Abstract

We report a polarization maintaining chalcogenide (ChG) photonic quasicrystal fiber (PQF) for wide-band mid-IR (MIR) supercontinuum (SC) generation. The numerical demonstration of SC generation in the proposed PQF spans from 2 to 15 μm wavelengths for a pulse power of 2 kW. Besides, the proposed PQF offers a high birefringence (${10}^{-3}$ to ${10}^{-2}$) from 3.5 to 15 μm wavelengths and exhibits a low confinement loss (${10}^{-7}$ to ${10}^{-1}$) for the wavelengths from 2 to 15 μm with single mode behavior. The proposed ${\mathrm{Ge}}_{11.5}{\mathrm{As}}_{24}{\mathrm{Se}}_{64.5}$ PQF is designed with zero dispersion wavelengths (ZDWs) at 4.33 and 4.46 μm for $X$ and $Y$ polarized modes within the wavelength range of 2–15 μm. The polarized spectral broadening of the continuum is realized for the first time from 2 to 15 μm using the proposed PQF with a length of 8 mm. Hence, the two orthogonally polarized modes allow the high degree of freedom in tuning the properties of the SC. Thus, the proposed PQF-based SC source is a good candidate for applications such as optical sensing, frequency metrology, and optical tomography.

© 2017 Optical Society of America

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