Broadband and low loss capability of photonics has led to an ever-increasing interest in its
use for the generation, processing, control and distribution of microwave and millimeter …

Several approaches have been developed for modelling the gain and saturation behaviour
of semiconductor lasers, and this study includes a historical review of these various …

Julian Jones studied physics at the University of Wales, Aberystwyth, where he gained his
BSc and, in 1980, a PhD on the plasma chemistry of excimer lasers. After a brief period as a …

Recent progress in semiconductor laser amplifiers (SLAs), mainly GaInAsP traveling-wave
semiconductor laser amplifiers (TWAs) for use in optical fiber transmission systems, is …

The nonlinear susceptibility of semiconductor gain media is obtained by including the effect
of intraband carrier relaxation within the density~ matrix formalism. The result is used to …

Optical communications technology is growing increasingly in importance, with a rapid pace
of development. Innovative optical devices have emerged from the integration of …

We present an all optical delay-line radio-frequency (RF) notch filter. The filter exploits cross-
gain modulation in a homogeneously broadened laser medium to obtain a negative tap in …

The optical nonlinearity in a semiconductor laser gain medium is investigated through
copropagating nearly degenerate four-wave mixing (NDFWM) in a 1.5-mu m InGaAsP …

A theoretical study of channel crosstalk due to gain saturation in a laser amplifier in
multichannel transmission is discussed. When the amplifier is gain-saturated, the gain of any …

The principles, design, and operation of erbium-doped and Raman amplifiers, two of the
most important classes used in modern lightwave communication, are described. Developed …