Rb蒸气中四波混频产生的准直蓝光
Collimated blue light generated by four-wave mixing in Rb vapour
摘要：
我们研究了Rb蒸气中低功率连续波共振辐射的频率上转换随各种实验参数的变化。我们提出的证据表明，四波混频的过程是负责单向蓝光产生和沿光诱导波导的相位匹配条件确定的方向和发散的蓝光。速度选择性激发到5D水平通过逐步和双光子过程的结果在多普勒自由依赖于所施加的激光场的频率失谐从各自的偶极允许的过渡。讨论了产生紫外光的可能方案。
英文摘要：
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.
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