A NOVEL TECHNIQUE FOR MEASURING GROUP-VELOCITY DISPERSION OF AN INSTALLED ULTRALONG FIBER BY USING ERBIUM-DOPED FIBER AMPLIFIERS

Authors
NAKAZAWA M SAHARA A IMAI T YAMAMOTO T YAMADA E KIMURA Y
Citation
M. Nakazawa et al., A NOVEL TECHNIQUE FOR MEASURING GROUP-VELOCITY DISPERSION OF AN INSTALLED ULTRALONG FIBER BY USING ERBIUM-DOPED FIBER AMPLIFIERS, JPN J A P 2, 34(9A), 1995, pp. 1167-1169
Citations number
8
Categorie Soggetti
Physics, Applied
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
34
Issue
9A
Year of publication
1995
Pages
1167 - 1169
Database
ISI
SICI code
Abstract
A new technique is presented for measuring the group velocity dispersi on (GVD) of optical fibers. It makes it possible to measure the GVD of an already installed ultralong dispersion-shifted fiber. The method i s based on phase rotation measurement, but it includes erbium amplifie rs and an optical circulator or a 100% reflector. This allows round-tr ip propagation of the modulated signal and the GVD Nas successfully me asured at one terminal. The maximum measurable length is as long as 12 5 km.