Abstract
Broadband supercontinuum generation is numerically investigated in a Xe-filled nested hollow-core antiresonant (HC-AR) fiber pumped at 3μm with pulses of 100fs duration and 15μJ energy. For a 25cm long fiber, under 7bar pressure, the supercontinuum spectrum spans multiple octaves from 400nm to 5000nm. Furthermore, the influence of bending on ultrafast nonlinear pulse propagation dynamics is investigated for two types of HC-AR fibers (nested and non-nested capillaries). Our results predict similar nonlinear dynamics for both fiber types and a significant reduction of the spectral broadening under tight bending conditions.
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