Efficient Supercontinuum Generation in As2S3 Tapered Fiber Pumped by Soliton-Self Frequency Shifted Source

Abstract

We report an all-fiber supercontinuum generation system with high power conversion efficiency. A soliton compression stage followed by a supercontinuum generation stage lead to a power efficient supercontinuum that spans 1.5–2.7 µm.

High-order analytical formulation of soliton self-frequency shift

“…Figure (1) shows a typical case of temporal and spectral evolution of a fundamental soliton in a 50 long HNA silica fiber. Fiber parameters are propagation loss = 10 / , 2 = −77.19 2 / , 3 = 3.1 3 / , and waveguide nonlinear parameter 0 = 2.08 −1 / at the initial pulse wavelength of 0 = 1.94 [15]. The pulse duration and peak power are 185 and 1.08 , respectively.…”

“…The third fiber is a silica-based dispersion flattened and dispersion decreasing fiber (DF-DDF) to show the impact of 3 < 0 on the evolution of SSFS with propagation distance. and = 10 / at 0 = 1.94 [15]. The pulse under consideration is a fundamental soliton with a central wavelength of 0 = 1.94 , a duration of 185 and a peak power of 1.08 , to satisfy the soliton condition Eq.…”

“…in a high numerical aperture (HNA) fiber or a non-silica (e.g. ZBLAN and chalcogenide) fiber which often serve for wavelength conversion and supercontinuum generation [13][14][15][16][17][18][19]. Finally, Gordon s formula neglects the impact of propagation losses on SSFS which leads to misleading results e.g.…”