Akulshin Alexander M, McLean Russell J, Sidorov Andrei I, Hannaford Peter
Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne, Australia.
Opt Express. 2009 Dec 7;17(25):22861-70. doi: 10.1364/OE.17.022861.
We investigate frequency up-conversion of low power cw resonant radiation in Rb vapour as a function of various experimental parameters. We present evidence that the process of four wave mixing is responsible for unidirectional blue light generation and that the phase matching conditions along a light-induced waveguide determine the direction and divergence of the blue light. Velocity-selective excitation to the 5D level via step-wise and two-photon processes results in a Doppler-free dependence on the frequency detuning of the applied laser fields from the respective dipole-allowed transitions. Possible schemes for ultraviolet generation are discussed.
我们研究了铷蒸汽中低功率连续波共振辐射的频率上转换作为各种实验参数的函数。我们提供的证据表明，四波混频过程负责单向蓝光的产生，并且沿光诱导波导的相位匹配条件决定了蓝光的方向和发散。通过逐步和双光子过程对5D能级进行速度选择性激发，导致对所施加激光场相对于各自偶极允许跃迁的频率失谐的无多普勒依赖性。讨论了产生紫外线的可能方案。
