Polarization spectroscopy of an excited state transition in Rubidium
Polarization spectroscopy of an excited state transition in Rubidium
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DOI：
10.1364/osac.439037
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发表时间：
2021-10
期刊：
影响因子：
1.6
通讯作者：
Nourah F. Almuhawish;Shuying Chen;L. Downes;M. Jamieson;Andrew R. MacKellar;K. Weatherill
中科院分区：
文献类型：
--
作者：
Nourah F. Almuhawish;Shuying Chen;L. Downes;M. Jamieson;Andrew R. MacKellar;K. Weatherill
我们研究了室温铷蒸气中激发态跃迁的偏振光谱。通过应用与52S1/2→52P3/2跃迁共振的圆偏振耦合光束，我们在原子介质中诱导各向异性，然后通过扫描探测光束探测52P3/2→62S1/2跃迁。通过对探针光束进行偏振测量，观察到色散光谱特征。我们将激发态偏振谱表征为两种同位素耦合强度的函数，并发现在高强度下，Autler-Townes分裂导致一个子特征，理论模型表明多普勒平均增强了这个子特征。这种光谱技术产生窄色散信号，是理想的激光频率稳定激发态转变。
We investigate polarization spectroscopy of an excited state transition in room-temperature rubidium vapor. By applying a circularly polarized coupling beam, resonant with the 52S1/2 → 52P3/2 transition, we induce anisotropy in the atomic medium that is then probed by scanning a probe beam across the 52P3/2 → 62S1/2 transition. By performing polarimetry on the probe beam, a dispersive spectral feature is observed. We characterize the excited-state polarization spectrum as a function of coupling intensity for both isotopes and find that at high intensities, Autler-Townes splitting results in a sub-feature, which theoretical modelling shows is enhanced by Doppler averaging. This spectroscopic technique produces a narrow dispersive signal which is ideal for laser frequency stabilization to excited-state transitions.