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Key issues related to the design of electro-optic transmitters and receivers are discussed in this paper. These topics include limitations in 100G transmission systems resulting from the frequency response of devices and non-linear effects. Numerical simulations illustrate the importance of realistic modeling in such high-speed systems.
The polarization anisotropy of microstructure fibre may be introduced especially to provide more possibilities to control the supercontinuum production. Thus polarization degree of freedom should be incorporated to the numerical model. In this paper we analyze numerically the supercontinuum generation in the microstructure fibres with periodically modulated holes ellipticity. Femtosecond pulse propagation...
In this study we perform a detailed investigation of the ultrafast processes which govern the intradot recovery dynamics of a QD InAs/GaAs structure under reverse bias condition by means of the single and two colour pump-probe technique. By studying the GS and ES recoveries as a function of reverse bias voltage and fitting the experimental results with a simple rate equation model for the intradot...
We experimentally study the characteristics of optical rogue waves in supercontinuum generation in the femtosecond regime. Specifically, the intensity histograms obtained from spectrally filtering the supercontinuum exhibit the L-shaped characteristics typical of extreme-value phenomena on the long wavelength. Furthermore, the form of the histogram on the long wavelength edge varies from L-shaped...
All-optical modulation over ultra-wide wavelength range using intersubband transition (ISBT) quantum well will be presented. This is based on cross-phase modulation (XPM) through the intersubband transition in an InGaAs/AlAsSb coupled quantum well using a linearly polarized pump wave. Optical millimeter wave at 76 GHz has been generated over a wavelength range of 1330 - 1620 nm using sinusoidal-intensity...
In this paper, we describe compact laser sources based on high-power amplification in Yb-doped silica fibers of ultra-stable mode-locked pulses from an all-fiber oscillator. The interplay between third-order nonlinearity, gain and chromatic dispersion in the polarization-maintaining fiber amplifier is engineered to produce high-quality, high-energy pulses suitable for nonlinear generation of light...
Organometallics nano complexes are important targets for the construction of advanced materials, the investigation of electron-transfer processes and of novel devices for non-linear optical (NLO) applications. In this work the diagnostic and characterisation of novel molecular organics nano complexes thin films functionalized for NLO applications will be discussed. On other hand a rich study of the...
Ultrafast laser ablation has been used successfully to grow glass thin films from bulk glass targets. The laser frequency, laser energy, process gas pressure, substrate temperature, substrate distance and substrate temperature where optimized to obtain highly transparent glass films of Er3+-doped tellurite glass. An empirical approach was followed to optimize the deposition parameters for the film...
In this paper passively mode-locked erbium doped fiber laser is described. With all-fiber cavity configuration 169 MHz fundamental repetition frequency and average output power of more than 30 mW were achieved. Output frequency comb spectrum of 28.5 nm and 111 fs pulses were obtained.
In this paper we analyze, based on numerical simulations, the dynamics of semiconductor devices incorporating quantum dots (QDs). In particular we emphasize the unique ultrafast carrier dynamics occurring between discrete QD bound states, and its influence on QD semiconductor optical amplifiers (SOAs). Also the possibility of realizing an all-optical regenerator by incorporating a QD absorber section...
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