title: Low-power-threshold photonic saturable absorber in nonlinear chalcogenide glass.
abstract: We experimentally demonstrate controllable nonlinear modulation of optical guiding in ultrafast laser-written evanescently coupled waveguide arrays in bulk gallium lanthanum sulfide chalcogenide glass. The intensity-dependent response is validated by simulating light propagation in waveguide arrays with instantaneous Kerr nonlinearity using a discrete-continuous spatiotemporal unidirectional Maxwell equation model. The intensity-driven modulation of transmission in multicore structures acts as a potential saturable absorber at kilowatt threshold levels.
authors: S
authors: S
authors: Minardi
authors: G
authors: G
authors: Cheng
authors: C
authors: C
authors: D'Amico
authors: R
authors: R
authors: Stoian