Observation of a high Raman gain induced by a pulsed pump laser in a Lambda system of three fine-structure levels.
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 Lambda 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.
Oh
Myoung-Kyu
MK
Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea.
Lee
Jai-Hyung
JH
An
Kyungwon
K