We propose and demonstrate a novel detection scheme of clock signals and obtain an ultrahigh resonance contrast up to 90%, which leads to the remarkable improvement of the precision of the signal-to-noise ratio. The frequency stability in terms of Allan deviation of the proposed detection scheme is improved by an order of magnitude under equivalent conditions.
© 2012 Optical Society of America
Atomic and Molecular Physics
Original Manuscript: October 2, 2012
Manuscript Accepted: October 23, 2012
Published: December 4, 2012
Jinda Lin, Jianliao Deng, Yisheng Ma, Huijuan He, and Yuzhu Wang, "Detection of ultrahigh resonance contrast in vapor-cell atomic clocks," Opt. Lett. 37, 5036-5038 (2012)