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arXiv · 2306.13444

Nonlinear optical pulses in media with asymmetric gain

Sergei K. Turitsyn·Anastasia E. Bednyakova·Evgeniy V. Podivilov
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Abstract

A generic novel model governing optical pulse propagation in a nonlinear dispersive amplifying medium with asymmetric (linear spectral slope) gain is introduced. We examine the properties of asymmetric optical pulses formed in such gain-skewed media, both theoretically and numerically. We derive a dissipative optical modification of the classical shallow water equations that highlights an analogy between this phenomenon and hydrodynamic wave-breaking. We observe the development of spectral optical shock waves, and discuss the conditions and origins of this spectral wave-breaking in media with asymmetric gain. These findings provide insight into the nature of asymmetric optical pulses capable of accumulating large nonlinear phase without wave-breaking, a crucial aspect in the design of nonlinear fiber amplifiers.

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Sergei K. Turitsyn, Anastasia E. Bednyakova, Evgeniy V. Podivilov. 2023-06-23. Nonlinear optical pulses in media with asymmetric gain. https://doi.org/10.1103/physrevlett.131.153802

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