缓冲气体Rb池中λ系统吸收增强的窄共振和衬度共振
Narrow and contrast resonance of increased absorption in Lambda-system observed in Rb cell with buffer gas
摘要：
我们报告观察到一个狭窄的（亚自然）和高对比度的共振增加吸收（“明亮”的共振）在Rb细胞与Ne缓冲气体在以前未探索的实验条件下耦合和探针辐射配置。耦合激光器稳定的频率从5S 1/2，Fg=3 -> 5 P 3/2，Fe= 2，3，4跃迁失谐约3GHz，而探测激光器频率在这些跃迁上扫描。我们认为，当探测激光频率从耦合频率蓝移一个基态超精细分裂值时，明亮共振的形成主要是由探测辐射5S 1/2，Fg=2 -> 5S 1/2，Fg=3和5 P 3/2作为中间态的双光子吸收引起的。我们还报道和解释了在中等磁场（B ~ 10 - 250 G）中明亮共振分裂成6个分辨良好的对比度分量。
英文摘要：
We report observation of a narrow (sub-natural) and high-contrast resonance of increased absorption ("bright" resonance) in Rb cell with Ne buffer gas under previously unexplored experimental conditions for coupling and probe radiation configuration. The coupling laser stabilized frequency is detuned by ~ 3 GHz from 5S1/2, Fg=3 --> 5P3/2, Fe=2,3,4 transitions, while the probe laser frequency is scanned across these transitions. We believe the bright resonance formation, occurring when the probe laser frequency is blue-shifted from the coupling frequency by a value of the ground state hyperfine splitting, is caused predominantly by a 2-photon absorption of the probe radiation 5S1/2, Fg=2 --> 5S1/2, Fg=3 with 5P3/2 as an intermediate state. We also report and interpret splitting of the bright resonance into 6 well resolved and contrast components in moderate magnetic fields (B ~ 10 - 250 G).
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