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
Moshe Horowitz, Ron Daisy, Baruch Fischer, and John L. Zyskind, "Linewidth-narrowing mechanism in lasers by nonlinear wave mixing," Opt. Lett. 19, 1406-1408 (1994)