Generation of Self-Frequency-Shifted Solitons in Tapered Fibers in the Presence of Femtosecond Pumping

Abstract

Soliton self-frequency shift is realized for the first time in a tapered fiber, whose core with a diam- eter of 2.3 µ m is surrounded by air, in the presence of pump pulses with a duration of 55 fs and a wavelength of 805 nm. The self-frequency shift is observed up to a wavelength of 1127 nm. The soliton energy is about 23% of the total energy of the output light pulse. Good agreement between the results of numerical simulation of the soliton self-frequency shift based on the generalized Schrodinger equation and the experimental data is obtained.