Gain effect and amplification characteristics analysis in fiber chirped pulse amplification systems

Abstract

A comprehensive method is proposed to investigate gain narrowing and the gain saturation effect in a fiber chirped pulse amplification system. It can solve the comprehensive gain effect in time and spectral domains simultaneously based on the nonlinear Schrödinger equation. Through numerical simulation under various pump powers, our simulation results benefit from good agreement in principle with the corresponding experimental results. Our model enjoys ameliorated accuracy and generalized compatibility compared to some conventional models, thus paving the way for further applications in chirped pulse amplifications.

Modeling of a dual-wavelength fiber amplification system for further mid-infrared generation

“…Due to its high surface-area-tovolume ratio, the fiber laser system overcomes heat dissipation problems, provides higher average power, and realizes stable and alignment-free operation. There are many research efforts working on the fiber amplification theoretical model [24][25][26][27][28][29][30][31][32][33]. Early studies focused on the steady-state of the fiber system [24][25][26][27][28], and recent studies show more complicated works were centered on the behavior of the pulse amplification by combining the laser rate and Ginzburg-Landau equations [29][30][31][32][33], which took nonlinearity and dispersion into consideration.…”

“…There are many research efforts working on the fiber amplification theoretical model [24][25][26][27][28][29][30][31][32][33]. Early studies focused on the steady-state of the fiber system [24][25][26][27][28], and recent studies show more complicated works were centered on the behavior of the pulse amplification by combining the laser rate and Ginzburg-Landau equations [29][30][31][32][33], which took nonlinearity and dispersion into consideration. However, there is not too much theoretical research working on the dual-wavelength fiber amplifier due to the complexity of gain competition during amplification and amplified spontaneous emission (ASE) between the two wavelength regions.…”