Unidirectional Doppler-free gain and generation in optically pumped lasers

S. Nakayama, Suteo Tsutsumi

W. Forysiak

N. Skribanowitz, Michael S. Feld, R. E. Francke +2 more

An optically pumped gas laser amplifier is described which exhibits gain only for waves traveling in a given direction while absorbing waves traveling in the opposite direction. The idea is based on the laser-induced line-narrowing effect in coupled Doppler-broadened transitions for the case of a high-intensity monochromatic pump field.

A. K. Popov, Vladimir M. Shalaev

An analysis is made of conditions for achieving amplification due to transitions whose Doppler broadening is eliminated (under optical pumping) by light shifts which depend on the atomic velocity. An investigation is made of the spectral characteristics of this amplification process and of the features of lasing due to these transitions. The advantages of lasing due to this type of pumping are shown and possibilities for achieving unidirectional lasing in ring resonators are indicated.

Thomas A. DeTemple, Ho Kyoon Chung, Samuel J. Petuchowski

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