Abstract
Contrary to traditional views considering loss a limiting factor for nonlinear photonics applications, a judicious loss management is currently playing a crucial role in different research areas in nonlinear optics ranging from plasmonics and -symmetric systems to pulse propagation in waveguides with 2D materials [1] or dispersive nonlinearities [2]. As this physics relies on interplays between nonlinear, dispersive (or diffractive) and loss (or gain) effects, an accurate measurement of the nonlinear coefficient γcannot disregard either chromatic dispersion β2or linear loss α, whereas state-of-the-art techniques require dispersionless [3] or lossless waveguides [4]. Moreover, such a measurement would aid theoretical ongoing research in discriminating competing nonlinear models founded on different assumptions [5]. Here we demonstrate a procedure for measuring β2/γ, and hence γif β2is available, under conditions where dispersion and loss are comparable to nonlinear effects.
© 2023 IEEE
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