Self-phase modulation effects and pulse propagation in gain-guided fibers

Abstract

We present a theoretical analysis of pulse propagation and self-focusing in a gain-guided (GG) fiber amplifier. A weak pulse is launched in the GG fiber when the input pulse reaches a critical power the pulse begins to collapse in the transverse direction. By using different input powers the transmission characteristics are changed. We add coupling to a single-mode fiber at the output end and study pulse dispersion and energy.

Keywords

• fiber laser
• fiber nonlinear optics
• transverse effects in nonlinear optics
• self-action effects