We describe a novel technique for stabilizing frequency shifts in laser-interrogated vapor-cell atomic clocks. The method suppresses frequency shifts due to changes in the laser frequency, intensity, and modulation index as well as atomic vapor density. The clock operating parameters are monitored by using the atoms themselves, rather than by using conventional schemes for laser frequency and cell temperature control. The experiment is realized using a chip-scale atomic clock. The novel atomic-based stabilization approach results in a simpler setup and improved long-term performance.
© 2006 Optical Society of America
Instrumentation, Measurement, and Metrology
Original Manuscript: February 6, 2006
Revised Manuscript: March 17, 2006
Manuscript Accepted: March 17, 2006
V. Gerginov, V. Shah, S. Knappe, L. Hollberg, and J. Kitching, "Atomic-based stabilization for laser-pumped atomic clocks," Opt. Lett. 31, 1851-1853 (2006)