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In this paper, a photonic crystal fiber (PCF) with core infiltrated with Nitrobenzene is proposed and investigated. Its feature properties as the effective refractive index, effective mode area, chromatic dispersion, and confinement loss have been numerically simulated. The obtained results show that characteristic quantities of PCF with core infiltrated with Nitrobenzene (PCF-N) having some advantages in comparison to PCF with core infiltrated with Toluene (PCF-T) at 1.55μm wavelength. For the purpose of supercontinuum generation, two optimal structures with lattice constants 2.0μm and 2.5μm with filling factors d/Ʌ = 0.3 are identified.

In this paper, we consider the model of a nonlinear system subjected simultaneously to a random telegraph noise and a white noise. By using the formulae of differentiation introduced by Shapiro and Loginov (Physica 91:563–574, 1978), an exact equation for the steady state probability distribution of fluctuation in this system is derived. As an example of its application, we calculate analytically the steady state probability distribution of fluctuation and show the existence of noise induced phase transitions (Wodkiewicz et al. in J. Opt. Soc. Am. 1:398–405, 1984a) in Raman Ring Laser. Moreover, we show explicitly the so-called noise reduction considered in Lewenstein and Rzązewski (Opt. Commun. 63:174–178, 1987) for this system. It follows that the Stokes output of this laser tends to the stabilization under influence of the broad-band telegraph pump. This phenomenon could be realized experimentally in a much easer manner than for the case of Gaussian pump, because the construction of the injected telegraph pump signal is much easer than in the case of Gaussian signal. The recent paper is an extended version of Doan and Van (1991).