钠蒸气中慢光用于光阻增强相对转动传感的实验限制
Experimental Constraints of Using Slow-Light in Sodium Vapor for Light-Drag Enhanced Relative Rotation Sensing
摘要：
我们报告了在原子钠蒸气中电磁感应透明和慢光（vg ~ c/607）的实验观察，作为最近提出的慢光增强相对旋转传感实验的潜在介质[11]。我们已经进行了与双光子共振相关的折射率变化的干涉测量，以估计与基于慢光的旋转传感方案相关的介质的色散特性。我们还表明，光学萨尼亚克环中反向传播的泵浦光束的存在会产生向后的光学相位共轭光束，该光束会产生杂散信号，这可能会使慢光增强陀螺仪中微小旋转的测量变得复杂。我们确定克服这种限制的技术。
英文摘要：
We report on experimental observation of electromagnetically induced transparency and slow-light (vg ~ c/607) in atomic sodium vapor, as a potential medium for a recently proposed experiment on slow-light enhanced relative rotation sensing [11]. We have performed an interferometric measurement of the index variation associated with a two-photon resonance to estimate the dispersion characteristics of the medium that is relevant to the slow-light based rotation sensing scheme. We also show that the presence of counter-propagating pump beams in an optical Sagnac loop produces a backward optical phase conjugation beam that can generate spurious signals, which may complicate the measurement of small rotations in the slow-light enhanced gyroscope. We identify techniques for overcoming this constraint.
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