Kavli Affiliate: Frank Wise
| First 5 Authors: Yi-Hao Chen, Frank Wise, , ,
| Summary:
Noise can play an important role in nonlinear pulse propagation. It is not
only the origin of fluctuations in supercontinuum but can also determine the
generated signal amplitude and phase, as seen in phenomena such as noise-seeded
four-wave mixing and spontaneous Raman scattering. Current models rely on
input-pulse shot noise and Raman Langevin term to simulate noise-seeded Kerr
effects and spontaneous Raman scattering, respectively. However, they cannot
accurately simulate any nonlinear effects exhibiting asymmetries, for example,
between spontaneous Stokes and anti-Stokes generation, or in amplification with
emission and absorption cross sections. Moreover, combining these two
techniques does not lead to accurate modeling of both effects simultaneously,
especially in unsaturated Raman operational regimes or supercontinuum where
spontaneous Raman emission noise plays a crucial role. To resolve this issue,
we propose a new modified shot-noise model by directly introducing noise into
the pulse propagation equation. It minimally modifies current models that
contain only stimulated terms.
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