Theoretical study of the nonlinear optical properties of photonic crystal fiber
|Keywords||Photonic crystal fiber Supercontinuum Four-wave mixing Optical parametric amplification Wavelength conversion|
Photonic crystal fiber (PCF) is a periodic dielectric structure arranged special fiber along the fiber end face due to its innovative concept , excellent performance and potential in the field of optical communications , nonlinear optics , optoelectronics application prospects become international photonics industry hot topics . Tunability the PCF and flexible structure so that it has high birefringence , controlled dispersion , the high nonlinearity unique nature . Particularly the PCF unique non-linear characteristics are widely used in parametric amplification , the broadband tunable wavelength conversion , optical fiber communication devices , pulse compression and phase modulation . Therefore , the study of nonlinear optical properties of PCF important academic significance and application value . Theoretical research , the main contents are as follows: 1. Outlines the concept of photonic crystal fiber , performance characteristics , and its application progress , and focuses on the application of nonlinear optical nonlinear optical properties of photonic crystal fiber . Classification discuss the effect of the third-order nonlinear photonic crystal fiber , focused on the problem of multiple light waves in PCF caused by the interaction of four-wave mixing and four-wave mixing and phase matching . Femtosecond optical pulse propagation in photonic crystal fiber nonlinear Schr?dinger equation ( NLSE ) is derived starting from the wave equation ; symmetric step-by-step Fourier method numerical solution of the nonlinear Schrodinger equation , to simulate the high-order dispersion order nonlinear effects on transmission of femtosecond light pulses in PCF ; broadening of femtosecond laser pulses in different dispersion zone transfer time domain and frequency domain analysis ; order dispersion , since the steep , pulse intrapulse stimulated Raman effect PCF ultrashort pulse transmission as well as the continuous spectrum . Establish a description of four-wave mixing theory of nonlinear coupled equations , and the numerical solution of the coupled equations using the Runge-Kutta method ; optical parametric amplification gain characteristics , bandwidth characteristics , as well as the conversion of the wavelength conversion efficiency and conversion bandwidth analog photonic crystal fiber length , nonlinear coefficient of dispersion , the pump wavelength and the pump power of the parametric gain and bandwidth , identify the key parameters that affect its performance .