Demonstration of Stimulated Supercontinuum Generation - An Optical Tipping Point

TL;DR

This paper demonstrates that introducing a very weak seed signal can control supercontinuum generation, reducing power thresholds and stabilizing the broadband light, thus overcoming fluctuations that hinder many applications.

Contribution

It presents the first experimental demonstration of controlling supercontinuum generation using a weak seed, establishing an optical tipping point for enhanced stability.

Findings

Reduced input power threshold for supercontinuum generation

Significant increase in spectral and temporal stability

Controlled transition induced by a weak optical seed

Abstract

Optical supercontinuum radiation, a special kind of white light, has found numerous applications in scientific research and technology. This bright, broadband radiation can be generated from nearly monochromatic light through the cooperative action of multiple nonlinear effects. Unfortunately, supercontinuum radiation is plagued by large spectral and temporal fluctuations owing to the spontaneous initiation of the generation process. While these fluctuations give rise to fascinating behavior in the form of optical rogue waves [1], they impede many critical applications of supercontinuum. Here, we introduce, and experimentally demonstrate, a powerful means of control over supercontinuum generation by stimulating the process with a very weak optical seed signal [2]. This minute addition significantly reduces the input power threshold for the process and dramatically increases the stability of the resulting radiation. This effect represents an optical tipping point, as the controlled addition of a specialized, but extraordinarily weak perturbation powerfully impacts a much stronger optical field, inducing a drastic transition in the optical system.