Optimization of sub-Doppler DAVLL on the rubidium D2 line
Optimization of sub-Doppler DAVLL on the rubidium D2 line
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DOI：
10.1088/0953-4075/41/8/085401
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发表时间：
2008-04-28
影响因子：
1.6
通讯作者：
Hughes, I. G.
中科院分区：
文献类型：
--
作者：
Harris, M. L.;Cornish, S. L.;Hughes, I. G.
我们讨论了亚多普勒 DAVLL 光谱的物理原理，该光谱采用具有轴向磁场的泵浦光束来诱导原子蒸气中的二色性。二色性是通过反向传播的探测光束测量的，而泵浦产生亚多普勒光谱特征。选择场的大小以将吸收特征的频率移动与其线宽相当的量。获得的参考信号非常适合无需频率调制的激光频率判别信号（激光“锁定”原子跃迁）。我们讨论了光谱对磁场、激光功率和偏振纯度的敏感性，并提出了 (87)Rb F = 2 --> F' = 3, 2 交叉跃迁的操作参数，以最大化信号幅度和梯度。
We discuss the physics of sub-Doppler DAVLL spectroscopy, which employs a pump beam with an axial magnetic field to induce dichroism in an atomic vapour. The dichroism is measured by a counterpropagating probe beam, while the pump generates sub-Doppler spectral features. The magnitude of the field is chosen to shift the frequency of the absorption features by an amount comparable to their linewidth. The reference signals obtained are ideal for laser frequency discriminant signals (laser 'locking' to the atomic transition) without frequency modulation. We discuss the sensitivity of the spectra to magnetic field, laser power and polarization purity, and suggest operating parameters for the (87)Rb F = 2 --> F' = 3, 2 crossover transition which maximize the signal amplitude and gradient.