Title :
Finite-difference time-domain calculation with all parameters of Sellmeier´s fitting equation for 12-fs laser pulse propagation in a silica fiber
Author :
Nakamura, Shinki ; Koyamada, Yahei ; Yoshida, Norinobu ; Karasawa, Naoki ; Sone, Hiroyasu ; Ohtani, Morimasa ; Mizuta, Yo ; Morita, Ryuji ; Shigekawa, Hidemi ; Yamashita, Mikio
Author_Institution :
Dept. of Media & Telecommun. Eng., Ibaraki Univ., Hitachi, Japan
fDate :
4/1/2002 12:00:00 AM
Abstract :
In order to both experimentally and numerically investigate nonlinear femtosecond ultrabroadband-pulse propagation in a silica fiber, we have extended the finite-difference time-domain (FDTD) calculation of Maxwell´s equations with nonlinear terms to that including all exact Sellmeier-fitting values. We have compared results of this extended FDTD method with experimental results, as well as with the solution of the generalized nonlinear Schrodinger equation by the split-step Fourier method with a slowly varying-envelope approximation. To the best of our knowledge, this is the first comparison between FDTD calculation and experimental results for nonlinear propagation of a very short (12 fs) laser pulse in a silica fiber.
Keywords :
Fourier transform optics; Maxwell equations; Schrodinger equation; finite difference time-domain analysis; high-speed optical techniques; light propagation; nonlinear optics; optical fibre theory; optical pulse generation; silicon compounds; 12 fs; 12-fs laser pulse propagation; Maxwell equations; Sellmeier fitting equation; SiO/sub 2/; all exact Sellmeier-fitting values; extended FDTD method; finite-difference time-domain calculation; generalized nonlinear Schrodinger equation; nonlinear femtosecond ultrabroadband-pulse propagation; nonlinear propagation; nonlinear terms; plit-step Fourier method; silica fiber; slowly varying-envelope approximation; very short laser pulse; Equations; Fiber lasers; Finite difference methods; Optical propagation; Optical pulse generation; Optical pulses; Resonant frequency; Silicon compounds; Time domain analysis; Ultrafast optics;
Journal_Title :
Photonics Technology Letters, IEEE
