Polychromatic forward-directed sub-Doppler emission from sodium vapour

30 Aug 2019 Akulshin Alexander M. Bustos Felipe Pedreros Rahaman Nafia Budker Dmitry

The mechanisms responsible for ultraviolet to mid-infrared light generation in sodium vapours two-photon excited with continuous-wave sub-100 mW power resonant laser radiation are elucidated from orbital angular momentum transfer of the applied light to the generated fields. The measured 9.5 MHz-wide spectral linewidth of the light at 819.7 nm generated by four-wave mixing, sets an upper limit to the linewidth of two fields resulting from amplified spontaneous emission at 2338 nm and 9093 nm on population inverted transitions... (read more)

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