Abstract

The impulse response and bandwidth of GeO₂-doped and B₂O₃-doped multimode optical fibers are calculated from their measured refractive index profiles. The computational method is based on the WKB solution of the guided mode problem in which the pulse delay time of each mode is determined with profile dispersion being taken into account. Accurate profiles are obtained by a newly developed focusing technique, which allows measurements to be made on whole-fiber samples. The predicted bandwidths of the GeO₂-doped fibers range from approximately 200 to 1200 MHz·km and are in good agreement with the bandwidths and impulse responses previously measured by frequency-domain and time-domain optical shuttle pulse techniques on kilometer lengths of the fibers.

© 1979 Optical Society of America

Calculation of bandwidth from index profiles of optical fibers. 1: Theory

D. Marcuse
Appl. Opt. 18(12) 2073-2080 (1979)

Effects of profile deformations on fiber bandwidth

D. Marcuse and H. M. Presby
Appl. Opt. 18(22) 3758-3763 (1979)

Multimode delay compensation in fibers with profile distortions

D. Marcuse
Appl. Opt. 18(23) 4003-4005 (1979)

Refractive-index profiling of single-mode optical fibers and performs

Herman M. Presby, Dietrich Marcuse, and William G. French
Appl. Opt. 18(23) 4006-4011 (1979)

Comparison of calculated and measured impulse responses of optical fibers

Katsunari Okamoto
Appl. Opt. 18(13) 2199-2206 (1979)