As38 Se62 based segmented clad-graded index photonic crystal fiber for supercontinuum generation covering 3–9.5 μm with moderate peak power.

A novel Segmented Clad-Graded Index (SC-GI) photonic crystal fiber with a circular core composed of As38Se62 is proposed to realize the supercontinuum spectrum in the entire transparency range of As38Se62 (2–10 μm). SC-GI PCF conveys dual Zero Dispersion Wavelengths at around 2.4 μm and 6.4 μm. The devised PCF also offers a very small effective mode area of 2.46 μm2 and a very high nonlinear coefficient of 12,005 W−1 km−1 at the pump wavelength of 2.4 μm. Detailed numerical simulations reveal that a short length of SC-GI PCF (~ 28 mm) is capable of showing a broad SC spectrum ranging from 3 to 9.5 μm (− 30 dB level of power) using an input source of moderate peak power (1.8 kW) pumping at 3.4 μm. To the best of the author's knowledge, this is the first time report of SCG in Segmented Cladding Fiber design. The evaluated SC covers the transparency window of the background material and also covers the mid-IR region. This type of high broadening opens the gateway for applications like optical metrology, optical coherence tomography (OCT), food quality control, telecommunications and future applications covering the Mid-IR region.Please confirm the corresponding author is correctly identified and amend if necessary.Yes, Corresponding author is correctly mentioned. [ABSTRACT FROM AUTHOR]