Numerical demonstration of widely tunable femtosecond soliton generation in chalcogenide microstructured fibers. (20th September 2019)

• Record Type: Journal Article
• Authors: Wang, F; Li, Q; Kang, Z; Wu, C F; Ding, D; Qin, G S; Yang, Z Y; Ohishi, Y
• Is Part Of: Laser physics letters. Volume 16:Number 10(2019:Oct.)
• Publication Date: 2019-09-20
• Subjects: femtosecond solitons -- widely tunable -- mid-infrared -- chalcogenide fibers; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/ab40a2
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We numerically investigated widely tunable femtosecond solitons spanning from 4.1 to 7.2 µ m in designed chalcogenide fibers with two rings of air holes. The core was made of Ge15 Sb15 Se70 glass and the cladding glass was composed of Ge20 As15 S65 . By using a 4.1 µ m fiber laser with a pulse width of 100 fs as the pump light and 1 m long chalcogenide microstructured fibers as the nonlinear media, widely tunable femtosecond solitons spanning from 4.1 to 7.2 µ m were observed, and the pulse width of these tunable Raman solitons remained below 150 fs. The efficiencies of the mid-infrared soliton could be up to over 80%, ranging from 4.1–6.8 µ m. Through numerical simulations, we also observed red-shifted dispersive waves varying from 10.2 to 8.9 µ m. Our simulated results show that the designed chalcogenide microstructured fibers are promising nonlinear media for generating tunable mid-infrared light sources.