Amplification without population inversion

Olga A. Kocharovskaya; Paul Mandel; Yakov I. Khanin

doi:10.1117/12.131820

16 December 1992 Amplification without population inversion

Olga A. Kocharovskaya, Paul Mandel, Yakov I. Khanin

Proceedings Volume 1840, Transverse Patterns in Nonlinear Optics; (1992) https://doi.org/10.1117/12.131820
Event: XIV International Conference on Coherent and Nonlinear Optics, 1991, St. Petersburg, Russian Federation

Abstract

Three- and four-level schemes of inversionless amplification with different types of coherent pumping is reviewed. Amplification without inversion between the 'bare' states is a result of population inversion between eigenstates of the density matrix. In particular, it can be achieved due to the coherent population trapping, i.e., effective removal from the interaction with the field a fraction of atoms at lower levels.

Citation Download Citation

Olga A. Kocharovskaya, Paul Mandel, and Yakov I. Khanin "Amplification without population inversion", Proc. SPIE 1840, Transverse Patterns in Nonlinear Optics, (16 December 1992); https://doi.org/10.1117/12.131820

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