In this paper, a new structure of highly nonlinear low dispersion photonic crystal fiber （HN- PCF） by elliptical concentration of GeO2 in the PCF core has been proposed. Using finite difference time domain （FDTD） ...In this paper, a new structure of highly nonlinear low dispersion photonic crystal fiber （HN- PCF） by elliptical concentration of GeO2 in the PCF core has been proposed. Using finite difference time domain （FDTD） method, we have analyzed the dispersion proper- ties and effective mode area in the HN-PCF. Simulative results show that the dispersion variation is within 4-0.65 ps/（nm.km） in C-band, especially 0.24ps/（nm.km） in 1.55 ~tm wavelength. Effective area and nonlinear coeffi- cient are 1.764pm2 and 72.6Wl＂km-1 respectively at 1.55 ~tm wavelength. The proposed PCF demonstrates high nonlinear coefficient, ultra small effective mode area and nearly-zero flattened dispersion characteristics over C- band, which can have important application in all-optical wavelength conversion based on four wave mixing （FWM）.展开更多
文摘In this paper, a new structure of highly nonlinear low dispersion photonic crystal fiber （HN- PCF） by elliptical concentration of GeO2 in the PCF core has been proposed. Using finite difference time domain （FDTD） method, we have analyzed the dispersion proper- ties and effective mode area in the HN-PCF. Simulative results show that the dispersion variation is within 4-0.65 ps/（nm.km） in C-band, especially 0.24ps/（nm.km） in 1.55 ~tm wavelength. Effective area and nonlinear coeffi- cient are 1.764pm2 and 72.6Wl＂km-1 respectively at 1.55 ~tm wavelength. The proposed PCF demonstrates high nonlinear coefficient, ultra small effective mode area and nearly-zero flattened dispersion characteristics over C- band, which can have important application in all-optical wavelength conversion based on four wave mixing （FWM）.
