Design of an efficient Mid-IR light source using As2S3 based highly nonlinear microstructured optical fibers

TL;DR

This paper presents the design of a highly nonlinear As2S3-based microstructured optical fiber that efficiently generates mid-infrared light at 4.3 μm through four-wave mixing, achieving high gain with low pump power.

Contribution

The paper introduces a novel chalcogenide microstructured fiber design optimized for mid-IR light generation with high nonlinearity and low pump power requirements.

Findings

Achieved 37 dB peak gain at 4.3 μm

Full width at half maximum of less than 3 nm

Operates with a pump power of only 5 W

Abstract

We report on the design of a highly-nonlinear specialty fiber as a mid-infrared light source at 4.3 {\mu}m. A meter length of the designed solid-core chalcogenide based index-guided microstructured optical fiber (MOF) with circular air holes has been exploited to translate wavelength via four wave mixing using a thulium-doped fiber laser as the pump with a relatively low peak power of 5 W. A peak gain value of around 37 dB with full width at half maxima (FWHM) less than 3 nm is achieved.