Paul J. Vella

In-line testing for fiber subscriber loop applications

With fiber approaching the subscriber premises much attention is being given to maintenance and repair issues. A novel approach for conducting Fiber Loop Testing on bidirectional single-fiber networks is described. Through the use of the system laser and detector regular maintenance and testing can be carried out in-line without interrupting traffic. Apart from the obvious cost savings other advantages of this approach include the integration of the fiber testing function into the transmission system and the automation of the testing and fault locating process.

Field - Usable Chromatic Dispersion Test Set For Single-Mode Fiber

A simple and accurate method for measuring the chromatic dispersion of long spans of single-mode fiber in the vicinity of the minimum-dispersion wavelength is described. Agreement with Nd-YAG/Raman measurements is better than 0.5 ps/km nm within ± 30 nm of the wavelength of minimum-dispersion. Long-haul measurements on recently installed fiber-optic cables will be discussed.