AI 中文总结
研究原子干涉测量中布拉格衍射频率差的产生方式，提出用锯齿波调制由单频激光驱动布拉格脉冲，通过特定条件使相关脉冲和干涉仪对缺陷具鲁棒性，为超紧凑单频布拉格衍射原子干涉仪发展提供可能。
AI 中文摘要
传统上，原子干涉测量中的布拉格衍射需要两个激光频率，其频率差使双光子跃迁共振。我们表明，这种频率差可以通过锯齿波调制产生，从而允许用单频激光驱动布拉格脉冲。锯齿波调制使用由相位调制射频驱动的声光调制器进行，并在声光调制器载波频率之上产生千赫兹级的频移。虽然一般来说锯齿波调制会产生强烈的不需要的频率成分，但我们找到了一些条件，使得布拉格衍射脉冲以及由它们构成的原子干涉仪对这些缺陷具有鲁棒性，为基于锯齿波调制、由位置调制后向反射镜实现的超紧凑单频布拉格衍射原子干涉仪的发展打开了大门。
英文摘要
Bragg diffraction for atom interferometry conventionally requires two laser frequencies whose difference makes the two-photon transition resonant. We show that this frequency difference can instead be generated by serrodyne modulation, allowing Bragg pulses to be driven with a single-frequency laser. The serrodyne modulation is performed using an acousto-optic modulator driven with a phase-modulated RF drive, and generated kilohertz-scale frequency shifts on top of the AOM carrier frequency. While in general serrodyne modulation generates strong unwanted frequency components, we find conditions so that the Bragg diffraction pulses, and atom interferometers constructed from them, are robust to these imperfections, opening the door to the development of ultra compact, single frequency Bragg diffraction based atom interferometers with serrodyne modulation implemented by a position modulated retroreflection mirror.
Comments23 pages, 12 figures
