Answers are grounded in this paper and cite their sources.
The fundamental mode of nonlinear optical fibres at ‘high’ power has fields e(x, y) which behave approximately like those of the linear or ‘low’ power fibre, but with the usual waveguide parameter V replaced by a simple power dependent VN to account for the nonlinearities.
No takes yet. Share an insight, caveat, or question.
Snyder et al. (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: