Vol. 30, issue 10, article # 12

Petukhov T.D., Evtushenko G.S., Tel'minov E.N. Amplified spontaneous emission on sodium D-lines using nonresonant optical pumping. // Optika Atmosfery i Okeana. 2017. V. 30. No. 10. P. 888–892 [in Russian].
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Abstract:

Experiments are described on the excitation of amplified spontaneous emission on the D-lines of sodium (D2=588.9 nm; D1 = 589.6 nm) at longitudinal optical pumping with a large detuning from the D2 line toward shorter wavelengths. The radiation spectra are measured, which proves gain on the both lines, at  Na concentration of (1–5) ∙ 1014 cm3, 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.

Keywords:

active optical system, amplified spontaneous emission, alkaline metals, sodium, optical pumping

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