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.
Keywordsactive optical system amplified spontaneous emission alkaline metals sodium optical pumping
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- 1.G. S. Evtushenko, “From a metal vapor laser projection microscope to a laser monitor (by the 50 year-anniversary of metal vapor lasers),” Proc. SPIE 9810, 98101F-1–98101F-9 (2015).Google Scholar
- 3.K. I. Zemskov, M. A. Kazaryan, and G. G. Petrash, “Image intensifier in projection optical systems,” in Trudy FIAN (Nauka, Moscow, 1991), vol. 206, p. 3–62 [in Russian].Google Scholar
- 4.C. E. Little, Metal Vapour Lasers: Physics, Engineering & Applications (John Wiley & Sons, Chichester, UK, 1998).Google Scholar
- 9.S. N. Atutov, A. I. Plekhanov, and A. M. Shalagin, “Lasing on the resonance transition in Na atoms under optical excitation,” Opt. Spektrosk. 56 (2), 215–222 (1984).Google Scholar
- 12.Z. Konefal and M. Ignaciuk, “Stimulated collision induced processes in sodium vapor in the presence of helium,” Appl. Phys. 51, 285–291.Google Scholar
- 14.GSSSD 112-87, Lithium, Sodium, Potassium, Rubidium, and Caesium. Saturated Vapor Pressure under High Temperatures (Izd-vo Standartov, Moscow, 1988) [inRussian].Google Scholar