Study and Analysis of Photonic Crystal Fiber for Broadband Laser Source Design

Abstract

Photonic Crystal Fiber (PCF) has been a topic of
extensive research in the field of nonlinear fiber optics. It is due to
its
combination of linear and nonlinear properties which
ultimately results in the phenomenon having various types of
applications. One of the phenomena is supercontinuum generation
that has been extensively studied numerically and experimentally
over the last few decades as it has important applications in the
field of medical imaging and sensing. In this paper, we numerically
analysed and studied PCF of hexagonal core with various
parameters and propose our novel ‘Star in Hexagon’ design as a
good candidate for the broadband supercontinuum generation
and hence a broadband laser source. We numerically pumped a
long 10 mm PCF of this kind at 3.1 µm wavelength with a pulse
having a power of 4000 W and a temporal width of 50 fs. A
broadband supercontinuum ranging from 1.7 µm to 18 µm was
obtained. The generated spectrum is quite well in the mid-infrared
region. Hence it can be utilised for Mid – Infrared (MIR)
applications.