Abstract
Abstract
In this paper, we report the design and fabrication of a highly birefringent polarization-maintaining photonic crystal fiber made from chalcogenide glass, and its application to linearly-polarized supercontinuum generation in the mid-infrared region. The fiber was drawn using the casting method from As38Se62 glass which features a transmission window from 2 to 10 μm and a high nonlinear index of 1.13 × 10–17 m2 W−1. It has a zero-dispersion wavelength (ZDW) at 4.56 μm for the fast axis and 4.68 μm for the slow axis and, at average ZDW, a large birefringence of 6.5 × 10–4 and consequently strong polarization maintaining properties are expected. Using this fiber, we experimentally demonstrate supercontinuum generation spanning from 3.1 to 6.02 μm and 3.33–5.78 μm using femtosecond pumping at 4 μm and 4.53 μm, respectively. We further investigate the supercontinuum bandwidth versus the input pump polarization angle and we show very good agreement with numerical simulations of the two-polarization model based on two coupled generalized nonlinear Schrödinger equations.
Funder
European Union’s Horizon 2020 Research and Innovation Programme
Agence Nationale de la Recherche
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials
Cited by
34 articles.
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