Transmission properties of nonlinear multimode waveguide arrays

Multimode capillary waveguide arrays containing reverse-saturable absorbers exhibit an enhancement of the nonlinear response. Experimental data are modeled by the effect of partial mode filling, influenced by fill fraction and capillary diameter

Optical limiting in solid-core photonic crystal fibers

Optical limiting in solid-core photonic crystal fibers filled with reverse-saturable absorbers has been observed. A sharp change in limiting threshold was found for materials in the fiber holes with refractive indices near n = 1.44