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Amplified Spontaneous Emission on Sodium D-lines Using Nonresonant Optical Pumping

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We describe experiments on the excitation of amplified spontaneous emission on the D-lines of sodium (D2 = 588.9 nm; D1 = 589.6 nm) with longitudinal optical pumping with a large detuning from the D2 line toward shorter wavelengths. The radiation spectra are measured, showing gain on both lines, at a Na concentration of (1–5) × 1014 cm–3, buffer gas (helium) pressure of 600 Torr at the working temperature, and pumping power density of more than 1.5 MW/cm2. The time characteristics show that the output radiation varies versus the concentration of sodium atoms in the active medium. The dependences of radiation absorption at the D-lines of sodium on the concentration of Na atoms and buffer gas pressure are given.

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Correspondence to G. S. Evtushenko.

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Original Russian Text © T.D. Petukhov, G.S. Evtushenko, E.N. Tel’minov, 2017, published in Optika Atmosfery i Okeana.

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Petukhov, T.D., Evtushenko, G.S. & Tel’minov, E.N. Amplified Spontaneous Emission on Sodium D-lines Using Nonresonant Optical Pumping. Atmos Ocean Opt 31, 101–105 (2018).

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