一种微型化铷原子钟

An Ultra-miniature Rb Atomic Clock

报道了一种微型化铷原子钟,它采用一种新型陶瓷填充微波腔来减小物理部分体积,其铷光谱灯采用升压电路以实现快速点亮,整机电子线路采用低电压技术,在国内首次对这类铷钟实现12 V直流供电,并且首次对这类铷钟加入与外秒同步的功能。该铷原子钟体积为190 mL,开机3 min后可实现锁定,锁定后频率稳定度为1.5×10-11/τ(1/2)(τ:1～1 000 s),稳态功耗为5.5 W。

An ultra-miniature Rb atomic clock is reported in this paper. For this Rb atomic clock, the microwave cavity is filled with a new type of ceramic material to reduce the physics package, the Rb spectrum lamp can lighten instantly with the aid of a voltage step-up circuit. Besides, it is the first time in China for this kind of clocks that the low voltage technique is applied to the circuits to realize 12 V （DC） supply and the output signal of this ultra-miniature Rb atomic clock can be synchronized with outside 1 PPS （1 pulse per second） signal. The volume of this Rb atomic clock is 190 mL and it can be locked in 3 minutes after starting. The frequency stability of this clock is 1.5× 10^-11/√τ （τ ： 1 - 1 000 s）, the power dissipation is 5.5 W for stable status.