Supercontinuum generation in the normal dispersion regime using chalcogenide double-clad fiber

Abstract

We experimentally demonstrate mid-infrared (MIR) supercontinuum (SC) generation in a 2.8-cm-long chalcogenide double-clad fiber (Ch-DCF). The Ch-DCF made of As2Se3, AsSe2, and As2S5 glasses has near-zero chromatic dispersion in the normal dispersion regime. We pump the Ch-DCF using a 200 fs pulse laser at 10 µm, and obtain MIR SC extending from 2 to 14 µm. Numerical results show that the Ch-DCF has the potential of generating a highly coherent MIR SC light source.

Coherent supercontinuum generation in tellurite glass regular lattice photonic crystal fibers

“…The demonstrated tellurite glass ANDi PCFs also extend the current state-of-the-art in fibers designed for pulse-preserving, femtosecond supercontinuum generation, under pumping with lasers operating at standard wavelengths. Up to date, this line-up included fibers made of silica and germanium-doped silica fibers [28,29] and highly nonlinear silicate fibers [39], as well as ANDi chalcogenide glass fibers and waveguides, enabling at least an octave of normal dispersion supercontinuum under femtosecond pumping around 2070 nm [41] or at around 2700-2800 nm [42][43][44][45]. Fig.…”

Design of W-Type Index Chalcogenide Fiber for Highly Coherent Mid-IR Supercontinuum Generation

“…Finite element method (FEM) is the most efficient approach to design a waveguide on its 2D cross-section [17]. This technique can be used to analyze waveguides with complex geometries such as a photonic crystal fiber (PCF) [18], a nanowire [19] and a double cladding fiber [20]. In this study, FEM based edge elements are used to evaluate the properties of W-type index fiber, such as the effective index, the chromatic dispersion and the effective mode area.…”