We have observed a high Raman gain in a quasi-stationary state realized by a single strong-pulsed-pump laser. The Raman gain, originating from the population inversion in the dressed state picture, was as large as 1700% in a Λ system of three fine-structure levels of atomic samarium, corresponding to a gain cross section comparable with the linear absorption cross section for the same transition.
© 2007 Optical Society of America
Original Manuscript: March 9, 2007
Manuscript Accepted: April 26, 2007
Published: June 19, 2007
Myoung-Kyu Oh, Jai-Hyung Lee, and Kyungwon An, "Observation of a high Raman gain induced by a pulsed pump laser in a Λ system of three fine-structure levels," Opt. Lett. 32, 1809-1811 (2007)