Abstract
Efficient continuous resonant frequency mixing ω4 = ω1 − ω2 + ω3 in Na2 has been realized. A bichromatic field (λ1 = 488 nm, λ2 = 525 nm), generated by an Ar+-laser-pumped Na2 Raman laser, and radiation at λ3 = 655 nm from a dye laser interact resonantly with corresponding transitions → B1Πu(6, 43) → in a test Na2 heat pipe. For input powers of 200, 25, and 400 mW an output beam of as much as 0.2 mW at λ4 = 599 nm has been observed. Measured parameter dependences indicate an influence of interference effects. This is directly related to the discussion of lasing without inversion.
© 1996 Optical Society of America
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