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<sup>−13</sup> level between 1~10<sup>4</sup>s averaging time. A new scheme of laser frequency stabilization and shift is realized and the laser power is stabilized to the 10<sup>−5</sup> level between 1~10<sup>4</sup>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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