Abstract

We propose a linewidth-narrowing mechanism in lasers by nonlinear absorptive wave mixing of the counterpropagating beams in the cavity. We give a theoretical analysis and report on a demonstration of the effect with an erbium-doped fiber laser. The system also exhibits bistability in the dependence of the oscillation intensity versus pump power.

© 1994 Optical Society of America

Nonlinear wave mixing and induced gratings in erbium-doped fiber amplifiers

Baruch Fischer, John L. Zyskind, James W. Sulhoff, and David J. DiGiovanni
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Laser linewidth narrowing induced by amplifier gain saturation

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