摘要
为了抑制被动式铷钟除抽运光外杂散光的干扰,降低光谱灯的光噪声对信噪比的影响,设计制作了带宽30 nm的带通滤光片。测试结果显示,铷钟的短期频率稳定度有了明显的提高。分析了千秒以上稳定度变差的原因并给出了进一步改进的措施。
A 30 nm bandwidth of band pass filiter was designed and fabricated for restraining the scattering light and increasing the ratio Signal to Noise （S/N）. The test results show that the short term frequency stability has been evidently improved. The dropping reason of long term frequency stability was analysed and several improved approach was gived.
出处
《真空与低温》
2007年第3期151-154,167,共5页
Vacuum and Cryogenics
关键词
铷频标
带通滤光片
频率稳定度
rubidium atomic frequency standard
band pass filter
frequency stability
