VORRICHTUNG ZUM MESSEN DER DAEMPFUNG OPTISCHER WELLEN AUF OPTISCHEN UEBERTRAGUNGSSTRECKEN

摘要

In order to be able to measure the attenuation of a lightwave guide fiber definitely and reproducibly, it is suggested to offer a mode distribution to the lightwave guide to be measured which corresponds with the "steady state" of a very long fiber. A mode mixer and a mode stripper is for this purpose connected in series with the lightwave guide to be measured. All core modes and leakage- and jacket modes are excited in the mode mixer. In the mode stripper the jacket- and leakage modes are again stripped (absorbed) so that a mode distribution, comparable to the "steady state", remains.