As there are high demand in the quantum treatment of fiber-optic communication technologies, investigation of inherent quaantum noise in pulse propagation along a waveguide is essential. In this paper, we simulate the pulse propagation through an optical fiber in presence of the third order dispersion coefficient and show the amplitude errors of the propagated soliton. Finally, we compare our simulation results with those obtained when the second order dispersion coefficient is just considered.
The effective refractive indices of each mode of a windmill single crystal sapphire fiber as function of wavelength can be obtained by finite element method. Recently, it is shown that this fiber operates in single-mode condition for a wide wavelength range. The dispersion and the slope of dispersion for the fundamental mode of a windmill single crystal sapphire fiber are properly obtained making use of the measured values of the refractive index as a function of the wavelength. Subsequently, the pulse evolution along this windmill fiber is investigated for low peak power pulses. Due to high applicability of broadband light sources, here, supercontinuum generation process is also studied when high peak power pulses are launched into the single-mode windmill single crystal sapphire fiber. Due to its unique optical properties, the single-mode windmill single crystal sapphire fiber can be used to generate broadband IR supercontinuum light compared with the conventional single crystal sapphire fiber. Our simulation results indicate that generated output spectrum contains dense frequency combs in a wide range. This broadband IR light source facilitates IR spectroscopy while its frequency combs are important in the development and improvement of the optical metrology.
Making use of the canonical quantization theory and defining proper creation and annihilation operators, the total
Hamiltonian for the pulse propagation through the optical fiber is quantized. An operator form of the nonlinear
Schrodinger equation is obtained implementing the resulted Hamiltonian. We, then, use the results of the positive P-representation
and obtain a coupled stochastic nonlinear Schrodinger equation. Finally, we simulate these equations and
argue about supercontinuum generation process in optical fiber (especially in photonic crystal fiber).
In this essay, we investigate the higher order dispersion effects on supercontinuum (SC) generation in microstructure fibers by studying the temporal and frequency dependence of the ejected pulse. We also investigate the soliton formation and spectrum broadening. In these processes, we observed dispersive wave generated due to soliton fission. Here, we solve nonlinear Schrodinger equation by split step Fourier method.
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