A High-stability Compact Optical System for Integrating Sphere Cold Atom Clock
2022 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)(2022)
Abstract
SummaryA high-stability compact optical system is proposed for integrating sphere cold atom clock. Both an extended cavity diode laser with linewidth of about 50 kHz and a distribution feedback Bragg laser are applied as laser sources. The frequency of the former is locked with high frequency stability of the 10
−13
level between 1~10
4
s averaging time. A new scheme of laser frequency stabilization and shift is realized and the laser power is stabilized to the 10
−5
level between 1~10
4
s averaging time. The reasonable arrangement of the optical paths enables a compact system with a total size of 500mm×500mm×200mm.
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Key words
cold atom clock,optical system,laser stabilization,compactness
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