Efficient and wide supercontinuum generation in dispersion engineered tellurite clad As2S3 core photonic crystal fiber within 1 mm of fiber length

Abstract

We present broadband supercontinuum generation in dispersion engineered tellurite clad As2S3 core photonic crystal fiber. Finite element method (FEM) is adopted for different numerical analysis of the fiber. The design is so engineered that zero dispersion is obtained at 1550-nm wavelength. Very high nonlinearity is achieved in the proposed structure as 5.5 × 104 W − 1 km − 1. For a 20 fs input pulse with 3-kW peak power, the fiber presents a wideband supercontinuum spectrum spanning a huge bandwidth of 11,454 nm using just 1-mm length of fiber. This might play a vital role in ultra-broadband signal amplification, biomedical imaging, biophotonics, and spectroscopy.