Stimulated Raman scattering cascade spanning the wavelength range of 523 to 1750~nm using a graded-index multimode optical fiber

TL;DR

This paper demonstrates a Raman cascade in a graded-index multimode optical fiber covering 523 to 1750 nm, showing beam cleanup despite multimode pump conditions, expanding the potential for broadband light sources.

Contribution

It presents the first demonstration of a Raman cascade spanning this broad wavelength range in a standard multimode fiber with beam cleanup effects.

Findings

Raman cascade achieved from 523 to 1750 nm

Substantial beam cleanup observed during process

Broadband generation in standard multimode fiber

Abstract

We report on the generation of a Raman cascade spanning the wavelength range of 523 to 1750 nm wavelength range, in a standard telecommunication graded-index multimode optical fiber. Despite the highly multimode nature of the pump, the Raman peaks are generated in specific modes of the fiber, confirming substantial beam cleanup during the stimulated Raman scattering process.