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

Phase analysis of nonlinear femtosecond pulse propagation and self-frequency shift in optical fibers

Phase sensitive analysis of femtosecond pulse propagation in optical fibers employing frequency resolved optical gating (FROG) is presented and compared to numerical simulations employing a modified cubic nonlinear Schr€ odinger equation (NLSE). Phase information obtained from deconvolution of the experimental traces allows the observation and characterization of specific pulse propagation feat...

Self-phase modulation in chirped-pulse amplification.

The effect of self-phase modulation in chirped-pulse amplification is investigated. A numerical model is used to predict the effects of phase modulation on pulse recompression, and experimental results are presented that agree well with the calculations. We show that even moderate self-phase modulation can significantly distort the recompressed pulse after amplification, thereby reducing the pe...

Self-phase modulation and optical pulse compression influenced by stimulated Raman scattering in fibers

We have investigated experimentally the influence of stimulated Raman scattering, under conditions of pulse walkoff, on the propagation of mode-locked 1.06-,um pulses in single-mode, polarization-preserving fibers and on their subsequent pulse compression. Intense stimulated Raman scattering preferentially depletes (and steepens) the leading edge of 1.0 -,4m pump pulses and clamps the pump puls...

Self-Guided Intense Laser Pulse Propagation in Air

Propagating modes in gain-guided optical fibers.

Optical fibers in which gain-guiding effects are significant or even dominant compared with conventional index guiding may become of practical interest for future high-power single-mode fiber lasers. I derive the propagation characteristics of symmetrical slab waveguides and cylindrical optical fibers having arbitrary amounts of mixed gain and index guiding, assuming a single uniform transverse...