原子饱和吸收谱谐波稳频短期稳定度研究  

Study on Laser Frequency Short-Term Stability

作　　者：陈超[1] 张剑[1] 刘新元[1] 汪中[1] 陈徐宗[1] 

机构地区：[1]北京大学电子学系,北京100871

出　　处：《光学学报》2004年第12期1649-1652,共4页Acta Optica Sinica

基　　金：国家自然科学基金(10074003)国家973计划(2001CB309308)教育部重大课题(00-90)资助课题

摘　　要：介绍了利用腔外饱和吸收谱的三次谐波和五次谐波稳频方法对半导体激光器进行稳频的原理,分析了使用这两种稳频方法对半导体激光器进行稳频时所得到的激光频率短期稳定度的理论估算方法,提出了通过选取最佳调制深度来优化短期稳定度的方法和原理,并在理论上比较了两种稳频方法得到的短期稳定度的差异。然后讨论了半导体激光稳频电路系统的设计,并利用该电路系统,分别用三次谐波和五次谐波稳频的方法将半导体激光器的频率锁定在的87Rb饱和吸收的F=2→F'=3,1线上,并使用我们提出的短期稳定度优化方案进行稳定度优化,通过对误差信号的分析,估算出的频率稳定度达到10-12的量级,使用采集到的误差信号在实验上比较了两种稳频方法所得的稳定度的,其结果和理论基本吻合。Firstly, the short-term stability of the laser's frequency stabilized is theoretically studied by methods of third and fifth harmonic, and the experiment of increasing the frequency short-term stability is performed. Secondly, the semiconductor laser's frequency stabilized circuit system is discussed, and by useing this system to take the rubidium 87's hyperfine spectra F = 2 F=3, 1 as reference frequency, that laser's frequency is stabilized by the third harmonic sign and fifth harmonic sign of saturated absorption spectra of 87Rb. The laser used is DL100 of TuiOptics, center wavelength is 780 nm, linewidth is 1 MHz, and finally a frequency stabilization got is 10-12. We computed the short-term stability generated by these two stablization technology theoretically is computed, and the calculated result with the experimental result is compared, and they were similar to each other.

关 键 词：激光技术 光频标 饱和吸收谱线 三次谐波和五次谐波 稳频电路系统 

分 类 号：TN248.1[电子电信—物理电子学]