Thus P' represents the maximum value of the spectral absorption coefficient if only Doppler broadening occurred; b, bc, and bD denote, respectively, the natural half-width,t the half-width resulting from collision (Lorentz) broadening, and the half-width produced by Doppler broadening; S is the integrated intensity of the spectral line under study whose center lies at wo; m is the mass of the r...

Abstract The pedestal turbulence intensity required to convert the thin, laminar H-mode scrape-off layer (SOL) a broad turbulent SOL is calculated using theory of spreading. A lower bound on level exceed neoclassical heuristic drift (HD) width derived. reduced model spreading used determine as function flux from SOL. cross-over value for exceeding HD then calculated. We levels—and critical scal...

Picosecond laser pulse propagation in monomode optical fiber is demonstrated and investigated by numerically simulation in this paper. The numerical simulation is done by nonlinear Schrödinger equation with the aid of Mathlap program. The results show that self phase modulation (SPM) leads to broadening the spectral width from 5nm to 38nm after 50m of the fiber length and accompanied by tempora...

2 Radiation and Atoms 1 2.1 Width and Shape of Spectral Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1.1 Lifetime Broadening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1.2 Collision or Pressure Broadening . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1.3 Doppler Broadening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

A new model of pump noise in supercontinuum and rogue wave generation is presented. Simulations are compared with experiments and show that the new model provides significantly better agreement than the currently ubiquitously used one-photon-per-mode model. The new model also allows for a study of the influence of the pump spectral line width on the spectral broadening mechanisms. Specifically,...

Beam broadening effects on the Doppler radar spectrum induced by alongand cross-radar-beam winds are theoretically investigated in this article. Analytical expression of beam broadening spectrum for a vertical beam subject to a constant vertical wind in the absence of horizontal wind is derived first. We find that the resultant beam broadening spectral shape is in an exponential form, rather th...

The dispersion experienced by a signal in a slow light system leads to a significant pulse broadening and sets a limit to the maximum delay actually achievable by the system. To overcome this limitation, a substantial research effort is currently being carried out, and successful strategies to reduce distortion in linear slow light systems have already been demonstrated. Recent theoretical and ...