Evaluation of longitudinal chromatic dispersion

Author

Kuwaki, Nobuo ; Ohashi, Masaharu

Author_Institution

NTT T ech. Assistance & Support Center, Tokyo, Japan

Volume

8

Issue

10

fYear

1990

fDate

10/1/1990 12:00:00 AM

Firstpage

1476

Lastpage

1481

Abstract

The relationship between changes in the refractive index along a fiber and chromatic dispersion is investigated theoretically. The variance of the chromatic dispersion along a fiber is approximately proportional to that of longitudinal structural fiber parameters. To control the dispersion to within ±1 ps/km/nm, theoretical results indicate that the longitudinal deviations of the core radius and relative index difference must be less than 0.04 μm and 0.014%, respectively, for W-type dispersion-flattened fiber. Measurements of the standard deviation of the change in the longitudinal parameter for W-type dispersion-flattened fiber fabricated by the vapour axial deposition VAD method show that chromatic dispersion deviation is mainly caused by longitudinal core radius deviation. The effective standard deviation of the core radius is estimated to be within 0.03 μm

Keywords

chemical vapour deposition; optical dispersion; optical fibres; refractive index; VAD method; W-type dispersion-flattened fiber; chromatic dispersion deviation; core radius; longitudinal chromatic dispersion; longitudinal core radius deviation; longitudinal structural fiber parameters; refractive index; relative index difference; standard deviation; Chromatic dispersion; Helium; Laboratories; Manufacturing; Measurement standards; Preforms; Reactive power; Refractive index; Standards development; Structural engineering;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.59184

Filename

59184