The dispersion and self phase modulation is two important factors of the limit transmission distance in optical fiber communication. A novel method for measuring the dispersion slope of a long single-mode fiber was reported. By asymmetric modulation and Mach-Zehnder interferometer, the interferometer causes counter propagating wave to travel in test fiber with different propagation constants. We introduced the fast Fourier transform technique, the autocorrelation function is brought forward, and the information of the interference fringe is analysis with high speed so that the accuracy of signal is estimated. Successively, the experiment was performed on the test fiber to determine the nonlinear refractive index and self phase modulation, exact pulse bandwidth solution is presented. We found that quantity was depends on the intensity of incidence light and the peak power, and the frequency spectrum is broadening clearly. The result shows that the intensity input and the peak power can affect the phase shift value.

Date Published: 30 April 2004
PDF: 8 pages
Proc. SPIE 5279, Optical Fibers and Passive Components, (30 April 2004); doi: 10.1117/12.521479

Published in SPIE Proceedings Vol. 5279:
Optical Fibers and Passive Components
Steven Shen; Shuisheng Jian; Katsunari Okamoto; Kenneth L. Walker, Editor(s)