Collimated blue light generated by four-wave mixing in Rb vapour

Details Collimated blue light generated by four-wave mixing in Rb vapour Collimated blue light generated by four-wave mixing in Rb vapour

2009-10-13

arxiv.org/abs/0910.2292v1

Physics

Quantum Physics

13 pages, 9 figures

Scientific paper

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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