In this work, an exact numerical analysis has been made for rate equations of continuous-wave (CW) cladding-pumped
fiber amplifier. A comprehensive form is considered including the pump coupling efficiency, splice points and scattering
Moreover, we have focused on determination of the small-signal gain and the saturation power for a typical single-stage
large-mode area (LMA) Yb-doped silica fiber amplifier based on the steady-state amplification relation. The dependency of
those parameters to the pump power is investigated which is significantly due to the signal power filling factor.
In this work, an exact numerical analysis of an end-pumped continuous-wave (CW) double-clad fiber laser with linearcavity
design has been intensively carried out based on a set of propagation rate equations including loss coefficients.
Following the theoretical analysis of the rate equations describing pump coupling, fiber end-face cleaving (air
reflection), splice points, combiner, fiber Bragg gratings (FBGs) and scattering losses, a comparison has also been made
between the numerical predictions and the experimental results due to a typical single-mode ytterbium (Yb)-doped silica
rectilinear fiber laser.
High-power, single longitudinal mode, single-polarization beam generates from a polarization maintaining double-clad
Yb-doped silica fiber laser is more applicable for inertial confinement fusion (ICF) applications. The laser beamlets that
converge on a target originate from a low power fiber laser in the master oscillator room (MOR). The laser seed signal
amplifies through several cascaded amplifier chains in the front-end system. Today, the most famous fusion facilities,
including National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL), Ligne d’Intégration
Laser- Laser Mégajoule (LIL-LMJ) and OMEGA utilize fiber-based lasers. In this paper, we have compared various
pumping modes comprising end-pumped master oscillator-power amplifier (MOPA) configuration and distributed sidepumped
multifiber series fiber laser for scaling up the power of large-mode area (LMA) Yb:silica fiber laser for forward