lin, Wenli Wang, Yuzhu Wang. Residual frequency drift in an atomic fountain clock[J]. Chinese Optics Letters, 2015, 13(9): 091201.