Signal amplification is analyzed in strongly pumped fiber amplifiers both for three-level and
four-level transitions, including scattering loss and excited state absorption. Simple analytic …

We report the study of the excited-state absorption (ESA) spectrum of Er 3+ in erbium-doped
silica fiber (EF) within the telecom band, 1.48–1.59 μ m⁠. Two experimental techniques, the …

In this paper, we present an accurate, fast, and easily implemented procedure for modeling
erbium-doped waveguide amplifiers (EDWA's) with high concentration doping level. The …

Absorption and stimulated emission coefficients for a pump power at 1480 nm are
determined experimentally for three types of erbium-doped silica fiber. Starting from these …

The spectral features of Er 3+ excited-state absorption (ESA) in an erbium-doped silica fiber
(EF) at the telecom wavelengths 1490–1580 nm and at the wavelength 978 nm are reported …

We applied an erbrium-doped fiber amplifier characterization method previously reported for
1480-nm pumped amplifiers to a 980-nm amplifier, obtaining absorption and emission …

A new theoretical approach for modelling the saturated single-pass gain in a three-level
fibre amplifier is presented, relevant to the behaviour of rare-earth-doped silica fibres. This …

A theoretical model for erbium-doped silica fibre lasers including the power modal
distribution is developed. Using overlapping factors, an alternative theoretical model is …

Superluminal and slow-light propagation in erbium-doped optical fibers are theoretically
modeled. The pump and signal fields are allowed to be intensity modulated at the same …

This study demonstrates the potential of cadmium telluride (CdTe), a part of the quantum dot
(QD) family, as a saturable absorber (SA) to generate ultrashort pulses at the C-band region …