Title :
Broadband Mid-Infrared Supercontinuum Spectra Spanning 2–15 μm Using As2Se3 Chalcogenide Glass Triangular-Core Graded-Index Photonic Crystal Fiber
Author :
Saini, Than Singh ; Kumar, Ajeet ; Sinha, Ravindra Kumar
Author_Institution :
Dept. of Appl. Phys., Center of Relevance & Excellence in Fiber Opt. & Opt. Commun., Delhi, India
Abstract :
In this paper, we report analysis, design, and numerical modeling of mid-infrared supercontinuum generation across 2-15 μm molecular “fingerprint region” using a new design of triangular-core graded-index photonic crystal fiber (PCF) pumped with 50 fs laser pulses of peak power of 3.5 kW at 4.1 μm. Proposed PCF design offers the nonlinear coefficient as high as 1944 W-1 · Km -1 at pump wavelength. To the best of our knowledge, the supercontinuum in PCF with such broadband spectra has been reported first time. Proposed PCF design has potential applications in gas sensing, food quality control, and early cancer diagnostics.
Keywords :
arsenic compounds; chalcogenide glasses; gradient index optics; high-speed optical techniques; holey fibres; infrared spectra; numerical analysis; optical design techniques; optical fibre testing; optical glass; optical pumping; photonic crystals; supercontinuum generation; As2Se3; broadband mid-infrared supercontinuum spectra; chalcogenide glass triangular-core graded-index photonic crystal fiber; early cancer diagnostic applications; food quality control applications; gas sensing applications; molecular fingerprint region; nonlinear coefficient; numerical modeling; power 3.5 kW; time 50 fs; wavelength 2 mum to 15 mum; Broadband communication; Glass; Optical fiber dispersion; Optical fibers; Photonic crystal fibers; Highly nonlinear photonic crystal fiber; Nonlinear optics; highly nonlinear photonic crystal fiber; mid-infrared supercontinuum; nonlinear optics;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2015.2418993
