The Theoretical And Experimental Study Of Supercontinuous Spectrum In Photonic Crystal Fibers

Photonic crystal fiber is a characteristic of the most prominent is a controllable non-linear characteristics, easier to produce a variety of nonlinear effects, especially for supercontinuum generation.In this paper, nonlinear photonic crystal fiber, designed with high nonlinear photonic crystal fiber, and using split-step Fourier method for generalized nonlinear Schrodinger equation, the main research of the highly nonlinear photonic crystal fiber supercontinuum generation continuous spectrum, the main contents are as follows:First of all, study the properties of supercontinuum relationship between fiber parameters, according to the low noise, ultra-linear chirp and continuous production of flat fiber nonlinearity, dispersion and other parameters of the requirements, design photonic crystal fiber.Secondly, numerical simulated the transmission of ultrashort pulses inself-designed highly nonlinear photonic crystal fiber,using split-step Fouriermethod for generalized nonlinear Schrodinger equation.It is found that thein fluence of initial durations TO,peak powers PO,initial chirp C and center wavelength on laser pulses evolution is different in PCF'different dispersion regions. If we want to obtain optimization supercontinuum, we not only choose the PCF with suit parameter but also choose fit pulse parameters.Finally, the experimental study of the photonic crystal fiber supercontinuum generation,under different pumping power supercontinuum generation and under different pump central wavelength supercontinuum generation. Do simulation the potential applications of supercontinuum.