Influence of Lamp Spectral Profile on Short-Term Stability and Light Shift of a Rubidium Atomic Cloc

• 作 者: QiangHao[1]ShengguoHe[1]FengXu[1]FengZhao[2]GanghuaMei[2]
• 机 构: Key Laboratory of Atomic Frequency Standards of Chinese Academy of Sciences,Wuhan Institute of Physi
• 出 处: 第六届中国卫星导航学术年会
• 发表日期: 2015年期

　　Passive gas-cell rubidium atomic clock has been widely used in Global Navigation Satellite System (GNSS).Further improvement on the frequency stability ofrubidium atomic clocks has extreme significance forpromotingthe positioning and timing precision of GNSS.Distortion of the lamp spectral profile,caused by self-absorption,is a common concern for the design of a rubidium clock.However,few literature has systematically investigated the impact of lamp spectral profile on a Rb clock.In this work,the influence of lamp spectral profile on both short-term frequency stability and light shift of a rubidium clock was studied theoretically and experimentally.The results showedthat serious distortion of the lamp spectral profile could lead to one times deterioration to short-term frequency stability,and change the zero light shift point by a few degrees centigrade.Thus,we demonstrated thatoptimization of the lamp profile may be an effective way to improve the performance of aRb clock,which should be paid more attention when designing a high performance spaceborneRbclock.